Clean Coal Technology

2019年S1期目次

Effect of technological optimization on cost in Daliuta coal preparation plant
TIAN Yi;Operations Department,Shendong Coal Preparation Center;
Slime water treatment is an important link in coal preparation plant production,which not only directly affects the realization of closed-circuit washing water cycle in coal preparation plant,but also is one of the most expensive links in coal washing production. By analyzing the coal quality characteristics of daliuta coal preparation plant and combining with its actual washing cost composition,this paper optimizes the process of dust coal system in daliuta coal preparation plant,and compares and analyzes production benefits and washing cost. Process optimization the dry dedusting process for the end coal of daliuta coal preparation plant can prevent the coal powder from flooding into the sorting system,and the sludge will produce more fine coal slime,thus reducing the total amount of slime in the system,thus reducing the pressure of slime water system,reducing the difficulty of dewatering slime products and reducing the operation cost of the process system. Taking the average annual price of 2018 as the base price,the dry dedusting process of < 6 mm is more efficient and economical than the fully selected process of coal,and the separation cost is significantly reduced,thus achieving the expected effect of process optimization.
2019 S1 v.25 [Abstract][OnlineView][Download 91K]

Application of self-cleaning sieve plate in Shangwan coal preparation plant
LYU Hongguang;Daliuta Coal Preparation Plant,Shendong Coal Preparation Center;
In view of the problems such as too large installation angle of screening machine,low screening efficiency,low raw coal selection rate and high content of material mismatch in Shangwan coal preparation plant,a new type of self-cleaning screen plate is introduced and applied. Based on the actual production situation of Shangwan coal preparation plant,the comprehensive separation indexes of 13 and 25 mm sieve plates were determined by comparative screening test. Compared with the test data of traditional polyurethane sieve plate,the comprehensive separation index of self-cleaning sieve plate in 25 mm classification is 1.83% higher than that of traditional sieve plate in25 mm combined with 50 mm classification,and the service life of sieve plate is extended,which not only improves the selection rate,but also effectively reduces the content of mismatch in screening materials,reduces the treatment pressure of slime water and ensures the coal blending under the screen particle size stability.
2019 S1 v.25 [Abstract][OnlineView][Download 98K]

Practice of slime water treatment in Shigetai coal preparation plant
CONG Rihong;Shendong Coal Preparation Center;
This paper analyzes the problems existing in the treatment of slime water in Shigetai coal preparation plant,and in view of the existing problems,through the research and analysis on the reduction of slime,the improvement of slime settlement effect,the improvement of slime treatment equipment effect and the improvement of slime quality,this paper puts forward a set of coal slime treatment scheme which is suitable for Shigetai coal preparation plant,solves the problems existing in coal slime water system,and ensures the increase of raw coal washing rate and the normal operation of the coal preparation plant.
2019 S1 v.25 [Abstract][OnlineView][Download 83K]

Research and optimization on the improvement of processing efficiency of pressure filter in coal preparation plant
PAN Yuejun;ZHAGN Xinyuan;Shengdong Coal Preparation Center;Shangwan Coal Preparation Plant,Shengdong Coal Preparation Center;
In order to further enhance the efficiency of the pressurized filter dealing with high ash of fine mud and improve the coal preparation plant in coal mine and coal gangue clay processing ability,this article bases on the working principle of pressure filtration machine and the factors that affect work efficiency,through the adoption of filter press working parameters adjustment,the mixed crude,into the material viscosity adjustment,such as the use of filter aid measures,effectively optimize the pressurized filter into the material conditions,to improve the working effect of the pressure filter. By reducing the cyclone cone than run after coarse fraction > 0.5 mm coarse particle material from 1.3% to 4.3% and < 0.075 mm fine grained materials from the original down to 46.9% 69.2%,basic time control of pressure filter under 240 s is discharged. When into the material concentration pressure filter in 375 g/L,filter cake moisture content is in commonly25%,both can satisfy the requirements of the product's moisture and can guarantee the production capacity of the filter press. Perfecting the filter aid to add facilities,the long-term use of polymerization and aluminum chloride as a filter aid process is formed,a single processing high ash of fine mud time from 500 s to 300 s is made,and the processing efficiency and capacity is increased by 60%. It can also reduce the thickener operation risk,improve the processing ability,improve the operation effect and ensure the stable operation of coal preparation plant production.
2019 S1 v.25 [Abstract][OnlineView][Download 86K]

Study on heavy medium separation of coarse slime in power coal preparation plant
XING Huan;Shendong Coal Preparation Center;
In general power coal preparation plants,coarse slime is treated by hydrocyclone + spiral separator or hydrocyclone + arc screen+ Slime Centrifuge,but less by dense medium hydrocyclone. Based on the study of the factors such as feed pressure and separation density of the heavy medium hydrocyclone,the feasibility of using the heavy medium hydrocyclone to separate the coarse slime in the power coal preparation plant is discussed. The results show that the coarse slime can be effectively separated by using the recovery method of the coarse slime heavy medium hydrocyclone in the treatment of the coarse slime in the coal preparation plant. According to the characteristics of the coarse slime in the coal oil preparation plant,when using the two product slime heavy medium hydrocyclone,the ash content of the final cleaned coal cannot be reduced to less than 3% by adjusting the feeding pressure and separation density. When the three product slime dense medium cyclone is used for coarse slime recovery,and the actual production density is used,the feeding pressure can be increased properly,which can meet the requirements of less than 3% ash content in the final clean coal and achieve the expected purpose.
2019 S1 v.25 [Abstract][OnlineView][Download 243K]

Study on precise control system of bypass raw coal quality
HAN Xiaodong;Shendong Coal Preparation Center;
In view of the problems existing in the bypass raw coal production system of coal preparation plant,such as low production efficiency,high failure rate of equipment,difficulty in handling,and difficulty in coal quality control,etc. A precise control system of bypass raw coal system is studied,and the optimization analysis of bypass raw coal production system is carried out with the example of Wulan Mulun coal preparation plant,the coal preparation center of Shendong Coal Preparation Center. On the basis of the existing technology,by adding a frequency-conversion coal feeder and installing a drop-proof protection in the feeding trough of the coal feeder,the coal feeder and the on-line ash analyzer realize the linkage control,and the crusher establishes a locking relationship with the equipment of the coal feeder at the higher level.Thus,on the one hand,it can effectively solve the problem of reducing crushing death of crusher,on the other hand,it can also realize the high-efficient and accurate control of coal quality and coal quantity of bypass system.This process can realize the locking relationship between coal feeder and crusher,and can completely solve the problems of crusher crushing and fluid coupling oil injection caused by normal failure stopping.It reduces the labor intensity of the post and the repairman to deal with the fault,and also reduces the time of dealing with the blocking fault,which greatly improves the production efficiency of the bypass system. In addition,the newly added coal feeder is frequency conversion control coal feeder.Compared with the former hydraulic plug plate,the latter control precision is more refined.It can realize the fine adjustment of coal quantity,and is conducive to the realization of lean management of coal quality in our plant.
2019 S1 v.25 [Abstract][OnlineView][Download 115K]

Application of high efficiencyself cleaning sieve plate in Yujialiang coal preparation plant
TIAN Yanfeng;Shendong Coal Preparation Center;
in view of the low screening efficiency of the traditional sieve plate and the clogging of the sieve hole,Yujialiang coal preparation plant replaced the raw coal classification screen with the high-efficiency self-cleaning sieve plate,analyzed the characteristics of the high-efficiency self-cleaning sieve plate,discussed its application in Yujialiang coal preparation plant,and analyzed its advantages and disadvantages. The results show that the high-efficiency self-cleaning sieve plate has good relaxation performance,and each sieve wire is independent of each other,which has self vibration effect. In Yujialiang coal preparation plant,the plugging rate of high-efficiency selfcleaning sieve plate is about 6.63%,which reduces the labor and time of manual cleaning screen surface,while the plugging rate of original punching sieve plate with 25 mm stoppage ratio is about 11%. The abrasion of screen bar is less than 5%,which has good wearing quality performance. For materials with high water content and high viscosity,the use effect is more obvious. After the application of high efficiency self-cleaning sieve plate in Yujialiang coal preparation plant,the blocking problem is solved,the screening efficiency is improved,the classification granularity is reduced,the selection quantity is increased,the product coal composition is optimized,and the overall process effect of the coal preparation production system is improved.
2019 S1 v.25 [Abstract][OnlineView][Download 132K]

Measures and effect of quality improvement and efficiency increase in Bulianta coal preparation plant
WANG Bin;LIU Yuhao;SHANG Ming;ZHAO Huanyu;Bulianta Coal Preparation Plant,Shendong Coal Preparation Center;Shendong Coal Preparation Center;
In view of the raw coal quality and production demand in the coal market of Bulianta Coal Mine,and in order to improve the production efficiency of the enterprise,the optimization of the process system,the advanced treatment of slime,the short process of gangue slime,the switching of production system,the optimization of 1-2 coal slime process and the optimization of production were carried out by analyzing the problems existing in the process system of Bulianta Coal Preparation Plant. The series of measures have effectively improved the quality of commercial coal,increased the quantity and output of variety coal,and guaranteed the maximum profit of coal preparation plant.
2019 S1 v.25 [Abstract][OnlineView][Download 180K]

Process optimization of raw coal system
JIN Baowen;Bulianta Coal Preparation Plant,Shendong Coal Preparation Center;
According to the main production problems of raw coal system in coal processing plant,this paper puts forward the thinking and direction of raw coal processing plant,and expounds the effect of raw coal processing plant after raw coal process system transformation.The full text runs through the improvement of process and equipment as the main line,and improves the quality of raw coal separation as the goal. It is proposed that under the premise of improving the production system,qualified raw coal will be provided,and the yield and efficiency of special coal will be improved. Clearly strict preparation quality of raw coal is the premise to improve washing efficiency.
2019 S1 v.25 [Abstract][OnlineView][Download 105K]

Research and practice on optimization of screening system in Bulianta coal preparation plant
SI Guanghui;Bulianta Coal Preparation Plant,Shendong Coal Preparation Center;
The screening system of Bulianta coal preparation plant has undergone three times of reconstruction and expansion.Due to nonsimultaneous construction,there are many problems restricting production.In order to solve the problems of maximizing the washing capacity of the 1-2 coal main washing system and the 2-2 coal main washing system,reducing the pressure of the 2-2 coal main washing slime water system,and further improving the production efficiency,etc.,the process flow of the screening system is analyzed,the optimization measures of the screening system are introduced,including: optimization of the screening process from three products to four products,automatic adjustment and optimization of fine coal washing quantity,optimization of discharging mode of screen scraper and Automatic reverse procedure,etc.,and the existing problems and solutions are put forward.
2019 S1 v.25 [Abstract][OnlineView][Download 154K]

Feasibility study of heavy medium two-segment magnetic selection in Bulianta coal preparation plant
ZHAO Jingwen;Bulianta Coal Preparation Plant,Shendong Coal Preparation Center;
Aiming at the problem of medium recovery of 2-2 coal washing system in Bulianta Coal Preparation Plant,direct magnetic separation adopted,the magnetic separator often has no overflow or less overflow. When shunting,the qualified medium returns directly to the magnetic separator,resulting in a sudden increase in the feed concentration of the magnetic separator,a decrease in the recovery efficiency of the magnetic separator and a higher magnetic content in the magnetic separation tailings. According to the actual situation of the main washing system of 2-2 coal,it was proposed that the magnetic separation tailings of the lump coal system should be secondary magnetic separation by simply reforming the pipeline of the lump coal medium system. The results show that the feed volume per hour of magnetic separator increases,while the solid content in the feed increases. But the percentage of magnetic content decreases,which plays a role in diluting the feed concentration. The overflow effect is improved. The efficiency of magnetic separator is increased by 0.05% and the economic benefit would be increased by about 424.6 thousand yuan.
2019 S1 v.25 [Abstract][OnlineView][Download 90K]

Research on intelligent anti-freeze energy-saving technology of loading system based on environmental temperature data and vehicle speed data
LI Tongpo;Shendong Coal Preparation Center;
The purpose of this paper is to solve the problem that if the coal content of the coal preparation plant is low in winter,and the moisture content of the product coal is high,the frozen coal will be agglomerated during the transportation of the product coal.The product coal is bonded to the inner wall of the train compartment.In the above,the problem of the normal unloading of the product coal is affected.At present,the main measures adopted in the industry are spraying the antifreeze on the inner wall and the bottom of the compartment before loading the car,and spraying the antifreeze into the coal stream while the product coal is discharged into the car.However,in the current winter loading and unloading,there are many artificial interventions such as antifreeze preparation spraying,antifreeze powder dispersion and so on,uneven spraying and dispersing,high failure rate,antifreeze and antifreeze powder waste,antifreeze The preparation of the temperature is poorly adaptable,the spray accuracy is low and other outstanding problems.For the above problems,the combination of mechanical,electrical,hydraulic and other control methods is used.The hydraulic system is used as the power source,and the hydraulic cylinder drives the swing arm to adjust and control the antifreeze nozzle mechanism.Rotary,using electromagnetic vibrating feeder to control antifreeze powder dispersion and spreading,automatic and manual control methods,combined with real-time vehicle speed,ambient temperature and product coal moisture and other data information,automatically adjust antifreeze preparation concentration,antifreeze spraying amount,antifreeze The powder disperses the amount of material,realizes the automatic control of the car spray,the loading chute outlet mixed with the coal flow spray,and the front anti-freeze powder dispersion and spread material,and solves the problem that the spray is not stopped when the gap between the two wagons is stopped and the speed is slowed down.The environment caused by the amount of spraying causes pollution and waste problems,saving manpower and a large amount of antifreeze anti-freeze powder.When designing the system and selecting components,fully consider the protection level to meet the harsh conditions of cold,dust and humidity,ensure the reliable operation of the system,and automatically optimize and adjust according to the ambient temperature data,real-time vehicle speed data and actual loading conditions. Antifreeze preparation concentration,antifreeze spraying,antifreeze powder dispersion and spreading scheme to achieve energy saving and efficiency. According to the CHN Energy Shendong Coal Preparation Center,Daliuta Coal Preparation Plant,Shangwan Coal Preparation Plant,Bulian Tower Coal Preparation Plant and other coal preparation plants,the automatic spraying and antifreeze powder dispersion in the loading and transportation system of the coal preparation plant are retrofitted.The successful implementation of the scheme and achieved results,and discussed the high failure rate,high cost,and control of antifreeze preparation concentration in a series of links such as automatic preparation of antifreeze,automatic spraying,and automatic dispersion of antifreeze powder in the loading system of coal enterprises After the coarse ore,antifreeze spraying and antifreeze powder dispersing waste,etc.,after conducting in-depth research on the antifreeze preparation spraying system and the antifreeze powder dispersing and spreading system,a set of optimization and transformation schemes are proposed,aiming at the hardware composition and function of the scheme.The characteristics have been elaborated.
2019 S1 v.25 [Abstract][OnlineView][Download 337K]

Application of lidar sensor on heavy medium automatic adding system of coal preparation plant
ZHOU Zenghong;CHN Energy Shendong Coal Group Co.,Ltd.;
Heavy medium separation is a common production process in all coal preparation plants of Shendong coal preparation center. It is also the main separation method in China's coal preparation production and the main direction of coal preparation development. At present,the manual feeding method is still used in the process of heavy medium separation,which restricts the production automation of coal preparation. Combined with the intelligent transformation of the heavy medium coal preparation process in the coal preparation plant,the effective application of lidar sensor in the heavy medium automatic addition system of the coal preparation plant is studied,which realizes the automatic addition of heavy medium in the heavy medium separation process.
2019 S1 v.25 [Abstract][OnlineView][Download 172K]

Application of coal on-line coal quality laser analyzer in Shendong coal preparation plant
WANG Zhenlong;CHN Energy Shendong Coal Preparation Center;
In order to solve the problems of artificial interference,long test cycle and lagging test results of traditional test methods,to realize the quick inspection of coal quality of Shendong commodity coal,after comparing the advantages and disadvantages of the commonly on-line coal quality inspection technology,a safe and pollution-free laser all-element coal quality online analyzer is selected and combined with the sampling system to realize the rapid detection of commercial coal. Five coal quality indexes,namely,total water,ash content,calorific value,volatile content and total sulfur,were detected in real time by online coal quality analyzer. Compared with the results of conventional inspection,the deviation between the detected value of the laser all-element coal online analyzer and the conventional analytical method is small. However,due to the large water content of mixed coal,easy evaporation and complicated coal quality,the deviation of the mixed coal online analyzer is larger than that of cleaned coal. The measurement of ash content and calorific value by analyzer is in good agreement with the change trend of conventional measurement. The application results show that the combination of laser all-element coal quality on-line analyzer and sampling system can meet the requirement of quick detection of Shendong commercial coal.
2019 S1 v.25 [Abstract][OnlineView][Download 149K]

Analysis and response of conveyor reducer protruding shaft seal leakage
XIAO Wenyuan;LI Peng;BAI Xiaobang;Shendong Coal preparation Center;
The reducer is one of the key components that are indispensable for the scraper and belt conveyor in the coal preparation industry.Its performance directly affects the stable operation of the production.Leakage of the reducer is usually manifested by dripping and leakage of oil on the input and output shafts,which not only causes waste of grease,but also increases the cost of coal preparation.Aiming at the problems of drip-leakage and leakage of reducer,this paper analyzes the damage mode of skeleton oil seal,the pressure difference between the internal and external environment of the reducer,the wear of the seal lip and the design defect of the seal form of the reducer,and puts forward the optimization scheme of drip-leakage and leakage of the extended shaft of the reducer The specific measures are to ensure the installation of the skeleton oil seal in accordance with the standard operating procedures,to properly lubricate and maintain the bearing,to optimize the structure of the reducer ventilator on the basis of the original,to increase the internal ventilation of the reducer during the operation of the equipment,to reduce the internal and external pressure difference,to improve the life of the sealing lip effectively,to adjust the axial mounting position of the reducer out of the shaft frame oil seal to reduce the amount of wear on the protruding shaft,to optimize the sealing structure on the original basis to form a double closed sealing seal,and to further reduce the extension shaft of the reducer.Through the implementation of the above measures,the service life of the reducer is further extended,the equipment failure rate is reduced,the oil leakage condition of the extended shaft is improved,and energy waste is reduced.
2019 S1 v.25 [Abstract][OnlineView][Download 203K]

Optimization of the tail tensioning device of the scraper conveyor
XIAO Wenyuan;WANG Junfeng;SU Cuihua;NAN Chaoyun;Shendong Coal Preparation Center;
The scraper conveyor is one of the key equipment necessary for the normal production and operation of the coal preparation plant,and plays the role of transportation and batching. In this paper,the problems about that the screw of the worm and worm gear tail tensioning device of the coal preparation plant is easy to rust,the maintenance cost is high,the labor intensity of the employees in the tight chain and the loose chain is large,and the hydraulic control of the tensioning device are proposed. The optimization program and achieved good results in the practice run. It not only reduces the labor intensity of employees,but also improves the operation level of electromechanical equipment,saves maintenance and maintenance costs,and realizes the self-control of the tight chain and loose chain of the scraper conveyor to ensure the stable operation of production.
2019 S1 v.25 [Abstract][OnlineView][Download 263K]

Application of automatic antifreeze system in coal preparation plant
HE Jianbin;XIAO Wenyuan;Shendong Coal Preparation Center;
In view of the problems of the traditional anti-freezing vehicle operation of the operation environment is bad,the work of the operation staff labor intensity,spraying low efficiency,spraying effect quality is not stable,difficult to ensure the smooth unloading of the port and loading efficient operation,etc.,through the application of the mechatronics automatic control principle,the original manual spray antifreeze powder method was upgraded and modified,and a set of mechanized automatic antifreeze vehicle system was developed.The specific measures are to consider adding antifreeze powder handling device in the platform design,making electric hoist runway beam and support on the platform,installing mobile electric hoist,realizing mechanization of antifreeze powder to the platform transportation,and analyzing the material supply mode of different forms of coal feeder,homemade anti-freeze powder spraying device.Through the implementation of the above measures,the operating environment of the antifreeze truck has been fundamentally changed,the working conditions of the workers have been improved,the labor intensity of the employees has been reduced,and the spraying method has evolved from the original manual operation to the automated operation,which greatly improved the spraying efficiency.prevented the leakage of antifreeze powder,reduced the labor cost of spraying.The implementation of automatic antifreeze system also reduced the staff from the original 3-4 people to 1 person and reduced the safety hazards.
2019 S1 v.25 [Abstract][OnlineView][Download 241K]

Application of metal detector in coal preparation plant
ZHAO Huilan;CHN Energy Shendong Coal Preparation Center;
In order to solve the problems of the belt machine,such as easily teared and suspension,caused by the mixture of iron and other metal sundry in the coal transporting process in the coal preparation plantmetal detector was designed.Inductance coil and LDC1000 were used as sensor part of the metal detector,and metals can detected based on the electromagnetic induction phenomenon and the eddy current effect.STM32 was used as the main controller to detect the signals from sensors form the SPI interface hen receive the metal detect signal,sen a PWM signal to motor driver circuit,driving the motor to start the iron remover to clear the metal iron on the conveyor belt.The detector can monitor the metal and determine the metal size dynamically.When small pieces of metal were detected,iron remover could be started to remove them automatically,and when a large piece of metal or a long rod metal were detected,the rubber belt machine stop and the metal would be removed manually.The design in this paper can reduce the failure rate,reduce the operating cost,reduce the damage of iron to the equipment,and improve the production efficiency and economic benefits.
2019 S1 v.25 [Abstract][OnlineView][Download 157K]

Design and application of triangular belt disassembly device
ZHANG Shuai;Shendong Coal Preparation Center;
In view of the low maintenance efficiency,the need for multiple people to work together,the high safety hidden dangers and many other problems when replacing equipment triangle belt in coal preparation plant,a kind of disassembly and assembly device about triangle belt is designed and manufactured independently,which can replace the manual operation mode.It only takes 5 minutes to replace the triangle belt of single equipment,and the working efficiency is increased by 83%,greatly reducing the labor intensity of employees.At the same time,it can avoid direct contact between the body and the rotating parts of the equipment,ensuring the personal safety of the operators in the work.And only one person can complete the work,which greatly reduces the share of labor resources.The device is suitable for the replacement of equipment of various specifications triangle,and it has simple structure,low production cost,so that it has extensive application value.
2019 S1 v.25 [Abstract][OnlineView][Download 222K]

Research on intelligent protection test system based on mobile terminal
SU Cuihua;XUE Hongwei;Shangwan Coal Preparation Plant,Shendong Coal Preparation Center;
During the construction of the intelligent coal preparation plant in Shangwan coal preparation plant,the number of workers in the production workshop was reduced,and the original fixed post was changed to the production site inspection. The number of people were reduced from the original 11 to 5. The number of dispatchers changed from double posts to single posts. After it,the role of equipment protection in the safe and stable operation of the production system is more prominent. In order to check the integrity and reliability of equipment protection and ensure the sensitive action of equipment protection at critical moments,the traditional protection test method is to perform full coverage inspection and test of equipment protection by men on a regular basis. The equipment protection of the coal preparation plant is numerous,and the traditional protection test process is cumbersome,heavy and prone to errors. Therefore,it is urgent to find a way to improve the efficiency and effectiveness of employees in the case of a small number of workers. Through research and exploration,the technicians of Shangwan coal preparation plant have jointly developed a new type of protection test system based on mobile terminals with professional information technology companies. The application practice of protection test in recent 3 months shows that the new protection test system realizes the automatic triggering of protection test,the automatic circulation of the whole process,the automatic determination of the intact state of protection,the formation of record reports that can be invoked and query at any time,the formation of closed loop management,and the improvement of the accuracy and efficiency of the test. The protection that has been operated in a single test cycle is automatically judged to be intact,and it is automatically eliminated from the protection task to be tested and repeated labor is avoided. The new protection test system sets up a variety of test modes and realizes the flexible test of protection.
2019 S1 v.25 [Abstract][OnlineView][Download 201K]

Research and application of belt conveyor cleaner in coal preparation plant
BAI Long;LI Peiqi;WANG Bin;KANG Xuegang;Shigetai Coal Preparation Plant,Shendong Coal Preparation Center;
In order to improve the cleaning effect of the tape machine belt surface and reduce the wear of the cleaning device on the belt surface,three types and working principles of the original three belt conveyor cleaners are introduced. In order to solve the problems of high working pressure of the original sweeper,increased resistance of the tape machine,serious wear of the belt surface,and easy to cause belt tearing accidents,three new sweeper types were studied,namely spring-loaded cleaners,heavy-duty cleaners and rotary cleaners,and their effects were analyzed. The result shows that the new cleaner has the self-adjusting function,the adjusting range is larger and more stable.The service life of sweeper block is prolonged,which is more conducive to cost saving. The contact between the cleaner and the belt surface is more uniform and stable,which improves the cleaning efficiency,reduces the maintenance amount,makes it easier to adjust,improves the work efficiency of personnel,avoids the damage to the belt surface,extends the service life of the belt conveyor,and effectively reduces the coal dust in the belt conveyor corridor.
2019 S1 v.25 [Abstract][OnlineView][Download 264K]

Andritz pressure filter gate wear plate modification
ZHU Qin;ZHANG Bingxiang;Shengdong Coal Preparation Center;
Pressure filter is an important equipment for cleaned coal flotation and primary slime dewatering in Shendong washing and preparation center coal preparation plant. Long time use results in increasing of opening and closing frequency and strength of upper and lower sluice wear-resistant plate,resulting in abnormal wear,which seriously affects the production time of coal preparation plant. Combined with the operation situation of pressurized filter in coal preparation plant gate opening and closing under pressure filtration machine difficulties,affect the discharge,ram wear-resisting problems,such as deformation,middle coal accumulation,etc.,pressure filter gate wear plate was modified,through transforming the original manufacturer of wear-resistant plate installation form and structure,so as to prolong service life,avoid accumulation of coal,improve the work efficiency. Material analysis is carried out in the areas prone to bulging and coal accumulation,the original process is changed,and the bottom plate and wear-resistant plate are reformed respectively to ensure the overall performance of the original unloading gate and equipment. The modified Andritz pressure filter has been used for half a year without the above problems,and the brake wear plate can meet all the performance of the original imported equipment,and the production effect is good.
2019 S1 v.25 [Abstract][OnlineView][Download 199K]

Common faults of plate and frame filter press and treatment methods
WANG Libo;LIU Qinju;Baode Coal Preparation Plant,Shendong Coal Preparation Center;
Coal slime has the characteristics of high organic content,fine particles,small specific gravity and low water content. Therefore,it must be dehydrated by using a highly dehydrated machine. The plate and frame filter press has high sludge solidification rate and gradually becomes an important equipment for sludge reduction. This paper briefly introduces the composition and working principle of the plate and frame filter press. Through the accumulation of daily maintenance work experience,the common faults and treatment measures are effectively summarized,It standardizes the daily operation of post workers and effectively avoids unnecessary failures. The plate and frame filter press was optimized. The auxiliary tool for discharging the filter cake can ensure that the filter cake falls off completely. The maintenance cost of the slideway is effectively reduced by changing the slideway section. The effect of material dehydration is good by using the circulating high pressure air for diaphragm extrusion. The special tool for plate and frame connecting chain can shorten the connecting operation time from 3-4 hours to 30 minutes. Chromium coating on the surface of the plunger can effectively prolong the service life of the plunger. The optimization can effectively improve the working efficiency of the plate and frame filter press,and is conducive to the normal operation of the slime water system in the coal preparation plant.
2019 S1 v.25 [Abstract][OnlineView][Download 87K]

Application of material self-flow detection and protection device of belt conveyor in Jinjie coal preparation plant
AI Xizhao;HE Hongwei;Jinjie Coal Preparation Plant,Shendong Coal Preparation Center;
Belt conveyor is an important equipment for material transportation in the engineering industry. Common faults of belt conveyor include belt deviation,belt overload sprinkling,self-flowing of materials when belt climbing slope,etc. Take belt conveyor for example,if the moisture content of raw coal is high,self-flow is prone to occur,and then the phenomenon of overloading coal on belt conveyor may cause the belt conveyor to die. Aiming at the defects of the self-current protection device for belt conveyor materials in Jinjie coal preparation plant,a kind of detection and protection device for belt conveyor materials is designed and developed. By setting up two material level detectors to monitor the transport of belt conveyor materials,abnormal phenomena can be found in time. The protection device is simple in structure and stable in operation. It is especially suitable for belt conveyor with large external water of materials.
2019 S1 v.25 [Abstract][OnlineView][Download 123K]

Application of metal detector in coal preparation plant
GAO Pan;Shangwan Preparation Plant,Shendong Coal Preparation Center;
In order to effectively eliminate the metal debris materials mixed in the process of coal mining and transportation,reduce the damage of the metal debris materials to the equipment of coal washing and processing,the metal materials that may exist in the raw coal is classified,the removal of gold from raw coal by existing iron remover is studied and the new type of metal detector HY-iii is selected.Through debugging and improving,the metal substances which cannot be removed by the existing iron remover and endanger the production line equipment can be effectively eliminated So it can reduce the damage of the washing and processing equipment caused by the metal material mixed in the raw coal,reduce the equipment failure rate,reduce the extra maintenance expenses,and improve the quality index of the commercial coal.
2019 S1 v.25 [Abstract][OnlineView][Download 128K]

Design and application of wireless condition monitoring system in coal preparation plant
HAN Zibin;Shendong Coal Preparation Center;
This paper discusses the establishment of internal monitoring system of coal preparation plant based on sensor network. Based on the hardware platform compatible with ZigBee protocol and the software design based on OPC,the wireless state monitoring system with topological structure is successfully completed. After the establishment,the system can collect data such as temperature,acceleration and so on. It also provides the operation status report of the equipment,which provides important basis for the management and maintenance of the equipment. On the basis of resolving many shortcomings of the industrial bus control scheme in the past,full coverage monitoring of equipment vibration signal and temperature signal and wireless communication between monitoring sub-station and monitoring sub-station are realized. At the same time,monitoring platform is developed to display,store and report the monitoring data. It also has the function of predictive maintenance decision-making to realize early identification and predictive maintenance of equipment faults,which greatly improves the establishment of informatization and Intellectualization in coal preparation plant.
2019 S1 v.25 [Abstract][OnlineView][Download 150K]

Optimization and improvement of repairing technology for side cracking of vibrating screen in coal preparation plant
LI Jinsan;Shendong Coal Preparation Center;
In view of the factors such as improper design and installation,inadequate routine maintenance and overloading and fatigue operation after the vibrating screen has been installed and operated for a period of time in the coal preparation plant,the structural parts of the equipment often appear to crack,and the cracking of the side of the vibrating screen frequently occurs. The vibration screen cannot operate normally,which seriously affects the daily production of coal preparation plant. According to the structure and working principle of the vibrating screen,after the side of the vibrating screen cracked,the special welding was carried out to deal with the problems in the welding process,and combined with the actual welding effect on the spot,this paper discusses the new repairing technology after the 3 aspects of crack of the screen wall by optimizing the size of the stop hole. After the application of the new welding technology,the cracking accident of the screen wall is reduced obviously,and the effect is remarkable.
2019 S1 v.25 [Abstract][OnlineView][Download 259K]

Research on electrical faults affecting production efficiency of coal preparation plant
LI Jun;CHEN Le;Bulianta Coal Preparation Plant,Shendong Coal Preparation Center;
With the rapid development of coal preparation industry,the competition in the industry is more and more fierce. Production efficiency is one of the key indicators to measure the comprehensive level of coal preparation plant. In order to improve the production efficiency of the coal preparation plant,based on the work experience of electrical equipment maintenance and management,this paper analyzes and summarizes the electrical faults such as power supply system,motor,PLC related,auxiliary equipment operation protection and so on,and provides corresponding solutions,which effectively improves the production efficiency and economic benefits of the coal preparation plant.
2019 S1 v.25 [Abstract][OnlineView][Download 86K]

Research and development on the combination protection of skip chain and break chain of heavy scraper in coal preparation plant
ZHANG Xuegang;Burtai Coal Preparation Plant,Shendong Coal Preparation Center;
In the production process of coal preparation plant,the heavy scraper is an important production equipment in the coal preparation plant. The main cause of the failure is the jump and break of the scraper. This paper introduces the research and development of the combined protection of the broken chain and skipping chain of the heavy scraper,which can judge the occurrence of the fault in advance,realize the effective signal of the protection and stop the machine in time,make the fault be dealt with quickly and avoid the expansion of the fault effectively,reduce the difficulty of fault treatment,and improve the safety performance and production efficiency of the equipment.
2019 S1 v.25 [Abstract][OnlineView][Download 236K]

Research on energy saving and consumption reduction technology of pressure filter system
YAN Jianhua;Shendong Coal Preparation Center;
Aiming at the phenomena of high power consumption and low operation efficiency in the use of pressure filters,combined with the actual operation of domestic pressure filters,according to the current situation of feed pumps,low pressure fans,valve opening,feed size,and daily maintenance of pressure filters,the start-up procedure of pressure filters,the opening of valves,and the pressure of pressure fans are optimized,and the formulation is made. According to the analysis of feed size composition,the installation mode of filter cloth mixing and matching is established. At the same time,the low-pressure fan is semi-automatic upgraded to full-automatic frequency conversion startup. A series of measures and schemes for energy saving and consumption reduction are formulated,and corresponding energy saving technologies or measures are put forward. A GPJ-72 pressurized filter in coal preparation plant runs for one year,saving about1.35 million yuan of electricity per year,which reduces the operation cost of coal preparation plant significantly,thus improving the profit margin of coal preparation plant and achieving the goal of energy saving and consumption reduction.
2019 S1 v.25 [Abstract][OnlineView][Download 97K]

Research on waste heat utilization technology of low pressure fan in coal preparation plant
ZHANG Xinming;Shendong Coal Preparation Center;
In order to reduce the waste of energy consumption and improve mechanical and electrical performance of low-pressure fans in coal treatment plants,and to prevent the recovery of a large amount of residual heat generated by low-pressure fans in Shendong coal treatment plants,which affects the mechanical and electrical performance of equipment,the wind cooling system inside low-pressure fans in coal treatment plants is proposed for transformation. The economic benefits of the residual heat utilization and utilization of the low voltage press are analyzed. The results show that this technology is feasible to use waste heat as a hot bath plan in the workers 'bathroom,which can meet the needs of the factory for bath hot water throughout the year. The annual greenhouse gas emission reduction is 1 102 tons of carbon dioxide,and the annual economic benefit is 718,000 RMB.
2019 S1 v.25 [Abstract][OnlineView][Download 165K]

Exploration and practice of reducing medium consumption in Bulianta coal preparation plant
DONG Liang;Bulianta Coal Preparation Plant,Shendong Coal Preparation Center;
Aiming at the problem of high medium consumption in the production process of the Bulianta coal preparation plant,this paper analyzes the form of medium loss and the factors of medium consumption increasing in detail from technology,management and other aspects,puts forward the rectification plan for the existing problems,and improves the medium removal efficiency through the whole process management of medium acceptance and use,the improvement of the production process effect of the magnetic separator,and the design and installation of the new nozzle of the medium removal screen. As a result,the management of density and liquid level of closed medium barrel and the control of feeding pressure of dense medium hydro cyclone during the washing of fine coal should be avoided,the quality of magnetite powder should be strictly controlled,the control of production management should be strengthened,and the medium consumption should be effectively reduced.
2019 S1 v.25 [Abstract][OnlineView][Download 121K]

Reduction measures of medium consumption of Halagou coal preparation plant
FANG Zhimin;Shendong Coal Preparation Center;
In order to solve the problems of high loss of medium,low recovery of medium and large amount of slime in medium circulation system which existed in lump coal and slack coal system of Halagou coal preparation plant,based on the analysis of the production situation on site,the causes of excessive medium consumption were studied,and equipments like flip-flop screen and banana screen were used to remove power and slime before flotation,to improve system technical process. At the same time,measures such as improving the sculping effect of lump coal and slack coal system sculping screen selectively,improving the medium recovery rate of magnetic separator and perfecting the system medium recovery process were taken to reduce the medium consumption of the plant. After the transformation,coal medium consumption per ton of the bulk coal system was 0.815 kg,t coal medium consumption per ton of the slack coal system was 0.692 kg,and medium recovery rate of the magnetic separator reaches 99.8% above,which made about 0.37 RMB be saved per ton. When the coal quality changed,the medium consumption fluctuation was small,the whole system medium consumption value was stable and was under the value regulated by the state.
2019 S1 v.25 [Abstract][OnlineView][Download 93K]

Study on key indicators system of coal quality management
CUI Gaoen;Coal Industry Opearation Management Center,CHN Energy;
Taking the integrated industrial chain of coal production,transportation,storage,sales and burning of national energy group as an example,this paper analyzes the management of coal product quality in the integrated operation enterprises,applies the comprehensive quality management method and the excellent quality management evaluation method,pays attention to the connection of quality management between the upstream and downstream units of the industrial chain,and deeply studies the key indicators of coal product quality management Based on the ISO quality management system,excellent quality evaluation criteria,advanced and effective coal quality management process,equipment implementation,application of new technology and comprehensive and smooth information system platform,the key index system of total quality management covering the whole industrial chain of the group company is established to better promote the quality of coal products and maximize the overall benefit of the enterprise Creativity. At the same time,combined with the development of quality management system,the application of new technology,new equipment and information network technology,the paper puts forward new prospects for the improvement and extension of the index system in the future.
2019 S1 v.25 [Abstract][OnlineView][Download 86K]

Study on improving quality and efficiency of commercial coal
YE E;ZHOU Ruitong;Shendong Coal Preparation Center;
in order to actively implement the national industrial policy and fully release the high-quality production capacity,according to the specific requirements of the two-level companies of the national energy group,Shendong Coal Preparation Center focuses on the work of " improving the quality of commercial coal and increasing the output of varieties of coal". According to the characteristics of the coal preparation plants under its jurisdiction,it organizes production scientifically,subdivides the product structure,optimizes the production process,increases scientific research,and strengthens the internal management and so on to improve the quality and efficiency of commercial coal. In the first half of the year,the gross calorific value of commercial coal in Shendong Coal Preparation Center completed 22.94 MJ/kg,which improved the quality by 142 k J/kg compared with the same period in history. The output of coal varieties completed 18.27 million tons,which increased by 3. 4 million tons compared with the same period in history. The economic benefit was nearly 1 billion yuan,which achieved good effect of quality and efficiency.
2019 S1 v.25 [Abstract][OnlineView][Download 81K]

Study on economic management mode of state-owned coal preparation enterprises under the new situation
LIU Dianli;Shendong Coal preparation Center;
At present,the situation of production and operation of some state-owned coal preparation enterprises is not optimistic. In the face of complex and changeable production environment,state-owned coal preparation enterprise group should continuously innovate their economic management mode to adapt to the fierce competitive market,so that they can take the initiative in the market and achieve longterm development. The paper studies the economic mode of coal preparation enterprises,introduces the meaning of economic management of coal preparation enterprises,analyzes the current situation of economic management mode of coal preparation enterprises,puts forward some suggestions on the innovation of economic management mode of coal preparation enterprises in the new period,and predicts the development trend of economic management mode of coal preparation enterprises in the new period. The state-owned coal preparation enterprises need to innovate the concept of economic management,strengthen their financial management and internal control,make full use of advanced digital information management technology,and perfect their economic management system so that our country coal preparation enterprise can obtain better development and economic benefit,and promote the sustainable development of state-owned coal preparation enterprise.
2019 S1 v.25 [Abstract][OnlineView][Download 80K]

Improve and upgrade coal enterprises by increasing quality & efficiency
XU Yan;Accounting Center,Shengong Coal Grup;
Economy of China has shifted from a high-speed growth to a high-quality based phase of development. Quality must be first and efficiency must be prioritized. Supply-side structural reforms should be the main line,and quality& efficiency reforms of the economic must be promoted. As a coal company,with the continuous implementation of the national policy of capacity reduction,It is urgent to explore new development opportunities. With a clear recognition of the situation,this paper is based on the practical problems faced by production and operation management. Starting from the analysis of the importance of improving quality and efficiency,closely around the concept of " products create value",this paper mainly discusses how the enterprise should take the market as the guide,take the profit as the center and ask for the benefit from the management. On this basis,how to improv the product market competitiveness,promote the transformation and development of the company and actively seek new profit growth are discussed. And enterprise transformation,scientific and technological innovation,and production safety are expounded. Under the new development situation,coal enterprises should improve quality and efficiency,strive to achieve optimization and upgrading,and constantly improve their ability to resist risks. Only in this way can the healthy,stable and sustainable development of enterprises be realized in the new era.
2019 S1 v.25 [Abstract][OnlineView][Download 88K]

Effect of coal preparation plant quota system on cost reduction and efficiency
YANG Yanbin;WANG Yan;Shendong Coal Preparation Center;
In order to further improve the economic benefit of coal preparation plant and reduce the operating cost,three key indexes of material,energy consumption and labor are selected to carry out the research of quota system. By adopting the method and means of quota management,three quota systems of coal preparation plant are established.To formulate Material quota by combining moving weighted average cost quota with quantity quota,to maximize the output of unit energy consumption of equipment,to optimize the configuration of each system as the principle,according to raw coal quality data and process parameters and power consumption relationship to formulate energy consumption quota.Manual labor quotas are formulated by classification of management service quotas,equipment patrol quotas,overhaul hour quotas,and loading quotas.Using database software and programming platform,quota management information system is established,and quota is applied to performance assessment and distribution. From the operation effect,it can be concluded that strengthening quota management and application is helpful to improve the management level of coal preparation plant,reduce operation cost and improve economic benefit.
2019 S1 v.25 [Abstract][OnlineView][Download 102K]

Gas analysis and control in original coal bunker
PAN Yuejun;HAO Xiping;LIU Xinju;Shendong Coal Preparation Center;
Aiming at the problem that the gas concentration in the original coal bunker is easy to reach the alarm value,taking the Baode coal preparation plant of Shenhua Shendong group as an example,the characteristics of gas occurrence and emission in the original coal bunker were studied. Minitab 17 was used to analyze the monitoring data of the original coal bunker gas in Baode coal preparation plant,and the characteristics of gas accumulation were obtained. According to the characteristics of gas accumulation,the prevention and control measures of gas are put forward. By analyzing the mean value of gas concentration at each moment,it is found that the gas emission at night is relatively high,so it is necessary to strengthen gas inspection and improve workers' awareness of prevention. Of gas monitoring data in time series analysis,get the gas monitoring data of seasonal index,from the point of seasonal index,summer is the slack season at the original coal gas emission,gas concentration is lower than the average,seasonal and randomness of spring seasonal index is the largest,the seasonal and randomness of the gas concentration is higher than average,the biggest changes in gas emission.
2019 S1 v.25 [Abstract][OnlineView][Download 127K]

Equipment management practice of Shijietai coal preparation plant
BAI Long;Shendong Coal Preparation Center;
In order to strengthen the equipment management of the coal preparation plant and provide guarantee for safe and efficient production,this thesis proposes the equipment management of the coal preparation plant from six aspects: equipment account,equipment inspection,equipment maintenance,equipment lubrication,equipment anti-explosion and equipment protection. The management should carry out from routine maintenance and repair,training and learning,troubleshooting,and maintenance results tracking. Through routine maintenance and overhaul of equipment in the coal preparation plant,management system based on process equipment accounts,equipment maintenance accounts and equipment spare parts is formed. And the daily management and supervision of equipment inspection,lubrication,anti-explosion,and protection inspection are realized. And the corresponding whole process management system is established to realize the efficiency improving management of production equipment of Shijietai coal preparation plant.The safe and efficient production of the coal preparation plant is also ensured.
2019 S1 v.25 [Abstract][OnlineView][Download 85K]

Research on sampling method for single machine inspection in coal preparation plant
CAO Xianchun;BAI Long;Shigetai Coal Preparation Plant,Shengdong Coal Preparation Center;
In order to fully understand the process performance of the production equipment of the coal preparation plant,improve the representativeness of the sample taken,and improve the accuracy of the single machine inspection experiment results,the paper studies the sampling method and sampling process of different equipments,as well as the problems that should be paid attention to when storing coal samples. According to the source of sampling error of coal products,for the selection of sampling points of main error sources,the singlemachine inspection of hierarchical cyclones was taken as an example to study the classification of classification cyclones by different sampling points in the pipeline. The effect of the effect evaluation,using the sieve machine and the belt machine as an example,studied the influence of sampling points and sampling methods on the representativeness of coal samples. The results show that the sampling method,sampling synchronization,sample storage time,and sampling point selection have obvious influence on the single-machine inspection result of the equipment. The selection of sampling points in the pipeline is the main source of error of the experimental results. And whether the whole section is full and the number of samples are the main factors in the sampling error in the coal stream.
2019 S1 v.25 [Abstract][OnlineView][Download 123K]

Information dispatching management of Shigetai coal preparation plant
GAO Xiaoxi;YANG Yongsheng;BAI Long;DOU Hongqing;Shigetai Coal Preparation Plant,Shendong Coal Preparation Center;College of Chemistry &Chemical Engineering,Xi'an University of Science and Technology;
In order to facilitate the production scheduling management and reduce the tedious and repetitive work of the dispatcher's record data,the dispatcher of the Shigetai Coal Preparation Plant has developed the scheduling management system and the overhaul tickets system independently by using the computer software. The dispatching management system of the Shigetai Coal Preparation Plant records and counts all kinds of daily production data for convenient query. Each data can be input at one time for many times and used at the same time,which realizes the integration and sharing of production data of the coal preparation plant. Through the input data,the production rate of each production system can be calculated automatically and the production rate report can be generated automatically. The system integrates and analyzes the data to form a curve to guide the production. Through the comparison of production curve differences,the causes can be found in time and the problems can be rectified. The hidden dangers found in the daily inspection of the equipment are entered into the maintenance work order system,which is convenient for the production workshop to enter,the maintenance workshop to browse,query and view. After the maintenance operation,the production workshop confirms the completion of the maintenance,and the dispatcher is responsible for the review. To form a closed cycle of equipment hidden danger inspection,maintenance and feedback,which not only records maintenance work but also reflects maintenance quality. The information dispatching management is convenient for the daily data records of the dispatchers in the Shigetai Coal Preparation Plant,optimizing the working mode,reducing the workload and effectively improving the work efficiency.
2019 S1 v.25 [Abstract][OnlineView][Download 80K]

Operation and management of 1136 coal preparation plant based on value creation
WANG Bin;LIU Yuhao;SHANG Ming;Bulianta Coal Preparation Plant,Shendong Coal Preparation Center;
In order to maximize the production and operating benefits,aims at the problems existing in the production management of the coal preparation plant,this paper takes the production and operation management process as the research object,and studies the schemes that can realize or support the maximization of the benefit of the coal preparation plant,such as re-safety management,leading by the party construction,intelligent construction,talent leading,etc.,and puts forward the " 1136" operation management mode based on value creation. Guided by party construction,oriented by value creation,to create high efficiency production,high efficiency operation and high quality development. Through the implementation of the operation management program,such as efficiency improvement,cost-reduction,quality improvement,internal marketization,quality standardization,innovation and intelligence,the coal preparation plant is about to achieve high efficiency production,high efficiency operation,high quality development,production annual profit is expected to reach 450 million yuan.
2019 S1 v.25 [Abstract][OnlineView][Download 88K]

Research and practice on value creation management system of Jinjie coal preparation plant
HE Hongwei;AI Xizhao;SUN Yadong;Shendong Coal Preparation Center;
In recent years,Jinjie coal preparation plant has taken"value creation"as its main theme and led by the Party construction to create high-efficiency production value,high-efficiency operation value and high-quality development value as its main line. And it further optimizes the allocation of human,material and financial resources,overall planning to promote Jinjie coal preparation plant highefficiency production,high-efficiency operation,high-quality development.
2019 S1 v.25 [Abstract][OnlineView][Download 87K]

Practice of safety and quality standardization construction in Jinjie coal preparation plant
SUN Yadong;HE Hongwei;LIU Xiufen;Shendong Coal Preparation Center;
With the development of coal market,safety quality standardization is an important part of modern enterprise management,and safety quality standardization is the guarantee of safety production and employee health and happiness. Safety and quality standardization is the basis for enterprises to reduce costs and increase efficiency and make breakthroughs in innovation. In view of the measures taken to solve the problems of equipment aging,rusting and safety management in coal preparation plants due to excessive coal dust,flushing of clean water,vibration of equipment,etc.,the paper discuss how to create a first-class coal preparation enterprises with a healthy and comfortable working environment.
2019 S1 v.25 [Abstract][OnlineView][Download 370K]

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