Clean Coal Technology

2021年S1期目次

Optimization practice of production system in Shangwan Coal Preparation Plant
WANG Zhenlong;TIAN Yanfeng;ZENG Hongjiu;CHN Energy Shendong Coal Preparation Center;
In order to solve the system restriction bottleneck of Shangwan Coal Preparation plant and improve production efficiency and product quality, according to the changes of raw coal quality and commercial coal quality, the problems existing in each link of the production system and targeted system optimization were carried out.Through the optimization of raw coal classification, crushing, sorting and commercial coal precipitation, reduce the lower limit of lump coal separation, product moisture, system failure rate and production cost, improve production efficiency and product quality, and achieve the purpose of double improvement of production efficiency and product quality.After the transformation, the classification efficiency of raw coal is increased from 75% to 92%,the production continuity is enhanced, the production efficiency is increased by about 2%,the washing rate is increased by about 2.5%,the product quality is improved by about 0.3 MJ,the annual production cost can be saved by 360 000 yuan, and the effect of quality improvement and efficiency increase is obvious.
2021 S1 v.27 [Abstract][OnlineView][Download 158K]

Analysis and optimization of final coal separation system in Bulianta Coal Preparation Plant
WANG Bin;Shendong Technology Research Institute;
Taking the final coal system of Bulianta Coal Preparation Plant as the research object, the advantages and disadvantages of the process flow of the final coal separation system was analyzed, and the optimization scheme of the process flow was put forward.Through the analysis of the problems existing in the production of the final coal system, the feasible solutions was put forward.Through a series of transformations, the problems existing in the system was sloved,to realize the maximization of the production capacity of the coal preparation plant and improve the enterprise economic benefits.
2021 S1 v.27 [Abstract][OnlineView][Download 123K]

Optimization and production practice of flotation process in Buertai Coal Preparation Plant
NIU Chao;ZHAO Le;Buertai Coal Preparation Plant,Shendong Coal Preparation Center;
In order to ensure the smooth commissioning of the coal slime flotation demonstration project in Buertai Coal Preparation Plant, the production technology was optimized.The ash content of flotation cleaned coal is less than 8%,the amount of collector is reduced by 1.01 kg/t dry slime, and the amount of foaming agent is reduced by 0.11 kg/t dry slime.Better flotation process optimization results are obtained, which slays a solid foundation for the flotation concentrate of coal slime to be used as raw material of CWS in the next stage.
2021 S1 v.27 [Abstract][OnlineView][Download 240K]

Slurriability and stability of coal water slurry prepared with Halagou coal
TIAN Yi;TU Yanan;WANG Lei;CHN Energy Shendong Coal Preparation Center;School of Chemical and Environmental Engineering,China University of Mining and Technology-Beijing;
Low-rank coal is a high-quality power and chemical coal,and it is an important direction for clean utilization of low-rank coal to prepare it into coal water slurry (CWS).However,the characteristics of high water content,abundant oxygen-containing functional groups and developed pores seriously affect the concentration of CWS.To improve the reachable concentration of low-rank coal and realize the efficient and clean utilization of low-rank coal resources,particle size grading technology was used to carry out pulping tests on Halagou long-flame coal,and Turbiscan LAB stability analyzer was used to analyze the stability of slurry under static and centrifugal force fields.The results show that the dispersant dosage was 1.2%,the lowest apparent viscosity of CWS obtained due to the particle surface adsorption makes particle dispersant hydrophilic,form hydration film to achieve“lubricating”the effect of viscosity,the dispersant is insufficient,cannot form the stability of the particle surface hydration membrane structure,and dispersant dosage exceeds the best dose the multilayer adsorption,reduces the system the content of free water caused the increase of apparent viscosity.The concentration of CWS increased linearly with the increase of packing ratio,this is due to the increase in the concentration of water and coal slurry,the proportion of free water in the slurry acting as a dispersion medium gradually decreased,coal-like solid particles between the chance of collision increased,particle movement resistance increased,and thus make the surface viscosity of the slurry increased.When the accumulation efficiency evaluation index reaches 87.63%and the drug dose is 1.2%,a fixed viscous concentration of 61.00%can be produced.When analyzing the stability of the slurry,it was found that the I_(TS)value of the slurry stability was still not more than 0.2 under the condition of 20 days of sit-in.Centrifugation can speed up the process of instability,and with the increase of centrifugation force,the system instability speed and the final I_(TS)value are higher.The process of"slowing down"in centrifugal instability of water and coal slurry is the gradual extrusion system of the previous system compression,so that soft precipitation gradually changes to hard precipitation,and then"rising rapidly again"is the process of generating hard precipitation,from"slowing down"to"rising rapidly again"centrifugal action time is about 10 min.
2021 S1 v.27 [Abstract][OnlineView][Download 232K]

Improving quality and efficiency based on technological innovation in Baode Coal Preparation Plant
BAI Fuqiang;WANG Zhenlong;CHN Energy Shengdong Coal Preparation Center;
In order to improve quality and efficiency, Baode coal preparation plant has carried out a lot of technological innovation, including process innovation, application of new equipment, promotion of small transformation and small invention, which effectively ensures the completion of coal quality indicators of the coal preparation plant, creates considerable benefits, realizes energy conservation and consumption reduction, and reduces human, material and financial investment.In the future work, Baode coal preparation plant has formulated three working ideas and directions: Taking the mass line of technological innovation, promoting from automatic coal preparation to intelligent coal preparation, strengthening the training and exploration of technical talents.
2021 S1 v.27 [Abstract][OnlineView][Download 354K]

Gas coal production process optimization and system reform in Baode Coal Preparation Plant
LIU Qinju;CHN Energy Shengdong Coal Preparation Center;
In order to make full use of the characteristics of Baode coal, based on the analysis of the demand for gas coal in the coke market, the selectivity of raw coal, and the limitations of existing production systems, the coal washing and processing center proposed a scheme to optimize the process and produce gas coal products.The program focused on solving the problems of overcoming the limitations of existing systems and achieving efficient and stable output of gas coal.Based on theoretical analysis, the theoretical yield of gas coal products extracted from raw coal at 25 to 0.5 mm is 11.34%.The modified gas coal system process adopts a two-stage decanting process.After the system was reformed, the trial operation was carried out well, and the quality of the cleaned coal products were successfully produced.The research shows that when the amount of washing is 320 t/h, the gas coal yield is up to 2.5%,and the annual economic benefit after the transformation is 65.38 million yuan, which lays a practical foundation for the transformation and development of the coal preparation plant.
2021 S1 v.27 [Abstract][OnlineView][Download 303K]

Improving the ehydration efficiency of slime centrifuge
SU Jian;CONG Rihong;CHN Energy Shendong Coal Preparation Center;
The current situation of high moisture in coarse slime in coal preparation plant was analyzed from the current treatment situation of coarse slime centrifuge and the whole slime system.Through detection, evaluation and transformation, the dewatering effect of slime centrifuge was ensured, and a more efficient coarse slime dewatering treatment scheme was obtained.
2021 S1 v.27 [Abstract][OnlineView][Download 111K]

Optimization practice of improving quality and efficiency of slime system
LI Xiaopeng;Yujialiang Coal Preparation Plant,CHN Energy Shendong Coal Preparation Center;
Slime water system is a key link in the production of coal preparation plant.The system management level directly affects the production efficiency, washing rate, washing cost and other key indicators of the whole system.To improve the quality and efficiency of slime system and solve management and technical problems existing in slime water system are the main topics faced by coal preparation plant.The No.1 main washing coarse slime recovery system of Yujialiang coal preparation plant of the washing center originally adopted high-frequency sieve dehydration, and the product had high moisture content.Through the optimization and transformation of the process flow, a new set of a screen and scraper discharge centrifuge are added in the coarse slime recovery process to dehydrate the coarse slime, significantly reduce the product moisture, improve the quality of commercial coal and obtain good economic benefits.
2021 S1 v.27 [Abstract][OnlineView][Download 133K]

Research and application of slime reduction and upgrading technology
LI Ningtao;CHN Energy Shendong Coal Distribution Center;
The geological conditions of Wulanmulun mine worsened, and the slime in the slime water system could not be treated, which led to the exit of the slime water system.In order to maximize the discharge of gangue slime from the slime water system, reduce the production cost in the heavy medium coal preparation process, improve the quality of coal products, and ensure the normal operation of the slime water system, slime reduction and upgrading technology was researched.Combined with the actual process of coal preparation plant, the arnount of sline and balance poiat of slime in and out are defined through the use of high-frequency screen to discharge the underflow of concentration pool, adding 10 mm fine coal pre pulverization process, the underflow of concentration pool high ash sludge to be discharged into the well and other ways.It ensures the normal operation of slime water system and achieves the dual purpose of reducing cost and improving quality and efficiency.
2021 S1 v.27 [Abstract][OnlineView][Download 241K]

Optimization of lump coal separation system at Yujialiang Coal Preparation Plant
LI Jie;Yujialiang Coal Preparation Plant,Washing Center of National Energy Investment Group Co.,Ltd.;
Taking the lump coal separation system of Yujialiang coal preparation plant as the research object, the advantages and disadvantages of the system process were analyzed, and solutions were put forward through the analysis of the problems encountered in the actual production of the lump coal system.Through the improvement of the system, the existence of the system is solved.Some of the problems have reduced production costs and improved the economic benefits of the coal preparation plant.
2021 S1 v.27 [Abstract][OnlineView][Download 165K]

Optimal design and practice of medium system in Buertai Coal Preparation Plant
SHEN Feifei;ZHAO Le;Shendong Project Cost Management;Buertai Coal Preparation Plant,Shendong Coal Preparation Center;
In order to solve the problems of high dielectric consumption and unstable product quality in the heavy dielectric sorting system of Buertai coal processing plant, the guidance and goal of intellectualization of dense medium separation process was put forward.Through optimizing and reforming the process of adding dielectric link, dielectric powder recovery and purification of the heavy dielectric system, the dielectric consumption of tons of coal is reduced by 0.02 kg/t and the qualified rate of variety coal is increased from 98.27% to 99.44%.
2021 S1 v.27 [Abstract][OnlineView][Download 240K]

Optimization and transformation of heavy medium separation system in Buertai Coal Preparation Plant
CHEN Jianjun;Buertai Coal Preartion,CHN Energy Shendong Coal Preparation Center;
This paper is aimed at the actual production status of Buertai Coal Preparation Plant, which is caused by large fluctuation of density and liquid level of heavy medium system, high medium consumption per ton of coal and poor separation effect, aiming at the intelligentization of the heavy medium separation process, a series of optimization and transformation were carried out on the desliming effect of the heavy medium separation system, the control of the diversion amount, the recovery and purification of the medium, the water used for the removal of medium and the density automatic control system.The operation and control targets of reducing the medium consumption per ton of coal by 5%,increasing the recovery rate of cleaned coal by 2% and increasing the product stability rate by 3% were achieved.
2021 S1 v.27 [Abstract][OnlineView][Download 216K]

Research on main flotation factors of Buertai Coal Preparation Plant
ZHAO Le;Buertai Coal Preparation Plant,Shendong Coal Preparation Center;
According to the situation of the clean energy strategic layout of the National Energy Group, the clean and efficient utilization of coal is an inevitable trend.Based on the above background, Shendong Coal Group proposes the research and development project of high-quality utilization of coal slime flotation for ash reduction and desulfurization.Raw coal of Buertai Coal Preparation plant is long flame coal, non-stick coal, gangue easy to slime.Flotation industrial test was carried out.By changing some parameters in flotation test, the main factors affecting flotation effect were analyzed.The results show that the float-ability of slime is poor, and the dominant size of slime water is <0.074 mm.When the amount of collector is 2.7 kg/t and the amount of foaming agent is 3.0 kg/t dry coal slime, the flotation effect is better, and the flotation perfection index is 36.71%.The use of compound collector can obviously reduce the foaming agents amount.When the circulating pump frequency is 45 Hz, the flotation effect is the best.
2021 S1 v.27 [Abstract][OnlineView][Download 149K]

Study on ash and sulfur distribution of coal at the sorting interface of spiral sorter
ZHAO Huanyu;LIU Qinju;CHN Energy Coal Preparation Plant of Shendong Coal Company;
In order to make full use of the resource endowment and optimize the product structure, the fixed-point and fixed-distance section sampling method was used to study the distribution of ash and sulfur at the flow film interface at the discharge end of the spiral separator. At the discharge end, the spiral separator has formed a stable flow film separation layer. The material was sampled and tested every 30 mm from the inside out, perpendicular to the direction of fluid movement. The test results show that the ash content of the spiral separator product at the separation flow film interface first decreases, then rises and then decreases from the inside to the outside, and the product sulfur content first rises and then decreases at the separation flow film interface from the inside to the outside. If it increases again, the distribution of ash and sulfur has a high degree of symmetry. According to the experimental results, the interceptor was designed, the position of the interceptor was adjusted reasonably, and the ash content of spiral clean coal was reduced by 0.2%.
2021 S1 v.27 [Abstract][OnlineView][Download 160K]

Optimization of chemical dosing based on high ash fine peat slime water treatment
GAO Xiaoxi;DOU Hongqing;College of Chemistry & Chemical Engineering,Xi′an University of Science and Technology;Shendong Coal Preparation Plant;
In order to solve the problem that the deterioration of slime water system restricts the improvement of end coal washing rate, Shigetai coal preparation plant of Shendong Coal Preparation Center starts with the addition of reagent in the concentration tank to solve the problem of poor slime settlement effect.The improvement of dosing points, adjustment of reagent system and combination of reagents have achieved obvious results.The washing rate of end coal has increased by 8%,and the slime water system operates normally.There is no blackening of circulating water in the concentration tank due to poor quality of raw coal and difficult settlement of high ash fine mud, affecting the washing rate of end coal system or reducing the washing rate of fine coal.
2021 S1 v.27 [Abstract][OnlineView][Download 106K]

Analysis on desliming effect of secondary pulping with ARC screen
ZENG Hongjiu;LIU Qinju;WANG Zhenlong;CHN Energy Shendong Coal Preparation Center;
With the increasingly high demand for coal in the market, it is difficult to ensure the profit of coal preparation plant by relying on a single type of coal.Baode Coal Preparation Plant optimizes the process system according to its own coal endowment and combined with the current process status to produce coking and coal blending with higher profit value.The screw separator of Baode coal preparation plant contains about 25% coking coal with recovery value, so the coking coal blending products are mainly final cleaned coal and spiral cleaned coal.The cleaned coal ash separated by spiral separator is about 21%-23%.After dehydration and desliming through arc screen, the spiral cleaned coal ash decreases to about 18%.The low dehydration and desliming efficiency of arc screen leads to a large number of high ash fine mud in spiral cleaned coal, affecting the ash content of products.The ash content of the final cleaned coal is about 8%.In order to ensure that the ash weighted value of the mixed product of spiral cleaned coal and final cleaned coal is less than 10%,two water jets are arranged on the screen surface of the arc screen to conduct secondary pulping and desliming of the dehydrated material on the screen, strengthen the dewatering and desliming effect, so as to further reduce the ash content of spiral cleaned coal and stabilize the product quality index.
2021 S1 v.27 [Abstract][OnlineView][Download 256K]

Research and application of pulverized coal removal project in Shigetai Coal Preparation Plant
DOU Hongqing;GAO Xiaoxi;HE Yuanfeng;School of Chemistry and Chemical Engineering, Xi′an University of Science and Technology;CHN Energy Shendong Coal Preparation Center;
With the gradual deterioration of raw coal quality and the continuous improvement of selection rate, the content of slime in the production system of Shigetai Coal Preparation Plant is increasing, and the problem of slime water treatment has become the bottleneck of restricting safety production.In order to change the current operation status of wet desliming process and eliminate the adverse impact of excessive slime on the production system and the final commercial coal quality, the existing raw coal classification screen was used to carry out dry desliming transformation before separation in Shigetai Coal Preparation Plant.The material under the raw coal classification screen was divided into the prescreen section and the post screen section, and the particle size composition of the two sections was compared and analyzed to determine the position of the de milling section.After the transformation, the anti blocking property of the chute under the raw coal classification screen is improved, the labor intensity is reduced, the production efficiency is improved, the washing amount of pulverized coal and the calorific value of commercial coal are increased, and the pressure of slime water system is reduced.
2021 S1 v.27 [Abstract][OnlineView][Download 137K]

Fault analysis and system transformation of rapid loading system
MA Zhijun;Yujialiang Coal Washing Plant,Shendong Coal Preparation Center;
By expounding the control principle of rapid loading system, combined with the problems encountered in field production, the common electrical hydraulic faults of loading system were analyzed, and improvement suggestions were put forward.The early warning and alarm protection is designed to prevent the "crushing" accident of the belt conveyor.No.2 drive motor is exited or input in real time to eliminate the power waste of main transport motor.Three position four-way solenoid valve of the gate of 530 quantitative bin is changed to two position four-way solenoid valve to completely eliminate the hidden danger of coal scattering.The running time of belt conveyor holding brake device is reduced from 80 min to 20 s, which completely eliminates the waste of power consumption and reduces the wear and maintenance of components.
2021 S1 v.27 [Abstract][OnlineView][Download 154K]

Research on automatic spraying system for antifreeze in coal preparation plant
WANG Jiali;CHN Energy Shendong Coal Processing Center;
Combined with the application status of the antifreeze spraying system of coal preparation plant, the antifreeze spraying system was modified, the spraying device of loading chute was added, the antifreeze spraying frame and lifting mechanism were designed and improved, and the electric control system was optimized.The environmental protection problems about antifreeze were studied to solve the problem of antifreeze vehicles and environmental impact.The economic and social benefits are significantly improved.
2021 S1 v.27 [Abstract][OnlineView][Download 194K]

Application of multi-energy spectrum coal quality on-line analyzer in coal blending test of Shangwan Coal Preparation Plant
TIAN Yanfeng;ZHANG Xinyuan;CHN Energy Shendong Coal Preparation Center;
This paper introduced the production process, coal quality characteristics and coal blending system of Shangwan Coal Preparation Plant, and analyzes the feasibility and economic benefit of implementing precise coal blending.Based on the data of multi-energy spectrum on-line coal quality analyzer, the coal blending experiments of two steel plants were completed by pre-testing the materials entering the warehouse and calculating the blending proportion.The test results show that the actual ash content of coal blending after trial combustion of coal in two steel plants has reached the expected effect.By comparison and analysis, it is found that the multi-energy spectrum on-line analyzer for total elements in coal has higher precision for ash, moisture, total sulfur and calorific value detection, and has certain reference significance for on-line detection of ash components in coal, the real-time display of coal blending process is realized with coal quality data, and the precision reaches the requirement.
2021 S1 v.27 [Abstract][OnlineView][Download 366K]

Optimization and transformation of rapid loading system
TIAN Baoxiong;GAO Li;CHN Energy Shendong Coal Preparation Center;Shendong Education and Training Center;
China′s coal consumption land is far from coal production land.The timeliness of coal transportation has a very obvious influence on the economic development of the industry.At this stage, in the link of rapid loading system, the loading efficiency has not been very high, and it is difficult to maintain the high efficiency of coal transportation.How to effectively improve the loading efficiency has become an important research topic that the coal industry should consider.This paper studied the existing rapid loading system of coal preparation plant, mainly improved and optimized the relevant implementation measures according to different loading links, explored the scheme improvement mode of the overall loading function through the systematic analysis of the loading process, studies the hardware and software design mode of the rapid loading system, and introduces the radio frequency identification technology.Using PLC to carry out systematic optimization and transformation research will bring better technical support for the development and upgrading of coal rapid loading.
2021 S1 v.27 [Abstract][OnlineView][Download 257K]

Optimization and application of sealing mode of heavy slurry pump in Bulianta Coal Preparation Plant
TIAN Na;BAI Liugui;HE Yongbin;Bulianta Coal Preparation Plant,CHN Energy Shendong Coal Preparation Center;
In order to prolong the service life of the heavy-medium centrifugal pump and reduce the sudden failure rate, the causes of rapid damage to the bearing components and shaft sleeves of the heavy-medium centrifugal pump at Bulianta Coal Preparation Plant were studied. Based on the single-factor solution of the existing problems, an optimization scheme for the sealing method of the dense-medium centrifugal pump at Bulianta Coal Preparation Plant was proposed. The results show that the use of the rubber skeleton lip-shaped sealing method to optimize the plan, the sealing effect is good, the equipment operation process is stable, the pump components and the shaft sleeve use cycle is extended from the original 6 months to 36 months, which greatly reduces the maintenance cost and saves every year. The cost is 3 161 700 yuan.
2021 S1 v.27 [Abstract][OnlineView][Download 200K]

Research on rapid circulation of lubricating oil in positive and negative screw compressor
BAI Xiaoping;Yujialiang Coal Preparation Plant,CHN Energy Shendong Coal Preparation Center;
In order to explain the control principle of cooling system for positive and negative screw compressor, the path of lubricating oil and the reason of lubricating oil without quick circulate in winter, the scheme of improving the ambient temperature for positive and negative screw compressor in winter was discussed, and fan operation mode of cooling system was reformed to ensure the oil supply of head for positive and negative screw compressor.Thus, the problems encountered in actual production are solved and the production efficiency is improved.It is conducive to further improve the rapid circulation of lubricating oil for positive and negative screw compressor.
2021 S1 v.27 [Abstract][OnlineView][Download 305K]

A jet type automatic medium adding system
XING Huan;ZHOU Zenghong;CHN Energy Shendong Coal Preparation Center;
The design and installation of the automatic adding system is the main part of intelligent construction of coal preparation plant.Generally, the medium addition of coal preparation plant is carried out by manual or grab, with low medium adding efficiency and high labor intensity.Moreover, the adding position is required to occupy the human resources of coal preparation plant.This paper mainly discussed the jet jet device and concentrated media barrel in a jet jet automatic media adding system by studying the factors of the field media properties and the operation mode of the medium adding system.The important parameters and the notes for operation and test of the automatic medium adding system were explained, This paper expouned a new automatic media adding method, and through the analysis, it obtained the advantages of the automatic media adding system and the economic benefits for the enterprise.
2021 S1 v.27 [Abstract][OnlineView][Download 312K]

Application of scraper scale metering system in Shigetai Coal Preparation Plant
QIAO Xiaoli;ZHANG Tao;Shigetai Coal Preparation Plant,Shendong Coal Group;
Scraper scale measurement system refers to the use of scraper transport aircraft, speed sensors, weighing display control instruments and plate weighing sensors to measure, reduce the error in measurement, improvd the accuracy of measurement, and provide accurate source data for the production needs of coal Mills.The paper systematically summarized the reasons for the measurement error and proposed a solution.The Shigetai Coal Preparation Plant introduced the application of the scraper scale measuring system in the coal preparation plant.The development of the scraper scale measuring system in other fields was also expected.
2021 S1 v.27 [Abstract][OnlineView][Download 152K]

Intelligent monitoring of overload and eccentric load of coal rapid loading
LI Yanfei;CHN Energy Shendong Coal Preparation Center;
With the development of economy and the continuous growth of railway transportation, the phenomenon of overload and eccentric load of coal rapid loading is very serious, which seriously restricts the safety of train operation.Based on the shortcomings of the existing freight train overload and partial load detection system, the current mechanized loading workflow and lidar three-dimensional imaging and monitoring technology, the surface, volume and shape of empty/full vehicle geometric images were analyzed and calculated.One time data acquisition was used to solve the problem of "partial loading, incomplete unloading, overload and underload", and the overload and partial load detection system based on imaging method and lidar was analyzed. Therefore, a set of method combining real-time video image monitoring technology and non-contact three-dimensional imaging technology is proposed to realize the intelligent monitoring of coal rapid loading effect.
2021 S1 v.27 [Abstract][OnlineView][Download 315K]

Design and research of electromagnetic adsorption technology in adding media system
LI Peiqi;BAI Long;CHN Energy Shendong Coal Preparation Center;
Aiming at the problems of low automation, high labor intensity, inaccurate measurement, and low efficiency of the medium powder addition system in the heavy medium coal preparation plant, the common heavy medium separation process, medium recovery system and addition process were analyzed, and electromagnetic adsorption technology, sensor recognition technology and equipment automatic control technology were integrated as an intermediary system.Solve the problem that the original magnetite powder cannot be added automatically.That only need to manually input the adding quality to automatically complete the whole process of adding magnetite powder, without manual operation again; solve the workload of adding magnetite powder in the coal preparation plant.The problem of large, labor-intensive, and low work efficiency; at the same time, the problem of accurate measurement of the addition of magnetite powder in the coal preparation plant is realized, which not only ensures the amount of addition meets the requirements, but also avoids the waste caused by excessive addition.It can be achieved monthly by cooperating with database management.The statistical function of the annual total amount of mediation.
2021 S1 v.27 [Abstract][OnlineView][Download 171K]

Electromechanical management promotion strategy in Shendong Coal Preparation Center
ZHANG Xinming;CNH Energy Shendong Coal Preparation Center;
In order to strengthen the mechanical and electrical management Shendong Coal Preparation Center, and improve the mechanical and electrical management level of the coal preparation plant, the mechanical and electrical management improvement system was constructed from four aspects of mechanical and electrical basic management, information management, mechanical and electrical team construction and mechanical and electrical incentive, so as to realize the whole process management and control of mechanical and electrical, improve the efficiency of mechanical and electrical management, reduce the failure rate of equipment, and build a world-class demonstration specialization sheet for the high-quality development of the enterprise provides basic support.
2021 S1 v.27 [Abstract][OnlineView][Download 95K]

Practice of improving efficiency of scraper conveyor
NAN Chaoyun;CHN Energy Shengdong Coal Preparation Center;
The scraper conveyor, as a multi-point feeding and discharging(mixing),low-cost transportation tool, has become the main transportation equipment of the coal preparation system.With the continuous improvement of the production capacity of coal preparation plants, the performance of the scraper conveyor directly affects the safe and efficient operation of the production system.Aiming at the design defects and common failures of the scraper conveyor in the coal preparation plant, the coal transportation process, box structure, equipment protection, operation management and other aspects of the scraper conveyor were analyzed, and optimization measures were proposed in combination with production practice to realize the high output and high efficiency of the scraper conveyor, provide a reference for the optimization and upgrade of the scraper conveyor of coal preparation enterprises.
2021 S1 v.27 [Abstract][OnlineView][Download 214K]

Design and evaluation method of a loading quality inspection device
HE Liming;LI Peiqi;BAI Long;WANG Bin;CHN Energy Shendong Coal Preparation Center;
In view of the problems of the partial load of powdery materials in railway transportatio, lag of superelevation detection unable to guide the loading in time and the inaccuracy of coal left on the side of the car by manual observation, five on-line laser rangefinders were used to detect the upper surface of loading materials and the height of car side based on the height of the detection frame controlled by the hydraulic cylinder and the horizontal position of detection frame by the hydraulic motor, and the roof surface was modeled and analyzed.The detection and evaluation of loading quality were realized.Analysis of coal density indirectly reflects the calorific value and bulk density of coal, which is convenient to guide the actual production.
2021 S1 v.27 [Abstract][OnlineView][Download 262K]

Analysis on energy-saving optimization and application of belt conveyor in Bulianta Coal Preparation Plant
BAI Liugui;Bulianta Coal Preparation Plant,CHN Energy Shengdong Coal Preparation Center;
In order to improve the operating efficiency of the belt conveyor, reduce the maintenance and maintenance cost of the belt conveyor, reduce the frequency of electrical and mechanical failures, and ensure stable production operation, according to the current status and type of the belt conveyor in use at the Bulianta Coal Preparation Plant, its diagnosis and analysis were proposed.The improvement of the belt conveyor tensioning method, the withdrawal or merging of the transfer belt conveyor, and the improvement of the upper storage belt conveyor speed improvement were reformed.Firstly, transform the central weight tensioning device of the 10 transfer belt conveyors in the screening workshop into a tail screw tension device; secondly, add a chute to the large coal transfer belt conveyor in the screening workshop and withdraw from the belt conveyor.Secondly, extend the tail of the 503 upper silo belt conveyor to the original 337 reprinted tape conveyor, remove the original 337 tape conveyor, and realize the combined transformation of the 503 and 337 conveyors.Finally, the belt speed of the 507 upper silo belt conveyor is increased transformation.Through the efforts to explore the above four aspects of the belt conveyor in the past two years, the transformation and optimization of 13 belt conveyors in the Bulianta Coal Preparation Plant have been realized, including a belt conveyor that was removed and a belt conveyor that was withdrawn, reaching 30 times of demolition.Two reversing rollers, the power is reduced by 139.5 kW,the speed improvement of the 507 upper storage belt conveyor increases the conveying capacity from 1 100 t/h to 1 600 t/h, the variety of coal has achieved a large increase in energy saving and consumption reduction, and the failure rate and maintenance of the belt conveyor have been reduced.The purpose of personnel maintenance.
2021 S1 v.27 [Abstract][OnlineView][Download 773K]

Practice of reducing medium consumption in Daliuta Coal Preparation Plant
SHI Yawen;ZHANG Lei;KANG Xuegang;Daliuta Coal Preparation Plant,CHN Energy Shendong Coal Preparation Center;
In order to reduce the medium consumption of shallow trough dense medium and fine coal dense medium cyclone separation system, the factors influencing medium consumption, such as the operation status of magnetic separator, the structure of de-medium screen, the use effect of fixed screen, the opening and closing degree of shunt and the water quality of spray water were systematically analyzed.It is found that the average recovery rate of magnetic material of magnetic separator of terminal coal system is lower than 99.80%, the inclination angle of the screen surface of the desmear screen of terminal coal phase II is large, the fixed screen of terminal coal phase II and big well system has blockage and uneven material distribution, the diversion of terminal coal and big well system exists to open big combination, the water quality of circulating water is not guaranteed, and the media pipeline valve has running and dripping problems.Therefore, stabilize the magnetic separator feed, strengthen the magnetic separator unloading media, reduce the gangue deintermediate screen thin media section gangue screen slit, strengthen the screen plate inspection, etc., so that the magnetic separator recovery efficiency is guaranteed.At the same time, baffles were installed at the inlet and large inclination screen surface of the second stage of the final coal desmear screen to reduce the speed of the material, two water barriers were installed at the discharge end, and the inspection of the fixed screen was strengthened and the angle of the screen surface of the second stage of the final coal fixed screen was changed. By strengthening the control of circulating water and reasonably adjusting the dosing parameters according to the concentration of coal sludge water, the dielectric consumption of the big well system was further reduced to 0.30 kg/t and the dielectric consumption of the final coal was reduced to 1.21 kg/t.
2021 S1 v.27 [Abstract][OnlineView][Download 132K]

Practice of energy saving and consumption reduction in Bulianta Coal Preparation Plant
LI Jun;Bulianta Coal Preparation Plant,CHN Energy Shendong Coal Prepuration Center;
In order to further improve the economic benefits of the coal preparation plant, in view of the energy consumption problems existing in the coal preparation plant of the supplementary connecting tower, the energy consumption is reduced by means of optimization, transformation and management of the production system, power supply and distribution system and upper computer program, and the annual production cost is saved by 7 million yuan.
2021 S1 v.27 [Abstract][OnlineView][Download 97K]

Energy-saving and consumption-reducing measures and application of washing center during the 14th five-year period
LI Guofeng;CHN Energy Shendong Coal Preparation Center;
In order to respond to the national call to achieve dual control of energy consumption in the washing center, and to achieve an energy-saving enterprise, the energy saving and reduction of coal preparation plants in the washing center were analyzed from the four aspects of equipment efficiency, production efficiency, process influence, and management factors.For the problems and difficulties in terms of energy consumption, measures such as equipment replacement, equipment protection optimization, production efficiency improvement, start-up and shutdown optimization, compressor working conditions improvement, and slime reduction were adopted for energy-saving management and control.The dual control of energy consumption in the washing center has shown a downward trend year by year, achieving an energy-saving enterprise.
2021 S1 v.27 [Abstract][OnlineView][Download 206K]

Discussion on reducing medium consumption in heavy medium coal preparation plant
ZHANG Lei;SHI Yawen;KANG Xuegang;ZENG Hongjiu;CHN Energy Shendong Coal Preparation Center;
In order to provide some method reference for further reducing medium consumption, the necessity of reducing medium consumption from the perspective of economic benefits was demonstrated, the methods of reducing medium consumption from the aspects of management and technology were discussed. It is discussed from three aspects: from the perspective of economic benefits, the medium has a great impact on coal ash, and reducing medium consumption can increase economic benefits; The maintenance management is in place to ensure the normal operation of the equipment and the protection of the equipment from misoperation, which can reduce the medium consumption; Maximizing the recovery of qualified suspension, intercepting medium and recovering medium are the main technical means to reduce medium consumption. Maximizing the recovery of qualified medium can reduce the product medium and reduce the feeding amount of magnetic separator. Maximizing the intercepting medium can reduce the product medium and maximize the recovery medium to reduce the tailings loss of magnetic separator medium.
2021 S1 v.27 [Abstract][OnlineView][Download 117K]

Present situation and prospect of equipment intelligent operation and maintenance in Shendong Coal Preparation Center
YUN Yan;CHN Energy Shendong Coal Preparation Center;
Equipment management plays a very important role in the enterprise production process.Advanced equipment management and control means can not only play a positive role in the process of equipment operation and maintenance, hidden danger prevention and judgment, remote inspection and so on, but also play a key role in optimizing the enterprise production structure, improving the enterprise production efficiency and safety management and control.With the national promotion of the intelligent work of energy enterprises, Shangwan Coal Preparation Plant took the lead in the intelligent upgrading and transformation.Through the development and application of electromechanical management information system, equipment condition monitoring, remote inspection and other technologies, the equipment management and control ability had been greatly improved.Combined with the problems to be solved in the intelligent transformation of Shendong Coal Preparation Center at the present stage, the solutions was put forward.The future development direction of equipment operation and maintenance in intelligent coal preparation plant were prospected.
2021 S1 v.27 [Abstract][OnlineView][Download 233K]

Research and application of Shendong coal quality management model
QIAO Junqiang;ZHOU Ruitong;CHN Energy Shendong Coal Distribution Center;
Under the "double carbon" environment, in order to cope with the coal quality management dilemma of Shendong company′s thin coal level increasing year by year, the continuous decline of raw coal quality and the increasing difficulty of coal quality management, the coal distribution center has long explored and studied the current situation of Shendong coal quality management, gradually improved and formed a set of coal quality management mode with system matching, closed-loop operation and effective reward and punishment mechanism.Through the implementation of the closed coal quality management operation mechanism and the on-site management and assessment of the "unit chain" characterized by "pre control of pre production plan, implementation of control during production, improvement of post production processing and feedback of information in the whole process",the technical and management advantages of Shendong coal quality have been fully applied, which has effectively stimulated the enthusiasm of employees at all levels for coal quality management, and the waste discharge rate has increased year by year.Compared with the raw coal, the quality improvement of commercial coal is increasing, which effectively ensures the steady improvement of the economic benefits of the enterprise.
2021 S1 v.27 [Abstract][OnlineView][Download 104K]

Intelligent transformation of coal preparation plant
LI Qiang;CHN Energy Shengdong Coal Preparation Center;
In the report of the 19 th National Congress of the Communist Party of China, it is clearly proposed to accelerate the deep integration of information technology and the real economy, so as to promote the high-quality development of industrial economy.This is also one of the important reasons for the intelligent transformation of coal preparation plant in coal industry.To a large extent, the intelligent transformation of coal preparation plant is a strategic measure for the coal industry to enhance its core competitiveness, and it is of great significance to promote the upgrading and transformation of the coal industry and foster new economic growth points.This paper mainly analyzes and discusses the problems related to the intelligent transformation of coal preparation plant was discussed, and the framework and key technologies was stated.At last, the successful cases of the intelligent transformation of domestic coal preparation plant was explained.
2021 S1 v.27 [Abstract][OnlineView][Download 105K]

Cost engineering management of coal preparation plant
HE Jianbin;CHN Energy Shendong Coal Preparation Center;
Based on the cost engineering management model of coal preparation center of Shendong Coal Group, the present situation and existing problems of cost engineering management in coal preparation plant was analyzed, and the solution method was constructed, the application situation was discussed, and the preliminary situation of applying the method to practice was expounded, so as to provide reference for promoting and promoting the cost engineering management of coal preparation plant.
2021 S1 v.27 [Abstract][OnlineView][Download 108K]

Application of equipment operation and efficiency management system in intelligent coal preparation plant
ZHANG Xinyuan;LYU Hongguang;ZHOU Xianli;Shangwan Coal Preparation Plant,CHN Energy Shengdong Coal Preparation Center;China University of Mining & Technology-Beijing;CHN Energy Yulin Energy Washing Center;
A set of equipment operation and efficiency management system developed in the construction and exploration of Shangwan intelligent coal preparation plant was briefly introduced, with emphasis on the application of protection and statistics function in equipment operation of the plant.Through the introduction of system function and analysis, the changes of action times and influence time of coal stacking protection before and after application were compared.The results show that the system plays a significant role in the safety production of the coal preparation plant and is an outstanding achievement of the intelligent construction of the coal preparation plant.
2021 S1 v.27 [Abstract][OnlineView][Download 1369K]

Evaluation method and application of economic benefits of coal preparation plant based on unit calorific value system
ZHOU Ruitong;QIAO Junqiang;Shendong Coal Distribution Center;
In order to solve the problem that the economic benefit evaluation of coal preparation plant can not directly reflect the relationship between intermediate products and economic benefits and the calculation process is long, this paper started from the basic formula of the economic benefit calculation of coal selection plant, based on the unit calorific pricing system, and combines the production practice of coal selection plant.The formula for the relationship between the yield of gangue, the cost of transportation, and the increase in the moisture content of commercial coal was deduced and summarized.When the yield of gangue was higher than a certain value, multiple washing was economical.The process of economic evaluation of the production organization method was simplified to save a lot of manpower and material resources.According to the comparison of actual statistics and calculation data of Wulanmulun Coal Preparation Plant, The economic benefit evaluation method is effective and can guide the adjustment of production organization of coal preparation plant.
2021 S1 v.27 [Abstract][OnlineView][Download 110K]

Analysis on intelligent construction of safety management in coal preparation plant
MENG Jianwei;LI Hongming;CHN Energy Shendong Coal Preparation Center;
Combined with the current intelligent video monitoring technology, intelligent violation analysis technology, intelligent sensor online monitoring technology and AI training and learning technology, this paper conceived the integration of advanced technology with the safety management information system of Shendong Coal Group, and further used scientific and technological means to realize remote monitoring of operation site, real-time alarm of unsafe behavior automatic troubleshooting of potential safety hazards, approval of handheld terminals for special operations, intelligent monitoring of working environment, intelligent analysis of safety education and training, etc. "Human management" was changed to "science and technology management",and the problems of insufficient safety management personnel, considerate investigation and treatment of unsafe behaviors, cumbersome work permit management and low efficiency of safety education and training were solved, so as to be more fair and efficient means to realize the intellectualization of safety management in coal preparation plant.
2021 S1 v.27 [Abstract][OnlineView][Download 102K]

Research on the construction of intelligentand standardized coal quality management mode
JIANG Shuijun;CHN Energy Shendong Coal Group Co.,Ltd.;
In order to solve the problems existing in the current coal quality management, this paper analyzed the traditional coal quality management mode and studied the application of intelligent technology in coal quality management, and put forward the construction of intelligent and standardized management mode of coal quality management, so as to realize the real-time dynamic control of coal quality and the whole process coal quality control of 24-hour real-time monitoring in the whole process of coal operation.Combined with the responsibilities of the coal quality management department of Shendong Coal Distribution Center, this paper put forward the corresponding organization allocation method.The mode is deeply integrated into the coal mine intelligent system of intelligent perception, intelligent decision-making and automatic execution, so as to realize mechanized replacement and automatic personnel reduction, and promote the healthy development of the coal industry.
2021 S1 v.27 [Abstract][OnlineView][Download 312K]

Analysis of harmful gas management measures in Burtai Coal Preparation Plant
YUAN Chaohui;Buertai Coal Preparation Plant,Shendong Coal Preparation Center;
There are two main types of the harmful gas of coal preparation plant, the gas and carbon monoxide, the main source of the gas is produced in the process of the coal mine mining, the coal transportation and coal in the process of storage and carbon monoxide is mainly due to the high temperature combustion, the two kinds of gas in coal preparation plant personnel poses a serious threat to personal safety.Therefore, the two harmful gases should be prevent and controlled.The key point of prevention and control is to ensure that the harmful not exceed the standard.
2021 S1 v.27 [Abstract][OnlineView][Download 124K]

Measures to improve production efficiency in Yujialiang Coal Preparation Plant
JIA Jiajia;Yujialiang Coal Preparation Plant,CHN Energy Shendong Coal Preparation Center;
With the mining progress of Yujialiang Coal Mine, there are many factors that restrict the production efficiency of Yujialiang Coal Preparation Plant.Through analysis, the constraints and shortcomings were found in the process of improving production efficiency, and finally the methods and suggestions to further improve production efficiency was put forward, so as to achieve and implement the steady improvement of production efficiency.
2021 S1 v.27 [Abstract][OnlineView][Download 206K]

Noise control in coal preparation plant
DANG Tianxiong;CHN Energy Shengdong Coal Preparation Center;
According to the noise pollution status of coal preparation plant, the main noise source areas and noise source equipment was found out.Based on the spectrum characteristics of different noise sources and the requirements of surrounding sound environment, targeted control measures were taken.Through noise control, the single machine noise of the main noise source equipment reduces by more than 20 dB,and the noise of coal preparation plant meets the requirements of international standards.The noise control measures of the coal preparation plant create a safe and healthy working environment for employees.
2021 S1 v.27 [Abstract][OnlineView][Download 124K]

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