2016年03期目次

  • Preparation of carbon molecular sieves used for coalbed methane pressure swing adsorption

    ZHANG Jun;LIU Xiaojuan;SHI Haoliang;ZHANG Xianglan;YAN Zhenlei;CHEN Xiaohan;School of Environmental and Chemical Engineering,China University of Mining and Technology(Beijing);

    In order to remove N2 from coal seam gas drainage,coconut shell char coal was adopted as raw material,benzene as settling agent,some carbon molecular sieves with different properties were prepared through carbonization,activation and deposition process. The effects of kind of precursor,benzene flow rate on carbon molecular sieve performance were studied. The results showed that,the precursor of carbon molecular sieve which was prepared when the carbonization temperature was 450 ℃,charring time was 40 min,activation temperature was 850 ℃ and the activation time was 120 min,the precursor performed best and its down-stream product carbon molecular sieve also had better separation effects. The best separation condition was that,the temperature was 750 ℃,the deposition time was 30 min,the benzene current capacity was 0. 45 m L / min.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 948K]

  • Granular coal blending characteristics of industrial boiler

    ZHAO Fuquan;LI Zhe;ZHAO Hang;LI Yuejiang;College of Mines Engineering,Heilongjiang University of Science and Technology;Jixi Xinke Clean Coal Co.,Ltd.;

    In order to improve thermal efficiency of industrial boiler,the volatile,calorific value and ignition characteristics of single coal and granular coal blending of long-flame coal from Jixi and import coal from Russia were studied. The results showed that 13 of 18 kinds of coal blending schemes presented higher volatile than calculated value,accounting for 72. 2%. On the whole,the measured volatile was higher than the calculated value and they had a linear relationship,the linear correlation R was 0. 962 3. The measured calorific values of15 coal blending schemes were lower than the calculated values,accounting for 83. 33%. The measured calorific value was smaller than its calculated calorific value and they had a linear relationship. On the whole,the linear correlation R was 0. 966 1. Within the permitted error,volatile and calorific value of granular coal blending in industrial boiler could be predicted by the calculated value. Ignition temperature increased with the increase of fuel ratio and they had linear relationship,the linear correlation R was 0. 901 1. A higher fuel ratio was against ignition.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 280K]

  • Pilot-scale experiment study on sludge coal water slurry preparation by sludge modification

    WANG Guofang;Energy Conservation and Engineering Technology Research Institute,Coal Science and Technology Research Institute Co.,Ltd.;National Research Center of Coal Water Slurry Engineering and Technology;State Key Laboratory of Coal Mining and Clean Utilization;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;

    In order to improve the addition of sludge and sludge coal water slurry concentration,reduce additive and production cost,a process of preparing high concentration sludge coal water slurry was developed in the laboratory by compounding modifying agent and high efficiency modification machine. Pilot-scale experiments were carried out to verify the results. The results showed that by using the compound modifying agent and high efficiency modification machine,the modified sludge viscosity was reduced by 30%,and the modified method could completely replace the fluid shock process. When the sludge content was 15%,the concentration of coal water slurry prepared by the modified sludge was 3% lower than that of ordinary coal slurry. The concentration of sludge water coal slurry prepared by the same sludge modification process and the optimized particle size distribution was quite similar to that of ordinary coal slurry. The pilot-scale results verified the laboratory-scale results and the reliability of the pilot-scale device.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 233K]

  • Effects of pretreatment on lignite restrained thermal cracking

    XU Chunxia;Research Institute of Coal Chemistry,Coal Science and Technology Research Institute Co.,Ltd.;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;State Key Laboratory of Coal Mining and Clean Utilization;

    In order to inhibit the thermal cracking of lignite,taking thermal stability as research object,the restrained thermal cracking effects of pretreatment temperature and time on Baoqing and Wulanchabu lignite were systematically studied using air dry oven and muffle furnace. The optimum pretreatment conditions for inhibiting thermal cracking of two kinds of lignite were discussed,and the products properties under the optimum pretreatment conditions were analyzed. The results showed that,with the increase of pretreatment temperature,thermal cracking of Baoqing lignite was enhanced,Wulanchabu lignite first decreased,then increased. The thermal stability of two kinds of lignite increased significantly after different pretreatment time. The optimum pretreatment conditions for inhibiting thermal cracking of two kinds of lignite were Baoqing lignite 110 ℃ and 4 h,Wulanchabu lignite 150 ℃ and 6 h. The main educts of two kinds of lignite during pretreatment were water,which accounted for more than 97% of the total weight loss,the rest was a little gas products,and there were no tar.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 235K]

  • Near infrared test method of total moisture and ash in coal

    YUAN Wene;Tunlan Coal Preparation Plant,Xishan Coal Electricity Group Co.,Ltd.;

    In order to detect total moisture and ash of coal quickly and with lossless,120 near-infrared diffuse diffuse reflection spectrums were collected from 120 clean coal samples. Differential spectra were analyzed. Based on markov distance to eliminate abnormal samples,a mathematical model of quantitative was estabilished combining partial least squares regression(PLSR) and different spectral preprocessing methods. The correlation between predicted values and actual values was analyzed. The residual error under the best pretreatment model was analyzed. The results indicated that modeling of moisture through multiple scattering correction(MSC) had better effects,the correlation coefficient was 0. 982 12,the root mean square error of calibration(RMSEC) and root mean square error of prediction(RMSEP)were 0. 013 and 0. 017. The modeling of ash through 5 points smooth had a better result,the correlation coefficient was 0. 947 47,the root mean square error of calibration(RMSEC) and root mean square error of prediction(RMSEP) were 0. 058 and 0. 052,the residual error of two indicators waved in uniform,and the model had better stability and predictive ability.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 753K]

  • Determination of sulfur in fly ash and bottom ash and its influencing factors

    CHEN Fanmin;WANG Jiarui;ZHAO Bing;LI Xiaojiang;Coal Testing Centre,Huadian Electric Power Research Institute;

    In order to improve the detection accuracy of sulfur in fly ash and bottom ash,coulometric titration and infrared absorption thermal conductivity method were investigated. The results showed that the ash particle size influenced the test results obviously. When the size was less than 0. 04 mm,the effect of particle size on high-sulfur fly ash detection could be eliminated. The time of high-sulfur fly ash detection was 200 s longer than that of total-sulfur ash and low-sulfur ash. The decomposition of calcium sulfate in fly ash was promoted by tungsten trioxide. For high-sulfur ash whose ash content was higher than current ash reference material,one test method was that the Kulun sulfur detector was demarcated by increasing the usage of ash reference material first,then the sample was tested by the demarcated equipment. Another method was that,the Kulun sulfur detector was demarcated by coal reference material first,then 0. 1 g activated carbon was added at the bottom of crucible which could shorten the test time obviously.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 474K]

  • Influence of steam on gasification characteristics of typical high ash fusion coal char

    WANG Peng;XU Chunxia;Research Institute of Coal Chemistry,Coal Science and Technology Research Institute Co.,Ltd.;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;Beijing Key Laboratory of Coal Based Carbon Materials;

    In order to take full advantage of high ash fusion coal,the gasification characteristics of typical Guizhou high ash fusion coal char under different gasification temperature and steam concentration were studied by isothermal thermogravimetry. The mixed reaction model was used to process the test data and the kinetic parameters were obtained. The results showed that,with the increase of gasification reaction temperature,the reactivity was improved,the peak value of gasification reaction rate increased,the gasification reaction time was shortened under different steam concentration. The more steam in gasification agent,the better the reactivity of coal char,the larger the peak value of gasification reaction rate. When the steam concentration was more than 30%,the difference was not obvious. The reaction index of typical Guizhou char gasification with steam was between 0. 912 9 and 1. 620 9,the activation energy was between 149. 34 k J / mol and165. 12 k J / mol.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 763K]

  • Research progress of low rank coal pyrolysis technology at medium-and-low temperature

    PEI Xianfeng;Research Institute of Coal Chemistry,Coal Science and Technology Research Institute Co.,Ltd.;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources;

    The research status of low rank coal pyrolysis mechanism,pyrolysis technologies and their advantages and disadvantages were introduced. The co-pyrolysis technology with other substances was the emphasis of the paper. A new small particle low rank coal pyrolysis process was introduced. Hydrogen pyrolysis could improve the yields of gas and lighter components of tar,it was used for pyrolysis mechanism now. Catalysts could be divided into cracking catalyst and hydrogenation catalyst,alkali metal,alkaline earth metal were typical cracking catalysts,transition metals and transition metal compounds were typical hydrogenation catalysts. How to improve the efficiency and life of catalyst was the research point. In order to speed up the industrialization of low rank coal pyrolysis,a coupling mechanism between each pyrolysis technologies was urgently needed.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 237K]

  • Flash pyrolysis of Indonesian lignite

    GENG Cengceng;CHEN Shuimiao;ZHANG Hongwei;MEI Lei;JIANG Chaoxing;REN Shouqiang;XIAO Lei;WU Daohong;Beijing Shenwu Environment and Energy Technology Co.,Ltd.;Beijing Low-rank Coal and Organic Waste Pyrolysis Technology Engineering Research Center;

    In order to investigate the product yield and characteristics of Shenwu flash pyrolysis furnace,a new flash pyrolysis equipment was built in laboratory by reducing the regenerative Shenwu flash pyrolysis furnace in accordance with certain proportion. Then the influence of pryolysis temperature on product yield and characteristics was analyzed. The results showed that the best operating temperature was590 ℃,with the oil yield of 9. 91%. The properties of coal tar from flash pyrolysis experimental installation,such as density,viscosity,freezing point and carbon residue,were lower than those of coal tar obtained from fixed bed. The results of simulation distillation showed that the gasoline fraction was 2%,the diesel fraction was 44%,while the heavy oil fraction was 54%. The flash pyrolysis gas of Indonesian lignite was mainly consist of CH4 and H2.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 190K]

  • Effects of aromatic solvents on mild hydro-upgrading reaction of low rank coal

    HUANG Peng;Coal Chemistry Research Institute,Coal Science and Technology Research Institute Co.,Ltd.;State Key Laboratory of Coal Mining and Chean Utilization;Key laboratory of National Energy Coal Utilization and Energy Conservation and Emissions Reduction Technology;

    In order to test the impact of solvent on hydrogenation modified process,a mild hydrogenation experiment with low rank coal was performed using batch autoclave,the solvent were tetralia and methylnaphthalene. The effects of different reaction conditions on conversion,gas yield,hydrogen consumption and distribution of products were investigated. The results showed that temperature had a remarkable effect on the conversion and gas yield,and the conversion rate and gas yield increased with the increase of temperature from 360 ℃ to 430 ℃.When the hydrogen pressure was less than 4 MPa,the dehydrogenation reaction became more significant,there were a large number generation of naphthalene in reaction system,the hydrogen pressure effect on conversion and gas yield was not obvious. Under low pressure,tetralia was the main hydrogen donor. The hydrogen was not reacted with coal directly,but with the solvent,so the hydrogen was supplied to the coal by solvent. The mild hydrogenation of low rank coal was a quick reaction,and the reaction time should not too long,a time period of 30 min to 60 min was appropriate. The properties of the modified product were analyzed,the bond index G was more than 75,ash was less than0. 3%,sulfur content was less than 0. 3%.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 1900K]

  • Influence of water-soluble sodium on high sodium coal pyrolysis

    ZHAO Bing;WANG Jiarui;CHEN Fanmin;LI Xiaojiang;Huadian Electric Power Research Institute;

    To remove sodium in Xinjiang Zhundong high-sodium coal and study the effects of water-soluble sodium on pyrolysis,series of pyrolysis experiments were carried out in thermogravimetric analyzer and drop tube furnace after washing treatment which could remove about 40% sodium. The distribution and characteristics of char,gas,and tar were inspected through thermogravimetric analyzer,inductively coupled plasma emission spectrometer,gas chromatography,etc. The results showed that washing process had little impact on pyrolysis process under the condition of slow and fast heat rate pyrolysis. The coupling of washing and low-temperature pyrolysis could remove sodium effectively. Compared with the raw coal tar,the combustion performance index of char was increased by 30%.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 753K]

  • Dewatering and desalination process optimization technology of high temperature coal tar

    ZHU Xiaoman;ZHANG Xiaojing;MA Bowen;Research Institute of Coal Chemistry,Coal Science and Technology Research Institute Co.,Ltd.;Beijing Research Institute of Coal Chemistry,State Key Laboratory of Coal Mining and Clean Utilization;Equipment Laboratory of Coal Utilization and Emission Control;

    In order to resolve problems of machine abrasion and distillation tower corrosion caused by high salt content during coal tar utilization,experiments for dewatering and desalination of high temperature coal tar were conducted by employing the following influencing factors,which were the types of chemical demulsifiers,the addition of chemical demulsifiers and purified water,temperature and standing time. The dewatering and desalting efficiency of each influencing factor was optimized and analyzed. The results indicated that the type of chemical demulsifiers and temperature were the most critical influencing factors. Meanwhile,polyether demulsifier was the best choice.When the dosage of demulsifier was 100 mg / kg,the water mass fraction was 20%,the salt of coal tar could be controlled under 5 mg / kg and the water was less than 1. 50% by keeping the raw coal tar at 130 ℃ for 4 h.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 915K]

  • Prospect analysis of synthetic natural gas based import coal in coastal area of China

    GAO Zhen;HOU Jianguo;WANG Xiulin;SONG Pengfei;ZHANG Yu;Research & Development Center of China National Offshore Oil Corporation Gas and Power Group;

    To make clear of development advantage and necessity of synthetic natural gas based import coal in coastal areas,the present situation of synthetic natural gas based inland coal in China was expounded,the competitiveness of synthetic natural gas preparation based import coal in the coastal regions was analyzed,and the development prospect was put forward. The investment of synthetic natural gas was huge,it also had many problems such as technical risk,pipelining,market risk and environmental pollution problems. Abundant water resorous,conventient raw material importing channels and products sale channeals decided that,developing synthetic natural gas was feasibility in coastal areas. Between 2013 and 2014,the prices of import coal were less than RMB 463 and 499 per ton respectively,it could ensure return on investment of 11%,significantly higher than import coal price from RMB 372 to 434 per year,so the project of synthetic natural gas based import coal in coastal areas had better investment income. In the future,in coastal areas,it should strengthen the construction of coal-based SNG / LNG plant,establish the integrated gasification combined cycle power generation systems,develop distributed energy relying on synthetic natural gas project and so on.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 91K]

  • Influence of temperature and atmosphere on transformation of Ge during lignite thermal transition

    ZHANG Zhihao;XU Dong;LIU Hanqiang;GUO Hua;Beijing Key Laboratory of Power Generation System Functional Material,Guodian New Energy Technology Research Institute;

    To investigate the transformation mechanism of Ge,a fixed bed reactor was used to measure the volatilization of Ge during lignite thermal transition at the heating temperature of 1 173 K,1 273 K and 1 373 K respectively. Two types of atmospheres were considered:100% N2 to simulate pyrolysis and 3% O2 in N2balance to simulate combustion. The results showed that the volatilization of Ge increased with the increase of temperature in both oxidizing and inert atmospheres,and it reached 91. 0% and 95. 6% at 1 373 K respectively. However,the oxidizing atmosphere suppressed the volatilization of Ge at 1 173,1 273,and 1 373 K,which was mainly caused by the oxidation of organic compounds of germanium in lignite,and followed by formation of germanium dioxide. Based on the experimental results,the enrichment mechanism of Ge in fly ash during lignite combustion was proposed for the first time. Ge mainly existed in organic form in lignite.During combustion process,it first decomposed into Ge-bearing small gaseous molecules(X-Ge). Then these gaseous molecules condensed on the surface of fly ash particles,and they were oxidized into germanium dioxide in the final stage.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 796K]

  • Abrasion characteristics and anti-abrasion measures of semi-coke used for power station boiler

    YANG Zhongcan;LIU Jiali;WANG Zhichao;YAO Wei;Xi'an Thermal Power Research Institute Co.,Ltd.;

    To reduce the abrasion of semi-coke for boilers,and promote its popularization and application in power station boilers,the coal characteristics,grinding and abrasion characteristics of semi-coke were introduced first,then the anti-abrasion measures for domestic pulverized coal boilers were summarized. In view of serious abrasion characteristics of semi-coke,double in and double out steel ball mill was prior recommended. According to abrasion characteristics at different parts,anti-abrasion measures should be strengthened on all of the parts used for coal powder preparation,conveying and burning process. These parts mainly included the mill grinding partner,coal powder pipeline,burning device and subsidiary parts. Moreover,the primary anti-abrasion measures included improving materials wear-resistant grade,surface wear-resistant heap welding,and posting or bolting the ceramic tablets. As for anti-abrasion on primary air piping,the measures included reducing wind speed,slowing elbow angles,reducing fineness of pulverized coal,extending length of wear-resisting parts and increasing thickness of wear-resisting parts. The results showed that semi-coke as a byproduct of coal chemical industrial chain of circular economy could be safely burned in power station boilers by improving its wear resistance.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 475K]

  • Influence of CaCO3 on explosion characteristics of coal consumed by industrial pulverized coal boiler

    XIAO Cuiwei;Energy Conservation and Engineering Technology Research Institute,Coal Science and Technology Research Institute Co.,Ltd.;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources;

    In order to avoid explosion of pulverized coal in industrial boiler,the explosion properties of coal dust-CaCO_3 mixtures were analyzed based on the experimental data of dust explosion obtained from a 20 L sphere explosion test apparatus. The results showed that the volatile content of coal had a greater impact on the maximum explosion pressure and maximum explosion index. The coal with higher volatile content also had larger Pmaxand Kmaxvalues. The Pmaxand Kmaxvalues of coal dust-CaCO_3 mixtures decreased with the increase of CaCO3 content. The higher the CaCO_3 content was,the more the Pmaxand Kmaxvalues decreased. The reduction of Kmaxvalues was proportional to the mixing proportion of CaCO_3,and the proportion coefficient was 1. 23. The mixture of pulverized coal with CaCO_3 could reduce the risk of dust explosion,and the inhibition effectiveness of CaCO_3 on dust explosions were related to the volatile and combustible basis. The inerting effect of coal with high volatile and low combustible basis was obvious.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 928K]

  • Double fluidized bed boiler and double fluidization efficient clean combustion technology

    LIU Xuebing;Shandong Huaju Energy Co.,Ltd.;

    In order to reduce pollutant emission of flue gas from coal-fired power plant,a double fluidized bed boiler was developed and the revelent efficient clean combustion technology was introduced on the basis of SO2 and NOxformation mechanism as well as their emission reduction methods. The operation could be optimized by index decouping technology. The formation and remove of SO2 and NOxalso could be controlled. Due to the new equipment and technology,the coal could burn efficiently and the flue gas could be reduced through theoretical analysis and actual production.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 247K]

  • Transformation of deoxidation system of industrial pulverized coal boiler based on programmable logic controller

    CHEN Zhe;CUI Yuhong;Energy Saving Engineering Technology Branch,Coal Science and Technology Research Institute Co.,Ltd.;State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;

    In order to improve the stability of deoxidation system of industrial pulverized coal boilers of Shendong Halagou coal mine,Cner coal mine,Bulianta coal mine,a PLC(programmable logic controller) was adopted to automaticly controlled deoxidation system. After transformation,the water temperature of deoxidation tank always maintained at 102 ℃,the level always accounted for 80% of total water tank liquid level,which provided stable and eligible water. The installation of PLC reduced the wear of boiler,improved the economic benefits and thermal efficiency.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 75K]

  • Experiment study of double-cone pulverized coal combustion chamber burning char

    WANG Yongying;YANG Shi;LIANG Xing;Energy Conservation and Engineering Technology Research Institute,Coal Science and Technology Research Institute;State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;

    In order to improve char combustion efficiently in industrial pulverized coal fired boiler,technology improvements of double-cone chamber,which was widely used in pulverized coal fired industrial boilers,were conducted according to the results of combustion characteristics and numerical simulation. Char combustion experiments in both kinds of chambers were conducted. The results showed that,compared with common chamber,the char burned more rapidly in chamber designed for char. The firing position moved forward,the temperature axial distribution through the furnace was more uniform. The range of excess air coefficient was extended. After transformation,the burn-out rate of char is significantly increased from 57. 54% to 6. 89%. The stability and efficiency of char combustion was obviously improved.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 792K]

  • Content and feature analysis of mercury in import Korea anthracite

    YANG Changqing;ZHANG Shuangshuang;HOU Yanna;LI Fang;ZHEN Jianhui;XU Zhibin;Tangshangang Office of Hebei Entry-Exit Inspection and Quarantine Bureau;Caofeidian Office of Hebei Entry-Exit Inspection and Quarantine Bureau;

    In order to establish detection method of Hg content in Korea anthracite and evaluate the distribution characteristics and environmental immigration risk,the microwave digestion-atomic fluorescence spectrometry(MD-AFS) method was used to determine mercury,the robust statistics technique was used to describe the feature of overall content of mercury,the quality was evaluated based on China grading standard. The results showed that,the anthracite samples could be completely digested when the digestion system was nitric acid-sulfuric acid-hydrofluoric acid(6∶ 4∶ 0. 5) and the digestion temperature was 205 ℃. The recovery rate of the methods could reach above98%. Calibration curve had good linear relationship in the range of 0 ~ 0. 8 ng / m L,the correlation coefficient was bigger than 0. 999 5 and the method detection limit was 0. 023μg / g. There was no statistically significant difference between MD-AFS and the direct mercury analyzer method. The anthracite coal samples with high organic matter content could be thoroughly digested by this method. According to the robust statistics of testing data,average content of imported Korea anthracite of mercuryin Tangshan port was 0. 611 μg / g. Eighty-seven percent was middle-high mercury coal. Widespread use of import Korea anthracite would easily cause serious mercury pollution to environment,so the supervision and control of imported Korea anthracite should be strengthened.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 346K]

  • Research on sweet spots of coalbed methane in Southern Shizhuang block of Qinshui Basin

    WANG Cunwu;LIU Yinghong;GUO Guangshan;LYU Yumin;YU Ziliang;New Energy Research Center,CNOOC Institute Research;

    To explore the prediction technique of CBM geological sweat spots,the Southern Shizhuang block of Qinshui Basin was taken as the study area,and frequency-divided inversion and spectrum imaging techniques were applied to predict coal seam thickness and gas content. Combined with the other parameters of coal reservoirs from exploratory wells,multi-layer evaluation method was applied to determine the CBM sweet spot of No. 3 coal seam in Southern Shizhuang block. The results showed that three sweet spots in the No. 3 coal seam existed in the study area,namely central,northwest and west sweet spots. Compared with the distribution of gas production performance,high production performance was located in the central sweet spot,and low production performance located in no-sweet spot,which meant that the prediction of sweet spots was fairly reliable.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 873K]

  • Comparison of single waste heat boiler process with double waste heat boiler process for wet entrained flow gasification technology

    ZHENG Yalan;LIN Yian;LI Chunhong;WEI Sunchang;HE Genliang;Xi'an Origin Chemical Technologies Co.,Ltd.;Northwest Research Institute of Chemical Industry;

    In order to recycle abundant sensible heat of high temperature raw gas from outlet of reaction chamber for wet entrained flow coal gasification efficiently,and improve energy utilization efficiency of system,a waste heat boiler was adopted for indirect heat exchange to recycle the sensible heat. Two types of wet entrained flow gasification technologies including single waste heat boiler process and double waste heat boiler process were described. The two technologies were compared from the aspects of technological process,technical index,heat recovery efficiency,comprehensive energy consumption,investment and operating cost,operating condition and others. The results showed that,when used alone for IGCC power generation,the double waste heat boiler process was preferred to maximize the efficiency of the energy use,when used in chemical synthesis combined with IGCC power generation,the single waste heat boiler process was a better choice.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 357K]

  • Damage diagnosis of reverse osmosis membrane

    ZHANG Dong;ZHAO Fengxia;FAN Zhaoshi;Beijing Guodian Futong Science and Technology Development Co.,Ltd.;

    In order to improve the stability of water supply system of boiler in power plant,it was necessary to take full-scale and accurately detection for the abnormal situation during the operation. The abnormal operation situation of No. 4 thermal power plant in Mongolia was taken as an example,one of RO membranes were detected by a series of methods,including outside view detection,ion rejection detection,probe detection,coloration test and electron spectroscopy for chemical analysis. The detection results indicated that,there was a physical broken at 300 mm area near the inlet port,and the membrane were contaminated by oxychloride,the amount of chlorine reached 1.01%. The research and development of new antioxidant membrane material which could replace polyamide and the modification of polyamide improved the stability of water supply system.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 100K]

  • Development of industrial pulverized coal boiler

    LI Hongwu;Shuohuang Railway Development Co.,Ltd.;

    In order to gain an insight into technical idea,technological orientation,supporting policies and business model of industrial pulverized coal boiler,its development process was introduced. The key technologies should focus on safe and steady storage of pulverized coal,dense phase supplement,dense phase combustion,and pollutant alien control technology. Fuels should be allocated in a unify way. A supporting financial and tax policies should be made to promote the extension. The advanced EMC mode should be utilized to solve the finance problem of the project.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 90K]

  • Process optimization for synthesis gas washing system of GSP gasification plant

    SU Yuan;YUAN Jiansen;ZHAO Zhenxin;CHEN Jie;Olefin company,Shenghua Ningxia Coal Industry Group;College of Chemical and Materials Engineering,Henan University of Urban Construction;

    To ensure the safe and stable operation of GSP pulverized coal gasification under pressure device,resolve the problems caused by partial condenser of process flow of synthetic gas washing system in GSP pulverized coal gasification quenching process,a technical transformation to the partial condenser of washing system was conducted by cutting it out. Some condenser was taken as a channel of syngas by isolating from system. The dust content of synthetic gas was not affected by the transformation. Increasing the temperature of syngas by 3 ~5℃ before piping it into transformation system,moving up gas piping time by 10 min,the system could save syngas 3. 33 × 104m3/ h,methanol 686 t. The medium pressure boiler water and secondary high pressure steam consumption were reduced. The condensate in steam unit was also reduced.

    2016 03 v.22;No.103 [Abstract][OnlineView][Download 639K]



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