2016年06期目次

  • Development tendency of coal blending technologies in coal-fired power plants burning low calorific value coal

    KONG Huiru;ZHANG Yuanyuan;LI Yongmao;YANG Fengling;CHENG Fangqin;Institute of Resources and Environment Engineering,Shanxi University;School of Renewable Energy,North China Electric Power University;Shanxi Pingshuo Gangue Power Generation Co.,Ltd.;Coal Combustion Pollution Controlling and Utilization of Shanxi Province Key Laboratory;

    Single and non-ideal coal led to unstable operation and high cost of coal-fired power plants which burnt low calorific value coal.The main technologies,equipments and management situation of coal blending were discussed. The coal resources and properties of five Shanxi coal-fired power plants were investigated.Overall design principle and objective were proposed based on the on-line analyzed results.A closed coal storing and blending control system without coal silo was designed.The system could blend coal efficiently and automatically even there were large coal.The system could reduce the cost by 1%,the coal loss were decreased by 1% to 2%.Benefit from the system,there wasn't large SO_2,NOxemission in a short time.The system also improved coal blending efficiency and stabilized the fuel supplement.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 1539K]

  • Application of blending and molding method in eliminating viscisity of caking coal

    LIN Hong;ZHANG Xuhui;ZHANG Yunpeng;WU Peng;ZHANG Peilin;QU Wanling;NARI Group Corporation State Grid Electric Power Research Institute;Beijing Guodian Futong Science and Technology Development Co.,Ltd.;

    In order to eliminate the viscosity of caking coal during pyrolysis process,a coal blending molding mode was adopted.Under laboratory condition,one caking coal was taken as raw material,then proper proportion of non-caking coal and binder were added to the raw material.The application of blending and molding method in eliminating viscosity of caking coal was studied.The influence of particle size and ratio of two raw coals,amount of binder and water on the molding process were investigated.The results showed that,when the ratio of caking coal to the non-caking coal was 50 ∶ 50,meanwhile the diameter of the caking coal and non- caking coal should be ≤0. 5 mm and ≤1 mm respectively,the binder addition was 1. 0%,molding moisture was 15%,the cold compressive strength of dry briquette and formed cake could be up to 363 N and 597 N,and there was no bonding phenomenon in the low-temperature carbonization experiment,the product met the material property requirements of Guo Fu( GF) furnace.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 389K]

  • Separation performance prediction model of FGX dry separator

    XIA Yunkai;LIANG Dawei;Tangshan Shenzhou Machinery Co.,Ltd.;Hebei Coal Dry Processing Equipment Engineering Technology Research Center;

    To predict raw coal dry separation index effectively and realize quantitative simulation of influencing factors,the influence of upper size,lower size,whole size fraction separation density on δ and Epwere analyzed.A mathematical model was also built.To verify the accuracy of the model,some dry separation tests were conducted in Nanyao coal mine. The results showed that,with the decrease of average particle size,the actual separation density increased,the separation of fine coal became worse significantly.The coefficient of association R2 between δi-δ and Diwas 0. 91.The coefficient of association R2 between Diand the ratio of Epand δiwas 0. 78. The results obtained by the mathematical model were close to the actual separation results of pilot tests. When the separation density was above 1. 80 g / cm~3,the clean coal ash was more than 24%,the separation efficiency was stable.Meanwhile,the theoretical clean coal yield was close to the actual result.The separation efficiency became worse when the separation density was low.The mathematical model provided reference for separation efficiency prediction and dry separation plant flowsheet design.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 343K]

  • Determination of concomitant lithium element in coal and fly ash by inductively coupled plasma-optical emission spectrometry

    FENG Huijuan;LYU Xinlei;Geology Bureau of Coal Resources,Coal Industry Office of Shanxi Province;

    In order to determine concomitant Li content accurately in coal and fly ash,the coal and fly ash samples were ashed at high temperature first,then the products was dissolved by nitric acid-hydrofluoric acid-perchloric acid ternary system,at last,the inductively coupled plasma-optical emission spectrometry( ICP-OES) was adopted to determine the Li content. The results showed that,the Li content could be determined accurately without matrix matching by optimizing decomposition method,RF power,observation height,analytical line and spectral and observation mode.The detection limits of coal and fly ash were 0. 01,0. 03 μg / g,the recovery rate of three coal samples whose Li content had a large different ranged from 92. 8% to 96. 0%.The method was verified by soil national standard reference materials of GB W07405,GB W07406 which were similar to the ash.The results were in agreement with the certified value,and the relative standard deviation( n = 12) was 0. 99%,0. 73% respectively.The method had the advantages of rapidity,simplicity and accuracy.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 133K]

  • Study of slurryability of the semi coke sample

    ZHANG Yurong;YANG Hongying;WU Youbin;Shaanxi Research Design Institute of Petroleum and Chemical Industry;Shaanxi Industry Water Treatment Research Centre of Engineering Technology;Shaanxi Yanchang Petroleum Yulin Coal Chemical Co.,Ltd.;

    In order to utilize char efficiently and broaden the raw materials sources of coal gasification,the slurryability of Yushennenghua char samples were studied using cutting and milling methods.The influence of additives types and dosage,coal water slurry( CWS) concentration on viscosity and stability of CWS were investigated.The research was to find out whether the char and lignite were suitable for practical industrial production.The results showed that,when the dosage of additive MX was 0. 2% and the feed concentration was 69%,the viscosity of Yushen char CWS could range from 800 m Pa·s to 1 200 m Pa·s,the shearing resistance and stability were good which meant the CWS was suitable for boiler.When the mass ratio of Wenyu lignite and Yushennenghua char was 3 ∶ 7 or 2 ∶ 8,the dosage of additive FX or MX was 0.3%,the concentration of CWS was around 61%,the viscosity of CWS was( 1 000±200) m Pa·s,the precipitated water was less than 7% and there was no hard sediment after 72 hours standing. If proper additive was chosen,both Yushen char and blending coal of Yushen char and Wenyu lignite were suitable for gasifying CWS.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 215K]

  • Research on interactions and kinetic during co-pyrolysis of subbituminous coal and high sulfur coking coal

    WANG Peng;QI Hongtao;SHEN Yanfeng;WANG Meijun;CHANG Liping;Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province,Taiyuan University of Technology;Coking Plant of Shanxi Taigang Stainless Steel Co.,Ltd.;

    To investigate the interactions between sub-bituminous coal and high sulfur coking coal during co-pyrolysis process,a Shuiyu high sulfur coking coal( SC) with relatively resource-rich was selected as the main coking coal sample,and a Yining sub-bituminous coal( YC) was selected as the blended coal sample.Two raw coals and their mixtures with different ratios were pyrolyzed by the thermogravimetric technique to study the interactions of co-pyrolysis process,and the kinetic parameters were calculated to analyze the pyrolysis process.YC and SC had significantly different pyrolysis behaviors.The weight loss during co-pyrolysis of blended coal increased with the increasing ratio of YC coal,and the co-pyrolysis behavior of blended coals was not the simple sum of the individual pyrolysis behavior of SC and YC.The kinetic parameters of two coals and their mixtures in different pyrolysis stages were different,the values of activation energy and preexponential factor in different pyrolysis stages changed regularly with the increasing ratio of blended YC coal,while their values were not simple weighted average of those of the two single coal.The pyrolysis characteristics of the mixed coal were the results of a interplay of the two raw coals.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 1082K]

  • Research on flow field of gasifier with seven nozzles based on PIV technology

    FANG Xinhui;GONG Zhijian;FENG Ziyang;LIU Zhen;School of Chemical and Environmental Engineering,China University of Mining & Technology (Beijing);National Institute of Clean-and-Low-Carbon Energy;

    A cold model unit was built to study the flow field distribution of gasifier with seven nozzles.The experimental method of PIV was used to measure the flow fields of the upper,middle and lower parts of gasifier,the influence of particles flow rate and dispersed-gas flow rate on flow field were analyzed.The results showed that,when the particles flow rate ranged from 20 kg / h to 150 kg / h and the dispersedgas flow rate ranged from 740 m3/ h to 880 m3/ h,the upper flow filed of the gasifier had the characteristics of free jet significantly,the length of jet flow was 40 cm,the average efflux velocity was 25 m / s. Meanwhile,the middle and lower flow filed was mainly formed with mixing zone,and the velocity of the whole field was below 8 m / s.As particles flow rate increased,the maximum jet velocity decreased from40 m / s to 15 m / s,and the pattern of jet flow was tend to disperse.As the dispersed-gas flow rate increased,the maximum jet velocity decreased from 25 m / s to 35 m / s,while the length of jet flow had no significant change. The influence of the two factors on the flow field mainly reflected in the top of gasifier,and gradually weakened in the middle and lower flow fields.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 3035K]

  • Conversion of sulfur of direct Shenhua coal liquefaction process

    WU Qiong;GAO Yulong;LIU Kelan;China Shenhua Coal to Liquid and Chemical Co.,Ltd.;China Shenhua Coal to Liquid and Chemical Ordos Coal Liquefaction Company;Shenhua Ningxia Coal Industry Group Coal to Liquid Company;

    In order to reduce sulfur emission during coal utilization,the conversion of elementary forms and contents of sulfur in raw materials,catalysts promoters,intermediate product,product oil and wastes of direct Shenhua coal liquefaction process were discussed.The transform and removal mechanism effects of sulfur were analyzed during coal gasification,purification of shifted gas,coal liquefaction,hydrogenation stabilization,hydro fining and 3-level hydrogenation reaction processes.The full process sulfur balance was measured and analyzed by using DCS data collection and spot sampling methods.The results showed that the gasoline product after desulfurization process completely met the standard of national V,so the SO_2 emissions of automobile exhaust could be significantly reduced.The technology transferred injection sulfur and parts of coal sulfur to sulfur,38.43% sulfur was recycled.The sulfur which couldn't be reused was transfered into oil dregs and ashes in coal liquefaction.The process could protect environment effectively.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 225K]

  • Status and suggestion of thermal fragmentation of low rank coal

    CHANG Zhaogang;WANG Libin;PEI Xianfeng;ZHOU Qi;Research Institute of Coal Chemistry,China Coal Research Institute Co.,Ltd.;State Key Laboratory of Coal Mining and Clean Utilization;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;

    In order to cleanly use lignite in large-scale,the status of fragmentation during thermal conversion of coal at home and abroad was analyzed.The fragmentation mechanism,the effects of coal quality and transformation conditions on fragmentation of coal were investigated.Due to the issue such as high content of dust in tar during the utilization of low rank coal,some solutions for inhibit pathway of thermal fragmentation were proposed.The fragmentation mechanism could be revealed by analyzing and regulating the physical and chemical properties of low rank coal and the transformation conditions.Based on the thermal reaction products,the relationship between fragmentation and heating process was established. The amount of dust could be decreased through exploiting new reactor which minimized the motion of coal particles.A technology approach for clean and efficient utilization of low rank coal was built.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 438K]

  • Pyrolysis characteristics of Beilutian lignite of different particle sizes

    ZHAO Xiaonan;DING Li;GUO Qihai;DONG Bin;WU Daohong;Beijing Shenwu Environment & Energy Technology Co.,Ltd.;Pyrolysis and Quality Engineering Technology Research Center of Low Rank Coal and Organic Waste in Beijing;

    In order to study the optimal particle size for lignte pyrolysis in the fixed bed,taking Beilutian lignite as coal samples,the pyrolysis experiments of 0 to 50 mm particle size coal samples in a self-made 3 kg fixed bed pyrolysis device were conducted. The influence of lignite particle size on pyrolysis products,pyrolysis time and dust content in volatile matter were investigated.The results showed that,with the lignite particle size increasing from 0 ~ 10 mm to 40 ~ 50 mm,the pyrolysis time and dust content in tar and coke-oven gas decreased.The pyrolysis time reduced from 197 minutes to 164 minutes,the dust content in the raw gas per unit volume decreased from 0. 022 mg / L to 0. 011 3 mg / L,and the dust content in the tar was greater than that in the raw gas.The lignite of 20 ~ 30 mm particle size was suitable for pyrolysis,because the resistance of volatiles escape during pyrolysis was smaller and the secondary reaction and carbon deposition hardly occurred.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 543K]

  • Influence of ash in liquefaction residue on formed coke intensity and influence mechanism analysis

    YU Hualong;FAN Juan;ZHANG Ya;LIU Qiaoni;SHI Junwei;CAO Ming;Xi'an Research Institute of China Coal Technology & Engineering Group Corp;Xi'an Center of Geological Survey,China Geological Survey;Shaanxi Longmen Coal Chemical Co.,Ltd;China Coal Xi'an Design Engineering Co.,Ltd.;

    To investigate the effects of ash on the compressive strength of formed coke,the compressive strength and pyrolysis products yield of formed cokes which were prepared with low rank coal and liquefaction residue were analyzed.The pyrolysis products were characterized by FTIR and TGA.The results showed that the liquefaction residue enhanced the compressive strength,while the ash was hazard for formed coke.Experimental investigation showed that there were big differences in the compressive strength between coke preparation of SJC with DCLR before and after de-ashing,and the maximum difference was up to 200 N.Affected by the hydrogen-donor effect of DCLR,the yield of formed coke decreased,while the yields of gas and tar increased.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 647K]

  • Coking test of non-caking coal in a small coke oven

    ZHANG Wencheng;GAO Zhifang;ZHENG Mingdong;Department of Chemistry and Chemical Engineering,Anhui University of Technology;Shanghai Meishan Iron and Steel Corporation Technology Center;School of Metallurgy Engineering,Anhui University of Technology;

    In order to study the effect of pretreatment on non-caking coal blending and coking,a small coke oven was used in coal blending and coking test.The differences between non-caking coal and pretreatment non-caking coal were studied,which included metamorphic degree and bonding properties of blending coal,coke strength and coke optical tissue.The results indicated that the vitrinite maximum reflectance increased from 0. 46% to 1. 20% because of the decrease of oxygen-containing functional groups. The pretreatment didn't make the non-caking coal more sticky and the caking property of blending coal fell slightly. The small coke oven test showed that,the barrate strength of coke prepared from pretreatment non-caking coal increased by 0.5%,the post-reaction strength decreased by 1%. The barrate strength and post-reaction strength of coke prepared from non- caking coal decreased by 1% and 4% respectively. The pretreatment increased the medium grain mosaic structure and the anisotropic index increased by 7.7% to 15.8%.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 776K]

  • Influence of sodium occurrence mode and migration on fouling characteristic of coals

    SHI Huijuan;WANG Jinsheng;ZHANG Xiuchang;YUE Pengfei;RAN Shenming;ZHOU Qi;Clean Combustion and Flue Gas Purification Key Laboratory of Sichuan Province;Dongfang Electric Group Dongfang Boiler Co.,Ltd.;

    To study the fouling characteristic of high sodium coal when it was used in utility boilers,the total sodium content,occurrence mode and migration of several common steam coals in Xinjiang were studied by one-step-extraction and low-temperature ashing methods.Combining with the fouling results in the pilot plant,the relationships between the above factors and the fouling characteristic were obtained.The results showed that,the fouling characteristic had obvious relationship with active sodium content in coal.Furthermore,the active sodium content which caused the serious fouling was higher with the higher total sodium,water-solution sodium and sodium lost ratio with combustion and the lower ash.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 369K]

  • Optimization of steel ball grading and filling of ball mill

    HE Xiang;WEI Zengtao;ZHOU Wentai;MA Dafu;SHI Hongfei;CHEN Duanyu;Shanghai Power Equipment Research Institute;

    In order to lighten the wearing of steel balls and obtain a better way to fill steel balls,the experiments of coal fines sampling and screening,steel balls filling were conducted taking a 600 MW double- in- out ball mill as research object. The results showed that,the change of steel ball grading could be reflected by coal fineness and evenness index. When filling,the average diameter should be around the primary diameter.The best filling method was stabilizing the grading of the bigger balls,then increasing the grading of smaller balls.The proper grading could increase the evenness index to above 0.8,and decreased unit loss by 3 k Wh / t.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 848K]

  • Co-combustion tests under low load condition on supercritical circulating fluidized bed boiler

    ZHAO Yonghong;HAN Ping;Shenhua Group Co.,Ltd.;Shenhua Guoneng Energy Group Co.,Ltd.;

    In order to obtain the effects of variable fuel on the operating reliability and stability under low load of the first 600 MW supercritical CFB boiler in the world,the co-combustion experiments of different proportions of designed coal and Shenhua coal were carried out on the 600 MW supercritical CFB boiler under low load condition. The characteristics of the combustion system,steam- water system,flue gas-air system and pollutant emission were analyzed.The results showed that the operation of the supercritical CFB boiler maintained stable and the average thermal efficiency reached above 90% when the blending ratio of Shenhua coal was 50% under 60% rated load condition.The parameters of superheated steam and reheated steam could satisfy the design requirements. The emission of SO2 and NOx were controlled below 200 mg / m3,which met the environmental protection criteria of Sichuan Province.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 940K]

  • Experimental research on coal low-temperature oxidation kinetics under multiple influencing factors

    ZHOU Xihua;GUO Xiaoyang;SONG Dongping;BAI Gang;ZHANG Ju;WU Meng;School of Safety Science and Engineering,Liaoning Technical University;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education;Jilin Institute of Safety Science and Technology;

    In order to study the effects of oxygen concentration,particle size and volatile matter on low- temperature oxidation of coal in goaf,the experiment of coal low-temperature oxidation was designed by using oil bath temperature programmed experimental device. The oxygen consumption rate and heat release rate of coal under different influencing factors were tested,the effects of oxygen concentration,particle size and volatile matter on the oxidation characteristics of coal at low-temperature were verified through the processing and analysis of experimental data.At last,the change law of the characteristics of coal low-temperature oxidation which were influenced by various factors was obtained.Experimental results showed that,in a certain range,the increasing of oxygen concentration could speed up the oxygen consumption rate of coal,increase the heat release rate of the reaction and promote the oxidation of coal,while it didn't change the trend of the oxidation reaction.The increase of coal particle size led to the decrease of oxygen consumption rate,the reduction of the heat in reaction,the reduction of the oxidation process and the decrease of the strength.When the volatile matter of coal decreased,and the rate of oxygen consumption and the heat release rate of the reaction decreased,and the critical temperature of the coal spontaneous combustion was significantly increased.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 964K]

  • Technical route of air pollutants ultra low emission modification for 300 MW CFB boilers

    DUAN Shoubao;Shenhua Group CFB Technology R&D Center;

    In order to choose a scientific technology to realize air pollution ultra low emission during CFB power plant transformation,two300 MW CFB boilers were chosen as the research object.The influence of different desulfurization,denitration and dust removal processes on the project was compared according to the technical indicators,system investment,operation and maintenance,etc. The results showed that the optimal technical route was applying semi-dry flue gas desulfurization and SNCR technology,dismantling the bag area of the existing electric-bag filter,and increasing high efficiency bag filter after semi-dry flue gas desulfurization tower.Moreover,desulfurization efficiencies inside and outside the furnace were 70% and 96. 59% respectively.Concentration of nitrogen oxide at the entrance to SNCR device was designed as 200 mg / m3,while the denitration and dust collection efficiencies were over 75% and 99. 971% respectively.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 161K]

  • Research progress and suggestion of coal chemical salty waste water treatment technologies

    CUI Cancan;LIANG Rui;LUO Mu;LIU Zhixue;DING Shaofeng;FAN Zhaoshi;NARI Group Corporation State Grid Electric Power Research Institute;Beijing Guodian Futong Science and Technology Development Co.,Ltd.;Appraisal Center of Environment & Engineering,Ministry of Environmental Protection of the People's Republic of China;

    In order to treat coal chemical waste water efficiently,different waste water treatment technologies and evaporation crystallization technologies were introduced by analyzing the salt source and waste water quality. The salt resourcfulization from the coal chemical salty waste water was summarized.Some management suggestions were proposed from four aspects.Source control should be carried out to reduce pollution.It was necessary to improve the operating personnel management level and accelerated the research on high salinity waste water treatment technologies.It was urgent to improve the salty waste water standard system and accelerated the research about coal chemical crystalline salt product standard and relevant environment risk.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 161K]

  • Technology and economy analysis of 660 MW coal-fired power unit with 1 Mt/a CO2 capture system

    WANG Feng;ZHU Dahong;JU Fudong;SUN Yongbin;North China Power Engineering CO.,Ltd.,China Power Engineering Consulting Group Co.,Ltd.;

    In order to investigate technology and economy of carbon capture system of conventional coal-fired unit,based on the standard situation and the investment of one 105 tons of post-combustion CO_2 capture system in domestic,the investments of five kinds of decarburization situation were estimated by production capacity index method. On the premise of 8% internal rate of return,the electricity prices,CO_2 comprehensive cost and sensitivity of five kinds of decarburization situation were analyzed.The results showed that carbon capture cost in the plant was the largest part in the total CO_2 emission reduction cost.With the fuel prices rising,CO_2 emission reduction cost gradually increased.With CO_2 comprehensive income increasing,feed-in tariff gradually declined.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 495K]

  • Influence of stirring heat on benzoic acid calorific value test

    HU Biao;ZHANG Jingsheng;XIONG Zhiming;LUO Jianming;Hunan Institute of Metrology and Test;Changsha Kaiyuan Instruments Co.,Ltd;

    In order to study the influence of stirring heat on benzoic acid calorific value test,an approximative calculated formula of stirring heat influence value was obtained. The formula was also verified by examples. The results showed that the influence of the stirring heat on calorific value was related to the stirring heat,period of time and sample mass. When the calculation didn't contain the stirring heat,the calculated calorific value was inversely proportional to the sample mass.When the calculation contained the stirring heat,the calculated calorific value kept unchanged.Considering the stirring heat as added heat in calculation,it helped to improve the accuracy and precision of testing results of calorific value.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 137K]

  • Treatment of exhaust from industrial naphthalene to phthalic anhydride equipment

    XU Hang;MAO Xiangrong;ZHOU Yaming;Shanghai Jian'an Chemical Engineering Co.,Ltd.;

    In order to treat the exhaust from industrial naphthalene to phthalic anhydride efficiently and choose reasonable treatment schemes,three main exhaust treatment systems which were washing absorption,regenerative thermal oxidizer and catalytic incineration were introduced.Combining with the practical operation conditions of these systems in domestic,the characteristics and problems of the systems were analyzed.The results showed that,the by-products of washing absorption had high values and the system met the requirements for desulfuration,but for industrial naphthalene to phthalic anhydride device,the system was prone to clogging.Regenerative thermal oxidizer needed less land and it was easy to operate while its maintenance was higher.The catalytic incineration ran stably and the process optimization space was large,while there were no domestic actual cases.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 393K]

  • Development and application of efficient green lubricative and anti-rust additive

    HOU Jiantao;ZHAO Xinnan;CHANG Yunzhen;Mine Oil Products Branch,Coal Science and Technology Research Institute Co.,Ltd.;National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control;State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources;

    In order to produce an efficient and multifunctional basic promoter of support water based hydraulic fluid,a vegetable oil based inhibitor was chosen as raw material,some new functional groups with lubricity were introduced to the raw material through chemical reaction.The product had excellent lubricity and anti-rust property.On the basis of the product,hydraulic support concentrate HFAS10-1 was designed whose concentration was 1%.The indicator of HFAS10-1 reached the coal industry standard MT 76—2011.The research reduced emulsion concentration and coal mine environmental pollution caused by emulsion discharge,it was in line with the development trend of energy saving and emission reduction.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 130K]

  • Area match between shale gas reservoir regional distribution and anhydrous fracturing medium CO2 emission sources

    SHAO Mingpan;XU Wenqing;GUO Yangyang;ZHU Tingyu;National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences;

    China is the largest CO_2 emitter in current,a large number of CO_2 emissions causes tremendous environmental pressure.The use of CO_2 in shale gas exploitation could reduce CO_2 emission and improve its utilization rate.In order to obtain CO_2 emission sources and distribution and status of shale gas reservoir,the CO_2 emissions from coal-fired power plants,iron and steel industries and cement industries,its distribution in China were calculated.The shale gas reservoir regional distribution was also analyzed. The resulted showed that,around the shale gas reservoir,the CO_2 emissions from coal- fired power plants,steel works,cement plants accounted for 70%,75% and above65% of the national CO_2 emissions from the corresponding industries respectively. In shale gas reservoir regional distribution,there was large CO_2 resources which was a precondition for anhydrous fracturing technology. So it was feasible to exploit shale gas using anhydrous fracturing technology which adopted CO_2 as medium.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 605K]

  • Prevention technologies of H2S in heavy and steep coal seams in Wudong coal mine

    SUN Bingcheng;Shenhua Xinjiang Energy Co.,Ltd.;

    High H_2S emission concentration in heavy and steep coal seams in Wudong coal mine was a huge security hazard.To resolve the problem,the H_2S migration law,H_2S drainage radius and coal injection wetting radius were analyzed. A comprehensive prevention and treatment system was provided which included pumping,spraying,sprinkling,injecting and protecting technologies.The results showed that the H_2S emission concentration was decreased to below 6.6×10-6.The research provided technical support for safety production.

    2016 06 v.22;No.106 [Abstract][OnlineView][Download 1281K]



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