2016年02期目次

  • Preparation and separation performances of carbon molecular sieve for coal-bed methane purification

    LI Lanting;Beijing Research Institute of Coal Chemistry,Coal Science and Technology Research Institute Co.,Ltd.;Beijing Key Laboratory of Coal Based Energy Conservation and Environment Protective Carbon Material;National Key Laboratory of Coal Mining and Clean Utilization;

    In order to analyze properties of carbon molecular sieves( CMS),BM carbon molecular sieve( BMCMS) was prepared from phenol-formaldehyde waste with additives by one-step carbonization-chemical vapour deposition( CVD) technique on industrialized scale.The microstructure and properties of BMCMS,such as pore volume,pore size distribution,adsorption value and rate of N_2 or CH_4,and separation performance to coal-bed methane,were determined by CO_2 adsorption,electronic balance and PSA,respectively. The results showed that BMCMS had more micro-pores below 0. 85 nm,especially in the range of 0. 4 nm to 0. 65 nm,the rate was over 66%,while the rate of JCCMS was 65%. The pore could hold back CH_4 and adsorb N_2 easily,while the diameter of the pore reached to the scale of 1. 1 to 1. 8times of that of N_2 molecular. Moreover,the concentration of methane increased by 25. 6% with PSA compared to that without PSA. The results indicated that the separation performance of BMCMS for coal-bed methane purification was better than that of JCCMS.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 643K]

  • Drying characteristics of Fugu semi-coke

    GUO Qihai;ZHANG Shunli;ZHANG Jiaoyang;DING Li;XUE Xun;WU Daohong;Beijing Low-rank Coal and Organic Waste Pyrolysis Technology Engineering Research Center;Beijing Shenwu Environment and Energy Technology Co.,Ltd.;

    Different coking process and coke quenching process led to large fluctuation of coke moisture. In order to resolve the problem,drying experiments were carried out using the Fugu semi- coke as raw materials. The effects of particle size,drying temperature,with or without air blast and accumulative thickness on drying rate were determined. The results showed that the drying rate increased with the decrease of particle size at a fixed drying condition. When the particle size decreased from 50 mm to 10 mm,the time needed for achieving the same water contents( 1%) distinctly shortened from 57 min to 31 min. With the temperature decrease,the adjustment period of initial drying stage was prolonged,the drying rate declined and the removal quantity of water decreased. To ensure a faster drying rate,the appropriate temperature should be controlled above 200 ℃. Adding air blast and reducing accumulative thickness of semi-coke helped to promote the drying rate. The use of forced air drying method could increase the dehydration rate by 23%.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 452K]

  • Optimal selection of magnetic seeds flocculation treatment of slime water

    LYU Yuting;ZHAO Liying;YANG Qiang;LIU Huiying;College of Mineral Engineering,Heilongjiang University of Science and Technology;Jilin Province Administration of Gold;Hegang Branch of Dragon Mining Group Co.,Ltd.;

    To study the magnetic flocculation effects of slime water deposition,using self-made flocculation sedimentation pipe,in magnetic flocculation setting velocity( v) and supernatant turbidity( TU) as evaluation index,the orthogonal test of three factors magnetic field intensity,the dosage of magnetic flocculating seeds,the dosage of PAM and three levels for optimization selection was carried out. The results showed that,the influencing factors from the biggest to the smallest were the dosage of PAM,the dosage of magnetic flocculating seeds,magnetic field intensity. The setting velocity and turbidity supernatant fluidregression equations were established by regressing data of experiment. The experimental results were predicted by two regression equations. The optimal results showed that the magnetic field intensity was 0. 25 T,the dosage of magnetic flocculating seeds was 0. 36 g / L,the dosage of PAM was 29 g / t,and the setting velocity and turbidity supernatant fluid were 10. 44 mm / s and 33. 71 NTU,respectively. The correlation coefficients( R2) and significance levels( P) of the two regression equations respectively were 0. 938,0. 011 and 0. 933,0. 013,and the significance test had reached significant level( P<0. 05).The predictions by the regression equations were close to the measuring results.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 298K]

  • Key parameters of briquetting equipment for civil sludge mixed with semi-coke powder

    LIN Hong;ZHANG Xuhui;TENG Jilin;QU Wanling;WU Peng;ZHANG Yunpeng;Beijing Guodian Futong Science and Technology Development Co.,Ltd.;

    In order to design a suitable industrial equipment which could realize large-scale production of civil sludge mixed with semicoke powder,the briquetting test was conducted using a pressure testing machine and a roll-type forming machine under laboratory conditions. The influence of compression characteristics of material and roller speed on the strength of briquette was investigated. The results showed that when the briquetting pressure was 17. 5 MPa,the compression ratio of civil sludge mixed with semi- coal powder molding reached the maximum of 0. 487 8. When the roller wheel speed of briquetting machine was 8 r / min,and the rolling time was 0. 41 s,the shaping effect was the best. The friction angle between the materialand the roller was 15. 86°,frictional factor was 0. 28.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 432K]

  • Research progress and prospect of coal microbial flocculant

    FAN Xiaolu;ZHANG Dongchen;YAN Jia;School of Material Science and Engineering,Anhui University of Science and Technology;Key Laboratory of Modern Mining Engineering of Anhui Province;

    In order to prepare kinds of coal microbial flocculants with good performance,the component and flocculation effects of coal microbial flocculant were introduced. The research progress of flocculant kinetics improvement by adopting fractal theory was investigated. The effects of dosing methods and microbe on flocculation were analyzed. The structure of active substances of coal microbial flocculant on a molecular level was the emphasis of research. More biological engineering methods should be introduced to raise microbe. The raising of coal microbial flocculant should consider gene regulation and DNA mutagenesis. The raising of compound microbe and the synergistic effect of microbial flocculant and traditional flocculant were the emphasis of research.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 132K]

  • Status and improvement approach of low rank coal upgrading technologies

    ZHOU Qi;Beijing Research Institute of Coal Chemistry,Coal Science and Technology 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 use low rank coal cleanly,the status of low rank coal upgrading technologies at home and abroad was compared. The typical technologies with moving bed,rotary furnace,fluidized bed,and entrained bed as pyrolysis reactor were investigated. The results showed that the selection of pyrolysis technology should be based on the coal particle size. The solid heat carrier process was right for pulverized coal utilization. The prolonging of residence time of coal in lower temperature zone could decrease secondary interaction of tar and increase tar yield. Indirect heating mode easily led to high dust in oil. Due to the issues,such as low tar yield,high content of heavy species and dust in tar,spme solution for upgrading low rank coal in stages were proposed based on the coal quality and composition. The content of heavy species in tar could be suppressed by controlling pyrolysis reaction,and the amount of dust could decrease through exploitnew reactor. A technology approach for clean and efficient utilization of low rank coal was built.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 1237K]

  • Moisture and volatile releasing characteristics of lignite

    XU Tong;China Coal Technology and Engineering Group Clean Energy Co.,Ltd.;

    In order to study the moisture and volatile releasing properties of Chinese typical lignite,a Mengdong lignite was adopted as research object at different temperature and particle size using isothermal oven and thermo-gravimetric to study its moisture releasing properties. The mechanism equations were gained. The volatile releasing properties were also studied using the isothermal muffle furnace. The results showed that the moisture releasing process was affected by temperature and particle size,which dramatically hampered the heat and mass transfer but it could be modified by increasing temperature. Due to different moisture storage forms,two stages existed during the low heating temperature dewatering process,corresponding to different kinds of moisture releasing and mechanisms. Whereas dewatering under the relative high temperature was not complex. The appropriate condition for dewatering was that,the temperature ranged from 150 ℃ to200 ℃ and the coal particle size was below 15 mm. The volatile releasing process,which was mainly related to the temperature,lasted from200 ℃ to 1 000 ℃,and enhanced after 400 ℃. Besides,the releasing amount increased with the temperature rising,then increased gradually unobvious at high temperature.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 1230K]

  • Preparation of additive for coal water slurry based on compound of sodium ligninsulfonate and dispersing agent NNO

    ZHOU Wenshu;WANG Shenghui;JIANG Tingshun;Jingjiang College of Jiangsu University;School of Chemistry and Chemical Engineering,Jiangsu University;

    In order to improve performance of coal water slurry( CWS),a novel additive for CWS was prepared based on the compound of sodium ligninsulfonate to dispersing agent NNO. The compound proportion of sodium ligninsulfonate and dispersing agent NNO,amount of additive and grading of different particle size were optimized. It was found that the CWS had better stability and liquidity when the ratio of sodium ligninsulfonate to dispersing agent NNO was 1 ∶ 2,the additive amount was 0. 8%,and the proportion of different sizes of coal particles( 0. 25 mm,0. 18 mm,0. 12 mm) was 1 ∶ 2 ∶ 3. 5. After letting set for one day or three days,the stability and liquidity were good. In addition,the effects of temperature on CWS properties were studied. A linear relationship between viscosity of CWS and napierian logarithm of temperature( ln T) was also observed. The viscosity of CWS decreased significantly as the temperature rose.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 476K]

  • Application of Fe-CN_x composite in direct coal liquefaction

    LI Yonglun;LIU Qi;XIE Jing;LI Kejian;WANG Lijun;Shanghai Research Institute,China Shenhua Coal to Liquid and Chemical Co.,Ltd.;School of Environment and Materials Engineering,Shanghai Second Polytechnic University;

    In order to improve catalytic performance of " 863" catalyst in direct coal liquefaction,a N-doped carbon nanotubes( CNx) was synthesized by chemical vapor deposition( CVD) using diethylamine as carbon source and nitrogen source,Fe / Na Y as catalyst. The FeCNxcomposite was obtained by impregnation of CNxin Fe SO4 solution. The structure and surface morphology of CNxwere characterized by Ranman spectra,X ray diffraction( XRD) and scanning electron microscopy( SEM). The catalytic performances of Fe- CNxwhich was used as catalyst promoter and catalyst in direct coal liquefaction were investigated. The results showed that the N-doped carbon nanotubes,with diameter of 50 ~ 100 nm and high degree of graphitization,were efficiently synthesized. The results of direct coal liquefaction indicated that the catalytic performance was equivalent to that of the " 863" catalyst when using 0. 3% Fe-CNxas unique catalyst,and the conversion rate of coal and oil yield could be increased by 1. 54% and 3. 42% respectively when only using 0. 1% Fe- CNxas promoters for " 863" catalyst.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 825K]

  • Measurement of carbon content in MTO catalysts by integrating sphere ultraviolet spectrophotometer method

    JIANG Xingjian;LIU Wenxing;ZHANG Feng;SUN Renhui;Shenhua Baotou Coal Chemical Co.,Ltd.;National Institute of Clean-and-Low-Carbon Energy;

    In order to measure carbon content rapidly and accurately,the integrating sphere ultraviolet diffuse reflection spectra of regenerated catalysts and spent catalysts which had different carbon contents were studied. The results showed that,the catalyst carbon content and its ultraviolet diffuse reflectance had a linear relationship. The standard curve of carbon content-reflectance was determined by the study.To measure catalyst carbon content,compared to the results of high frequency induction infrared absorption method,the measurement results using reflectance method had a deviation of less than 3%. The reflectance method had a high analysis speed,and it was suitable for industrialized catalyst carbon content analysis.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 230K]

  • Rapid determination of hydrocarbon group-type compositions of coal-derived naphtha by liquid chromatography

    LI Junfang;DU Shufeng;ZHANG Xiaojing;MAO Xuefeng;LI Peilin;Beijing Research Institute of Coal Chemistry,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 determine hydrocarbon group-type compositions of coal-derived naphtha rapidly,an effective method was developed by high performance liquid chromatography( HPLC). Taking NH2 column as stationary phase,N-hexane as mobile phase,the separation process was detected by a differential refractive index detector,the sample was separated into saturated hydrocarbon and aromatic hydrocarbon. The response factor of each group compound was determined by standard substance. The accuracy and precision of experimental results were analyzed. The results showed that,the testing speed of the method was only 6 min,the accuracy of each component of standard deviation was below 0. 2,the accuracy of relative standard deviation was under 2%,the accuracy of maximum relative deviation was3. 74%. By contrasting data with Gas-Chromatography,the relative deviation was below 5%. It showed HPLC had high precision and accuracy,using the method to measure saturated hydrocarbon and aromatic hydrocarbon of coal-derived naphtha was feasible.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 275K]

  • Ultrasonic extraction of phenolic compounds from light oil of medium and low temperature coal tar

    GAO Pingqiang;QIAO Zaili;ZHANG Yan;LU Cuiying;School of Chemistry and Chemical Engineering,Yulin University;Yulin Bureau of Quality and Technical Supervision;

    In order to improve utilization rate of medium and low temperature coal tar and reduce environmental pollution,phenolic compounds extraction experiments were conducted. The light oil in medium and low temperature coal tar was adopted as raw material which were extracted by ultrasonic extraction technique,glycerin solution was selected as extractant. The operation condition,such as mass ratio of glycerin to feedstock,content of glycerin solution,and temperature were studied by orthogonal test( L934) when the ultrasonic frequency was 25 k Hz. Glycerin addition was the greatest impact on extraction rate,followed by the content of glycerin solution and temperature. The optional extraction conditions were that,the mass ratio of glycerin to feedstock was 3. 5 ∶ 1,the water content of glycerin solution was 25%,the temperature was 55 ℃,the ultrasonic frequency was 25 k Hz. Under the optional conditions,the extraction rate was 93. 9%.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 408K]

  • Rheological properties of coal oil mixture

    HE Jing;WANG Yongwei;WANG Manxue;MA Bin;GUO Jintao;SUI Xiaorui;Shannxi Yanchang Petroleum(Group) Co.,Ltd.;College of Chemical Engineering,Xi'an Shiyou University;

    The coal oil mixture was easy to settle in transportation and it also was unable to pulp. In order to resolve those problems,the influence of coal,swelling time,additive amount of pulverized coal,particle size and temperature on the performance of coal oil mixture during direct coal liquefaction were studied. The results showed that,the coal oil mixture was pseudoplastic fluid and exhibited excellent shear thinning properties. A DG41 Ti was adopted in the experiment. With the extension of swelling time,the viscosity increased from 60 m Pa·s at 2 hours to 100 m Pa·s at 24 hours. With the rise of temperature,the viscosity which decreased from 1 200 m Pa·s to 130 m Pa·s presented a 89. 17% decline. Keeping the oil content unchanged,the maximum consumption of pulverized coal increased by 45%.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 725K]

  • Rheological properties of FCC slurry using as coal-oil co-processing solvent

    WANG Xueyun;ZHANG Xiaojing;CHEN Yafei;MAO Xuefeng;YAN Bingfeng;Beijing Research Institute of Coal Chemistry,Coal Science and Technology 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 prevent settling and lower resistance in the process of coal-oil slurry conveying,under atmospheric pressure and low temperature,many different influencing factors of coal- oil slurry viscosity were studied,including solvent properties,coal particle size,swelling,shear rate and concentration of coal-oil slurry,preparation time,temperature and so on. The experimental results showed that,the viscosity of coal-oil slurry increased by increasing solvent viscosity and coal-oil slurry concentration,adding catalyst and cocatalyst. The viscosity of coal-oil slurry decreased by increasing coal particle size. When the coal-oil slurry concentration was greater than 30%,the viscosity of coal-oil slurry decreased with the increase of shear rate. The volume concentration of coal-oil slurry increased after swelling in solvent,which led to the increase of coal-oil slurry viscosity. The temperature had a great influence on coal-oil slurry viscosity,and it decreased with the increase of temperature. The relationship between coal-oil slurry viscosity and temperature presented certain quantitative relationship under atmospheric pressure and low temperature.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 1147K]

  • Life cycle assessment of sludge coal water slurry

    REN Shihua;Coal Strategic Planning Research Institute,China Coal Research Institute;

    In order to objectively evaluate the comprehensive effects of sludge coal water slurry( S- CWS),a comprehensive evaluation model of whole life cycle was built,which took 1 t steam supply as ultimate goal to evaluate technological function,economic performance and environmental benefits of S-CWS pathway including coal and sludge preparation,S-CWS produce,S-CWS utilization). The evaluation indicated that the energy efficiency of S-CWS pathway was 85. 40%,the whole process consumed 135. 69 kg coal,32. 94 kg sludge and 487. 44 kg water,total investment was RMB 8. 10 yuan,total costs were RMB 129. 08 yuan. Discharges of wastewater,smoke and dust,SO2,NOxfrom S-CWS pathway were almost equal to those from CWS pathway.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 316K]

  • Heat transfer analysis of outside air duct of double tapered burner

    LIU Zhenyu;ZHANG Xin;CHENG Xiaolei;SHANG Qingyu;Coal Science and Technology Research Institute Co.,Ltd.;State Key Laboratory of Coal Mining and Clean Utilization;National Energy Technology & Equipment Laboratory of Coal Utilization and Emission Control;

    In order to solve the overheating problem of external wall which was installed in burner of pulverized coal industrial boiler,the heat transfer of outside air duct was analyzed by numerical simulation. The simulation results reflected the actual situation accurately,the outer wall of front cone was in a strip temperature zone,and the maximum temperature point was located at the opposite side of inlet. The actual temperature distribution was more uniform than the simulation results due to the tangential heat conduction of outer wall surface. At the rated load scope of 50% to 100%,with the decrease of burner load,the shell temperature increased significantly. This was because long residence time led to long combustion process. The add of reflux baffle and insulation layer could effectively control the heat accumulation problem,while the reflux baffle increased secondary air resistance,the insulation layer increased the temperature of air cooling front cone rised.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 1234K]

  • Effects of operating parameters on fluidization combustion process of coal water slurry

    LIU Siyu;LIU Anyuan;MA Yufeng;School of Energy Engineering,Zhejiang University;School of Pipeline and Civil Engineering,China University of Petroleum;Shengli Power Plant,Sinopec Group;

    In order to understand the fluidization combustion process of CWS deeply,combining two-phase flow and heat transfer,pyrolysis of CWS,combustion of volatile and char and pollution generation models,the comprehensive mathematical model for fluidization combustion process of CWS was established on the basis of compartments. By means of the model,the axial changing characteristics of some parameters in the furnace were simulated and analyzed when the operating parameters of boilers changed. The results showed that,compared with the temperature of furnace bottom of coal- fired fluidized bed boiler,that of CWS boiler was obviously lower. Higher boiler load and furnace temperature as well as higher volatile of coal helped to create better combustion condition. The influence of excess air coefficient on combustion was not monotonic function.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 978K]

  • Combustion characteristics of blue-coke as fuel for pulverized coal boiler

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

    In order to master the possibility of using blue-coke as fuel for pulverized coal boiler,the combustion tests of blue-coke were conducted on the one-dimensional flame furnace and pulverized coal ignition temperature test furnace. The results show that the proximate analysis,elemental analysis and calorific value of blue-coke were closed to anthracite. The ignition and burnout performance of blue-coke is superior to typical anthracite in China,but the corresponding performance is lower than raw coal. The slagging property of the two is similar. Overall,there are many differences in combustion performance among char and raw coal,anthracite. The blue-coke could be used as raw material or blending material for power plants.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 1020K]

  • Life cycle assessment of biomass briquette and lignite

    HAN Haizhong;YANG Fengling;KONG Huiru;CHENG Fangqin;Institute of Resources and Environment Engineering,Shanxi University;State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources;Coal Combustion Pollution Controlling and Utilization of Shanxi Province Key Laboratory;

    In order to investigate the influence of biomass briquette on environment and its energy consumption,the biomass briquette was compared with lignite from production to use by life cycle assessment. The results showed that the environment load index for biomass briquette was 0. 30,as for lignite,it was 0. 48. The environmental effects of biomass briquette were far lower than that of lignite. The influence of the two kinds of coal on environment mainly concentrated on the global warming,and CO2 was the main influencing factor. The emission of combustion process was the largest,so the emission reduction of combustion process was important.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 1102K]

  • Properties study of triotylamine on removing phenol of gasification wastewater

    WANG Jikun;WU Lixin;DONG Weiguo;Research Institute of Coal Chemistry,Coal Science and Technology Research Institute Co.,Ltd.;State Key Laboratory of Coal Mining and Clean Utilization;Coal Strategic Planning Research Institute,China Coal Research Institute;

    In order to obtain effective complexation extraction agent on removing phenol,triotylamine was selected as complexing agent,then the impact of different diluent on extraction was studied to determine the optimal complexation extraction agent. The influence of agent-water ratio,extraction stages,p H and temperature on the extraction was studied to determine the best process condition. The mechanism of complex extraction process was analyzed to guide extraction experiment. The results showed that extraction rate remained above 94% after four cross-flow extraction when 30% triotylamine-kerosene was extraction agent,and p H was less than or equal to 7,agent / water ratio was more than or equal to 1 ∶ 4,temperature was less than or equal to 25 ℃. The process of complex extraction was exothermic reaction and belonged to hydrogen-bonding association and ion association. The extraction ratio of trioctylamine and phenol was 1 ∶ 1,The resulting complex was Ph OH( R3NH+) or Ph OH·NR3.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 736K]

  • Process simulation with intercoolers for CO_2 absorption with a mixed amine solution

    ZHENG Yicheng;CHEN Jian;SHI Jianchao;HUANG Yongquan;State Key Laboratory of Chemical Engineering,Tsinghua University;Jiangsu Runfeng Environmental Engineering Ltd.;

    CO_2absorption with alkanolamines was the most commonly used CO_2 capture technology,while huge energy consumption limited its further application. In order to lower the energy consumption,intercoolers were added in the absorption tower. Process simulation was carried out with a commercial software AMSIM in the area of chemical engineering,and a mixed aqueous solvent of ethanolamine and methyldiethanolamine was used. Effects of intercooler positions,first and second intercooler heat amounts,lean amine solution flowrate and amine concentrations were analyzed. The results showed that energy consumption with the mixed solvent and intercoolers was deceased by17% compared with that of absorption process with the aqueous ethanolamine solvent and without intercoolers. The results showed that the integrated research on capture solvents and capture flowsheets could reduce energy consumption significantly.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 841K]

  • Characteristics of heavy metals emission during co-combustion of municipal sewage sludge and biomass

    JIA Hongjuan;REN Qiangqiang;WANG Xin;NA Yongjie;Institute of Engineering Thermal Physics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;

    Co-combustion of municipal sewage sludge( MSS) and biomass was proposed to solve heavy metal pollution problem. Experiments were conducted in a 5 k W fluidized bed combustor to investigate heavy metal characteristics containing contents distribution,speciation distribution and leachability. The results showed that the volatility of Cd and As decreased,the volatility of Pb,Cu and Cr increased,and the volatility of Hg had little change during co-combustion of MSS and biomass. For Zn,co-combustion of MSS and cotton straw reduced the volatility and co-combustion of MSS and wheat straw had little effect on the volatility. Co-combustion of MSS and biomass had different influence on the stability of different heavy metals in fly ash. Pb and As decreased,Zn increased,Cu and Cr had little change. Co-combustion of MSS and biomass also had different influence on the leachability of different heavy metals in fly ash. Compared with wheat straw and cotton straw,co-combustion of MSS and cotton straw was more advantageous to reduce the amount of leaching and toxicity of heavy metals in fly ash.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 736K]

  • Interpretation of norm system of energy consumption limits for modern coal chemical industry

    JIN Zehua;HU Ruisheng;GONG Xue;HU Jia'nan;DU Juan;LI Yingtong;LI Qiang;School Chemistry and Chemical Engineering,Inner Mongolia University;Institute of Petrochemical Supervision and Inspection in Inner Mongolia Hohhot,National Inspection and Test Center of Product in Natural Gas Chemical Industry;

    In order to promote the development of coal chemical industry,the latest issued norm system of energy consumption limits for the processes of coal to methanol,coal to coal water mixture,direct coal to oil,coal to synthetic nature gas and coal to olefin were analyzed from the aspects of technical requirements,statistical ranges and energy-saving means. Based on the status of modern coal chemical industry in China,there were still no norm system of energy consumption limits for the processes of indirect coal liquefaction,coal to ethylene glycol and lignite upgrading. For existing system,many places needed to be perfect.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 425K]

  • Taiyuan Formation sedimentary characteristics and coal correlation of Weisi mine field

    WEI Xiangcheng;HE Wei;XIE Bianning;YAN Lijia;Ningxia Mineral Institute of Geological Survey;

    In order to comprehensively master the seams distribution characteristics of Weisi mine field,the seams were compared from the aspects of sandstone and sedimentary series characteristics,interlamellar spacing,combination characteristic of coal seams and logging curve comparison. The No. 13 coal seam of Taiyuan Formation was determined as minable coal seam. The deposition of Taiyuan Formation exhibited a process of early regression,transgression and late regression. Most of coal seams formed in the two regression stages,and the main coal-forming environment was nearshore deltaic plain swamp which formed the main minable coal seams in the early regression. The largoon swamp formed coal streaks and thin seams.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 1458K]

  • Analysis of sulfur near-zero emissions control technology in new coal chemical projects

    XIONG Yinwu;Beijing Research Institute of Coal Chemistry,Coal Science and Technology Research Institute Co.,Ltd.;Beijing Key Laboratory of Coal Based Carbon Materials;State Key Laboratory of Coal Mining and Clean Utilization;

    In order to achieve near-zero emissions sulfur in new coal chemical projects,the principle,process and characteristic of coalburning gas purification technology with activated coke and coal gas desulfurization were introduced. SO2 could react with H2 S to form sulfur,so a combined process of activated coke flue gas purification and gas sulfur recovery technology was proposed. Sulfur material balance of process was calculated. The results showed that circular economy industry chain of sulfur recovery and utilization was established in 6×105t / a coal-to-olefin project. Sulfur recovery rate,new sulfur capacity,total sulfur and water saving was 85. 69%,50%,9 254 t / a and 6×105t / a respectively. Dry flue gas purification technology with activated coke could be used to remove SO2 and NOxin coal fired flue gas,which had better economic and environmental benefits.

    2016 02 v.22;No.102 [Abstract][OnlineView][HTML全文][Download 471K]
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