2017年02期目次

  • Research advances in reduction mechanism and kinetics of iron-based Fisher-Tropsch catalyst

    Wang Xianghui;Men Zhuowu;Lyu Yijun;Li Yonglong;National Institute of Clean-and-Low-Carbon Energy;

    Fischer-Tropsch synthesis process,which has gradually entered the industrialization operation stage,is the key technology of indirect coal liquefaction process and an important direction of clean coal utilization technology.The development of catalyst with high activity,high selectivity and high stability is one of the key factors of the success of Fischer- Tropsch synthesis technology. Catalyst reduction process is an important process to obtain high performance catalysts,and the study of the reduction mechanism and reduction kinetics is the key issue to the process development. This paper introduced the research progress of reduction mechanism and reduction kinetics of Fischer-Tropsch synthesis catalysts,and discussed the effect of the calcination temperature,reducing atmosphere,reducing pressure and water partial pressure on the reduction mechanism and reduction kinetics.With the increase of calcination temperature of the catalyst,the superparamagnetic magnetic Fe~(3+) phase transforms to paramagnetic magnetic α-Fe_2O_3 phase,the lattice defects decreases,grain size increases,the activation energy and pre-exponential factor increases and the reducing ability of the catalyst decreases. With the increase of the partial pressure of CO in the reducing atmosphere,the degree of reduction and carbonization of the catalyst increases,more active centers forms on the surface of the catalyst,and the reducing ability of the catalyst increases.The increase of the reduction pressure promotes the reduction and carbonization of the catalyst,but the higher reduction pressure can inhibit the reduction and carbonization of the catalyst.The water pressure has no obvious effect on the reduction path of the catalyst,but the increase of water pressure can prevent the reduction of the catalyst,and the activation energy increases.According to the performance requirements to iron-based catalysts for Fischer-Tropsch synthesis technology,the research on catalyst reduction process should focus on the development of reduction process with middle temperature,syngas atmosphere and low pressure.It will reduce the investment and costs,shorten the reduction time,improve the catalytic activity and stability and improve the competitiveness of enterprises.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 162K]

  • Development thinking of energy conservation and environment protection of coal industry in the 13th Five-year plan

    Wu Xiaohua;China Coal Processing & Utilization Association;

    In order to accelerate the clean,efficient and low carbon utilization of coal,the development strategy of energy conservation,environmental protection and key tasks were proposed in this paper after analyzing the situation of energy conservation and environmental protection of coal industry in domestic and aboard based on the coal mine practice.During the period of 13 th Five-Year plan,under the guidance of innovation,coordination,green development,opening and sharing policy,the coal industry should implement green,cyclic and low carbon development.Six points are put forward to promote the development of coal industry in this paper,as efficient development by technological innovation and meticulous management,clean development by clean energy alternation,green development by total pollutant emission control,cyclic development by comprehensive utilization of waste resources,low carbon development by comprehensive utilization of low concentration gas,strengthening ecological restoration,management and developing the mining tourism.The priority works are prompting the industrialization of mine water,the comprehensive utilization of solid waste and coal mine gas,strengthening the ecological environment management and restoration,and constructing low carbon development system in mining area.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 133K]

  • Progress and prospects of denitration technology

    Miao Qiang;National Institute of Clean-and-Low-Carbon Energy;

    In order to summarize the research achievements and elucidate the development trend of denitration techniques,as well as to establish a systematic denitration technology with proprietary intellectual property rights in China,this paper overviewed the current progress of domestic and foreign denitration techniques,and introduced several typical dry and wet processes of flue gas denitration technology.Accordingly,the most mature denitration process is the selective catalytic reduction denitration( SCR) process,while the selective non catalytic reduction( SNCR),plasma technology,oxidation and absorption processes also have a certain prospect and potential. As the mainstream denitration process,the improvement of SCR technique will mainly focus on the process optimization,high performance SCR catalyst development,catalyst life extension,and catalyst regeneration. The combination or integration of different denitriation processes based on different mechanisms is one of the important developing directions of denitration technology,and the process combining denitration and desulfurization processes should be researched.The innovation of denitration mechanism,integration of multi-stage or multi section,and development of novel recycling and regenerating denitration catalyst and adsorbents will become hot topics in this field.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 142K]

  • Research progress and prospect of flotation kinetic model

    Zhu Zhibo;Zhu Shuquan;Chen Huiyun;Zhang Ke;School of Chemical & Environmental Engineering,China University of Mining and Technology( Beijing);

    To realize the automatic control and improve the efficiency of flotation,this paper summarized the development progress of flotation kinetic model,and introduced some practical flotation kinetic models. The current application of kinetic theory on flotation of metal minerals and coal slime was referred,thus the prospect of flotation kinetic models was systematically reviewed. Due to the extremely complex of flotation process,the flotation separation is impacted by many factors.as a result,the existing flotation kinetic models are only used to simulate some specific objectives,thus are limited to present various heterogeneities in one model,so as to be invalid for many refractory minerals.Elucidating the microscopic mechanism of the flotation process on the basis of flotation rate constant and law of parameters in flotation kinetic models by using the computer simulation technology is the premise of describing the actual flotation process accurately. It is also the development trend of flotation kinetic in the future.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 123K]

  • Structure characters and molecular structure models of low-rank bituminous coal macerals in northern Shaanxi

    Zhang Yang;Research Institute of Coal Chemistry,CCTEG Coal Research Institute;State Key Laboratory of Coal Mining and Clean Utilization;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;

    Vitrinite and inertinite concentrates,prepared by manual separation from Shanbei low rank bituminous coal,were analyzed using the ultimate analysis,FTIR,13C-NMR,and XRD. Molecular structure models of vitrinite and inertinite were proposed accordingly. Results indicate that the content of oxygen is higher,while sulfur is extremely low in both vitrinite and inertinite.Aromatic carbon ratio in vitrinite is 0.634 and the average number of condensation ring is 2.98,while they are 0.734 and 3.15 respectively in inertinite.The inertinite component exhibits higher condensation degree with larger aromatic nuclear size and more well-aligned structure than the vitrinite. Specification of relations between molecular structure and maceral group features from the viewpoint of molecular level will contribute to the high efficient and clean conversion of low-rank bituminous coals.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 263K]

  • Experimental research on spontaneous combustion and explosion characteristics of dried lignite

    Zhu Ziqi;Yang Zhongcan;Meng Yi;Yao Wei;Liu Tong;Yang Yali;Xi'an Thermal Power Research Institute Co.,Ltd.;School of Energy Power and Mechanical Engineering,North China Electric Power University;

    In order to prevent spontaneous combustion and explosion of lignite during stacking,the spontaneous combustion and explosion characteristic of lignite and its dried samples were investigated by using corresponding test beds. The results show that,the oxygen consumption rate increase by 0. 17%/min and 0. 11%/min respectively when the moisture of lignite reduces by 10% and the particle size decreases by one grade.The average mass concentration of coal dust lower explosion limit decrease by 0. 015 kg/m~3 and 0. 03 kg/m~3 respectively when the moisture of lignite reduces by 5% and the temperature increases by 10 ℃.Overall,the drier condition intensifies the risk of spontaneous combustion and explosion of lignite.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 302K]

  • Study on the gases compositions analysis of direct coal liquefaction by gas chromatography

    Zhu Xiaoman;Qu Bing'er;Research Institute of Coal Chemistry,CCTEG Coal Research Institute;State Key Laboratory of Coal Mining and Clean Utilization;College of Chemical and Biological Engineering,Zhejiang University;

    In order to make better utilization of the gaseous products of direct coal liquefaction,their components should be accurately determined.The factors influencing on the measurement were systematically studied.The gas chromatography was adopted to analyze the gases components of direct coal liquefaction,and the optimum analysis conditions were determined according to the results,that is,the temperature raises from 60 ℃ to 150 ℃ at a rate of 15 ℃ / min,and the initial and final temperatures are holding for 10 min and 4 min,respectively.Tedlar gas sampling bags are the best materials.The gases are divided into hydrocarbons and permanent gases,which are analyzed by the FID and TCD detectors,respectively,while helium is used as carrier gas at a rate of 38 m L / min.The split ratio of capillary column is 50 ∶1,and molecular sieve columns are without splitting.The relative deviation of 8 times repeated measurements are less than 3.5% and the recoveries are 97% ~ 102.03% indicating high precision and better repeatability of such method.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 232K]

  • Study on pyrolysis characteristics and dynamic parameters of Wulagai lignite

    Li Xingzhi;Fang Shunli;Yao Wei;Yang Zhongcan;Thermal Power Research Institute Co.,Ltd.;

    To obtain better process parameters of semi-coke for lignite,the effects of heating rate,temperature,atmosphere and particle size on pyrolysis characteristics and dynamic parameters of Wulagai lignite were investigated.The results show that the final pyrolysis temperature is the main influencing factor,the heating rate,pyrolysis atmosphere and particle size have little influence. When the final pyrolysis temperature increases from 350 ℃ to 600 ℃,The rejection index(RI) varies from 235 ℃ to 292 ℃,the burnout index(C_b) varies from4. 68 to 6. 15,the explosive index(K_d) decreases from 2.54 to 0.46,the activation energy( E) varies from 44.4 k J/mol to 63.4 k J/mol.In the above changes,the fire behaviour,burnout performance and explosive tendency of Wulagai lignite semi-coke become worse.The semicoke which is obtained at 520 ℃ pyrolysis temperature is easy to burn,burn out and difficult to explode,and the rejection index,the burnout index,the explosive index and the activation energy are 265 ℃,5.34,0.80,53.2 k J/mol.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 295K]

  • Study on the liquefaction kinetics of Shenhua coal at initial stage

    Wang Yong;Research Institute of Coal Chemistry,CCTEG Coal Research Institute;State Key Laboratory of Coal Mining and Clean Utilization;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control;

    In order to research liquefaction kinetics of Shenhua coal at initial stage,the direct liquefaction of Shenhua coal was carried out in a 180 m L stirring autoclave using "863"catalyst and coal derived recycle solvent.A traditional lumped kinetic model was used in this study.Accordingly,the coal sample was classified into fast converting part,slow converting part and inert part. Activation energy( Ea) of each first order reaction was calculated.Results show that the total reaction Eaof fast converting part is 279. 74 k J/mol,that of slow converted part to pre-asphaltenes and asphaltenes is 57. 80 k J/mol.In the first 4 minutes of reaction,the conversion rate and yield of preasphaltenes increase sharply,and in the sequent 4-15 minutes,the yield of PAA is approximately constant or slightly declines,meanwhile the oil yield gradually increases in the whole reaction.In addition,the research also suggests that the dissolved hydrogen demonstrates more important on production of hydrogen free-radicals when the conversion is more than 55%.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 302K]

  • Calculation methods of direct coal liquefaction using autoclave

    Yan Bingfeng;Research Institute of Coal Chemistry,CCTEG Coal Research Institute;State Key Laboratory of Coal Mining and Clean Utilization;

    Autoclave is commonly used test device for evaluating the performance of direct coal liquefaction.Due to autoclave products are hard to be completely sampled and measured,the inlet and outlet materials and ash are actually out of balance.The accuracy of experimental data on this basis is low,thus it is needed to make a reasonable adjustment of the materials and the ash to achieve the balance. The method to adjust the materials and ash to achieve balance was described,and on the basis of materials balance,oil yield formula of autoclave was modified.The results show that in order to ensure the real test data,the material balance of outlet and inlet is preferably more than 95%,and the ash balance is preferably 90%-110%.The commonly used formula for calculating oil yield is revised.The oil yield calculated by the modified oil yield formula is 1. 14% to 3. 42% higher than that without modification.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 150K]

  • Co-combustion characteristics and kinetics of coal,oil shale and petroleum coke

    Tian Hong;Liao Zhengzhu;College of Mechanical and Electrical Engineering,Guangdong University of Petrochemical Technology;

    In order to efficiently utilize the low-grade fuel oil shale and high-sulfur petroleum coke,the coals were mixed with low-grade fuel oil shale and high-sulfur petroleum coke in different proportions.The co-combustion characteristics and mechanism were analyzed by TG-DTG-DSC and Freeman-Carroll method. The combustion characteristics parameter and kinetics parameters were investigated. Results show that the DTG curves of S7 with mass mixing ratio of coal,oil shale and petroleum coke being 1 ∶ 6 ∶ 3 present peaks from combustion of released volatile and residual fixed carbon.The sample S4 with mass mixing ratio of coal,oil shale and petroleum coke being 6 ∶ 3 ∶ 1demonstrates greater combustible properties and ignition characteristics index than the values of oil shale and petroleum coke.Burnout indexes of various mixed samples are greater than that of coal and petroleum coke,and synthetic combustion characteristics index of each mixed sample is larger than the synthetic combustion characteristics index of the oil shale.While the activation energy of S4 is minimum,thus the combustion reaction of it is most easily to occur.In summary,mixed combustion characteristics are better than the independent combustion characteristics of oil shale or petroleum coke,which is feasible to solve the difficult of combustion of oil shale and petroleum coke separately.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 309K]

  • Influence factors of the viscosity measurement of coal slurry for pipeline transportation

    Tu Zhaomei;CCTEG Wuhan Engineering Co.,Ltd.;

    In order to investigate the effect of measurement method,particle size distribution,mass concentration and temperature on the viscosity of coal slurry for pipeline transportation,coal slurry samples from Shaanxi Shennan mining area were systematically studied. Results show that the viscosity measured using rotary viscometer is 30% higher than that measured by capillary viscometer.The apparent viscosity increases with increase of proportion of Ⅳ-grain size range and mass concentration,while decreases with increase of temperature.The viscosity measurement concerning on the piping transportation of coal slurry should comprehensively consider the impacts from the measurement method,particle size distribution,mass concentration and temperature.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 148K]

  • Combustion and self-ignition characteristics of Shengli lignite with different drying degrees

    Hao Junzhong;Wang Zhichao;Yao Wei;Inner Mongolia Shangdu Power Generation Co.,Ltd.;Xi'an Thermal Power Research Institute Co.,Ltd.;

    In order to investigate the change of combustion and self-ignition characteristics of high moisture lignite under different drying degrees,a one-dimensional flame combustion furnace,a pulverized coal ignition temperature examining furnace and a coal self-ignition analyzing apparatus were used to test the combustion performance of Shengli lignite.Results show that the ignition temperature decreases with the increase of the drying degree,while increases with the rising of the air / coal ratio.The fineness of pulverized coal will also affect the ignition temperature.When burning with the drying lignite,a higher primary air rate should be adopted to improve the safety of coal pulverizing system.Shengli lignite raw coal and the dried samples are very easy to be burn- out,and the burn- out rates are above 99. 4%. The change of moisture has little effect on the burn- out rate. The suggested operational oxygen supply is approximate 3. 5% for burning the Shengli lignite and its 20% moisture drying lignite.The lignite with deeper drying degree and smaller particle size is easier to be self-ignition.The excessive drying with the moisture content less than 20% will bring higher risk of self-ignition.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 269K]

  • Combustion features of Shenfu pulverized coal

    Li Zenglin;Liu Ruili;Pang Qingtao;Cao Wen;Zhao Peng;Yan Xilong;Shaanxi Coal and Chemical Industry New Energy Group Co.,Ltd.;

    In order to provide a theoretical basis for coal-fired boiler utilization,pulverized coal produced from coal-fired boiler blending with Shenfu coal was investigated.Combustion characteristic of pulverized coal was studied by TG-DTG,and the influence of coal powder and heating rate on the combustion feature were also analyzed. Results show that under air atmosphere,the TG-DTG curves shift to high temperatures region with the increase of heating rate,and the ignition temperature,maximum weight loss rate,burnout index,as well as maximum weight loss temperature increase.The change of particle size and ash content demonstrates less effect on the ignition temperature at heating rate of 10 ℃ / min or 20 ℃ / min.While,it affects the burnout index and comprehensive combustion features. the comprehensive combustion features of D coal is 1.51,which is better than that of the pulverized coal P with particle size of 74 μm and ash of 9.5%.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 174K]

  • Effect of two different stabilizers on stability of water coke slurry

    Qian Ningbo;Shi Zhihong;Chen Runjiang;Yu Wuer;Fan Chaoyao;Ningbo Economic and Technological Development Zone Thermal Power Co.,Ltd.;

    The purpose of this article is to enhance the stability of water coke slurry,two kinds of stabilizers was added into water coke slurry to investigate their effects on the apparent viscosity and stability of the slurry.Results show that the apparent viscosity of slurry increase from 873 m Pa·s to 1 039 m Pa·s and the ratio of water separation decrease from 11.61% to 8.57% when mixed A at the dose of 0. 3%.Likewise,the apparent viscosity of slurry increase from 891 m Pa · s to 1 187 m Pa · s and the ratio of water separation decrease from6. 30% to 3. 45% when mixed B at the same dose of 0.3%.Both of the two kinds of stabilizers can significantly improve the stability of the slurry and increase the apparent viscosity of slurry,while the ratio of water separation was decreased with gradually addition of two kinds of stabilizers.The effect of stability of B was better than A to the apparent viscosity and stability of slurry,which was lower by adding 0.3% B than that by adding 0.6%.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 1079K]

  • Calculation method of energy consumption in synthesis gas purification unit

    Gao Lijuan;Li Chufu;Yao Jinsong;Zhang Feng;National Institute of Clean and-Low-Carbon Energy;

    In order to optimize the energy system of a coal to olefin plant,a segmented progressive and collaborative optimization strategy was proposed based on unit,subsystem and globally.It was found that the standard coal coefficient of water vapor in crude synthesis gas was no unified benchmark with the synthesis gas purification unit energy consumption analysis and calculation. Thus the calculation method of unit energy consumption in synthesis gas purification unit was studied.The calculation method of energy consumption in synthesis gas purification unit was proposed.The method provided how to select the standard coal coefficient of water vapor in the crude synthesis gas and the calculation base of unit energy consumption.It provides a standard calculation for benchmarking analysis of synthesis gas purification unit and provides reference for the calculation standard draft of energy consumption of synthetic gas purification unit.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 113K]

  • Economic analysis for a 135 MW pulverized coal fired boiler blending with semi-coke

    Liu Jiali;Guo Mengshi;Li Yan;Xi'an Thermal Power Research Institute Co.,Ltd.;

    In order to promote the application of semi-coke on large-scale pulverized coal fired boiler,the impacts of coal blending with semi-coke on the operational economic of power plant such as the boiler gross efficiency,the station service power consumption rate,the net coal consumption,the environmental protection indicators,maintenance cost,and coal price etc were systematically analyzed by testing the performance of coal blending on a 135 MW power plant.Results show that coal blending with 30% semi-coke has little effect on the operational economic,and it demonstrates less than 1% impact on the power supply cost,while the price of semi-coke is the main factor affecting the widely application of semi-coke on power plant.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 115K]

  • Study on the automatic dosing system of coal slurry based on photoelectric measurement

    Deng Jianjun;Zhang Xiaozhu;Lin Zhe;Wang Chuanzhen;Gu Jiahuan;Wang Zhangguo;School of Chemical Engineering & Technology,China University of Mining and Technology;

    In order to achieve automatic adding flocculant in the coal slurry processing,the equipment of coal slurry automatic dosing used in the laboratory was developed. The transfer function of the experimental equipment was obtained through a series of exploratory experiments,and the transfer function was simulated by the simulation software,and they were compared with the experimental results to determine the feasibility of the device.Results show that the settling velocity is 10-12 mm / s in different concentration of coal slurry under the best dosage condition.In the simulation,the settling velocity is stable at 10 mm / s when the agent reaches the optimal dosage. The experimental results are basically consistent with the simulation results,and further,once the interference occurs,the system can automatically adjust and stabilize.The automatic dosing system has introduced the photoelectric measurement technology,which measures the settling velocity with the photoelectric sensor and has solved the lag problem of traditional automatic dosing system with the combination of feed forward and feedback control scheme.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 453K]

  • Preparation of aromatic hydrocarbons by reforming naphtha fraction from Shenfu direct coal liquefaction oil

    Huang Peng;Research Institute of Coal Chemistry,CCTEG Coal Research Institute;State Key Laboratory of Coal Mining and Clean Utilization;

    Naphtha fraction( <200 ℃) from direct coal liquefaction( DCL) oil possessing high proportion of aromatic hydrocarbon is a potential feedstock to prepare aromatic hydrocarbons.The naphtha from the light fraction( <200 ℃) after sulrry-bed hydrocraking was used as the raw material.Primarily,the sulfur and nitrogen in raw material were reduced to less than 1 mg / kg by hydrorefining to meet the requirement of hydrorefoming.Subsequentially,hydroreforming experiments were carried out on a bench-scale fixed-bed continuous flow reactor for preparation of aromatics.The changes of group components and the yields of main aromatic compounds were investigated. Results show that n-alkane isomerization reaction is dominating during the hydroreforming process,that is,the naphthenics are converted to aromatics via dehydrogenation and aromatization.The naphtha fraction from DCL oil is available for catalytic reforming with C_1-C_4 hydrocarbon and hydrogen yield of 6. 03% and 3. 6%,respectively. The content of aromatic hydrocarbons reaches to 83. 2% after reforming,and which contain 61.3% of C_6-C_8 aromatics hydrocarbon.It is considered be feasible resources to extract BTX.To some extent,the yield of the aromatic hydrocarbons is influenced by the distillation range of naphtha.Roughly,the 60-160 ℃ is an appropriate range in this study.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 245K]

  • Technical economic study on type selection of slag cooler for a 660 MW ultra-supercritical CFB boiler

    Wu Wanzhu;Shenhua Group CFB Technology R&D Center;

    To compare the effects of different types of slag cooler on energy consumption of 660 MW ultra-supercritical CFB boiler,the variation of the efficiency and the power consumption of the plant using air-water combined slag cooler and the roller slag cooler were analyzed,then the amount of coal consumption of the unit with different slag coolers was calculated.A selection scheme of the slag cooler was proposed.Different schemes were compared.The results indicates that the slag quantity and standard coal price of the unit have an important effect on the selection of slag cooler.With standard coal price and slag quantity increases,the economy of the unit with air-water combined slag cooler is better than that with rolling ash cooler.Considering technical economy and reliability of the slag cooler,the scheme of mix-using air-water combined slag cooler and the rouing ash cooler is recommended.The research provides reference for the type selection of slag cooler in a CFB boiler burning low calorific value coal.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 143K]

  • Study on SO_2 ultra low emission technology on circulating fluidized bed boiler

    Wu Youfu;Shenhua ( Fujian) Energy Co.,Ltd.;

    According to the characteristics of low pollutant content of circulating fluidized bed boiler,this study analyzed the factors influencing on the production of boiler SO_2 and compared the advantages and drawbacks of different desulfurization processes.Based on the experimental results and engineering application examples,the paper put forward the strategy for realizing the ultra low emission of SO_2. Results show that the actual emission value of SO_2 depends on the proportion of totally combustible sulfur in coal and the content of alkali metal oxide( such as Ca O) in coal ash as well as the operating parameters of the boiler.Among the operating parameters,the bed temperature is the most important factor.By using the reasonable operation parameters,optimizing the dry desulfurization process and combining with flue gas desulfurization process can achieve the goal of deep desulfurization.Regarding to the selection of flue gas desulfurization process,CFB-FGD semi-dry desulfurization process has a greater economic advantage than the Limestone-gypsum wet desulfurization process.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 194K]

  • Study on the low concentration gas fuel cell power generation technology

    Qi Qingjie;Qi Yun;College of Safety Science and Engineering,Liaoning Technical University;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University;

    In order to solve the problem of air pollution caused by directly discharged exhausting mine gas with low concentration,a new technology that converted gas into electrical energy by oxidation-reduction reaction in gas fuel cells was proposed.The gas and oxygen were injected into the electrolytic cell via different electrodes.Chemical energy was thus converted into electrical energy through chemical reactions.Hereafter,the electric energy could be stored and utilized.Results show that the electrical energy produced by oxidation of gas in fuel cell is 50% higher than that from other forms.In addition,such technology also has the advantages of independent of gas concentration,humidity,impurities and other factors. It is also effectively overcoming some drawbacks of explosion power generation technology in internal-combustion engine for low concentration gas.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 260K]

  • Analysis of the utilization potential of coal mine methane

    Zhao Luzheng;Coal Strategic Planning Research Institute,China Coal Research Institute;

    In view of"11th Five-Year Plan"and "12th Five- Year Plan"period,the exploitation and utilization of coal mine methane( CMM) is far from the planning goal,especially the underground extraction efficiency.Based on the analysis of influencing factors,including concentration and quantity of exploitation,utilization technology,utilization pattern,policy,and so on,the prediction model of exploitation and utilization was built.The utilization amount and utilization rate of CMM in "13th Five-Year Plan"was thus predicted by using scenario analysis method,and development goals were proposed.According to the calculation results,the CMM exploitation will reach 25. 7billion-28.9 billion cubic meters,and the utilization amount will be 14.8 billion- 17. 0 billion cubic meters,as well the utilization rate of CMM in the surface wells and underground coal seam will be beyond 80% and 45%,respectively.Eventually the total CMM utilization rate will be more than 58% in 2020.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 219K]

  • Properties and application of the environment-friend grease in Huainan coal fully mechanized mining supporter

    Wu Jing;Equipment Leasing Branch of Huainan Mining Group;

    In order to improve the reliability of hydraulic supporter of fully mechanized working face of coal mining operation,the selection and utilization of environment-friend oil in hydraulic system is necessary.The overall utilizing situation of hydraulic concentrate and emulsion oil was investigated,and the characteristics,advantages and drawbacks of grease used in the supporter were analyzed by tracing records in-situ and laboratory analysis.Results show that the environment-friend hydraulic concentrate is the raw material from the plant oil replacing mineral oil.Such hydraulic concentrate is with little pollution,biodegradable and harmless and non-stimulation to human body.It is benefit to coal green mining.The utilization of JISUO concentrate and FUCHS oil must be within the prescribed concentration( 3%-5%)under operational condition.The working condition would be affected by abnormal utilization of hydraulic concentrate.

    2017 02 v.23;No.108 [Abstract][OnlineView][HTML全文][Download 145K]
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