洁净煤技术与可持续发展-第八届国际煤燃烧学术会议论文集 本书特色

本书反映了洁净煤技术的*新研究进展，包括基础研究、煤清洁燃烧技术、燃煤污染与超低排放控制技术、循环流化床燃烧技术、二氧化碳捕集与处理技术、煤与生物质混合燃烧技术、煤洁净燃烧的工业应用等。

洁净煤技术与可持续发展-第八届国际煤燃烧学术会议论文集 内容简介

本书获得2016年度“经典中国国际出版工程（China Classics International，CCI）”资助，是清华大学出版社与Springer联合出版的图书。本书主编岳光溪院士和李水清教授均任职于清华大学热能工程系。

洁净煤技术与可持续发展-第八届国际煤燃烧学术会议论文集 目录

Part I Invited Plenary SpeechesClean Coal Technology—For the Future Utilization. . . . . . . . . . . . . . . . . . . . . . . . . 3Keiji MakinoRegional Distribution of Renewable Energy and the Abundanceof Fossil Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Filip Johnsson, and Jan Kj?rstadPart II Basic Coal Quality and CombustionPhysicochemical Properties and Pyrolysis Characteristics of IndonesianLignite Upgraded by Organic Solvent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Liu Meng, Xu Chao, Li Jian, and Duan YufengCombustion Behavior of Low-Rank Coal Upgraded by DegradativeSolvent Extraction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Zong Zhang, Yi Xue, Xianqing Zhu, Xian Li, Hong Yao,and Kouichi MiuraA Quantitative Method for Determining the Primary Air Ratioin Coal-Fired Power Plant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Bin Zhang, Fang Yue, Yang Liu, and Peifang FuPhysicochemical Analysis of Hydrothermal Upgraded MunicipalSewage Sludge with Low-Rank Lignite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Li Jian, Liu Meng, Duan Yufeng, and Xu ChaoExperimental Study on Ash Melting Behavior of Xinjiang High-AlkaliCoal Blended with Low-Alkali Coal During Coal Combustion . . . . . . . . . . . . . . . . 53Xiang Zhang, Xiaojiang Wu, Xueyuan Xu, Jianwen Zhang, Kai Yan,Baiqian Dai, Jian Zhang, and Lian ZhangMolecular Dynamics Simulations Study of Brown Coal PyrolysisUsing ReaxFF Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Di-kun Hong, Hong-kuan Shu, Xin Guo, and Chu-guang ZhengExperimental and Numerical Analyses on Ignition and BurnoutCharacteristic of Low-Rank Lignite and Semi-Char Blends . . . . . . . . . . . . . . . . . . 69Ye Yuan, Shuiqing Li, and Qiang YaoMineral Matters in High-AAEM Zhundong Coal—In Comparisonwith High-calcium PRB Coal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75Yanmei Yang, Hai Zhang, Junfu Lu, and Yuxin WuThe Layered Structure of Ash Deposition in a 350 MW PC FurnaceBurning High Sodium–Calcium Lignite. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81Tao Yang, Xuebin Wang, Wenguang Li, Bo Wei, Yibin Wang,and Houzhang TaniiiMechanism Investigation on the Sulfation of Condensed Sodium Chlorideat 523–1023 K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87Zhongfa Hu, Lan Zhang, Qinglian Sang, Xuebin Wang, Zhao Wang,and Houzhang TanMechanisms of Inorganic Element Transfer During Zhundong Coal Combustionin Drop Tube Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95Bo Wei, Xuebin Wang, Xiaobing Qi, Yibin Wang, Zhongfa Hu,and Houzhang TanA Mechanism Study on the Decomposition of Sulfate in Zhundong Coalwith High Sulfur Content in Coal Ash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101Xuebin Wang, Hongying Wu, Shuanghui Deng, Lan Zhang, Bo Wei,and Houzhang TanLarge Eddy Simulation of the Sandia Flame E and F Using DynamicSecond-Order Moment Closure (DSMC) Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107Jianshan Yang, Kun Luo, Yun Bai, and JianRen FanSpace Program SJ-10 on Coal Combustion Research at Microgravity . . . . . . . . . . 113Chen Zuo, Bing Liu, Jialun Chen, Pei Zhang, Yu Qiao, Minghuo Xu,Qing Liu, and Hai ZhangFormation of Ash Aerosols and Ash Deposits of Coal Blends . . . . . . . . . . . . . . . . . 121Zhonghua Zhan, Sida Tian, Andrew R. Fry, and Jost O.L. WendtEffect of Ashing Temperature on the Physicochemical Propertiesof Zhundong Lignite Ashes Prepared in a Muffle Furnace . . . . . . . . . . . . . . . . . . . 133Jianbo Li, Mingming Zhu, Zhezi Zhang, and Dongke ZhangUpgrading of Lignite in a Tunnel-Type Microwave Oven . . . . . . . . . . . . . . . . . . . . 139Fan Zhou, Jun Cheng, Jianzhong Liu, Junhu Zhou, and Kefa CenPart III Pulverized Coal CombustionReal-Time Temperature Measurement Research on High-TemperatureGas of Large-Scale Power Plant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147Zhiwei Wang, Hongrui Li, Yifeng Wang, Baohua Du, and Dapeng WangNumerical Study of MILD Combustion for Pulverized Coal in O2/N2,O2/CO2, and O2/H2O Atmospheres. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157Yaojie Tu, Fanhai Kong, Kai Su, Hao Liu, and Chuguang ZhengCo-combustion Technology of Coal and Wood Waste . . . . . . . . . . . . . . . . . . . . . . . 165E.B. Zhukov, E.M. Puzirev, and K.V. MenyaevExperimental Study of Coal MILD Combustion at a Pilot-Scale Furnace . . . . . . . 173Zhihui Mao, Liqi Zhang, Xinyang Zhu, and Chuguang ZhengImproving the Efficiency of Fuel Combustion in Boilers with Windmill Fans . . . . 183Andrey Batukhtin, Sergey Ivanov, Sergey Batukhtin, and Maksim BassCharacteristics of Submicron Particulate Matters Formedin the Early Stage of Oxy-Fuel Coal Combustion. . . . . . . . . . . . . . . . . . . . . . . . . . . 189Qi Gao, Shuiqing Li, Ye Yuan, and Qiang YaoAirflow and Combustion Characteristics and NOx Formationof the Low-Volatile Coal-Fired Utility Boiler at Different Loads . . . . . . . . . . . . . . . 197Song Li, Zhichao Chen, Bingkun Jiang, Guangkui Liu, Zhengqi Li,Xiqian Zhang, and Qunyi Zhuiv ContentsMeasurements on Heat Flux Distribution in a SupercriticalArch-Fired Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207Dalong Zhang, Hang Shi, Chenwei Meng, Yuxin Wu, Hai Zhang, Wu Zhou,and Shenming RanCFD Modeling and Field Testing of a 600-MW Wall-Fired Boiler BurningLow-Volatile Bituminous Coal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213Shijian Luan, Zhanhua Ma, Heyang Wang, Yanjun Zhang, and Pisi LuResearch on Flue Gas Recirculation Coupled Air Staging in an IndustrialPulverized Coal Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221Gao-liang Li, Fang Niu, Yan-yan Gong, and Nai-ji WangArsenic Emissions and Speciations in High-temperature Treatmentof a Typical High Arsenic Coal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229Chong Tian, Junying Zhang, Rajender Gupta, Yongchun Zhao,and Chuguang ZhengTG-MS Study on Coal/Char Combustion by Equivalent CharacteristicSpectrum Analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235Zhiqiang Gong, Hongde Xia, Zhicheng Liu, and Qinggang LuNumerical Simulation of Combustion Characteristics and Heat FluxDistribution in a 600-MW Arch-Fired Boiler with Different PrimaryAir Injection Angles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241Zhang Dalong, Li Zhouhang, Zhang Hai, Wu Yuxin, Lu Junfu,Zhang Man, Zhou Wu, and Ran ShenmingPart IV Fluidized Bed CombustionAnalysis of Coarse and Fine Particles Exchange in a Parallel Double-VelocityDouble-Fluidized Bed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251Q.H. Wang, D.C. Song, Q. Guo, Y. Yang, W. Shuang, and X.F. LuNumerical Simulation for a CFB Boiler’s Cyclone Separatorwith Structure Optimizations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257Q. Guo, Q.H. Wang, X.F. Lu, P.Y. Ji, and Y.H. KangExperimental Study on Combustion Characteristics of ExtremelyLow Calorific Solid Wastes in a Fluidized Bed Combustor . . . . . . . . . . . . . . . . . . . 265Y. Yang, X.F. Lu, L. Mei, Q.H. Wang, Y. Hong, and D.C. SongResearch and Application of the Material Balance Online Supervisionfor CFB Boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275Wang Zhiwei, Wang Yifeng, and Chen XincanThe Operation of the 600-MW Super-Critical CFB Boiler Unit . . . . . . . . . . . . . . . 283Shengwei Xin, Xinghua Li, Wengqing Zhang, and Jun TangCFD–DEM Modeling of O2/CO2 Char Combustion in a Fluidized Bed . . . . . . . . . 287Yaming Zhuang, Xiaoping Chen, Daoyin Liu, and Changsheng BuCombustion Characteristics in 2 MWe-Class CFBC KIER Power Plant . . . . . . . . 295Jusoo Hyun, and Yuntae HwangEffects of Cyclone Structures on the Pressure Drop Across Different Sectionsin Cyclone Under Gas–Solid Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301Y. Huang, X. Mo, H. Yang, M. Zhang, and J. LvFlow Properties of Coal and Biomass on Recurrence Plot Method . . . . . . . . . . . . . 309Feihong Guo, Zhaoping Zhong, Heng Wang, Zeyu Xue, and Jin ZhangContents v3-Dimensional Particle Tracking in a Fluid Dynamically Downscaled FluidizedBed Using Magnetoresistive Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317Erik Sette, Anna K?hler, David Pallarès, and Filip JohnssonPart V Special for CO2 Issues-CCSDynamic Simulation and Control Design for Pulverized-Coal-FiredOxy-Combustion Power Plants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325Bo Jin, Haibo Zhao, and Chuguang ZhengAnalysis of Sensitivity and Optimization Potential for Oxy-Fuel Plant System. . . . 335Kai Yan, Xiaojiang Wu, Lian Zhang, Andrew Hoadley, Xueyuan Xu,and Jianwen ZhangHigh-Performance of SATS-Derived CaO/TiO2–Al2O3 Sorbentfor CO2 Capture in Batch Fluidized Bed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341Weiwei Peng, Zuwei Xu, and Haibo ZhaoCCSEM Analysis of Ash from Oxyfuel Combustion of Zhundong Coal . . . . . . . . . 347Tai Zhang, Zhaohui Liu, Xiaohong Huang, Qing Sun, Chao Liu,and Chuguang ZhengApplication of Carbon Capture to CO2 Emissions of Steel Plants. . . . . . . . . . . . . . 353K. Iwasa, M. Hodotsuka, X. Zhao, and K. SuzukiDynamic Modelling and Analysis of Supercritical Coal-Fired Power PlantIntegrated with Post-combustion CO2 Capture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359Akeem K. Olaleye, Eni Oko, Meihong Wang, and Gregg KelsallCO2 Capture Using Hollow Fiber Membrane Under Wet Ammonia-BasedDesulfurization Flue Gas Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365Lin Zhang, Bin Hu, Hao Wu, Xia Wang, Rui Liu, and Linjun YangA Low-Cost Chemical Absorption Scheme for 500,000 t/y CO2Capture Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373Hui He, Mengxiang Fang, Wei Yu, Qunyang Xiang, Tao Wang,and Zhongyang LuoPart VI Emission Characteristics and ControlsKinetics of Selenium and Cadmium Vaporization During Coal Combustionin a Fluidized Bed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381Fenghua Shen, Jing Liu, and Zhen ZhangFlue Gas Recirculation Impact on NOx Formation in TP-101-Type Boilerat Estonian Power Plant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387Vladimir Sidorkin, and Andrey TugovAbsorption of Sulfur Dioxide in a Transversal Flow Hollow Fiber MembraneContactor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393Hesheng Yu, Qinghai Li, Jesse Thé, and Zhongchao TanRemoval of Fine Particles from Coal Combustion by HeterogeneousCondensational Enlargement in Wet Flue Gas Desulfurization . . . . . . . . . . . . . . . . 401Wu Hao, and Yang LinjunCentral Mode Particulate Matter Control by Enhanced Liquid FormationUnder the Condition of Blended Coal Combustion. . . . . . . . . . . . . . . . . . . . . . . . . . 409Ping’an Zhang, Guangqian Luo, Dunxi Yu, and Hong Yaovi ContentsThe Evolution of Bimodal Size Distribution with Spatially InhomogeneousParticle Concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417M.L. Xie, T.T. Kong, and Q. HeNumerical Solution of a Modified Moment Model for Particle PopulationBalance Equation in the Continuum-Slip Regime. . . . . . . . . . . . . . . . . . . . . . . . . . . 423T.T. Kong, Q. He, and M.L. XieNon-Thermal Plasma-induced Flue Gas Cleaning: Fundamentalsand Industrial Demonstration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429S.R. Li, S. Wang, P. Han, L.H. Wang, and K.P. YanTechnical Progress for PM Emission Control from Coal-Fired Boilers. . . . . . . . . . 435C.Y. XiaoSimulation Study on the Demercuration Performance of Wet Flue GasDesulfurization System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 439Han Kunkun, Chi Guozhen, and Ni JianjunStudy on Fuel-N Conversion During Rapid Pyrolysis of Anthracitein CO2 at High Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445Qiongliang Zha, Jing Zhao, Chang’an Wang, Yinhe Liu, and Defu CheAnalysis of Influence of Air Distribution on the Reduction of NOx Emissionsin a 300-MWe Tangentially Lean Coal-Fired Boiler. . . . . . . . . . . . . . . . . . . . . . . . . 453Peng Zhao, Lushi Sun, Ben Wang, Jie Yu, Jun Xiang, Song Hu, Sheng Su,and Yi WangExperimental Study on the Stability of the Mercuric Complexesin Wet Flue Gas Desulfurization Wastewater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 467Yu Huang, Peng-shuai Han, Xin Guo, and Chu-guang ZhengEffect of CO2 on the Removal of NO Over Viscose-Based ActivatedCarbon Fibers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475Zean Wang, Deli Zhu, Fanhai Kong, Yuhang Zhong, Hao Liu,and Jianrong QiuThe Effect of Gas Temperature on Dust Resistivity and Removal Efficiencyin an Extra Cold-Side Electrostatic Precipitator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 483X.H. Zhang, S.Q. Li, G.L. Xiong, W. Huang, R.S. Luo, and J. GuoAirflow and Combustion Characteristics and NOx Formationof the Low-Volatile Coal-Fired Utility Boiler at Different Loads . . . . . . . . . . . . . . . 489Song Li, Zhichao Chen, Bingkun Jiang, Guangkui Liu,Zhengqi Li, Xiqian Zhang, and Qunyi ZhuAnalysis of Iron-Bearing Phase Components in Shenhua Coaland Their Combustion Transformation Products by Acid Separationand Mossbauer Spectroscopy Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 497Sida Tian, Yongxu Fang, Zhizhong Kang, and Yuqun ZhuoEffects of Flue Gas Cooler on the Reduction of “Gypsum Rain”in Coal-Fired Power Plants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503G.D. Li, Z.X. Sun, H.Q. Liu, H. Guo, and Z. YangExperimental Investigation on Slagging Grade of Zhundong CoalBased on 10 MW Combustion Test Bed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 509Wang Fengjun, Liu Hengyu, Zuo Guohua, and Guan JingyuFine Particle Characteristics from Limestone–GypsumDesulfurization Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515Pan Danping, Huang Rongting, and Yang LinjunContents viiStudy on Mechanisms of Aerosol Formation in Wet Ammonia-BasedDesulfurization Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521Liu Yaming, Huang Rongting, Pan Danping, Xu Qisheng, and Yang LinjunPart VII Industrial Application and Coal UseA Simplified Equilibrium Model for Simulating Entrained Flow Gasifiers. . . . . . . 531Zhen Liu, Jiansheng Zhang, and Fenghua ZhangNumerical Study of the Multiphase Gas–Solid Flowby a TFM-DEM Hybrid Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 541Q.G. Wang, W.D. Yin, J.F. Lu, and H.R. YangInvestigation of Coal Reactivity Effects on a 1000-MWTangential Coal-Firing Boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547Meng Chenwei, Wu Yuxin, Zhang Hai, Zhang Dalong, and Lv JunfuDerivation of Low-temperature Coal Oxidation Kinetics from Non-steadyHeat Generation Rate Measured by Isothermal Calorimetry. . . . . . . . . . . . . . . . . . 553Bo Li, Hui Zhang, and Changdong ShengDetection Technique of SO3 Content in Coal-Fired Flue Gasand Accuracy Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 563Ding Yang, and Fang ZhengMixing Enhancement of Ammonia and Flue Gas in the SCR DeNOx System . . . . 567Yang ding, Su Yinbiao, Wen Qingyun, Zheng Hao, and Ye XinglianModeling of Cold Flow Field in an Entrained-Flow Gasifierwith Single or Multiple Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575Z.Y. Feng, Z. Liu, X.H. Fang, F.H. Zhang, B.Z. Peng, and Z.J. GongNumerical Simulation of an Entrained Flow Gasifier by an Eulerian Model . . . . . 585H.P. Xu, H.B. Zhao, and C.G. ZhengCO2 Absorption/Desorption Enhanced by Nanoparticles in Post-combustionCO2 Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591W. Yu, T. Wang, M.X. Fang, H. Hei, and Z.Y. LuoDevelopment of Reduced Order Model for the HNCERI Gasifier. . . . . . . . . . . . . . 597Bo Zhang, Zhuyin Ren, and Shaoping ShiThe Promotion Mechanism of Silicon–Aluminum on the Decompositionof Sulfates in Biomass Ash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 603Lan Zhang, Zhongfa Hu, Juan Chen, Xuebin Wang, Bo Wei,and Houzhang TanCold-State Model Numerical Simulation of Coal Water Slurry Gasifier. . . . . . . . . 609Junjie Zhou, Quanguo Fang, and Tao DongDevelopment of High-Efficiency Coal Gasification Technology . . . . . . . . . . . . . . . . 617D. Ariyoshi, S. Takeda, K. Kosuge, M. Mizuno, and K. KatoDynamic Modelling, Validation and Analysis of Coal-fired SupercriticalOnce-through Boiler-Turbine-Generator Systems Under StringentUK Grid Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 621Akeem K. Olaleye, Meihong Wang, Chuanlong Xu, and Gregg KelsallThe Influence of Temperature and Residence Time on Tire Thermolysisin Subcritical and Supercritical Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629Fuxin Li, Aihong Meng, Qinghai Li, and Yanguo Zhangviii ContentsTechnical Characteristic of Coal-Fired Boiler Under the Rule of EnergyConservation and the Reduction of Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 635Fengjun Wang, Weiguo Weng, Ying Huang, and Shijian LuanThe High Efficiency and Clean Combustion of Coal Based on GeneralizedRegeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 639Weizhong Feng信息

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