燃煤烟气活性炭喷射脱汞应用中给料喷嘴布置优化  

Optimal Arrangement of Feeding Injector for Coal-Fired Flue Gas Mercury Control by ACI

作　　者：郑逸武 汤红健 段钰锋[1] 金峰[2] Zheng Yiwu;Tang Hongjian;Duan Yufeng;Jin Feng(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096 [2]南京航空航天大学能源与动力学院,南京210016

出　　处：《燃烧科学与技术》2017年第4期339-343,共5页Journal of Combustion Science and Technology

基　　金：国家重点研发计划资助项目(2016YFB0600604);国家自然科学基金资助项目(51676041)

摘　　要：针对某燃煤电厂300,MW机组,借助CFD软件对喷射活性炭后烟道内的气固流场进行数值模拟,探究了不同喷嘴布置方案对活性炭颗粒的覆盖率、停留时间以及颗粒浓度场均匀性的影响.结果表明,采用9喷嘴布置方案时,活性炭喷射效果最佳,颗粒覆盖率达到了78.6%,,停留时间超过2,s,且颗粒浓度分布均匀性提高,满足活性炭喷射技术实际应用过程中活性炭高效脱汞的要求.Taking a300MW unit boiler as the research object,the CFD software was used to simulate the gassolidflow field after injecting activated carbon into the duct.The effects of different injector layout schemes onactivated carbon particulates coverage ratio,residence time and the uniformity of particle concentration distributionwere investigated.The results indicate that the activated carbon particulates coverage ratio in the duct reaches78.6%,and the residence time is longer than2,s when the scheme with9injectors is adopted.Moreover,the uniformityof the particle concentration distribution is the best.The simulation results meet the requirement of highdemercuration efficiency in the practical application of activated carbon injection.

关 键 词：烟气脱汞 活性炭喷射 喷嘴布置优化 数值模拟 

分 类 号：TK448.21[动力工程及工程热物理—动力机械及工程]