含灰烟气循环煤粉富氧燃烧中超细颗粒物生成特性研究  

Formation characteristics of ultra fine particles during oxy-coal combustion with flue gas recirculation

作　　者：尹国明 刘有飞 夏永俊 刘汉金[3] 刘念平[3] 邹仁 YIN Guoming;LIU Youfei;XIA Yongjun;LIU Hanjin;LIU Nianping;ZOU Ren(Electric Power Research Institute,State Grid Jiangxi Electric Power Co.,Ltd.,Nanchang 330096,China;State Grid Jiangxi Provincial Power Co.,Ltd.,Nanchang 330077,China;Huaneng Anyuan Power Generation Co.,Ltd.,Pingxiang 337200,China)

机构地区：[1]国网江西省电力有限公司电力科学研究院,江西南昌330096 [2]国网江西省电力有限公司,江西南昌330077 [3]华能安源发电有限责任公司,江西萍乡337200

出　　处：《热力发电》2018年第10期18-23,共6页Thermal Power Generation

基　　金：国家重点研发计划项目(2016YFB0600601)~~

摘　　要：在实验室高温沉降炉系统基础上搭建了模拟实际烟气循环的富氧燃烧台架,在无烟气循环、脱灰烟气循环和含灰烟气循环条件下对大同烟煤和神华烟煤燃烧时超细颗粒物的生成特性进行了实验研究。结果表明:与无烟气循环燃烧方式相比,脱灰烟气循环燃烧方式下两种煤的超细颗粒物生成量无显著差别,而含灰烟气循环燃烧方式下其生成量分别降低了约12.03%和7.73%;加入循环灰后,大同煤灰里的硅铝酸盐会捕集燃煤释放的K、Na等矿物蒸气,而神华煤灰里的CaO还会捕集燃煤释放的S,二者均会导致超细颗粒物生成量减少。On the basis of laboratory-scale high temperature drop tube furnace,an oxy-fuel combustion experimental apparatus was built up to simulate the real oxy-fuel combustion.Under conditions with three kinds of recycles(no-RFG,de-ash and ash),ultra fine particle formation experiments for DT bituminous coaland SH bituminous coal were carried out to investigate the influence of recycled ash on formation of ultrafine particle matters.The results show that,compared with the no-RFG condition,under condition with de-ash flue gas recycle,the yields of ultrafine particle matters of the DT and SH coal were both basically invariant,while that under condition with ash recycle decreased by about 12.03%(DT coal)and 7.73%(SH coal),respectively.Under condition with ash recycle,the silicon aluminate,which was rich in the ash of DT coal,would adsorb the Na and K vapor released during the combustion,and the rich CaO in the SH coal may also adsorb the S element during the combustion to restrain the S from migrating to the ultrafine particles,both of the reactions decreased the formation of the ultrafine particles.

关 键 词：煤燃烧 超细颗粒物 富氧燃烧 烟气循环 循环灰 硅铝酸盐 碱金属 固硫 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程] X513[环境科学与工程—环境工程]