双托盘技术对燃煤电厂重金属排放的影响探究  

Research of Double Tray Technology on Heavy Metal Emissions Control From Coal-fired Power Plants

作　　者：魏书洲 方灿 罗光前[1] 张军峰 刘海龙 李晓辉 赵永椿[1] 姚洪[1] WEI Shuzhou;FANG Can;LUO Guangqian;ZHANG Junfeng;LIU Hailong;LI Xiaohui;ZHAO Yongchun;YAO Hong(State Key Laboratory of Coal Combustion(Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China;Sanhe Power Generation Co.,Ltd.,Langfang 065000,Hebei Province,China)

机构地区：[1]煤燃烧国家重点实验室(华中科技大学),湖北省武汉市430074 [2]三河发电有限责任公司,河北省廊坊市065000

出　　处：《中国电机工程学报》2023年第5期1884-1890,共7页Proceedings of the CSEE

基　　金：国家重点研发计划(2018YFB0605103)。

摘　　要：为解决燃煤发电带来的污染物排放问题,针对二氧化硫、氮氧化物、烟尘的超低排放不断实施。但现有的净化装置对燃煤烟气中的重金属脱除效率不稳定,脱除效率不高。针对此问题,文中将湿法烟气脱硫系统中的托盘进行改造升级,在26000 m^(3)/h烟气中试台架上探究单、双托盘技术及不同喷淋强度对烟气中砷、硒、铅重金属的脱除性能,并对比不同的重金属浓度下重金属脱除性能。结果表明,加装双托盘后,WFGD装置对烟气中As、Se、Pb的脱除率均大幅度提高,脱除率>80%。In order to solve coal-fired power plant pollutant emissions,led by the government,ultra-low regulations of emissions of SO2,NOx and PM have been continuously implemented.However,the removal efficiency of heavy metals from flue coal fired flue gas is unstable and inefficient in existing purification facilities.To solve this problem,the perforated tray in the wet flue gas desulfurization(WFGD)system is reformed and upgraded.The removal performance of heavy metals including arsenic,selenium and lead in flue gas affected by single and double tray technologies and different spraying intensity is explored on 26000 m^(3)/h flue gas amount pilot-scale test bench,and the removal performance of heavy metals with different concentrations are compared.The results show that the removal efficiency of As,Se and Pb in flue gas by WFGD facility are all greatly improved and exceeds 80%in the double tray upgraded test.

关 键 词：湿法烟气脱硫装置 双托盘技术 喷淋层 重金属 

分 类 号：X511[环境科学与工程—环境工程]