煤燃烧非常规污染物排放控制  

Emission control of unconventional pollutants during coal combustion

作　　者：张军营[1,2] 崔向峥 王志康 王建豪 肖日宏 熊卓 赵永椿[1,2] ZHANG Junying;CUI Xiangzheng;WANG Zhikang;WANG Jianhao;XIAO Rihong;XIONG Zhuo;ZHAO Yongchun(National Key Laboratory of Coal Combustion and Low Carbon Utilization,Huazhong University of Science and Technology,Wuhan 430074,China;National Environmental Protection Engineering Technology Center for Trace Elements Pollution Control and Low Carbon Utilization of Coal,Wuhan 430074,China;Wuhan Branch of National Energy Group Science and Technology Research Institute Co.,Ld.,Wuhan 430000,China)

机构地区：[1]华中科技大学煤燃烧与低碳利用全国重点实验室,湖北武汉430074 [2]国家环境保护燃煤低碳利用与重金属污染控制工程技术中心,湖北武汉430074 [3]国家能源集团科学技术研究院有限公司武汉分公司,湖北武汉430000

出　　处：《洁净煤技术》2023年第10期1-16,共16页Clean Coal Technology

基　　金：国家自然科学基金资助项目(42030807)。

摘　　要：随着工业的发展,环保和健康问题被日益重视。燃煤电厂是大气污染物的主要人为排放源之一,目前,我国针对粉尘、SO_(2)、NO_(x)等常规污染物的控制已达到国际领先水平。同时,针对燃煤过程产生的非常规污染物(PM_(2.5)、重金属、汞、SO_(3)、VOCs等)的排放控制成为当下研究的热点和难点。基于燃煤电厂非常规污染物的生成与排放特征,分析了当前尾部烟气净化装置和各种非常规污染物控制技术的优缺点及面临的挑战。针对5种典型的燃煤非常规污染物排放控制现状进行论述。首先,从多种团聚技术角度分析了煤燃烧PM_(2.5)排放控制现状;第二,从燃烧前、燃烧中和燃烧后3个角度分析了重金属排放控制现状,并阐述了异相凝并技术治理燃煤重金属污染的优势;第三,从碳基和非碳基吸附剂角度分析了汞排放控制现状,并强调了磁珠脱汞技术治理燃煤汞排放的示范效果;第四,从碱基吸附剂、化学团聚和非碱基吸附剂等角度分析了SO_(3)排放控制现状,并突出了非碱基吸附剂高温磺化脱除SO_(3)的创新性;第五,从尾部烟气净化装置和活性炭喷射技术角度分析了VOCs排放控制现状。此外,针对我国非常规污染物控制现状,提出适宜的污染物协同脱除方法,为今后燃煤电厂多污染物协同脱除技术的应用提供参考。With the development of industry,people are increasingly concerned about environmental protection and health issues.Coal-fired power plants are one of the main anthropogenic sources of atmospheric pollutants.Currently,China′s control of conventional pollutants such as dust,SO_2,and NO_(x)has reached international leading levels.At the same time,the control of unconventional pollutants generated during the coal combustion process,such as PM_(2.5),heavy metals,mercury,SO_3,and VOCs,has become a hot and challenging research topic.Based on the characteristics of the generation and emission of unconventional pollutants in coal-fired power plants,the advantages,disadvantages,and challenges of current air pollutant control devices(APCDs)and various unconventional pollutant control technologies were analyzed.Specifically,the current situation of controlling the emission of five typical unconventional pollutants from coal-fired power was discussed.Firstly,the current status of PM_(2.5)emission control during coal combustion was analyzed from the perspective of various agglomeration technologies.Secondly,the current status of heavy metal emission control was analyzed from three perspectives:before combustion,during combustion,and after combustion,and the advantages of heterogeneous agglomeration technology in treating heavy metal pollution from coal-fired power were elaborated.Thirdly,the current status of mercury emission control was analyzed from the perspectives of carbon based and non carbon based adsorbents,and the demonstration effect of magnetospheres mercury removal technology in controlling mercury emissions from coal combustion was emphasized.Fourthly,the current status of SO_(3)emission control was analyzed from the perspectives of alkaline adsorbents,chemical agglomeration,and non alkaline adsorbents,highlighting the innovation of high-temperature Sulfonation-based SO_(3)removal.Fifthly,the current status of VOCs emission control was analyzed from the perspectives of tail gas purification devices and activate

关 键 词：煤燃烧 非常规污染物 控制技术 协同脱除 

分 类 号：TK16[动力工程及工程热物理—热能工程]