富氧燃烧烟气压缩净化的研究进展  

Research and development on the purification of oxy-fuel combustion flue gas in the process of compression

作　　者：黄强[1] 张立麒[2] 周栋 李小姗[2] 

机构地区：[1]九江学院机械与材料工程学院,江西九江332005 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《化工进展》2018年第3期1152-1160,共9页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51566004);江西省高等学校科技落地计划(KJLD14093);江西省普通本科高校中青年教师发展计划访问学者专项(赣教2016-109)项目

摘　　要：富氧燃烧技术具有大幅度降低单位燃料的NO_x和SO_x排放的优点,但酸性物质及汞等污染物的存在对CO_2的后续资源化利用和埋存造成极大影响。本文从富氧燃烧烟气净化技术角度出发,简述了CO_2压缩过程中NO_x和SO_2单独脱除、联合脱除的研究情况,以探寻协同脱除过程中NO_x、SO_2相互影响的规律以及具体N-S反应的路径;分析了压缩过程协同脱汞的研究进展,探讨压缩过程汞脱除的具体机制,观察NO_x、SO_2、H_2O的含量对汞脱除的影响;最后介绍了富氧燃烧烟气压缩净化技术的中试应用情况。分析表明,现有研究大多注重于孤立地分析各种工况参数对NO_x、SO_2、Hg O吸收脱除的影响,因此难以从反应机理上揭示多种污染物脱除之间的内在联系与相互作用机制,只有实现NO_x、SO_x及Hg O等多种污染物的联合脱除,才能实现富CO_2烟气的有效净化,从而大大减少富氧燃烧技术的设备投资和运行成本,有效促进该技术的大规模商业化应用。Oxy-fuel combustion technology can reduce the NO_x and SO_x emissions per unit fuel.However,the presence of pollutants such as acid and mercury has a great impact on the subsequent utilization and storage of CO_2.Based on the purification technology of the oxy-fuel combustion flue gas,the removal of NO_x and SO_2 and their combined removal in CO_2 compression process are briefly described to explore the interaction between NO_x and SO_2 in the combined removal process and the path of N-S reaction.The research progress of combined mercury removal in compression process is analyzed to discuss the specific mechanism and the effects of NO_x,SO_2 and H_2O on the removal of mercury.Finally,pilot scale application of compression purification technology is introduced.The analysis shows that most of the existing researches focus on the individual analysis of the effects of various operating conditions on the removal of NO_x,SO_2 and Hg O.Therefore,it is difficult to reveal the internal relationship and interaction mechanism among the removal of pollutants.In order to realize the effective purification of the rich CO_2 flue gas,the combined removal of pollutants such as NO_x,SO_x and Hg O should be realized. Thus,the equipment investment and operation cost of oxy-fuel combustion technology can be greatly reduced,and the large-scale commercial application of the technology can be promoted effectively.

关 键 词：烟气 净化 富氧燃烧 联合脱除 

分 类 号：X511[环境科学与工程—环境工程]