富氧燃烧烟气压缩净化的研究进展

doi:10.16085/j.issn.1000-6613.2017-1114

摘要/Abstract

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CO₂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CO₂压缩过程中NO_x和SO₂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、SO₂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、SO₂、H₂O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、SO₂、HgO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HgO等多种污染物的联合脱除，才能实现富CO₂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。

关键词: 烟气, 净化, 富氧燃烧, 联合脱除

Abstract: 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 CO₂. Based on the purification technology of the oxy-fuel combustion flue gas,the removal of NO_x and SO₂ and their combined removal in CO₂ compression process are briefly described to explore the interaction between NO_x and SO₂ 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,SO₂ and H₂O 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,SO₂ and HgO. 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 CO₂ flue gas,the combined removal of pollutants such as NO_x, SO_x and HgO 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.

Key words: flue gas, purification, oxy-fuel combustion, combined removal

中图分类号:

X511

黄强, 张立麒, 周栋, 李小姗. 富氧燃烧烟气压缩净化的研究进展[J]. 化工进展, 2018, 37(03): 1152-1160.

HUANG Qiang, ZHANG Liqi, ZHOU Dong, LI Xiaoshan. Research and development on the purification of oxy-fuel combustion flue gas in the process of compression[J]. Chemical Industry and Engineering Progress, 2018, 37(03): 1152-1160.

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