中国电力2018，Vol.51Issue(3)：177-184,8.DOI:10.11930/j.issn.1004-9649.201704063
燃煤烟气超低排放全流程协同削减三氧化硫效果分析
Analysis on Coordinated Reduction of SO3 in Whole Process of Ultra-low Emission in Coal-Fired Flue Gas
陶雷行 1翁杰 2李晓峰 3岳春妹 1王剑 1艾春美 1董飞英3
作者信息
- 1. 上海明华电力技术工程有限公司,上海 200090
- 2. 上海电力股份有限公司,上海 200010
- 3. 上海上电漕泾发电有限公司,上海 201507
- 折叠
摘要
Abstract
It is necessary to study the formation,concentration,emission level and influencing factors of the sulfur trioxide in the control process of flue gas pollutants in thermal power plants because the sulfur trioxide in the flue gas is one of the precursors of smog.Based on the onsite measurements of ultra-low emission facilities of 300～1 000 MW coal-fired units and the whole process test of a 1 000 MW unit,the comparison with the conventional pollutant control process shows that the ultra-low emission facilities have a better control effect on SO3 with SO3 comprehensive removal efficiency reaching 90％.The SO3 removal mechanism and effect of each equipment in flue gas flow process were also analyzed.The results show that:(1) SCR denitrification device has a catalytic oxidation effect on SO2 converted to SO3.(2) The air preheater consumes SO3 indirectly during the process of the flue gas temperature drop.The low-low temperature electrostatic precipitator,the wet desulfurization absorber and the wet electrostatic precipitator all contribute to the SO3 reduction,accounting for 30％,40％,15％ and 5％ of total reduction respectively.(3) The air preheater,electrostatic precipitator operating temperature has great impacts on SO3 removal rate.(4) The high-efficiency desulfurization synergistic dust removing integrated absorption tower has a better effect of SO3 removal.关键词
燃煤电厂/烟气污染物/超低排放/SO3/SCR脱硝装置/空气预热器/低低温电除尘器/湿式脱硫/湿式电除尘器Key words
coal-fired units/flue gas pollutants/ultra-low emission/sulfur trioxide/SCR denitrification equipment/air preheater/low-low temperature electrostatic precipitator/wet desulfurization/wet electrostatic precipitator分类
资源环境引用本文复制引用
陶雷行,翁杰,李晓峰,岳春妹,王剑,艾春美,董飞英..燃煤烟气超低排放全流程协同削减三氧化硫效果分析[J].中国电力,2018,51(3):177-184,8.
