燃煤烟气超低排放全流程协同削减三氧化硫效果分析

doi:10.11930/j.issn.1004-9649.201704063

中国电力 ›› 2018, Vol. 51 ›› Issue (3): 177-184.DOI: 10.11930/j.issn.1004-9649.201704063

• 节能与环保 • 上一篇

燃煤烟气超低排放全流程协同削减三氧化硫效果分析

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

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

收稿日期:2017-04-23 修回日期:2017-05-09 出版日期:2018-03-05 发布日期:2018-03-12
作者简介:陶雷行(1962—),男,浙江嘉兴人,高级工程师,从事电力环保技术研究、咨询、监测与服务,E-mail: taolx@mhdlshanghaipower.com;翁杰(1989—),男,上海人,助理工程师,从事电力环保技术研究、专业管理,E-mail: wengj@shanghaipower.com;李晓峰(1966—),男,江苏常州人,工程师,从事火电厂热能动力技术研究、建设与运行管理,E-mail: lixf@sdcjpg.com;岳春妹(1985—),女,吉林乾安人,高级工程师,从事电力环保技术研究、评估咨询服务,E-mail: yuecm@mhdlshanghaipower.com。

Analysis on Coordinated Reduction of SO₃ in Whole Process of Ultra-low Emission in Coal-Fired Flue Gas

TAO Leixing¹, WENG Jie², LI Xiaofeng³, YUE Chunmei¹, WANG Jian¹, AI Chunmei¹, DONG Feiying³

1. Shanghai Minghua Electric Power Technology Engineering Co., Ltd., Shanghai 200090, China;
2. Shanghai Electric Power Co., Ltd., Shanghai 200010, China;
3. Shanghai Shangdian Caojing Power Generation Co., Ltd., Shanghai 201507, China

Received:2017-04-23 Revised:2017-05-09 Online:2018-03-05 Published:2018-03-12

摘要/Abstract

摘要： 烟气三氧化硫（SO₃）是形成雾霾的前驱体之一，研究火电厂烟气污染物控制流程中SO₃的形态、浓度、排放水平以及影响因素很有必要。对容量300~1000MW的燃煤机组超低排放设施进行实测，并对1 000 MW机组开展了全流程测试，同时与常规污染物控制流程进行比较，表明超低排放设施对SO₃具有更好的控制效果，SO₃综合脱除效率可达到90%。对烟气流程各设备脱除SO₃机理与减排效果进行分析，结果表明：（1）SCR脱硝装置具有将SO₂催化氧化成SO₃的作用。（2）空气预热器烟温降低过程间接消耗SO₃，低低温电除尘器、湿法脱硫吸收塔与湿式电除尘器对SO₃有削减作用，各设备对SO₃的削减份额分别占SO₃总量的30%、40%、15%、5%。（3）空气预热器、电除尘器运行温度对SO₃脱除率有较大影响。（4）高效脱硫协同除尘一体化吸收塔具有更好的脱除SO₃效果。

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

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.

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

中图分类号:

X511
TM621

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.

TAO Leixing, WENG Jie, LI Xiaofeng, YUE Chunmei, WANG Jian, AI Chunmei, DONG Feiying. Analysis on Coordinated Reduction of SO₃ in Whole Process of Ultra-low Emission in Coal-Fired Flue Gas[J]. Electric Power, 2018, 51(3): 177-184.

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https://www.electricpower.com.cn/CN/Y2018/V51/I3/177

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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

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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

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Analysis on Coordinated Reduction of SO₃ in Whole Process of Ultra-low Emission in Coal-Fired Flue Gas