化学团聚促进电除尘脱除烟气中PM2.5和SO3

doi:10.11949/j.issn.0438-1157.20160134

化工学报 ›› 2016, Vol. 67 ›› Issue (9): 3902-3909.DOI: 10.11949/j.issn.0438-1157.20160134

化学团聚促进电除尘脱除烟气中PM_2.5和SO₃

胡斌¹, 刘勇¹, 杨春敏², 侯大伟¹, 袁竹林¹, 杨林军¹

1 东南大学能源热转换及其过程测控教育部重点实验室, 江苏南京 210096;
2 中国矿业大学电力工程学院, 江苏徐州 221116

收稿日期:2016-01-29 修回日期:2016-03-24 出版日期:2016-09-05 发布日期:2016-09-05
通讯作者: 杨林军
基金资助:
国家重点基础研究发展计划项目（2013CB228505）。

Simultaneous control of PM_2.5 and SO₃ by chemical agglomeration collaborative electrostatic precipitation

HU Bin¹, LIU Yong¹, YANG Chunmin², HOU Dawei¹, YUAN Zhulin¹, YANG Linjun¹

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China;
2 School of Electric Power Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

Received:2016-01-29 Revised:2016-03-24 Online:2016-09-05 Published:2016-09-05
Supported by:
supported by the National Basic Research Program of China (2013CB228505).

摘要/Abstract

摘要：

化学团聚技术是实现燃煤烟气超净排放的有效技术之一，采用燃煤热态实验系统，分析探讨化学团聚技术促进电除尘对PM_2.5和SO₃的脱除作用，考察了化学团聚剂添加前后细颗粒化学组分及粒径的变化，以及化学团聚室、电除尘出口PM_2.5和SO₃浓度变化，并分析促进PM_2.5和SO₃脱除的机理。结果表明：喷入化学团聚剂后，细颗粒粒径峰值由0.1 μm增大到3 μm左右，细颗粒化学组分基本保持不变；电除尘出口细颗粒物数量浓度由5.8×104 cm^-3降低到3.2×104 cm^-3，电除尘效率提高45%；烟气SO₃浓度由40 mg·m^-3提高到100 mg·m^-3时，单一化学团聚对SO₃的脱除效率由42%提高到68%，协同电除尘SO₃脱除效率由66%提高到86%。

关键词: 化学团聚, PM_2.5, SO₃, 协同脱除

Abstract:

Chemical agglomeration is one of the effective technology to realize ultar-low emission for coal-fired power plants. The removal of PM_2.5 and SO₃ from coal combustion by chemical agglomeration was investigated experimentally based on the coal-fired thermal system. The chemical composition of fine particles, the changes of particle size and the concentration of PM_2.5 and SO₃ were investigated at the chemical reunion chamber and electric outlet. The mechanism of removing PM_2.5 and SO₃ was analyzed. The results showed that the chemical agglomeration evaporation can increase the average size of particles from 0.1 μm to 3 μm, while the particle compositions were mainly uncharged. The fine particle number concentration was reduced from 5.8×104 cm^-3 to 3.2×104 cm^-3 and the electric efficiency was increased by 45% at the electric outlet. When SO₃ concentration in flue gas increased from 40 mg·m^-3 to 100 mg·m^-3, the removal efficiency of SO₃ of a single chemical agglomeration increased from 42% to 68%, coordinated the electric SO₃ removal efficiency by 66% to 86%. The chemical agglomeration collaborative electrostatic precipitation can be efficient for the removal of PM_2.5 and SO₃.

Key words: chemical agglomeration, PM_2.5, SO₃, simultaneous control

中图分类号:

胡斌, 刘勇, 杨春敏, 侯大伟, 袁竹林, 杨林军. 化学团聚促进电除尘脱除烟气中PM_2.5和SO₃[J]. 化工学报, 2016, 67(9): 3902-3909.

HU Bin, LIU Yong, YANG Chunmin, HOU Dawei, YUAN Zhulin, YANG Linjun. Simultaneous control of PM_2.5 and SO₃ by chemical agglomeration collaborative electrostatic precipitation[J]. CIESC Journal, 2016, 67(9): 3902-3909.

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化学团聚促进电除尘脱除烟气中PM_2.5和SO₃

Simultaneous control of PM_2.5 and SO₃ by chemical agglomeration collaborative electrostatic precipitation

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