燃煤电厂烟气湿烟羽消除技术

doi:10.11930/j.issn.1004-9649.201812075

中国电力 ›› 2019, Vol. 52 ›› Issue (10): 162-170.DOI: 10.11930/j.issn.1004-9649.201812075

燃煤电厂烟气湿烟羽消除技术

王琳, 刘广建, 陈海平

华北电力大学能源动力与机械工程学院, 北京 102206

收稿日期:2018-12-21 修回日期:2019-07-01 出版日期:2019-10-05 发布日期:2019-10-12
作者简介:王琳(1996-),女,硕士研究生,从事热力系统建模优化研究,E-mail:wl2017@ncepu.edu.cn;刘广建(1977-),男,通信作者,博士,副教授,从事洁净煤技术,热力系统建模等研究,E-mail:liugj@ncepu.edu.cn
基金资助:
国家重点研发计划资助项目（燃煤机组水分回收与处理过程热质分布规律与能效评价，2018YFB0604301）。

Wet Plume Removal Technologies for Coal-Fired Power Plants

WANG Lin, LIU Guangjian, CHEN Haiping

School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China

Received:2018-12-21 Revised:2019-07-01 Online:2019-10-05 Published:2019-10-12
Supported by:
This work is supported by National Key R&D Program of China (Heat and Mass Distribution Law and Energy Efficiency Evaluation in Water Recovery and Treatment Process of Coal-fired Power Plants, No.2018YFB0604301).

摘要/Abstract

摘要： 燃煤电厂湿法脱硫后湿饱和烟气的直接排放一般会造成湿烟羽现象。对烟气加热法、烟气冷凝法、冷凝再热法和膜回收烟气水分法4种湿烟羽消除技术机理进行理论分析，利用湿烟羽预测模型定量计算了4种湿烟羽消除技术的参数选择。结果表明：烟气加热法，当环境温度低于5℃，相对湿度大于40%时，烟气需要加热至100℃以上；烟气冷凝法，当环境温度低于0℃，环境相对湿度大于40%时，需要将烟气冷凝低于15.5℃；烟气冷凝再热法的冷凝温度越低，再热温度就越低，当环境温度高于5℃，烟气冷凝至40℃，再热温度不高于80℃；膜回收法，当环境温度大于15℃、水回收率达到40%时，基本无白烟产生，而环境温度低于5℃时，水回收率要达到60%以上。

关键词: 湿烟羽, 烟气加热法, 烟气冷凝法, 烟气冷凝再热法, 膜回收法

Abstract: The direct discharge of wet saturated flue gas after wet flue gas desulfurization in coal-fired power plants usually causes wet plume. In this paper, four wet plume elimination techniques, i.e., flue gas heating, flue gas condensation, flue gas condensation and reheating and membrane recovery of flue gas moisture, are analyzed theoretically, and the parameters in each technique are determined through quantitative calculation using the wet plume predication model. The results show:For reheating technology, if the ambient temperature is lower than 5℃ and the relative humidity is greater than 40%, the flue gas should be heated to above 100℃; For condensation technology, if the ambient temperature is under 0℃ and the relative humidity of the environment is greater than 40%, flue gas temperature should be cooled down to below 15.5℃; For condensation and reheating technology, the lower the condensation temperature, the lower reheating temperature should be. If the ambient temperature is higher than 5℃ and flue gas condensation temperature is cooled down to below 40℃, the reheating temperature basically should not be higher than 80℃; For membrane recovery technology, with the ambient temperature greater than 15℃ and the water recovery rate higher than 40%, basically there will be negligible wet plume generated; If ambient temperature is lower than 5℃, the water recovery rate should be kept higher than 60%.

Key words: wet plume, flue gas reheating technology, flue gas condensation technology, flue gas condensation and reheating, membrane recovery technology

中图分类号:

TK09

王琳, 刘广建, 陈海平. 燃煤电厂烟气湿烟羽消除技术[J]. 中国电力, 2019, 52(10): 162-170.

WANG Lin, LIU Guangjian, CHEN Haiping. Wet Plume Removal Technologies for Coal-Fired Power Plants[J]. Electric Power, 2019, 52(10): 162-170.

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https://www.electricpower.com.cn/CN/Y2019/V52/I10/162

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