超低排放电厂脱硫及湿式电除尘废水中汞排放分析

doi:10.11930/j.issn.1004-9649.201610054

中国电力 ›› 2017, Vol. 50 ›› Issue (11): 164-167.DOI: 10.11930/j.issn.1004-9649.201610054

超低排放电厂脱硫及湿式电除尘废水中汞排放分析

宋畅¹, 张翼², 郝剑², 彰金宝², 王家伟¹, 安连锁¹, 张永生¹

1. 华北电力大学能源动力与机械工程学院,北京 102206;
2. 三河发电有限责任公司,河北廊坊 065200

收稿日期:2016-10-09 出版日期:2017-11-25 发布日期:2017-11-29
作者简介:宋畅（1965—）,男,四川合江人,高级工程师,从事电力生产技术管理和燃煤电站污染物控制技术应用研究。E-mail: 16040479@shenhua.cc
基金资助:
国家科技支撑计划资助项目(2015BAA05B02)

Analysis on Mercury Emission From WFGD and WESP Wastewater in Ultra-Low Air Pollutant Emission Coal-Fired Power Plants

SONG Chang¹, ZHANG Yi², HAO Jian², ZHANG Jinbao², WANG Jiawei¹, AN Liansuo¹, ZHANG Yongsheng¹

1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;
2. Sanhe Power Generation Co., Ltd., Langfang 065200, China

Received:2016-10-09 Online:2017-11-25 Published:2017-11-29
Supported by:
This work is supported by Key Projects in the National Science & Technology of China(No.2015BAA05B02).

摘要/Abstract

摘要： 为达到烟气超低排放目的,神华国华三河发电有限责任公司300 MW亚临界自然循环燃煤机组实施了一系列改造项目,如低氮燃烧器改造,SCR脱硝改造,新增低低温省煤器,静电除尘器高频电源改造,湿法脱硫塔脱硫提效并增加管式除雾器,新增湿式静电除尘器等。为研究超低排放改造后脱硫废水及湿式静电除尘器废水中汞浓度变化,以该机组为研究对象,取样分析了脱硫塔、湿式电除尘器补充水及排放废水中汞含量。研究结果表明：由于燃煤、石灰石及补充水中汞含量较低,实验期间该超低排放改造电厂脱硫废水及湿式电除尘器废水中汞含量均较低,分别为0.140~0.468 μg/L和0.094~0.102 μg/L;脱硫塔所排52 m³/h废水中汞增加量为1.75~5.50 mg;湿式电除尘器所排废水中汞含量没有明显变化。

关键词: 燃煤电厂, 超低排放, 湿式电除尘废水, 脱硫废水, 汞排放

Abstract: In order to achieve the goal of ultra-low flue gas emission, a series of retrofit projects have been carried out on the 300 MW subcritical natural circulation coal-fired unit of Sanhe Power Generation Co., Ltd., such as low NO_x burner modification, SCR denitration modification, low-low temperature economizer installation, high frequency power source modification for the electrostatic precipitator (ESP), efficiency improvement and tubular demister installation for the WFGD absorber, as well as the installation of wet ESP (WESP). Taking the unit as the study object to explore the changes of the mercury concentrations in the WFGD and WESP wastewater after the retrofits, the makeup water and discharge water of both the FGD absorber and WESP are sampled to analyze the mercury contents. The results show that due to the low mercury content in coal, limestone and the makeup water, the mercury concentration in WFGD and WESP wastewater is also very low which ranges between 0.140 and 0.468 μg/L and between 0.094 and 0.102 μg/L respectively. The mercury contents in the 52 m³/h WFGD discharge water increase by 1.75 to 5.50 mg while no significant changes of the mercury concentration is observed in the WESP discharge water.

Key words: coal-fired power plant, ultra-low emission, WESP wastewater, WFGD wastewater, mercury emission

中图分类号:

X705

宋畅, 张翼, 郝剑, 彰金宝, 王家伟, 安连锁, 张永生. 超低排放电厂脱硫及湿式电除尘废水中汞排放分析[J]. 中国电力, 2017, 50(11): 164-167.

SONG Chang, ZHANG Yi, HAO Jian, ZHANG Jinbao, WANG Jiawei, AN Liansuo, ZHANG Yongsheng. Analysis on Mercury Emission From WFGD and WESP Wastewater in Ultra-Low Air Pollutant Emission Coal-Fired Power Plants[J]. Electric Power, 2017, 50(11): 164-167.

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超低排放电厂脱硫及湿式电除尘废水中汞排放分析

Analysis on Mercury Emission From WFGD and WESP Wastewater in Ultra-Low Air Pollutant Emission Coal-Fired Power Plants

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