湿法脱硫系统PM2.5排放特性分析

doi:10.11930/j.issn.1004-9649.202003232

中国电力 ›› 2021, Vol. 54 ›› Issue (6): 153-158.DOI: 10.11930/j.issn.1004-9649.202003232

湿法脱硫系统PM_2.5排放特性分析

杜振¹, 王志东², 江建平¹, 朱跃¹

1. 华电电力科学研究院有限公司，浙江杭州 310030;
2. 华电新乡发电有限公司，河南新乡 453635

收稿日期:2020-03-30 修回日期:2020-10-12 发布日期:2021-06-05
作者简介:杜振(1985-),男,通信作者,硕士,高级工程师,从事火电厂大气污染综合治理、细颗粒物污染物控制技术研究,E-mail:adozn@163.com;王志东(1974-),男,工程师,从事火电厂除尘、脱硫、脱硝、水处理等技术工作,E-mail:wzd_7409@163.com
基金资助:
国家重点研发计划资助项目(典型除尘器颗粒物脱除响应关系数据库构建及高效除尘技术装备与系统的性能评估研究，2017YFB 0603201-03)

Analysis on PM_2.5 Emission Characteristics of Wet Desulfurization System

DU Zhen¹, WANG Zhidong², JIANG Jianping¹, ZHU Yue¹

1. Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, China;
2. Huadian Xinxiang Power Generation Co., Ltd., Xinxiang 453635, China

Received:2020-03-30 Revised:2020-10-12 Published:2021-06-05
Supported by:
This work is supported by the National Key Research and Development Program of China (Research on the Construction of Response Database of Typical Precipitator Particle Removal and Performance Evaluation of High Efficiency Dust Removal Equipment and System, No.2017YFB0603201-03)

摘要/Abstract

摘要： 为系统分析湿法脱硫系统出口PM_2.5的排放特性，基于26台湿法脱硫系统出口颗粒物和PM_2.5的排放情况的现场测试，研究入口颗粒物浓度、烟气流速、液气比、pH值以及雾滴浓度对PM_2.5排放特性的影响。烟气经过湿法脱硫系统处理后，出口PM_2.5占颗粒物的比重随着烟气中颗粒物浓度的降低而显著增大，PM_2.5排放系数随着吸收塔烟气流速、液气比、pH值或雾滴浓度的增大而增大，PM_2.5排放系数的增大速率大于烟气流速、液气比和pH值的增大速率，与雾滴浓度的增大速率基本一致。因此雾滴浓度对PM_2.5排放系数具有直接影响，湿法脱硫系统中控制雾滴浓度是降低出口PM_2.5排放的关键。

关键词: 颗粒物, PM_2.5, 湿法脱硫系统, 排放系数, 烟气流速

Abstract: In order to systematically analyze the emission characteristics of PM_2.5 at the outlet of wet desulfurization system(WFGD), based on the on-site test of the particulate matter(PM) and PM_2.5 at the exit of WFGD in 26 ultra-low emission units, the effects of inlet PM concentration, flue gas flow rate, liquid gas ratio, pH value and droplet concentration on the PM_2.5 emission at the outlet of WFGD are investigated. The measurement results indicate that the proportion of PM_2.5 to PM surges with the decrease of mass concentration for PM. PM_2.5 emission coefficient increases with the increase of flue gas flow rate, liquid gas ratio, pH value or droplet concentration for absorption tower. The increase rate of PM_2.5 emission coefficient is higher than the increase rate of flue gas flow rate, liquid gas ratio and pH value, but it is basically consistent with the increase rate of droplet concentration. Which shows that droplet concentration has a direct impact on PM_2.5 emission coefficient, ant the key to reduce PM_2.5 emission factor is to control droplet concentration in WFGD.

Key words: PM, PM_2.5, wet desulfurization system(WFGD), emission coefficient, flue gas flow rate

杜振, 王志东, 江建平, 朱跃. 湿法脱硫系统PM_2.5排放特性分析[J]. 中国电力, 2021, 54(6): 153-158.

DU Zhen, WANG Zhidong, JIANG Jianping, ZHU Yue. Analysis on PM_2.5 Emission Characteristics of Wet Desulfurization System[J]. Electric Power, 2021, 54(6): 153-158.

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湿法脱硫系统PM_2.5排放特性分析

Analysis on PM_2.5 Emission Characteristics of Wet Desulfurization System

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湿法脱硫系统PM2.5排放特性分析

Analysis on PM2.5 Emission Characteristics of Wet Desulfurization System

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湿法脱硫系统PM_2.5排放特性分析

Analysis on PM_2.5 Emission Characteristics of Wet Desulfurization System