燃煤电厂湿式电除尘器减排及能效特性研究

doi:10.11930/j.issn.1004-9649.202105135

摘要/Abstract

摘要： 在工况及负荷稳定的情况下，对122台燃煤电厂配套湿式电除尘器（金属板式35台、导电玻璃钢87台）开展多污染物的减排特性和能耗测试分析，结果表明，湿式电除尘器对各类污染物均具有较高的脱除效率，绝大部分湿式电除尘器出口颗粒物、PM_2.5、雾滴和SO₃可分别控制在5、2.5、25和10 mg/m³以下，出口PM_2.5/PM占比明显升高，导电玻璃湿式电除尘器一般为非连续喷淋，电源参数可以升到更高，因此对SO₃脱除率也较金属板式更高，出口雾滴浓度更低；金属板式和导电玻璃钢湿式电除尘器比电耗分别为0.68×10^–4~3.34×10^–4、0.74×10^–4~3.38×10^–4 kW·h/m³，平均值分别为1.55×10^–4、1.75×10^–4 kW·h/m³，颗粒物脱除能耗分别在4.7~24.7、2.9~37.5 kW·h/kg，平均值分别为10.8、13.3 kW·h/kg，且入口颗粒物浓度越高颗粒物脱除能耗越低。

关键词: 燃煤电厂, 超低排放, 湿式电除尘器, 污染物排放, 能效

Abstract: The emission reduction characteristics and energy consumption of multiple pollutants were tested and analyzed on 122 sets of supporting Wet Electrostatic Precipitator (35 sets of metal plate type and 87 sets of conductive FRP type) of coal-fired power plants, under stable working conditions and load. The results show that the WESP has high removal efficiency for all kinds of pollutants, the particulate matter, PM_2.5, droplets and SO₃ at the exit of most WESP can be controlled below 5, 2.5, 25 and 10 mg/m³ respectively, and the ratio of PM_2.5/PM at the exit was increased significantly. Generally, the power supply parameters of conductive FRP type WESP could be raised to a higher level because of discontinuous spraying, so the SO₃ removal rate was higher than that of the metal plate WESP. Droplet concentration at the exit was lower. The specific power consumption of metal plate type and conductive FRP WESP were 0.68×10^-4~3.34×10^-4 and 0.74×10^-4~3.38×10^-4 kW·h/m³, respectively, and the average values were 1.55×10^-4 and 1.75×10^-4 kW·h/m³, respectively. The energy consumption for particle removal were 4.7~24.7 and 2.9~37.5 kW·h/kg, respectively, and the average values were 10.8 and 13.3 kW·h/kg, respectively. The higher the concentration of inlet particles, the lower the energy consumption for particle removal.This study can provide reference for the following energy saving and carbon reduction operation of ultra-low emission units.

Key words: coal fired power plants, ultra-low emission, wet electrostatic precipitator, pollutant emission, energy efficiency

刘含笑, 吴黎明, 赵琳, 于立元, 郦建国, 崔盈. 燃煤电厂湿式电除尘器减排及能效特性研究[J]. 中国电力, 2022, 55(5): 196-203.

LIU Hanxiao, WU Liming, ZHAO Lin, YU Liyuan, LI Jianguo, CUI Ying. Study on Emission Reduction and Energy Efficiency Characteristics of Wet Electrostatic Precipitator for Coal Fired Power Plants[J]. Electric Power, 2022, 55(5): 196-203.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202105135

https://www.electricpower.com.cn/CN/Y2022/V55/I5/196

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