燃煤电厂电除尘PM_(10)和PM_(2.5)的排放控制Ⅱ:电除尘电源改造与PM_(10)和PM_(2.5)的排放(以660MW机组为例)

PM_(10) and PM_(2.5) Emission Control by Electrostatic Precipitator(ESP) for Coal-fired Power Plants Ⅱ: Evaluation of ESP Upgrading in Terms of PM_(10) and PM_(2.5) Emission Reduction with A 660 MW Generator

通过对比660 MW燃煤锅炉电除尘改造前后细颗粒物(PM2.5)和颗粒物(PM10)的排放,讨论电除尘改造的必要性及可行性。四电场电除尘器在常规单相电源供电下,PM10和PM2.5的排放浓度分别在63和23 mg/m3左右,总排放在75 mg/m3左右;采用三相高压电源时PM10和PM2.5的排放可控制在15和2.5 mg/m3以下,总排放在18 mg/m3左右,PM10和PM2.5的排放分别减排76%和89%以上。

This paper discusses PM10 and PM2.5emission reduction by upgrading four-filed electrostatic precipitators（ESPs） with a660 MW coal-fired power generator. By using a traditional single-phase high-voltage rectifier transformer（T/R）, the PM, PM10 and PM2.5emissions are around 75, 63 and 23 mg/m^3, respectively. After upgrading the T/R by using a three-phase T/R, the PM, PM10 and PM2.5emissions drop below about 18, 15 and 2.5 mg/m^3, respectively. Their reduction efficiencies are around 76%, 76% and 89%,respectively.