燃煤电厂CPM排放状况及其环境效应研究  

Researches on CPM status emitted by coal-fired power plants and its environmental effects

作　　者：王春艳 申进朝 周伟峰 刘红艳 刘桓嘉 WANG Chunyan;SHEN Jinchao;ZHOU Weifeng;LIU Hongyan;LIU Huanjia(Department of Chemical and Environmental Engineering,Anyang Institute of Technology,Anyang 455000,China;He′nan Ecological and Environmental Monitoring Center,Zhengzhou 450046,China;Zhengzhou ecological environment monitoring center of He′nan Province,Zhengzhou 450007,China;Anyang ecological environment monitoring center of He′nan Province,Anyang 455000,China;College of Environment,He′nan Normal University,Xinxiang 453002,China)

机构地区：[1]安阳工学院化学与环境工程学院,河南安阳455000 [2]河南省生态环境监测中心,河南郑州450046 [3]河南省郑州生态环境监测中心,河南郑州450007 [4]河南省安阳生态环境监测中心,河南安阳455000 [5]河南师范大学环境学院,河南新乡453002

出　　处：《轻工学报》2022年第6期101-109,共9页Journal of Light Industry

基　　金：国家自然科学基金项目(42007204)。

摘　　要：参考2017年EPA推荐的《固定污染源废气可凝结颗粒物的测定干冲击瓶法》(Method 202)和我国《固定污染源废气低浓度颗粒物的测定重量法》(HJ 836-2017),设计并应用同步采集可过滤颗粒物(Filterable Particulate Matter,FPM)和可凝结颗粒物(Condensable Particulate Matter,CPM)的装置,测定了国内华北地区3家燃煤电厂A、B、C排放的FPM、CPM及其中水溶性离子和金属元素质量浓度,并应用计算流体力学法模拟一定气象条件时固定源排放CPM形成PM_(2.5)的扩散轨迹。结果表明:燃煤电厂A、B、C排放的总颗粒物(Total Particulate Matter,TPM)水平均较低,质量浓度分别为(8.63±3.11)mg/m^(3)、(19.05±8.85)mg/m^(3)、(5.07±1.59)mg/m^(3),其中CPM占比约90%;CPM中以CPM_(无机)为主,SO^(2)_(-4)、NH^(+)_(4)、Na^(+)等水溶性离子是其中重要组分,金属尤其是重金属的排放不容忽视;在不利于污染物扩散的气象条件下,CPM累积在大气边界层下面的固定源周边大气中,引起了PM_(2.5)短时间内累积升高,是重污染天气形成的重要因素。According to Method 202 proposed by EPA in 2017 and HJ 836-2017 issued by Environmental Protection Department of China,devices of TPM was designed and utilized with which samples of FPM and CPM could be collected simultaneously.FPM,CPM,water soluble ions and elements analysis of CPM in flue gas emitted by three coal-fired power plants named A,B and C were monitored.CFD was used to simulate the diffusion trajectory of PM_(2.5) formed by CPM emission from fixed sources in stationary weather.The statistical results showed that mass concentrations of TPM emitted by plant A,B and C was 8.63±3.11 mg/m^(3),19.05±8.85 mg/m^(3)and 5.07±1.59 mg/m^(3),respectively.It was proved that CPM was 90%of TPM and FPM was low mass concentration.Inorganic CPM was dominant in CPM,SO_(4)^(2-),NH_(4)^(+),Na^(+) and other water-soluble ions were important components,and the emission of metal elements especially heavy metal should not be neglected.CFD was used to simulate the diffusion trajectory of PM_(2.5) formed by CPM emission from fixed sources in stationary weather.It was proved that CPM could accumulate below atmospheric boundary layer under meteorological conditions that were not conductive to the diffusion of pollutants,causing PM_(2.5) accumulation in a short period of time,which was an important factor in the formation of heavy pollutant weather.

关 键 词：可过滤颗粒物 可凝结颗粒物 超低排放 燃煤电厂 环境效应 

分 类 号：X513[环境科学与工程—环境工程]