基于生命周期法的电站锅炉静电除尘器环境影响评价

Environmental Impact Assessment of Power Plant Electrostatic Precipitator Based on Exergy Life Cycle Assessment

静电除尘器在我国电厂烟尘减排中广泛应用,运用生命周期法(exergy life cycle assessment,ELCA),以某电厂600 MW锅炉的静电除尘器为研究对象,对钢铁生产和运输及静电除尘器运行3个过程进行清单分析,计算不同过程能源消耗及环境影响。结果表明:每年烟气直接排入大气造成的环境影响潜值为2 575 894.44人当量,但静电除尘器可以将其环境影响潜值降低到4 052.95人当量。因此,静电除尘器可以有效改善环境影响。

Electrostatic precipitator is widely used in power plant Particulate emission reduc- tion in our country. Three Processes of Electrostatic precipitator project by exergy life cycle assessment （ELCA） methodology were analyzed, such as the production and transportation of the materials, dust removal, which based on an Electrostatic precipitator engineering pro- ject in a 600 MW power plant. The exergy consumption and environmental impact of each process were collected and calculated respectively. The results show that the environment im- pact load of Electrostatic precipitator project is 4 054.66 human equivalent value during one year, less than environment impact load 2 575 894.44 human equivalent value of flue-gas re- lease directly into the air without precipitator, so the Electrostatic precipitator engineering project can improve the quality of the environment.