燃煤电厂湿式电除尘生命全周期环境影响评估研究

Research on Environmental Impact Assessment of Total Life Cycle for WESP in Coal-Fired Power Plants

摘要: 运用生命周期评价方法(life cycle assessment, LCA),以某电厂330 MW机组实施的湿式电除尘器(wet electrostatic precipitator, WESP)改造项目为研究对象，对原料生产、运输及WESP装置运行阶段进行生命周期清单分析，分别计算各阶段的能源消耗及对环境的影响进行评估，最后得到环境影响指数。结果表明：该电厂改造项目中WESP的全生命周期造成的环境负影响指数为4.55E+04 kg，远低于其运行后对大气污染物减排产生的环境正影响指数8.52E+05 kg，对环境有积极的改善作用。

Abstract: LCA method has been used to research on the environment impact assessment for WESP about some power plant of 330 MW in the course of renovation project including raw materials product, transportation and WESP operation steps. After all the energy consumption and environment im-pact in all steps have been assessed, environmental impact index can be given in the end. The result has shown that the load of environment impact about the renovation project of coal-fired power plant is 4.55E+04 kg, which is far below the load of environment impact after operation of 8.52E+04 kg, so it has the positive role in improving the environment.