燃煤电厂烟气一次PM_(2.5)控制技术的综合评估

Comprehensive assessment of primary PM_(2.5) control technologies for coal-fired power plants

以燃煤电厂烟气颗粒物控制技术或组合为研究对象,在文献调研和专家问卷调查基础上,针对燃煤电厂一次PM2.5排放特征,构建了包含环境、经济和技术三方面共16项四个层次的评价指标体系;采用模糊综合法对7种颗粒物控制技术及其组合开展了综合评估.结果表明:在综合分析或着重环境性能的情况下,7种单一或组合控制技术的优先顺序为:低低温静电除尘配高频电源+湿式静电除尘≈静电除尘配高频电源+湿式静电除尘>电袋复合除尘>静电除尘+湿式静电除尘>袋式除尘>静电除尘>电凝并+静电除尘.若优先考虑经济因素,静电除尘为最优选择;优先考虑技术性能则袋式除尘为最优选择.

The object of this study is the evaluation of coal-fired power plant flue gas particulate control technologies ortheir combinations. According to the literature and the expert questionnaire surveys, an assessment model with sixteenevaluation indexes regarding environment, economy and technology was constructed to investigate the primary PM2.5emission behaviors from coal-fired power plants. Analytic Hierarchy Process （AHP） was used to conducted an assessmentfor seven coal-fired power plant flue gas particulate control technologies or their combinations. The results showed thatthe order of priority based on a comprehensive analysis or considering environment is： low-temperature electrostaticprecipitation with high-frequency power ＋ wet electrostatic precipitation ≈ electrostatic precipitation with high frequencypower ＋ wet electrostatic precipitation 〉 electrostatic-bag precipitation 〉 electrostatic precipitation ＋ wet electrostaticprecipitation 〉 bag precipitation 〉 electrostatic precipitation 〉 electrostatic coagulation precipitation. The Electrostaticprecipitation could be the best option if considering economics. Otherwise, the bag precipitation was the best ifconsidering technology.