生活垃圾焚烧发电厂烟塔合一大气环境影响分析

Analysis of Atmospheric Environmental Impact for Municipal Solid Waste Incineration Plant Using Natural Draft Cooling Towers with Flue Gas Injection

摘要: 本文针对安徽某生活垃圾焚烧发电厂，模拟烟塔合一和烟囱排放两种不同排烟方式对大气环境的影响并进行比较，结果表明烟塔方案较烟囱方案的小时浓度、日均浓度较高，但年均浓度明显较低。同时，通过环境风洞实验确定了采用烟塔合一排烟方式时的环境防护距离，未超过“环发[2008]82号”要求“新改扩建项目环境防护距离不得小于300 m”，不会因采取烟塔合一方案而增加额外的拆迁需求。研究结果对生活垃圾焚烧发电厂排烟方式的优化选择具有一定参考价值。

Abstract: As the case study of a municipal solid waste (MSW) incineration plant in Anhui Province, the maxi- mum ground concentration from natural draft cooling towers (NDCT) with flue gas injection of 88 m high is calculated in this paper, as a parallel calculation, the maximum ground concentrations from a 60 m high chimney and an 80 m high chimney are calculated. The results show that, compared with the concentrations from the chimneys, the maximum yearly average ground concentration from a 88 m high cooling tower is lower, but the maximum daily and hour average ground concentrations are higher. Also, this paper determines the atmospheric environmental protection zone for NDCT with flue gas injection by physical simulation experiment in environmental wind tunnel. The determined zone is within the area required by MEP (Ministry of Environmental Protection of the People’s Republic of China), so there is no more demand for relocation causing by NDCT with flue gas injection. This research is valuable for the optimal selection of flue gas exhausting methods in municipal solid waste incineration plant.