摘要
基于利用烟气余热的污泥低温干化技术,通过模拟试验和结合工程实践,首次分析研究了污泥对烟气中颗粒物的去除作用及其影响因素.结果表明,被试的四种污泥对烟气中PM2.5、PM10和TSP的去除率分别为18%~42%、32%~55%和39%~62%,污泥对烟气中PM2.5去除率的大小与污泥的细微结构和有机质含量相关联,烟气中颗粒物的去除率随污泥堆积密度和污泥含水率的增加而增加,随污泥粒度的增加而减少,污泥粒径变小时,污泥中水分更容易蒸发成微小水滴,有利于烟气中的细小颗粒物被吸附和凝结.
Using flue-gas waste-heat to dry sludge is an emerging green technology. The sludge drying process is found to be also effective in removal of particulates from the flue-gas. In this paper, we analyze the removal efficiency of such processes measured in both laboratory setting and real power plant environments to determine the important factors that controlling the removal efficiency. The result shows that, for four types of sludge, the removal rates of PM2.5, PM10, and TSP are in ranges of 18%~42%, 32%~55%, and 39%~62%, respectively. The removal rate of PM2.5 depends on the microstructure and organic matter content of the sludge. It increases with the sludge packing density and moisture content but decreases with the sludge particulate size. Smaller sludge particulate size is believed to be favoring the formation of abundant water drops in flue-gas which in turn adsorb and combine the micro particles into larger particles.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2016年第1期42-49,共8页
China Environmental Science
基金
国家科技支撑计划(2012BAC15B03)
浙江省重大科技攻关项目(2005C13051)
