生活垃圾焚烧发电协同处置市政污泥技术研究——以衡阳市为例

Municipal Sewage Sludge Co-firing in Waste Incineration Power Plant: A Case Study of Hengyang City

基于不影响生活垃圾焚烧炉污染物排放达标和焚烧炉正常运行的前提下,对生活垃圾焚烧协同处置污泥进行了系统设计研究和相关实验检测。研究结果表明,进厂污泥含水率可控制在65%以下,污泥造粒转盘热干化技术为首选干燥方法,干燥热源采用0.6 MPa、250℃汽轮机二段抽汽,干燥出料污泥含水率40%时,入炉混烧比例可以不必约束;生活垃圾焚烧发电协同处置市政污泥,其臭味气体、烟气、渗沥液、灰渣等处理设施实现共享并能保证污染物达标排放,可提高污泥无害化、减量化、资源化处置水平。

Without impacting on meeting the discharge standard of pollutants from municipal solid waste incinerator and the normal operation of the incinerator,the system design research and related experimental testing were carried out on the municipal solid waste incineration co-processing municipal sewage sludge. The results showed that the moisture content of sludge which had entered into the plant could be controlled below 65%,and heat drying technology of sludge granulation was the best drying method,and the heat source in sludge drying adopted second stage extraction steam of 0.6 MPa,250 ℃,and it was unnecessary to limit the mixed burning ratio of sludge and municipal solid waste when moisture content of sludge was 40%. The sharing of treatment facilities which dealed with odor gas,flue gas,leachate and ash etc. Coming from the process when municipal solid waste incinerated power plants co-processing municipal sewage sludge could ensure that pollutant discharges under certain standard. It could also improve the harmlessness,reduction,and recycling level of sludge.