城市垃圾焚烧厂直接掺烧城市污泥处置技术及其污染控制

Disposal technology and pollution control of directly mixed incineration of municipal sludge in municipal solid waste incineration plant

为研究有效处置城市污泥的方法,通过改变掺烧配比、监测燃烧烟气等对燃烧过程的探索,研究了城市污泥直接与城市生活垃圾焚烧厂中的垃圾进行掺烧混烧的处置技术。结果表明:直接掺烧12.5%左右的城市污泥混烧,对生活垃圾入炉量、焚烧炉稳定以及污染物的排放量均未产生较大影响;根据掺烧城市污泥的烟气监测结果,直接掺烧城市污泥后,排放的污染物浓度虽略有升高,但都满足排放要求;掺烧前后产生的固体废物产生量基本没有太大变化,也未对周围环境造成影响。生活垃圾焚烧厂按照一定比例直接掺烧城市污泥(含水率80.0%)在技术上可行,可为城市污泥处置提供新思路。

In order to study the effective disposal method of municipal sludge, and avoid the secondary pollution of organic matter, nitrogen, phosphorus, heavy metal, bacteria and pathogenic bacteria in the sludge to the environment, the disposal technology of mixed incineration of municipal sludge and rubbish in municipal solid waste incineration plant was explored. The results show that the direct combustion of 12.5% municipal sludge had no significant impact on the amount of municipal solid waste into the incinerator, the stability of the incinerator and the emission of pollutants. According to the flue gas monitoring results of mixed incineration of municipal sludge, although the discharged pollutant concentrations slightly increased after directly mixed incineration of municipal sludge, they all could meet the emission requirements. The amount of produced solid waste before and after mixed incineration showed slightly change, and did not result in effect on the surrounding environment. It is technically feasible for directly mixed incineration of a certain proportion of municipal sludge(moisture content 80.0%) in a municipal solid waste incineration plant, which can provide new ideas for municipal sludge disposal.