污泥焚烧能量利用与污染物排放特性研究  

Energy Utilization and Pollutants Emission in Sewage Sludge Incineration

作　　者：袁言言 黄瑛[1] 张冬 董岳 杨凯[1] 肖军[1] 

机构地区：[1]东南大学能源与环境学院,能源转换及其过程测控教育部重点实验室,南京210000 [2]南京水务集团有限公司,南京210002

出　　处：《动力工程学报》2016年第11期934-940,共7页Journal of Chinese Society of Power Engineering

基　　金：国家973计划资助项目(2013CB228106);南京市科委青奥资助项目;南京市城建集团科研资助项目

摘　　要：利用Aspen Plus软件对污泥半干化焚烧和掺烧发电2种工艺过程进行模拟，探讨了不同工艺下4种污泥的能量利用情况及污染物排放特性．结果表明：半干化焚烧时，4种污泥的干基热值低于11．5 MJ／kg时均需补燃辅助燃料，且随着污泥热值的降低，补燃量显著增加；重金属含量高的污泥易造成大气污染，灰渣也难满足利用要求．污泥掺烧发电时，掺烧热值高的污泥对发电效率有利；对于同种污泥，随着污泥能量份额降低，发电效率提高，且污泥能量份额较低时，重金属含量高的污泥也能满足环保要求，适宜的污泥能量份额建议为5％～8％．当污泥热值低、重金属含量高时，建议采用掺烧发电工艺，反之采用半干化焚烧工艺．Numerical simulations were carried out on sewage sludge semi-drying incineration and blending combustion process of power generation using Aspen Plus software, during which the energy utilization and pollutants emission of 4 different sludge samples were studied. Results show that in the semi-drying incineration process, all the 4 sludge samples are required to supplement other fuels when their heating values of dry basis are lower than 11.5 MJ/kg, and as the heating value of sludge decreases, the supple- ments remarkably increase. The sludge samples with high content of heavy metals tend to cause air pollu- tion and their solid residuals can hardly be recycled. In the blending combustion process, the high heating value of sludge contributes to the generation efficiency; for the same sludge samples, the generation effi- ciency increases with the reduction of energy ratio of sludge; lower energy ratio of sludge helps to satisfy the requirement of environmental protection, even in the case of higher content of heavy metals in the sludge; the suitable energy ratio of sludge blended to coal is suggested to be 5%-8%. When the sludge is low in heating value and high in heavy metal content, the blending combustion process is recommended, otherwise, the semi-drying incineration process is suggested.

关 键 词：污泥 半干化焚烧 掺烧发电 能量利用 污染物排放 

分 类 号：X502[环境科学与工程—环境工程]