中国电机工程学报2016，Vol.36Issue(19)：5254-5262,9.DOI:10.13334/j.0258-8013.pcsee.150489
污泥水热反应产物特性与水热温度选择
Properties of Products From Sewage Sludge Hydrothermal Processes and Product Oriented Temperature Choice
摘要
Abstract
Hydrothermal process is applied to sewage sludge for its safe disposal and energy recovery. The influence of reaction temperature on the properties of products (char, liquid and gas) was investigated within the range of 170~270℃ with purpose to determine the proper temperature. Experimental results show that hydrothermal treatment effectively improve the dehydration and mobility of sewage sludge; and moisture content of the solid product (char) decreases below 60% after centrifugal separation. Carbon is tended to remain in the char; and the calorific value of the char met the requirements as low grade fuel, which proves that hydrothermal treatment is an effective way to turn sludge into solid fuel. As temperature rises, more solid matter decomposes, making the dry matter contents are negatively correlated with temperature; and its highest yield is only 12.94%. When temperature is higher than 230℃, the liquid from hydrothermal process is biodegradable. Heavy metals in the sludge are mainly accumulated in the char and become stable. As temperature increases, the combustible components in the gas product increase accordingly. The hydrothermal reactor has a serious problem of coking on the wall, while high temperature is beneficial to alleviate coking. Generally, the temperature of 260℃ corresponds to the acceptable products and light coking effect and can be recommended as operation temperature of hydrothermal process.关键词
水热处理/污泥/水热产物/反应温度/结焦Key words
hydrothermal treatment/sewage sludge/hydrothermal products/reaction temperature/coke分类
资源环境引用本文复制引用
薛香玉,陈德珍,戴晓虎,王征宇..污泥水热反应产物特性与水热温度选择[J].中国电机工程学报,2016,36(19):5254-5262,9.基金项目
国家863高技术基金计划项目(2012AA063504)；国家科技支撑计划课题(2013BAC16B03)。 The National High Technology Research and Development of China 863 Program (2012AA063504) （2012AA063504）
National Key Technology Support Program (2013BAC16B03) （2013BAC16B03）
