剩余污泥深度干燥的研究进展

RESEARCH PROGRESS ON RESIDUAL SLUDGE DEPTH DRYING

剩余污泥的含水率较高,对污泥进行干燥处理可以极大程度地减少污泥的水分。首先分析了污泥的含水特性和干燥污泥机理,然后分析了主要的污泥干燥方法研究现状,如热风干燥、过热蒸汽干燥、间接干燥、低温热流干燥、热泵干燥、太阳能干燥等。此外,探究了新型的污泥干燥技术及污泥干燥过程中可能产生的污染物,并在此基础上,对污泥干燥技术的发展方向进行了展望。

The moisture content of the residual sludge is generally high.The moisture of the residual sludge can be reduced obviously by drying process,so it is necessary to analyze and summarize the researches about sludge drying technologies.First of all,the moisture characteristics of sludge and the mechanism of drying sludge were analyzed.Then the mainstream sludge drying methods were analyzed,such as hot air drying,superheated steam drying,indirect drying,low temperature heat flow drying,heat pump drying,solar drying,etc.In addition,new sludge drying techniques and contaminants that may be produced during drying sludge were explored.In the end,we forecast the future development direction of residual sludge deepth drying technologies.