中国市政污泥干化焚烧技术研究进展OA

Municipal sludge is a by-product of sewage treatment,and its safe disposal is an important issue in the field of environmental protection.Sludge drying and incineration technology can simultaneously realize sludge reduc-tion,stabilization,harmlessness and resource utilization through the process route of drying first and then incinera-tion.In this paper,the technical characteristics of drying and incineration are systematically analyzed.The drying process includes direct drying,indirect drying and indirect-direct combined drying.Emerging technologies such as thermal hydrolysis,microwave drying and hydrothermal carbonization further improve the dewatering efficiency.Incineration disposal is divided into two categories:independent incineration and co-incineration.The harmless treat-ment of independent incineration is more thorough.Co-incineration can reduce operating costs by relying on existing facilities such as cement kilns and thermal power plants.After being identified as harmless,the incineration ash can be used as raw material in the fields of brick making,roadbed materials and so on.In the future,the technology should focus on the development direction of precision,low-carbon and synergy,and continuously improve the technical eco-nomy and resource value through process optimization and cross-industry coupling,so as to provide important support for urban environmental governance and the construction of'waste-free cities'.