电解铝烟气余热低温干化处理市政污泥工程应用  

Application of Low Temperature Drying in Municipal Sludge Treatment with Waste Heat of Electrolytic Aluminum Flue Gas

作　　者：吕开雷 杨淘 陈紫君 杜永材 杨晓光 LüKai-lei;YANG Tao;CHEN Zi-jun;DU Yong-cai;YANG Xiao-guang(Nuclear Industry Southwest Survey&Design Institute Co.Ltd.,Chengdu 610052,China;Meishan Qimingxing Environmental Protection Technology Co.Ltd.,Meishan 620041,China)

机构地区：[1]核工业西南勘察设计研究院有限公司,四川成都610052 [2]眉山市启明星环保科技有限公司,四川眉山620041

出　　处：《中国给水排水》2021年第12期120-123,共4页China Water & Wastewater

摘　　要：我国目前污泥无害化处理处置短板突出,加快推进污泥无害化处置和资源化利用已成为共识。眉山市内污水处理厂污泥产量达150 t/d(含水率为80%),由于难以采用填埋处置,迫切需要寻找污泥处理处置新出路。利用该市企业电解铝车间产生的烟气余热低温干化处理市政污泥,将污泥含水率从80%降至30%以下,工程总规模为300 t/d。重点介绍了污泥干化系统、烟气余热换热系统、冷却系统、生物除臭系统、冷凝污水处理系统的工作原理、技术参数和设备配置。污泥经干化后运往周边工厂掺烧利用,实现了污泥的减量化、无害化、资源化利用,污泥处理直接运行成本51.62元/t,综合效益明显。At present,the drawbacks of sludge harmless treatment and disposal highlight in China,and it has become a consensus to promote the sludge harmless treatment and resource utilization.Meishan municipal wastewater treatment plant produces 150 t/d of sludge(water content is 80%),which is difficult to treat by landfill and is urgent to find a new way for treatment and disposal.The waste heat of flue gas from electrolytic aluminum workshop of the city’s enterprises is used to dry municipal sludge water content from 80%to less than 30%at low temperature with total project capability of 300 t/d.The working principle,technical parameters and equipment configuration of the sludge drying system,flue gas waste heat exchange system,cooling system,biological deodorization system and condensate sewage treatment system are mainly introduced.After drying,the sludge is transported to the surrounding factories for mixed burning,realizing the reduction,harmless and resource utilization of sludge.The direct operation cost of sludge treatment is 51.62 yuan/t,and the comprehensive benefit of the project is obvious.

关 键 词：电解铝 烟气余热 低温干化 市政污泥 

分 类 号：TU992[建筑科学—市政工程]