集约化低温真空干化技术在嘉定某污水处理厂的应用

Application of Intensive Low-temperature Vacuum Dewatering and Drying Technology in a Sewage Treatment Plant in Jiading

低温真空脱水干化成套技术是一种新型污泥半干化技术。该技术将污泥的脱水、压滤与热干化等工序合成一体,在同一设备上连续完成。含水率为90%~99%的物料经一次工艺处理后,其含水率降至30%以下。嘉定某污水处理厂污泥处理采用低温真空脱水干化成套技术,设计规模为100 t/d(污泥含水率为80%),处理后污泥含水率<30%,可作建材利用或与生活垃圾掺烧。介绍了污泥低温真空脱水干化的原理、工艺流程、系统组成、设计及运行成本等。

Low-temperature vacuum dewatering and drying technology is a new type of sludge semi-drying technology.The technology integrates the steps of dewatering,pressure filtration and heat drying of sludge,and completes them continuously on the same equipment.The material moisture content of 90%-99%is reduced to less than 30%after one cycle.The low-temperature vacuum dewatering and drying technology was adopted in a sewage treatment plant in Jiading with the sludge treatment design capacity of 100 t/d when the sludge moisture content was 80%.After treatment,the sludge water content was less than 30%and could be used for building materials or incinerated together with domestic garbage.The principle,process flow,system composition,design and operation cost of sludge lowtemperature vacuum dewatering and drying was elaborated.