石洞口污水处理厂污泥干化焚烧二期工程工艺要点解析

Analysis of Process Design of the Sludge Drying and Incineration Project Phase Ⅱ in Shidongkou WWTP

石洞口污水处理厂污泥处理二期工程采用"离心脱水+干化+单独焚烧"的工艺技术路线。污泥处理设施与污水工程位于同一厂区内,集约化污水、污泥厂区的布置方式体现了"泥水同步"的理念。污泥干化工艺设计中,综合设备运行的稳定性、安全性等多方面因素,确定干化污泥含水率为30%;二期工程在国内首次采用半干污泥地下接收坑的形式对外厂半干污泥进行接收、储存和混合。作为片区污泥处理的托底工程,为有效应对检修、应急故障等各种不利工况的发生,二期工程设置有2条污泥干化线及3条焚烧线,着力实现片区污泥全量、稳定、高效的处理处置。

In the sludge treatment phaseⅡproject of Shidongkou wastewater treatment plant,the technology of "centrifugal dehydration + drying + separate incineration " was adopted. The sludge treatment facilities and wastewater treatment projects were located in the same plant area. This intensive layout reflected the concept of "synchronous treatment of sludge and water ". In the drying process design,the water content of the dried sludge was determined to be 30% based on the stability,safety and other factors of equipment operation. For the first time in China,in the sludge drying and incineration project phaseⅡ,the semi-dried sludge underground receiving pit was adopted for the reception,storage and mixing of semi-dried sludge from other plants. As the basis supporting project for the region’s sludge treatment,two sludge drying lines and three incineration lines were set up in the project phaseⅡin order to effectively deal with the various adverse working conditions such as maintenance and emergency failure,and to achieve the whole,stable and efficient treatment and disposal of the region’s sludge.