厌氧消化过程中污泥供热系统的设计探讨  

Discussion on Design of Thermal System of Sludge Anaerobic Digestion Process

作　　者：王丽 于磊 薛桂松 Wang Li;YuLei;Xue Guisong(CSD Water Service Co., Ltd., Beijing 100192, China)

机构地区：[1]中持水务股份有限公司,北京100192

出　　处：《广东化工》2018年第7期103-106,共4页Guangdong Chemical Industry

摘　　要：针对河北省某污泥处理工程采用的TSBP?分级分相厌氧消化技术中的污泥供热/换热系统进行设计探讨,结果表明:对于污泥的升温方式采用蒸汽直接加热及泥水-水泥换热形式,在满足工艺要求的同时也实现了污泥热量回收利用,实现了低能耗的供热形式;针对污泥大颗粒、高粘度及强腐蚀性的特点,易采用套管式换热器,具有传热效率高、设备简单、检修方便等优点;通过实验模拟测定,为避免换热器内管出现"溏心"现象,在工程设计中对于污泥流通的管道控制流速宜在0.9~1.2 m/s;换热系统的对数平均温差的最大值为6.5℃,因此为达到良好的换热效果,污泥流量设计为16~22 m^3/h,循环水量为10~12 m^3/h。Sludge-heat supply and exchange system of TSBP（Temperature staging/bacteria phased anaerobic digestion system） was designed and discussed in this paper, which was used in a sludge treatment project in Hebei province. The results showed that the heating mode was low-energy consumption, as a result of sludge was heated by steam directly and the heat was exchanged by a sludge-water exchanger and a water-sludge exchanger, which could meet the technological requirement, and achieve heat recovery and utilization. Large particle, high viscosity, and strong causticity, according to the characters of sludge, double-pipe heat exchangers were adequate for use, which had the advantages of high heat transfer rate, simple device, and convenient maintenance. Through experiment simulation, the suitable sludge velocity was （1.9-1.2 m/s to avoid the phenomenon of ＂watery center＂ in the heat exchangers＇ inside pipes. The maximal value of logarithmic mean temperature difference was 6.5 ℃, sludge flowrate was 16-22 m3/h, and recycle flowrate was 10-12 mS/h to reach good results.

关 键 词：厌氧消化 污泥换热 污泥供热 热量平衡 

分 类 号：X703[环境科学与工程—环境工程]