密闭集气罩对污泥生物干化脱水效果的影响  

Influence of Gas Cover on Dewatering in Sewage Sludge Bio-drying

作　　者：王斌 蔡璐[2] 陈同斌[2] 刘洪涛[2] 高定[2] 沈玉君[2] 郑国砥[2] 

机构地区：[1]河南省漯河市水务投资有限公司,河南漯河462000 [2]中国科学院地理科学与资源研究所环境修复中心,北京100101

出　　处：《中国给水排水》2011年第13期106-108,共3页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2009AA064702);北京市科技计划项目(Z09040900930903)

摘　　要：CTB好氧生物干化工艺所配置的密闭集气罩在提高污染气体收集效率的同时,也会对污泥生物干化的脱水效率产生影响。研究结果表明,当鼓风量为4 680 m3/h、引风量为1 000m3/h时,加设密闭集气罩可提高生物干化的脱水效率;在此基础上增大鼓风量或减小引风量均会增加堆体上方空气湿度,不利于污泥的生物干化;从高温期第5天起,即使所设引风量较低,罩内壁也不产生冷凝水,因此蒸发的水分不会返回堆体而降低干化效率。Equipping hermetic gas cover in the control technology for bio-drying （CTB） can improve the collection efficiency of waste gas as well as affect the dewatering efficiency in sewage sludge biodrying. The experimental results show that when the blast volume is 4 680 m3/h and the induced draft volume is 1 000 m3/h, equipping hermetic gas cover can improve the dewatering efficiency in bio-drying. On that basis, either increasing blast volume or decreasing induced draft volume would increase the air humidity above the pile, weakening the bio-drying efficiency. From the 5th day of megathermal period, the condensate does not occur inside the cover wall even in a low induced draft volume, avoiding the decrease of bio-drying efficiency resulted from evaporated water returning to bulk.

关 键 词：污泥 生物干化 CTB工艺 集气罩 

分 类 号：X703[环境科学与工程—环境工程]