煤助滤强化城市污泥脱水后的热值资源化利用

研究了以颗粒煤为助滤剂,采用"真空一加压"二段式过滤强化城市污泥脱水的工艺效果.利用热值分析、工业分析和TG-DTA测试手段考察了泥煤混合物料热值资源化利用的前景.实验表明:按m(泥):m(煤)分别为1∶2和1∶3,向含水率为96.41%的消化污泥中添加粒度为0.15～0.18 mm颗粒煤,经0.02 MPa真空过滤3...

CALORIFIC VALUE RESOURCE UTILIZATION OF DEWATERED SEWAGE SLUDGE ENHANCED BY COAL

In this work,technological effect of two stages(vacuum filtering and pressure filtering) sewage sludge dewatering enhanced via adding particle coal has been studied.In addition,the calorific value utilization of sludge-coal mixed materials has been prospected based on analysis of calorific value,industrial components and TG-DTA.It’s shown that if adding coal granularity at 0.15 ～ 0.18 mm with ratio(dry sludge ∶ coal) 1∶ 2 and 1∶ 3 to digest sludge,the water content could decrease to 43.57% and 39.36% respectively from the original 96.41% after 30min vacuum filtering at 0.02 MPa and 30min pressure filtering at 0.3 MPa sequentially.The obtained wet basis materials have 9 409 kJ /kg and 10 252 kJ /kg low calorific value respectively,and both dry bases have similar industrial components with coal.Sludge-coal mixed materials have pyrolysis or combustion characteristics of sludge and coal,which extended reaction temperature range.