处理污泥焦颗粒内部孔结构在燃烧过程中变化  

INNER-PORE STRUCTURE CHANGE OF SEWAGE SLUDGE CHAR PARTICLE DURING COMBUSTION

作　　者：李培生[1] 胡益[1] 李洁[1] 向军[2] 孙路石[2] 胡松[2] 熊友辉[2] 孙学信[2] 

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《工程热物理学报》2007年第4期699-701,共3页Journal of Engineering Thermophysics

基　　金：中国博士后科学基金(No.20060400858)

摘　　要：在管式炉反应器中进行了1种污泥定温燃烧试验,进行了5个不同燃烬率样品的液氮静态容量法等温物理吸附试验。发现不同燃烬率的污泥样品孔分布特性相似,其孔系统可能主要是由一端封闭的不透气的孔构成;随着燃烬率的增加,比表面积、平均孔径和孔体积等参数变化不同;样品颗粒内孔表面分形维数随燃烬率的增长呈先降低再升高的趋势。The isothermal combustion of sewage sludge was performed in a fixed-tube reactor at 1123 K. Inner-Pore structure parameters of sewage sludge char particle with 5 different burn-out ratios were measured with N2 adsorption method. It was shown that inner-pore distributing of samples was similar. Pore structure in inner-pore system could be regarded as gasproof and one end closed. Parameters of BET Surface Area, Pore size and Pore Volume were changed in different trends with burn-out ratio increasing. Inner-pore Surface Fractal Dimension presented in the tendency of rising at the beginning and declining with burn-out ratio increasing.

关 键 词：污泥 燃烧 孔隙结构 分形理论 

分 类 号：TK16[动力工程及工程热物理—热能工程]