基于正交试验设计的污泥低温热解条件优化  

Optimization on low-temperature pyrolysis conditions of sewage sludge established based on orthogonal experimental design

作　　者：宁方勇[1] 胡艳军[1] 钟英杰[1] 

机构地区：[1]浙江工业大学能源与动力工程研究所,浙江杭州310032

出　　处：《浙江工业大学学报》2013年第4期390-394,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(51008279);浙江省自然科学基金资助项目(Y5100258)

摘　　要：以杭州城市污水处理厂脱水污泥为原料,基于正交试验设计的理论基础,开展了污泥低温热解制取固、液、气三相燃料产物的反应条件优化研究.以三相产物的产率和热值为评价指标,确定了影响低温热解性能的因素主次关系依次为:热解终温、反应时间、升温速率;并获得了制取三相产物的最佳热解工况条件.影响污泥热解效率的因素多而复杂,正交试验设计方法可以简便、可靠地阐明各因素对污泥热解制取三相产物的影响程度并确定最佳组合,为该技术工艺的工业化实施提供可靠的运行参数.Low-temperature conditions of sewage sludge pyrolysis to produce three-phase products were optimized using a method of the orthogonal experimental design in this study. The three-phase sludge pyrolysis products were solid tar, liquid fuel and gas. The maior factors affecting the quality of pyrolysis products and their relationship were analyzed through assessment indexes, including yield ratio and calorific value. The factors are in a decreasing order., ending temperature, residence time, and heating rate. The optimal pyrolysis conditions to produce three- phase sludge pyrolysis products with higher yields and higher calorific values were obtained. The factors affecting the efficiency of sludge pyrolysis were complex, but the method of orthogonal experimental design can be reliable to analyze these major factors and determine the reliable operation parameters of pyrolysis process. This study could provide useful information for the industrialization implementation of sewage sludge pyrolysis technology.

关 键 词：污水污泥 低温热解 正交试验设计 

分 类 号：X705[环境科学与工程—环境工程]