城市污水污泥热解特性及动力学规律研究  

Study of the Pyrolytic Characeristics of and the Dynamic Law Governing Municipal Sewage Water and Sludge

作　　者：胡艳军[1] 宁方勇[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310024

出　　处：《热能动力工程》2012年第2期253-258,270,共6页Journal of Engineering for Thermal Energy and Power

基　　金：浙江省自然科学基金资助项目(Y5100258);浙江省科技厅公益型科研基金资助项目(2010C33058)

摘　　要：采用差热-热重分析法对不同反应条件下的污泥热解特性及动力学规律展开研究。结果表明:污泥的非等温热解过程包含4个失重阶段;提高升温速率和降低氮气吹扫速率可促进污泥热解转化效率增加、挥发份最大失重率增大、表观活化能E值和频率因子A值增大;加入不同类型催化剂也提高了污泥热解转化效率,使热解过程向低温区移动;加入KCl催化剂使污泥热解DTG曲线向低温移动最多,加入Na2CO3使污泥最大失重率达到11.8%,是未添加催化剂时的2.7倍;添加催化剂也降低了表观活化能E值、提高了频率因子A值,且Na2CO3的加入使挥发份在主要析出阶段的表观活化能E值降低了约30%。The temperature difference-thermogravimetric method was employed to study the pyrolytic characteristics and dynamic law of sludge under different reaction conditions.It has been found that the nonisothermal pyrolytic process of sludge involves 4 stages of weight loss.To enhance the temperature rise rate and lower the nitrogen purge rate can improve the sludge pyrolysis conversion efficiency and increase the volatile weight loss rate,apparent activation energy E value and frequency factor A value.To add in catalysts in differnent kinds can also improve the sludge pyrolysis conversion efficiency,making the pyrolytic process move towards the low temperature zone.To add in KCl catalyst can make the sludge pyrolytic DTG curve shift towards the low temperature zone to an maximal extent.To add in Na2CO3 can make the sludge attain its maximal weight loss rate of 11.8%,2.7 times as much as that when no catalyst is added.To add in catalysts can lower the apparent activation energy E value and enhance the frequency factor A value and the addition of Na2CO3 makes the apparent activation energy E value of the volatile content lower by about 30% in the main separation stage.

关 键 词：污水污泥 热重分析 动力学 升温速率 催化剂 

分 类 号：X705[环境科学与工程—环境工程]