不同氧浓度下污水污泥热重燃烧特性研究  

STUDY ON THE COMBUSTION CHARACTERS OF SEWAGE SLUDGE UNDER DIFFERENT OXYGEN CONCENTRATIONS BY USING THERMOGRAVIMETRIC ANALYSER

作　　者：刘伟[1] 金余其[1] 池涌[1] 

机构地区：[1]浙江大学热能工程研究所,浙江杭州310027

出　　处：《热力发电》2012年第1期42-45,共4页Thermal Power Generation

基　　金：国家高技术研究发展计划专项经费资助(2009AA064704);水体污染控制与治理科技重大专项资助(2009ZX07317-003);浙江省重大科技专项(2008C13022-3)

摘　　要：利用热重分析仪对污泥在不同氧浓度下进行了热解和燃烧试验,分析了氧浓度对污泥燃烧特性的影响。研究结果表明,随着氧浓度的升高,整个燃烧过程的平均失重速率逐渐上升;低温段的失重速率随氧浓度升高而逐渐提高,失重极大值不断增大且出现时间提前;高温段的平均失重速率不断提高,在氧浓度50%时达到最大值,失重极大值逐渐减小而出现时间提前。污泥着火温度随氧浓度上升而有所降低。By using the thermogravimetric analyser, the pyrolysis and combustion test of sludge under different oxygen concentrations has been carried out, the influence of oxygen concentration upon the combustion characters of sludge being analysed. Results of study show that the average weight loss speed in the whole combustion process increases gradually as the oxygen concentration rises, the maxi- mum value of weight loss increases continuously and appears earlier;the weight loss speed in high tem- perature stage continuouly increases and reaches maximum value when the oxygen concentration being 50%;the maximum value gradually reduces, and appears earlier. The ignition temperature decreases slightly as the oxygen concentration increases.

关 键 词：污泥 氧浓度 燃烧特性 热重分析 失重速率 

分 类 号：TK16[动力工程及工程热物理—热能工程]