作　　者： ; ; ; ; ; (卓钟旭）; (莫如松）;

机构地区： 广东工业大学环境科学与工程学院

出　　处： 《环境科学学报》 2015年第6期1842-1850,共9页

摘　　要： 利用热重分析仪(TG-DTG)研究了Fe Cl3/Ca O添加量和升温速率对深度脱水市政污泥燃烧特性的影响,并得出污泥燃烧的动力学参数.试验结果表明,Fe Cl3/Ca O深度脱水后的泥样燃烧过程中有4个失重阶段:水分的析出、挥发分1的燃烧、挥发分2和固定碳的燃烧、以碳酸钙的分解为主的无机物分解.随着调理剂添加量的增加,可燃性指数和挥发分特征指数得到提高,有利于污泥初期的燃烧;而燃尽指数和综合燃烧特性指数先略微上升后降低,适量的添加量有助于污泥燃烧.燃烧动力学计算表明,反应峰前的反应级数一般取0.5,峰后取2,表观活化能随Fe Cl3/Ca O添加量的增加而升高. Effects of FeCl3/CaO dosage and heating rate on the combustion characteristics of deeply dewatered sewage sludge were investigated by thermogravimetric analysis( TG-DTG). Then the parameters of combustion kinetics of the sludge were calculated. The results indicated that four degradation stages,dehydration,combustion of volatile 1,combustion of volatile 2 and the fixed carbon,and decomposition of inorganic matter mainly CaCO3,were identified in the combustion process of the deeply dewatered sewage sludge. As the dosage increased,both the combustion index and the devolatilization index were improved,which showed that FeCl3/CaO addition was helpful for the initial combustion. However,the burnout index and the general combustion parameter increased slightly then decreased,which implies the appropriate dosage was favorable for combustion. According to the dynamics calculation,the reaction order of pre-peak was 0. 5 and post-peak was 2. The apparent activation energy would increase with the addition of FeCl3/CaO.

关 键 词： 深度脱水 市政污泥 燃烧特性 动力学

领　　域： [环境科学与工程]