污泥与地沟油制混合燃料的燃烧特性

The Combustion Characteristic and Kinetic of Fuels Constituted with Sludge and Waste Cooking Oil

市政污泥和地沟油混合制备新型燃料为废弃物资源化利用提供了新方法.文中利用热重-差示扫描量热同步分析仪对不同混合比例(污泥与地沟油的质量比分别为1∶0.0,1∶0.1,1∶0.2,1∶0.3,1∶0.4,0∶1.0)的燃料燃烧特性进行了研究,结果显示燃烧特性指数随着地沟油混入比例的增加而增加,而燃尽温度却相反,表明地沟油的混入有利于污泥的燃烧与燃尽.通过对10、20、30℃/min升温速率下Ozawa-Flynn-wall(OFW)和Friedmen两种无模型方法反应动力学的分析,并计算平均活化能发现:混合质量比为1∶0.3时,混合燃料的平均活化能最小,其值分别为149.2 k J/mol(OFW)和139.5 k J/mol(Friedmen),此时混合燃料还具有较低的燃尽温度(575.5℃).

The new fuels are fabricated by mixing municipal sludge（ MS） with waste cooking oil（ WCO）,providing a new method for waste resource utilization. The combustion characteristic of fuels with different blending ratios（ the mass ratios between sludge and waste cooking oil are 1∶ 0. 0,1∶ 0. 1,1∶ 0. 2,1∶ 0. 3,1∶ 0. 4,0∶ 1. 0,respectively） are investigated by means of thermogravimetric simultaneous thermal analyzer in the paper,and the result shows that the combustion characteristic indexes increases with the rise of waste cooking oil proportion,while the burnout temperature behaves oppositely,which suggests that the addition of WCO is beneficial for the combustion and burnout of MS. The reaction kinetics is analyzed by Ozawa-Flynn-Wall and Friedmen methods（ two model-free methods） at the heating rate of 10,20,30 ℃/min,finding after calculating the average activation energy that： When the mixing mass ratio is 1∶ 0. 3,the average activation energy of the blended fuel reaches the minimum with the values of 149. 2 k J/mol（ OFW） and 139. 5 k J/mol（ Friedmen）,respectively,and here the blended fuels at the mass ratio possess a lower burnout temperature（ 575. 5 ℃）.