Experimental Study on Combustion and Kinetic Characteristics of Mixed Industrial Sludge

It is necessary to study the process of industrial sludge combustion to utilize it efficiently.The combustion characteristics of three types industrial sludge and their mixtures were done by using thermogravimetric analysis(TGA).Results indicate that the ignition and carbon burnout characteristics of industrial sludge with higher portion of volatiles and lower portion of fixed carbon is better whereas its general combustion characteristics is not better.In addition,the ignition temperature has relative with the portion and component of volatiles,whereas carbon burnout characteristics turn worse but general combustion characteristics turn better as the portion of fixed carbon increases.The combustion of giving out heat includes volatile burns and fixed carbon burns two phases,the former's peak of giving out heat is obvious and the activated energy is low,whereas the latter's peak of giving out heat is not obvious and the activated energy is relative high.What's more,the experimental results show that the parent industrial sludges keep their own individual ignition and carbon burnout characteristics in blend combustion.In general,the behavior of a mixture of industrial sludge in TGA can be expressed by simple combination of individual components of the industrial sludge mixtures.