几种典型工业污泥及混合物热解特性影响因素

利用热重法,研究了3种典型工业污泥(制药,造纸、啤酒)及其混合物在不同影响因素下:热解温度、样品粒度、升温速率、热解压力、添加含金属元素化合物时的热解特性,研究得到热解机理方程式和反应动力学参数。结果表明,热解温度与压力、升温速率、样品粒度和升温速率污泥热解特性有重要影响,特别是添加了含金属元素化合物后,促进污泥热解有明显作用;3种典型工业污泥在低、中、高温段热解反应级数n分别为1,1.5,2.0,其热解特性参数并没有因为工业污泥试样的混合而显著改变;工业污泥热解特性表现出与煤矸石料相同特性,热解初期活化能和频率因子较低,随着热解温度升高,活化能和频率因子均增大,特别是在热解后期,活化能和频率因子都较高。

Thermogravimetric study on the pyrolysis performance and its impactfactors of several kinds of typical industrial sludge

Thermogravimetric analysis is used to determine the pyrolysis performance of three types of industrial sludge and their mixed samples at different pyrolysis temperature,sample diameter,heating rate,pyrolysis pressure and adding different metal element compounds.At the same time,the pyrolysis mechanism equations and pyrolysis reaction parameters are obtained.The results indicate that the pyrolysis temperature,sample diameter,heating rate,pyrolysis pressure play an important role in the pyrolysis process for industrial sludge.The metals element compounds can improve the pyrolysis performance of industrial sludge.The pyrolysis reaction progression is respectively 1,1.5,and 2.0 in low,medium and high temperature segment for three types of industrial sludge,the pyrolysis character of mixed sludge isn't obviously changed.The pyrolysis characters of the industrial sludge are alike as the coal residue,the activation energy and the frequency factors are smaller at the initial pyrolysis process,they are increased with the increase of the pyrolysis temperature.The activation energy and the frequency factors are enhanced at the end of pyrolysis.