Study on pyrolysis characteristics and dynamic parameters of Wulagai lignite
Li Xingzhi
Fang Shunli
Yao Wei
Yang Zhongcan
Abstract：To obtain better process parameters of semi-coke for lignite,the effects of heating rate,temperature,atmosphere and particle size on pyrolysis characteristics and dynamic parameters of Wulagai lignite were investigated.The resuhs show that the final pyrolysis temperature is the main influencing factor,the heating rate,pyrolysis atmosphere and particle size have little influence.When the final pyrolysis temperature increases from 350 ℃ to 600 ℃,The rejection index (RI) varies from 235 ℃ to 292 ℃,the burnout index (Cb) varies from 4.68 to 6.15,the explosive index(Kd) decreases from 2.54 to 0.46,the activation energy (E) varies from 44.4 kJ/mol to 63.4 kJ/mol.In the above changes,the fire behaviour,burnout performance and explosive tendency of Wulagai lignite semi-coke become worse.The semi-coke which is obtained at 520 ℃ pyrolysis temperature is easy to burn,burn out and difficult to explode,and the rejection index,the burnout index,the explosive index and the activation energy are 265 ℃,5.34,0.80,53.2 kJ/mol.
Keywords：lignitesemi-cokepyrolysis characteristicscombustion characteristicsdynamic parameters
Publication Date：2017-01-01