Li Xingzhi;Fang Shunli;Yao Wei;Yang Zhongcan;

• 1:Thermal Power Research Institute Co.
• 2:Ltd.

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 results 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(C_b) varies from4. 68 to 6. 15,the explosive index(K_d) decreases from 2.54 to 0.46,the activation energy( E) varies from 44.4 k J/mol to 63.4 k J/mol.In the above changes,the fire behaviour,burnout performance and explosive tendency of Wulagai lignite semi-coke become worse.The semicoke 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 k J/mol.

Key Words： lignite;semi-coke;pyrolysis characteristics;combustion characteristics;dynamic parameters

Abstract:

Keywords:

Foundation: 国家能源应用技术研究及工程示范资助项目(NY20130303);; 陕西省科技统筹创新工程计划资助项目(2015KTZDGY05-03)

Authors: Li Xingzhi;Fang Shunli;Yao Wei;Yang Zhongcan;

DOI: 10.13226/j.issn.1006-6772.2017.02.008

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