Combustion Characteristics and Kinetics Study of Pulverized Coal and Semi-Coke

High Temperature Materials and Processes

Yang Zhihong¹  Yang Guisheng¹  Zhang Jinliang¹  Shao Jiugang²  Yang Zhanhai² 

[1] Faculty of Metallurgical＆ Materials Engineering, Kunming Metallurgy College, Kunming, Yunnan 650033, China;Handan Iron and Steel Company, Hebei Iron and Steel Group, Handan, Hebei 056015, China;

关键词: pulverized coal injection;    thermogravimetric analysis;    combustion characteristics;    kinetics;   

DOI  :  10.1515/htmp-2019-0034

来源: DOAJ

【 摘 要 】

Combustion process of bituminous coal, steam coal, anthracite (AC) and semi-coke were investigated through thermogravimetric analysis method and influence of metamorphic grade as well as heating rate on combustion characteristics were analyzed. Results show that combustion performance could not be represented by single combustion characteristic parameter. Through analysis of comprehensive combustion characteristic indexes, with increase of metamorphic grade combustion performance of coal is lowered, and combustion performance of semi-coke and AC are close to each other. With increase of heating rate, combustion curves move into high temperature region and comprehensive combustion characteristic indexes are increased, which show that the combustion performance is improved. Random pore model (RPM), unreacted shrinking core model (URCM) and volume model were used to calculate kinetic parameters of combustion process. Results show that RPM has the best performance to represent combustion process of the four samples and through calculation by RPM kinetic energy of combustion process for all samples are between 43.08 and 99.43 kJ/mol, and there is compensation effect during combustion process.

【 授权许可】

Unknown