ZHANG Yi, ZHU Jianguo, LYU Qinggang, PAN Fei, ZHU Shujun

(Institute of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100190，China；University of Chinese Academy of Sciences，Beijing 100049，China)

Abstract: An experimental study on the preheating characteristics of Shenmu bituminous coal was carried out on a 30 kW preheating combustion experimental platform. The particle size, specific surface area, apparent morphology and carbon structure of Shenmu bituminous coal and preheated char were analyzed by a laser particle size analyzer, an automatic surface area analyzer, a field emission scanning electron microscope and a laser Raman spectrometer. The experimental results show that the preheating process has a function of modification and quality improvement on coal combustion in terms of physical properties. The preheated fuel has a smaller particle size, a larger specific surface area and a larger pore structure than the raw coal. During the preheating process, the degree of graphitization of the carbon frame structure was reduced, and the stable graphite structure of the carbon frame structure was transformed to the disordered active defect structure, resulting in an increase in the active defect carbon structure in the preheated fuel and enhancing combustion reactivity.

Keywords:bituminous coal；circulating fluidized bed；preheating characteristics；modification and quality improvement

中图分类号：TQ534                               文献标志码：A

文章编号：1008-5548(2019)06-0007-05

DOI:10.13732/j.issn.1008-5548.2019.06.002

收稿日期： 2019-06-26， 修回日期：2019-09-05，在线出版时间：2019-09-29 10:48。

基金项目：国家重点研发计划项目，编号：2018YFB0604201。

第一作者简介：张毅(1996—)，女，硕士研究生，研究方向为预热燃烧技术，E-mail：zhangyi18@iet.cn。

通信作者简介：朱建国(1977—)，男，博士，副研究员，硕士生导师，研究方向预热燃烧技术。E-mail：zhujianguo@iet.cn。