WANG Tingting1,2, ZHU Jianguo1,2, SHI Yongshuai1,2, ZHANG Zhen1,3
(1.Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China)
Abstract: Based on the comprehensive evaluation experimental platform of kilowatt-level pulverized coal preheating combustion, this paper conducted experimental research on low-load preheating combustion characteristics and dynamic response characteristics of load changes.The results show that when the experimental platform runs under the load of 30%, the preheating temperature reaches 900 ℃, and the preheating combustion system works stably, the CO emission in the flue gas is 25 mg/m3, and the NOx emission is 150 mg/m3.When the load increased from 30% to 42%, the preheating temperature change rate is 3.2 ℃/min, the load increasing rate of the preheating chamber is 2.4%/min, the temperature change rate of the horizontal combustion chamber is 4.1 ℃/min, and the load increasing rate of the horizontal combustion chamber is 1.3%/min.During the load increasing process, the CO2 content volume fraction of the preheating gas first decreases and then increases, the CO and H2 content volume fraction first decreases and then increases, and the CH4 content volume fraction remains basically unchanged.The mass concentration of CO content in the tail flue gas increases first and then decreases, and the mass concentration of NOx first decreases and then increases.
Keywords: coal powder; variable load; combustion characteristics; dynamic changes
中图分类号：TQ534 文献标志码：A
文章编号：1008-5548(2022)03-0001-08
DOI:10.13732/j.issn.1008-5548.2022.03.001
收稿日期： 2022-01-19， 修回日期：2022-03-07，在线出版时间：2022-04-08。
基金项目：中国科学院战略先导科技专项项目，编号：XDA21040100。
第一作者简介：王婷婷(1996—)，女，硕士研究生，研究方向为预热燃烧技术。E-mail：wangtingting@iet.cn。
通信作者简介：朱建国(1977—)，男，研究员，硕士生导师，研究方向为预热燃烧技术。E-mail：zhujianguo@iet.cn。
