中国电机工程学报2001，Vol.21Issue(1)：80-84,5.
用改进的焦碳模型研究煤粉锅炉内的燃烧行为
FURTHER STUDIES ON THE COAL COMBUSTION BEHAVIOR IN THE TANGENTIALLY FIRED BOILER FURNACE
刘向军 1徐旭常 2范宏丽2
作者信息
- 1. 北京科技大学热能系,北京 100083
- 2. 清华大学热能系,北京 100084
- 折叠
摘要
Abstract
The coal combustion behavior in a tangentially fired boiler furnace is numerically studied using a modified char combustion model. Coal particles with different lithologic characteristics are studied with the consideration of the graphitization effects during combustion process. Calculated result of unburning-heat loss is in good agreement with the practical data. The numerical result also shows that the rapid grahitization of coal particles in high temperature results in continuously decreasing combustion rate. Thus, some of the coal particles which are originally easy to burn become difficult to burn out. Therefore the unburning-out rate and the deviation of unburning heat between the right side and left side in the outlet of the furnace are apparently intensified. This unburning heat deviation will cause deviation of the gaseous temperature and heat distribution, and thus led to overheating and explosion of the reheaters and superheaters.关键词
四角切向燃烧煤粉锅炉/数值研究/煤粉燃烧/超温爆管Key words
tangential-firing boiler furnace/numerical studies/coal combustion/tube-burst分类
能源科技引用本文复制引用
刘向军,徐旭常,范宏丽..用改进的焦碳模型研究煤粉锅炉内的燃烧行为[J].中国电机工程学报,2001,21(1):80-84,5.
