摘要
为研究不同的气化剂组合对气流床煤气化炉性能的影响,针对我国具有自主知识产权的两段式干煤粉气化炉进行了数值模拟研究。利用所建立的数学模型,分析了典型工况下炉膛内部温度及组分的变化规律,并详细讨论不同气化剂对气化过程、煤气成分及气化效率的影响规律。结果表明:炉膛温度随着高度的增加逐渐降低,这与化学反应过程有关;在所讨论的四种气化剂组合中,气化剂为O2/H2O或O2/CO2时气化效率较高,气化剂为空气时气化效率最低,且煤气品质较差。
To study the effects of different gasification agents on the entrained flow coal gasifier, a simulation study for a two-stage dry feed was carried out. Using the CFD model proposed, gas temperature and mo gasification performance of gasifier developed in China le fraction changes inside of the gasifier were analyzed under the typical situation. And the effects of different gasification agents on the gasification process, product gas components, gasification efficiency were discussed in detail. The results show that the gas temperature decreases along the gasifier height resulted from the chemical reactions in the gasifier. For the four gasification agents discussed, the gasification efficiency is high when the gasification agent is O2/H2O or O2/CO2. The gasification efficiency is the lowest and the syngas quality is poor when the gasification agent is air.
出处
《热科学与技术》
CAS
CSCD
2009年第2期177-182,共6页
Journal of Thermal Science and Technology
基金
国家重点基础研究发展计划资助项目(2004CB217703)
关键词
气流床气化炉
气化性能
数值模拟
气化剂
entrained flow coal gasifier
gasification performance
numerical simulation
gasification agent
