氮气稀释富氢合成气高压燃烧特性数值模拟  

Numerical study on combustion characteristics of nitrogen diluted hydrogen-rich syngas at high pressures

作　　者：付忠广[1] 卢可[1] 周扬[1] 朱一鸣[1] 刘雪琦[1] 

机构地区：[1]华北电力大学国家火力发电工程技术研究中心,北京102206

出　　处：《热力发电》2014年第11期19-23,共5页Thermal Power Generation

基　　金：中央高校基本科研业务费专项资金资助(13XS09;2014ZZD04)~~

摘　　要：为研究高压下氮气稀释富氢合成气的微混合燃烧规律,利用常压燃烧试验校正模型对不同压力、功率和当量比下的温度场、火焰形态以及污染物排放进行了计算分析。结果表明,随着压力的升高,燃烧器火焰温度和出口温度先升高后略微下降,火焰宽度逐渐变小,火焰高度有增大趋势,NOx排放指数升高,但在压力>14 MPa时,趋势变缓。Aiming at investigating the micro-mixing combustion characteristics of nitrogen diluted hydrogen-rich syngas at high pressures,the combustion model corrected at atmospheric pressure was adopted to ana-lyze the temperature field,flame shape and pollution emissions under conditions with different pressures, powers and equivalent ratios.The results show that,with an increase in pressure,the flame temperature and outlet temperature of the burner rose first and then dropped slightly;the flame width decreased gradu-ally while its height grew;the NOx emission indexes increased and tended to be smooth when the pressure increased to higher than 1 4 MPa.

关 键 词：IGCC 氮气稀释 富氢合成气 高压燃烧 微预混 NOx 排放 数值模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]