旋流燃烧室内分级进风对燃烧污染物生成的影响  

Effects of Staged Air Injection on Combustion Pollutant Formation in a Swirl Combustor

作　　者：徐采松[1] 胡瓅元[1] 罗永浩[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《动力工程》2009年第5期445-450,共6页Power Engineering

基　　金：国家自然科学基金资助项目(50606026)

摘　　要：建立了采用分级进风方式的旋流燃烧室试验装置.在此试验装置上分别对天然气和煤粉进行了湍流旋流燃烧的试验研究.在保持过量空气系数和旋流数不变的条件下,采用不同分级进风比率时测量了燃烧室内烟气的时均温度场、O2、CO和NO浓度场的分布,并分析讨论了分级进风率对旋流燃烧室内湍流燃烧及污染物生成的影响.结果表明:在天然气燃烧过程中,加大二次旋流风率可减少NO的生成;在煤粉燃烧过程中,加大二次旋流风率会增加NO的生成.An experimental facility of swirl combustor with staged air injection was set up. Experimental studies on turbulent swirling combustion were carried out on the experimental facility with natural gas and pulverized coal separately. Maintaining the excess air ratio and swirl number as constant, the distribution of flue gas temperature field, Oz, CO and NO concentration fields were measured under different staged air injection ratios in swirl combustor. The effects o{ staged air injection ratio on turbulent combustion and pollutant formation were analyzed and discussed based on the experimental results. Results show that in natural gas combustion, increasing secondary swirl air ratio can reduce the formation of NO. In pulverized coal combustion, increasing secondary swirl air ratio can increase the formation of NO.

关 键 词：旋流燃烧室 湍流旋流燃烧 分级进风 NO生成 天然气燃烧 煤粉燃烧 

分 类 号：TK223.21[动力工程及工程热物理—动力机械及工程]