旋流燃烧室内分级进风对燃烧污染物生成的影响

• 作 者: 徐采松 胡瓅元 罗永浩
• 机 构: 上海交通大学机械与动力工程学院,
• 出 处: 动力工程
• 发表日期: 2009年05期
• 关键词: 旋流 燃烧室内 旋流燃烧室 湍流旋流燃烧 分级进风 NO生成 旋流燃烧 天然气燃烧 煤粉燃烧 湍流燃烧

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.

A turbulent combustion chamber test device was set up by using the step-by-step air inlet method, and the turbulent swirling combustion of natural gas and pulverized coal was carried out on this test device respectively.When the excess air ratio and the number of swirl were kept . The distributions of the average temperature field, the concentration of O2, CO and NO in the combustion chamber were measured with different inlet air ratios. The effect of the inlet air ratio on the turbulent combustion and the generation of pollutants The results show that increasing the secondary swirling wind rate can reduce the NO generation during natural gas combustion and increasing the secondary swirling wind rate will increase the NO generation in the process of pulverized coal combustion.