LNASB型旋流燃烧器结构对锅炉NO_x排放及燃烧性能的影响  

Influence of LNASB swirl burner structure on NO_x emission and combustion performance

作　　者：周平[1] 秦建柱[2] 黄俊谐 刘伟[2] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]华能东方电厂,海南东方572600

出　　处：《热力发电》2015年第4期82-87,共6页Thermal Power Generation

基　　金：中国华能集团公司科学技术项目(HNKJ12-H03)

摘　　要：某厂LNASB型旋流燃烧器喷口的结构变化对锅炉燃烧性能及NOx排放影响较大,可使NOx排放降低150mg/m3左右,但会带来尾部CO浓度增加及燃烧高挥发分煤种时二次风喷口容易结渣及烧损变形问题。分析认为,在保证一、二次风速设计的基础上,采用扩锥型一、二次风喷口并将局部浓缩的煤粉浓缩器改为内浓外淡船型煤粉浓缩器,在进一步降低NOx排放的同时,也可缓解二次风喷口的结渣及烧损变形问题。Changes in LNASB swirl burner＇s structure in a power plant can decrease the NOx emission by 150 mg/m3. However,the CO concentration in the tail duct increased and slagging and damage deformation easily occurred round the secondary air nozzle when high volatile coals were fired. Analysis shows that, on the basis of ensuring the primary and secondary air speed design,applying the cone type nozzle and replacing the local concentrator into internal consistency and external light pulverized coal concentrator can re- duce NOx emissions and also relieve the slagging and damage deformation problems.

关 键 词：旋流燃烧器 LNASB型 喷口结构 结渣 煤粉浓缩器 燃烧性能 NOX排放 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]