本文对煤粉在四角切向燃烧煤粉锅炉炉膛内的燃烧行为进行了数值研究。在计算中，将煤岩学对煤进行分类研究的思路引入燃烧学，对煤粉中所含不同煤岩类别的煤粒分别进行了研究。结果表明, 煤粉中的部分难燃组分在炉膛内未能燃烬；炉膛出口处颗粒的浓度存在较明显的偏差,右侧浓度较大, 未燃成分较多；煤粉的未燃烬及浓度偏差对四角切向燃烧煤粉锅炉的局部超温爆管现象有直接的影响, 且三次风的影响更为严重。
The coal combustion behavior in the tangential-firing boiler furnace isnumerically studied. In the calculation, pulverized coal particles aredivided into 4 types according to their lythologicals and are studiedrespectively. The obtained results indicate that some of the coal particlesdo not burn out in the furnace, there is an obvious particle-density-diviationat the exit of the furnace, the particle-density of the right part is higherthan that of the left part. The unburn-out and density-diviation of thepulverized coals have direct influences on the over-heating and burst of thetubes in the tangential-firing boiler furnace, especially do the coal particlesdischarged from the tertiary-air nozzles.
参考文献
| [1] | 王世昌;徐旭常 .宏观煤岩分类及燃烧反应动力学参数[J].工程热物理学报,1996,17(02):229-233. |
| [2] | 范宏丽 .煤粉燃烬特性的研究[D].清华大学,1996. |
| [3] | 舒新前 .煤中难燃组分的确定及燃烬特性的研究[R].清华大学博士后出站报告,1997. |
| [4] | 刘向军 .四角切向燃烧煤粉锅炉炉内燃烧过程的数值模拟[D].清华大学,1997. |
| [5] | 刘向军;徐旭常 .采用不同网格比较伪扩散对四角切圆型炉膛流场计算的影响[J].燃烧科学与技术,1997,3(02):113-119. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%