中国电机工程学报2012，Vol.32Issue(8)：19-27,9.
1000MW超超临界旋流燃烧锅炉稳燃特性数值模拟与优化
Numerical Simulation and Optimization on Stable Combustion of a 1 000 MW Ultra Supercritical Unit Swirl Combustion Boiler
刘建全 1孙保民 1张广才 2白涛 1寿兵 2胡永生1
作者信息
- 1. 电站设备状态检测与控制教育部重点实验室华北电力大学,北京市昌平区102206
- 2. 西安热工研究院有限公司,陕西省西安市710032
- 折叠
摘要
Abstract
The combustion process of a 1 000 MW ultra supercritical boiler was numerically studied with realizable k-model.The influences of burner heat flow field and temperature field distribution on different primary air and secondary air outlet structure shape were studied,and emission of NO was considered.Three improving programs of the burner were compared.The results of numerical simulation show that,when the secondary air outlet expanding angle and the axial length are large,the flame shape is short and wide,emission concentrations of NO is low.Combustion is unstable when the quality of coal is bad.When the secondary air outlet expanding angle is small and the axial length is short,combustion stability of coal center and original structure burner are both increased.At the same time,NO emission of the boiler increases.The combustion stability could increase effectively when the axial length of secondary air expanding outlet is reduced to 1/2 with the NO emission not being improved obviously,which was the best improvement program.That was compared with the improved test results,consistent results were obtained.It provides a reference and basis for large-capacity swirl boiler instability combustion,and a theoretical basis for the design and operation of the HT-NR3 burner.关键词
可实现k-双方程模型/HT-NR3燃烧器/稳燃特性/二次风口结构/数值模拟Key words
realizable k-model HT-NR3 burner combustion stability trait secondary outlet structure numerical simulation分类
能源科技引用本文复制引用
刘建全,孙保民,张广才,白涛,寿兵,胡永生..1000MW超超临界旋流燃烧锅炉稳燃特性数值模拟与优化[J].中国电机工程学报,2012,32(8):19-27,9.
