化工进展2017，Vol.36Issue(9)：3237-3242,6.DOI:10.16085/j.issn.1000-6613.2017-2034
异距贴壁风喷口布置方案的数值模拟
Numerical simulation of near-wall air scheme combined with different jet
position
孟凡冉 1高畅 1金保昇 1张勇1
作者信息
- 1. 东南大学能源热转换及其过程测控教育部重点实验室,江苏南京 210096
- 折叠
摘要
Abstract
In order to eliminate the high temperature corrosion of the side water-cooled wall in a 600 MW front and rear wall swirl-opposed firing boiler,three layers of opposed near-wall air nozzle were punched in the front and rear walls. The boiler combustion of original condition and near-wall air condition with different nozzle arrangement schemes was simulated by use of Fluent. The distribution of reductive atmosphere of near-wall region was emphatically focused on. The results showed that the simulation results agreed with the actual operation condition of boiler and the anti-corrosion performance of different nozzle patterns was limited. Due to the push of rising flue gases from the bottom,the nozzle arrangement had a great influence on the effect on anti-corrosion. In addition,by adjusting the position of nozzle and combining the nozzle flow characteristics,the coverage of reductive atmosphere in the near-wall region maintained at a low level while the ratio of near-wall air was less than 4％,indicating that the front and rear wall arrangement scheme can effectively restrain the high temperature corrosion of the side water-cooled wall on the basis of the combination of appropriate nozzle positions and nozzle flow velocity.关键词
旋流对冲锅炉/高温腐蚀/异距喷口布置方案/数值模拟Key words
swirl opposed boiler/high temperature corrosion/scheme with different jet distances/numerical simulation分类
化学化工引用本文复制引用
孟凡冉,高畅,金保昇,张勇..异距贴壁风喷口布置方案的数值模拟[J].化工进展,2017,36(9):3237-3242,6.
