周界风对煤粉锅炉结渣特性影响的数值模拟  

Effect of surrounding air on slagging characteristics of a 600MW pulverized coal-fired boiler:numerical simulation

作　　者：樊保国[1] 寇炳女 王一丰[2] 林树彪[1,3] 蔡新春 金燕[1] 

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024 [2]西安交通大学能源与动力工程学院,陕西西安710049 [3]山西格盟国际能源有限公司,山西太原030001

出　　处：《热力发电》2014年第10期40-45,共6页Thermal Power Generation

基　　金：山西省社会发展科技攻关项目(20130313001-1)

摘　　要：针对某超临界600MW机组四角切圆燃烧锅炉燃烧器区域存在的严重结渣问题,借助Fluent软件对其燃烧过程进行了模拟。结果表明:结渣位于沿射流方向靠近喷口处,结渣的主要原因为该处氧含量低,烟气温度高于入炉煤的灰软化温度(ST);当周界风风速调整至60m/s时,各横截面结渣处温度均低于灰软化温度,可以解决锅炉结渣问题,提高锅炉运行的安全性和经济性。Serious slagging occurred in burner region of a tangentially-fired supercritical 600 MW unit boil-er.Numerical simulation was carried out for the combustion process with the Fluent software.The results show that the slagging position is close to the corners of the burner along the stream direction.Low oxygen content and high temperature （higher than the ash softening temperature （ST））are considered as the major reasons for slagging.When the surrounding air is increased to 60 m/s,the temperature at the slagging position of the cross section is lower than ST.By this way the slagging problem can be solved and the safe-ty and economy of the boiler operation can be improved.

关 键 词：锅炉 四角切圆燃烧 燃烧器 结渣 周界风 数值模拟 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]