水冷炉排数值模拟研究

Numerical Simulation Research on Water-Cooled Grate

由于城市生活垃圾热值的提高,垃圾焚烧炉燃烧温度不断升高,传统空冷炉排技术已不能满足高热值生活垃圾焚烧需求。采用数值模拟方法研究了新型水冷炉排,结果显示:水冷炉排表面热流密度约为5000~60000 W/m^(2),相对常规空冷炉排在燃烧段接触面平均热流密度4236~6628 W/m^(2),冷却换热效果可为空冷炉排的10倍,冷却效果显著提升。同时,采用水冷炉排能够将炉排表面平均温度从350℃降至130℃,延长了炉排寿命。

Due to the increase in the calorific value of MSW,the combustion temperature of the garbage incinerator is higher.Traditional air-cooled grate is unable to meet the demand for high calorific value MSW incineration.By numerical simulation research on water-cooled grate,the surface heat flux density of air-cooled grate is 4236~6628 W/m^(2),but water-cooled grate is about 5000~60000 W/m^(2),which is 10 times than air-cooled grate.Compared to air-cooled grate,water-cooled grate can reduce the average surface temperature of the grate from 350℃to 130℃,extending the life of the grate.