水冷机械炉排块冷却性能分析及强度校核

Analysis of Cooling Performance and Strength Check of Water-cooled Mechanical Grate Block

随着生活垃圾热值的不断升高,机械炉排的工作环境变得更加恶劣,高热值垃圾燃烧时产生的高热流会影响机械炉排的工作稳定性。为避免燃烧高热值垃圾时,对机械炉排造成不可逆损伤,提高机械炉排的稳定性,以某型号水冷机械炉排的水冷炉排块为研究对象,研究其在不同条件下的冷却性能并进行强度校核。分析研究了不同温度载荷下,水冷炉排块与空冷炉排块的平均温度差,评价水冷炉排块的冷却效果。分析研究了不同冷却水入口温度、流速条件下,水冷炉排块的平均温度,明确了冷却水流速和温度的选择。并采用热-力耦合的方法,校核水冷炉排块的强度。结果表明,水冷炉排块能够有效的降低炉排表面温度,相较于空冷炉排块能够降低130~210℃,并且水冷炉排块的强度符合要求,能够满足正常运行。研究内容为水冷机械炉排的设计提供参考。

With the increase of calorific value of domestic waste,the working environment of mechanical grate becomes more and more severe,and the combustion of high calorific value waste produces high heat flow,which affects the working stability of mechanical grate.In order to avoid irreversible damage to the mechanical grate when burning high calorific value refuse and improve the stability of the mechanical grate,the water-cooled grate block of a certain type of water-cooled mechanical grate is taken as the research object to study its cooling performance under different conditions and carry out strength check.The average temperature difference between water-cooled grate block and air-cooled grate block under different temperature loads is analyzed,and the cooling effect of water-cooled grate block is evaluated.The average temperature of water-cooled grate block under different inlet temperature and flow rate of cooling water is analyzed and studied,and the choice of flow rate and temperature of cooling water is clarified.The strength of water-cooled grate block is checked by the method of heat-force coupling.The results show that the water cooled grate block can effectively reduce the grate surface temperature,compared with the air cooled grate block can reduce 130~210℃,and the strength of the water cooled grate block meets the requirements,and can meet the normal operation.The research content provides reference for the design of water-cooled mechanical grate.