热价值理论及其在加热炉节能中的应用  

Thermal Value Theory and Its Application to Energy-Saving for Continuous Heating Furnace

作　　者：蔡九菊[1] 孙文强[1] 谢国威[1] 

机构地区：[1]东北大学国家环境保护生态工业重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2009年第10期1454-1457,共4页Journal of Northeastern University(Natural Science)

基　　金：国家"十一五"科技支撑计划项目(2006BAE03A00)

摘　　要：给出了预热助燃空(煤)气和热装时的热价值计算公式,比较加热炉的热工指标,指出热价值可以合理评价热能在加热炉中的有效利用状况.建立了炉内逆流换热模型,主要利用热价值理论研究了预热空(煤)气和热装对热价值的影响.结果表明:提高预热温度,热价值升高,且随着预热温度的进一步提高,热价值的增长率变小;热装可以使热价值升高,且热装温度越高,其热价值的增长率越大;设计时,当装料温度较高时应选择小的炉长,预热温度较高时应选择大的炉长.Some calculation formulas of thermal value were proposed for air/gas preheating and hot charging. Several pyrological indexes were compared, and the thermal value was found available to evaluate reasonably whether the heat is utilized efficiently in continuous heating furnace~ Then, a model of counter-flow heat transfer in heating furnaces was developed to investigate mainly the influences of air/gas preheating and hot charging on thermal value. The results showed that the thermal value increases with increasing preheating temperature, but its increase rate decreases with the continually increasing preheating temperature. The higher the hot charging temperature, the higher the increase rate of thermal value is. In the design of continuous heating furnace, short length should be chosen if charging temperature is high, whereas long length should be chosen if preheating temperature is high.

关 键 词：热价值 连续式加热炉 节能 预热 热装 逆流换热 

分 类 号：TF061.1[冶金工程—冶金物理化学]