篦冷机中气固两相换热过程的模拟研究  

Simulation study on heat transfer between clinker and gas of the grate cooler

作　　者：冯绍航[1] 徐德龙[1] 李辉[1] 陈延信[1] 肖国先[1] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2007年第2期224-229,234,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家863基金项目(2003AA33X060)

摘　　要：在合理的假设前提下,以日产1000吨熟料的篦冷机为研究对象,建立了篦冷机内部换热的数学模型,开发出用于该模型计算的Fortran程序,并对计算结果进行验证,验证结果表明该模型能够比较准确地反映了实际情况.利用该程序研究了骤冷区篦下风速、后冷却区篦下风速和熟料颗粒粒径等因素对篦冷机工作特性的影响.结果表明:骤冷区和后冷却区篦下风速对熟料的冷却效果影响最大,而且都呈指数衰减规律;熟料颗粒粒径对熟料的冷却影响较大,排出熟料温度随二者的增加而线性增加.Based on the reasonable hypotheses, a mathematical model of heat transfer between gas stream and clinker in a grate cooler with an output of 1000t/d is established. A computer program for this model is worked out in FORTRAN. The model is verified and the result shows that the model has efficient veracity. Several factors which may affect the operation of grate cooler are investigated by using the program. These factors are air velocity under grate in Quenching- Recuperation-Cooling （QRC） zone, air velocity under grate in Cooling （C）zone, and clinker size. The result shows that air velocities under grate in QRC zone and C zone have the most impact on clinker cooling. The temperature of discharged clinker decreases exponentially as air velocity increases. The clinker size has some effect on clinker cooling. The temperature of clinker leaving the cooler increases linearly as the driving velocity of grate bed and the clinker size increase.

关 键 词：篦冷机 数学模型 风速 粒径 

分 类 号：TQ172.622.4[化学工程—水泥工业]