摘要
将对流换热器和填充床中火用传递系数的概念引入到竖罐式余热回收工艺中,推导出烧结移动床层火用传递系数公式;在自制的气固传热实验装置上,测定不同工况下罐体料层内气固传热过程的相关数据,研究冷却风量对烧结床层火用传递系数的影响.研究结果表明:冷却风量不变时,平均物理火用传递系数hex,m随矿温的升高而增大;相同平均矿温条件下,当hex,m大于0时,hex,m随冷却风量的增加而增大;当hex,m小于0时,会导致竖罐出口冷风火用值减少,对强化气固换热不利.
The exergy transfer coefficient formula in sintering moving bed was derived by introducing the concept of the exergy transfer coefficient in the convection heat exchanger and fixed bed into the vertical tank of sintering waste heat recovery. The relevant data of gas-solid transfer process under different conditions in sinter bed of vertical tank was measured in homemade gas-solid heat transfer experiment device, and the effect of the cooling air volume on the exergy transfer coefficient in sinter bed was investigated. The results showed that the average physical exergy transfer coefficient h increased with the increase of the ore temperature when the cooling air volume was constant. At the same average ore temperature,when h was greater than zero, it increased with the increase of the cooling air volume; when h is less than zero it reduced air cooling exergy value of vertical tank outlet and adversed to strengthen gas-solid heat transfer.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第5期708-711,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51274065)
关键词
烧结
余热
回收
气固换热
火用传递系数
sinter
waste heat
recovery
gas-solid heat transfer
exergy transfer coefficient
