摘要
以正戊烷-水为物系,进行了采用填料强化的鼓泡塔直接接触蒸发换热实验。实验采用顺流操作,考察了分散相流量、温差以及分布器孔径对体积换热系数和汽化高度的影响。实验得出:在戊烷流量为23.868 L/h,分布器孔径为2.5 mm时加填料的鼓泡塔的体积换热系数约为未加填料的2倍;在一定的操作条件下,加填料的鼓泡塔中汽化高度随分散相流量和分布器孔径的增大而增加,随温差的增大而减小;加填料的鼓泡塔中体积换热系数随分散相流量的增加而增加,随分布器孔径的增大而减小,与温差成负幂指数关系。
An experiment was carried out to study direct contact evaporative heat transfer performance with n-pentane and water in spray column with packing. Downstream operation was applied. The effects of pentane flow rate,temperature difference and distributor aperture on volumetric heat transfer coefficient and evaporative height were investigated. The results show that volumetric heat transfer coefficient in spray column with packing is twice as much as that without packing when pentane flow rate of 23. 868 L /h and distributor aperture of 2. 5 mm. Besides,evaporative height with packing increases with an increase of pentane flow rate and aperture distributor,a decrease of temperature difference. Volumetric heat transfer coefficient with packing increases with pentane flow rate increasing,distributor aperture reducing and has an exponential relation with temperature difference.
作者
魏世超
黄群武
蒋丽红
王一平
付海玲
Wei Shichao Huang Qunwu Jiang Lihong Wang Yiping Fu Hailing(School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, Chin)
出处
《化学工业与工程》
CAS
CSCD
2017年第1期84-89,共6页
Chemical Industry and Engineering
关键词
直接接触式换热
填料
体积换热系数
汽化高度
direct contact heat transfer
packing
volumetric heat transfer coefficient
evaporative height
