减压膜蒸馏热量回收过程研究  

Heat Recovery in Vacuum Membrane Distillation

作　　者：刘学晶[1] 李保安[1,2] 

机构地区：[1]天津大学化工学院,化学工程联合国家重点实验室(天津大学),天津300072 [2]天津市膜科学与海水淡化技术重点实验室,天津300072

出　　处：《化学工业与工程》2014年第2期38-42,共5页Chemical Industry and Engineering

基　　金："十一五"科技支撑计划项目(2006BAB03A06);天津市科技支撑计划项目(12ZCZDSF02200)

摘　　要：减压膜蒸馏作为一种新型的脱盐技术在海水淡化和高盐废水处理等方面具有广泛的应用价值。针对解决减压膜蒸馏过程中热量消耗大的问题展开了探索性研究,研制出了1套三级热量回收式减压膜蒸馏组件,考察了不同操作条件对热量回收利用率的影响。研究结果表明,所设计的热量回收式组件能够有效回收利用减压膜蒸馏过程中的蒸汽潜热,而进料液温度、进料液流速和蒸汽透过侧真空度等操作条件都对其热量回收利用率具有一定程度的影响。为进一步提升减压膜蒸馏热量回收效率的研究和降低运行成本工艺技术的开发奠定了基础。Vacuum membrane distillation technology has great potential applications in seawater desalina- tion, industrial wastewater treatment and so on. This study focused on heat recovery in vacuum membrane distillation process. An integrated membrane module with a three-step heat recovery system was designed and manufactured. The results indicate that this novel membrane module can effectively recover the vapor latent heat produced in membrane distillation. The operating conditions, such as feed inlet temperature, feed linear velocity and vacuum degrees, has a certain influence on heat recovery rate. This paper laid a foundation for further studies on improving heat recovery efficiency of decompression membrane distil- lation and reducing operating cost.

关 键 词：减压膜蒸馏 热量回收 换热器 中空纤维 

分 类 号：TQ021.2[化学工程]