热回收式板框膜蒸馏组件的制备及性能研究  

Preparation of plate-frame membrane distillation module with energy recovery and its desalination performance

作　　者：高云霄[1] 刘芮[1] 李保安[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《现代化工》2016年第11期163-166,168,共5页Modern Chemical Industry

基　　金：海洋局项目-区域经济创新示范项目(CXSF2014-34-C)

摘　　要：制备了一种新型的热回收式板框膜蒸馏组件,该组件主要由疏水性平板微孔膜和中空纤维换热丝构成,并对其负压辅助气隙式膜蒸馏过程进行了研究。重点考察了进料液温度、进料液流量和透过侧真空度等操作参数对膜组件膜通量、造水比及脱盐率等性能的影响。实验结果表明,膜通量随着进料液温度、进料液流量及真空度的升高而增大;造水比随进料温度和真空度的升高而增大,但随进料流量的加大而减小。在进料液温度为95℃、进料液流量为70 L/h、真空度为0.05 MPa时,膜通量和造水比最高可达33.0 kg/(m^2·h)和2.050,而脱盐率始终在99.98%以上,与传统膜蒸馏相比,造水比提高1倍以上,表现出了高通量下较好的热回收效果。A novel plate-frame membrane distillation （MD） module with energy recovery is designed and made exploratorily. This module is consisted of flat sheet membrane and hollow fiber heat exchangers （FSM-HFE）. Based on the novel membrane module, a series of AGMD experiments are conducted to investigate the effects of feed temperatures, feed flow rates and vacuum degrees on the water permeation flux （ Jw ）, water gain-output-ratio （GOR） and the salt rejection ratio （R）. The experiment results show that Jw is raised with the increase of three factors. GOR is also increased with the increase of the feed temperature and the vacuum degree, but decreased with the increase of the feed flow rate. When the feed condition is 95℃ ,70 L/h and 0. 05 MPa,the flux can be up to 33 kg/（m2·h） and the corresponding GOR is 2. 050. The salt rejection ratio is also more than 99. 98%. Compared with the traditional MD, the GOR is doubly increased, indicating the efficient energy recovery of the novel membrane module at high water permeation flux.

关 键 词：气隙式膜蒸馏 热量回收 板框膜组件 

分 类 号：TQ028.8[化学工程]