摘要
采用聚偏氟乙烯(PVDF)中空纤维膜组件,对比研究稳定流气扫式膜蒸馏(SSGMD)、脉冲流气扫式膜蒸馏(PSGMD)、鼓气流气扫式膜蒸馏(GSGMD)、鼓气流和脉冲流结合式(P&G SGMD)4种膜蒸馏模式,以膜的渗透性能、膜污染状况、热效率为指标,判断4种模式的优越性.研究了SSGMD膜蒸馏过程中进料温度(T_(f-in))和进料流量(Q_f)对膜通量(J)的影响,选择了最佳的条件,对比4种膜蒸馏方法在膜蒸馏过程中膜的渗透性能、膜表面污染情况、热效率.结果表明,采用SSGMD工艺,J随Q_f、T_(f-in)的增大而增大;在4种膜蒸馏过程中,GSGMD过程中膜通量相对最大、热效率最高(49.21%)、膜的污染最小.
PVDF hollow fiber membrane module was used to investigate the effect of steady flow（SSGMD）,pulse flow（PSGMD）,gas-liquid two-phase flow（GSGMD）and pulse flow gas-liquid twophase flow（PG SGMD）on the performance of sweeping gas membrane distillation（SGMD）process with seawater as the feed.The SSGMD process was applied to membrane distillation,the effect of feed temperature（Tf-in）and feed flowrate（Qf）operation parameters on the membrane flux（J）.The impact of different optimization methods on permeate flux,membrane fouling,thermal efficiency were studied individually.The results show that the membrane flux increases with the increase of feed temperature and feed flowrate on the SSGMD.Results of strengthening contrast experiments indicated that the optimal flux enhancement effect could be the GSGMD,its thermal efficiency was 49.21%,membrane has the least fouling.
作者
张大帅
李晨
张小朋
吴迪
熊玉琴
林强
史载锋
ZHANG Dashuai;LI Chen;ZHANG Xiaopeng;WU Di;XIONG Yuqin;LIN Qiang;SHI Zaifeng(Key Laboratory of Water Pollution Treatment ＆ Resource Reuse,College of Chemistry and Chemical Engineering,Hainan Normal University,Haikou 571158,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2018年第3期91-96,109,共7页
Membrane Science and Technology
基金
国家自然科学基金青年基金项目(21601043)
海南省重点研发计划项目(ZDYF2017011)
海南省重大科技计划项目(ZDKJ2016022)
海南省自然科学基金(217100,217101)
关键词
脉冲流
鼓气流
气扫式膜蒸馏
通量强化比
热效率
pulsatile flow
gas liquid
SGMD
flux enhancement ratio
thermal efficiency
