真空膜蒸馏技术淡化盐碱水试验研究  

Experimental research on treatment of saline-alkali water by vacuum membrane distillation

作　　者：王闪 叶文升 胡雪菲[1,2] 尤永军 WANG Shan;YE Wensheng;HU Xuefei;YOU Yongjun(College of Water Resources and Architecture Engineering,Tarim University,Alar,Xinjiang 843300;Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region.Alar,Xinjiang 843300)

机构地区：[1]塔里木大学水利与建筑工程学院,新疆阿拉尔843300 [2]新疆维吾尔自治区教育厅普通高等学校现代农业工程重点试验室,新疆阿拉尔843300

出　　处：《塔里木大学学报》2022年第2期90-95,共6页Journal of Tarim University

基　　金：塔里木大学校长基金青年项目“减压膜蒸馏膜污染抑制效果的研究”(TDZKQN201829);塔里木大学校长基金创新研究团队项目“南疆劣质水资源安全处理与灌溉创新研究团队”(TDZKCQ202002)。

摘　　要：为探究真空膜蒸馏(VMD)技术淡化盐碱水工艺特性,为南疆盐碱水处理提供新思路,采用真空膜蒸馏小试,以农田排水为处理对象,考察不同温度(40℃、50℃、60℃)、不同冷侧真空度(0.025 MPa、0.052 MPa、0.070 MPa)和不同盐碱水浓度(5.30 g/L、7.00 g/L、9.60 g/L)对脱盐率与膜通量的影响。试验结果表明:各种不同操作条件下,VMD系统产水电导率均低于30μS/cm,脱盐率接近100%,说明操作条件对VMD系统脱盐率的影响不大;单因素试验结合多元线性拟合的结果发现,热侧温度、冷侧真空度与膜通量呈正相关,冷侧真空度的变化对膜通量的影响最大,温度次之,盐碱水浓度对膜通量的影响较小。In order to study the process characteristics of vacuum membrane distillation(VMD) technology on desalination of saline-alkali water, and provide new ideas for the treatment of saline-alkali water in southern Xinjiang. A bench-scale vacuum membrane distillation device was used to desalinate saline-alkali water from agricultural drainage. The different operations, including temperature(40 ℃, 50 ℃, and 60 ℃), vacuum(0.025 MPa, 0.052 MPa, and 0.070 MPa), and concentration of saline-alkali water(5.30 g/L, 7.00 g/L, and 9.60 g/L), were examined on the desalination rate and membrane flux. Under different operating conditions,the conductivity of water production from the VMD system was below 30 μS/cm, and the desalination rate was close to 100%, indicating that operating conditions had little effect on the desalination rate of VMD system. Single factor experiment combined with multiple linear fitting revealed that the temperature on the hot side and the vacuum degree on the cold side were positively correlated with the membrane flux, and the change of vacuum on the cold side had the greatest influence on the membrane flux, followed by temperature;however, saline-alkali water concentration had little influence on the membrane flux.

关 键 词：真空膜蒸馏 盐碱水 膜通量 脱盐率 

分 类 号：X703.1[环境科学与工程—环境工程]