真空膜蒸馏过程CFD模拟及膜组件设计  

CFD simulation of vacuum membrane distillation process and design of membrane module

作　　者：唐娜 刘天宇[1,2] 华欣欣 张蕾 程鹏高[1,2] 贾斌斌 项军[1,2] TANG Na;LIU Tianyu;HUA Xinxin;ZHANG Lei;CHENG Penggao;JIA Binbin;XIANG Jun(College of Chemical Engneering and Material, Tianjin University of Science & Technology, Tianjin 300457, China;Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science & Technology, Tianjin 300457, China)

机构地区：[1]天津科技大学化工与材料学院,天津300457 [2]天津科技大学天津市海洋资源与化学重点实验室,天津300457

出　　处：《膜科学与技术》2020年第2期97-105,126,共10页Membrane Science and Technology

基　　金：天津市自然科学基金(18JCZDJC37200);天津科学大学校青年创新基金(2014CXLG11);天津市海洋资源与化学重点实验室项目(201404);教育部创新团队发展计划项目(IRT-17R81)。

摘　　要：利用计算流体力学模拟软件对真空膜蒸馏过程进行模拟计算.通过自行编写UDF对实验结果进行验证,模拟结果表明,在不同进料温度、进料流量以及渗透侧真空度的影响下,模拟值与实验值均高度吻合,编写的UDF可用于膜组件放大化模拟.对平板真空膜蒸馏组件进行放大设计后模拟发现,当有效过滤面积为0.25 m^2时,平板膜组件最佳长宽比为1∶2,组件内通道高度为7.5 mm,此时渗透通量为6.08 kg/(m^2·h);通过在组件内部增加隔板以加快料液互相渗透,模拟结果表明,隔板最佳高度为3 mm,隔板间距为40 mm,优化后的膜组件渗透通量达到了6.53 kg/(m^2·h),相比初始膜组件提高了10.3%.The vacuum membrane distillation process was simulated by computational fluid dynamics simulation software.The simulation results show that the simulation values are in good agreement with the experimental values under the influence of different feeding temperature,feeding flow rate or permeation side vacuum.The UDF can be used to magnify the simulation of membrane module.After enlarging the design of the plate vacuum membrane distillation module,the simulation results show that when the effective filter area is 0.25 m^2,the optimal length-width ratio of the plate membrane module is 1∶2 and the channel height is 7.5 mm,the permeation flux can be reached 6.08 kg/(m^2·h).The simulation results show that the material-liquid permeation can be accelerated by adding a baffle inside the module.The optimum height of the plate is 3 mm and the distance between the diaphragms is 40 mm.The permeation flux of the optimized membrane module reaches 6.53 kg/(m^2·h),which is 10.3%higher than that of the initial membrane module.

关 键 词：CFD模拟 真空膜蒸馏 膜组件 渗透通量 

分 类 号：TQ028.8[化学工程]