反渗透系统的2m/s流速管道与径流方向模拟分析  

Modeling analysis of pipeline and runoff flow direction in reverse osmosis system at flow rate of 2m/s

作　　者：汪艳宁[1,2] 张智超[1,2] 苑宏英[1,2] 靖大为[1,2] WANG Yanning ZHANG Zhichao YUAN Hongying JING Dawei(School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin 300384, China)

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384

出　　处：《膜科学与技术》2016年第6期19-24,共6页Membrane Science and Technology

摘　　要：以反映管道压降的系统模拟软件为工具,以特定基准系统参数及2m/s管道流速为基础,分析了各种径流方向组合的反渗透系统运行工况,提出了全壳产水量与全壳错流比两个分别表征各壳元件污染速度与清污力度的运行指标,证明了各壳元件产水量失衡是其污染失衡的主要原因,明确了目前工程中常用的2m/s流速管道系统中底层膜壳污染最重.On the basis of particular reference parameters and the flow velocity of 2 m/s, the operational conditions of reverse osmosis （RO） system under different runoff directions were analyzed by using the simulation software which can reflect the pipeline pressure drop. Two operating parameters of water yield and cross flow ratio in a whole membrane shell were proposed to characterize the fouling rate and defouling intensity for each membrane shell, respectively. It is found that non-uniform fouling distribution in each membrane shell was mainly attributed to unbalance water yield. Moreover, the results showed that the membranes at the bottom membrane shells suffered from relative severe fouling during the current applications of RO systems with the flow rate of 2 m/s.

关 键 词：反渗透系统 管道压降 径流方向 污染分布 

分 类 号：TQ028.8[化学工程]