Novel Variable Configuration Design for Ultrahigh Recovery Reverse Osmosis Desalination of Brackish Water,Industrial & Engineering Chemistry Research

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Novel Variable Configuration Design for Ultrahigh Recovery Reverse Osmosis Desalination of Brackish Water
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-03-22 , DOI: 10.1021/acs.iecr.3c04406
Mingheng Li ₁ , Joseph Li ₂

Affiliation

A novel transient and cyclic design is proposed for ultrahigh recovery reverse osmosis (RO) desalination of brackish water. The designed system consists of two subsystems, a conventional multistage RO and a flow reversal and retentate recycle RO. The operation periodically switches between two different configurations, a series connection of the two subsystems for full production, and a parallel connection for partial production and flushing of the most concentrated membranes using the under-saturated fresh feed. Such a transient and cyclic design concept incorporates beneficial features of ROTEC’s flow reversal RO (FRRO) and DuPont/Desalitech’s closed-circuit RO (CCRO) in a single system. It offers operational flexibility at ultrahigh recoveries and requires a slight hardware modification to retrofit existing brackish water RO plants. Dynamic simulations show that concentration hotspots and overshoots are less severe than those in FRRO. It also avoids cycle-to-cycle salt buildups that are inevitable in CCRO given that it is an open-circuit design.

中文翻译：

苦咸水超高回收率反渗透淡化的新型可变配置设计

提出了一种新颖的瞬态和循环设计，用于苦咸水的超高回收率反渗透（RO）淡化。设计的系统由两个子系统组成，一个是传统的多级反渗透，另一个是逆流和滞留物循环反渗透。该操作定期在两种不同的配置之间切换，两个子系统的串联连接用于全面生产，以及并联连接用于部分生产和使用不饱和的新鲜进料冲洗最浓缩的膜。这种瞬态和循环设计概念将 ROTEC 的逆流反渗透 (FRRO) 和杜邦/Desalitech 的闭路反渗透 (CCRO) 的有益特性融入到单个系统中。它在超高回收率下提供了操作灵活性，并且需要稍微修改硬件来改造现有的苦咸水反渗透装置。动态模拟表明，浓度热点和超调没有 FRRO 中的严重。它还避免了 CCRO 中不可避免的循环间盐积聚，因为它是开路设计。

更新日期：2024-03-22

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