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Innovative seawater intake for reverse osmosis desalination plants

机译:反渗透海水淡化厂的创新海水摄入量

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Seawater desalination plants typically consist of four major unit operations: seawater intake, pretreatment, Reverse Osmosis (RO) stage, and posttreatment and brine discharge. The best way is to go through vertical beach wells, but the increase of the production capacity of the plants built in recent years makes open intake the only solution. These open ocean intakes draw seawater through the meshed intake screen and then convey the seawater to the desalination plant. The raw seawater then undergoes pretreatment, typically using either conventional or membrane pretreatment processes to prevent particle/colloidal fouling of Reverse Osmosis/Nanofiltration (RO/NF) membranes. Use of these pretreatment processes increases the capital cost of the facility and also escalates the operational costs, as these facilities require additional chemicals and energy. For these reasons, an alternative has arisen in recent years, namely horizontal boreholes. The present paper analyses this option and compares its performance in a real case study.
机译:海水淡化厂通常由四个主要部门组成:海水摄入,预处理,反渗透(RO)阶段以及后处理和盐水排放。最好的方法是穿过垂直的海滩井,但是近年来建造的工厂的生产能力的增加使得开放式进水成为唯一的解决方案。这些开放的海洋进水通过网状进水网将海水吸入,然后将海水输送到海水淡化厂。然后,通常使用常规或膜预处理工艺对原海水进行预处理,以防止反渗透/纳滤(RO / NF)膜的颗粒/胶体结垢。这些预处理过程的使用增加了设备的资本成本,并且还提高了运营成本,因为这些设备需要额外的化学药品和能源。由于这些原因,近年来出现了替代方案,即水平钻孔。本文分析此选项,并在实际案例研究中比较其性能。

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