Reverse osmosis system capable of increasing seawater desalination recovery rate and recovery method

Abstract

The invention discloses a reverse osmosis system capable of increasing the seawater desalination recovery rate and a recovery method. The water inflow is often increased to guarantee certain producedwater volume with traditional seawater reverse osmosis methods, which results in large pretreated water volume, high flow of a water inlet high-pressure pump, high system energy consumption and high operation cost. The reverse osmosis system comprises a primary desalination system (11) and a secondary desalinization system (12), wherein the primary desalination system comprises a primary reverse osmosis membrane front end (1) and a primary reverse osmosis membrane back end (2), and a concentrated water outlet of the primary reverse osmosis membrane front end and a seawater inlet of the primaryreverse osmosis membrane back end are connected through a high-pressure pipeline.

Description

Technical field: [0001] The invention relates to a reverse osmosis system and a recovery method for improving the recovery rate of seawater desalination, belonging to the field of seawater desalination. Background technique: [0002] The traditional seawater reverse osmosis method is to desalinate part of the seawater into fresh water through the first-stage seawater reverse osmosis composed of a group of membrane stacks after the seawater passes through the pretreatment system, and all the fresh water enters the second-stage freshwater reverse osmosis, and the concentrated water is discharged. The factors that affect the recovery rate of the seawater reverse osmosis system include temperature, influent seawater quality, feedwater pressure of the reverse osmosis high-pressure pump, as well as the influent flow rate and the performance of the reverse osmosis membrane. When the channel flows upwards and the water quality of different sections is constant, it is often necessary...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low recovery rate of traditional seawater desalination reverse osmosis membrane, large energy consumption per ton of water, and high operating cost, and provide a method to reduce the influent flow rate and improve the efficiency of the entire seawater reverse osmosis system under the same water production. The recovery rate reduces the scale of pretreatment, reduces the system's energy consumption per ton of water and operating costs, and improves the economy. A reverse osmosis system and recovery method that improves the recovery rate of seawater desalination

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