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

A desalination system and reverse osmosis technology, applied in the field of seawater desalination, can solve the problems of high operating cost, low recovery rate, large energy consumption per ton of water, etc. Effect

Pending Publication Date: 2018-05-29
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 s...

Method used

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

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Embodiment 1

[0023] A reverse osmosis system for improving the recovery rate of seawater desalination, comprising: a primary desalination system 11 and a secondary desalination system 12, the primary desalination system comprising a primary reverse osmosis membrane front end 1 and a primary reverse osmosis membrane rear End 2, the concentrated water outlet at the front end of the primary reverse osmosis membrane is connected to the seawater inlet at the rear end of the primary reverse osmosis membrane through a high-pressure pipeline;

[0024] The two-stage desalination system includes two-stage reverse osmosis membrane A, part number: 3 and two-stage reverse osmosis membrane B, part number: 4, the seawater inlet of the two-stage reverse osmosis membrane A is the same as the first-stage The fresh water outlet at the front end of the reverse osmosis membrane is connected through a secondary high-pressure pump A, part number: 8, and the seawater inlet of the secondary reverse osmosis membrane...

Embodiment 2

[0026] According to the reverse osmosis system for improving the recovery rate of seawater desalination described in Example 1, the fresh water outlet of the secondary reverse osmosis membrane A and the outlet of the secondary reverse osmosis membrane B are respectively connected to the total water outlet 13 through the pipeline connect.

Embodiment 3

[0028] According to the reverse osmosis system for improving the recovery rate of seawater desalination described in embodiment 1 or 2, the concentrated water outlet at the rear end of the primary reverse osmosis membrane is connected to the concentrated water inlet of the energy recovery device 7 through a pipeline.

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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...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F103/08
CPCC02F1/441C02F2103/08C02F2301/08C02F2303/10Y02A20/131
Inventor 李崇超刘娜武莉莉曾庆才果志强梁鹏马原苏芳刘赞辉李建霖
Owner HARBIN BOILER
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