Method and device of desalination process by reverse osmosis for water

A treatment method and treatment device technology, applied in seawater treatment, osmosis/dialysis water/sewage treatment, general water supply conservation, etc., can solve the problems of system operation complexity, complex structure of moving parts, low energy recovery efficiency, etc., to achieve Simple structure, simple and convenient operation, reliable operation

Inactive Publication Date: 2007-12-26
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

The main moving parts of the first two devices have complex structures and low energy recovery efficiency
The latter generally has low single-machine processing capacity, and requires special valves to be used in the system, resulting in the complexity of system operation.

Method used

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  • Method and device of desalination process by reverse osmosis for water
  • Method and device of desalination process by reverse osmosis for water
  • Method and device of desalination process by reverse osmosis for water

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] As shown in Figure 1, a water reverse osmosis desalination treatment method, in which the pretreated seawater / brackish water flow A enters the boost chamber V1 of the energy recovery pump 1 from the inlet a, when the rotor 2 and the blade 3 are driven by the motor 12 When driven to rotate clockwise, the working volume of the sealed booster chamber V1 changes, seawater / brackish water flows out from outlet b after the pressure is increased, and the pressurized high-pressure seawater / brackish water flow B enters the reverse osmosis membrane module 4 to transfer fresh water Separation, the product water flow C is produced, and the remaining high-pressure brine flow D flows from the inlet c into the energy recovery chamber V2 of the energy recovery pump 1 through the back pressure valve 5. In the energy recovery chamber V2, the press...

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Abstract

This invention discloses apparatus and method for reverse osmosis desalination treatment of water with high efficiency in recovering energy. The method comprises: sending pre-treated seawater / brackish water flow A into the pressure chamber of the pump chamber of an energy recovery pump cylinder, rotating rotor and blades by motor, raising the pressure of outflow seawater / brackish water flow B, sending into a reverse osmosis module, performing liquid membrane separation to produce water flow C, sending the residual high-pressure concentrated salt water flow D into a recovery chamber of the same pump chamber of the energy recovery pump cylinder for energy recovery, rotating motor by blades for doing work, and discharging low-pressure concentrated salt water flow E after doing work. This invention has such advantages as high water treatment ability, easy operation, simple apparatus structure, stable operation and low cost.

Description

technical field [0001] The invention relates to a water treatment method and device, in particular to a water reverse osmosis desalination treatment method and device. Background technique [0002] Reverse osmosis is a liquid membrane separation process driven by pressure difference, that is, a pressure-driven membrane process. Seawater or brackish water is separated from freshwater by using the characteristics of reverse osmosis membrane under the action of a high-pressure pump. The separated freshwater flows out in the form of permeate, and the remaining concentrated seawater and bitter brine are discharged. Therefore, it is very important to efficiently recover the residual pressure of high-pressure reverse osmosis concentrated water and reduce energy consumption and desalinated water costs. [0003] At present, the residual pressure recovery devices mainly include hydraulic recovery turbines, hydraulic turbochargers and positive displacement pressure energy recovery dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F103/08
CPCY02A20/131
Inventor 卢勇束鹏程李连生卜高选李宪
Owner XI AN JIAOTONG UNIV
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