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System and method for extracting pure water and concentrating and desalinating seawater

A pure water extraction and seawater technology, which is applied in the field of pure water extraction and concentrated desalination of seawater systems, can solve the problems of increasing system cost, easy pollution of homogeneous ion exchange membranes, and reducing membrane service life, etc., to achieve long operation time and efficient Conducive to effective comprehensive treatment and low production cost

Inactive Publication Date: 2020-01-10
山西云海川环保科技有限公司
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  • Claims
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Problems solved by technology

However, due to the high salt property of seawater, the homogeneous ion exchange membrane is prone to fouling, which will reduce the service life of the membrane and increase the cost of the system

Method used

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  • System and method for extracting pure water and concentrating and desalinating seawater

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0018] Such as figure 1 A system for extracting pure water and concentrating and desalinating seawater is shown, which includes a stock solution pump 1, an ultrafiltration device 2, a seawater pump 3, an electrodialysis device 4, a desalinated seawater pump 5, a desalinated seawater heater 6, and a desalinated seawater storage tank 7. Direct contact with the membrane distillation device 8, the cold water pump 9 and the pure water storage tank 10, wherein the stock solution pump 1 is provided with a raw seawater inlet, the ultrafiltration input port 2.1 of the ultrafiltration device 2 is connected to the outlet of the stock solution pump 1, and the ultrafiltration device The ultrafiltration output terminal 2.2 of 2 is connected to the electrodialysis input terminal 4.1 of the electrodialysis device 4 through the seawater pump 3, and the electrodi...

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Abstract

The invention discloses a system for extracting pure water and concentrating and desalinating seawater. The ultrafiltration input end of the ultrafiltration device of the system is connected with a stock solution pump, the ultrafiltration output end of the ultrafiltration device is connected with the electrodialysis input end of an electrodialysis device through a sea water pump, the electrodialysis output end of the electrodialysis device is connected with a desalted seawater storage tank, the outlet of the desalted seawater storage tank is connected with the inlet of a desalted seawater heater through a desalted seawater pump, the outlet of the desalted seawater heater is connected with the desalted seawater inlet of a direct-contact membrane distillation device, the desalted seawater outlet of the direct-contact membrane distillation device is connected with the desalted seawater circulating return inlet of the desalted seawater storage tank through a second water stop valve, the outlet of a pure water storage tank is connected with the input end of a cold water pump through a first water stop valve, the output end of the cold water pump is connected with the pure water inlet ofthe direct-contact membrane distillation device, and the pure water outlet of the direct-contact membrane distillation device is connected with the pure water storage tank. Seawater desalination, pure water extraction and membrane cleaning can be efficiently completed by the system in an energy-saving manner.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a system and method for extracting pure water and concentrating and desalinating seawater. Background technique [0002] With the development of society and economy, the earth's fresh water resources can no longer meet the requirements of social development, and desalination of seawater has become an important way for people to solve the crisis of fresh water resources. At present, the methods widely used in seawater desalination include membrane distillation, reverse osmosis, multi-stage flash evaporation and electrodialysis. Among them, the electrodialysis technology is a membrane separation technology that uses the potential difference as the driving force and uses the selective permeability of the ion exchange membrane to separate the salt of the charged component from the water of the non-charged component. With the increasing maturity of electrodialysis technology,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F103/08
CPCC02F1/001C02F1/447C02F1/4693C02F9/00C02F2103/08C02F2303/14
Inventor 蒋庭学贺清尧石明菲冯椋郑璇
Owner 山西云海川环保科技有限公司
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