A system for recovering reverse osmosis concentrated water to produce desalted water

Abstract

The invention discloses a system for preparing demineralized water by recycling reverse osmosis concentrated water and belongs to the technical field of water treatment. The system comprises a reverse osmosis concentrated water tank, a booster pump, an ultrafilter, an electrodialysis water inlet tank, an electrodialysis reversal device, a primary water inlet tank, a dosing system, a primary high-pressure pump, a primary security filter, a primary reverse osmosis device or nanofiltration device, a secondary water inlet tank, a secondary high-pressure pump, a secondary security filter, a secondary reverse osmosis device or nanofiltration device, an EDI or ion exchange mixed bed water inlet tank, an EDI device or ion exchange mixed bed device, and a demineralized water tank. The system has the advantages of being simple in structure, easy to operate, high in concentrated water recycling rate, low in operating cost, long in service life, high in economic efficiency and the like. The system can be matched with water treatment equipment such as a sea water desalination device and a boiler water device, and is efficient, easy to use, capable of being used for a long time and high in reliability and innovativeness.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a system for recovering reverse osmosis concentrated water to prepare demineralized water. Background technique [0002] With the development of science and technology and people's attention to the water treatment industry, the relevant processes and equipment of the water treatment industry have achieved considerable development in recent years. Reverse osmosis membrane separation technology is a main method of water treatment. It has the incomparable advantages of other traditional technologies such as cost-effective, simple operation, and easy automation. It is widely used in the fields of seawater desalination, wastewater treatment and boiler water. [0003] At present, the recovery rate of the reverse osmosis device is between 45% and 80%. Therefore, a large amount of concentrated water will be generated during the separation process of the reverse osmosis membrane. If the rem...

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Problems solved by technology

[0005] Aiming at the problems and deficiencies existing in the existing reverse osmosis concentrated water reuse and treatment process, the invention solves the pollution and waste problems caused by the low recycling rate of reverse osmosis concentrated water and direct discharge

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