A system for recovering reverse osmosis concentrated water to produce desalted water
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A technology of reverse osmosis concentrated water and reverse osmosis device, which is applied in the field of water treatment, can solve the problems of pollution, waste, and low recovery rate of reverse osmosis concentrated water, and achieves good economic benefits, easy operation, and high recovery rate of concentrated water. Effect
Active Publication Date: 2016-08-24
海丝节水科技(天津)有限公司
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[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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Embodiment 1
[0017] Taking the reverse osmosis concentrated water produced by boiler water preparation in a thermal power plant as the research object, according to figure 1 The process shown is to recover reverse osmosis concentrated water to prepare demineralized water. The technical route of reverse osmosis electrodialysis-two-stage reverse osmosis-EDI is adopted. The conductivity of reverse osmosis concentrated water is about 3700μS / cm. After the desalination treatment of the electrodialysis device, the conductivity of the electrodialysis product water drops to about 1000μS / cm, which meets the water quality requirements of reverse osmosis. After the desalination treatment of the electrodialysis product water, the conductivity drops to about 5μS / cm, after the deep desalination treatment of the reverse osmosis water by the EDI device, the conductivity of the produced desalted water is reduced to about 0.2μS / cm, which meets the requirements of boiler water. Using this process, the company...
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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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