Reverse osmosis concentrated water recycling method and system

A technology of reverse osmosis concentrated water and permeate water, applied in the direction of permeation/dialysis water/sewage treatment, etc., can solve the problems of direct discharge of reverse osmosis concentrated water, energy waste, etc.

Active Publication Date: 2019-09-06
WUHU TUNGHSU PHOTOELECTRIC SCI & TECHCO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] An object of the present invention is to provide a method for recycling reverse osmosis concentrated water, which can solve the problems of direct discharge of reverse osmosis concentrated water and energy waste in the water treatment process

Method used

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  • Reverse osmosis concentrated water recycling method and system
  • Reverse osmosis concentrated water recycling method and system
  • Reverse osmosis concentrated water recycling method and system

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Embodiment approach

[0031] In the water treatment process flow, the water in the tap water pool 10 is filtered by the ultrafiltration device 20 to obtain ultrafiltered water, the ultrafiltered water is softened to obtain softened water, and the softened water is treated by the reverse osmosis device 30 to obtain permeated water and reverse Infiltrate the concentrated water, the permeated water is then sterilized, membrane filtered, continuous electric desalination and other steps to obtain terminal water, and collected in the terminal water tank 40, and the reverse osmosis concentrated water obtained after being treated by the reverse osmosis device 30 is directly discharged into the sewer will result in a waste of energy. Such as figure 1 As shown, as an exemplary embodiment of the present invention, a method for recycling concentrated reverse osmosis water is provided, the method comprising: mixing reverse osmosis concentrated water and ultrafiltration water to obtain backwash water, using the ...

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Abstract

The invention discloses a method and a system for recycling reverse osmosis concentrated water. Tap water is filtered by an ultrafiltration device (20) to obtain ultra-filtered water, the ultra-filtered water is subjected to a softening process to obtain softened water, and the softened water is treated by a reverse osmosis device (30) to obtain osmotic water and reverse osmosis concentrated water. The method comprises the steps of mixing the reverse osmosis concentrated water and the ultra-filtered water to obtain back washing water and performing back washing on the ultrafiltration device (20) with the back washing water. By adoption of the technical scheme, the reverse osmosis concentrated water and the ultra-filtered water are mixed for back washing of the ultrafiltration device, so that on the premise of guaranteeing the back washing effect on the ultrafiltration device, the reverse osmosis concentrated water is recycled and waste of water resources is avoided.

Description

technical field [0001] The invention relates to the field of water treatment technology, in particular to a method and system for recycling concentrated reverse osmosis water. Background technique [0002] Reverse osmosis, also known as reverse osmosis, is a membrane separation operation that uses pressure difference as the driving force to separate the solvent from the solution. The low-pressure side of the reverse osmosis device gets permeated water, and the high-pressure side gets reverse osmosis concentrated water. Taking the first-stage reverse osmosis as an example, the water production rate of the first-stage reverse osmosis is 75%, and 25% of concentrated water is produced during operation. The reverse osmosis concentrated water is water concentrated with various ions, and its salt content is relatively high. , For example, the softened water obtained after the softening process has a salt content of 500mg / L, the recovery rate of reverse osmosis concentrated water is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/44
Inventor 李青张大龙李兆廷石志强李震李赫然李俊生田海峰解光辉孙庆春
Owner WUHU TUNGHSU PHOTOELECTRIC SCI & TECHCO
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