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A bipolar-membrane-based brine recycling system

A recovery system, bipolar membrane technology, applied in membrane, membrane technology, seawater treatment and other directions, can solve problems such as large scaling risks, and achieve the effect of reducing the increasing trend, reducing the scaling cycle, and inhibiting scaling

Active Publication Date: 2020-11-17
BGT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It reduces the possibility of scaling by removing some of the ions in the salty wastewater to soften the wastewater. It does not start from the ion exchange membrane itself, and the ion exchange membrane still has a large risk of scaling

Method used

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  • A bipolar-membrane-based brine recycling system
  • A bipolar-membrane-based brine recycling system
  • A bipolar-membrane-based brine recycling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The present invention provides a brine recovery system based on a bipolar membrane, which at least includes a bipolar membrane processing module 1 . The bipolar membrane treatment module is used to treat the aqueous solution entering it by electrodialysis to obtain acid solution, alkali solution and concentrated brine solution. The bipolar membrane treatment module includes at least one bipolar membrane electrodialyzer. figure 2 A preferred structural schematic diagram of a bipolar membrane electrodialyzer is shown, as figure 2 As shown, the bipolar membrane electrodialyzer at least includes a pole frame 103, an anode 104, a cathode 105, at least three bipolar membranes 106, at least one anion exchange membrane 107 and at least one cation exchange membrane 108, wherein the positive pole and the negative pole are in accordance with each other The opposite way is fixed on the left end portion and the right end portion of the pole frame. On the side close to the anode,...

Embodiment 2

[0077] This embodiment is a further improvement on Embodiment 1, and repeated content will not be repeated here.

[0078] Such as image 3 As shown, the second intermediate pool only has one chamber, and a water quality monitor 12 is also arranged in the second intermediate pool, wherein the water quality monitor can include a first ion detector for monitoring the concentration of chlorine ions, and a first ion detector for monitoring the concentration of heavy metals. The second ion detector for ion concentration and the tiny particle detector for monitoring the content of colloid and suspended solids. The first circulation path and the second circulation path perform circulation processing again. The preset standard of the water quality monitor can be formulated according to the actual situation. For example, when the fluid in the second intermediate tank is used for industrial water or irrigation water, its metal ion concentration, suspended solids content and chloride ion...

Embodiment 3

[0082] This embodiment is a further improvement on the foregoing embodiments, and repeated content will not be repeated here.

[0083] Such as Figure 4 and Figure 5 As shown, the present invention provides a bipolar membrane-based brine recovery system, which is equipped with the bipolar membrane treatment module and the electrodialysis treatment module in the foregoing embodiments, wherein the brine recovery system also includes a water softening module 15, an oxidation treatment module 16. The pretreatment module 17 and the dosing module 18, wherein the water softening module is used to soften the fluid, and the oxidation treatment module is used to oxidize the softened wastewater to eliminate harmful microorganisms such as bacteria in the wastewater. The pretreatment module preliminarily concentrates the wastewater in the way of reverse osmosis treatment to obtain wastewater treatment liquid with a certain concentration of salt.

[0084] Preferably, the water softening ...

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Abstract

A bipolar-membrane-based brine recycling system comprises a first compartment (109), a second compartment (110) and a third compartment (111), wherein the inlet water circulates, in the form of electrode solution, in a third circling path (8) defined by the first compartment (109), the anode compartment (203) of the primary electrodialyzer (201) and the first intermediate pool (3), and in a fourthcircling path (9) defined by the second compartment (110), the cathode compartment and the first intermediate pool (3) respectively, wherein the first compartment (109) is configured into the work mode in which the fluid treated thereby neutralizes the acidic fluid yielded by the treatment of the anode compartment (203) in the third circling path (8), and the second compartment (110) is configured into the work mode in which the fluid treated thereby neutralizes the alkaline fluid yielded by the treatment of the cathode compartment (202) in the fourth circling path (9).

Description

technical field [0001] The invention belongs to the technical field of waste water treatment devices, in particular to a brine recovery system based on bipolar membranes. Background technique [0002] Bipolar membrane is a kind of ion exchange membrane with special function. Under the action of electric field, water dissociation occurs in the middle layer to generate H + and OH - ion. The bipolar membrane electrodialysis technology is to combine this special function into ordinary electrodialysis, so that it can realize the production / regeneration of acid / alkali in real time, or acidification and / or alkalization. This technology has been applied in inorganic processes, such as from NaCl, Na 2 SO 4 , KF, KNO 3 , NH 4 SO 4 Prepare corresponding acids and bases from salt solution or waste solution. Bipolar membrane electrodialysis technology is a kind of electrodialysis technology. In the process of preparing acid or alkali by electrolysis of aqueous solution containing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/42C02F1/469C02F9/06
CPCB01D65/08B01D61/445C02F2303/22C02F2301/08C02F2103/08C02F1/4693C02F2201/46115C02F1/78C02F1/441C02F1/444B01D2311/252
Inventor 权秋红张建飞元西方赵庆
Owner BGT GRP CO LTD
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