High-power coupling concentration device

A concentration device and high-power technology, applied in the field of water treatment, to ensure the effect of accuracy and repeatability

Pending Publication Date: 2021-04-02
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the desalination of medium- and low-concentration feed liquid, concentration has higher requirements on the mass transfer characteristic parameters of the membrane, especially the concentration of acid has higher requirements on the membrane than the concentration of ordinary salt, which is difficult for general heterogeneous ion exchange membranes to achieve. Require

Method used

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  • High-power coupling concentration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Appendfigure 1The structure shown, a high-magnifying concentrate, including a positive permeable component, a homogeneous membrane electrodialysis component, a reverse osmosis component, wherein the imported permeable component is connected to the stock output, and is divided into two exits after the positive infiltration member. All the way concentrate discharge system, the second plungeon salt export is invested with an incoming film electrodialysis component; the exit of the homogeneous membrane electrodialysis components is divided into two channels, the first stream of concentrated salt water exit and the import of positive permeable components, The exit of the secondary light salt and the inlet connection of reverse osmosis components; the export of reverse osmosis is divided into two channels, the first concentrated exit of the first circuit is connected to the import of the electrodalastic diaryllation parts, and the export of the second fresh water is discharged. use....

Embodiment 2

[0036]Similarly to Example 1, the positive permeation member is a hollow fiber positive permeable membrane prepared by poly acetate, and the diameter of the positive permeable hollow fibers is 0.8 mm, the interval is 99.5%, and the film flux is 1 liter / square meter. Hour . The concentration of the concentration of the concentration to be concentrated into the positive penetration was 2%, and the solution solution solution solution solution solution was 20%.

[0037]High-dimensional concentrated homogeneous membrane electrodialysis components use high-magnified electrodialysis apparatus electrodialysis apparatus. The ionic selectivity of the octopoelectric exchange membrane used 99.3%, the film resistance is 5 Eurome, and the sodium chloride solution can be concentrated to 20%, and the current efficiency can reach 90%.

[0038]The retention rate of the reverse osmosis component is 99.5%, and the film flux is 25 liters per square meter.

[0039]The concentration of 2% to be concentrated and ...

Embodiment 3

[0042]Similarly to Example 1, the positive permeation member is a hollow fiber positive permeable membrane prepared by poly acetate, and the diameter of the positive permeable hollow fibers is 1.5 mm, the retention rate is 99.5%, and the film flux is 3 liters per square meter. Hours . The concentration of concentration of concentration to be concentrated to be concentrated in positive penetration was 5%, and the concentration of a solution of a high solution sodium chloride solution was 20%.

[0043]High-dimensional concentrated homogeneous membrane electrodialysis components use high-magnified electrodialysis apparatus electrodialysis apparatus. The ionic selectivity of the yin and cation exchange membrane used 99.5%, the membrane resistance is 5 Eurome / square centimeter, and the sodium chloride solution can be concentrated to 20%, and the current efficiency can reach 95%.

[0044]The retention rate of the reverse osmosis component was 99.6%, and the film flux was 20 liters per square ...

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a high-power coupling concentration device. The high-power coupling concentration device comprises a forward osmosis component, a homogeneous membrane electrodialysis component and a reverse osmosis component, and is characterized in that an inlet of the forward osmosis component is connected with a stocksolution output port divided into two outlets through the forward osmosis component, and a first-path concentrated solution discharge system and a second-path dilute brine outlet are connected with aninlet of the homogeneous membrane electrodialysis component; an outlet of the homogeneous membrane electrodialysis component is divided into two paths, a first-path strong brine outlet is connected with the inlet of the forward osmosis component, and a second-path light brine outlet is connected with an inlet of the reverse osmosis component; and the reverse osmosis outlet is divided into two paths, a first-path concentrated solution outlet is connected with the inlet of the homogeneous membrane electrodialysis component, and a second-path fresh water outlet is discharged out of the system and recycled. The device has the advantages that the risks of scaling, deterioration and the like caused by high temperature, high pressure, electric field and the like in the concentration process aresolved, and long-term stable, economical and reliable operation can be realized.

Description

Technical field[0001]The present invention belongs to the technical field of water treatment, and more particularly to a high-permeate + electrodialysis + reverse osmosis high-magnifying concentrate.Background technique[0002]In positive infiltration, the driving force for separation is mainly the osmotic pressure difference between the drawing liquid and the raw material liquid on both sides of the FO film, and the water is spontaneously transmitted from the raw material liquid (lower permeability pressure). High permeability pressure). Unlike traditional pressure-driven film separation techniques, such as microfiltration, ultrafiltration, nanofiltration and reverse osmosis, etc., is penetrating because of the different principles of operation, there is a unique advantage, such as applied lower or no pressure, Leading lower energy consumption, reducing operating costs; strong separation ability is strong, there is a high interweepole with contaminants; positive penetration pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/441C02F1/445C02F1/4693C02F9/00Y02A20/131
Inventor 俞海英金水玉胡鉴耿付晓靖金可勇
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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