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A Salt Wastewater Treatment System Inhibiting Scaling

A technology for saline wastewater and treatment systems, applied in multi-stage water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as large scaling risks, achieve inhibition or elimination of scaling, and increase exposure The effect of surface and high concentration treatment efficiency

Active Publication Date: 2021-08-24
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 Salt Wastewater Treatment System Inhibiting Scaling
  • A Salt Wastewater Treatment System Inhibiting Scaling
  • A Salt Wastewater Treatment System Inhibiting Scaling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 A schematic diagram of the modular structure of the saline wastewater treatment system of the present invention is shown. Such as figure 1 As shown, the wastewater treatment system of the present invention at least includes a wastewater softening unit 1 , a wastewater reduction unit 2 , an electrodialysis unit 3 , a tubular microfiltration unit 4 and a dosing unit 5 .

[0046] The wastewater softening unit 1 at least includes a homogeneous water tank 101, a coagulation tank 102, a flocculation tank 103, a sedimentation tank 104, a first filter 105 and a first intermediate tank 106, wherein the waste water is in the homogeneous water tank 101, the coagulation tank 102, The transfer flow between the flocculation tank 103 and the sedimentation tank 104 can provide transfer driving force through several lift pumps. The homogeneous water tank 101 is used to improve the uneven distribution of dispersed substances in the waste water, which can make the waste water g...

Embodiment 2

[0058] This embodiment is a further improvement on Embodiment 1, and repeated content will not be repeated here.

[0059] figure 2 with image 3 Two different modes of operation of the electrodialyzer are shown. Such as figure 2 with image 3As shown, the electrodialyzer 301 has a cathode 305 and an anode 306 corresponding to each other, wherein the anode is arranged at the left end of the casing 309, and the cathode is arranged at the right end of the casing. Two anion exchange membranes and two cation exchange membranes arranged alternately at intervals are arranged between the cathode and the anode. In the direction extending from the anode to the cathode, there are cation exchange membranes, anion exchange membranes, cation exchange membranes, and anion exchange membranes in sequence, so that two concentrated waters that are mirror-symmetrical to the fresh water chamber 308 are defined by the anion exchange membranes and the cation exchange membranes Room 307.

[0...

Embodiment 3

[0072] This embodiment is a further improvement on Embodiment 1 and Embodiment 2, and repeated content will not be repeated here.

[0073] Figure 4 It shows another preferred treatment process of saline wastewater in the present invention. Such as Figure 4 As shown, for the convenience of description, a fresh water chamber and a concentrated water chamber defined by one first ion exchange membrane and two second ion exchange membranes are defined as a membrane stack unit 6 . N membrane stack units can be set between the cathode and anode of the electrodialyzer as required, where N≥1.

[0074] Preferably, the electrodialysis unit further includes a first booster pump 601, a second booster pump 602, a first reversing valve 603, a second reversing valve 604, N membrane stack units 6, a first exchange tube 605 and a second reversing valve Two exchange tubes 606 . The second intermediate water tank can communicate with the first exchange pipe and the second exchange pipe resp...

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PUM

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Abstract

A system for treating salty wastewater that inhibits scaling, at least including a wastewater reduction unit and an electrodialysis unit, the wastewater reduction unit is used to obtain a first concentration of concentrated salt solution and a second concentration of concentrated salt with different salt contents The electrodialysis unit is configured such that: the concentrated salt solution of the first concentration and the concentrated salt solution of the second concentration enter several concentrated water chambers and fresh water chambers respectively in a manner with a pressure difference, wherein the ion exchange membrane can be moved along based on the pressure difference The first direction parallel to the line connecting the cathode and the anode is shifted by a first distance to form a first working configuration, and the ion exchange membrane can also be shifted by the first distance in a second direction parallel to the line connecting the cathode and the anode based on a change in pressure difference. Two distances are used to form the second working mode. When the conductivity of the concentrated water chamber and / or the conductivity of the fresh water chamber is higher than a certain threshold, the switch between the first working mode and the second working mode is realized. The invention can dynamically change the form of the ion-exchange membrane, and can effectively suppress the generation of fouling.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment system for inhibiting fouling of salty wastewater. Background technique [0002] Liquid desalination technologies have been widely industrialized, including ion exchange technology, reverse osmosis technology and electrical desalination technology. Electrodialysis technology is an earlier and more mature electric desalination technology, which was first industrialized abroad in the early 20th century. On this basis, a new type of electric desalination technology has been developed by organically combining electrodialysis and ion exchange technology. [0003] At present, various electric desalination technologies have been widely used in brackish water desalination, seawater desalination, industrial water treatment to produce primary pure water, and also in the desalination of organic materials such as: xylitol desalination, whey desalination,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
CPCC02F1/441C02F1/444C02F1/4693C02F1/52C02F5/00C02F9/00C02F2301/08
Inventor 权秋红何秉华石维平刘富伟
Owner BGT GRP CO LTD