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Method for preparing soft water by electro-deionization and device thereby

An electrodeionization and soft water technology, applied in separation methods, ion-exchanged water/sewage treatment, dispersed particle separation, etc., can solve problems such as polluting the environment, cumbersome regeneration operations, and increasing the salt concentration of water bodies.

Inactive Publication Date: 2003-08-13
王明亚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The regeneration operation is cumbersome, and a large amount of waste water is discharged, which increases the salt concentration of the water body and pollutes the environment

Method used

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  • Method for preparing soft water by electro-deionization and device thereby
  • Method for preparing soft water by electro-deionization and device thereby
  • Method for preparing soft water by electro-deionization and device thereby

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Embodiment Construction

[0020] The principle, device structure and examples are explained in detail below in conjunction with the accompanying drawings.

[0021] attached figure 1 It is an electric deionization soft water device composed of anion and cation membranes arranged alternately. It is similar to a general electrodialyzer, and its characteristic is that each fresh water chamber is filled with a single strong acid cation exchange resin. The device is mainly composed of three parts: a membrane stack 5 , an electrode device 6 and a fastening device 7 . The basic unit of the membrane stack is called a membrane pair, which is composed of a negative membrane 1, a fresh water partition 3, a positive membrane 2, and a concentrated water partition 4, forming a concentrated water chamber and a fresh water chamber, which are filled in the fresh water chamber. Strongly acidic cation exchange resin 8 (attached figure 2 ). The membrane stack is composed of several membrane pairs.

[0022] attached ...

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Abstract

The present invention relates to a desalting-softening water-purifying method combining electrodialysis with ion exchange organically and its equipment. It is characterized by that this method and equipment only consume electric energy without use of edible salt, and when it is used under the normal condition, said water-softening device can be continuously operated, without need of regeneration, and in the special case of needing regeneration, it can use H (+) ions produced from water electroionization to conveniently make regeneration. As compared with existent technology, it is simple in operation, convenient in use, low in operation cost and easy to implement automation, etc..

Description

technical field [0001] The invention relates to a water softening method and the device used in organically combining electrodialysis and ion exchange, which can be used to replace the sodium ion exchange softening method and the device. Background technique [0002] Electrodialysis is a membrane separation and desalination method that uses the selective permeability of ion exchange membranes to ions in solution under the action of a direct current electric field to separate electrolyte solutes in water. Desalting by electrodialysis can generally remove 60% to 95% of the salt content of the raw water, while calcium and magnesium ion salts still occupy a certain proportion of the residual salt in the electrodialyzer effluent, resulting in the hardness of the water treated by electrodialysis still exceeding The water quality standard stipulated in the low-pressure boiler water quality standard GB 1576-1996, therefore, the water treated by electrodialysis alone cannot meet the ...

Claims

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Application Information

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IPC IPC(8): C02F1/42C02F1/469
Inventor 王方
Owner 王明亚
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