Method and apparatus for preparing pure water by continuous electricity deionizing

A technology of electrodeionization and pure water, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high manufacturing cost, high price, easy scaling, etc. Achieve the effect of reducing manufacturing cost and reducing water and electricity consumption

Inactive Publication Date: 2004-06-16
彭昌盛 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] At present, the EDI equipment produced abroad all adopts homogeneous ion exchange membrane, which has high manufacturing cost and high price.
In addition, EDI equipment is prone to fouling and has extremely stric

Method used

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  • Method and apparatus for preparing pure water by continuous electricity deionizing
  • Method and apparatus for preparing pure water by continuous electricity deionizing
  • Method and apparatus for preparing pure water by continuous electricity deionizing

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Embodiment Construction

[0029] Such as figure 1 As shown, the raw water is prepared from tap water and distilled water in different proportions, and the ion-exchange membrane used is a domestic heterogeneous ion-exchange membrane. Raw water first enters EDI1(1), and 18V voltage is applied to both ends of the electrodes of EDI1(1) to perform primary desalination of raw water: EDI1(1)’s desalination chamber effluent enters EDI2(2), and is connected between the electrodes of EDI2(2). Add 25V voltage to the terminal to deeply desalinate the raw water; the water from the desalination chamber of EDI2(2) enters EDI3(3), and no voltage is applied to both ends of the electrodes of EDI3(3), and the desalination chamber of EDI3(3) is equivalent to ion exchange The mixed bed, through the exchange and adsorption of ion exchangers to the residual electrolyte ions in the water, makes the effluent of the desalination chamber of EDI3(3) reach the quality of pure water. EDI3 (3) fresh room effluent passes through te...

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Abstract

The invention relates to a process and apparatus for making pure water by consecution electrical deionizing, wherein four same EDI devices are employed, wherein three of them are in series connection for making pure water, the other EDI apparatus is used as the regeneration device of ion exchange agent. According to the invention, the three procedures of ion exchange adsorption, ion directional transfer and electrochemical regeneration are arranged in different EDI devices, thus making them work under optimum status. The EDI devices in the invention can lower the EDI manufacturing cost substantially.

Description

Technical field [0001] The invention relates to a method and equipment for preparing pure water, in particular to a method and equipment for preparing pure water by continuous electrodeionization technology. Background technique [0002] The pharmaceutical, chemical and semiconductor industries require a large amount of pure water. In the past few decades, the preparation of pure water was mainly by multi-stage distillation and ion exchange. The multi-stage distillation method has high energy consumption and high cost; the ion exchange method requires a large amount of acid and alkali to regenerate the resin, which will cause serious pollution to the environment. [0003] In recent years, a green and environmentally friendly pure water production technology that organically combines electrodialysis and ion exchangers——continuous electrodeionization technology (Electrodeionization, referred to as EDI) has developed rapidly in western developed countries and has been applied i...

Claims

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Application Information

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IPC IPC(8): C02F9/06
Inventor 孟洪彭昌盛卢寿慈
Owner 彭昌盛
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