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Deionized water production system, electrodeionization device, and method for producing deionized water

A technology of deionized water and electrodeionization, applied in separation methods, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as increased power consumption, achieve low power consumption, and promote more stable and efficient dissociation The effect of the reaction

Active Publication Date: 2022-03-04
ORGANO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the operating voltage becomes higher, the power dissipation increases proportionally

Method used

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  • Deionized water production system, electrodeionization device, and method for producing deionized water
  • Deionized water production system, electrodeionization device, and method for producing deionized water
  • Deionized water production system, electrodeionization device, and method for producing deionized water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The EDI device that uses among the embodiment 1 and comparative example 1 has following structure: Image 6 In the shown EDI device, the basic structure (unit set) constituted by an anion exchange membrane (AEM) 32, a deionization chamber 23, a cation exchange membrane (CEM) 33, and a concentrating chamber 24 between an anode chamber 21 and a cathode chamber 25 ) is assumed to be "3". A cation exchange resin (CER) is filled in the anode chamber 21 , and an anion exchange resin (AER) is filled in each of the concentration chambers 22 and 24 and the cathode chamber 25 . A cation exchange resin and an anion exchange resin are filled in the deionization chamber 23 in a mixed bed (MB) form. Using a styrene strong acid cation exchange resin with sulfonic acid groups as ion exchange groups IR120B (manufactured by Dow Chemical Company; apparent density reference value: about 840 g / L) was used as the cation exchange resin. Using a styrene strong base anion exchange resin wit...

Embodiment 2-1 and 2-2 and comparative example 2

[0101] The EDI device used in Embodiment 2-1 and 2-2 and Comparative Example 2 is such a device: Figure 10 In the shown EDI device, by anion exchange membrane 32, first small deionization chamber 26, intermediate ion exchange membrane (IIEM) 36, second small deionization chamber 27, cation exchange membrane 33, and in anode chamber 21 and cathode The number N of repetitions of the basic structure (a set of units) constituted by the concentrating chambers 24 between the chambers 25 is "3". A cation exchange resin is filled in the anode chamber 21 and the second small deionization chamber, and an anion exchange resin is filled in each of the concentration chambers 22 and 24 , the first small deionization chamber 26 and the cathode chamber 25 . An anion exchange membrane is used as an intermediate ion exchange membrane 36 that separates the first small deionization chamber 26 and the second small deionization chamber 27 . The components used for each of the anion exchange resin...

Embodiment 3 and comparative example 3

[0118] In Example 3 and Comparative Example 3, the EDI device has the same configuration as that of Example 1 and Comparative Example 1, and the dimensions of the deionization chamber, concentrating chamber, anode chamber and cathode chamber, and filled ion exchange resins are the same as those of Embodiment 1. The same as in , but use the repetition number N of the unit set in the EDI device as "1". In the device of Example 3, the catalyst particles used are the same as those used in the examples, and the treatment method of the anion exchange resin is the same as that of Example 1.

[0119] Use pure water with a conductivity not greater than 1μS / cm as the water to be treated and the supply water, the flow rate of the water to be treated is set to 60L / h, the flow rate of the concentrated water is set to 10L / h, and the flow rate of the electrode water is set to 10L / h. A voltage was then applied to the EDI device to achieve the applied current density shown in the column of t...

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Abstract

A deionized water production system supplied with raw water and producing deionized water is provided with: a reverse osmosis membrane device (RO device) to which raw water is supplied; and an electrodeionization device (EDI device) equipped with There is a deionization chamber which is separated by an ion exchange membrane and to which the permeate water of the reverse osmosis membrane device is supplied. In the EDI device, an ion exchanger is filled in the deionization chamber, and particles containing polyvalent metals are adsorbed on the surface of at least one of at least a part of the ion exchange membrane and at least a part of the ion exchanger.

Description

technical field [0001] The present invention relates to the production of deionized water, and more particularly to a deionized water production system, an electrodeionization apparatus, and a method for producing deionized water. Background technique [0002] Known deionized water manufacturing systems perform deionization by an ion exchange reaction in which water to be treated passes through an ion exchanger such as an ion exchange resin. This type of system is usually provided with a device having an ion exchanger and produces deionized water by using an ion exchange reaction carried out by the ion exchanger. However, in a device with an ion exchanger, when the ion exchange group of the ion exchanger becomes saturated and the deionization performance decreases, a process of regenerating the ion exchanger by a chemical such as acid or alkali, that is, a regeneration process must be performed . The regeneration process uses hydrogen ions (H + ) and hydroxide ions (OH -...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469B01D61/48
CPCB01D61/48C02F1/469Y02A20/131Y02A20/124C02F1/441C02F1/4695
Inventor 合庭健太佐佐木庆介日高真生
Owner ORGANO CORP
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