Method for controlling and method for designing electrical deionization device

A technology of electrodeionization and control methods, applied in the direction of separation methods, control/manipulation systems, chemical instruments and methods, etc., can solve the problems of increasing the thickness of battery cells, etc.

Pending Publication Date: 2019-12-24
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] There has not been any report on the method of ensuring the boron removal rate for the preset purpose and increasing the thickness of the battery cell to the extent possible to make the part of the battery cell filled with small particle diameter resin appropriate.

Method used

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  • Method for controlling and method for designing electrical deionization device
  • Method for controlling and method for designing electrical deionization device
  • Method for controlling and method for designing electrical deionization device

Examples

Experimental program
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Embodiment

[0110] [Example of the first invention]

[0111] Use activated carbon-RO-degassing membrane to treat tap water as raw water, and pass it into figure 1 Electrodeionization device. The electrodeionization device has a desalination chamber with three chambers, forming an effective height of 60 cm x width of 22.4 cm x thickness of 5.0 mm. As for the ion exchange resin, a mixed resin of 60% of anion exchange resin and 40% of cation exchange resin was filled only in the demineralization chamber as the ion exchange resin. A spacer is arranged in the concentrating chamber.

[0112] The flow rate Q etc. are as follows.

[0113] Q=120L / Hr (average desalination room per room)

[0114] s=0.2

[0115] Carry out automatic calculation and automatic control according to the formula (9), (10) so that the production water boron concentration becomes 1ppt with a computer.

[0116] At the time of the initial operation, the boron concentration of the feed water was operated at 3 ppb, and th...

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Abstract

In the present invention, the boron concentration and the flow rate of raw water, which is fed into a desalination chamber 2, and the target boron concentration of produced water are inputted to a control device; a flow rate Q inside the desalination chamber 2 and a flow rate s*Q inside a concentration chamber 5 are preset and the preset values are inputted to the control device; and an electricalcurrent value is calculated in accordance with the boron concentration of raw water and the target boron concentration of produced water. Electricity is applied across an anode and a cathode with this electrical current value.

Description

technical field [0001] The invention relates to a control method and a design method of an electrodeionization device, in particular to a control method and a design method of an electrodeionization device for obtaining treated water with low concentrations of boron and other weak ion components. Background technique [0002] image 3 It is a schematic diagram of an electrodeionization device. In this electrodeionization device, a plurality of anion exchange membranes 13 and cation exchange membranes 14 are alternately arranged between electrodes (anodes 11 and cathodes 12) to alternately form concentration chambers 15 and desalination chambers 16. Anion exchangers and cation exchangers made of fibers or grafted exchangers are filled in the desalination chamber 16 in a mixed or multilayered manner. 17 is the anode chamber, and 18 is the cathode chamber. [0003] In recent years, the requirement for boron concentration in ultrapure water in semiconductor factories has gradua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/54B01D61/44C02F1/469
CPCB01D61/44B01D61/54C02F1/469Y02A20/124C02F1/4691C02F1/008
Inventor 佐藤伸
Owner KURITA WATER INDUSTRIES LTD
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