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Electrodeionization device and method comprising control of the electric current by measurement of ion-exchange material expansion

A technology of ion exchange and material, applied in the direction of ion exchange treatment device, ion exchange column/bed method, ion exchange, etc., can solve the problems of insufficiency, waste, unsatisfactory current adjustment parameters, etc., to avoid mechanical damage, The effect of solution optimization

Active Publication Date: 2012-03-14
MILLIPORE CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Using temperature as a current regulation parameter in EDI is not satisfactory because temperature is not directly related to pollutant levels
[0019] Therefore, prior art methods for controlling the current in EDI equipment are either insufficient or too wasteful, so there is a need for a simple and reliable method for regulating the current and maintaining a sufficient degree of regeneration of the ion exchange material in the EDI
Furthermore, none of these prior art documents consider or suggest the expansion of the ion exchange material as a parameter to control the current

Method used

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  • Electrodeionization device and method comprising control of the electric current by measurement of ion-exchange material expansion
  • Electrodeionization device and method comprising control of the electric current by measurement of ion-exchange material expansion
  • Electrodeionization device and method comprising control of the electric current by measurement of ion-exchange material expansion

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Embodiment Construction

[0080] To facilitate understanding, if possible, the same reference numerals are used to denote elements common to the drawings. The illustrations are not to scale and the relative sizes of the various elements in the drawings are schematic descriptions and not to scale.

[0081] In all figures, the compartment is defined by its frame.

[0082] figure 1 It is a schematic representation of the method according to the invention of the EDI device 2 according to the invention.

[0083] According to the method of the present invention, the device 2 can be used to remove anions or to remove cations, as well as for complete deionization.

[0084] The incoming polar liquid stream (F arrow) enters the device 2 through the inlet 4. The deionized liquid stream or diluent (arrow D) flows out of the device 2 through the outlet 6. The concentrated liquid stream (arrow C) can flow out from the outlet 5. Two end plates 7 and 8 each including an electrode define modules (7, 8) of compartments (9, 1...

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Abstract

Device (2) for the removal of ions from a polar liquid (F), e.g. water, comprising at least one compartment (14') which comprises at least one inlet for an entering polar liquid flow and at least one outlet for an outgoing deionized liquid flow (D), in which said compartment (14') an electrochemically regenerable ion-exchange material fills a zone through which zone a liquid flow is able to pass, the device (2) being characterized in that it comprises one sensor (1) of at least one dimensional change of the ion-exchange material. The sensor can comprise a photo-sensor or a sensor of mechanical stress. Preferably an apparatus (100, 10, 11) connected to the sensor is able to analyze this dimensional change and to control the electric current. Method of using said device (2), whereby the electrical current applied to the device (2) is controlled according to the expansion of the resin.

Description

Technical field [0001] The present invention relates to a special electrodeionization (EDI) device and method. This device and method are used to produce at least partially deionized liquid from a polar liquid supply stream. [0002] Here, "deionized" means "deionized", "deionized", or "fully deionized" (that is, both deionized and deionized), regardless of the achieved deionization Degree. Background technique [0003] Continuous or discontinuous EDI is a well-known method in the art, which uses electroactive media and potential differences to drive ion transport to at least partially remove ionizable and ionizable species from polar liquids such as water. . Deionization occurs in at least one diluent compartment of EDI, which is a compartment in an electrochemical device where purification is performed, that is, pollutants are removed. [0004] EDI currently involves standard water deionization technology. Its original principle, namely the use of mixed bed ion exchange resin ...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F1/42
CPCB01D61/485B01D61/52B01D61/54B01J47/028B01J47/04B01J47/06B01J49/09B01J49/30C02F1/4695C02F2209/03C02F2303/16
Inventor A·格拉博夫斯基
Owner MILLIPORE CORP
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