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Electrodeionization device

A technology of electrodeionization and cation exchange membrane, applied in the field of pure water preparation, can solve the problems of high resistance and high energy consumption of device operation, and achieve the effects of improving conductivity, simplifying difficulty and improving uniformity

Active Publication Date: 2017-09-15
赵寰宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an electrodeionization device to solve the problem of high internal resistance of the module and high energy consumption of the device in the existing electrodeionization device

Method used

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  • Electrodeionization device
  • Electrodeionization device

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Conductive spacer is prepared according to the following method: polypropylene, graphene, coupling agent are carried out hot-melt mixing, extrusion granulation is made conductive polypropylene particle masterbatch, and the addition of graphene is 0.8wt% of polypropylene; Then, the conductive polypropylene thread is prepared by mixing the conductive masterbatch and polypropylene, and the conductive polypropylene thread is used to weave the graphene-modified polypropylene conductive spacer. The diameter of the conductive polypropylene wire is 0.25mm, the weaving form of the mesh is twisted, the thickness of a single layer is 0.6mm, and the hole of the mesh is 30#. The coupling agent is silane coupling agent A172, and the amount of coupling agent relative to polypropylene is 1 wt%.

Embodiment 2

[0039] Conductive spacer is prepared according to the following method: polypropylene, graphene, coupling agent are carried out hot-melt mixing, extruding granulation to make conductive polypropylene particle masterbatch, and the addition of graphene is 0.5wt% of polypropylene; Then, the conductive polypropylene thread is prepared by mixing the conductive masterbatch and polypropylene, and the conductive polypropylene thread is used to weave the graphene-modified polypropylene conductive spacer. The diameter of the conductive polypropylene wire is 0.3mm, the weaving form of the mesh is twisted, the thickness of a single layer is 0.5mm, and the hole of the mesh is 40#. The coupling agent is polypropylene grafted maleic anhydride PP-MAH, and the amount of coupling agent relative to polypropylene is 5 wt%.

Embodiment 3

[0041] Conductive spacer is prepared according to the following method: polypropylene, graphene, coupling agent are carried out hot-melt mixing, extrusion granulation is made conductive polypropylene particle masterbatch, and the addition of graphene is 1wt% of polypropylene; Then Conductive polypropylene filaments were prepared by mixing conductive masterbatch and polypropylene, and the graphene-modified polypropylene conductive grid was woven with conductive polypropylene filaments. The diameter of the conductive polypropylene wire is 0.2mm, the weaving form of the mesh is twisted, the thickness of a single layer is 0.8mm, and the hole of the mesh is 20#. The coupling agent is silane coupling agent A172, and the amount of coupling agent relative to polypropylene is 3 wt%.

[0042] Graphene modified low membrane resistance heterogeneous ion exchange membrane embodiment

[0043] In the following examples,

[0044] The cation exchange resin is a gel-type strongly acidic catio...

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Abstract

The invention discloses an electrodeionization device. The device comprises an anode chamber, a cathode chamber as well as fresh water chambers and concentrated water chambers which are arranged between the anode chamber and the cathode chamber alternately, wherein each fresh water chamber is isolated from one adjacent concentrated water chamber through a cation exchange membrane and an anion exchange membrane, and the fresh water chambers are filled with mixed-bed ion exchange resin; the cation exchange membranes are graphene modified cation exchange membranes, and the anion exchange membranes are graphene modified anion exchange membranes. The graphene modified ion exchange membranes replace original ion exchange membranes, at least one graphene modified polypropylene conductive partition net is arranged in at least one of the concentrated chambers, the anode chamber and the cathode chamber, the electric conductivity of the ion exchange membranes and the concentrated chambers can be effectively improved, and the internal resistance of an electrodeionization module is reduced; meanwhile, by comparison with the manner that the concentrated chambers are filled with resin to reduce resistance of a module, the filling difficulty is simplified, and the problems that a process is complicated, requirements for operation control are high and the like due to concentrated water circulation and salt addition to the concentrated chambers are avoided.

Description

technical field [0001] The invention belongs to the technical field of pure water preparation, in particular to an electrodeionization device. Background technique [0002] Electrodeionization (EDI stands for Electrodeionization) is a process in which mixed ion exchange resins are used to adsorb anions and cations in the feed water, and these ions adsorbed on the ion exchange resin are removed through the anion and cation exchange membranes under the action of direct current. At present, the electrodeionization device is widely used in the field of pure water and ultrapure water preparation. Its main structure includes a tightening plate, an anode chamber (including anode), a cathode chamber (including a cathode), and a It consists of a plurality of repeated concentrated water chambers and fresh water chambers. These concentrated water chambers and fresh water chambers are formed by alternately arranging anion exchange membranes and cation exchange membranes. Anion and cat...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F103/08
CPCC02F1/4693C02F2103/08
Inventor 张平原张平凡孙占威任大超赵寰宇
Owner 赵寰宇