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Electric adsorption device of sheathed electrode

A coated electrode and electro-adsorption technology, applied in the separation method, dispersed particle separation, etc., can solve problems such as increasing interface resistance, hindering ion migration, and affecting adsorption effect

Inactive Publication Date: 2013-08-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The electric adsorption device designed by the invention patent (seawater electric desalination device and method, publication number CN 101481159A) puts the electrode piece into the water tank, and absorbs all the salt ions in the water tank by moving the electrode piece. This method cannot carry out continuous water treatment. And the distance between the plates is large, which affects the adsorption effect
When the concentration of raw water is low, the thickness of the diffusion layer on the membrane surface will increase, which will hinder the effective ion migration to a certain extent, and will also increase the interface resistance.

Method used

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  • Electric adsorption device of sheathed electrode
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  • Electric adsorption device of sheathed electrode

Examples

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Effect test

example 1

[0023] Use activated carbon as the electro-adsorption material, mix activated carbon, carbon black and 60% polytetrafluoroethylene solution according to the mass ratio of 75%, 15%, and 10%, and then add ethanol to make it into a plasticine shape and then heat it at 10MPa It is pressed on the foamed nickel under the pressure to make the electrode sheet. Then the perfluorosulfonic acid resin solution was diluted into a uniform solution according to the ratio of 5g resin solution and 1mL N,N dimethylformamide. Then coat it on the cathode electrode sheet and control the thickness to 100 μm. Put the cathode electrode sheet in an oven and dry it at 80°C for 1 hour, then raise the temperature to 160°C. After 20 minutes, raise the temperature to 180°C. After 10 minutes, close the oven and let the electrode sheet cool down naturally. In this way, an electrode sheet with a cation exchange coating is obtained, which is assembled into an electro-absorption device, and the electro-absorpti...

example 2

[0026] Use activated carbon as the electro-adsorption material, mix activated carbon, carbon black and 60% polytetrafluoroethylene solution according to the mass ratio of 75%, 15%, and 10%, and then add ethanol to make it into a plasticine shape and then heat it at 10MPa It is pressed on the foamed nickel under the pressure to make the electrode sheet. Then the perfluorosulfonic acid resin solution was diluted into a uniform solution according to the ratio of 5g resin solution and 1mL N,N dimethylformamide. Then coat it on the cathode electrode sheet and control the thickness to 1 μm. Put the cathode electrode sheet in an oven and dry it at 80°C for 1 hour, then raise the temperature to 160°C. After 20 minutes, raise the temperature to 180°C. After 10 minutes, close the oven and let the electrode sheet cool down naturally. In this way, an electrode sheet with a cation exchange coating is obtained, which is assembled into an electro-absorption device, and the electro-absorption...

example 3

[0029] Use activated carbon as the electro-adsorption material, mix activated carbon, carbon black and 60% polytetrafluoroethylene solution according to the mass ratio of 75%, 15%, and 10%, and then add ethanol to make it into a plasticine shape and then heat it at 10MPa It is pressed on the foamed nickel under the pressure to make the electrode sheet. Using aluminum trichloride as a catalyst, chloroacetyl chloride is used to carry out the chloroacetylation reaction of polyphenylene ether. The obtained chloroacetylated polyphenylene ether was dissolved in N,N dimethylformamide to make a casting solution with a concentration of 20%, and then it was coated on the anode electrode sheet and the thickness was controlled to 20μm. The electrode sheet is placed in an oven and dried at 60°C to solidify the electrode surface. After the electrode sheet is safely dried, it is immersed in a 30% trimethylamine solution and reacted for 24 hours to obtain an electrode sheet with anion exchang...

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Abstract

The invention discloses an electric adsorption device of a sheathed electrode. The electric adsorption device comprises a liquid inlet (1), a liquid outlet (2), a supporting plate (3), an electrode substrate (4), an adsorption material (5), an insulation washer (6) and a coating (7) with an ion exchanging function. An electrode anode is connected with a positive electrode of a power supply, the surface of the positive electrode of the power supply is coated with the coating with the anion exchanging function, an electrode cathode is connected with a negative electrode of the power supply, and the surface of the electrode cathode is coated with a coating with the cation exchanging function. The coating can block the passing of ions with specific charges in the water treatment. Compared with the traditional electric adsorption device, the adsorption efficiency is increased, and the energy consumption is reduced.

Description

Technical field: [0001] The invention relates to a device for removing charged ions in a solution, which can be used for wastewater treatment and seawater desalination. Background technique: [0002] Electro-absorption water treatment technology is also called capacitive desalination technology. In the case of applied voltage, the phenomenon that the charged electrode adsorbs the dissolved ions or charged particles in the water makes the ions dissolved in the water or other charged substances in the solution adsorbed on the surface of the electrode plate. So as to achieve the desalination and purification of water. Electrosorption is different from other electrodeionization in many aspects. One of the differences is that the electrosorption process is to purify water under the condition of no oxidation-reduction reaction. Charged ions or particles are only adsorbed to the electrode by the action of an electric field. An electric double layer is formed. This method has the advan...

Claims

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Application Information

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IPC IPC(8): C02F1/469
Inventor 孟庆函曹兵马锐
Owner BEIJING UNIV OF CHEM TECH
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