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Graphene conductive composite material filter cloth for electric sludge dewatering equipment and its manufacturing method, installation and use method

A conductive composite material and sludge dehydration technology, applied in water/sludge/sewage treatment, separation methods, chemical instruments and methods, etc., can solve problems such as short service life of anodes, reduced equipment efficiency, and sludge pollution, and achieve The effect of prolonging the service life, simplifying the structure and reducing the loss cost

Active Publication Date: 2018-06-08
SHANGHAI TECHASE ENVIRONMENT PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using metal materials with good conductivity for electroosmotic dehydration, it will cause corrosion, the service life of the anode will be short, the efficiency of the equipment will decrease with the increase of use time, and the sludge near the anode will be easily polluted.

Method used

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  • Graphene conductive composite material filter cloth for electric sludge dewatering equipment and its manufacturing method, installation and use method
  • Graphene conductive composite material filter cloth for electric sludge dewatering equipment and its manufacturing method, installation and use method
  • Graphene conductive composite material filter cloth for electric sludge dewatering equipment and its manufacturing method, installation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of graphene conductive composite material filter cloth of the present invention, it is made as follows:

[0042] (1), preparation of graphene aqueous solution

[0043] Weigh 20mg reduced graphene oxide powder, graphene quantum dot powder obtained by oxidizing 10mg graphene with concentrated sulfuric acid or a mixed acid of concentrated sulfuric acid and concentrated nitric acid, wherein the carbon and oxygen atomic content ratio is 20:1, the average The lateral dimension is about 10 nm. The above two powders were added to 40 mL of deionized water to prepare a mixed suspension of graphene and graphene quantum dots, and the suspension was ultrasonically dispersed to obtain a stably dispersed graphene aqueous solution.

[0044] (2) Fabrication of graphene conductive composite material filter cloth

[0045] Soak the polypropylene fiber (polypropylene fiber) filter cloth in the graphene aqueous solution for 8 hours, take it out, bake it at 120° C. for 8 hours, and t...

Embodiment 2

[0049]A kind of graphene conductive composite material filter cloth of the present invention, it is made as follows:

[0050] (1), preparation of graphene aqueous solution

[0051] Weigh 5mg of graphene powder prepared by liquid phase exfoliation, and 30mg of graphene oxide obtained by DMF solvothermal cutting of graphene quantum dot powder, wherein the carbon and oxygen atomic content ratio is 5:1, and the average lateral size is about 2nm . The above two powders were added to 40 mL of deionized water to prepare a mixed suspension of graphene and graphene quantum dots, and the suspension was ultrasonically dispersed to obtain a stably dispersed graphene aqueous solution.

[0052] (2) Fabrication of graphene conductive composite material filter cloth

[0053] Soak the polypropylene fiber (polypropylene fiber) filter cloth in the graphene aqueous solution for 10 hours, take it out, bake it at 80°C for 6 hours, and then make the graphene conductive composite material filter cl...

Embodiment 3

[0057] A kind of graphene conductive composite material filter cloth of the present invention, it is made as follows:

[0058] (1), the reduced graphene oxide powder is uniformly dispersed in the organic solvent N-methylpyrrolidone (NMP) by an ultrasonic dispersion method to obtain a stably dispersed graphene dispersion;

[0059] (2) Fabrication of graphene conductive composite material filter cloth

[0060] Soak the polypropylene fiber (polypropylene fiber) filter cloth in the graphene dispersion for 6 hours, take it out, and bake it at 160° C. for 10 hours to make a graphene conductive composite material filter cloth. The filter cloth has good water permeability and electrical conductivity.

[0061] The above-mentioned graphene conductive composite material filter cloth is installed and used as follows:

[0062] like figure 1 , figure 2 As shown, the graphene conductive composite material filter cloth 2 of the present invention replaces the common filter cloth on the an...

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Abstract

The invention discloses a graphene conductive composite filter cloth for electric sludge dewatering equipment and a manufacturing method and installing and using methods of the graphene conductive composite filter cloth. The manufacturing method comprises the steps that firstly, a stably-dispersed graphene dispersion solution is prepared; secondly, a filter cloth body is soaked in the graphene dispersion solution for 6-10 h and then taken out, and the soaked filter cloth body is roasted for 6-10 h at 80-160 DEG C; or, before the filter cloth body is woven, fiber monofilaments are put into the graphene dispersion solution to be soaked for 0.5-5 h or pass through the graphene dispersion solution, graphene is attached to the fiber monofilaments, then the filter cloth body is woven, and the graphene conductive composite filter cloth is manufactured. The graphene conductive composite filter cloth is installed on an anode filter frame of plate frame type filter pressing equipment and connected with the positive electrode of a direct-current power supply and serves as an electric anode. The graphene composite is excellent in conductivity and has very high chemical and electrochemical corrosion resistance when serving as the anode material. The graphene anode material and the filter cloth body are integrated, and the structure of core assemblies of the equipment is simplified.

Description

technical field [0001] The invention belongs to the technical field of sludge dewatering, and relates to a graphene conductive composite material filter cloth for electric (electro-osmotic) sludge dewatering equipment, a manufacturing method, and an installation and use method thereof. Background technique [0002] In order to make urban sludge meet the subsequent disposal requirements, many sludge treatment companies use plate and frame filter press for dehydration. The traditional plate and frame filter press conditioning method is to add 5% to 10% ferric chloride, 20% to 30% quicklime and other inorganic conditioners on the dry basis of sludge for conditioning. This conditioning technology does not really achieve the purpose of sludge reduction, and the calorific value of sludge is further reduced. [0003] Sludge electric dehydration is a method of dehydrating sludge by applying an electric phenomenon by applying a DC voltage. The electrokinetic phenomenon refers to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/08C02F11/12
CPCB01D39/08C02F11/12C02F2303/06
Inventor 刘道广丁巧胡君荣申晶
Owner SHANGHAI TECHASE ENVIRONMENT PROTECTION
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