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Preparation method of oily sewage treatment dynamic membrane based on metal net-ceramic composite base membrane

A ceramic composite and sewage treatment technology, which is applied in the direction of osmosis/dialysis water/sewage treatment, separation methods, chemical instruments and methods, etc., can solve the problems of low porosity, uneven pore size, and blockage of suspended particles in ceramic membranes, and achieve extended Strong acid-base cleaning cycle, simple preparation process, and improved hydrophilicity

Pending Publication Date: 2022-08-09
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal membrane material is a hydrophobic material, and oil stains are prone to enrichment on the membrane surface during the dynamic membrane backwashing stage, causing contamination of the base membrane, and acid-base cleaning is required to restore performance
The ceramic membrane has good hydrophilicity, but the porosity of the ceramic membrane is lower than that of the metal mesh, and the pore size is not uniform, so it is easy to be blocked by suspended particles, and the water treatment flux is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A stainless steel sintered mesh with a pore size of 20 microns was used, and the stainless steel sintered mesh was ultrasonically cleaned with acetone, anhydrous ethanol and deionized water for 10 min, and then dried in dry nitrogen.

[0030] The alumina ceramic was installed on the magnetron sputtering target, the sputtering direction was directed to the central substrate stage, the included angle with the vertical axis was 30°, and the target-base distance was 100 mm. Place the stainless steel mesh on the sample stage of the sputtering chamber, close the door of the sputtering chamber, and pump the chamber to vacuum. Switch the argon gas to the ion source, turn on the Kaufman ion source, and perform ion cleaning on the sample surface for 300 s. Switch the passage of argon gas to the sputtering chamber, keep the working pressure in the sputtering chamber at 1Pa, set the sputtering power to 300W, and start the coating, and the coating time is 15min. A ceramic coating w...

Embodiment 2

[0034] A stainless steel sintered mesh with a pore size of 30 microns was used, and the stainless steel sintered mesh was ultrasonically cleaned with acetone, anhydrous ethanol and deionized water for 10 min, and then dried in dry nitrogen.

[0035] The alumina ceramic was installed on the magnetron sputtering target, the sputtering direction was directed to the central substrate stage, the included angle with the vertical axis was 30°, and the target-base distance was 100 mm. Place the stainless steel mesh on the sample stage of the sputtering chamber, close the door of the sputtering chamber, and pump the chamber to vacuum. Switch the argon gas to the ion source, turn on the Kaufman ion source, and perform ion cleaning on the sample surface for 300 s. Switch the passage of argon gas to the sputtering chamber, keep the working pressure in the sputtering chamber at 1Pa, set the sputtering power to 300W, and start the coating for 15min. A ceramic coating with a thickness of ab...

Embodiment 3

[0039] A copper mesh with a pore size of 20 microns was used, and the copper mesh was ultrasonically cleaned with acetone, absolute ethanol and deionized water for 10 min in turn, and then dried in dry nitrogen.

[0040] The alumina ceramic was installed on the magnetron sputtering target, the sputtering direction was directed to the central substrate stage, the included angle with the vertical axis was 30°, and the target-base distance was 100 mm. Place the copper mesh on the sample stage of the sputtering chamber, close the door of the sputtering chamber, and pump the chamber to vacuum. Switch the argon gas to the ion source, turn on the Kaufman ion source, and perform ion cleaning on the sample surface for 300 s. Switch the passage of argon gas to the sputtering chamber, keep the working air pressure in the sputtering chamber at 1Pa, set the sputtering power to 300W, and start the coating for 10min. A ceramic coating with a thickness of about 0.15 microns was obtained.

...

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PUM

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Abstract

The invention discloses a preparation method of an oily sewage treatment dynamic membrane based on a metal net-ceramic composite base membrane. According to the preparation method, a porous metal net is adopted as a dynamic membrane substrate, a hydrophilic material ceramic layer is uniformly coated on the surface of the metal net through a magnetron sputtering technology, and a hydrophilic metal net-ceramic composite base membrane dynamic membrane is formed. According to the dynamic membrane prepared by the preparation method, on the premise of ensuring high water flux of the dynamic membrane, the oil pollution resistance of the dynamic membrane is improved, the acid-base and other strong cleaning periods of the dynamic membrane are prolonged, and the equipment operation and maintenance cost and the medicament consumption are reduced.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a preparation method of a dynamic membrane for oily sewage treatment based on a metal mesh-ceramic composite base membrane. Background technique [0002] With the economic development, my country's demand for crude oil has increased year by year, and "increasing reserves and increasing production" is the first major problem to be solved in the oil and gas exploration industry. Marginal oil fields such as low permeability and heavy oil, and oil fields entering the middle and late stages of production play an indispensable role in increasing reserves and production. This part of the oilfield is very difficult to exploit. In order to improve the recovery rate, it is usually necessary to use water injection or gas injection technology. The water content of the produced crude oil reaches 70% to 80%, and some even reach more than 90%. Therefore, a large number of difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/14B01D69/02B01D71/02C23C14/02C23C14/06C23C14/08C23C14/35C02F1/44C02F1/40
CPCB01D69/12B01D69/14B01D69/02B01D71/022B01D71/02C23C14/0635C23C14/0647C23C14/0652C23C14/081C23C14/351C23C14/022C02F1/44C02F1/40B01D2325/36
Inventor 段翠佳陈赞贾志伟盛春光臧毅华袁标
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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