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A T-shaped oil-water separation device integrating two special wettable materials

An oil-water separation and wettability technology, applied in the field of integrated oil-water separation device and T-type oil-water separation equipment, to achieve the requirements of oil-water separation, reducing mechanical strength, and the effect of high-throughput oil-water separation process

Active Publication Date: 2018-09-11
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the existing separation devices, the present invention aims to design an integrated device with a special wettable functional separation membrane for efficient oil-water separation of oily wastewater; separation of regulation

Method used

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  • A T-shaped oil-water separation device integrating two special wettable materials
  • A T-shaped oil-water separation device integrating two special wettable materials
  • A T-shaped oil-water separation device integrating two special wettable materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Commercial copper grids were cleaned in acetone, ethanol, distilled water and HCl to remove dirt and oxides on the surface.

[0030] After drying, soak the cleaned copper grid in the mixed aqueous solution of 0.5M sodium hydroxide and 0.1M potassium persulfate for 30min oxidation, then wash and dry with distilled water to obtain the copper grid surface evenly covering the nanoneedle structure ( figure 1 ). The oxidized copper grid was modified in perfluorodecyltriethoxysilane at 180°C for 2h to obtain the separation membrane AW.

[0031] Prepare polyacrylamide hydrogel solution. Carefully immerse the cleaned copper grid in the uniformly stirred solution so that the solution is evenly attached to the surface of the copper grid, then draw out the copper grid horizontally and irradiate it under ultraviolet light (365nm). After 5 min, the copper grid was rinsed with distilled water to obtain a copper grid coated with polyacrylamide hydrogel, that is, the separation membra...

Embodiment 2

[0036] Commercial stainless steel meshes were cleaned in acetone, ethanol, distilled water, and HCl to remove surface contamination.

[0037] After drying, soak the cleaned stainless steel mesh in 0.1M copper chloride solution for 3 minutes, and dry it with distilled water for 10 minutes. Then, it was modified in perfluorodecyltrimethoxysilane at 90°C for 10 hours to obtain superhydrophobic and superlipophilic separation membrane AW.

[0038] Prepare polyacrylamide hydrogel solution. Carefully immerse the cleaned stainless steel mesh in the evenly stirred solution so that the solution evenly adheres to the surface of the stainless steel mesh, then draw out the stainless steel mesh horizontally and irradiate the sample under ultraviolet light (365nm). After 5 minutes, the sample was rinsed with distilled water to obtain a stainless steel mesh coated with polyacrylamide hydrogel, that is, a superhydrophilic and underwater superoleophobic separation membrane AO.

[0039] Two ki...

Embodiment 3

[0044] Commercial copper grids were cleaned in acetone, ethanol, distilled water, and HCl to remove surface contamination. After drying, soak the cleaned copper grid in the mixed aqueous solution of 3M sodium hydroxide and 2M potassium persulfate for 30 minutes, and wash and dry with distilled water. Ultrasonic drying was performed with distilled water for 10 minutes to obtain a copper mesh with a nanoneedle structure uniformly covering the surface. Then it was modified in perfluorodecyltrimethoxysilane at 150°C for 3h to obtain the separation membrane AW.

[0045] Prepare polydimethylaminoethyl methacrylate hydrogel solution. Carefully immerse the cleaned copper grid in the uniformly stirred solution so that the solution is evenly attached to the surface of the copper grid, then draw out the copper grid horizontally and irradiate the sample under ultraviolet light (365nm) for 120min. The sample was rinsed with distilled water to obtain a copper mesh coated with polydimethyl...

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Abstract

The invention discloses T-type oil-water separation equipment integrating two special wettable materials, and belongs to the technical field of wastewater treatment. The T-type oil-water separation equipment is of a three-channel structure and is arranged into a lateral T shape or an inverted T shape according to an oil-water separation system. In the three-channel structure, a vertically-upward channel serves as an oil-water mixing system inlet channel, and the other two channels serve as separation channels. A super-hydrophobic and super-oleophilic separation membrane AW and a super-hydrophilic and underwater super-oleophobic separation membrane AO are arranged in the two separation channels respectively. Compared with an existing oil-water separation mode adopting a single membrane, the problem that a liquid barrier layer is formed due to the large liquid density difference is solved, and continuous oil-water separation is achieved; meanwhile, hydrostatic pressure borne by the separation membranes is reduced in the double-channel separation mode, and the requirement for the mechanical strength of the separation membranes is reduced; continuous oil-water separation without the consideration of the oil-water density difference can be achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and relates to an integrated oil-water separation device, specifically a T-shaped oil-water separation device integrating two special wettable materials. Background technique [0002] At present, severe oil spills and discharges from industrial and domestic sewage seriously affect the utilization of resources and human health. How to realize the effective separation of oil / water mixture has become an urgent problem to be solved. Over the years, researchers have studied the structure and properties of natural materials and found that surface structure and surface chemical composition are the main factors affecting the wettability of solid surfaces (Reference 1: Bellanger, H., et al., Chemical and physical pathways for the preparation of superoleophobic surfaces and related wetting theories.ChemRev,2014.114(5):p.2694-716) According to this theory, researchers have prepared various material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/022
CPCB01D17/02B01D17/085
Inventor 赵勇王女刘晶
Owner BEIHANG UNIV
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