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T-type oil-water separation equipment integrating two special wettable materials

A technology of oil-water separation and wettability, which is applied in the field of T-type oil-water separation equipment and integrated oil-water separation device to meet the requirements of reducing mechanical strength, breaking through limitations, and reducing the effect of hydrostatic pressure

Active Publication Date: 2016-05-18
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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  • T-type oil-water separation equipment integrating two special wettable materials
  • T-type oil-water separation equipment integrating two special wettable materials
  • T-type oil-water separation equipment integrating two special wettable materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The commercial copper mesh was washed in acetone, ethanol, distilled water and HCl to remove dirt and oxides on the surface.

[0030] After drying, the cleaned copper mesh was immersed in a mixed aqueous solution of 0.5M sodium hydroxide and 0.1M potassium persulfate for 30 minutes to oxidize, and then washed with distilled water and dried to obtain a uniformly covering the surface of the copper mesh with the nano-needle structure ( figure 1 ). The oxidized copper mesh was modified in perfluorodecyltriethoxysilane at 180°C for 2h to obtain the separation membrane AW.

[0031] Prepare polyacrylamide hydrogel solution. The cleaned copper mesh is carefully immersed in a uniformly stirred solution to make the solution evenly adhere to the surface of the copper mesh, and then the copper mesh is pulled out horizontally and irradiated under ultraviolet light (365nm). After 5 minutes, the copper mesh was rinsed with distilled water to obtain a copper mesh coated with polyacrylamid...

Embodiment 2

[0036] The commercial stainless steel mesh was washed in acetone, ethanol, distilled water and HCl to remove the dirt on the surface.

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

[0038] Prepare polyacrylamide hydrogel solution. The cleaned stainless steel mesh is carefully immersed in a uniformly stirred solution to make the solution evenly adhere to the surface of the stainless steel mesh, and then the stainless steel mesh is pulled out horizontally and the sample is irradiated under ultraviolet light (365nm). After 5 minutes, the sample was washed with distilled water to obtain a stainless steel mesh coated with polyacrylamide hydrogel, that is, a superhydrophilic and underwater superoleophobi...

Embodiment 3

[0044] The commercial copper mesh was washed in acetone, ethanol, distilled water and HCl to remove the dirt on the surface. After drying, soak the cleaned copper mesh in a mixed aqueous solution of 3M sodium hydroxide and 2M potassium persulfate for 30 minutes, and rinse with distilled water for drying. It was dried with distilled water ultrasonically 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. The cleaned copper mesh is carefully immersed in the evenly stirred solution to make the solution evenly adhere to the surface of the copper mesh, and then the copper mesh is pulled out horizontally and the sample is irradiated under ultraviolet light (365nm) for 120 minutes. The sample was rinsed with distilled water to obtain a copper mesh coated with ...

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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, it refers to a T-type oil-water separation device that integrates two special wettable materials. Background technique [0002] At present, serious oil spills and the discharge of industrial and domestic sewage have seriously affected the utilization of resources and human health. How to achieve 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. Chem Rev, 2014.114 (5): p.2694-716) According to this theory, researchers have pre...

Claims

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Application Information

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IPC IPC(8): B01D17/022
CPCB01D17/02B01D17/085
Inventor 赵勇王女刘晶
Owner BEIHANG UNIV
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