Energy-saving universal oil-water separation device

Abstract

The invention discloses an energy-saving universal oil-water separation device which comprises an oil-water mixed liquid injection unit, a light oil / water separation unit, a heavy oil / water separation unit, a drainage unit and a fixing unit, the fixing unit is used for fixing the oil-water separation device; the oil-water mixed liquid injection unit comprises an infusion pump and an injection pipe which are used for realizing continuous injection of oil-water mixed liquid; the light oil / water separation unit comprises a filtering module based on a super-hydrophobic-super-oleophylic metal net and a light oil discharge channel; the drainage unit comprises a partition plate used for preventing oil from being brought out of the drainage unit, an automatic drainage module and an overflow valve. The heavy oil / water separation unit comprises a super-hydrophobic-super-oleophylic filter screen for filtering a heavy oil / water mixed solution and a fixing module of the super-hydrophobic-super-oleophylic filter screen. When a light oil (or heavy oil) / water mixed solution or an oil-water mixed solution of three components of heavy oil / water / light oil is continuously injected into the separation device, oil-water separation can be automatically completed in an energy-saving manner; the device is simple, and is easy to operate and implement.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation, and in particular relates to an energy-saving general-purpose oil-water separation device. Background technique [0002] With the acceleration of industrialization, environmental pollution has become increasingly serious; among them, the continuous discharge of industrial oily wastewater and frequent oil spill accidents have caused serious damage to water resources and ecological environment. Although traditional oil-water separation technologies such as gravity sedimentation method, centrifugal method, adsorption method, etc., can achieve the purpose of oil-water separation, there are common problems such as low separation efficiency and insufficient separation purity. Therefore, how to achieve effective oil-water separation has received great attention from academia and industry. [0003] Superhydrophobic materials have been widely studied in the field of oil-water separation in r...

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Problems solved by technology

The document W. Yang, et al. Superhydrophobic copper coating: Switchable wettability, on-demand oil-water separation, and antifouling [J]. Chemical Engineering Journal, 2017, 327: 849-854. reported a superhydrophobic copper coating based on The small filter device with mesh interlayer achieves a good separation effect of heavy oil / water mixture; but the separation capacity of this device is very limited, and it is difficult to be used for the separation of light oil / water mixture

Document A.K. Kota, et al, Hygro-responsive membranes for effective oil-waterseparation [J]. Nature communications, 2012, 3: 1025. Adopt "dual channel" structure, that is, in the lower position of the upper side wall of the above-mentioned interlayer filter device A hole is cut at the center to realize the sustainable separation of oil and water flowing out from different channels; however, this structure is not easy to control and has problems such as poor separation purity

In the literature T.P.Lei, et al.2D→3D conversion of superwetting mesh: A simple but powerful strategy for effective and efficient oil / water separation[J].Separation and Purification Technology,2020,242:116244. It is proposed that the 2D planar superhydrophobic filter It is transformed into a 3D container structure and combined with pumping technology to achieve sustainable separation of oil / water mixtures of any density; however, this structure cannot achieve the separation of light oil, water, and heavy oil, and the use of pumps requires additional energy

Patent. Cai Xiaomei, et al. A device for separating heavy oil, light oil, and water and its separation method: China, 201811386079.0 [P], 2021-10-26. It is proposed to divide the 3D superhydrophobic container into two separation areas , and use liquid level sensors and pumps to control the accumulated water height, so as to realize the simultaneous separation of light oil, water and heavy oil; but this device still needs to consume additional energy and the separation process control is relatively cumbersome

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