Oil-water separation device

Abstract

The present application provides an oil-water separation device, which relates to the technical field of oil-water separation and is used to solve the technical problem of poor oil-water separation effect. The oil-water separation device includes: a suction mechanism, a support plate, a separation mechanism and an oil delivery mechanism; the suction mechanism is used to suck the floating oil on the water surface into the water; the support plate is immersed in the water and is provided with a plurality of mounting through holes; the separation mechanism includes a plurality of outer sleeves and conical separation pieces, one end of each outer sleeve is correspondingly connected to a mounting through hole, the other end of each outer sleeve extends out of the water surface, the cone bottom of each conical separation piece is correspondingly arranged in an outer sleeve with a clearance fit, and the cone tip of each conical separation piece extends into the water along one end of the outer sleeve; the outer surface of the conical separation piece is provided with an oleophilic and hydrophobic layer; one end of the oil delivery mechanism is connected to the side wall of each outer sleeve, and the other end of the oil delivery mechanism is used to communicate with the oil storage tank. The directional self-transport of oil droplets in the water and the collection and export of the oil layer above the water are realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of oil-water separation, and in particular to an oil-water separation device. Background Art

[0002] Crude oil leakage during offshore oil and gas exploitation or transportation will threaten the marine ecosystem, and industries such as vehicle repair, industrial equipment maintenance, and catering operations will also produce a large amount of oily wastewater. Oil-water separation methods are based on the physical properties of oil and water (immiscibility, density difference, surface tension difference, etc.) and the chemical properties of oil and water (difference in organic components) and carry out gravity sedimentation, centrifugal separation, oxidation precipitation or biodegradation.

[0003] In the related art, the oil-water separation device includes a filter screen with oleophilic and hydrophobic functions, through which oil droplets in the oil-water mixture are collected to achieve oil-water separation.

[0004] However, the above-mentioned oil-water separation device cannot achieve complete collection and extraction of the above-water oil layer and the underwater oil droplets, resulting in poor oil-water separation effect. Summary of the invention

[0005] The embodiment of the present application provides an oil-water separation device, which can realize the directional self-transportation of oil droplets in water, and the collection and discharge of oil layers above water, and has high oil-water separation efficiency.

[0006] The embodiment of the present application provides an oil-water separation device, which includes: a suction mechanism, a support plate, a separation mechanism and an oil delivery mechanism; the suction mechanism is used to be arranged in water, and the suction mechanism is used to suck floating oil on the water surface into the water; the support plate is used to be horizontally immersed in water, and a plurality of mounting through holes are arranged on the support plate; the separation mechanism includes a plurality of outer sleeves and a plurality of conical separation members, one end of each of the outer sleeves is correspondingly connected to one of the mounting through holes, the other end of each of the outer sleeves extends out of the water surface, the cone bottom of each of the conical separation members is correspondingly arranged in one of the outer sleeves with a clearance fit, and the cone tip of each of the conical separation members extends into the water along one end of the outer sleeve; the outer surface of the conical separation member is provided with an oleophilic and hydrophobic layer; one end of the oil delivery mechanism is connected to the side wall of each of the outer sleeves, and the other end of the oil delivery mechanism is used to be connected to an oil storage tank.

[0007] In an embodiment of the present application, the oil delivery mechanism includes a plurality of first export pipes, a plurality of second export pipes and a main oil delivery pipe. A first export pipe is arranged between two adjacent outer casings in the first direction, and both ends of each of the first export pipes are correspondingly connected to the side walls of the two adjacent outer casings; one end of each of the second export pipes is correspondingly connected to a side wall of the outer casing close to the main oil delivery pipe, and the other end of each of the second export pipes is connected to the inlet of the main oil delivery pipe; the outlet of the main oil delivery pipe is used to communicate with the oil storage tank.

[0008] In the embodiment of the present application, a plurality of mounting through hole arrays are arranged on the support plate.

[0009] In the embodiment of the present application, there is a gap between the cone bottom of the cone separator and the outer sleeve, and the gap is used to communicate with the atmospheric environment.

[0010] In an embodiment of the present application, the separation mechanism also includes a plurality of connecting members, each of which is connected to a port at the other end of the outer sleeve; the port at the other end of the outer sleeve is flush with the bottom of the cone separator, and each of the connecting members is also connected to a bottom of the cone.

[0011] In an embodiment of the present application, the connecting member includes a connecting strip, which is horizontally overlapped with the port at the other end of the outer sleeve; the length of the connecting strip is greater than or equal to the outer diameter of the port at the other end of the outer sleeve, and the width of the connecting strip is less than the outer diameter of the port at the other end of the outer sleeve.

[0012] In the embodiment of the present application, the diameter of the first outlet tube is smaller than the diameter of the outer sleeve.

[0013] In the embodiment of the present application, the other end of the second outlet pipe is formed as an arc-shaped pipe bent toward the main oil pipeline.

[0014] In an embodiment of the present application, the suction mechanism includes a suction port, a rotating blade and a discharge port. The suction port is arranged vertically upward, and the suction port is used to suck floating oil on the water surface; the suction port and the discharge port are connected, the rotating blade is arranged between the suction port and the discharge port, the rotating blade is used to break the floating oil into oil droplets, and the discharge port is used to discharge the oil droplets into the water.

[0015] In the embodiment of the present application, the discharge port is arranged horizontally, and the discharge port is close to the cone tip of the cone separator.

[0016] The oil-water separation device provided in this embodiment has a suction mechanism for being arranged in water, and the suction mechanism is used to suck the floating oil layer on the water surface into the water, and the support plate is used to be horizontally immersed in the water, and a plurality of mounting holes are arranged on the support plate; the separation mechanism includes a plurality of outer sleeves and a plurality of conical separators, one end of each outer sleeve is correspondingly connected to a mounting hole, and the other end of each outer sleeve extends out of the water surface, and the cone bottom of each conical separator is correspondingly arranged in an outer sleeve with a clearance fit, and the cone tip of each conical separator extends into the water along one end of the outer sleeve; the outer surface of the conical separator is provided with an oleophilic and hydrophobic layer; one end of the oil delivery mechanism is connected to the side wall of each outer sleeve, and the other end of the oil delivery mechanism is used to communicate with the oil storage tank. The oil-water separation device of the embodiment of the present application can realize the directional self-transportation of oil droplets in water, and the collection and export of the oil layer on the water; at the same time, the oil-water separation device has strong feasibility, high efficiency, and low energy consumption, and the directional self-transportation of oil droplets in water, and the collection and export of the oil layer on the water are all zero-energy consumption processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the cross-sectional structure of an oil-water separation device provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the top view of the oil-water separation device provided in an embodiment of the present application;

[0020] Figure 3 Schematic diagram of the use status of the oil-water separation device provided in the embodiment of the present application Figure 1 ;

[0021] Figure 4 Schematic diagram of the use status of the oil-water separation device provided in the embodiment of the present application Figure 2 ;

[0022] Figure 5 Schematic diagram of the use status of the oil-water separation device provided in the embodiment of the present application Figure 3 ;

[0023] Figure 6 Schematic diagram of the use status of the oil-water separation device provided in the embodiment of the present application Figure 4 ;

[0024] Figure 7Schematic diagram of the structure of the support plate of the oil-water separation device provided in the embodiment of the present application Figure 1 ;

[0025] Figure 8 Schematic diagram of the structure of the support plate of the oil-water separation device provided in the embodiment of the present application Figure 2 ;

[0026] Fig. 9 for Figure 2 A magnified view of part A;

[0027] Fig.10 Schematic diagram of the contact angles of oil droplets and water droplets provided in the embodiments of the present application.

[0028] Description of reference numerals:

[0029] 100: suction mechanism;

[0030] 101: suction port; 102: discharge port;

[0031] 200: support plate;

[0032] 201: installation through hole;

[0033] 300: Separation mechanism;

[0034] 301: outer sleeve; 302: cone separator; 303: gap; 304: connecting piece;

[0035] 3021: cone bottom; 3022: cone tip;

[0036] 400: oil transportation mechanism;

[0037] 401: first outlet pipe; 402: second outlet pipe; 403: main oil delivery pipe;

[0038] 500: In water;

[0039] 501: water layer;

[0040] 600: Oil slick;

[0041] 700: oil droplets;

[0042] 701: Oil layer to be output. DETAILED DESCRIPTION

[0043] As explained in the background technology, the oil-water separation device in the related art has the technical problem that the oil layer above the water and the oil droplets under the water cannot be completely collected and discharged, resulting in poor oil-water separation effect. Technical personnel have found that the reason for this problem is that the oil-water separation method utilizes the inherent physical and chemical properties of the surface of the new material to realize the collection of oil droplets, for example: the selective wettability of the surface of the new material, that is, superhydrophobic, superhydrophilic, superoleophobic or superoleophilic properties. Superhydrophobic and superoleophilic materials can collect oil droplets in the oil-water mixture, and superhydrophilic and superoleophobic materials can collect water droplets in the oil-water mixture, thereby realizing oil-water separation. In the related art, a super-hydrophobic and super-oleophilic material is arranged on the surface of the cone structure, and the cone tip of the cone structure is vertically immersed in water. After the oil droplets in the water contact the cone tip of the cone structure, they will be adsorbed on the surface of the cone tip to achieve the separation of oil droplets and water droplets; because the surface of the cone structure has a curvature gradient characteristic along the axial direction, the local curvature of the gas-liquid interface at the retreating end of the oil droplets attached to its surface is smaller than that at the advancing end, thereby generating a Laplace pressure driving force that drives the oil droplets to transport from the cone tip to the cone bottom, so that the oil droplets are transported from the cone tip to the cone bottom, and finally float to the surface, completing the collection and transportation of the oil droplets. However, after the underwater oil droplets float to the surface, they will quickly spread into a thin oil film, resulting in the inability to completely collect and export the oil layer above the water and the underwater oil droplets, making it difficult to collect the oil droplets and the oil-water separation effect poor.

[0044] In response to the above technical problems, an embodiment of the present application provides an oil-water separation device, which sucks the floating oil layer on the water surface through a suction mechanism, and converts the floating oil layer into oil droplets and then discharges it into the water. A plurality of cone separation elements with cone tips facing downward are vertically arranged in the water, and the surface of each cone separation element is provided with an oleophilic and hydrophobic layer, so that the oil droplets in the water can be adsorbed on the surface of the cone tip and transported from the cone tip to the cone bottom; an oil conveying mechanism is also provided on the water surface, and the oil conveying mechanism is connected to each cone separation element. The oil conveying mechanism can collect the oil droplets transported from the cone tip to the cone bottom in time, and prevent the oil droplets from spreading after floating to the water surface, thereby realizing the complete collection and export of the oil layer above the water and the oil droplets underwater, and constructing a high-efficiency and low-energy oil-water separation device.

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0046] The present application provides an oil-water separation device, referring to Figure 1-Figure 6 , Figure 1 This is a schematic diagram of the cross-sectional structure of the oil-water separation device provided in the embodiment of the present application. Figure 2A schematic diagram of the top view of the oil-water separation device provided in an embodiment of the present application; Figures 3 to 6 Schematic diagram of the oil-water separation device provided in the embodiment of the present application. The oil-water separation device comprises a suction mechanism 100, which is arranged in water 500, and there is a floating oil layer 600 on the water surface, and the suction mechanism 100 is used to suck the floating oil layer 600 on the water surface into the water 500.

[0047] The oil-water separation device further includes a support plate 200 , which is used to be horizontally immersed in water 500 , and the support plate 200 is located below the floating oil layer 600 on the water surface, and a plurality of mounting through holes 201 are provided on the support plate 200 .

[0048] The oil-water separation device also includes a separation mechanism 300, which includes a plurality of vertically arranged outer sleeves 301 and a plurality of vertically arranged conical separators 302. All outer sleeves 301 are arranged on the support plate 200, and one end of each outer sleeve 301 is correspondingly connected to a mounting through hole 201, and the other end of each outer sleeve 301 extends out of the water surface; the conical separator 302 includes a cone bottom 3021 and a cone tip 3022 arranged opposite to each other in the vertical direction, and the cone bottom 3021 of each conical separator 302 is correspondingly arranged in an outer sleeve 301 with a clearance fit, that is, there is a gap between the outer surface of the cone bottom 3021 and the inner wall surface of the outer sleeve 301; the cone tip 3022 of each conical separator 302 extends successively along one end of the outer sleeve 301 and the mounting through hole 201 into the water 500.

[0049] At the same time, the outer surface of the cone separator 302 is provided with an oleophilic and hydrophobic layer, and the floating oil layer 600 on the water surface is sucked into the water 500 to form an oil-water mixture, and the oleophilic and hydrophobic layer is used to collect oil droplets in the oil-water mixture; that is, the oleophilic and hydrophobic layer of the cone tip 3022 is used to collect oil droplets, and the oil droplets can be transported from the outer surface of the cone tip 3022 to the outer surface of the cone bottom 3021; ​​when the oil droplets are transported from the outer surface of the cone tip 3022 to the outer surface of the cone bottom 3021, the oil droplets will be collected in the gap between the outer surface of the cone bottom 3021 and the inner wall surface of the outer sleeve 301.

[0050] The oil-water separation device also includes an oil delivery mechanism 400, one end of which is connected to the side wall of each outer sleeve 301, and the other end of the oil delivery mechanism 400 is used to communicate with the oil storage tank; that is, the oil droplets collected in the gap between the outer surface of the cone bottom 3021 and the inner wall surface of the outer sleeve 301 will be transported to the oil delivery mechanism 400 through the side wall of the outer sleeve 301, and finally stored in the oil storage tank through the oil delivery mechanism 400, completing the oil-water separation and the extraction of the oil droplets.

[0051] The oil-water separation device of the embodiment of the present application has a suction mechanism 100 for being arranged in water 500, and the suction mechanism 100 is used to suck the floating oil layer 600 on the water surface into the water 500, and the support plate 200 is used to be horizontally immersed in the water 500, and a plurality of mounting through holes 201 are arranged on the support plate 200; the separation mechanism 300 includes a plurality of outer sleeves 301 and a plurality of conical separation members 302, and one end of each outer sleeve 301 is connected to a corresponding mounting through hole 201, and each outer sleeve 301 is connected to a corresponding mounting through hole 201. The other end of the sleeve 301 extends out of the water surface, the cone bottom 3021 of each conical separator 302 is arranged in an outer sleeve 301 with a corresponding clearance fit, and the cone tip 3022 of each conical separator 302 extends 500 into the water along one end of the outer sleeve 301; the outer surface of the conical separator 302 is provided with an oleophilic and hydrophobic layer; one end of its oil delivery mechanism 400 is connected to the side wall of each outer sleeve 301, and the other end of the oil delivery mechanism 400 is used to connect with the oil storage tank. The floating oil layer 600 on the water surface is sucked into the water 500 by the suction mechanism 100, and the oil-philic and hydrophobic wettability and curvature gradient characteristics of the multiple cone separators 302 with the cone tips pointing downward, as well as the buoyancy effect, are used to make the oil droplets 700 self-transported from bottom to top along the outer surface of the cone separators 302, thereby completing the collection of the above-water oil layer and the directional self-transportation of the oil droplets in the water; at the same time, multiple outer sleeves 301 are used to limit the spread of the collected oil droplets 700 along the water surface, ensuring that the oil droplets 700 are accumulated in the vertical direction and form the oil layer 701 to be output in the outer sleeve 301, and finally, the oil delivery mechanism 400 connected to each cone separator 302 is used to export the oil layer 701 to be output accumulated in the outer sleeve 301, thereby realizing the export of the above-water oil layer. Therefore, the oil-water separation device of the embodiment of the present application can realize the directional self-transportation of oil droplets in water, and the collection and discharge of oil layers above water; at the same time, the oil-water separation device has strong oil-water separation feasibility, high efficiency, and low energy consumption, and the directional self-transportation of oil droplets in water, and the collection and discharge of oil layers above water are all zero energy consumption processes.

[0052] Furthermore, the oil-water separation device of the embodiment of the present application has a simple structure, low investment and manufacturing costs, and generates no pollution during operation, and has prospects for industrial promotion and practical application.

[0053] It should be noted that when one end of each outer sleeve 301 is connected to a corresponding mounting through hole 201, one end of each outer sleeve 301 is embedded in a corresponding mounting through hole 201 to ensure that the outer sleeve 301 is fixed on the support plate 200; and the port at one end of each outer sleeve 301 is flush with the lower surface of the support plate 200 in the vertical direction to prevent the oil droplets not captured by the cone separator 302 from adhering to the outer wall surface of the outer sleeve 301. In other words, if one end of the outer sleeve 301 extends out of the support plate 200 from the mounting through hole 201 and is located in water, the oil droplets not captured by the cone separator 302 will adhere to the outer wall surface of the outer sleeve 301, resulting in that the oil droplets cannot be collected.

[0054] In the embodiment of the present application, the oil delivery mechanism 400 may include a plurality of horizontally arranged first export pipes 401, a plurality of horizontally arranged second export pipes 402 and a main oil delivery pipe 403. A first export pipe 401 is arranged between two adjacent outer casings 301 in the first direction (the horizontal direction shown in the figure), and both ends of each first export pipe 401 are connected to the side walls of the two adjacent outer casings 301, that is, all the outer casings 301 in the first direction (the horizontal direction shown in the figure) are connected through the first export pipe 401; the oil layer 701 to be exported accumulated in the outer casing 301 in the vertical direction will reach the plane where the first export pipe 401 is located after accumulating to a certain height, so that the oil layer 701 to be exported automatically enters the first export pipe 401, and the oil layer 701 to be exported after entering the first export pipe 401 will be transported from left to right.

[0055] At the same time, the main oil delivery pipe 403 can be arranged near the outer sleeve 301 at the rightmost edge position, one end of each second outlet pipe 402 is correspondingly connected to a side wall of the outer sleeve 301 near the main oil delivery pipe 403, and the other end of each second outlet pipe 402 is connected to the inlet of the main oil delivery pipe 403; the outlet of the main oil delivery pipe 403 is used to communicate with the oil storage tank. In other words, the oil layer 701 to be exported in the outer sleeve 301 in the first direction (the horizontal direction shown in the figure) will converge from left to right to the second outlet pipe 402, and will be transported to the main oil delivery pipe 403 by the second outlet pipe 402, and finally the oil layer 701 to be exported will be exported to the oil storage tank through the main oil delivery pipe 403.

[0056] The oil delivery mechanism 400 has high transportation efficiency, simple structure, and low investment and manufacturing costs.

[0057] It should also be noted that in the vertical direction, one-third to one-half of the length of the conical separator 302 is immersed in water for collecting and directionally transporting the oil droplets 700; one-quarter of the length of the outer sleeve 301 is immersed in water, and the remaining length extends out of the water; at the same time, it is also necessary to ensure that the water level in the outer sleeve 301 is lower than the plane where the first outlet pipe 401 is located to prevent the water in the outer sleeve 301 from overflowing into the first outlet pipe 401, resulting in failure of oil-water separation.

[0058] Optionally, the angle of the cone tip 3022 of the cone separator 302 is 4°-6°, the length of the cone separator 302 in the vertical direction is 20 mm, the immersion depth of the cone separator 302 in water can be 12-14 mm, preferably, the immersion depth of the cone separator 302 in water can be 10 mm. The immersion depth of the outer sleeve 301 in water can be 2-4 mm.

[0059] Optionally, the first outlet pipe 401 is 5 mm away from the top of the outer sleeve 301 extending out of the water surface.

[0060] In the above-mentioned embodiment of the present application, the diameter of the first outlet pipe 401 is smaller than the diameter of the outer sleeve 301. When the liquid level of the oil layer 701 to be output in the outer sleeve 301 is higher than the plane where the first outlet pipe 401 is located, the oil layer 701 to be output enters the first outlet pipe 401 under the pressure of the static oil and slides axially along the first outlet pipe 401.

[0061] In the above embodiment of the present application, the other end of the second outlet pipe 402 is formed as an arc-shaped pipe bent toward the main oil delivery pipe 403, and the arc-shaped pipe has a smooth inner wall surface to ensure the delivery efficiency of the oil layer 701 to be delivered.

[0062] In the above-mentioned embodiment of the present application, the oil delivery mechanism 400 may further include an oil delivery pump, which is arranged on the main oil delivery pipe 403. The oil delivery pump is used to suck the oil in the main oil delivery pipe 403 into the oil storage tank to avoid oil residue in the main oil delivery pipe 403; at the same time, the suction force of the oil delivery pump can also promote the flow of the oil layer in the first outlet pipe 401.

[0063] Optionally, one end of the main oil pipe 403 can be a closed port, and the other end of the main oil pipe 403 is used to connect to the oil storage tank; and the other end of the main oil pipe 403 is connected to an oil pump, and the oil in the main oil pipe 403 is concentrated and discharged to the oil storage tank through the suction force of the oil pump.

[0064] Alternatively, both ends of the main oil delivery pipe 403 are used to communicate with the oil storage tank, and the two oil delivery pumps are respectively connected to the two ends of the main oil delivery pipe 403 .

[0065] It should be noted that when the oil volume in the main oil delivery pipe 403 reaches a certain threshold, the oil delivery pump is turned on.

[0066] Optionally, the inner diameter of the main oil delivery pipe 403 may be 10 mm, the wall thickness of the main oil delivery pipe 403 may be 1 mm, and the length of the main oil delivery pipe 403 may be 80 mm.

[0067] In the embodiment of the present application, the suction mechanism 100 may include a suction port 101, a rotating blade ( Figure 3 The suction port 101 is vertically arranged upwards, and the suction port 101 is used to suck the floating oil layer 600 on the water surface; the suction port 101 and the discharge port 102 are connected, and the rotating blades are arranged between the suction port 101 and the discharge port 102. During the process of transporting the floating oil layer 600 from the suction port 101 to the discharge port 102, the rotating blades are used to break the floating oil layer 600 into oil droplets 700, and the discharge port 102 is used to discharge the oil droplets 700 into the water 500. Among them, the floating oil layer 600 on the water surface is a thin oil film, and the suction mechanism 100 can break the thin oil film into oil droplets 700. Compared with the thin oil film, the oil droplets 700 are more likely to adhere to the outer surface of the cone separator 302.

[0068] In the above embodiment of the present application, the suction mechanism 100 may include a submersible pump. When the oil-water separator of the embodiment of the present application performs separation operation, the submersible pump is located underwater. The submersible pump can prevent the air on the water surface from being sucked into the water to form bubbles, and prevent the bubbles from adhering to the outer surface of the cone separator 302, thereby ensuring that the outer surface of the cone separator 302 is an effective area capable of collecting oil droplets 700.

[0069] In the above-mentioned embodiment of the present application, the discharge port 102 can be arranged horizontally, and the discharge port 102 is close to the cone tip 3022 of the conical separator 302; that is, in the horizontal direction, the discharge port 102 and the cone tip 3022 are located in the same plane, so that the oil droplets 700 sprayed from the discharge port 102 can be as close to the cone tip 3022 as possible, thereby improving the separation efficiency of the oil-water separation device.

[0070] In the above-mentioned embodiment of the present application, the suction mechanism 100 may include multiple ones, and the multiple suction mechanisms 100 may be evenly spaced and arranged at different positions; and the discharge port 102 of each suction mechanism 100 is close to the cone tip 3022 of the conical separator 302, so as to further improve the separation efficiency of the oil-water separation device.

[0071] The specific operation process of the oil-water separation device of the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0072] Continue to refer Figure 3The suction mechanism 100 is located in the water 500, and the suction port 101 is vertically arranged upward. The suction port 101 sucks the floating oil layer 600 on the water surface into the suction mechanism 100. During the process of transporting the floating oil layer 600 from the suction port 101 to the discharge port 102, the rotating blades break the floating oil layer 600 into oil droplets 700, and the oil droplets 700 are sprayed into the water 500 through the discharge port 102.

[0073] Continue to refer Figure 4 Since the discharge port 102 is close to the cone tip 3022 of the cone separator 302, the sprayed oil droplets 700 are close to the cone tip 3022. The outer surface of the cone separator 302 is provided with an oleophilic and hydrophobic layer. According to the oleophilic and hydrophobic wettability of the oleophilic and hydrophobic layer and the curvature gradient characteristics of the cone separator 302, the oil droplets 700 will adhere to the outer surface of the cone tip 3022 and be self-transported from bottom to top along the outer surface of the cone tip 3022.

[0074] Continue to refer Figure 5 The oil droplets 700 are transported into the outer casing 301 , and gradually accumulate in the outer casing 301 along the vertical direction to form an oil layer 701 to be output, and the oil layer 701 to be output is located above the water layer 501 .

[0075] Continue to refer Figure 6 After the oil layer 701 to be exported accumulates to a certain height and reaches the plane where the first export pipe 401 is located, the oil layer 701 to be exported will automatically enter the first export pipe 401. After entering the first export pipe 401, the oil layer 701 to be exported will be transported to the next outer casing 301.

[0076] It should be noted that the water layer 501 accumulated in the outer sleeve 301 can prevent the oil layer 701 to be output from escaping from the port of the outer sleeve 301 (the port is connected to the installation through hole 201).

[0077] Please refer to Figure 7 and Figure 8 , Figure 7 and Figure 8 All of them are structural schematic diagrams of the support plate of the oil-water separation device provided in the embodiment of the present application. In the embodiment of the present application, a plurality of mounting through holes 201 are arranged in an array on the support plate 200 to ensure that the oil droplets 700 in each area of ​​the water 500 can be collected, thereby improving the separation efficiency of the oil-water separation device.

[0078] The support plate 200 may be a circular thin plate, and a plurality of mounting through holes 201 are arranged in a circular array on the support plate 200 ; the support plate 200 may also be a rectangular thin plate, and a plurality of mounting through holes 201 may also be arranged in a rectangular array on the support plate 200 .

[0079] The oil-water separation device of the embodiment of the present application will be described in detail by taking a rectangular thin plate and a rectangular array arrangement as an example.

[0080] refer to Figure 8 In the above embodiment of the present application, the rectangular plate includes four sides, and the suction mechanisms 100 may include four. The four suction mechanisms 100 are respectively arranged on the four sides of the rectangular plate to ensure that the cone tips 3022 in each area can collect the oil droplets 700, thereby improving the separation efficiency of the oil-water separation device. The suction mechanisms 100 may also include eight, and two suction mechanisms 100 are arranged on each side of the rectangular plate to be suitable for oil-water separation in a larger area.

[0081] Optionally, the size of the support plate 200 is 80 mm×80 mm, and the thickness of the support plate 200 is 2 mm; the diameter of the mounting through hole 201 may be 7 mm, and the distance between two adjacent mounting through holes 201 may be 10 mm.

[0082] In the embodiment of the present application, there is a gap 303 between the cone bottom 3021 of the cone separator 302 and the outer sleeve 301, and the gap 303 is used to communicate with the atmospheric environment, ensuring that the cavity between the cone separator 302 and the outer sleeve 301 is connected to the atmospheric environment, preventing the cavity from being closed and causing the oil layer to accumulate in the cavity. Failure, and at the same time, it can also prevent the water layer 501 under the oil from escaping from the port of the outer sleeve 301 (the port is connected to the mounting through hole 201), ensuring the normal separation of oil and water.

[0083] Optionally, the inner diameter of the outer sleeve 301 is 1-2 mm larger than the diameter of the cone bottom 3021 of the cone separator 302 .

[0084] In the above-mentioned embodiment of the present application, the other end of the outer sleeve 301 extends out of the water surface, and the side wall of the other end of the outer sleeve 301 may be provided with a vent hole, and the vent hole is used to communicate with the atmospheric environment.

[0085] In the above-mentioned embodiment of the present application, the other end of the outer sleeve 301 extends out of the water surface, and the port at the other end of the outer sleeve 301 can be set to a non-sealed state, and the port at the other end of the outer sleeve 301 is used to communicate with the atmospheric environment.

[0086] Please refer to Figure 2 and Fig. 9 , Figure 2 This is a schematic diagram of the top view of the oil-water separation device provided in an embodiment of the present application. Fig. 9 for Figure 2In the embodiment of the present application, the separation mechanism 300 may further include a plurality of connectors 304, and the connectors 304 are used to connect the outer sleeve 301 and the cone separator 302; wherein each connector 304 is correspondingly connected to a port at the other end of the outer sleeve 301, and the port at the other end of the outer sleeve 301 is also flush with the cone bottom 3021 of the cone separator 302, so that each connector 304 can also be connected to a cone bottom 3021.

[0087] That is, both ends of the connecting member 304 are respectively connected to the ports at the other end of the outer sleeve 301 , and the middle portion of the connecting member 304 is connected to the cone bottom 3021 of the cone separator 302 .

[0088] In the above embodiment of the present application, the connector 304 may include a connector strip, which is horizontally overlapped with the port at the other end of the outer sleeve 301, and the length of the connector strip ( Figure 5 The length in the horizontal direction shown in FIG) is greater than or equal to the outer diameter of the port at the other end of the outer sleeve 301, and the width of the connecting strip ( Figure 5 The width in the vertical direction shown in the figure is smaller than the outer diameter of the port at the other end of the outer sleeve 301, so that the connector 304 is used to connect the outer sleeve 301 and the cone separator 302 while ensuring that the port at the other end of the outer sleeve 301 is in a non-sealed state.

[0089] Optionally, the length of the connecting strip can be 7 mm, the width of the connecting strip can be 2 mm, and the thickness of the connecting strip can be 1 mm. Meanwhile, the inner diameter of the outer sleeve 301 is 5 mm, the outer diameter of the outer sleeve 301 can be 6 mm, the wall thickness of the outer sleeve 301 is 1 mm, and the length of the outer sleeve 301 in the vertical direction is 10 mm.

[0090] Furthermore, the outer sleeve 301, the first outlet pipe 401 and the support plate 200 may include one of quartz glass, polytetrafluoroethylene and organic glass.

[0091] The present application also provides a method for preparing a cone separator based on an electrolytic oxidation method, which comprises:

[0092] Step S1: pre-treating the copper wire, wherein the pre-treating includes:

[0093] Step S11: polish the copper wire with fine sandpaper to remove large impurities attached to the surface of the copper wire;

[0094] Step S12: using acetone, isopropanol, ethanol and other chemical reagents and deionized water to clean the copper wire by ultrasonic vibration for 5-15 minutes to remove organic impurities on its surface;

[0095] Step S13: Use diluted hydrochloric acid within a preset concentration range to clean the copper wire by ultrasonic vibration for 3-8 minutes to remove the oxide layer on its surface.

[0096] The copper wire may be a high-purity copper wire with a diameter of 1-3 mm, the fine sandpaper may be 500-1000 mesh fine sandpaper, and the preset concentration range may be 0.05-0.15 mol / L.

[0097] Step S2: one end of the pretreated copper wire is connected to the positive electrode of a DC power supply, and the other end is vertically immersed in a 0.1-0.5 mol / L copper sulfate aqueous solution.

[0098] Step S3: immersing the copper sheet connected to the negative electrode of the DC power supply into a copper sulfate aqueous solution to form a closed circuit; wherein the DC power supply voltage of the closed circuit is 8-12V.

[0099] Step S4: The copper wire is circulated in a copper sulfate aqueous solution for multiple times and vertically rises and falls at a uniform speed to obtain a copper-based cone separation piece; wherein the speed of vertical rise and vertical fall are both 0.05-0.15 mm / s, vertical rise and vertical fall constitute one cycle, and the number of cycles is 15-25 times, or 20-50 times.

[0100] Optionally, the cone tip angle of the copper-based cone separator may be 4°-6°, and the average surface roughness of the copper-based cone separator may be 0.20-0.25.

[0101] Step S5: Immerse the copper-based cone separator in a 1.5-3.5mmol / L octadecyl mercaptan ethanol solution at a preset time and a preset constant temperature; wherein the preset time may be 1-1.5h, and the preset constant temperature may be 60-80°C.

[0102] Step S6: using nitrogen to blow dry the surface of the copper-based cone separator to obtain a cone separator with a super oleophilic and hydrophobic surface.

[0103] refer to Fig.10 , Fig.10 A schematic diagram of the contact angles of oil droplets and water droplets provided in an embodiment of the present application. A conical separator is prepared by the above-mentioned embodiment of the present application. The contact angle of the water droplet 502 on the surface 3023 of the conical separator is: a=125.76°, and the contact angle of the oil droplet 700 on the surface 2023 of the conical separator is: b=2.36°.

[0104] It should be noted that the material for preparing the cone separator is not limited to copper, and an organic material with oleophilic and hydrophobic properties can also be used, and the cone separator can be prepared by a 3D printing method.

[0105] It should also be noted that adding micro-nano structures when preparing the conical separator can further enhance the oleophilic and hydrophobic wettability of the surface of the conical separator.

[0106] In summary, the embodiment of the present application provides an oil-water separation device, wherein the suction mechanism 100 is used to be arranged in the water 500, and the suction mechanism 100 is used to suck the floating oil layer 600 on the water surface into the water 500, and the support plate 200 is used to be horizontally immersed in the water 500, and the support plate 200 is provided with a plurality of mounting through holes 201; the separation mechanism 300 includes a plurality of outer sleeves 301 and a plurality of conical separation members 302, and one end of each outer sleeve 301 is connected to a mounting through hole 201 correspondingly. The other end of each outer sleeve 301 extends out of the water surface, the cone bottom 3021 of each conical separator 302 is arranged in an outer sleeve 301 with a corresponding clearance fit, and the cone tip 3022 of each conical separator 302 extends 500 into the water along one end of the outer sleeve 301; the outer surface of the conical separator 302 is provided with an oleophilic and hydrophobic layer; one end of its oil delivery mechanism 400 is connected to the side wall of each outer sleeve 301, and the other end of the oil delivery mechanism 400 is used to communicate with the oil storage tank. The floating oil layer 600 on the water surface is sucked into the water 500 by the suction mechanism 100, and the oil-philic and hydrophobic wettability and curvature gradient characteristics of the multiple cone separators 302 with the cone tips pointing downward are utilized to make the oil droplets 700 self-transported from bottom to top along the outer surface of the cone separators 302, thereby completing the collection of the oil layer above the water and the directional self-transportation of the oil droplets in the water; at the same time, the multiple outer sleeves 301 are utilized to limit the spread of the collected oil droplets 700 along the water surface, thereby ensuring that the oil droplets 700 accumulate in the vertical direction and form an oil layer 701 to be output in the outer sleeve 301; finally, the oil delivery mechanism 400 connected to each cone separator 302 is utilized to output the oil layer 701 to be output accumulated in the outer sleeve 301, thereby realizing the output of the oil layer above the water. Therefore, the oil-water separation device of the embodiment of the present application can realize the directional self-transportation of oil droplets in water, and the collection and discharge of oil layers above water; at the same time, the oil-water separation device has strong oil-water separation feasibility, high efficiency, and low energy consumption, and the directional self-transportation of oil droplets in water, and the collection and discharge of oil layers above water are all zero energy consumption processes.

[0107] Furthermore, the oil-water separation device of the embodiment of the present application has a simple structure, low investment and manufacturing costs, and generates no pollution during operation, and has prospects for industrial promotion and practical application.

[0108] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0109] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0110] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0111] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0112] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil-water separation device, characterized in that: include: Suction mechanism, support plate, separation mechanism and oil delivery mechanism; The suction mechanism is used to be arranged in water, and is used to suck the floating oil on the water surface into the water; the suction mechanism comprises a suction port, a rotating blade and a discharge port, the suction port is arranged vertically upward, and is used to suck the floating oil on the water surface; the suction port is connected to the discharge port, the rotating blade is arranged between the suction port and the discharge port, the rotating blade is used to break the floating oil into oil droplets, and the discharge port is used to discharge the oil droplets into the water; The support plate is used to be horizontally immersed in water, and a plurality of mounting through holes are provided on the support plate; The separation mechanism comprises a plurality of outer sleeves and a plurality of conical separators, one end of each of the outer sleeves is correspondingly connected to one of the mounting through holes, the other end of each of the outer sleeves extends out of the water surface, the cone bottom of each of the conical separators is correspondingly arranged in one of the outer sleeves with a clearance fit, and the cone tip of each of the conical separators extends into the water along one end of the outer sleeve; the outer surface of the conical separator is provided with an oleophilic and hydrophobic layer; One end of the oil delivery mechanism is communicated with the side wall of each of the outer sleeves, and the other end of the oil delivery mechanism is used to communicate with the oil storage tank.

2. The oil-water separation device according to claim 1, characterized in that: The oil delivery mechanism includes a plurality of first outlet pipes, a plurality of second outlet pipes and a main oil delivery pipe. A first outlet pipe is disposed between two adjacent outer casings in the first direction, and both ends of each first outlet pipe are correspondingly connected to the side walls of the two adjacent outer casings. One end of each of the second outlet pipes is correspondingly connected to a side wall of the outer sleeve close to the main oil pipeline, and the other end of each of the second outlet pipes is connected to the inlet of the main oil pipeline; The outlet of the main oil delivery pipe is used to communicate with the oil storage tank.

3. The oil-water separation device according to claim 1, characterized in that: A plurality of mounting through-hole arrays are arranged on the support plate.

4. The oil-water separation device according to claim 1, characterized in that: A gap is provided between the cone bottom of the cone separator and the outer sleeve, and the gap is used for communicating with the atmospheric environment.

5. The oil-water separation device according to claim 1, characterized in that: The separation mechanism further comprises a plurality of connectors, each of which is correspondingly connected to a port at the other end of the outer sleeve; The port at the other end of the outer sleeve is flush with the cone bottom of the cone separator, and each of the connecting members is correspondingly connected to one of the cone bottoms.

6. The oil-water separation device according to claim 5, characterized in that: The connecting member comprises a connecting strip, and the connecting strip is horizontally overlapped with a port at the other end of the outer sleeve; The length of the connecting strip is greater than or equal to the outer diameter of the port at the other end of the outer sleeve, and the width of the connecting strip is less than the outer diameter of the port at the other end of the outer sleeve.

7. The oil-water separation device according to claim 2, characterized in that: The diameter of the first outlet tube is smaller than the diameter of the outer sleeve.

8. The oil-water separation device according to claim 7, characterized in that: The other end of the second outlet pipe is formed as an arc-shaped pipe bent toward the main oil delivery pipe.

9. The oil-water separation device according to claim 1, characterized in that: The discharge port is arranged horizontally and is close to the cone tip of the cone separator.

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