Multi-stage oil-water separation device with amphiphobic separation function

Abstract

A multistage oil-water separation device with an amphiphobic separation function is characterized by comprising a separation tank, a lower box body and an upper box body are arranged in the separation tank, a water diversion tank is arranged in the lower box body, and a feeding spray pipe and an electric cyclone are arranged in the water diversion tank; an oil-water mixture is injected into the water diversion tank from the feeding spraying pipe, the swirler is controlled to disturb the mixture, and oil in the mixture is blocked by a hydrophilic oleophobic material on the water leakage hole, is left in the water diversion tank and enters the upper box body. An oil separation groove is formed in the upper box body, a hydrophobic oleophylic material and an oil leakage hole are arranged on the conical surface of the oil filtering groove, oil in an oil-water mixture flowing in from the lower box body can be separated, and the separated oil reaches the upper box body and a cavity in the outer side of the oil filtering groove and is collected to an oil outlet. The water separated by the first stage possibly contains a small amount of oil, and multi-stage oil-water separation can be carried out by adopting the same structure, so that the separation purity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-water separation, in particular to a multi-stage oil-water separation device with double-phobic separation function. Background Art

[0002] With the development of oil production technology and the gradual depletion of onshore oil fields, offshore oil production technology has made great progress. As the amount of offshore oil production increases, how to quickly separate oil and water has become an urgent problem to be solved. Offshore oil platforms are offshore work platforms constructed using steel or concrete, or a mixture of the two, and are used for offshore oil production operations. The structure of offshore oil platforms varies depending on whether the platform is shallow or deep sea, as well as the method of offshore oil and gas gathering and production. Generally, they are divided according to their manufacturing materials and characteristics. There are piled steel or concrete, or a mixture of the two, and hybrid platforms. The oil-water separation device is a key equipment in oil production.

[0003] However, existing oil-water separation devices usually only use one hydrophobic and oleophilic material to adsorb crude oil. During adsorption, it cannot guarantee that the crude oil is completely absorbed, resulting in crude oil still remaining in the discharged water. To solve the above problem, a multi-stage oil-water separation device with dual hydrophobic separation function is proposed. Utility Model Content

[0004] In response to the above technical problems, the utility model provides a multi-stage oil-water separation device with a double-repellent separation function, which is characterized by comprising a separation tank, a lower box, a feed spray pipe, a cyclone, a water separation trough, a water leakage hole, a water outlet, an upper box, an oil separation trough, an oil leakage hole, an oil outlet, and a box cover. The lower box is provided at the bottom of the separation tank, the water separation trough is provided in the lower box, the feed spray pipe is provided in the water separation trough, the cyclone is provided in the water separation trough, the water leakage hole is provided in the water separation trough, the water outlet is provided on the lower box, the upper box is provided on the lower box, the oil separation trough is provided in the upper box, the oil leakage hole is provided on the oil separation trough, the oil outlet is provided on the upper box, and the box cover is provided on the upper box;

[0005] Furthermore, the lower box is barrel-shaped, the water diversion trough is conical, and there is a cavity between the lower box and the outer side of the water diversion trough. A cyclone is provided at the bottom of the water diversion trough, and the cyclone is controlled by a motor below the separation tank. The feed spray pipe is connected to the external pipeline and is located at the bottom of the water diversion trough. Computational fluid dynamics software is used to perform numerical simulation of the flow field in the tank, and the tank size, cone angle, spray pipe outlet direction, and cyclone structure and speed parameters can be optimized to achieve an ideal separation effect.

[0006] Furthermore, a plurality of water leakage holes are provided on the side wall of the conical water diversion trough, and a hydrophilic and oleophobic material is provided on the plurality of water leakage holes. The water outlet is located in the cavity outside the lower box and the water diversion trough, and the water outlet is located on the side wall of the lower box, and a valve is provided on the water outlet.

[0007] Furthermore, the upper box body is barrel-shaped, the upper box body and the lower box body are buckled together, and an annular sealing ring is provided at the connection; the oil separation tank is in the shape of an inverted truncated cone, a plurality of oil leakage holes are provided on the side wall of the oil separation tank, an opening is provided on the bottom surface of the oil separation tank, and an oleophilic and hydrophobic material is provided on the surface of the oil leakage holes and the opening on the bottom surface of the oil separation tank; the oil outlet is located in the cavity outside the upper box body and the oil separation tank, the oil outlet is located on the side wall of the upper box body, and a valve is provided on the oil outlet;

[0008] Furthermore, there are two separation tanks, which are arranged in parallel, with the water outlet of one separation tank connected to the feed spray pipe of the other separation tank, and the oil outlets of the two separation tanks are connected to the external oil pipeline;

[0009] Furthermore, the upper box body and the lower box body are both made of metal.

[0010] Beneficial effects of the utility model:

[0011] The utility model injects an oil-water mixture into the water separation tank from a feed spray pipe, and controls the cyclone to disturb the mixture, and the water in the mixture passes through the hydrophilic and oleophobic material and the water leakage hole to reach the cavity outside the lower box and the water separation tank, and enters the feed spray pipe of another separation tank through the water outlet for secondary separation, and the oil in the mixture is blocked by the hydrophilic and oleophobic material on the water leakage hole and remains in the water separation tank. When the liquid level continues to rise along the conical surface, the oil passes through the oleophilic and hydrophobic material at the bottom of the oil separation tank, and again passes through the oil leakage hole and the oleophilic and hydrophobic material on the side wall of the oil separation tank to enter the cavity outside the upper box and the oil separation tank, and is discharged to the outside through the oil outlet, completing the separation. The oil-water mixture is treated with multiple layers of hydrophobic and oleophilic materials and hydrophilic and oleophobic materials to separate the oil-water mixture cleanly. At the same time, multi-stage separation can be performed according to actual usage to ensure clean separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a multi-stage oil-water separation device with double-repellent separation function according to the present invention;

[0013] Figure 2 This is a schematic diagram of the internal structure of a multi-stage oil-water separation device with double-repellent separation function according to the present invention;

[0014] Figure 3 This is a schematic diagram of the internal top view of a multi-stage oil-water separation device with dual-hydrophobic separation function according to the present invention;

[0015] Figure 4 This is a schematic cross-sectional view of a multi-stage oil-water separation device with dual-hydrophobic separation function according to the present invention;

[0016] As shown in the figure: 1 separation tank, 2 lower box body, 3 feed spray pipe, 4 cyclone, 5 water distribution trough, 6 water leakage hole, 7 water outlet, 8 upper box body, 9 oil distribution trough, 10 oil leakage hole, 11 oil outlet, 12 box cover. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Example 1

[0021] The utility model provides a multi-stage oil-water separation device with a double-repellent separation function, which is characterized by comprising a separation tank 1, a lower box body 2, a feed spray pipe 3, a cyclone 4, a water separation tank 5, a water leakage hole 6, a water outlet 7, an upper box body 8, an oil separation tank 9, an oil leakage hole 10, an oil outlet 11, and a box cover 12. The lower box body 2 is arranged at the bottom of the separation tank 1, the water separation tank 5 is arranged in the lower box body 2, the feed spray pipe 3 is arranged in the water separation tank 5, the cyclone 4 is arranged in the water separation tank 5, the water leakage hole 6 is arranged in the water separation tank 5, the water outlet 7 is arranged on the lower box body 2, the upper box body 8 is arranged on the lower box body 2, the oil separation tank 9 is arranged in the upper box body 8, the oil leakage hole 10 is provided on the oil separation tank 9, the oil outlet 11 is arranged on the upper box body 8, and the box cover 12 is arranged on the upper box body 8;

[0022] Furthermore, the lower box 2 is barrel-shaped, and the water distribution trough 5 is conical. A cavity is formed on the outside of the lower box 2 and the water distribution trough 5. A cyclone 4 is provided at the bottom of the water distribution trough 5. The cyclone 4 is controlled by a motor below the separation tank 1. The feed spray pipe 3 is connected to an external pipeline and is located at the bottom of the water distribution trough 5. Computational fluid dynamics software is used to perform numerical simulation of the flow field within the tank. This allows for optimization of the tank size, cone angle, spray pipe outlet direction, and cyclone structure and speed parameters to achieve an ideal separation effect.

[0023] Furthermore, a plurality of water leakage holes 6 are provided on the side wall of the conical water diversion trough 5, and a hydrophilic and oleophobic material is provided on the plurality of water leakage holes 6. A water outlet 7 is located in the cavity between the lower box body 2 and the outer side of the water diversion trough 5. The water outlet 7 is located on the side wall of the lower box body 2 and has a valve.

[0024] Furthermore, the upper box body 8 is barrel-shaped, and the upper box body 8 is buckled with the lower box body 2, with an annular sealing ring at the connection. The oil distribution tank 9 is in the shape of an inverted truncated cone, and a plurality of oil leakage holes 10 are provided on the side wall of the oil distribution tank 9. The bottom surface of the oil distribution tank 9 has an opening. The surface of the oil leakage hole 10 and the opening on the bottom surface of the oil distribution tank 9 are coated with an oleophilic and hydrophobic material. The oil outlet 11 is located in the cavity outside the upper box body 8 and the oil distribution tank 9. The oil outlet 11 is located on the side wall of the upper box body 8, and there is a valve on the oil outlet 11.

[0025] Furthermore, there are two separation tanks 1, which are arranged in parallel, and the water outlet 7 of one separation tank 1 is connected to the feed spray pipe 3 of the other separation tank 1, and the oil outlets 11 of the two separation tanks 1 are connected to the external oil pipeline;

[0026] Furthermore, the upper box body 8 and the lower box body 2 are both made of metal.

[0027] Example 2

[0028] When in use, the upper box body 8 is buckled onto the lower box body 2, and the upper box body 8 is sealed by its own gravity and the sealing ring. At this time, the water separation tank 5 and the oil separation tank 9 form a complete conical space. There is a layer of oleophilic and hydrophobic material between the water separation tank 5 and the oil separation tank 9. The oil-water mixture is injected into the water separation tank 5 from the feed spray pipe 3, and the cyclone 4 is controlled to disturb the mixture. The water in the mixture passes through the hydrophilic and oleophobic material and the leakage hole 6 to reach the space outside the lower box body 2 and the water separation tank 5. The oil in the mixture is blocked by the hydrophilic and oleophobic material on the leakage hole 6 and remains in the water separation tank 5. When the liquid level continues to rise along the conical surface, the oil passes through the oleophilic and hydrophobic material at the bottom of the oil separation tank 9, and again passes through the oil leakage hole 10 and the oleophilic and hydrophobic material on the side wall of the oil separation tank 9 into the cavity outside the upper box 8 and the oil separation tank 9 and is discharged to the outside through the oil outlet 11, completing the separation.

[0029] Both oleophilic and hydrophobic materials and hydrophilic and oleophobic materials are existing materials.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. The various components mentioned in the present invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage oil-water separation device with double-repellent separation function, characterized in that: It includes a separation tank, a lower box body, a feed spray pipe, a cyclone, a water distribution tank, a water leakage hole, a water outlet, an upper box body, an oil distribution tank, an oil leakage hole, an oil outlet, and a box cover. The lower box body is provided at the bottom of the separation tank, the water distribution tank is provided in the lower box body, the feed spray pipe is provided in the water distribution tank, the cyclone is provided in the water distribution tank, the water leakage hole is provided in the water distribution tank, the water outlet is provided on the lower box body, the upper box body is provided on the lower box body, the oil distribution tank is provided in the upper box body, the oil leakage hole is provided on the oil distribution tank, the oil outlet is provided on the upper box body, and the box cover is provided on the upper box body.

2. The multi-stage oil-water separation device with dual-repellent separation function according to claim 1, characterized in that: The lower box body is barrel-shaped, the water distribution tank is conical, and there is a cavity on the outside of the lower box body and the water distribution tank. A cyclone is set at the bottom of the water distribution tank, and the cyclone is controlled by a motor below the separation tank. The feed spray pipe is connected to the external pipeline and is located at the bottom of the water distribution tank.

3. The multi-stage oil-water separation device with dual-repellent separation function according to claim 2, characterized in that: There are several leakage holes on the side wall of the conical water distribution trough, and hydrophilic and oleophobic materials are provided on the leakage holes. The water outlet is located in the cavity outside the lower box and the water distribution trough. The water outlet is located on the side wall of the lower box and has a valve.

4. The multi-stage oil-water separation device with dual-repellent separation function according to claim 3, characterized in that: The upper box body is barrel-shaped, and the upper box body is buckled with the lower box body, and there is an annular sealing ring at the connection. The oil separation tank is in the shape of an inverted truncated cone, and there are several oil leakage holes on the side wall of the oil separation tank. The bottom surface of the oil separation tank has an opening, and the surface of the oil leakage hole and the bottom surface opening of the oil separation tank are provided with oleophilic and hydrophobic materials. The oil outlet is located in the cavity outside the upper box body and the oil separation tank, and the oil outlet is located on the side wall of the upper box body, and there is a valve on the oil outlet.

5. The multi-stage oil-water separation device with dual-repellent separation function according to claim 4, characterized in that: There are two separation tanks, which are arranged in parallel. The water outlet of one separation tank is connected to the feed spray pipe of the other separation tank, and the oil outlets of the two separation tanks are connected to external oil pipelines.

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