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 invention relates to the technical field of oil-water separation, and in particular to a multi-stage oil-water separation device with double-repellent 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 been greatly developed. With the expansion of offshore oil field production, how to quickly separate oil and water has become an urgent problem to be solved. Offshore oil production platforms are offshore work platforms built with steel or concrete, or a mixture of the two, for offshore oil production operations. The structural form of offshore oil production platforms varies with shallow or deep seas and the methods of offshore oil and gas gathering and production. They are generally distinguished according to their manufacturing materials and characteristics. There are pile steel or concrete, or a mixture of the two, and hybrid platforms, etc. The oil-water separation device is an important equipment in oil production;

[0003] However, the existing oil-water separation device usually uses only one hydrophobic and oleophilic material to adsorb crude oil. It cannot ensure that the crude oil is completely absorbed during adsorption, resulting in crude oil still remaining in the discharged water. In order to solve the above problem, a multi-stage oil-water separation device with double hydrophobic separation function is proposed. Summary of the invention

[0004] According to the above existing technical problems, the present invention 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 tank, a water leakage hole, a water outlet, an upper box, an oil separation tank, 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 tank is provided in the lower box, the feed spray pipe is provided in the water separation tank, the cyclone is provided in the water separation tank, the water leakage hole is provided in the water separation tank, the water outlet is provided on the lower box, the upper box is provided on the lower box, the oil separation tank is provided in the upper box, the oil leakage hole is provided on the oil separation tank, 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 tank is conical, the lower box and the outer side of the water diversion tank have cavities, a cyclone is arranged at the bottom of the water diversion tank, the cyclone is controlled by a motor under the separation tank, the feed spray pipe is connected to the external pipeline, and is located at the bottom of the water diversion tank. The flow field in the tank body is numerically simulated using computational fluid dynamics software, and the tank size, the angle of the cone, the outlet direction of the spray pipe, and the structure and speed parameters of the cyclone can be optimized to obtain an ideal separation effect;

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

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

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

[0010] Beneficial effects of the present invention:

[0011] The present invention injects an oil-water mixture into a water separation tank from a feed spray pipe, and controls a cyclone to disturb the mixture. 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. 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 to complete 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 It 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 structure of a multi-stage oil-water separation device with double-repellent separation function according to the present invention;

[0015] Figure 4 It is a schematic cross-sectional structure diagram of a multi-stage oil-water separation device with double-phobic 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 tank, 6 water leakage hole, 7 water outlet, 8 upper box body, 9 oil distribution tank, 10 oil leakage hole, 11 oil outlet, 12 box cover. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood 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 the internal connection of 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 present invention 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 arranged 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, the water distribution tank 5 is conical, and there is a cavity on the outer side of the lower box 2 and the water distribution tank 5. A cyclone 4 is arranged at the bottom of the water distribution tank 5, and the cyclone 4 is controlled by a motor under the separation tank 1. The feed spray pipe 3 is connected to the external pipeline and is located at the bottom of the water distribution tank 5. The flow field in the tank body is numerically simulated using computational fluid dynamics software, and the tank size, the angle of the cone, the outlet direction of the spray pipe, and the structure and speed parameters of the cyclone can be optimized to obtain an ideal separation effect;

[0023] Furthermore, a plurality of water leakage holes 6 are provided on the side wall of the conical water dividing groove 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 outside the lower box body 2 and the water dividing groove 5, and the water outlet 7 is located on the side wall of the lower box body 2, and a valve is provided on the water outlet 7;

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

[0025] Furthermore, there are two separation tanks 1, which are arranged in parallel, wherein 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, and 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 water 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 water 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 body 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 and main features of the present invention and the 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 only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

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

2. A multi-stage oil-water separation device with double-repellent separation function according to claim 1, characterized in that: The lower box is barrel-shaped, the water distribution tank is conical, there is a cavity on the outside of the lower box and the water distribution tank, a cyclone is arranged at the bottom of the water distribution tank, the cyclone is controlled by a motor under the separation tank, and 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 double-repellent separation function according to claim 2, characterized in that: There are several leakage holes on the side wall of the conical water diversion trough, and hydrophilic and oleophobic materials are arranged on the 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 there is a valve on the water outlet.

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