Three-phase multi-stage separator for petroleum and natural gas

Abstract

The utility model provides a three-phase multi-stage separator for petroleum and natural gas, and belongs to the technical field of three-phase separators. Comprising a shell, a plurality of rectiblocks are arranged in the shell at intervals and divide the shell into a liquid inlet chamber, a layering chamber and a discharge chamber, the liquid inlet chamber of the shell is connected with an oil inlet pipe, the discharge chamber is internally connected with a water outlet pipe through a water separation assembly, and the bottom wall of the end, away from the oil inlet pipe, of the shell in the discharge chamber is connected with an oil outlet pipe; a gas collecting cylinder with the top connected with a gas outlet pipe is fixedly arranged on the shell and located at the top of the discharge chamber, a demister is arranged in the gas collecting cylinder, a water retaining cap and a water collecting ring are sequentially arranged in the gas collecting cylinder and located under the demister, a drainage pipe is connected to the bottom of the water collecting ring, and one end of the drainage pipe extends to the bottom of the shell. Condensation on the demister can be blocked through the water retaining cap, is guided to the water collecting ring and enters a water layer at the bottom of the shell through the drainage pipe, so that water drops can be effectively prevented from falling into a petroleum layer, and the oil-water separation device has the advantage of improving the oil-water separation effect.

Description

Technical Field

[0001] This utility model relates to the field of three-phase separator technology, and in particular to a three-phase multi-stage separator for use in oil and natural gas. Background Technology

[0002] A three-phase oil and gas separator is a key device used to separate the mixed fluid produced by an oil well into crude oil, natural gas, and water.

[0003] Patent CN220413268U discloses a three-phase multi-stage oil separator, including a housing with a three-phase separation structure inside. An inlet is located on the left wall of the housing. A filter cartridge is placed inside the inlet pipe. A fixing plate is installed on the left wall of the filter cartridge. A pair of mounting plates are installed on the outer wall of the housing, and the fixing plate is fixed to the mounting plates by a pair of bolts. A distributor is installed on the inlet pipe inside the housing. A drain outlet is located on the lower wall of the housing, and a drain pipe is installed on the drain outlet on the lower wall of the housing. A drain pipe is located to the right of the drain pipe on the lower wall of the housing. A baffle is installed on the lower inner wall of the housing, located to the right of the drain pipe. An oil outlet is located on the lower wall of the housing. A pair of vortex eliminators are installed on the lower wall of the housing, and another pair of vortex eliminators are located on the drain pipe and the oil outlet. An exhaust assembly is provided on the housing.

[0004] A demister is usually installed on the exhaust pipe of a three-phase separator to dry the separated natural gas. However, the exhaust pipe is generally located in the downstream oil-water separation chamber of the separator. Water droplets separated from the natural gas by the demister will drip onto the oil-water surface below. The water droplets do not have enough time to settle and separate, which can easily cause water droplets to mix into the crude oil discharged from the separator, affecting the separation effect of the oil. Utility Model Content

[0005] In view of the above problems, this utility model provides a three-phase multi-stage separator for use in oil and natural gas.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A three-phase multi-stage separator for oil and natural gas is provided, comprising a shell, with a plurality of rectifier plates spaced apart inside the shell, dividing the shell into an inlet chamber, a stratification chamber, and a discharge chamber. One end of the shell is connected to an oil inlet pipe communicating with the inlet chamber. A water separation component is provided in the discharge chamber for separating passing water. A water outlet pipe is provided on the shell and connected to the water separation component. An oil outlet pipe is connected to the bottom wall of the end of the shell away from the oil inlet pipe. A gas collecting cylinder is fixedly installed on the shell at the top of the discharge chamber. A demister is installed inside the gas collecting cylinder. An outlet pipe is connected to the top of the gas collecting cylinder. A water baffle is provided inside the gas collecting cylinder directly below the demister. A gap is provided between the water baffle and the gas collecting cylinder for natural gas to pass through. A water collecting ring is coaxially arranged on the inner wall of the gas collecting cylinder. A drain pipe is connected to the bottom of the water collecting ring. The end of the drain pipe away from the water collecting ring extends to the bottom of the shell.

[0008] Furthermore, the drain pipe extends to the liquid inlet chamber.

[0009] Furthermore, the water separation component includes a baffle plate disposed in the discharge chamber. A drainage chamber is integrally and sealed to one side of the baffle plate. A connecting pipe is vertically disposed in the drainage chamber. The top of the connecting pipe extends to the top of the housing and is open. A water inlet pipe is connected to the bottom of the connecting pipe. The water inlet pipe is close to the bottom of the housing and extends into the drainage chamber. A valve for opening and closing the water inlet pipe is disposed on the water inlet pipe. A water outlet is disposed on the connecting pipe. The water outlet is located in the drainage chamber. An oil-water separation membrane is disposed in the water outlet. The water outlet pipe is connected to the drainage chamber.

[0010] Furthermore, the oil inlet pipe is horizontally connected to the housing, and a baffle is fixedly installed on the outside of the oil inlet pipe outlet end inside the housing. A water divider is fixedly installed on the lower edge of the baffle facing the oil inlet pipe. The end of the water divider away from the baffle is inclined downwards, and the water divider is inclined from the middle to both sides. Several through holes are opened through the water divider.

[0011] Furthermore, an air passage is provided between the rectifier and the top wall of the housing, and a condensation grid is provided in the air passage.

[0012] Furthermore, a support plate is provided on the side of the rectifier blade near the oil inlet pipe, and a condensation grille is provided between the support plate and the top wall of the casing. Several return water holes are provided through the support plate.

[0013] The beneficial effects of this utility model are as follows: In the process of oil and gas extraction, crude oil enters the separator shell from the inlet pipe. After passing through multiple rectifier plates, the oscillation of crude oil in the shell can be reduced step by step. During the process of crude oil passing through the rectifier plates, the crude oil is divided into an upper oil layer and a lower water layer. The water layer is discharged from the outlet pipe through the water separation component. The remaining oil in the oil layer is discharged from the oil outlet pipe. After the natural gas in the crude oil is input into the shell, it is discharged from the gas collecting cylinder through the demister to the outlet pipe. When the water droplets condensed on the demister fall downwards, they drip onto the water baffle cap. After being guided by the water baffle cap, they flow into the water collecting ring and then enter the water layer at the bottom of the shell through the drain pipe. This can effectively prevent water droplets from falling into the oil layer and improve the oil-water separation effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a three-phase multistage separator according to an embodiment of this application.

[0015] Figure 2 for Figure 1 A magnified view of part A in the diagram.

[0016] The components are as follows: 1. Shell; 11. Liquid inlet chamber; 12. Layered chamber; 13. Discharge chamber; 14. Oil inlet pipe; 15. Water outlet pipe; 16. Oil outlet pipe; 17. Gas outlet pipe; 2. Rectifier plate; 3. Gas collection cylinder; 31. Water baffle cap; 32. Water collection ring; 33. Drain pipe; 4. Demister; 5. Water separation assembly; 51. Water baffle plate; 52. Drain chamber; 53. Water inlet pipe; 54. Connecting pipe; 55. Valve; 56. Water outlet hole; 6. Baffle plate; 7. Water distribution plate; 8. Condensation grid; 81. Support plate. Detailed Implementation

[0017] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0018] This application discloses a three-phase multi-stage separator for use in oil and gas, referring to... Figure 1 and Figure 2 The system includes a housing 1, within which several rectifier plates 2 are spaced apart. The lower edge of each rectifier plate 2 is completely flush with the bottom wall of the housing 1, while the upper edge of each rectifier plate 2 leaves an air passage between it and the top wall of the housing 1. Several rectifier holes are densely arranged on each rectifier plate 2, which forces the oil to flow smoothly downstream. The rectifier plates 2 divide the interior of the housing 1 into an inlet chamber 11, a stratification chamber 12, and an outlet chamber 13. The multiple rectifier plates 2 are all located within the stratification chamber 12, while the inlet chamber 11 and the outlet chamber 13 are located on opposite sides of the rectifier plate 2 group.

[0019] One end of the housing 1 is connected to an oil inlet pipe 14 that connects to the liquid inlet chamber 11. A water separation component 5 is installed in the discharge chamber 13 to separate passing water. A water outlet pipe 15 connected to the water separation component 5 is installed on the housing 1. An oil outlet pipe 16 is connected to the bottom wall of the end of the housing 1 away from the oil inlet pipe 14. A gas collecting cylinder 3 is integrally fixed to the top of the housing 1 at the discharge chamber 13. A demister 4 is installed inside the gas collecting cylinder 3. An air outlet pipe 17 is connected to the top of the gas collecting cylinder 3. The demister 4 is composed of multiple layers of metal mesh, which can effectively adsorb and condense moisture in the passing gas.

[0020] In this embodiment, a water baffle cap 31 is provided inside the gas collecting cylinder 3 directly below the demister 4. A gap for natural gas to pass through is provided between the water baffle cap 31 and the gas collecting cylinder 3. A water collecting ring 32 is coaxially arranged on the inner wall of the gas collecting cylinder 3. A drain pipe 33 is connected to the bottom of the water collecting ring 32, and the end of the drain pipe 33 away from the water collecting ring 32 extends to the bottom of the housing 1. When water droplets condensed on the demister 4 drip downwards, the water droplets fall onto the water baffle cap 31, which is a cone with its tip pointing upwards. After being guided on the water baffle cap 31, the water droplets drip downwards from the gap between the water baffle cap 31 and the gas collecting cylinder 3. The inner diameter of the water collecting ring 32 is smaller than the outer diameter of the water baffle cap 31. The top wall of the water collecting ring 32 is combined with the inner wall of the air collecting cylinder 3 to form an annular water collecting groove. The water baffle cap 31 and the water collecting ring 32 are spaced apart, and the water baffle cap 31 and the water collecting ring 32 are fixedly connected by a support rod. Water droplets on the water baffle cap 31 fall into the water collecting groove on the water collecting ring 32 and are collected. The collected water is then discharged directly to the lower layer of the oil layer inside the shell 1 through the drain pipe 33, which avoids water droplets falling to the upper oil layer and improves the stratification effect between the oil layer and the water layer.

[0021] Furthermore, the bottom end of the drain pipe 33 can extend to the liquid inlet chamber 11, and the water collected in the water collection tank can be centrally discharged into the liquid inlet chamber 11, reducing the disturbance to the oil and water in the stratification chamber 12 and improving the stratification effect between the oil layer and the water layer.

[0022] In this embodiment, the water separation component 5 includes a baffle plate 51, a connecting pipe 54, and an inlet pipe 53. The baffle plate 51 is fixedly installed in the discharge chamber 13. An oil passage gap is formed between the top edge of the baffle plate 51 and the inner wall of the housing 1, allowing oil to overflow downstream at the oil passage gap. A drain chamber 52 is integrally sealed to one side of the baffle plate 51. A connecting pipe 54 is vertically installed in the drain chamber 52. The top end of the connecting pipe 54 passes through the drain chamber 52 and enters the housing 1, extending to a position near the top of the housing 1. The top of the connecting pipe 54 is open. A water inlet pipe 53 is connected to the bottom end of the connecting pipe 54. The other end of the water inlet pipe 53 extends horizontally into the housing 1, located on the side of the baffle plate 51 near the rectifier plate, and is installed through the baffle plate. A valve 55 is provided on the water inlet pipe 53. The valve 55 is an electronic valve. Multiple water outlet holes 56 are provided on the outer wall of the connecting pipe 54 located in the drain chamber 52. An oil-water separation membrane is provided in the water outlet hole 56. The water outlet pipe 15 is connected to the bottom wall of the housing 1 and connects to the drain chamber 52.

[0023] During operation, the crude oil in the shell 1 is divided into an upper oil layer and a lower water layer. The water inlet pipe 53 is located in the water layer. After the valve 55 is opened, the water in the water layer enters the connecting pipe 54 through the water inlet pipe 53 under pressure and rises. The water in the connecting pipe 54 is discharged into the drain chamber 52 through the water outlet 56. The oil-water separation membrane at the water outlet 56 can further ensure that the water entering the drain chamber 52 is clean water. The water collected in the drain chamber 52 is discharged through the water outlet pipe 15.

[0024] Furthermore, a baffle 6 is fixedly installed on the outer side of the oil inlet pipe 14 located inside the casing 1. A water separator 7 is fixedly connected to the lower edge of the baffle 6 facing the oil inlet pipe 14. The end of the water separator 7 away from the baffle 6 is inclined downwards, and the water separator 7 is inclined from the middle to both sides. Several perforations are opened through the water separator 7. The baffle 6 can vertically block the crude oil entering the casing 1, preventing the crude oil from directly impacting the rectifier plate and causing the rectifier plate to lose its rectifying function. At the same time, the baffle 6 can disperse the impacting crude oil, facilitating the escape of natural gas. The water separator 7 and its perforations can further disperse the crude oil and improve the natural gas escape efficiency.

[0025] Furthermore, a condensing grid 8 can be installed at the gas passage at the top of the rectifier plate 2. The condensing grid 8 is composed of multiple spaced grid plates. The grid plates are vertically arranged and the surface of the grid plates is zigzag along the axial direction of the gas passage. The grid plates increase the path length of the gas passing through the housing 1 and increase the contact area between the grid plates and the housing 1, which can adsorb and remove some of the water vapor in the natural gas and reduce the water removal burden of the demister 4.

[0026] Furthermore, a support plate 81 can be horizontally and integrally fixed on the side of the upper edge of the rectifier plate 2 near the oil inlet pipe 14. The condensing grille 8 is set between the support plate 81 and the inner top wall of the housing 1. The support plate 81 effectively supports the weight of the condensing grille 8. Several water return holes are opened through the support plate 81 so that the water droplets condensed on the condensing grille 8 can fall through.

[0027] Those skilled in the art will understand that although preferred embodiments of the present invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and modifications.

Claims

1. A three-phase multi-stage separator for use in oil and gas, characterized by: The utility model provides a natural gas water separation device, which comprises a shell (1), a plurality of rectifier blades (2) are arranged in the shell (1) at intervals, the shell (1) is divided into a liquid inlet chamber (11), a layering chamber (12) and a discharge chamber (13) by the rectifier blades (2), one end of the shell (1) is connected with an oil inlet pipe (14) communicating with the liquid inlet chamber (11), a water separation assembly (5) is arranged in the discharge chamber (13) for separating water, a water outlet pipe (15) connected with the water separation assembly (5) is arranged on the shell (1), an oil outlet pipe (16) is connected to the bottom wall of the end of the shell (1) away from the oil inlet pipe (14), a gas collecting cylinder (3) is fixedly arranged on the top of the discharge chamber (13) of the shell (1), a demister (4) is arranged in the gas collecting cylinder (3), a gas outlet pipe (17) is connected to the top of the gas collecting cylinder (3), a water blocking cap (31) is arranged directly below the demister (4) in the gas collecting cylinder (3), a gap for natural gas passing through is arranged between the water blocking cap (31) and the gas collecting cylinder (3), a water collecting ring (32) is coaxially arranged on the inner wall of the gas collecting cylinder (3), and a drain pipe (33) is connected to the bottom of the water collecting ring (32) and extends to the bottom of the shell (1).

2. A three-phase multi-stage separator for use in oil and gas according to claim 1, characterized in that, The drain pipe (33) extends to the liquid inlet chamber (11).

3. A three-phase multi-stage separator for use in oil and gas according to claim 2, characterized in that, The water separation assembly (5) comprises a water blocking plate (51) arranged in the discharge chamber (13), one side of the water blocking plate (51) is integrally and sealingly connected with a drain chamber (52), the drain chamber (52) is vertically provided with a communicating pipe (54), the top of the communicating pipe (54) extends to the top in the shell (1) and is open, the bottom of the communicating pipe (54) is connected with a water inlet pipe (53), the water inlet pipe (53) is close to the bottom of the shell (1) and extends into the drain chamber (52), a valve (55) for opening and closing the water inlet pipe (53) is arranged on the water inlet pipe (53), a water outlet hole (56) is formed in the communicating pipe (54), the water outlet hole (56) is located in the drain chamber (52), an oil-water separation membrane is arranged in the water outlet hole (56), and the water outlet pipe (15) communicates with the drain chamber (52).

4. The three-phase multi-stage separator for use in oil and gas according to claim 3, characterized in that, The oil inlet pipe (14) is horizontally connected to the shell (1), a baffle (6) is fixedly arranged outside the outlet end of the oil inlet pipe (14) in the shell (1), a water distribution plate (7) is fixedly arranged on the lower edge of the baffle (6) towards the side of the oil inlet pipe (14), the end of the water distribution plate (7) away from the baffle (6) is downwardly inclined, the water distribution plate (7) is inclined from the middle to both sides, and a plurality of perforations are formed in the water distribution plate (7).

5. A three-phase multi-stage separator for use in oil and gas according to claim 4, characterized in that, A gas passing channel is arranged between the rectifier blade (2) and the top wall in the shell (1), and a condensation grid (8) is arranged in the gas passing channel.

6. A three-phase multi-stage separator for use in oil and gas according to claim 5, characterized in that, A supporting blade (81) is arranged on the side of the rectifier blade (2) close to the oil inlet pipe (14), the condensation grid (8) is arranged between the supporting blade (81) and the top wall in the shell (1), and a plurality of backwater holes are formed in the supporting blade (81).

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