Oil-gas separator with gas phase anti-overflow function

Abstract

The invention belongs to the technical field of petrochemical engineering, and relates to an oil-gas separator with a gas phase anti-overflow function. The device comprises a separation box body, a liquid inlet pipe and an air outlet pipe are arranged on the separation box body, a mist catcher is installed in the air outlet pipe, and the device further comprises a U-shaped frame and an elastic piece; the U-shaped frame is arranged in the separation box body in an up-down moving mode, and the elastic piece is movably arranged on the U-shaped frame; and a driving assembly for driving the elastic sheet to move is arranged on the U-shaped frame. By moving the U-shaped frame, the lower end of the elastic piece is flush with the boundary of oil and water, then the elastic piece moves along the boundary of the oil and water, the oil and the water are separated through the elastic piece, an oil film is prevented from blocking gas to be further separated from the water, and meanwhile, the oil and the water are prevented from being mixed again when the gas in the water is separated. Then the U-shaped frame is moved upwards, the volume of the water cavity is increased, gas in the water is removed under the action of negative pressure, the U-shaped frame is moved downwards, the gas in the water cavity is exhausted, and then oil, gas and water are efficiently separated.

Description

Technical Field

[0001] The invention belongs to the technical field of petrochemical industry and relates to an oil-gas separator with a gas phase overflow prevention function. Background Art

[0002] During the oil production process, the produced crude oil contains a large amount of water and natural gas, which needs to be degassed and dehydrated before it can be transported and used. The purified crude oil and natural gas after treatment are exported separately as products, and the separated water can be recycled as reinjection water for the oil well.

[0003] In addition, at present, the separation of oil, gas and water at home and abroad generally adopts gravity sedimentation to separate the three phases of oil, gas and water, and the separation of the three phases is completed based on the density difference of the three phases of oil, gas and water. During the separation process, the mixture of oil, gas and water enters the separator from the inlet. After entering, the mixture falls to the bottom of the separator under the blockage of the inlet baffle, and gradually tends to a flat state under the restriction of the wave-breaking plate, and the oil and water are separated under the action of gravity. After the oil, gas and water three-phase mixture enters the separator through the inlet, due to the large flow rate of the mixture, after colliding with the inlet baffle, a large amount of oil and water will entrain part of the natural gas to flow downward and mix with the liquid below, resulting in the inability of natural gas to be well separated from the oil and liquid. In addition, due to the small gravity of oil, it will form a thicker oil film on the surface of the water body, making it difficult for the entrained natural gas to pass through the oil film for discharge, resulting in insufficient separation effect of the three phases of oil, gas and water, and at the same time, it will also cause part of the natural gas to be discharged from the drain with the bottom water, resulting in a waste of resources.

[0004] In order to solve the above problems, the present invention proposes an oil-gas separator with a gas phase overflow prevention function. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention proposes an oil-gas separator with a gas phase overflow prevention function.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an oil-gas separator with gas phase overflow prevention function, including a separation box, a liquid inlet pipe and an air outlet pipe are arranged on the separation box, a mist collector is installed in the air outlet pipe, and also includes a U-shaped frame and an elastic sheet; the U-shaped frame is movably arranged in the separation box, and the elastic sheet is movably arranged on the U-shaped frame; by moving the U-shaped frame, the lower end of the elastic sheet is flush with the boundary between oil and water, and then the elastic sheet is moved along the boundary between oil and water, the elastic sheet separates the oil and water, and the elastic sheet divides the separation box into an oil chamber and a water chamber, and then the U-shaped frame is moved up, the volume of the water chamber becomes larger, and the gas in the water escapes under the action of negative pressure, the U-shaped frame is moved down, and the gas in the water chamber is discharged; a driving component for driving the elastic sheet to move is arranged on the U-shaped frame.

[0007] Furthermore, a positioning component is provided on the U-shaped frame, and the positioning component includes a laser transmitter and a laser receiver, and the laser emitted by the laser transmitter is received by the laser receiver.

[0008] Furthermore, the driving assembly includes two conveying rollers, which are arranged on both sides of the elastic sheet. The conveying rollers are rotatably mounted on a U-shaped frame, and a second motor for driving the conveying rollers to rotate is mounted on the U-shaped frame.

[0009] Furthermore, a pressure plate is provided at one end of the lower end of the U-shaped frame away from the driving assembly, and after the elastic sheet separates the oil and water, the elastic sheet is fixed by the pressure plate.

[0010] Furthermore, a gas channel is provided on the U-shaped frame, a one-way valve is installed at the lower end of the gas channel, a fixed pipe connected to the upper end of the gas channel is installed on the U-shaped frame, the fixed pipe is connected to an air guide pipe, and the air guide pipe is connected to the air outlet pipe.

[0011] Furthermore, a connecting rod is provided in the air outlet pipe, and the connecting rod is connected to a floating ball through a rope.

[0012] Furthermore, a connecting plate is installed in the separation box, and filter screens are arranged on both sides of the connecting plate.

[0013] Furthermore, a stirring plate is rotatably mounted on the connecting plate.

[0014] Furthermore, a baffle is installed on the top wall of the separation box.

[0015] Compared with the prior art, the present invention has the following beneficial effects: by separating the oil and water with the elastic sheet, the oil film is prevented from blocking the further escape of the gas from the water, and the re-mixing of the oil and water is prevented when the gas in the water is escaped.

[0016] Then, by moving the U-shaped frame upward, the volume of the water cavity increases and negative pressure is generated, so that the gas in the water is quickly separated. Then, by moving the U-shaped frame downward, the gas in the water cavity is quickly discharged. The gas discharge efficiency is improved, and the oil, gas and water are separated efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a structural schematic diagram of the U-shaped frame in the present invention; Figure 4 The present invention Figure 3 A magnified view of part A; Figure 5 The present invention Figure 3 A magnified view of part B; Figure 6 It is a schematic diagram of the cooperation between the conveying roller and the elastic sheet in the present invention; Figure 7 It is a schematic diagram of the position of the positioning component in the present invention; Figure 8 It is a partial cross-sectional view of the U-shaped frame in the present invention; Fig. 9 It is a schematic diagram of the state in which the elastic sheet in the present invention shields the horizontal part of the U-shaped frame.

[0018] In the figure: 1. separation box; 2. liquid inlet pipe; 3. air outlet pipe; 4. air guide pipe; 5. slider; 6. first electric push rod; 7. fixed plate; 8. drain outlet; 9. oil drain outlet; 10. baffle; 11. mist collector; 12. connecting rod; 13. float; 14. stirring plate; 15. connecting plate; 16. first motor; 17. filter screen; 18. fixed pipe; 19. U-shaped frame; 20. elastic sheet; 21. first slide groove; 22. guide groove; 23. second motor; 24. conveying roller; 25. rubber pad; 26. second electric push rod; 27. pressure plate; 28. laser transmitter; 29. ​​laser receiver; 30. one-way valve; 31. gas channel; 32. oil chamber; 33. water chamber; 34. sealing plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0020] like Figure 1-Figure 9 As shown, the technical solution adopted by the present invention is as follows: an oil-gas separator with gas phase overflow prevention function includes a separation box 1, a U-shaped frame 19 and an elastic sheet 20, a liquid inlet pipe 2 is installed on the upper part of the separation box 1, and an air outlet pipe 3 is installed on the top of the separation box 1. A mist collector 11 is installed in the air outlet pipe 3. A water drain port 8 and an oil drain port 9 are installed at the lower part of the separation box 1, and the oil drain port 9 is located above the water drain port 8.

[0021] A connecting rod 12 is fixedly installed in the air outlet pipe 3, and the connecting rod 12 is connected to a floating ball 13 through a rope. The floating ball 13 floats upward to block the air outlet pipe 3 to prevent the liquid phase material in the separation box 1 from overflowing through the air outlet pipe 3.

[0022] A baffle 10 is provided on the top wall of the separation box 1. The oil, gas and water mixture is input into the separation box 1 through the liquid inlet pipe 2 and impacts the baffle 10. Under the action of the baffle 10, the mixture is broken up and the gas is separated from the mixture, so that the oil and water flowing downward are not easy to entrain the gas, so that the gas can float upward into the outlet pipe 3 well, and be captured and discharged by the mist collector 11, thereby achieving a better gas-liquid separation effect.

[0023] A connecting plate 15 is fixedly installed in the separation box 1, and a stirring plate 14 is rotatably installed on the connecting plate 15. A first motor 16 is embedded in the connecting plate 15, and the motor shaft of the first motor 16 is fixedly connected to the stirring plate 14. The stirring plate 14 rotates, thereby driving the mixture on the connecting plate 15 to move, so that the mixture impacts the inner wall of the separation box 1, has a dispersing effect on the mixture, separates the gas from the mixture, and the gas moves into the gas outlet pipe 3 after being separated from the mixture.

[0024] Filter screens 17 are provided on both sides of the connecting plate 15, and the filter screens 17 are connected to the inner wall of the separation box 1. The mixture entering the separation box 1 through the liquid inlet pipe 2 falls to the bottom of the separation box 1 through the filter screen 17. The filter screen 17 filters the mixture.

[0025] The U-shaped frame 19 is arranged in the separation box 1 so as to move up and down, and the U-shaped frame 19 is located below the connecting plate 15. Specifically, the separation box 1 is symmetrically provided with a first slide groove 21, a slider 5 is slidably arranged in the first slide groove 21, and the U-shaped frame 19 is fixedly connected to the slider 5. A fixed plate 7 is fixedly installed on the outer wall of the separation box 1, a first electric push rod 6 is fixedly installed on the fixed plate 7, and an output end of the first electric push rod 6 is fixedly connected to the slider 5. The first electric push rod 6 drives the U-shaped frame 19 to move up and down through the slider 5. The U-shaped frame 19 includes a horizontal portion and vertical portions fixedly arranged at both ends of the horizontal portion. The vertical portion is provided with a vertical plate, and the vertical plate is in sealing sliding contact with the inner wall of the separation box 1.

[0026] The slider 5 is fixedly connected with a sealing plate 34 , and the sealing plate 34 is in sealing and sliding cooperation with the separation box 1 , and the sealing plate 34 blocks the first sliding groove 21 .

[0027] The elastic sheet 20 is slidably disposed on the U-shaped frame 19. Specifically, Figure 2 , Figure 3 , Figure 4 As shown, guide grooves 22 are symmetrically provided on both sides of the U-shaped frame 19. The guide groove 22 is bent from the lower end of the right vertical portion to the horizontal portion and extends to the other end of the horizontal portion.

[0028] The elastic sheet 20 is slidably connected between the two guide grooves 22. By moving the U-shaped frame 19 up and down, the lower end of the U-shaped frame 19 is at the boundary between oil and water, and then the elastic sheet 20 is moved from the vertical part of the U-shaped frame 19 to the horizontal part of the U-shaped frame 19. The elastic sheet 20 separates the separation box 1 below the connecting plate 15 into an oil chamber 32 and a water chamber 33, and the elastic sheet 20 separates the oil and the water.

[0029] Rubber pads 25 are provided on both sides of the guide groove 22 . The rubber pads 25 are in contact with the elastic sheet 20 to increase the sealing performance between the elastic sheet 20 and the U-shaped frame 19 .

[0030] The U-shaped frame 19 is provided with a driving assembly. The driving assembly drives the elastic sheet 20 to slide in the guide groove 22. The driving assembly includes a conveying roller 24. The conveying roller 24 is rotatably provided at the right end of the horizontal portion of the U-shaped frame 19. There are two conveying rollers 24, and the two conveying rollers 24 are respectively provided on both sides of the elastic sheet 20. The conveying roller 24 is in frictional contact with the elastic sheet 20. A second motor 23 for driving the conveying roller 24 to rotate is installed in the U-shaped frame 19. The conveying roller 24 rotates, thereby driving the elastic sheet 20 to slide along the guide groove 22.

[0031] A pressing plate 27 is installed at one end of the horizontal part of the U-shaped frame 19 away from the conveying roller 24. A second electric push rod 26 is fixedly installed in the U-shaped frame 19, and the pressing plate 27 is fixed on the output shaft of the second electric push rod 26. When the elastic sheet 20 moves to the end of the horizontal part of the U-shaped frame 19 away from the conveying roller 24, the second electric push rod 26 drives the pressing plate 27 to move downward and press against the elastic sheet 20 to fix the elastic sheet 20.

[0032] The U-shaped frame 19 is provided with a positioning assembly. The positioning assembly includes a laser transmitter 28 and a laser receiver 29. The laser transmitter 28 and the laser receiver 29 are installed on the horizontal part of the U-shaped frame 19. The laser transmitter 28 and the laser receiver 29 are arranged in coordination. The laser emitted by the laser transmitter 28 is received by the laser receiver 29 after passing through oil or water. The intensity of the laser after passing through water is greater than the intensity of the laser after passing through oil. Therefore, the position of the lower end of the U-shaped frame 19 is determined according to the intensity of the laser received by the laser receiver 29.

[0033] A gas channel 31 is provided on the vertical portion of one side of the U-shaped frame 19, and the gas channel 31 runs through the upper and lower ends of the vertical portion. A one-way valve 30 is installed at the lower end of the gas channel 31, and the gas in the water cavity 33 flows into the gas channel 31 through the one-way valve 30. A fixed pipe 18 connected to the upper end of the gas channel 31 is installed on the U-shaped frame 19. The end of the fixed pipe 18 away from the U-shaped frame 19 is connected to the air guide pipe 4, and the upper end of the air guide pipe 4 passes through the separation box 1 upward and is connected to the air outlet pipe 3 below the mist collector 11. The fixed pipe 18 is a telescopic pipe.

[0034] Working principle: Initially, the oil chamber 32 and the water chamber 33 are connected, the elastic sheet 20 is located on the vertical portion of the U-shaped frame 19 , and the lower end of the elastic sheet 20 is located between the two conveying rollers 24 .

[0035] The oil, gas and water mixture is input into the separation box 1 through the liquid inlet pipe 2. The oil, gas and water mixture impacts the baffle 10. The baffle 10 has a dispersing effect on the mixture, so that the gas is separated from the mixture. After the gas is separated from the mixture, it moves into the outlet pipe 3 and is discharged through the outlet pipe 3.

[0036] The mixture falls downward onto the connecting plate 15 , and the stirring plate 14 rotates, driving the mixture to move, causing the mixture to impact the inner wall of the separation box 1 , thereby dispersing the mixture and causing the gas to escape from the mixture and move into the gas outlet pipe 3 .

[0037] The mixture passes through the filter screen 17 and falls to the bottom of the separation box 1.

[0038] As the mixed material is continuously transported into the separation box 1, if the liquid phase material in the separation box 1 above the connecting plate 15 gradually increases, the float 13 will gradually move upward under the action of the liquid phase material, thereby blocking the air outlet pipe 3 to prevent the liquid phase material from being discharged through the air outlet pipe 3.

[0039] The liquid inlet pipe 2 intermittently delivers a quantitative mixture of oil, gas and water into the separation box 1.

[0040] After the liquid inlet pipe 2 stops conveying liquid into the separation box 1, the mixture in the separation box 1 is left to stand for a period of time. Since the density of oil is less than that of water, the oil will gradually float on the water surface and form an oil film on the upper surface of the water, making it difficult for the gas entrained by the water to pass through the oil film and be discharged.

[0041] Initially, the laser emitter 28 and the laser receiver 29 are opposite to the oil film, and the laser emitted by the laser emitter 28 is received by the laser receiver 29 after passing through the oil film. The first electric push rod 6 is started to move the U-shaped frame 19 downward, and the laser emitter 28 and the laser receiver 29 are synchronously moved downward. When the laser emitter 28 and the laser receiver 29 are opposite to the water, the laser emitted by the laser emitter 28 passes through the water and is received by the laser receiver 29. When the laser emitted by the laser emitter 28 passes through the water, the intensity of the laser received by the laser receiver 29 increases, and then the first electric push rod 6 stops. At this time, the lower end of the elastic sheet 20 is flush with the oil-water boundary.

[0042] Then the second motor 23 is started, the conveying roller 24 rotates, and the conveying roller 24 drives the elastic sheet 20 to slide along the guide groove 22, and the elastic sheet 20 gradually moves from the vertical part to the horizontal part. When the elastic sheet 20 blocks the horizontal part of the U-shaped frame 19, the second electric push rod 26 is started, and the pressing plate 27 moves down to abut against the elastic sheet 20 to fix the elastic sheet 20. At this time, the elastic sheet 20 separates the oil and water in the separation box 1, and the oil is located above the elastic sheet 20, and the water is located below the elastic sheet 20.

[0043] Then the first electric push rod 6 is started to move the U-shaped frame 19 upward, thereby increasing the volume of the water chamber 33, generating negative pressure in the water chamber 33, and causing the gas in the water to gradually escape from the water and move upward above the water. Then the first electric push rod 6 moves the U-shaped frame 19 downward, and the elastic sheet 20 moves downward, and the volume of the water chamber 33 gradually decreases, so that the gas in the water chamber 33 passes through the one-way valve 30 and enters the gas channel 31, and then flows into the gas outlet pipe 3 through the fixed pipe 18 and the gas guide pipe 4, and is discharged through the gas outlet pipe 3.

[0044] Afterwards, the drain port 8 is opened to drain the water in the water cavity 33 , and the elastic sheet 20 is moved to the oil drain port 9 by the first electric push rod 6 , and the oil drain port 9 is opened, and the oil is discharged through the oil drain port 9 .

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-gas separator with a gas phase overflow prevention function, comprising a separation box (1), wherein the separation box (1) is provided with a liquid inlet pipe (2) and an air outlet pipe (3), wherein a mist collector (11) is installed in the air outlet pipe (3), and wherein: The invention also comprises a U-shaped frame (19) and an elastic sheet (20); the U-shaped frame (19) is arranged in the separation box (1) so as to move up and down, and the elastic sheet (20) is movably arranged on the U-shaped frame (19); by moving the U-shaped frame (19), the lower end of the elastic sheet (20) is flush with the boundary between oil and water, and then the elastic sheet (20) is moved along the boundary between oil and water, the elastic sheet (20) separates the oil and water, and the elastic sheet (20) divides the separation box (1) into an oil chamber (32) and a water chamber (33); then the U-shaped frame (19) is moved upward, the volume of the water chamber (33) is increased, and the gas in the water escapes under the action of negative pressure; the U-shaped frame (19) is moved downward, and the gas in the water chamber (33) is discharged; and a driving component for driving the elastic sheet (20) to move is arranged on the U-shaped frame (19).

2. The oil-gas separator with gas phase overflow prevention function according to claim 1 is characterized in that: The U-shaped frame (19) is provided with a positioning component, the positioning component comprising a laser transmitter (28) and a laser receiver (29), and the laser emitted by the laser transmitter (28) is received by the laser receiver (29).

3. The oil-gas separator with gas phase overflow prevention function according to claim 1 is characterized in that: The driving assembly comprises a conveying roller (24), wherein the conveying roller (24) has two conveying rollers (24), the two conveying rollers (24) are arranged on both sides of the elastic sheet (20), and the conveying roller (24) is rotatably mounted on a U-shaped frame (19). A second motor (23) for driving the conveying roller (24) to rotate is mounted on the U-shaped frame (19).

4. The oil-gas separator with gas phase overflow prevention function according to claim 1 is characterized in that: A pressing plate (27) is provided at one end of the lower end of the U-shaped frame (19) away from the driving assembly. After the elastic sheet (20) separates the oil and water, the pressing plate (27) is used to fix the elastic sheet (20).

5. The oil-gas separator with gas phase overflow prevention function according to claim 1 is characterized in that: A gas passage (31) is provided on the U-shaped frame (19), a one-way valve (30) is installed at the lower end of the gas passage (31), a fixed pipe (18) connected to the upper end of the gas passage (31) is installed on the U-shaped frame (19), the fixed pipe (18) is connected to an air guide pipe (4), and the air guide pipe (4) is connected to an air outlet pipe (3).

6. The oil-gas separator with gas phase overflow prevention function according to claim 1 is characterized in that: A connecting rod (12) is arranged in the air outlet pipe (3), and the connecting rod (12) is connected to a floating ball (13) via a rope.

7. The oil-gas separator with gas phase overflow prevention function according to claim 1 is characterized in that: A connecting plate (15) is installed in the separation box (1), and filter screens (17) are arranged on both sides of the connecting plate (15).

8. The oil-gas separator with gas phase overflow prevention function according to claim 7 is characterized in that: A stirring plate (14) is rotatably mounted on the connecting plate (15).

9. The oil-gas separator with gas phase overflow prevention function according to claim 1, characterized in that: A baffle (10) is installed on the top wall of the separation box (1).

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