An oil-gas separator with a gas-phase anti-overflow function

Abstract

The present invention belongs to the technical field of petrochemical engineering and relates to an oil-gas separator with a gas-phase anti-overflow function. The present invention includes a separation box body, on which a liquid inlet pipe and a gas outlet pipe are arranged. A mist eliminator is installed in the gas outlet pipe. The invention also includes a U-shaped frame and an elastic sheet; the U-shaped frame is arranged to move up and down in the separation box body, and the elastic sheet is movably arranged on the U-shaped frame; a driving component 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 sheet is made 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 oil and water, avoiding the oil film from blocking the further escape of gas from the water, and at the same time avoiding the re-mixing of oil and water when the gas in the water is escaped. Then the U-shaped frame is moved upward, 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 downward, and the gas in the water chamber is discharged, thereby realizing the efficient separation of oil, gas and water.

Description

Technical Field

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

[0002] During the oil production process, the produced crude oil contains a large amount of water and natural gas. It needs to be degassed and dehydrated before transportation and use. The treated purified crude oil and natural gas are respectively exported as products, and the separated water can be recycled as reinjected water for oil wells.

[0003] In addition, at present, oil-gas-water separation at home and abroad generally adopts the gravity sedimentation method for oil-gas-water three-phase separation treatment, and the separation of the three substances is completed based on the density differences of oil, gas, and water. During the separation process, a mixture of oil, gas, and water substances enters the interior of the separator from the inlet. After entering, the mixture is blocked by the inlet baffle and then falls to the bottom of the separator. Under the restriction of the anti-surge baffle, it gradually tends to a flat state and undergoes oil-water separation under the action of gravity. After the mixture of oil, gas, and water substances enters the interior of the separator through the inlet, due to the large flow rate of the mixture, after hitting the inlet baffle, a large amount of oil and water will carry some natural gas and flow downward, mixing with the liquid below, resulting in the natural gas being unable to be well separated from the oil liquid. Moreover, due to the relatively small gravity of petroleum, it will form a thick oil film on the surface of the water body, making it difficult for the natural gas after being carried to pass through the oil film for discharge. As a result, the separation effect of the oil, gas, and water substances is insufficient, and at the same time, some natural gas will be discharged from the drain port along with the bottom water body, causing waste of resources.

[0004] To solve the above problems, the present invention proposes an oil-gas separator with a gas-phase anti-overflow function. Summary of the Invention

[0005] To solve the problems in the background art, the present invention proposes an oil-gas separator with a gas-phase anti-overflow function.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: An oil-gas separator with a gas-phase anti-overflow function includes a separation box body. An inlet pipe and an outlet pipe are provided on the separation box body. A mist eliminator is installed in the outlet pipe. It also includes a U-shaped frame and an elastic sheet. The U-shaped frame is arranged to move up and down in the separation box body, 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 made flush with the oil-water interface, and then the elastic sheet is moved along the oil-water interface. The elastic sheet separates the oil and water, and the elastic sheet divides the separation box body into an oil chamber and a water chamber. Then, the U-shaped frame is moved upward, 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 downward, and the gas in the water chamber is discharged. A driving component for driving the movement of the elastic sheet is provided on the U-shaped frame.

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

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

[0009] Further, a pressing plate is provided at one end of the lower end of the U-shaped frame away from the driving component. After the elastic sheet separates the oil and water, the elastic sheet is fixed by the pressing plate.

[0010] Further, a gas passage is provided on the U-shaped frame. A one-way valve is installed at the lower end of the gas passage. A fixed pipe communicating with the upper end of the gas passage is installed on the U-shaped frame. The fixed pipe is communicated with a guide pipe, and the guide pipe is communicated with the air outlet pipe.

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

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

[0013] Further, a stirring plate is rotatably installed on the connecting plate.

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

[0015] Compared with the prior art, the present invention has the following beneficial effects: By using the elastic sheet to separate the oil and water, it is possible to prevent the oil film from blocking the further escape of gas from the water, and at the same time prevent the oil and water from being mixed again when the gas in the water is escaped.

[0016] Then, by moving the U-shaped frame upward, the volume of the water chamber becomes larger to generate negative pressure, so that the gas in the water can be quickly separated. Then, by moving the U-shaped frame downward, the gas in the water chamber can be quickly discharged. The discharge efficiency of the gas is improved, and thus the efficient separation of oil, gas and water is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 is a schematic diagram of the structure of the U-shaped frame in the present invention;

[0020] Figure 4 is the enlarged view of part A in the present invention Figure 3 ;

[0021] Figure 5 is the enlarged view of part B in the present invention Figure 3 ;

[0022] Figure 6 is the schematic diagram of the cooperation between the conveying roller and the elastic sheet in the present invention

[0023] Figure 7 is the schematic diagram of the position of the positioning component in the present invention

[0024] Figure 8 is the partial sectional view of the U-shaped frame in the present invention

[0025] Figure 9 is the schematic diagram of the state after the elastic sheet covers the horizontal part of the U-shaped frame in the present invention

[0026] In the figure: 1, separation box body; 2, liquid inlet pipe; 3, gas outlet pipe; 4, gas guide pipe; 5, slider; 6, first electric push rod; 7, fixing plate; 8, drain port; 9, oil drain port; 10, baffle; 11, mist eliminator; 12, connecting rod; 13, floating ball; 14, stirring plate; 15, connecting plate; 16, first motor; 17, filter screen; 18, fixed pipe; 19, U-shaped frame; 20, elastic sheet; 21, first chute; 22, guide groove; 23, second motor; 24, conveying roller; 25, rubber pad; 26, second electric push rod; 27, pressing plate; 28, laser emitter; 29, laser receiver; 30, one-way valve; 31, gas channel; 32, oil chamber; 33, water chamber; 34, sealing plate. Specific Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] As Figures 1 - 9 shown, the technical solution adopted by the present invention is as follows: An oil and gas separator with a gas-phase anti-overflow function includes a separation box body 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 body 1, and a gas outlet pipe 3 is installed on the top of the separation box body 1. A mist eliminator 11 is installed in the gas outlet pipe 3. A drain port 8 and an oil drain port 9 are installed on the lower part of the separation box body 1, and the oil drain port 9 is located above the drain port 8.

[0029] A connecting rod 12 is fixedly installed inside the air outlet pipe 3, and the connecting rod 12 is connected with a floating ball 13 through a rope. The floating ball 13 floats upward to block the air outlet pipe 3, preventing the liquid-phase substances in the separation box body 1 from overflowing through the air outlet pipe 3.

[0030] A baffle 10 is arranged on the top wall of the separation box body 1. The oil, gas and water mixture is input into the separation box body 1 through the liquid inlet pipe 2 and impacts the baffle 10. Under the action of the baffle 10, the mixture is dispersed, and the gas is separated from the mixture, making the oil and water flow downward and not easily entraining the gas, so that the gas can float upward well into the air outlet pipe 3 and is captured and discharged by the mist eliminator 11, thereby making the gas-liquid separation effect better.

[0031] A connecting plate 15 is fixedly installed inside the separation box body 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 with the stirring plate 14. The stirring plate 14 rotates, thereby driving the mixture on the connecting plate 15 to move, making the mixture impact the inner wall of the separation box body 1, having a dispersing effect on the mixture, separating the gas from the mixture, and the gas moving into the air outlet pipe 3 after separating from the mixture.

[0032] Filter screens 17 are arranged on both sides of the connecting plate 15, and the filter screens 17 are connected with the inner wall of the separation box body 1. The mixture entering the separation box body 1 through the liquid inlet pipe 2 falls to the bottom of the separation box body 1 after passing through the filter screens 17. The filter screens 17 filter the mixture.

[0033] A U-shaped frame 19 is arranged to move up and down inside the separation box body 1, and the U-shaped frame 19 is located below the connecting plate 15. Specifically, first sliding grooves 21 are symmetrically formed on the separation box body 1, sliders 5 are slidably arranged in the first sliding grooves 21, and the U-shaped frame 19 is fixedly connected with the sliders 5. A fixing plate 7 is fixedly installed on the outer side wall of the separation box body 1, a first electric push rod 6 is fixedly installed on the fixing plate 7, and the output end of the first electric push rod 6 is fixedly connected with 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 part and vertical parts fixedly arranged at both ends of the horizontal part. Vertical plates are arranged on the vertical parts, and the vertical plates are in sealed sliding contact with the inner wall of the separation box body 1.

[0034] The slider 5 is fixedly connected with a sealing plate 34, the sealing plate 34 is in sealed sliding fit with the separation box body 1, and the sealing plate 34 blocks the first sliding groove 21.

[0035] Elastic sheets 20 are slidably arranged on the U-shaped frame 19. Specifically, as Figure 2 、 Figure 3 、 Figure 4 shown, guide grooves 22 are symmetrically formed on both sides of the U-shaped frame 19, and the guide grooves 22 bend from the lower end of the right vertical part to the horizontal part and extend to the other end of the horizontal part.

[0036] The elastic sheet 20 is slidably connected between two guiding grooves 22. By moving the U-shaped frame 19 up and down, the lower end of the U-shaped frame 19 is positioned at the boundary between oil and water. Then, when the elastic sheet 20 moves from the vertical part of the U-shaped frame 19 to the horizontal part of the U-shaped frame 19, the elastic sheet 20 divides the separation box body 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 water.

[0037] Rubber pads 25 are arranged on both sides of the guiding grooves 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.

[0038] A driving component is arranged on the U-shaped frame 19. The driving component drives the elastic sheet 20 to slide in the guiding grooves 22. The driving component includes conveying rollers 24. The conveying rollers 24 are rotatably arranged at the right end of the horizontal part of the U-shaped frame 19. There are two conveying rollers 24, and the two conveying rollers 24 are arranged on both sides of the elastic sheet 20. The conveying rollers 24 are in frictional contact with the elastic sheet 20. A second motor 23 for driving the conveying rollers 24 to rotate is installed in the U-shaped frame 19. When the conveying rollers 24 rotate, the elastic sheet 20 is driven to slide along the guiding grooves 22.

[0039] A pressing plate 27 is installed at one end of the horizontal part of the U-shaped frame 19 away from the conveying rollers 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 one end of the horizontal part of the U-shaped frame 19 away from the conveying rollers 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.

[0040] A positioning component is arranged on the U-shaped frame 19. The positioning component includes a laser emitter 28 and a laser receiver 29. The laser emitter 28 and the laser receiver 29 are installed on the horizontal part of the U-shaped frame 19. And the laser emitter 28 and the laser receiver 29 are cooperatively arranged. The laser emitted by the laser emitter 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 that after passing through oil. Therefore, the position of the lower end of the U-shaped frame 19 is judged according to the intensity of the laser received by the laser receiver 29.

[0041] A gas channel 31 is opened on the vertical part on one side of the U-shaped frame 19, and the gas channel 31 penetrates through the upper and lower ends of the vertical part. A one-way valve 30 is installed at the lower end of the gas channel 31, and the gas in the water chamber 33 flows into the gas channel 31 through the one-way valve 30. A fixed pipe 18 communicated with the upper end of the gas channel 31 is installed on the U-shaped frame 19. One end of the fixed pipe 18 away from the U-shaped frame 19 is communicated with a gas guide pipe 4, and the upper end of the gas guide pipe 4 penetrates through the separation box body 1 upward and is communicated with an air outlet pipe 3 below the mist catcher 11. The fixed pipe 18 is a telescopic pipe.

[0042] Working principle: Initially, the oil chamber 32 and the water chamber 33 are connected. The elastic sheet 20 is on the vertical part of the U-shaped frame 19, and the lower end of the elastic sheet 20 is between the two conveying rollers 24.

[0043] The oil, gas, and water mixture is input into the separation box body 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, separating the gas from the mixture. After the gas separates from the mixture, it moves into the gas outlet pipe 3 and is discharged through the gas outlet pipe 3.

[0044] The mixture falls downward onto the connecting plate 15. The stirring plate 14 rotates, driving the mixture to move, causing the mixture to impact the inner wall of the separation box body 1, which has a dispersing effect on the mixture, enabling the gas to escape from the mixture and move into the gas outlet pipe 3.

[0045] The mixture passes through the filter net 17 and falls to the bottom of the separation box body 1.

[0046] As the mixture is continuously transported into the separation box body 1, when the liquid phase substance in the separation box body 1 above the connecting plate 15 gradually increases, the floating ball 13 will gradually move upward under the action of the liquid phase substance, thereby blocking the gas outlet pipe 3 to prevent the liquid phase substance from being discharged through the gas outlet pipe 3.

[0047] The liquid inlet pipe 2 intermittently and quantitatively transports the oil, gas, and water mixture into the separation box body 1.

[0048] After the liquid inlet pipe 2 stops transporting the mixture into the separation box body 1, the mixture in the separation box body 1 is left standing 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 escape.

[0049] Initially, the laser emitter 28 and the laser receiver 29 face the oil film. 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 lower the U-shaped frame 19, and the laser emitter 28 and the laser receiver 29 move downward synchronously. When the laser emitter 28 and the laser receiver 29 face 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 interface.

[0050] 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 guiding groove 22, and the elastic sheet 20 gradually moves from the vertical portion to the horizontal portion. After the elastic sheet 20 covers the horizontal portion of the U-shaped frame 19, the second electric push rod 26 is started, and the pressing plate 27 moves downward and abuts 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 body 1, with the oil above the elastic sheet 20 and the water below the elastic sheet 20.

[0051] 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 gradually causing the gas in the water to escape from the water and move upward above the water. Then, the U-shaped frame 19 is moved downward by the first electric push rod 6, the elastic sheet 20 moves downward, the volume of the water chamber 33 gradually decreases, and the gas in the water chamber 33 enters the gas passage 31 through the one-way valve 30, then flows through the fixed pipe 18, the air guide pipe 4 into the air outlet pipe 3, and is discharged through the air outlet pipe 3.

[0052] After that, the drain port 8 is opened to drain the water in the water chamber 33. The elastic sheet 20 is moved to the oil drain port 9 by the first electric push rod 6, the oil drain port 9 is opened, and the oil liquid is discharged through the oil drain port 9.

[0053] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within 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, 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).

Images