Gas-liquid separation device for mechanical drainage and gas recovery

Abstract

The utility model discloses gas -liquid separation devices are used in machine pumping liquid gas recovery, belong to oil and gas exploitation equipment technical field, the present application sets up a variety of separation mechanism, including buffer mechanism, positive rotation separation subassembly, reverse rotation separation subassembly and condensing mechanism, wherein buffer mechanism is used for preliminary separation gas -liquid mixture and prevents liquid splashing, and the positive rotation separation subassembly and reverse rotation separation subassembly that are equipped with hydrophilic coating are used for the centrifugal force that produces simultaneously produces centrifugal force and throws out the water drop that condenses on its surface to the upward flow guiding natural gas, and the positive reverse flow guiding design can make hydrophilic coating and gas fully contact, increase condensation efficiency, and the condensing mechanism further reduces the moisture content in natural gas through condensing water removal operation, and the moisture in natural gas can be better removed through the cooperative operation of multiple separation mechanisms, which is convenient for subsequent treatment and storage of natural gas.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil and gas extraction equipment, specifically relating to a gas-liquid separation device for mechanical pumping and drainage gas extraction. Background Technology

[0002] During the production process of gas wells, the natural gas produced from the formation carries a certain amount of liquid, mainly formation water with very little condensate oil. In the process of mechanical pumping and liquid drainage for gas production, the gas-liquid separation device plays a crucial role, which can effectively separate the gas and liquid in the produced mixed fluid for subsequent processing and utilization.

[0003] However, most existing gas-liquid separation devices use a single separation method and have limited gas-liquid separation effect, making it difficult to meet the ever-increasing production demands. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a gas-liquid separation device for mechanical pumping and gas extraction, thereby solving the problem that most existing gas-liquid separation devices use only one separation method.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A gas-liquid separation device for pumping liquid to produce gas includes: The outer shell and the inner shell; the outer shell is a closed cylinder with a columnar cavity inside, and the inner shell is a tubular structure with its top end fixedly connected to the inner top surface of the outer shell; The system includes an input pipe, an output pipe, and a drain pipe. One end of the input pipe passes through the bottom side of the outer shell and the bottom side of the inner shell in sequence and is then installed inside the inner shell. One end of the output pipe passes through the top surface of the outer shell and communicates with the inner shell. One end of the drain pipe passes through the bottom surface of the outer shell and is installed and communicates with the columnar cavity. Buffer mechanism; The buffer mechanism is fixedly installed on the inner side wall of the inner shell, and the input pipe is positioned in front of the buffer mechanism. The buffer mechanism is used to slow down and disperse the gas-liquid mixture input through the input pipe. Forward rotating separation assembly; The forward rotating separation assembly is disposed on the inner side wall of the inner shell and above the buffer mechanism. The forward rotating separation assembly includes a forward rotating end and a forward driving end for driving the forward rotating end to rotate. The surface of the forward rotating end is provided with a hydrophilic coating to promote the condensation of water in the natural gas into water droplets on the surface of the forward rotating end. The forward rotating end generates centrifugal force while rotating to guide the natural gas upward, causing the condensed water droplets to be thrown towards the side wall of the inner shell. The reverse rotation separation assembly is located on the inner side wall of the inner shell and above the forward rotation separation assembly. The reverse rotation separation assembly includes a reverse rotation end and a reverse drive end for driving the reverse rotation end to rotate. The surface of the reverse rotation end is provided with a hydrophilic coating to promote the condensation of water droplets in the natural gas on the surface of the reverse rotation end. The reverse rotation end generates centrifugal force while rotating to guide the natural gas upward, causing the condensed water droplets to be thrown towards the side wall of the inner shell. Condensation mechanism; The condensation mechanism is fixedly installed on the inner side wall of the inner shell. The condensation mechanism is used to condense and remove water from the natural gas guided by the counter-rotating separation component, further reducing the moisture content.

[0006] Compared with the prior art, the beneficial effects of this utility model are: This application incorporates multiple separation mechanisms, including a buffer mechanism, a forward rotating separation component, a reverse rotating separation component, and a condensation mechanism. The buffer mechanism is used for preliminary separation of the gas-liquid mixture and to prevent liquid splashing. The forward and reverse rotating separation components, equipped with hydrophilic coatings, guide the natural gas upwards while generating centrifugal force to eject water droplets condensed on its surface. The forward and reverse flow design allows the hydrophilic coating to fully contact the gas, increasing condensation efficiency. The condensation mechanism further reduces the moisture content in the natural gas through condensation and dehydration. The coordinated operation of multiple separation mechanisms can better remove moisture from the natural gas. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the specific structure of this application; Figure 2 This is a schematic diagram showing the specific structure of the forward rotation separation component and the reverse rotation separation component; Figure 3 This is a schematic diagram of the specific structure of the condensation mechanism; The diagram is marked as follows: 1-Outer shell; 3-Input pipe; 4-Level sensor; 5-Drain pipe; 6-Solenoid valve; 7-Buffer mechanism; 8-First sub-fan blade; 9-First rotating drum; 10-First motor; 11-Second sub-fan blade; 12-Second rotating drum; 14-Second mounting plate; 15-Second motor; 16-First guide plate; 17-Second guide plate; 18-Cooling fin; 19-Output pipe; 20-Pressure valve; 21-Inner shell. Detailed Implementation

[0008] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0009] Example 1 Gas-liquid separation device for pumping liquid to produce gas, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes: The outer shell 1 and the inner shell 21; the outer shell 1 is a closed cylinder with a columnar cavity inside, and the inner shell 21 is a tubular structure with its top end fixedly connected to the inner top surface of the outer shell 1. The system includes an input pipe 3, an output pipe 19, and a drain pipe 5. One end of the input pipe 3 passes through the bottom side of the outer shell 1 and the bottom side of the inner shell 21 in sequence and is then installed inside the inner shell 21. The other end is connected to an oil pump or a gas lift device. One end of the output pipe 19 passes through the top surface of the outer shell 1 and communicates with the inner shell 21. The other end is connected to a gas compressor or a gas purification device. One end of the drain pipe 5 passes through the bottom surface of the outer shell 1 and communicates with the cylindrical cavity. The other end is connected to a liquid collection and processing device. Buffer mechanism 7; Buffer mechanism 7 is fixedly installed on the inner side wall of inner shell 21, and the input pipe 3 is positioned in front of buffer mechanism 7. Buffer mechanism 7 is used to slow down and disperse the gas-liquid mixture input through input pipe 3. Forward rotating separation assembly; The forward rotating separation assembly is disposed on the inner side wall of the inner shell 21 and above the buffer mechanism 7. The forward rotating separation assembly includes a forward rotating end and a forward driving end for driving the forward rotating end to rotate. The surface of the forward rotating end is provided with a hydrophilic coating to promote the condensation of water droplets in the natural gas on the surface of the forward rotating end. The forward rotating end generates centrifugal force while rotating to guide the natural gas upward, causing the condensed water droplets to be thrown towards the side wall of the inner shell 21. Reverse rotation separation assembly; The reverse rotation separation assembly is disposed on the inner side wall of the inner shell 21 and above the forward rotation separation assembly. The reverse rotation separation assembly includes a reverse rotation end and a reverse drive end for driving the reverse rotation end to rotate. The surface of the reverse rotation end is provided with a hydrophilic coating to promote the condensation of water droplets in the natural gas on the surface of the reverse rotation end. The reverse rotation end generates centrifugal force while rotating to guide the natural gas upward, causing the condensed water droplets to be thrown towards the side wall of the inner shell 21. Condensation mechanism; The condensation mechanism is fixedly installed on the inner side wall of the inner shell 21. The condensation mechanism is used to condense and remove water from the natural gas guided by the counter-rotating separation component, further reducing the moisture content.

[0010] In this embodiment, the present application provides multiple separation mechanisms, including a buffer mechanism 7, a forward rotating separation component, a reverse rotating separation component, and a condensation mechanism. The buffer mechanism 7 is used to initially separate the gas-liquid mixture and prevent liquid splashing. The forward rotating separation component and the reverse rotating separation component, which are equipped with hydrophilic coatings, are used to guide the natural gas upward while generating centrifugal force to throw off water droplets condensed on its surface. The forward and reverse flow design allows the hydrophilic coating to fully contact the gas, increasing the condensation efficiency. The condensation mechanism further reduces the moisture content in the natural gas through condensation and dehydration operations. The coordinated operation of multiple separation mechanisms can better remove moisture from the natural gas.

[0011] Example 2 The difference between this embodiment and Embodiment 1 is that, as Figure 1 As shown, the buffer mechanism 7 is composed of multiple stacked grids with the mesh of adjacent grids interlaced. The input pipe 3 is partially horizontally positioned within the inner housing 21. Each grid is vertically positioned, and both sides of each grid are fixedly connected to the inner sidewall of the inner housing 21. The input pipe 3 is perpendicular to each grid.

[0012] In this embodiment, the buffer mechanism 7 adopts a multi-layer mesh stacked structure, which is composed of 8 metal meshes stacked sequentially along the flow direction of the gas-liquid mixture. Each mesh is a regular hexagonal or square mesh array. The adjacent meshes are staggered by 45° or 90° in spatial layout, so that the center of the mesh of the adjacent meshes is precisely aligned with the mesh wire nodes. This staggered arrangement forms a three-dimensional maze channel structure. When the gas-liquid mixture impacts the buffer mechanism 7 at high speed, the larger diameter droplets collide with the mesh wires due to inertia, and under the action of surface tension, they aggregate into larger droplets and slide down along the mesh wires. The gas can pass smoothly through the tortuous channels formed by the staggered arrangement, thereby achieving preliminary separation of gas and liquid. At the same time, the staggered mesh structure effectively changes the movement trajectory of the gas-liquid mixture, dispersing the original straight impact into low-speed flow in multiple directions, greatly reducing the impact kinetic energy of the mixture and suppressing the phenomenon of droplet splashing.

[0013] Example 3 The difference between this embodiment and Embodiment 1 is that, as Figure 1 , Figure 2 As shown, the forward rotation separation assembly includes: First mounting plate; both ends of the first mounting plate are fixedly connected to the inner sidewall of the inner housing 21; First motor 10; First motor 10 is fixedly installed on the top surface of first mounting plate. The shaft of first motor 10 passes through the first mounting plate and is set vertically downward. First motor 10 is waterproofed, for example, by adding a waterproof shell. The power cord of first motor 10 passes through inner shell 21 and outer shell 1 and is connected to an external power source. First rotating drum 9; The first rotating drum 9 is located below the first mounting plate and is fixedly mounted on the rotating shaft of the first motor 10; Multiple sets of first fan blades; multiple sets of first fan blades are evenly distributed around the outer wall of the first rotating cylinder 9. Each set of first fan blades includes multiple first sub-fan blades 8 arranged obliquely from top to bottom. The first sub-fan blades 8 are provided with a hydrophilic coating.

[0014] Example 4 The difference between this embodiment and embodiment 3 is that, as Figure 1 , Figure 2 As shown, the reverse rotation separation assembly includes: Second mounting plate 14; both ends of the second mounting plate 14 are fixedly connected to the inner sidewall of the inner housing 21; Second motor 15; Second motor 15 is fixedly installed on the top surface of second mounting plate 14. The shaft of second motor 15 passes through second mounting plate 14 and is set vertically downward. Second motor 15 is waterproofed, for example, by adding a waterproof shell. The power cord of second motor 15 passes through inner shell 21 and outer shell 1 and is connected to an external power source. Second rotating drum 12; The second rotating drum 12 is located below the second mounting plate 14, and the second rotating drum 12 is fixedly mounted on the rotating shaft of the second motor 15; Multiple sets of second fan blades; multiple sets of second fan blades are evenly distributed around the outer wall of the second rotating cylinder 12. Each set of second fan blades includes multiple second sub-fan blades 11 arranged obliquely from top to bottom. The second sub-fan blades 11 are provided with a hydrophilic coating. The rotating shafts of the first motor 10 and the second motor 15 rotate in opposite directions, such as... Figure 2 As shown, Figure 2 (a) is a schematic diagram of the specific structure of the reverse rotation separation component. Figure 2 (b) is a schematic diagram of the specific structure of the forward rotating separation assembly, in which the tilting directions of the first and second blades in each group are opposite.

[0015] In this embodiment, the forward and reverse rotation separation components work alternately, requiring the natural gas carrying water vapor to pass through the sub-fan blades coated with a hydrophilic coating twice. During the flow of natural gas through the forward and reverse rotation separation components, the contact path with the hydrophilic coating is extended, and the contact area is significantly increased, allowing the water vapor to fully interact with the coating, thereby accelerating the condensation process. Furthermore, the forward rotation separation component first condenses and ejects most of the water vapor from the natural gas, and the remaining small amount of water vapor is then condensed a second time by the reverse rotation separation component. This dual condensation mechanism can reduce the water vapor content in the natural gas to a low level, effectively reducing the load on subsequent processing stages and meeting the requirements for high-precision water vapor separation. This structure has a wide range of applications and can be flexibly adapted to gas-containing water flow conditions with different humidity and flow rates. It can stably function whether it is for the separation of large amounts of water vapor in high humidity environments or the removal of trace amounts of moisture in low-flow-rate gas.

[0016] Example 5: The difference between this embodiment and Embodiment 1 is that, as Figure 1 , Figure 3 As shown, the condensation mechanism includes a first guide plate 16 and a second guide plate 17 with multiple vent holes, an inclined arrangement, a first opening, a second opening, and four cooling fins 18. The first guide plate 16 includes a first end at the top and a second end at the bottom. The first end of the first guide plate 16 is a semi-circle that matches the side wall of the inner shell 21. The second end of the first guide plate 16 passes through the first opening and is disposed between the outer shell 1 and the inner shell 21. The second guide plate 17 is disposed below the first guide plate 16 and includes a first end at the top and a second end at the bottom. The second end of the second guide plate 17 is a semi-circle that matches the side wall of the inner shell 21. The second end of the second guide plate 17 passes through the second opening and is located between the outer shell 1 and the inner shell 21. The first guide plate 16 and the second guide plate 17 are each provided with two cooling fins 18. The first end of each cooling fin 18 is fixedly attached to the first guide plate 16 or the second guide plate 17, and the other end passes through the inner shell 21 and the outer shell 1 and is located outside the outer shell 1 and is in contact with the cooling surface of the semiconductor refrigeration chip. The heat dissipation surface of the semiconductor refrigeration chip is connected to the heat dissipation device.

[0017] In this embodiment, the cooling plate 18, the first guide plate 16, and the second guide plate 17 are all made of copper to reduce costs while maximizing heat transfer efficiency. The heat dissipation device is a water cooling device, which uses circulating coolant to remove the heat generated by the semiconductor cooling chip. The water cooling device mainly consists of a water cooling head, a water pump, a water tank, and water pipes. The water cooling head is directly attached to the heat dissipation surface of the semiconductor. When the water vapor in the natural gas is cooled, it will form water droplets on the surface of the first guide plate 16 and the second guide plate 17. After the water droplets gather, they form a small stream of water. The water stream will flow along the inclined direction of the first guide plate 16 and the second guide plate 17 to the space between the outer shell 1 and the inner shell 21, and finally fall into the bottom of the outer shell 1. This can prevent the liquid from flowing down the side wall of the inner shell 21, which would cause the natural gas to carry liquid again.

[0018] Example 6 The difference between this embodiment and Embodiment 1 is that, as Figure 1 As shown, the gas-liquid separation device also includes: Solenoid valve 6; Solenoid valve 6 is installed on drain pipe 5; Liquid level sensor 4; Liquid level sensor 4 is set at a preset position on the inner side wall of the bottom end of the outer shell 1. Liquid level sensor 4 is located below the inner shell 21. Liquid level sensor 4 is used to generate an opening or closing signal according to the liquid level in the outer shell 1. The control module is connected to both the solenoid valve 6 and the liquid level sensor 4. The control module is used to control the solenoid valve 6 to perform opening or closing actions according to the opening or closing signal. The control module adopts a single-chip microcomputer of model STC89C52.

[0019] Example 7 The difference between this embodiment and embodiment 6 is that, as Figure 1 As shown, the gas-liquid separation device also includes a pressure valve 20, which is installed on the output pipe 19. When the gas pressure inside the outer casing 1 is too high, the diaphragm of the pressure valve 20 deforms upward, and the pressure valve 20 releases part of the gas, thereby stabilizing the gas pressure.

[0020] Example 8 The difference between this embodiment and Embodiment 1 is that, as Figure 1 As shown, the bottom surface of the cylindrical cavity is a downward convex arc surface. Since there may be a small amount of solid impurities in the gas-liquid mixture, the arc surface allows the impurities to roll off into the drain pipe 5 more effectively.

[0021] Example 9 The difference between this embodiment and embodiment 4 is that, as Figure 1As shown, the orthographic projections of the first rotating drum 9 and the second rotating drum 12 onto the inner shell 21 form two annular projection areas, respectively. The portions of the inner shell 21 in the two annular projection areas are all grid structures. The liquid ejected by the rotation of the first rotating drum 9 and the second rotating drum 12 can enter the space between the inner shell 21 and the outer shell 1 through the grid and eventually flow into the bottom of the outer shell 1. This can prevent the liquid from flowing downward along the side wall of the inner shell 21, thus avoiding the secondary entrainment of liquid in the natural gas.

[0022] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this application, and should be understood as not limiting the scope of protection of this application to such specific statements and embodiments. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A gas-liquid separation device for mechanically pumped liquid drainage and gas extraction, characterized in that, include: The outer shell (1) and the inner shell (21) are: the outer shell (1) is a closed cylinder with a columnar cavity inside; the inner shell (21) is a tubular structure and the top of the inner shell (21) is fixedly connected to the inner top surface of the outer shell (1); The input pipe (3), output pipe (19), and drain pipe (5) are arranged in a series. One end of the input pipe (3) passes through the bottom side of the outer shell (1) and the bottom side of the inner shell (21) and is then placed inside the inner shell (21). One end of the output pipe (19) passes through the top surface of the outer shell (1) and is connected to the inner shell (21). One end of the drain pipe (5) passes through the bottom surface of the outer shell (1) and is connected to the columnar cavity. Buffer mechanism (7); The buffer mechanism (7) is fixedly installed on the inner wall of the inner shell (21), and the input pipe (3) is set to the buffer mechanism (7). The buffer mechanism (7) is used to slow down and disperse the gas-liquid mixture input by the input pipe (3); Forward rotating separation assembly; The forward rotating separation assembly is set on the inner side wall of the inner shell (21) and is set above the buffer mechanism (7). The forward rotating separation assembly includes a forward rotating end and a forward driving end for driving the forward rotating end to rotate. The surface of the forward rotating end is provided with a hydrophilic coating to promote the condensation of water in the natural gas into water droplets on the surface of the forward rotating end. The forward rotating end generates centrifugal force while rotating to guide the natural gas upward, so that the condensed water droplets are thrown towards the side wall of the inner shell (21). Reverse rotation separation assembly; The reverse rotation separation assembly is set on the inner side wall of the inner shell (21) and is set above the forward rotation separation assembly. The reverse rotation separation assembly includes a reverse rotation end and a reverse drive end for driving the reverse rotation end to rotate. The surface of the reverse rotation end is provided with a hydrophilic coating to promote the condensation of water in the natural gas into water droplets on the surface of the reverse rotation end. The reverse rotation end generates centrifugal force while rotating to guide the natural gas upward, so that the condensed water droplets are thrown towards the side wall of the inner shell (21). Condensation mechanism; The condensation mechanism is fixedly installed on the inner wall of the inner shell (21). The condensation mechanism is used to condense and remove water from the natural gas guided by the reverse rotating separation component, further reducing the moisture content.

2. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 1, characterized in that, The buffer mechanism (7) is composed of multiple stacked grids with the mesh of adjacent grids interlaced. The input tube (3) is partially horizontally positioned in the inner shell (21). Each grid is vertically positioned, and both sides of each grid are fixedly connected to the inner wall of the inner shell (21). The input tube (3) is perpendicular to each grid.

3. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 1, characterized in that, The forward rotation separation assembly includes: First mounting plate; both ends of the first mounting plate are fixedly connected to the inner sidewall of the inner shell (21); First motor (10); The first motor (10) is fixedly installed on the top surface of the first mounting plate, and the shaft of the first motor (10) passes through the first mounting plate and is set vertically downward; First rotating drum (9); The first rotating drum (9) is located below the first mounting plate and is fixedly mounted on the shaft of the first motor (10); Multiple sets of first fan blades; multiple sets of first fan blades are evenly distributed around the outer wall of the first rotating cylinder (9), each set of first fan blades includes multiple first sub-fan blades (8) arranged obliquely from top to bottom, and the first sub-fan blades (8) are provided with a hydrophilic coating.

4. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 3, characterized in that, The reverse rotation separation assembly includes: Second mounting plate (14); both ends of the second mounting plate (14) are fixedly connected to the inner sidewall of the inner shell (21); The second motor (15) is fixedly mounted on the top surface of the second mounting plate (14), and the shaft of the second motor (15) passes through the second mounting plate (14) and is set vertically downward. The second rotating drum (12) is located below the second mounting plate (14) and is fixedly mounted on the shaft of the second motor (15). Multiple sets of second fan blades; multiple sets of second fan blades are evenly distributed around the outer wall of the second rotating cylinder (12). Each set of second fan blades includes multiple second sub-fan blades (11) arranged obliquely from top to bottom. The second sub-fan blades (11) are provided with a hydrophilic coating. The rotating shafts of the first motor (10) and the second motor (15) rotate in opposite directions. The tilting directions of each set of first fan blades and second fan blades are opposite.

5. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 1, characterized in that, The condensation mechanism includes: At least one guide plate; the guide plate is inclined and includes a first end at the top and a second end at the bottom. The first end of the guide plate is fixedly connected to the inner wall of the inner shell (21). The inner shell (21) has at least one opening on its side wall. The second end of the guide plate passes through an opening and is located between the inner shell (21) and the outer shell (1). The guide plate has multiple vent holes. At least one cooling plate (18); the first end of the cooling plate (18) is fixedly attached to the guide plate, and the other end passes through the inner shell (21) and the outer shell (1) and is disposed outside the outer shell (1) and is attached to the cooling surface of the semiconductor cooling plate. The heat dissipation surface of the semiconductor cooling plate is connected to the heat dissipation device.

6. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 1, characterized in that, The gas-liquid separation device also includes: Solenoid valve (6); Solenoid valve (6) is installed on drain pipe (5); Liquid level sensor (4); The liquid level sensor (4) is set at a preset position on the inner side wall of the bottom end of the outer shell (1). The liquid level sensor (4) is located below the inner shell (21). The liquid level sensor (4) is used to generate an opening or closing signal according to the liquid level inside the outer shell (1). Control module; Solenoid valve (6) and liquid level sensor (4) are both connected to the control module. The control module is used to control solenoid valve (6) to perform opening or closing actions according to the opening or closing signal.

7. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 6, characterized in that, The gas-liquid separation device also includes a pressure valve (20), which is installed on the output pipe (19).

8. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 1, characterized in that, The bottom surface of the cylindrical cavity is a downward-convex arc surface.

9. The gas-liquid separation device for mechanically pumped liquid drainage and gas extraction according to claim 4, characterized in that, The first rotating cylinder (9) and the second rotating cylinder (12) project onto the inner shell (21) to form two annular projection areas, and the inner shell (21) in the two annular projection areas is a grid structure.

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