A sand separation device for gas wells

Abstract

This utility model relates to the field of natural gas separation technology, specifically to a sand removal and separation device for gas wells, comprising: a tank body, an air inlet pipe on the side wall of the tank body, a gas collecting pipe on the top of the tank body, and a sand discharge pipe at the bottom of the tank body, the gas collecting pipe extending into the tank body; a vortex vane, the vortex vane being disposed on the outer wall of the gas collecting pipe, forming a spiral guide groove on the gas collecting pipe, the top end of the spiral guide groove being aligned with the air inlet pipe; and a sand filtering mechanism, the sand filtering mechanism being rotatably disposed within the gas collecting pipe. The airflow flows downwards along the spiral guide groove, entering the gas collecting pipe from the bottom end, accelerating gas-solid separation. Solids are output from the sand discharge pipe, reducing the amount of solids entering the gas collecting pipe and improving the sand removal effect. Simultaneously, the sand filtering mechanism can rotate relative to the gas collecting pipe under the action of the airflow, making it less prone to solid sand and gravel adhesion and clogging, reducing the maintenance frequency of the device and improving its performance and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of natural gas separation technology, specifically to a sand removal and separation device for gas wells. Background Technology

[0002] Natural gas extracted from natural gas wells is often discharged in the form of a mixture, which generally contains sand, impurities, and mixed gas. It needs to be connected to a separation and desanding device through pipelines to remove sand and impurities. Existing separation and desanding devices are generally equipped with cyclone components and filter structures. The cyclone components drive the mixed gas to agitate, accelerating gas-solid separation, and the filter structure further removes fine sand and some water vapor from the mixed gas to improve the purity of the discharged gas.

[0003] However, in existing sand removal devices, the cyclone assembly and the filter structure are generally set up independently. The filter structure is usually fixed above the cyclone assembly. When the mixed air passes through the filter structure, small sand particles in the airflow are easily embedded in the filter structure, causing the filter structure to become clogged. This requires regular cleaning and affects the performance and efficiency of the sand removal device. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing sand removal devices, where the filter screen structure is independently set above the cyclone assembly, resulting in poor sand removal effect, easy clogging, and affecting the device's performance and efficiency. This invention provides a sand removal and separation device for gas wells.

[0005] This utility model provides a sand removal and separation device for gas wells, comprising:

[0006] The tank body has an air inlet pipe on its side wall, an air collection pipe on its top, and a sand discharge pipe at its bottom, with the air collection pipe extending into the tank body.

[0007] A swirl vane is disposed on the outer wall of the gas collecting pipe, and a spiral guide groove is formed on the gas collecting pipe, with the top end of the spiral guide groove aligned with the air inlet pipe.

[0008] A sand filtering mechanism is rotatably disposed inside the air collecting pipe.

[0009] This utility model discloses a sand removal and separation device for gas wells. It uses swirling blades to agitate the airflow input from the inlet pipe, causing the airflow to spiral downwards along a spiral guide groove, accelerating gas-solid separation. Simultaneously, after passing through the spiral guide groove, the airflow enters the gas collecting pipe from the bottom, where the flow direction abruptly changes. Most of the solids can continue to fall downwards under inertia and are then output from the sand discharge pipe, reducing the amount of solids entering the gas collecting pipe and improving the sand removal effect. Furthermore, a sand filter mechanism is installed inside the gas collecting pipe for secondary separation of the airflow, further enhancing the separation effect. The sand filter mechanism can rotate relative to the gas collecting pipe under the action of the airflow, making it less prone to solid sand and gravel adhesion and clogging, reducing the maintenance frequency of the device and improving its performance and efficiency.

[0010] Preferably, the sand filtering mechanism includes a rotating frame and a filter screen, the filter screen is disposed at the bottom end of the rotating frame, and the rotating frame is rotatably engaged with the air collecting pipe.

[0011] Preferably, the rotating frame is provided with fan blades and a perforated section. The airflow can drive the fan blades, causing the rotating frame to rotate relative to the air collecting pipe under the action of the airflow, thereby driving the filter screen to rotate.

[0012] Preferably, the rotating frame includes a rotating shaft, with a turntable connected to the top and a crossbar connected to the bottom. The hollow part is disposed on the turntable, the turntable is rotatably engaged with the air collection pipe, and the filter screen is connected to the bottom of the crossbar.

[0013] Preferably, the filter screen is cone-shaped, wider at the top and narrower at the bottom, to increase the filtration area and improve the filtration efficiency.

[0014] Preferably, the air collecting pipe is equipped with a sand-scraping mechanism that fits against the outer wall of the filter screen. This removes sand and gravel from the filter screen, preventing fine sand from accumulating and enabling automatic cleaning of the filter screen. This ensures long-term use and improves the efficiency of the device.

[0015] Preferably, the scraping mechanism includes a base on which bristles are provided.

[0016] Preferably, the substrate includes a rod, a plate, or a roller.

[0017] Preferably, the top of the gas collecting pipe is connected to a buffer box, and the buffer box is connected to an exhaust pipe, with the gas collecting pipe and the exhaust pipe perpendicular to each other. This allows the output airflow to enter the larger buffer box from the pipe, slowing down its speed and allowing impurities to settle further, thus improving the quality of the output airflow.

[0018] Preferably, the bottom and top of the tank are respectively shaped like buckets, the tank is mounted on a support, the bottom of the tank is connected to a sand collection box through the sand discharge pipe, the sand collection box is mounted on the support, and the sand collection box is equipped with a drawer structure.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model provides a desanding and separation device for gas wells, which uses swirl vanes to disturb the airflow input from the air inlet pipe, causing the airflow to flow downwards in a spiral guide groove, thereby accelerating the gas-solid separation of the airflow;

[0021] 2. This utility model provides a desanding and separation device for gas wells. By allowing the airflow to pass through a spiral guide groove and enter the gas collecting pipe from the bottom end, the flow direction changes abruptly, allowing most of the solids to continue falling downwards under inertia and then being output from the sand discharge pipe. This reduces the amount of solids entering the gas collecting pipe and improves the desanding effect.

[0022] 3. This utility model provides a sand removal and separation device for gas wells, which sets up a sand filtering mechanism in the gas collecting pipe to perform secondary separation of the gas flow and further improve the separation effect;

[0023] 4. This utility model provides a sand removal and separation device for gas wells. The sand filtering mechanism can rotate relative to the gas collecting pipe under the action of airflow, so that solid sand and gravel are not easily attached to the sand filtering mechanism, making the sand filtering mechanism less prone to clogging, reducing the maintenance frequency of the device, and improving the device's performance and efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a sand removal and separation device for gas wells according to the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the air collecting pipe, the sand filtering mechanism, and the sand scraping mechanism described in this utility model.

[0026] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.

[0027] Marked in the image:

[0028] 1-Tank body, 11-Inlet pipe, 12-Sand discharge pipe, 2-Gas collection pipe, 21-Swirl vane, 3-Sand filtering mechanism, 31-Rotating frame, 311-Rotating shaft, 312-Turntable, 313-Horizontal bar, 314-Hollowed part, 32-Filter screen, 33-Fan blade, 4-Sand scraping mechanism, 41-Base, 42-Brush bristles, 5-Buffer box, 6-Exhaust pipe, 7-Support, 8-Sand collection box, 81-Drawer structure. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0030] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0032] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0033] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0034] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0035] Example 1

[0036] like Figures 1-3 As shown, a sand separation device for gas wells includes a tank 1, a vortex vane 21, and a sand filtering mechanism 3. The side wall of the tank 1 is provided with an air inlet pipe 11, the top of the tank 1 is provided with an air collecting pipe 2, and the bottom of the tank 1 is provided with a sand discharge pipe 12. The air collecting pipe 2 extends vertically into the tank 1. The vortex vane 21 is provided on the outer wall of the air collecting pipe 2, forming a spiral guide groove on the air collecting pipe 2. The top of the spiral guide groove is aligned with the air inlet pipe 11. The sand filtering mechanism 3 is rotatably disposed inside the air collecting pipe 2.

[0037] Tank 1 is the main body of the sand removal and separation device. When in use, the airflow enters the tank 1 through the air inlet pipe 11 and exits the tank 1 through the air collection pipe 2. Solid impurities, such as sand and gravel, separated in the airflow are output from the sand discharge pipe 12.

[0038] In an optional embodiment, the tank 1 can be a vertical tank 1 or a box structure with a sufficiently large internal cavity.

[0039] In an optional embodiment, the distance by which the gas collecting pipe 2 extends into the tank 1 defines the length of the flow path and the flow time of the airflow within the tank 1.

[0040] In an optional embodiment, the gas collecting pipe 2 can extend into the tank 1 and extend beyond half the height line of the tank 1, so that the bottom inlet of the gas collecting pipe 2 is closer to the bottom of the tank 1 and further away from the air inlet pipe 11, thereby increasing the flow distance of the airflow in the tank 1 and improving the gas-solid separation effect.

[0041] The swirl vane 21 is a spiral blade structure installed on the gas collecting pipe 2 that extends into the tank body 1. It is used to form a spiral guide groove on the gas collecting pipe 2 so that the airflow flows spirally from top to bottom along the spiral guide groove.

[0042] In an optional embodiment, the swirl vane 21 can be welded to the outer wall of the gas collecting pipe 2.

[0043] In an optional embodiment, the swirl vane 21 can be spirally arranged on the outer wall of the air collecting pipe 2 in a downward inclined state, so that the airflow can be partially blocked by the swirl vane 21 and can flow along the spiral guide groove.

[0044] like Figure 2 As shown, the sand filtering mechanism 3 is installed inside the air collecting pipe 2 and is used to perform secondary sand removal treatment on the airflow passing through the air collecting pipe 2.

[0045] In one or more embodiments, the sand filtering mechanism 3 includes a rotating frame 31 and a filter screen 32. The filter screen 32 is disposed at the bottom end of the rotating frame 31, and the rotating frame 31 is rotatably engaged with the air collecting pipe 2.

[0046] In an optional embodiment, the rotating frame 31 may include a rotating shaft 311, with a turntable 312 connected to the top and a crossbar 313 connected to the bottom. The turntable 312 is provided with a hollow part 314 to ensure smooth airflow. The rotating shaft 311 is provided with fan blades 33. The turntable 312 is rotatably engaged with the air collection pipe 2. The filter screen 32 is connected to the bottom of the crossbar 313, so that the airflow passes through the filter screen 32 and the rotating frame 31 in sequence and is output along the air collection pipe 2. The airflow provides power to the fan blades 33 on the rotating shaft 311, causing the rotating shaft 311 to rotate, thereby driving the rotating frame 31 to rotate relative to the air collection pipe 2, and thus driving the filter screen 32 to rotate.

[0047] In an optional embodiment, the turntable 312 can be a disc or a ring structure, and a hollow part 314 is formed on the turntable 312 to allow for smooth airflow. The air collecting pipe 2 can be a circular pipe, and a local expansion section can be set on the air collecting pipe 2 at the position corresponding to the turntable 312, so that the turntable 312 can be set on the expansion section to facilitate the relatively stable rotational cooperation between the rotating frame 31 and the air collecting pipe 2.

[0048] In an optional implementation, the enlarged section can be a combination of two pipe sections connected by flanges.

[0049] In an optional embodiment, a bearing may be nested between the outer wall of the turntable 312 and the inner wall of the gas collecting pipe 2.

[0050] In an optional embodiment, the crossbar 313 may be a rod perpendicular to the pivot 311, and the filter screen 32 may be connected to the lower part of the crossbar 313.

[0051] In an optional embodiment, the filter screen 32 can be a cone shape that is larger at the top and smaller at the bottom, which can increase the filtration area of ​​the filter screen 32 and improve the filtration effect.

[0052] In one or more embodiments, a sand-scraping mechanism 4 is provided inside the air collecting pipe 2, which can fit against the outer wall of the filter screen 32. This mechanism can remove sand and gravel from the filter screen 32, preventing fine sand from accumulating on it, thus achieving automatic cleaning of the filter screen 32, ensuring its long-term use, and thereby improving the efficiency of the device.

[0053] In an optional embodiment, the scraping mechanism 4 may include a base 41 on which bristles 42 are provided.

[0054] In an optional embodiment, the substrate 41 can be any one of a rod, a plate, or a roller.

[0055] The buffer box 5 is connected to the gas collecting pipe 2 and is used to buffer the airflow output from the gas collecting pipe 2. The internal cavity is larger than that of the gas collecting pipe 2, so that the airflow speed is reduced after entering the buffer box 5, which is conducive to the sedimentation of impurities and facilitates stable and high-quality airflow delivery.

[0056] In one or more embodiments, the top end of the gas collecting pipe 2 is connected to a buffer box 5, and the buffer box 5 is connected to an exhaust pipe 6. The gas collecting pipe 2 and the exhaust pipe 6 are perpendicular to each other. This allows the output airflow to enter the larger space of the buffer box 5 from the pipe, where the speed is reduced, and impurities can be further settled, thus improving the quality of the output airflow.

[0057] In one or more embodiments, the bottom and top of the tank 1 are respectively provided in a bucket shape to facilitate the guidance of airflow.

[0058] In an optional embodiment, a valve may be provided at the bottom of the tank 1 or on the sand discharge pipe 12. This allows for convenient control of the output of impurities from the tank 1 via the valve.

[0059] In one or more embodiments, the tank body 1 is mounted on the support 7, and the bottom of the tank body 1 is connected to the sand collection box 8 via the sand discharge pipe 12. The sand collection box 8 is mounted on the support 7. The support 7 provides stable support for the tank body 1, and the sand collection box 8 collects impurities discharged from the sand discharge pipe 12.

[0060] In an optional embodiment, the sand collection box 8 may be provided with a drawer structure 81. The drawer structure 81 may be a pull-out drawer provided in an opening on the sand collection box 8. The drawer structure 81 can be easily pulled out or pushed in from the sand collection box 8, making it convenient to clean impurities in the sand collection box 8.

[0061] This embodiment of a desanding and separation device for gas wells uses a vortex vane 21 to agitate the airflow input from the inlet pipe 11, causing the airflow to spiral downwards along the spiral guide groove, accelerating gas-solid separation. Coarse sand can be effectively settled. Then, after passing through the spiral guide groove, the airflow enters the gas collecting pipe 2 from the bottom end, where the flow direction changes abruptly. Most of the solids can continue to fall downwards under inertia and are then output from the sand discharge pipe 12. This reduces the amount of solids entering the gas collecting pipe 2, improving the desanding effect. Simultaneously, a filter sand is installed inside the gas collecting pipe 2. Mechanism 3 performs secondary separation of the airflow, further removing fine sand from the airflow and improving the separation effect. The sand filter mechanism 3 can rotate relative to the air collection pipe 2 under the action of the airflow, making it less likely for solid sand to adhere to the sand filter mechanism 3, preventing clogging, reducing the maintenance frequency of the device, improving the device's performance and efficiency, and further filtering the sand through secondary separation. In conjunction with the sand scraping mechanism 4, it prevents fine sand from accumulating on the filter screen 32, avoiding clogging, ensuring the long-term use of the filter screen 32, and improving the device's efficiency.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sand removal and separation device for gas wells, characterized in that, include: Tank (1), the side wall of the tank (1) is provided with an air inlet pipe (11), the top of the tank (1) is provided with an air collection pipe (2), the bottom of the tank (1) is provided with a sand discharge pipe (12), and the air collection pipe (2) extends into the tank (1); Swirl vane (21), the swirl vane (21) is disposed on the outer wall of the gas collecting pipe (2), and a spiral guide groove is formed on the gas collecting pipe (2), the top end of the spiral guide groove is aligned with the air inlet pipe (11); The sand filtering mechanism (3) is rotatably disposed inside the air collecting pipe (2).

2. The desanding and separation device for gas wells according to claim 1, characterized in that, The sand filtering mechanism (3) includes a rotating frame (31) and a filter screen (32). The filter screen (32) is located at the bottom of the rotating frame (31), and the rotating frame (31) is rotatably engaged with the air collecting pipe (2).

3. The desanding and separation device for gas wells according to claim 2, characterized in that, The rotating frame (31) is provided with fan blades (33) and hollow parts (314).

4. A desanding and separation device for gas wells according to claim 3, characterized in that, The rotating frame (31) includes a rotating shaft (311), the top of which is connected to a turntable (312) and the bottom of which is connected to a crossbar (313). The hollow part (314) is provided on the turntable (312). The turntable (312) is rotatably engaged with the air collection pipe (2). The filter screen (32) is connected to the bottom of the crossbar (313).

5. A desanding and separation device for gas wells according to claim 4, characterized in that, The filter (32) is cone-shaped, with a larger top and a smaller bottom.

6. A desanding and separation device for gas wells according to claim 5, characterized in that, The gas collecting pipe (2) is equipped with a sand scraping mechanism (4), which is attached to the outer wall of the filter screen (32).

7. A desanding and separation device for gas wells according to claim 6, characterized in that, The scraping mechanism (4) includes a base (41) on which bristles (42) are provided.

8. A desanding and separation device for gas wells according to claim 7, characterized in that, The substrate (41) includes a rod, a plate, or a roller.

9. A desanding and separation device for gas wells according to any one of claims 1-8, characterized in that, The top of the gas collecting pipe (2) is connected to the buffer box (5), and the buffer box (5) is connected to the exhaust pipe (6). The gas collecting pipe (2) and the exhaust pipe (6) are perpendicular to each other.

10. A desanding and separation device for gas wells according to any one of claims 1-8, characterized in that, The bottom and top of the tank (1) are respectively set in the shape of a bucket. The tank (1) is set on the support (7). The bottom of the tank (1) is connected to the sand collection box (8) through the sand discharge pipe (12). The sand collection box (8) is set on the support (7). The sand collection box (8) is provided with a drawer structure (81).

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