Desanding device for unconventional gas exploitation

Abstract

The invention relates to the technical field of unconventional gas desanding equipment, and particularly discloses a desanding device for unconventional gas exploitation, which comprises a shell, the shell is provided with a gas inlet, a drain outlet and a gas outlet, and the shell is internally provided with a separation mechanism for desanding; the separating mechanism comprises a first separating plate and a second separating plate, the second separating plate is arranged above the first separating plate, and the first separating plate is arranged above the air inlet; the central position of the first separation plate is higher than the edge of the first separation plate, so that a gas gathering space is formed at the lower part of the first separation plate, and the second separation plate and the first separation plate have the same shape; a plurality of first separation holes are formed in the first separation plate and vertically penetrate through the first separation plate, and a plurality of second separation holes are formed in the second separation plate and vertically penetrate through the second separation plate. According to the invention, not only can fluid containing unconventional gas be subjected to desanding treatment so as to solve the problem of erosion of gravel to pipeline equipment, but also the desanding efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of unconventional gas desanding equipment, and in particular to a desanding device for unconventional gas exploitation. Background Art

[0002] Energy is an important material basis for social and economic development. The level of energy utilization is also an important indicator of the level of social and economic development of various countries. The natural gas development strategy is an important part of my country's energy development strategy.

[0003] Unconventional gas is natural gas directly stored in rocks, with methane as its main component, and is a recoverable natural gas resource. The extraction of unconventional gas mainly uses hydraulic fracturing fluid to hydraulically fracture rocks, so that the natural gas stored in the rocks can be released. Therefore, during the unconventional gas extraction process, the fluid carries some formation sand, and there are many elbows, needle valves and other throttle valves between the wellhead and the gas-liquid separator, which are very likely to fail due to the erosion of solid particles, causing serious damage to the equipment and reducing the efficiency of unconventional gas extraction.

[0004] Therefore, it is necessary to design a desanding device, through which the fluid containing unconventional gas is desanded and then enters the gas-liquid separator through a pipeline. Summary of the invention

[0005] The purpose of the present invention is to provide a desanding device for unconventional gas development, which can not only desand the fluid containing unconventional gas to improve the erosion problem of gravel on pipeline equipment and improve the work efficiency of unconventional gas development, but also has high desanding efficiency.

[0006] The present invention is achieved through the following technical solutions:

[0007] A desanding device for unconventional gas mining comprises a shell, the shell is provided with an air inlet, a sewage outlet and an air outlet, a separation mechanism for desanding is provided in the shell; the separation mechanism comprises a first separation plate and a second separation plate, the second separation plate is arranged above the first separation plate, and the first separation plate is arranged above the air inlet;

[0008] The height of the center position of the first separation plate is higher than the height of the edge, so that a gas gathering space is formed at the lower part of the first separation plate, and the second separation plate has the same shape as the first separation plate;

[0009] The first separation plate is provided with a plurality of first separation holes, which vertically penetrate the first separation plate. The second separation plate is provided with a plurality of second separation holes, which vertically penetrate the second separation plate.

[0010] The gas gathering space described in the present invention specifically refers to the first separation plate being a flat plate structure, the first separation plate being a structure that bulges upward in the center, and the gas gathering space being a structure that gradually contracts from bottom to top.

[0011] The first separation plate of the present invention is equivalent to the first-stage separation mechanism; the second separation plate is equivalent to the second-stage separation mechanism; the first separation plate and the second separation plate constitute a secondary separation mechanism to achieve sand removal treatment of the fluid containing unconventional gas, so as to improve the erosion problem of pipeline equipment by sand and gravel and improve the work efficiency of unconventional gas extraction.

[0012] The height of the center position of the first separation plate of the present invention is higher than the height of the edge, so that a gas gathering space is formed at the bottom of the first separation plate. The second separation plate has the same shape as the first separation plate, that is, the first separation plate and the second separation plate are non-flat structures, and the shapes of the first separation plate and the second separation plate are similar to inverted bowl structures. Compared with the flat separation plate, the first separation plate and the second separation plate arranged in a bowl shape have a guiding effect on the gas. When the unconventional gas moves from bottom to top, part of the unconventional gas can directly pass through the first separation hole and the second separation hole, and another part of the unconventional gas will be blocked by the non-porous area. It can gradually move along the inclined lower surface of the first separation plate and the second separation plate to the first separation hole and the second separation hole and then pass through, instead of spending time staying under the first separation plate and the second separation plate; and the first separation plate and the second separation plate arranged in a bowl shape have a gathering effect on the gas, which can increase the gas pressure of the unconventional gas inside the first separation plate and the second separation plate to increase its passing rate, and thus the desanding efficiency of the desanding device used for unconventional gas exploitation of the present invention is high.

[0013] Furthermore, the aperture of the first separation hole is larger than that of the second separation hole; the first separation hole and the second separation hole with different apertures are beneficial to improving the separation effect of formation sand particles in the liquid phase.

[0014] Furthermore, the pore size of the first separation hole is 100-120 μm, and the pore size of the second separation hole is 50-60 μm.

[0015] Further, the first separation plate includes a top plate, an annular bottom plate and a frustoconical middle section;

[0016] The top plate is located on the central axis of the shell, and the outer side wall of the annular bottom plate is connected to the inner wall of the shell; the top and bottom of the middle section of the truncated cone are connected to the top plate and the annular bottom plate respectively.

[0017] Preferably, the top plate, the annular bottom plate and the frustum middle section are an integrated structure.

[0018] Furthermore, it also includes a cleaning mechanism; the cleaning mechanism includes a rotating shaft, a first fixed bearing, a second fixed bearing, a first scraper and a second scraper;

[0019] The rotating shaft rotates under the driving of external force;

[0020] The first fixed bearing and the second fixed bearing are arranged on the rotating shaft, the first fixed bearing is connected to the first separation plate, and the first fixed bearing and the first separation plate are arranged coaxially; the second fixed bearing is connected to the second separation plate, and the second fixed bearing and the second separation plate are arranged coaxially;

[0021] The first scraper and the second scraper are both arranged on the rotating shaft, and the first scraper and the second scraper are used to scrape particles on the first separation plate and the second separation plate respectively.

[0022] Furthermore, two first scrapers are provided, and the two first scrapers are respectively fitted with the upper end surface and the lower end surface of the first separation plate, and one second scraper is provided, and the second scraper is fitted with the lower end surface of the second separation plate.

[0023] Furthermore, bristles are provided on both the first scraper and the second scraper. The bristles on the first scraper are used to clean the first separation hole; and the bristles on the second scraper are used to clean the second separation hole.

[0024] Furthermore, a turbine is provided at the lower end of the rotating shaft, and the turbine is arranged opposite to the air inlet; the high-pressure fluid will impact the blades of the turbine, drive the turbine to rotate, and thus drive the rotating shaft to rotate.

[0025] Furthermore, first sealing rings are arranged at both ends of the first fixed bearing on the rotating shaft, the inner wall of the first sealing ring is in close contact with the outer wall of the rotating shaft, and the outer wall of the first sealing ring is connected to the first separation plate. That is, the first sealing ring is used to achieve sealing of the first fixed bearing.

[0026] Furthermore, a second sealing ring is provided at both ends of the second fixed bearing on the rotating shaft, the inner wall of the second sealing ring is in close contact with the outer wall of the rotating shaft, and the outer wall of the second sealing ring is connected to the second separation plate, that is, the second sealing ring is used to seal the second fixed bearing.

[0027] Furthermore, the gas outlet is connected to the gas-liquid separator through a pipeline, and an air pump is arranged on the pipeline.

[0028] Furthermore, the sewage outlet is connected to a sewage removal device.

[0029] Furthermore, the sewage outlet and the air outlet are respectively arranged at the bottom and the top of the shell; the air inlet is arranged on the side wall of the shell, and an air inlet pipe is arranged in the air inlet, and the air inlet pipe is used to introduce the fluid containing unconventional gas into the interior of the shell.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] 1. The desanding device for unconventional gas development of the present invention adopts a two-stage separation mechanism, which can not only remove sand from the fluid containing unconventional gas to improve the erosion problem of pipeline equipment by gravel and improve the working efficiency of unconventional gas development, but also has a good desanding effect. At the same time, the lower parts of the first separation plate and the second separation plate of the present invention form a gas gathering space, so that the first separation plate and the second separation plate have a gathering effect on the gas, which can increase the gas pressure of the unconventional gas inside the first separation plate and the second separation plate to increase its passing rate, and thus the desanding efficiency of the desanding device for unconventional gas development of the present invention is high.

[0032] 2. The present invention utilizes a vacuum pump to attract the gas phase to rise. During the rising process of the gas phase, a primary separation mechanism and a secondary separation mechanism are utilized to separate the formation sand particles of different sizes mixed in the gas phase. At the same time, a cleaning mechanism is utilized to clean the primary separation mechanism and the secondary separation mechanism to avoid blockage of the primary separation mechanism and the secondary separation mechanism, so that the sand removal device can work uninterruptedly, thereby achieving the effect of improving the erosion problem of sand and gravel on pipelines and equipment and improving the working efficiency of unconventional gas extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0034] Figure 1 It is a schematic diagram of the overall structure of the sand removal device of the present invention;

[0035] Figure 2 It is a schematic diagram of the internal structure of the shell of the present invention.

[0036] Marks and corresponding parts names in the attached drawings:

[0037] 1. Shell; 11. Air inlet; 111. Air inlet pipe; 12. Sewage outlet; 121. Sewage removal equipment; 13. Air outlet; 131. Air pump; 132. Gas-liquid separator; 2. First separation plate; 21. First separation hole; 22. First sealing ring; 3. Second separation plate; 31. Second separation hole; 32. Second sealing ring; 4. Cleaning mechanism; 41. Rotating shaft; 42. Turbine; 43. First fixed bearing; 44. Second fixed bearing; 45. First scraper; 46. Second scraper; 5. Bristles. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0039] Embodiment 1:

[0040] like Figure 1 , Figure 2 As shown, a sand removal device for unconventional gas mining includes a shell 1, on which an air inlet 11, a drain port 12 and an air outlet 13 are provided. An air inlet pipe 111 is provided in the air inlet 11, and the air inlet pipe 111 is used to introduce a fluid containing unconventional gas into the shell 1, the drain port 12 is used to guide the separated particles out of the shell 1, and the air outlet 13 is used to guide the separated gas out of the shell 1. In a preferred arrangement, the drain port 12 and the air outlet 13 are respectively arranged at the bottom and the top of the shell 1; the air inlet 11 is arranged on the side wall of the shell 1.

[0041] A separation mechanism for removing sand is arranged in the housing 1; the separation mechanism comprises a first separation plate 2 and a second separation plate 3, the second separation plate 3 is arranged above the first separation plate 2, and the first separation plate 2 is arranged above the air inlet 11;

[0042] The height of the center position of the first separation plate 2 is higher than the height of the edge, so that the lower part of the first separation plate 2 forms a gas gathering space, and the second separation plate 3 has the same shape as the first separation plate 2; that is, the shapes of the first separation plate 2 and the second separation plate 3 are similar to an inverted bowl-shaped structure. In a specific implementation, the first separation plate 2 includes a top plate, an annular bottom plate and a truncated cone middle section; the top plate is located on the central axis of the shell 1, and the outer side wall of the annular bottom plate is connected to the inner wall of the shell 1; the top and bottom of the truncated cone middle section are respectively connected to the top plate and the annular bottom plate, and the top plate, the annular bottom plate and the truncated cone middle section can be an integrally formed structure. The purpose of setting the annular bottom plate is to facilitate the connection of the first separation plate 2 and the second separation plate 3 with the shell 1. More specifically, the specific shape of the shell 1 can be a hollow cylindrical shape, that is, the horizontal cross-section of the internal space of the shell 1 is circular, the top plate is also circular, the annular bottom plate is a circular ring, and the top and bottom of the truncated cone middle section are both circular.

[0043] The first separation plate 2 is provided with a plurality of first separation holes 21, which vertically penetrate the first separation plate 2, and the second separation plate 3 is provided with a plurality of second separation holes 31, which vertically penetrate the second separation plate 3. In a preferred case, the aperture of the first separation hole 21 is larger than the aperture of the second separation hole 31, and the first separation holes 21 and the second separation holes 31 of different apertures are used to improve the separation effect of the formation sand particles in the liquid phase. Specifically, the aperture of the first separation hole 21 is 100-120 μm, and the aperture of the second separation hole 31 is 50-60 μm, and the first separation hole 21 or the second separation hole 31 is arranged on the top plate, the annular bottom plate and the middle section of the truncated cone.

[0044] Compared with the flat separation plate, the bowl-shaped first separation plate 2 and the second separation plate 3 have a guiding effect on the gas. When the unconventional gas moves from bottom to top, part of the unconventional gas can directly pass through the first separation hole 21 and the second separation hole 31, and another part of the unconventional gas will be blocked by the non-porous part. It can gradually move along the inclined lower surface of the first separation plate 2 and the second separation plate 3 to the first separation hole 21 and the second separation hole 31 and then pass through, instead of spending time staying under the first separation plate 2 and the second separation plate 3; and the bowl-shaped first separation plate 2 and the second separation plate 3 have a gathering effect on the gas, which can increase the gas pressure of the unconventional gas inside the first separation plate 2 and the second separation plate 3 to increase its passage rate.

[0045] In a preferred case, the air outlet 13 is connected to the gas-liquid separator 132 through a pipeline, and an air pump 131 is provided on the pipeline; the sewage outlet 12 is connected to the pollution removal equipment 121; the pollution removal equipment 121 is used to treat the mixed liquid phase and solid phase; the top of the shell 1 is provided with an air outlet 13, and the air outlet 13 is connected to the air pump 131 and the gas-liquid separator 132 in sequence, and the air pump 131 is used to increase the upward traction of the gas phase, and the gas-liquid separator 132 is used to separate the gas phase and the liquid phase.

[0046] In this embodiment, an air inlet 11, an air inlet pipe 111, a sewage outlet 12, an air outlet 13, a primary separation mechanism, a secondary separation mechanism and a cleaning mechanism are provided, and an air pump 131 and a gas-liquid separator 132 are provided outside the air outlet 12, and a pollution removal device 121 is provided outside the sewage outlet 12. The high-pressure fluid in the well enters the shell 1 through the air inlet pipe 111. Due to gravity, the liquid phase and the solid phase will fall downward and be discharged from the sewage outlet 12 to the pollution removal device 121, while the gas phase will remain in the shell 1. The air pump 131 is used to attract the gas phase to rise. During the rising process of the gas phase, the primary separation mechanism and the secondary separation mechanism are used to separate the formation sand particles of different sizes mixed in the gas phase.

[0047] Embodiment 2:

[0048] like Figure 1 , Figure 2 As shown, this embodiment is based on embodiment 1, and the sand removal device 5 used in unconventional gas mining also includes a cleaning mechanism 4; the cleaning mechanism 4 includes a rotating shaft 41, a first fixed bearing 43, a second fixed bearing 44, a first scraper 45 and a second scraper 46.

[0049] The rotating shaft 41 rotates under the drive of external force; one implementation method is: a turbine 42 is arranged at the lower end of the rotating shaft 41, and the turbine 42 is arranged opposite to the air inlet 11; that is, the turbine 42 is connected to the end of the rotating shaft 41 close to the air inlet pipe 111, and the blades of the turbine 42 are opposite to the air inlet pipe 111. When the high-pressure fluid in the well enters the shell 1 through the air inlet pipe 111, the high-pressure fluid will impact the blades of the turbine 42, drive the turbine 42 to rotate, and thus drive the rotating shaft 41 to rotate.

[0050] The first fixed bearing 43 and the second fixed bearing 44 are arranged on the rotating shaft 41, the first fixed bearing 43 is connected to the first separation plate 2, and the first fixed bearing 43 is coaxially arranged with the first separation plate 2; the second fixed bearing 44 is connected to the second separation plate 3, and the second fixed bearing 44 is coaxially arranged with the second separation plate 3.

[0051] The first scraper 45 and the second scraper 46 are both disposed on the rotating shaft 41 , and the first scraper 45 and the second scraper 46 are used to scrape off particles on the first separation plate 2 and the second separation plate 3 , respectively.

[0052] In a specific embodiment, two first scrapers 45 are provided, and the two first scrapers 45 are respectively in contact with the upper end surface and the lower end surface of the first separation plate 2 . One second scraper 46 is provided, and the second scraper 46 is in contact with the lower end surface of the second separation plate 3 .

[0053] In a preferred case, the first scraper 45 and the second scraper 46 are both provided with bristles 5 , and the bristles 5 on the first scraper 45 are used to clean the first separation hole 21 ; the bristles 5 on the second scraper 46 are used to clean the second separation hole 31 .

[0054] The bristles 5 on the first scraper 45 are arranged in contact with the first separation plate 2, and the bristles 5 on the second scraper 46 are arranged in contact with the second separation plate 3. When the first scraper 45 and the second scraper 46 rotate, the bristles 5 can sweep the formation sand particles in the first separation hole 21 and the second separation hole 31, which is beneficial to improve the cleaning effect of the first separation hole 21 and the second separation hole 31, and prevent the bristles 5 from damaging the surface of the first scraper 45 and the second scraper 46.

[0055] In a preferred case, the first sealing ring 22 is provided at both ends of the first fixed bearing 43 on the rotating shaft 41, the inner wall of the first sealing ring 22 is in close contact with the outer wall of the rotating shaft 41, and the outer wall of the first sealing ring 22 is connected to the first separation plate 2. The second sealing ring 32 is provided at both ends of the second fixed bearing 44 on the rotating shaft 41, the inner wall of the second sealing ring 32 is in close contact with the outer wall of the rotating shaft 41, and the outer wall of the second sealing ring 32 is connected to the second separation plate 3. The first sealing ring 22 and the second sealing ring 32 can improve the sealing performance of the first fixed bearing 43 and the second fixed bearing 44, thereby improving the protection of the first fixed bearing 43 and the second fixed bearing 44.

[0056] The implementation principle of this embodiment is as follows: the high-pressure fluid in the well enters the housing 1 from the air inlet pipe 111, and the liquid phase and the solid phase in the high-pressure fluid fall downward due to gravity and are discharged from the sewage outlet 12 to the external sewage removal device 121, while the gas phase rises by the rising traction provided by the suction pump 131 of the gas outlet 13. During the rising process, the gas phase passes through the first separation plate 2 and the second separation plate 3, and the formation sand particles of different particle sizes in the gas phase are separated by the first separation hole 21 and the second separation hole 31, and finally the gas phase is discharged from the gas outlet 13. To the external gas-liquid separator 132, at the same time, when the high-pressure fluid enters the shell 1, it will impact the blades of the turbine 42, driving the turbine 42 to rotate, and the turbine 42 drives the rotating shaft 41 and the first scraper 45 and the second scraper 46 on the rotating shaft 41 to rotate, and the first scraper 45 and the second scraper 46 respectively clean the first separation plate 2 and the second separation plate 3, and the brushes on the first scraper 45 and the second scraper 46 will sweep the first separation hole 21 and the second separation hole 31, without manual cleaning, which greatly extends the maintenance cycle of the device.

[0057] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0058] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A desanding device for unconventional gas production, comprising a housing (1), wherein the housing (1) is provided with an air inlet (11), a sewage outlet (12) and an air outlet (13), and wherein a separation mechanism for desanding is provided inside the housing (1); characterized in that: The separation mechanism comprises a first separation plate (2) and a second separation plate (3), wherein the second separation plate (3) is arranged above the first separation plate (2), and the first separation plate (2) is arranged above the air inlet (11); The height of the center of the first separation plate (2) is higher than the height of the edge, so that a gas gathering space is formed at the bottom of the first separation plate (2), and the second separation plate (3) has the same shape as the first separation plate (2); The first separation plate (2) is provided with a plurality of first separation holes (21), the first separation holes (21) vertically passing through the first separation plate (2), and the second separation plate (3) is provided with a plurality of second separation holes (31), the second separation holes (31) vertically passing through the second separation plate (3).

2. The desanding device for unconventional gas mining according to claim 1, characterized in that: The aperture of the first separation hole (21) is larger than the aperture of the second separation hole (31).

3. The desanding device for unconventional gas mining according to claim 2, characterized in that: The pore size of the first separation hole (21) is 100-120 μm, and the pore size of the second separation hole (31) is 50-60 μm.

4. The desanding device for unconventional gas mining according to claim 1, characterized in that: The first separation plate (2) comprises a top plate, an annular bottom plate and a frustoconical middle section; The top plate is located on the central axis of the shell (1), and the outer wall of the annular bottom plate is connected to the inner wall of the shell (1); the top and bottom of the middle section of the truncated cone are respectively connected to the top plate and the annular bottom plate.

5. The desanding device for unconventional gas mining according to claim 1, characterized in that: It also includes a cleaning mechanism (4); the cleaning mechanism (4) includes a rotating shaft (41), a first fixed bearing (43), a second fixed bearing (44), a first scraper (45) and a second scraper (46); The rotating shaft (41) rotates under the driving of external force; The first fixed bearing (43) and the second fixed bearing (44) are arranged on the rotating shaft (41); the first fixed bearing (43) is connected to the first separation plate (2), and the first fixed bearing (43) and the first separation plate (2) are arranged coaxially; the second fixed bearing (44) is connected to the second separation plate (3), and the second fixed bearing (44) and the second separation plate (3) are arranged coaxially; The first scraper (45) and the second scraper (46) are both arranged on the rotating shaft (41); the first scraper (45) and the second scraper (46) are used to scrape off particles on the first separation plate (2) and the second separation plate (3), respectively.

6. The desanding device for unconventional gas mining according to claim 5, characterized in that: Two first scrapers (45) are provided, and the two first scrapers (45) are respectively fitted with the upper end surface and the lower end surface of the first separation plate (2); one second scraper (46) is provided, and the second scraper (46) is fitted with the lower end surface of the second separation plate (3).

7. The desanding device for unconventional gas mining according to claim 5, characterized in that: The first scraper (45) and the second scraper (46) are both provided with bristles (5); the bristles (5) on the first scraper (45) are used to clean the first separation hole (21); and the bristles (5) on the second scraper (46) are used to clean the second separation hole (31).

8. The desanding device for unconventional gas mining according to claim 5, characterized in that: A turbine (42) is disposed at the lower end of the rotating shaft (41), and the turbine (42) is disposed opposite to the air inlet (11).

9. The desanding device for unconventional gas mining according to claim 5, characterized in that: A first sealing ring (22) is provided on both ends of the first fixed bearing (43) on the rotating shaft (41), the inner wall of the first sealing ring (22) is in close contact with the outer wall of the rotating shaft (41), and the outer wall of the first sealing ring (22) is connected to the first separation plate (2).

10. The desanding device for unconventional gas mining according to claim 5, characterized in that: A second sealing ring (32) is provided on both ends of the second fixed bearing (44) on the rotating shaft (41), the inner wall of the second sealing ring (32) is in close contact with the outer wall of the rotating shaft (41), and the outer wall of the second sealing ring (32) is connected to the second separation plate (3).

11. The desanding device for unconventional gas mining according to claim 1, characterized in that: The gas outlet (13) is connected to the gas-liquid separator (132) via a pipeline, and an air pump (131) is provided on the pipeline.

12. The desanding device for unconventional gas mining according to claim 1, characterized in that: The sewage outlet (12) is connected to a sewage removal device (121).

13. A desanding device for unconventional gas mining according to any one of claims 1 to 12, characterized in that: The sewage outlet (12) and the air outlet (13) are respectively arranged at the bottom and the top of the shell (1); the air inlet (11) is arranged on the side wall of the shell (1), and an air inlet pipe (111) is arranged inside the air inlet (11), and the air inlet pipe (111) is used to introduce the fluid containing unconventional gas into the interior of the shell (1).

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