Gas-liquid cyclone separation device

Abstract

The present invention belongs to the technical field of oil and gas resource exploitation, and discloses a gas-liquid cyclone separation device, which comprises a gas-liquid cyclone tube. A spiral guide plate is arranged inside the gas-liquid cyclone tube and is uniformly distributed in a circumferentially spiral downward manner along the inner wall thereof. A gas escape tube is arranged inside the gas-liquid cyclone tube, and a long slot is arranged on the gas escape tube; the end of the gas collecting pipe is inserted into the gas escape tube; the liquid collecting and sewage discharging pipe is connected to the lower part of the gas-liquid cyclone tube. A fixed disk is arranged at the upper end of the liquid collecting and sewage discharging pipe. The lower end of the gas escape tube passes through the fixed disk and is communicated with the liquid collecting and sewage discharging pipe. Liquid removal holes are arranged on the fixed disk, and a miscellaneous discharging pipe communicated with the outside is arranged at the bottom of the liquid collecting and sewage discharging pipe. The combination of the gas escape tube and the spiral guide plate is adopted, and centrifugal separation and gravity separation are comprehensively utilized to improve the separation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas resource exploitation, and particularly to a gas-liquid cyclone separation device. Background Art

[0002] During the exploitation and transportation of oil and gas wells, the production fluid with complex components from the bottom of the well is prone to form slug flow, hydrates, etc. during the gathering and transportation process, which will have an adverse impact on the normal operation of equipment and structures such as pipelines and valves. The phase separation technology has become increasingly important. The gas-liquid separation technology is an important part of the phase separation technology. Separating the bottom-hole production fluid through a gas-liquid separation device has many advantages such as reducing equipment costs and improving transportation efficiency.

[0003] Most traditional gas-liquid separation devices are volumetric separation devices mainly based on gravitational settlement separation. This kind of separation device relies on the density difference between the gas-liquid two phases to achieve gravitational separation and requires a long residence time. With the development of oil and gas exploration and development from land to shallow sea and then to deep sea, due to problems such as large volume, low efficiency, and heavy structure, the application of the gravity volumetric gas-liquid separation device has been greatly limited. Gas-liquid cyclone separation equipment is divided into active gas-liquid cyclone separation devices and passive gas-liquid cyclone separation devices according to whether there are moving components inside. The active separation device has a higher separation efficiency than the passive separation device, but there are problems such as dynamic balance and sealing difficulties, as well as the need for power supply under deep-water high-pressure environmental conditions, and it is often restricted in use. At present, the passive gas-liquid cyclone separation device has a poor separation effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas-liquid cyclone separation device, which is smaller in volume and higher in separation and treatment efficiency compared with traditional gravity volumetric gas-liquid separation treatment equipment and traditional passive gas-liquid cyclone separation devices, and at the same time avoids the dynamic balance and sealing difficulties of using a dynamic diversion structure under high-pressure environments.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A gas-liquid cyclone separation device, comprising:

[0007] A gas-liquid cyclone tube, the upper end of the gas-liquid cyclone tube is closed, and a spiral guide plate is arranged inside the gas-liquid cyclone tube and is uniformly distributed in a circumferential spiral downward direction along its inner wall. An inlet pipe is arranged on the gas-liquid cyclone tube;

[0008] A gas escape tube, the gas escape tube is arranged inside the gas-liquid cyclone tube and is arranged along its length direction. The spiral guide plate is arranged between the outer wall of the gas escape tube and the inner wall of the gas-liquid cyclone tube. A long slot is arranged on the gas escape tube;

[0009] The gas collecting pipe, one end of the gas collecting pipe penetrates through the upper end of the gas-liquid cyclone pipe, and the other end is inserted into the gas dispersion pipe;

[0010] The liquid collecting and sewage discharging pipe, the liquid collecting and sewage discharging pipe is connected to the lower part of the gas-liquid cyclone pipe, a fixed disk is arranged at the upper end of the liquid collecting and sewage discharging pipe, the lower end of the gas dispersion pipe passes through the fixed disk and is communicated with the liquid collecting and sewage discharging pipe, the fixed disk abuts against the inner wall of the liquid collecting and sewage discharging pipe, liquid removing holes are arranged on the upper end surface of the fixed disk, the liquid removing holes are arranged circumferentially around the lower end of the gas dispersion pipe, and a miscellaneous discharging pipe communicated with the outside is arranged at the bottom of the liquid collecting and sewage discharging pipe.

[0011] Preferably, the outlet end of the liquid inlet pipe has a wedge-shaped block to form a wedge-shaped tangential outlet, the diameter of the liquid inlet pipe gradually decreases from the inlet end of the liquid inlet pipe to the part entering the gas-liquid cyclone pipe, and the outlet direction of the wedge-shaped tangential outlet forms an angle with the axis of the liquid inlet pipe; the outlet end of the liquid inlet pipe is located between the upper edge of the gas dispersion pipe and the long slot opening.

[0012] Preferably, the long slot opening is arranged circumferentially on the gas dispersion pipe, and the tangential opening at the edge of the long slot opening has the same rotation direction as the spiral guide plate.

[0013] Preferably, the end of the gas collecting pipe is inserted between the upper edge of the gas dispersion pipe and the upper edge of the long slot opening.

[0014] Preferably, the opening direction of the liquid removing holes is the same as the rotation direction of the swirling flow field formed after the spiral guide plate guides the flow.

[0015] Preferably, there is also a conical pipe, the larger opening end of the conical pipe is connected to the fixed disk, the lower end of the gas dispersion pipe passes through the fixed disk and is communicated with the conical pipe, a plurality of liquid collecting holes are arranged on the surface of the conical pipe, and the opening direction of the liquid collecting holes is the same as the rotation direction of the swirling flow field formed after the spiral guide plate guides the flow.

[0016] Preferably, there is also a dirt collecting cylinder, the dirt collecting cylinder is arranged at the inner bottom of the liquid collecting and sewage discharging pipe, there is a gap between the dirt collecting cylinder and the liquid collecting and sewage discharging pipe, the smaller opening end of the conical pipe extends into the dirt collecting cylinder, and the miscellaneous discharging pipe is communicated with the dirt collecting cylinder.

[0017] Preferably, there is also a liquid discharging pipe, and the liquid discharging pipe is communicated with the gap between the dirt collecting cylinder and the liquid collecting and sewage discharging pipe.

[0018] Preferably, there is also an exhaust pipe, the first end of the exhaust pipe is communicated with the liquid collecting and sewage discharging pipe, the second end of the exhaust pipe is communicated with the gas-liquid cyclone pipe, and a control valve is arranged on the exhaust pipe.

[0019] Preferably, the second end of the exhaust pipe is located above the upper edge of the long slot.

[0020] Advantages of the present invention:

[0021] By combining a gas escape pipe and a spiral guide plate, and utilizing centrifugal separation and gravity separation, gas-liquid centrifugal separation occurs on the spiral guide plate. At the same time, when the phenomenon of gas carrying liquid occurs, gravity separation can be carried out through the gas escape pipe structure and the gas collecting pipe, reducing the liquid content rate and improving the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the gas-liquid cyclone separation device of the present invention installed on a base;

[0023] Figure 2 It is a front view of the gas-liquid cyclone separation device of the present invention;

[0024] Figure 3 It is a sectional view of the gas-liquid cyclone separation device of the present invention;

[0025] Figure 4 It is a schematic diagram of the gas escape pipe communicating with the conical pipe and the gas collecting pipe in the gas-liquid cyclone separation device of the present invention;

[0026] Figure 5 It is a schematic diagram of the fixing disk in the gas-liquid cyclone separation device of the present invention;

[0027] Figure 6 It is a schematic diagram of the installation of the liquid inlet pipe and the wedge block in the gas-liquid cyclone separation device of the present invention;

[0028] Figure 7 It is a schematic diagram of the wedge block in the gas-liquid cyclone separation device of the present invention.

[0029] In the figure:

[0030] 1 - gas-liquid cyclone tube; 2 - spiral guide plate; 3 - liquid inlet pipe; 31 - wedge block; 4 - gas escape pipe; 41 - long slot; 5 - gas collecting pipe; 6 - liquid collecting and sewage draining pipe; 7 - conical pipe; 71 - liquid collecting hole; 8 - fixing disk; 81 - liquid removing hole; 9 - impurity discharging pipe; 10 - impurity collecting cylinder; 11 - liquid discharging pipe; 12 - exhaust pipe; 13 - control valve; 14 - base; 15 - universal wheel. DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, not all structures.

[0032] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and over", and "on the upper side" of the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "on the lower side" of the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0034] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0035] As Figure 1-7 shown, this embodiment provides a gas-liquid cyclone separation device, which includes a gas-liquid cyclone tube 1. A spiral guide plate 2 is arranged inside the gas-liquid cyclone tube 1 and is evenly distributed in a circumferential spiral and downward direction along its inner wall. A liquid inlet tube 3 is arranged on the gas-liquid cyclone tube 1. A gas escape tube 4 is arranged inside the gas-liquid cyclone tube 1 and is arranged along the length direction of the gas cyclone tube 1. The spiral guide plate 2 is arranged between the outer wall of the gas escape tube 4 and the inner wall of the gas-liquid cyclone tube 1. A long slot 41 is arranged on the gas escape tube 4. A gas collecting tube 5 is inserted into the upper end of the gas-liquid cyclone tube 1, and the end of the gas collecting tube 5 is inserted into the gas escape tube 4. It also has a liquid collecting and sewage discharging tube 6, and the liquid collecting and sewage discharging tube 6 is connected to the lower part of the gas-liquid cyclone tube 1. A fixing plate 8 is arranged at the upper end of the liquid collecting and sewage discharging tube 6, and the fixing plate 8 abuts against the inner wall of the liquid collecting and sewage discharging tube 6. The lower end of the gas escape tube 4 passes through the fixing plate 8 and is communicated with the liquid collecting and sewage discharging tube 6. Liquid removing holes 81 are arranged on the fixing plate 8 and are arranged circumferentially around the lower end of the gas escape tube 4. A waste discharging tube 9 communicating with the outside is arranged at the bottom of the liquid collecting and sewage discharging tube 6.

[0036] The gas escape pipe 4 and the spiral guide plate 2 are combined, and centrifugal separation and gravity separation are comprehensively utilized. Centrifugal separation of gas-liquid occurs on the spiral guide plate 2, and at the same time, when the gas-carrying liquid phenomenon occurs, gravity separation can be carried out through the structure of the gas escape pipe 4 and the gas collecting pipe 5, reducing the liquid content rate and improving the separation efficiency.

[0037] The following details this embodiment. As Figure 1 、 Figure 2 and Figure 3 shown, the gas-liquid cyclone separation device includes a gas-liquid cyclone tube 1 with a closed upper end. A spiral guide plate 2 is arranged inside the gas-liquid cyclone tube 1 and is uniformly distributed in a circumferential spiral shape downward along its inner wall. A liquid inlet pipe 3 is arranged on the gas-liquid cyclone tube 1. In this embodiment, the liquid inlet pipe 3 is arranged above the spiral guide plate 2; when the liquid enters through the liquid inlet pipe 3 and rotates downward along the spiral guide plate 2, a swirling flow field can be formed, and the gas-liquid is separated by centrifugal force. A gas escape pipe 4 is arranged inside the gas-liquid cyclone tube 1, and the gas escape pipe 4 is arranged along the length direction of the gas-liquid cyclone tube 1. The spiral guide plate 2 is arranged between the outer wall of the gas escape pipe 4 and the inner wall of the gas-liquid cyclone tube 1. A long slot 41 is arranged on the gas escape pipe 4, and the gas collecting pipe 5 is arranged at the upper end of the gas-liquid cyclone tube 1 and is inserted into the gas escape pipe 4. After the gas-liquid forms a swirling flow field to achieve gas-liquid separation, part of the gas flows upward along the outer wall of the gas escape pipe 4 to the upper part of the gas-liquid cyclone tube 1, and the other part directly discharges through the long slot 41 from the gas collecting pipe 5 inserted into the gas escape pipe 4, and the liquid moves downward due to gravity. Specifically, the long slot 41 is circumferentially arranged on the gas escape pipe 4, and the tangential opening at the edge of the slot of the long slot 41 has the same rotation direction as the spiral guide plate 2 to facilitate the entry of gas.

[0038] Furthermore, the end of the gas collecting pipe 5 is inserted between the upper edge of the upper end of the gas escape pipe 4 and the upper edge of the long slot 41. It can be understood that the outer diameter of the gas collecting pipe 5 is smaller than the inner diameter of the gas escape pipe 4; when the upper part of the gas-liquid cyclone tube 1 is filled with gas, a negative pressure area will be formed at the junction of the gas escape pipe 4 and the gas collecting pipe 5, and the negative pressure in the negative pressure area can accelerate the discharge of the already separated gas inside through the gas collecting pipe 5 to improve the exhaust efficiency.

[0039] As Figure 2 、 Figure 3 、 Figure 6 and Figure 7As shown, further, the outlet end of the liquid inlet pipe 3 has a wedge-shaped block 31 to form a wedge-shaped tangential outlet. As a result, the inner diameter of the liquid inlet pipe 3 gradually decreases from the inlet end of the liquid inlet pipe 3 to the inlet of the gas-liquid cyclone pipe 1. The outflow direction of the wedge-shaped tangential outlet of the liquid inlet pipe 3 forms an angle with the axial direction of the liquid inlet pipe 3. When the gas-liquid enters the gas-liquid cyclone pipe 1 along the axial direction of the liquid inlet pipe 3, the liquid flows through the wedge-shaped block 31 from the full pipe flow and enters the gas-liquid cyclone pipe 1 tangentially in the form of a semi-circular full pipe, increasing the flow velocity of the gas-liquid before entering the gas-liquid cyclone pipe 1, thereby further improving the efficiency of gas-liquid separation. Further, the outlet end of the liquid inlet pipe 3 is located between the upper edge of the gas escape pipe 4 and the long slot 41 to avoid the remixing of the fluid to be separated and the separated fluid, avoid disturbing the already formed swirl field, make the swirl field more symmetric and stable, and thus improve the separation efficiency.

[0040] As Figure 3 shown, the gas-liquid cyclone separation device has a liquid collection and sewage discharge pipe 6. The liquid collection and sewage discharge pipe 6 is connected to the lower part of the gas-liquid cyclone pipe 1. A waste discharge pipe 9 communicating with the outside is provided at the bottom of the liquid collection and sewage discharge pipe 6. A control valve 13 is also provided on the waste discharge pipe 9 to control the discharge progress. In this embodiment, the control valve 13 is a ball valve. Specifically, as Figure 3-5 shown, a fixing plate 8 is provided at the upper end of the liquid collection and sewage discharge pipe 6. The fixing plate 8 abuts against the inner wall of the upper end of the liquid collection and sewage discharge pipe 6. Liquid removal holes 81 are provided on the upper end surface of the fixing plate 8 and are circumferentially arranged around the lower end of the gas escape pipe 4. After gas-liquid separation, the liquid enters the liquid collection and sewage discharge pipe 6 through the liquid removal holes 81 on the fixing plate 8. In the embodiment, the opening direction of the liquid removal holes 81 is the same as the swirl direction of the swirl field formed after the spiral guide plate 2 guides the flow, so that the liquid can continue to rotate downward along the original rotation route.

[0041] In addition, in order to facilitate the separation of impurities, a tapered pipe 7 is also provided in the liquid collection and sewage discharge pipe 6. The larger opening end of the tapered pipe 7 is connected to the fixing plate 8. The lower end of the gas escape pipe 4 passes through the fixing plate 8 and communicates with the tapered pipe 7. It should be noted that the gas escape pipe 4, the fixing plate 8 and the tapered pipe 7 can be integrally formed up and down and communicate with each other, which is convenient for processing. A plurality of liquid collection holes 71 are provided on the surface of the tapered pipe 7, and the opening direction of the liquid collection holes 71 is the same as the swirl direction of the swirl field formed after the spiral guide plate 2 guides the flow. If there are a small amount of solid particle impurities in the liquid at this time, when the liquid passes through the liquid removal holes 81, it can enter the tapered pipe 7 through some of the liquid collection holes 71 located in the upper part. The liquid rotates in the tapered pipe 7 and is centrifugally separated. The liquid is thrown out from the liquid collection holes 71 at the lower part of the tapered pipe 7, and the impurities fall from the lower opening of the tapered pipe 7 and are discharged through the waste discharge pipe 9. In this embodiment, the taper of the tapered pipe 7 is less than 15°. The tapered pipe 7 can separate the impurities in the liquid and improve the separation efficiency.

[0042] Among them, as Figure 3As shown in the figure, a dirt collection cylinder 10 is provided inside the liquid collection and sewage discharge pipe 6. The dirt collection cylinder 10 is arranged at the bottom inside the liquid collection and sewage discharge pipe 6, and there is a gap between the dirt collection cylinder 10 and the liquid collection and sewage discharge pipe 6. The smaller opening end of the conical pipe 7 extends into the dirt collection cylinder 10, and the impurity discharge pipe 9 communicates with the dirt collection cylinder 10. Impurities fall from the lower opening of the conical pipe 7 into the dirt collection cylinder 10, and the separated liquid is then thrown out from the liquid collection holes 71 at the lower part of the conical pipe 7 and enters the gap between the dirt collection cylinder 10 and the liquid collection and sewage discharge pipe 6.

[0043] In addition, as Figure 1 and Figure 2 shown, the gas-liquid cyclone separation device further includes a liquid discharge pipe 11. The liquid discharge pipe 11 communicates with the gap between the dirt collection cylinder 10 and the liquid collection and sewage discharge pipe 6 to discharge the liquid separated from the conical pipe 7. Further, the gas-liquid cyclone separation device further includes an exhaust pipe 12. The first end of the exhaust pipe 12 communicates with the liquid collection and sewage discharge pipe 6. In this embodiment, the height of the first end of the exhaust pipe 12 is higher than the height of the liquid discharge pipe 11 to facilitate exhaust. The second end of the exhaust pipe 12 communicates with the gas-liquid cyclone pipe 1, and a control valve 13 is provided on the exhaust pipe 12. Specifically, the second end of the exhaust pipe 12 is located above the upper edge of the long slot 41. When gas enters the liquid collection and sewage discharge pipe 6 during separation, the control valve 13 on the exhaust pipe 12 is opened, and finally it enters the gas collection pipe 5.

[0044] As Figure 1 shown, in this embodiment, the gas-liquid cyclone separation device further includes a base 14. The liquid collection and sewage discharge pipe 6 is arranged on the upper end surface of the base 14, and universal wheels 15 are arranged on the lower end surface of the base 14 to facilitate movement.

[0045] The present invention comprehensively utilizes centrifugal separation and gravity separation. Gas-liquid enters the gas-liquid cyclone pipe 1 from the liquid inlet pipe 3. When the gas-liquid mixture flows through the spiral guide plate 2, a swirling flow field is formed. In the swirling flow field, gas-liquid is separated due to different centrifugal forces caused by different densities. The liquid is distributed near the pipe wall of the gas-liquid cyclone pipe 1, and the gas is distributed in the center of the gas-liquid cyclone pipe 1.

[0046] When the liquid swirls to the fixed disk 8, the liquid distributed near the pipe wall enters the conical pipe 7 from the liquid discharge holes 81 and the liquid collection holes 71 opened on the fixed disk 8. If the liquid contains solid particle impurities, after swirling in the conical pipe 7, the particle impurities enter the nested dirt collection cylinder 10 below and are discharged through the impurity discharge pipe 9; while the liquid is thrown towards the gap between the dirt collection cylinder 10 and the liquid collection and sewage discharge pipe 6, and finally flows out through the liquid discharge pipe 11.

[0047] The gas distributed at the center of the gas-liquid cyclone tube 1 moves upward. A part of it enters the gas escape tube 4 through the long slot 41 and is discharged through the gas collecting pipe 5. Another part flows along the outer wall of the gas escape tube 4 to the top of the gas-liquid cyclone tube 1. Since the gas collecting pipe 5 extends deep between the upper edges of the gas escape tube 4 and the long slot 41, when the gas collecting pipe 5 exhausts gas outward, a negative pressure zone will be formed at this junction. The negative pressure in the negative pressure zone can accelerate the discharge of the separated gas through the gas collecting pipe 5 to the outside. In addition, during the separation process, the phenomenon of gas carrying liquid is likely to occur. When the liquid-carrying gas passes through the inner walls of the gas escape tube 4 and the gas collecting pipe 5, the liquid in the gas adheres to the walls of the gas escape tube 4 and the gas collecting pipe 5 and flows vertically downward into the conical tube 7 under the action of gravity, further reducing the liquid content in the separated gas.

[0048] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A gas-liquid cyclone separation device, characterized in that, Comprising: A gas-liquid cyclone tube (1), the upper end of the gas-liquid cyclone tube (1) is closed, and a spiral guide plate (2) is arranged inside the gas-liquid cyclone tube (1) and is evenly distributed in a circumferential spiral downward direction along its inner wall. An inlet pipe (3) is arranged on the gas-liquid cyclone tube (1); A gas escape tube (4), the gas escape tube (4) is arranged inside the gas-liquid cyclone tube (1) and is arranged along its length direction. The spiral guide plate (2) is arranged between the outer wall of the gas escape tube (4) and the inner wall of the gas-liquid cyclone tube (1). A long slot (41) is arranged on the gas escape tube (4); A gas collecting pipe (5), one end of the gas collecting pipe (5) penetrates out of the upper end of the gas-liquid cyclone tube (1), and the other end is inserted into the gas escape tube (4); A liquid collecting and sewage discharging pipe (6), the liquid collecting and sewage discharging pipe (6) is connected to the lower part of the gas-liquid cyclone tube (1). A fixed disk (8) is arranged inside the upper end part of the liquid collecting and sewage discharging pipe (6). The fixed disk (8) abuts against the inner wall of the liquid collecting and sewage discharging pipe (6). The lower end of the gas escape tube (4) passes through the fixed disk (8) and is communicated with the liquid collecting and sewage discharging pipe (6). Liquid removing holes (81) are arranged on the upper end surface of the fixed disk (8), and the liquid removing holes (81) are arranged circumferentially around the lower end of the gas escape tube (4). A waste discharging pipe (9) communicated with the outside is arranged at the bottom of the liquid collecting and sewage discharging pipe (6); The outlet end of the inlet pipe (3) has a wedge-shaped block (31) to form a wedge-shaped tangential outlet. The diameter of the inlet pipe (3) gradually decreases from the inlet end of the inlet pipe (3) to the part entering the gas-liquid cyclone tube (1). The outlet direction of the wedge-shaped tangential outlet has an included angle with the axis of the inlet pipe (3); The outlet end of the inlet pipe (3) is located between the upper end edge of the gas escape tube (4) and the long slot (41); The long slot (41) is arranged circumferentially on the gas escape tube (4), and the tangential opening at the edge of the slot of the long slot (41) has the same rotation direction as the spiral guide plate (2); 2. The gas-liquid cyclone separation device according to claim 1, characterized in that, The end part of the gas collecting pipe (5) is inserted between the upper end edge of the gas escape tube (4) and the upper edge of the long slot (41); 3. The gas-liquid cyclone separation device according to claim 1, characterized in that The opening direction of the liquid removing holes (81) is the same as the rotation direction of the swirling flow field formed after the spiral guide plate (2) conducts the flow; 4. The gas-liquid cyclone separation device according to claim 3, characterized in that It also has a conical tube (7), the end with a larger opening of the conical tube (7) is connected to the fixed disk (8). The lower end of the gas escape tube (4) passes through the fixed disk (8) and is communicated with the conical tube (7). A plurality of liquid collecting holes (71) are arranged on the surface of the conical tube (7), and the opening direction of the liquid collecting holes (71) is the same as the rotation direction of the swirling flow field formed after the spiral guide plate (2) conducts the flow; 5. The gas-liquid cyclone separation device according to claim 4, characterized in that, It also has a waste collecting cylinder (10), the waste collecting cylinder (10) is arranged at the inner bottom of the liquid collecting and sewage discharging pipe (6). There is a gap between the waste collecting cylinder (10) and the liquid collecting and sewage discharging pipe (6). The end with a smaller opening of the conical tube (7) extends into the waste collecting cylinder (10), and the waste discharging pipe (9) is communicated with the waste collecting cylinder (10).

6. The gas-liquid cyclone separation device according to claim 5, wherein, It further includes a drain pipe (11), and the drain pipe (11) communicates with a gap between the dirt collection cylinder (10) and the liquid collection and sewage discharge pipe (6).

7. The gas-liquid cyclone separation device according to any one of claims 1-6, characterized in that, It further includes an exhaust pipe (12). The first end of the exhaust pipe (12) communicates with the liquid collection and sewage discharge pipe (6), the second end of the exhaust pipe (12) communicates with the gas-liquid cyclone pipe (1), and a control valve (13) is arranged on the exhaust pipe (12).

8. The gas-liquid cyclone separation device according to claim 7, characterized in that, The second end of the exhaust pipe (12) is located above the upper edge of the long slot opening (41).

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