A natural gas separation device

Abstract

The present invention relates to the technical field of natural gas treatment, and particularly relates to a natural gas separation device, which comprises a tank body, a liquid separation component and a solid separation component; an air inlet, an exhaust port and a liquid discharge port are arranged on the tank body; the liquid separation component is arranged in the tank body and divides the internal space of the tank body into a front separation cavity and a liquid recovery cavity, and a liquid return channel for communicating the front separation cavity and the liquid recovery cavity is arranged on the liquid separation component, wherein the liquid recovery cavity is communicated with the exhaust port, and the front separation cavity is communicated with the air inlet and the liquid discharge port; the solid separation component is located in the front separation cavity and is connected with the liquid separation component, and a buffer component is configured on the solid separation filter element of the solid separation component, and when the solid separation filter element is impacted in the filtering direction, the buffer component stores energy. The present invention can prevent solid impurities in natural gas from damaging the filtering structure, and at the same time has a good separation effect on natural gas.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas treatment, and more specifically, to a natural gas separation device. Background Art

[0002] Natural gas refers to a mixture of hydrocarbon and non-hydrocarbon gases naturally stored in underground formations. Its composition is mainly hydrocarbon and contains non-hydrocarbon gases. It has a wide range of applications. For example, natural gas is a clean fuel and an important chemical raw material, etc. Natural gas is stored in underground porous rock formations, including oilfield gas, gas field gas, coalbed methane, underground natural gas storage, etc. After natural gas is produced, it needs to be transported through pipelines. Since impurities in the gas will accelerate the corrosion of pipelines and equipment and reduce the transportation efficiency of pipelines, impurities in natural gas must be removed.

[0003] Chinese Patent CN203999537U discloses a natural gas purification and separation device, which includes a tank body. An air inlet and an air outlet are provided on the tank body, and it also includes a cyclone separator and a filtration system. The cyclone separator is arranged inside the tank body and in the middle of the tank body, and the air inlet is tangentially connected to the cyclone separator. The filtration system is arranged inside the tank body and above the cyclone separator. However, in the existing device, natural gas directly enters the device through the air inlet, and the solid impurities therein will damage the filtration and separation structure inside the device due to a certain impact force, thereby affecting the filtration effect. Summary of the Invention

[0004] The present invention provides a natural gas separation device, which separates solid impurities in natural gas through a solid separation component before complete filtration and separation of natural gas, and the solid separation component provides a certain buffering force for the solid impurities to relieve the impact force of the solid impurities to avoid damage to the filtration and separation structure, and finally ensures a good separation effect on natural gas.

[0005] The present invention is realized by the following technical solutions:

[0006] A natural gas separation device, comprising:

[0007] A tank body, on which an air inlet, an exhaust port and a liquid discharge port are provided;

[0008] A liquid separation component, which is arranged inside the tank body and divides the internal space of the tank body into a pre-separation chamber and a liquid recovery chamber. A liquid return channel for communicating the pre-separation chamber and the liquid recovery chamber is provided on the liquid separation component. Among them, the liquid recovery chamber is communicated with the exhaust port, and the pre-separation chamber is communicated with the air inlet and the liquid discharge port;

[0009] A solid separation component is located in the pre-separation chamber and is connected to the liquid separation component. The solid separation filter element of the solid separation component is configured with a buffer component. In the filtering direction of the solid separation filter element, when the solid separation filter element is impacted, the buffer component stores energy.

[0010] In some embodiments, the solid separation component includes a solid separation connection base and a solid separation filter element base;

[0011] The solid separation connection base is connected to the liquid separation component;

[0012] The solid separation filter element base is slidably connected to the solid separation connection base, and the buffer component is disposed between the solid separation connection base and the solid separation filter element base. The solid separation filter element is disposed on the solid separation filter element base.

[0013] In some embodiments, the liquid separation component includes a liquid separation connection seat, a liquid separation filter element base, and a liquid separation filter element;

[0014] The liquid separation connection seat is connected to the tank body, and a drainage cavity communicating the pre-separation chamber and the liquid recovery chamber is provided on the liquid separation connection seat;

[0015] The liquid separation filter element is disposed on the liquid separation filter element base;

[0016] The liquid separation filter element base is connected to the liquid separation connection seat and is located in the drainage cavity. There is a gap between the liquid separation filter element base and the liquid separation connection seat to form a drainage channel for guiding natural gas to the liquid separation filter element.

[0017] In some embodiments, the liquid separation filter element includes a support column and a flow-delay member;

[0018] The support column is disposed on the liquid separation filter element base;

[0019] The flow-delay member is disposed on the support column, and the flow-delay member has a flow-delay groove with a non-linear extension direction.

[0020] In some embodiments, the extension direction of the flow-delay groove is a spiral line.

[0021] In some embodiments, the number of the liquid separation filter elements is multiple and they are evenly distributed on the liquid separation base.

[0022] In some embodiments, it further includes a droplet capture assembly located in the liquid recovery chamber. The droplet capture assembly is connected to the tank body, and the droplet capture assembly has a rotatable capture disc to throw the captured droplets onto the chamber wall of the liquid recovery chamber.

[0023] In some embodiments, a number of droplet capture blades are arranged on the outer side of the capture disc to guide the natural gas when the capture disc rotates.

[0024] In some embodiments, a graphite heating electrode is configured on the liquid separation filter element base.

[0025] In some embodiments, a sewage discharge valve is arranged at the liquid discharge port.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] A natural gas separation device provided by the present invention can first separate the solid impurities contained in the natural gas through the setting of the solid separation assembly. At the same time, the buffer assembly in the solid separation assembly can play a certain buffering role on the impact force of the solid impurities, so that the impact of the solid impurities on the solid separation assembly is greatly reduced, which can prevent the solid impurities from damaging the solid separation assembly. After the solid impurities are filtered by the solid separation assembly, they no longer pass through the liquid separation assembly, that is, the liquid separation assembly will not come into contact with the solid impurities, and the liquid separation assembly will not be damaged; the natural gas passes through the solid separation assembly and the liquid separation assembly in sequence, and the solid impurities and moisture in the natural gas are separated specifically in sequence, and finally a good separation effect on the natural gas can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of the natural gas separation device provided by the embodiment of the present invention;

[0030] Figure 2 It is a schematic cross-sectional structural diagram of the natural gas separation device provided by the embodiment of the present invention;

[0031] Figure 3 It is a schematic structural diagram of the solid separation assembly provided by the embodiment of the present invention;

[0032] Figure 4Schematic cross-sectional structure diagram of the solid separation component provided by an embodiment of the present invention;

[0033] Figure 5 Schematic cross-sectional structure diagram of the liquid separation component provided by an embodiment of the present invention;

[0034] Figure 6 Schematic structure diagram of the droplet capture component provided by an embodiment of the present invention.

[0035] Marks in the drawings and corresponding component names:

[0036] 1 - Tank body, 11 - Liquid recovery chamber, 12 - Pre-separation chamber, 2 - Air inlet, 3 - Exhaust port, 4 - Liquid separation component, 41 - Liquid separation connection base, 411 - Liquid return channel, 412 - Drainage chamber, 42 - Drainage channel, 43 - Liquid separation filter element base, 44 - Liquid separation filter element, 5 - Solid separation component, 51 - Solid separation connection base, 511 - Guide groove, 52 - Solid separation filter element base, 521 - Guide rib, 53 - Solid filter element, 54 - Buffer component, 6 - Droplet capture component, 61 - Capture disc, 62 - Droplet capture blade, 63 - Driving motor, 64 - Transmission member, 7 - Drainage port. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention.

[0038] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that: it is not necessary to adopt these specific details to implement the present invention. In other embodiments, well-known structures, circuits, materials or methods are not specifically described in order to avoid obscuring the present invention.

[0039] Throughout the specification, the reference to "one embodiment", "embodiment", "one example" or "example" means that the specific features, structures or characteristics described in connection with that embodiment or example are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment", "embodiment", "one example" or "example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. In addition, the specific features, structures or characteristics can be combined in any appropriate combination and / or sub-combination in one or more embodiments or examples. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] In the description of the present invention, the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, 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 therefore cannot be construed as a limitation on the protection scope of the present invention.

[0041] Referring to Figures 1 to 2 , an embodiment of the present invention provides a natural gas separation device, which includes a tank body 1, a liquid separation component 4 and a solid separation component 5; an air inlet 2, an exhaust port 3 and a liquid discharge port 7 are arranged on the tank body 1; the liquid separation component 4 is arranged inside the tank body 1 and divides the internal space of the tank body 1 into a pre-separation chamber 12 and a liquid recovery chamber 11. A liquid return channel 411 for communicating the pre-separation chamber 12 and the liquid recovery chamber 11 is arranged on the liquid separation component 4. Among them, the liquid recovery chamber 11 is communicated with the exhaust port 3, and the pre-separation chamber 12 is communicated with the air inlet 2 and the liquid discharge port 7; the solid separation component 5 is located in the pre-separation chamber 12 and is connected to the liquid separation component 4. A buffer component 54 is configured on the solid separation filter element of the solid separation component 5. In the filtering direction of the solid separation filter element, when the solid separation filter element is impacted, the buffer component 54 stores energy.

[0042] In the embodiment of the present application, the overall shape of the tank body 1 is generally a hollow cylinder. The air inlet 2 is arranged at a position close to one end of the side wall of the tank body 1. The liquid discharge port 7 is arranged on one end face of the tank body 1, and the exhaust port 3 is arranged on the other end face of the tank body 1. The air inlet 2 and the exhaust port 3 can be respectively configured with an air inlet valve and an exhaust valve to control the air flow rate. The chamber wall of the tank body 1 near the liquid distribution port can be conical and the liquid discharge port 7 is located at the center of the cone, which is beneficial to the discharge of solid impurities or liquid in the pre-separation chamber 12; of course, the liquid discharge port 7 can be detachably connected to other sealed containers to collect solid impurities or liquid. The liquid discharge port 7 can also be configured with a sewage discharge valve. When natural gas is introduced through the air inlet 2, the sewage discharge valve is closed so that the natural gas flows through the solid separation component 5 and the liquid separation component 4. When the reserves of solid impurities and liquid in the pre-separation chamber 12 are too large, the introduction of natural gas is stopped, and then the sewage discharge valve is opened to discharge the solid impurities and liquid.

[0043] In the embodiments of the present application, the filtering direction of the solid separation component 5 is the flowing direction of natural gas in the solid separation component 5, and the filtering direction of the solid separation component 5 does not have to be consistent with the extending direction of the air inlet 2. The solid impurities themselves move along with the natural gas, as long as the natural gas can flow through the solid separation component 5. When the solid impurities impact the solid separation filter element, the buffer component 54 provides a buffering force for the solid separation filter element, thereby reducing the impact of the solid impurities on the solid separation filter element, and further realizing the protection of the solid separation filter element.

[0044] During operation, natural gas first enters the pre-separation chamber 12 through the air inlet 2, and then the solid impurities are separated through the solid separation filter element. The natural gas from which the solid impurities have been separated enters the liquid separation component 4 to realize the separation of moisture. The separated moisture can condense into droplets. The natural gas carrying some droplets of the separated liquid enters the liquid recovery chamber 11, and the droplets fall downward under the action of gravity, while the natural gas is discharged through the exhaust port 3.

[0045] In some embodiments, refer to Figures 2 to 4 , the solid separation component 5 may include a solid separation connection base 51 and a solid separation filter element base 52; the solid separation connection base 51 is connected to the liquid separation component 4; the solid separation filter element base 52 is slidably connected to the solid separation connection base 51, and the buffer component 54 is arranged between the solid separation connection base 51 and the solid separation filter element base 52, and the solid separation filter element is arranged on the solid separation filter element base 52.

[0046] Specifically, the solid separation connection base 51 can be set in a cylindrical shape. One axial end of the solid separation connection base 51 is connected to the liquid separation component 4 through a plurality of connecting pieces. The solid separation filter element base 52 can also be set in a cylindrical shape and coaxially sleeved in the solid separation connection base 51. A plurality of guiding convex strips 521 parallel to the axis of the solid separation filter element base 52 can be arranged on the outer side wall of the solid separation filter element base 52. A guiding groove 511 corresponding to the guiding convex strips 521 in position and shape is arranged on the inner wall of the solid separation connection base 51 to realize the sliding connection between the solid separation connection base 51 and the solid separation filter element base 52. The buffer component 54 can specifically be set as a spring. The spring can be arranged in the guiding groove 511, and the axis of the spring is parallel to the extending direction of the guiding groove 511. One end of the spring is fixedly connected to the groove wall of the guiding groove 511, and the other end is fixedly connected to the guiding convex strip 521. In this way, when the solid separation filter element base 52 slides relative to the solid separation connection base 51, the spring can provide a force in the opposite direction for the solid separation filter element base 52. For example, when the solid separation filter element is impacted, the solid separation filter element drives the solid separation filter element base 52 to slide relative to the solid separation connection base 51 to compress the spring. At this time, the spring stores energy and relieves the impact of solid impurities, thereby protecting the solid separation filter element. Of course, the spring can also be replaced with elastic devices such as hydraulic telescopic rods and spring telescopic rods.

[0047] Furthermore, an elastic sliding connection can be realized between the solid separation connection base 51 and the liquid separation component 4 through an elastic device. For example, in specific implementation, a plurality of sliding rods can be vertically arranged at the end of the solid separation connection base 51, a plurality of sliding holes adapted to the sliding rods are arranged on the liquid separation component 4, a limiting structure is arranged between the sliding rods and the sliding holes, and then a spring is sleeved on the sliding rods. When the impact of solid impurities on the solid separation filter element is too large, further buffering can be realized through the elastic device between the solid separation connection base 51 and the liquid separation component 4, thereby further reducing the impact of solid impurities on the solid separation filter element and protecting the solid separation filter element.

[0048] In some embodiments, reference can be made to Figure 2 and Figure 5 , where Figure 2 and Figure 5The arrow in it indicates the flow direction of a part of the natural gas. The liquid separation component 4 includes a liquid separation connection base 41, a liquid separation filter element base 43, and a liquid separation filter element 44. The liquid separation connection base 41 is connected to the tank body 1, and a drainage cavity 412 communicating the pre-separation cavity 12 and the liquid recovery cavity 11 is provided on the liquid separation connection base 41. The liquid separation filter element 44 is arranged on the liquid separation filter element base 43. The liquid separation filter element base 43 is connected to the liquid separation connection base 41 and is located in the drainage cavity 412. There is a gap between the liquid separation filter element base 43 and the liquid separation connection base 41 to form a drainage channel 42 for guiding the natural gas to the liquid separation filter element 44.

[0049] In the embodiment of the present application, the liquid separation connection base 41 can be set as a cylinder. The liquid separation connection base 41 is coaxially arranged with the tank body 1, and the outer wall of the liquid separation connection base 41 is in close contact with the inner wall of the tank body 1 everywhere to ensure the sealing performance. A plurality of liquid return channels 411 whose axes are parallel to the axis of the liquid separation base can be arranged along the circumferential direction on the liquid separation base. The liquid return channels 411 communicate the liquid recovery cavity 11 and the pre-separation cavity 12. The drainage cavity 412 of the liquid separation connection base 41 can be set as a stepped hole. The large-diameter hole in the stepped hole is adjacent to the pre-filtering chamber, and the small-diameter hole in the stepped hole is adjacent to the liquid recovery cavity 11. The liquid separation filter element 44 is arranged in the small-diameter hole, and the liquid separation filter element base 43 is arranged in the large-diameter hole, that is, a part of the structure of the liquid separation filter element 44 protrudes from the small-diameter hole and is located in the large-diameter hole. The liquid separation filter element base 43 can be set as a disc shape with a diameter equal to the diameter of the small-diameter hole. In this way, a gap can be formed between the liquid separation filter element base 43 and the inner wall of the liquid separation connection base. At the same time, since the diameter of the liquid separation filter element base 43 is equal to the diameter of the small-diameter hole, the liquid separation filter element base 43 can block the vertical upward flow of the natural gas, that is, the natural gas needs to pass through the gap between the liquid separation filter element base 43 and the liquid separation connection base and then enter the liquid separation filter element 44. In this way, the natural gas can achieve a certain deceleration effect after being blocked by the liquid separation filter element base 43, so that the flow rate of the natural gas is reduced. In this way, the natural gas can have a longer residence time in the liquid separation filter element 44, thereby improving the separation effect of moisture and making the moisture in the natural gas be separated more thoroughly.

[0050] Further, in order to ensure that the natural gas in the pre-separation cavity 12 only enters the liquid recovery cavity 11 through the liquid separation component 4, a one-way valve can be configured in the liquid return channel 411.

[0051] In some embodiments, the liquid separation filter element 44 includes a support column and a delay drainage member. The support column is arranged on the liquid separation filter element base 43. The delay drainage member is arranged on the support column, and the delay drainage member has a delay drainage groove with a non-linear extension direction.

[0052] In the embodiments of the present application, the support column can be detachably connected to the separation filter element base for easy cleaning. The support column can be set as a cylindrical member, and the axis of the support column and the liquid separation filter element base 43 can be arranged parallel to each other, that is, the support column is perpendicularly connected to the liquid separation filter element base 43. The setting method and position of the delay drainage member on the support column can be not limited, as long as it can ensure that natural gas enters the delay drainage groove. Of course, it is also necessary to ensure that the overall extension direction of the delay drainage groove is upward, that is, the natural gas can achieve a height increase after being guided by the delay drainage groove. For example, in specific implementation, the extension direction of the delay drainage groove can be set as a spiral line, and the axis of the spiral line can coincide with the axis of the support column. After the natural gas enters the delay drainage groove, it ascends along the extension direction of the delay drainage groove. At the same climbing height, the spiral delay drainage groove can extend the flow path of the natural gas as much as possible, and the natural gas can have more contact time with the groove wall of the delay drainage groove. In this way, the moisture in the natural gas can condense more on the inner wall of the delay drainage groove, promoting the separation of moisture in the natural gas. After the moisture in the natural gas condenses into droplets on the groove wall of the delay drainage groove, it can leave the delay drainage groove under the drive of the natural gas and enter the liquid recovery chamber 11. After the droplets enter the liquid recovery chamber 11, most of them fall by their own gravity into the liquid return channel 411 and do not follow the natural gas to be discharged from the exhaust port 3.

[0053] It should be noted that the natural gas does not rise vertically under the guidance of the delay drainage groove. Therefore, most of the droplets do not fall vertically freely, but scatter around the liquid separation assembly 4 in a parabolic path.

[0054] In some embodiments, the number of the liquid separation filter elements 44 is multiple and they are evenly distributed on the liquid separation base. Since the delay drainage groove is a groove body and not a closed channel, part of the natural gas may break away from the delay drainage groove after entering the delay drainage groove. At this time, the separated natural gas can enter the delay drainage grooves of other liquid separation filter elements 44 to continue to separate the moisture in the natural gas, so as to achieve the effect of full separation of the moisture in the natural gas.

[0055] In some embodiments, reference can be made to Figure 2 and Figure 6 , and it further includes a droplet capture assembly 6 located in the liquid recovery chamber 11. The droplet capture assembly 6 is connected to the tank body 1, and the droplet capture assembly 6 has a rotatable capture disk 61 to throw the captured droplets onto the chamber wall of the liquid recovery chamber 11.

[0056] In the embodiments of the present application, through the arrangement of the droplet capture assembly 6, a small number of droplets can be prevented from vertically falling back into the liquid separation filter element 44, thus affecting the natural gas moisture separation effect. Of course, inevitably, after the droplets hit the capture disk 61, they will also vertically fall due to rebound. At this time, a liquid accumulation disk can be arranged at the top of the support column, and a liquid accumulation cavity can be arranged on the liquid accumulation disk to collect the rebounded droplets and prevent them from entering the delayed drainage groove. During specific implementation, the capture disk 61 is coaxially arranged with the liquid separation filter element base 43. The capture disk 61 can be set as a hollow structure to reduce its own weight. A driving motor 63 is arranged on one side surface of the capture disk 61. The driving motor 63 can be connected to the liquid separation connection base through a connection bracket. A transmission member 64 is arranged on the other side surface of the capture disk 61. The driving motor 63 drives the capture disk 61 to rotate through the transmission member 64.

[0057] In some embodiments, a plurality of droplet capture vanes 62 are arranged on the outer side of the capture disk 61 to guide the natural gas when the capture disk 61 rotates. The droplet capture vanes 62 can increase the capture range of the droplet capture assembly 6. The droplet capture vanes 62 are arranged at intervals in a circumferential uniform distribution on the outer side of the capture disk 61. In this way, the droplet capture vanes 62 can slap the droplets onto the cavity wall of the liquid recovery cavity 11 by means of slapping without relying on centrifugal force. At the same time, an included angle can be formed between the leaf surface of the droplet capture vanes 62 and the disk surface of the capture disk 61. In this way, a negative pressure can be formed when the capture disk 61 drives the droplet capture vanes 62 to rotate, accelerating the natural gas to leave the liquid recovery cavity 11 and improving the overall natural gas treatment efficiency.

[0058] In some embodiments, a graphite heating electrode is configured on the liquid separation filter element base 43. With such an arrangement, the liquid on the liquid separation filter element base 43 can be heated, which can prevent a large amount of liquid from flowing back and causing a certain blockage to the passage of natural gas, ensuring the normal flow of natural gas, and thus improving the overall natural gas treatment efficiency.

[0059] The above-mentioned specific embodiments further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A natural gas separation device, characterized in that, Comprising: A tank body (1) provided with an air inlet (2), an air outlet (3) and a liquid discharge port (7) thereon. A liquid separation assembly (4) disposed within the tank body (1) and dividing the interior space of the tank body (1) into a pre-separation chamber (12) and a liquid recovery chamber (11). A liquid return channel (411) for communicating the pre-separation chamber (12) and the liquid recovery chamber (11) is provided on the liquid separation assembly (4). Wherein, the liquid recovery chamber (11) is communicated with the air outlet (3), and the pre-separation chamber (12) is communicated with the air inlet (2) and the liquid discharge port (7). A solid separation assembly (5) located within the pre-separation chamber (12) and connected to the liquid separation assembly (4). The solid separation filter element of the solid separation assembly (5) is configured with a buffer assembly (54). In the filtering direction of the solid separation filter element, when the solid separation filter element is impacted, the buffer assembly (54) stores energy. Wherein, the solid separation assembly (5) includes a solid separation connection base (51) and a solid separation filter element base (52); the solid separation connection base (51) is connected to the liquid separation assembly (4); the solid separation filter element base (52) is slidably connected to the solid separation connection base (51) and the buffer assembly (54) is disposed between the solid separation connection base (51) and the solid separation filter element base (52), and the solid separation filter element is disposed on the solid separation filter element base (52). A droplet capture assembly (6) located within the liquid recovery chamber (11). The droplet capture assembly (6) is connected to the tank body (1). The droplet capture assembly (6) has a rotatable capture disc (61) to throw the captured droplets onto the chamber wall of the liquid recovery chamber (11). A plurality of droplet capture vanes (62) are provided on the outer side of the capture disc (61) to guide the natural gas when the capture disc (61) rotates. Wherein, an included angle is formed between the leaf surface of the droplet capture vane (62) and the disc surface of the capture disc (61). Wherein, the liquid separation assembly (4) includes a liquid separation connection seat (41), a liquid separation filter element base (43) and a liquid separation filter element (44). The liquid separation connection seat (41) is connected to the tank body (1), and a drainage chamber (412) for communicating the pre-separation chamber (12) and the liquid recovery chamber (11) is provided on the liquid separation connection seat (41). The liquid separation filter element (44) is disposed on the liquid separation filter element base (43). The liquid separation filter element base (43) is connected to the liquid separation connection seat (41) and is located within the drainage chamber (412). A gap is formed between the liquid separation filter element base (43) and the liquid separation connection seat (41) to form a drainage channel (42) for guiding the natural gas to the liquid separation filter element (44).

2. The natural gas separation device according to claim 1, characterized in that The liquid separation filter element (44) includes a support column and a flow delay member. The support column is arranged on the liquid separation filter element base (43); The flow delay member is arranged on the support column and the flow delay member has a flow delay groove with a non-linear extension direction.

3. The natural gas separation device according to claim 2, characterized in that, The extension direction of the flow delay groove is a spiral line.

4. The natural gas separation device according to claim 2, characterized in that, The number of the liquid separation filter elements (44) is multiple and they are evenly distributed on the liquid separation filter element base (43).

5. The natural gas separation device according to claim 2, wherein, The liquid separation filter element base (43) is provided with a graphite heating electrode.

6. The natural gas separation device according to claim 1, characterized in that, A sewage discharge valve is arranged at the liquid discharge port (7).

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