Test pretreatment device for rare gas isotope in oil-gas mixture

Abstract

The invention relates to a pretreatment device, and discloses a pretreatment device for testing rare gas isotopes in an oil-gas mixture. The device comprises a first separation assembly (2) and a second separation assembly, the first separation assembly (2) and the second separation assembly are connected and communicated through a gas path, the first separation assembly (2) comprises a filtering structure (21) and a cyclone separator (22), a filtering channel (21a) and a drainage channel (21b) are formed in the filtering structure (21), and the cyclone separator (22) is communicated with the filtering channel (21a). Fluid filtered by the filtering channel (21a) is suitable for entering the cyclone separator (22) for cyclone separation, gas obtained through cyclone separation enters the second separation assembly through the drainage channel (21b), and water vapor, high-carbon light hydrocarbon components and media are separated out through the second separation assembly. The device can effectively separate an oil-gas mixture, and the subsequent detection precision is improved.

Description

Technical Field

[0001] This invention relates to a pretreatment apparatus, specifically, to a pretreatment apparatus for testing rare gas isotopes in an oil-gas mixture. Background Technology

[0002] Currently, rare gas isotope testing is mainly applicable to natural gas samples with very high dryness coefficients. However, testing rare gas isotopes in gas-liquid two-phase oil-gas mixtures faces numerous challenges, especially the effective separation of rare gases from natural oil-gas samples. Besides natural gas, natural oil-gas samples often contain components such as water vapor, liquid hydrocarbons, and high-carbon light hydrocarbons. Liquid hydrocarbons and high-carbon light hydrocarbons can clog testing equipment pipelines and severely contaminate the testing system, making it impossible to accurately and effectively determine rare gas isotopes in gas-liquid two-phase oil-gas mixtures. However, currently, there is no effective pretreatment and purification device for rare gas isotopes in oil-gas mixtures that is adaptable to various operating environments under laboratory conditions. Although industrial-grade purification equipment can effectively separate gas and liquid components in oil-gas mixtures, this process is not conducted under high vacuum conditions. Because air contains a certain amount of rare gas components, such as argon (Ar) at 0.934%, which is significantly higher than the Ar content in natural oil and gas samples, the mixing of air in industrial-grade purification equipment and processes will contaminate natural oil and gas samples. This will affect the industrial-grade purification equipment and processes, making it impossible to effectively separate rare gases from the gas-liquid two-phase oil and gas mixture. Summary of the Invention

[0003] The purpose of this invention is to provide a pretreatment device for rare gas isotope testing in oil-gas mixtures. This device can effectively separate oil-gas mixtures and improve the accuracy of subsequent detection.

[0004] To achieve the above objectives, the present invention provides a pretreatment device for rare gas isotope testing in an oil-gas mixture, comprising a first separation component and a second separation component. The first separation component and the second separation component are connected and have a gas path in communication. The first separation component includes a filter structure and a cyclone separator. The filter structure has a filter channel and a flow channel. The fluid filtered through the filter channel is suitable for entering the cyclone separator for cyclone separation. The gas obtained by the cyclone separation is suitable for entering the second separation component through the flow channel, and water, high-carbon light hydrocarbon components, and media are separated by the second separation component.

[0005] Optionally, the filtration structure includes a filter cartridge and a diversion pipe and a liquid adsorption plate disposed within the filter cartridge. The diversion pipe is adapted to divide the filter cartridge into a filtration channel and a drainage channel, and the liquid adsorption plate is disposed within the filtration channel.

[0006] Optionally, the drainage channel is a frustum-shaped channel that gradually increases in size from the air inlet end to the air outlet end.

[0007] Optionally, the cross-section of the liquid adsorption plate is rectangular or droplet-shaped.

[0008] Optionally, one end of the liquid adsorption plate is connected to the diversion pipe, and the other end is inclined forward along the fluid flow direction in the filter channel.

[0009] Optionally, the included angle between the axis of the filter channel and the axis of the filter cartridge is 30-60°.

[0010] Optionally, multiple liquid adsorption plates are provided, and the multiple liquid adsorption plates are connected to the outside of the diversion pipe and arranged in a spiral shape around the axis of the filter cylinder.

[0011] Optionally, the second separation component includes a condenser separator.

[0012] Optionally, the condenser separator includes a separation cylinder, a heat exchanger disposed inside the separation cylinder, and a heat exchange structure connected to the heat exchanger, wherein the heat exchange structure is adapted to exchange heat with the fluid passing through the heat exchanger.

[0013] Optionally, the heat exchanger has an isosceles trapezoidal axial section, and the cross-section of the heat exchanger is configured to gradually decrease from front to back along the gas flow direction.

[0014] Optionally, the distance between the top of the heat exchanger and the inner upper end face of the separation cylinder is not less than 30% of the internal height of the separation cylinder, and the distance between the bottom of the heat exchanger and the inner lower end face of the separation cylinder is not less than 30% of the internal height of the separation cylinder.

[0015] Optionally, the second separation component further includes a U-shaped separation tube and a water absorption filter structure and an oil absorption filter structure disposed inside the U-shaped separation tube, wherein the water absorption filter structure and the oil absorption filter structure are arranged along the gas flow direction.

[0016] Optionally, the second separation assembly further includes a first heat exchange tube sleeved on the cyclone separator and a second heat exchange tube sleeved on the U-shaped separation tube, wherein the first heat exchange tube and the second heat exchange tube are adapted to exchange heat with the fluid passing through the interior of the heat exchanger.

[0017] Optionally, the U-shaped separator includes a U-shaped bottom pipe, a first expansion pipe connected to the air inlet end of the U-shaped bottom pipe, and a second expansion pipe connected to the air outlet end of the U-shaped bottom pipe. The water absorption filter structure is disposed in the first expansion pipe, and the oil absorption filter structure is disposed in the second expansion pipe.

[0018] Optionally, the water-absorbing filter structure includes a water-absorbing skeleton structure, a water-absorbing flexible filter structure, and a water-absorbing layer. The water-absorbing skeleton structure includes a water-absorbing transverse support structure and a water-absorbing longitudinal support structure. The water-absorbing flexible filter structure is wrapped around both the water-absorbing transverse support structure and the water-absorbing longitudinal support structure. The water-absorbing layer fills the spaces between the water-absorbing skeleton structures.

[0019] Optionally, the water-absorbing lateral support structure includes at least two first bearing members, and the water-absorbing longitudinal support structure includes at least two second bearing members and a first bearing spring disposed between the two second bearing members.

[0020] Optionally, the device further includes an oscillation structure disposed between the two straight sections of the U-shaped separating tube, the oscillation structure being connected to the two straight sections via an elastic structure.

[0021] Optionally, the device further includes a support frame, in which the first separation component, the condenser separator, and the U-shaped separation tube are disposed.

[0022] Optionally, the device may further include a sample injection needle connected to the outlet of the U-shaped separator.

[0023] Through the above technical solution, the rare gas isotope testing pretreatment device for oil-gas mixtures provided by this invention connects the first separation component and the second separation component sequentially and connects them via a gas path. The first separation component is configured to include a filter structure and a cyclone separator. The oil-gas mixture is first filtered through the filter channel in the filter structure, then enters the cyclone separator for cyclone separation, and is then introduced into the second separation component through a guide channel for further separation. The first separation component separates liquid hydrocarbons and liquid water, while the second separation component separates water vapor, high-carbon light hydrocarbon components, and the medium. This achieves effective separation of water, liquid hydrocarbons, and high-carbon light hydrocarbon components in different states from natural gas in the oil-gas mixture, greatly improving the testing accuracy of rare gas isotopes in natural gas. Moreover, this device has a simple structure, high degree of equipment integration and modularity, flexible and convenient operation, and good adaptability to the operating environment.

[0024] Other advantages of the present invention and the technical effects of preferred embodiments will be further described in the following detailed description. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1This is a schematic diagram of a specific embodiment of the rare gas isotope testing pretreatment device in an oil-gas mixture according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of a specific embodiment of the first separation component in this invention.

[0028] Figure 3 This is a schematic diagram of a specific embodiment of the condenser separator in this invention.

[0029] Figure 4 This is a schematic diagram of a specific embodiment of the U-shaped separation tube in this invention.

[0030] Figure 5 This is a schematic diagram of a specific embodiment of the water absorption and filtration structure in this invention.

[0031] Figure 6 This is a schematic diagram of a specific embodiment of the oil absorption and filtration structure in this invention.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Support frame 2. First separation assembly

[0034] 3. Condenser Separator 4. U-shaped Separator Tube

[0035] 5. Oscillating structure 6. Elastic structure

[0036] 7. Booster pump 8. Injection needle

[0037] 9. Drive circuit 10. Vacuum pump

[0038] 21 Filter structure 22 Hydrocyclone separator

[0039] 21a Filtering channel 21b Drainage channel

[0040] 211 Filter cartridge 212 Diverter tube

[0041] 213 Liquid Adsorption Plate

[0042] 31 Separator 32 Heat Exchanger

[0043] 33 Heat exchange structure 34 First induced draft fan

[0044] 35 First multi-way valve 36 First heat exchanger tube

[0045] 37 Second heat exchanger tube 38 Second exhaust fan

[0046] 39 Second multi-way valve

[0047] 41 U-shaped bottom tube 42 Water absorption and filtration structure

[0048] 43 Oil suction filter structure 44 First sealing end cap

[0049] 45 First expansion tube 46 Second sealing end cap

[0050] 47 Second expansion pipe

[0051] 421 First load-bearing component 422 First load-bearing spring

[0052] 423 Water-absorbing flexible filter structure; 424 Water-absorbing layer

[0053] 425 Second bearing component

[0054] 431 Third load-bearing component; 432 Second load-bearing spring.

[0055] 433 Oil-absorbing flexible filter structure; 434 Oil-absorbing layer

[0056] 435 Fourth load-bearing component Detailed Implementation

[0057] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to abutment; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0060] In one basic embodiment of the present invention, see [link to original text]. Figure 1 and Figure 2The rare gas isotope testing pretreatment device in the oil-gas mixture includes a first separation component 2 and a second separation component. The first separation component 2 and the second separation component are connected and have a gas path connection. The first separation component 2 includes a filter structure 21 and a cyclone separator 22. The filter structure 21 has a filter channel 21a and a flow channel 21b. The fluid filtered by the filter channel 21a is suitable to enter the cyclone separator 22 for cyclone separation. The gas obtained by cyclone separation is suitable to enter the second separation component through the flow channel 21b, and the second separation component separates water vapor, high carbon light hydrocarbon components and media.

[0061] According to the present invention, the filter structure 21 can be any structure capable of adsorbing liquid and forming filter channels 21a and drainage channels 21b inside, and the cyclone separator 22 can be any structure capable of cyclone separation.

[0062] When the pretreatment device provided in the above basic embodiment of the present invention is working, the oil-gas mixture enters the filter channel 21a of the filter structure 21 from the feed inlet for the first gas-liquid separation (filtration). The gas obtained after the first gas-liquid separation enters the cyclone separator 22 for the second gas-liquid separation (cyclone separation). The liquid obtained from the second gas-liquid separation is discharged from the bottom of the cyclone separator 22. The gas obtained from the second gas-liquid separation continues to enter the second separation component through the guide channel 21b of the filter structure 21 for gas-liquid separation. Through this gas-liquid separation, water vapor, high-carbon light hydrocarbon components and media in the mixed gas are separated, and then rare gas isotope testing is performed on the oil-gas mixture.

[0063] The pretreatment device provided by the above-described basic embodiment of the present invention connects the first separation component 2 and the second separation component and connects them via a gas path. The first separation component 2 is configured to include a filter structure 21 and a cyclone separator 22. The oil-gas mixture is first filtered through the filter channel 21a in the filter structure 21, and then enters the cyclone separator 22 for cyclone separation. It is then introduced into the second separation component through the guide channel 21b for further separation. The first separation component 2 separates liquid hydrocarbons and liquid water, while the second separation component separates water vapor, high-carbon light hydrocarbon components, and the medium. This achieves effective separation of water, liquid hydrocarbons, and high-carbon light hydrocarbon components in different states from natural gas in the oil-gas mixture, greatly improving the accuracy of rare gas isotope testing in natural gas. Moreover, the above configuration can ensure the cyclone effect without affecting the discharge of both gas and liquid fluids from the cyclone separator 22. The structure is simple, the equipment is highly integrated and modular, the operation is flexible and convenient, and it has good adaptability to the operating environment.

[0064] In one specific embodiment of the present invention, such as Figure 2As shown, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a drainage channel 21b, and the liquid adsorption plate 213 is disposed within the filter channel 21a. The diversion pipe 212 divides the interior of the filter cylinder 211 into the filter channel 21a and the drainage channel 21b, ensuring the swirling effect without affecting the discharge of both gas and liquid fluids from the cyclone separator 22, resulting in a simple structure. The liquid adsorption plate 213 can be a plate formed from any material capable of adsorbing liquid.

[0065] As a specific embodiment of the present invention, such as Figure 2 As shown, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a flow channel 21b. The liquid adsorption plate 213 is disposed within the filter channel 21a. The filter cylinder 211, the diversion pipe 212 and the cyclone separator 22 are coaxially arranged. The gas filtered by the liquid adsorption plate 213 can enter the cyclone separator 22 from the area outside the central axis of the cyclone separator 22. The above arrangement can improve the cyclone effect of the cyclone separator 22, thereby improving the accuracy of subsequent testing of rare gas isotopes in the oil-gas mixture.

[0066] In one specific embodiment of the present invention, such as Figure 2 As shown, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a drainage channel 21b. The liquid adsorption plate 213 is disposed within the filter channel 21a. The drainage channel 21b is a frustum-shaped channel that gradually increases in size from the inlet end to the outlet end. Specifically, with the outlet direction of the drainage channel 21b as the top, the diversion pipe 212 is a frustum-shaped tube that is smaller at the top and larger at the bottom. The upper end of the diversion pipe 212 is sealed to the upper bottom surface of the filter cylinder 211, and the lower end of the diversion pipe 212 is sealed to the lower bottom surface of the filter cylinder 211. By configuring the diverter 212 as a frustum-shaped tube with a smaller top and a larger bottom, the gas entering the filter channel 21a forms a swirling flow, increasing its contact area with the liquid adsorption plate 213 and further improving the gas-liquid separation effect. This, in turn, improves the accuracy of subsequent rare gas isotope testing in the oil-gas mixture. In a specific embodiment of the invention, the angle between the axes of the filter channel 21a and the filter cylinder 211 is 30-60°. Research has found that setting the angle between the axes of the filter channel 21a and the filter cylinder 211 to 30-60° maximizes the separation effect, thereby improving the accuracy of subsequent rare gas isotope testing in the oil-gas mixture.

[0067] In one specific embodiment of the present invention, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a drainage channel 21b. The liquid adsorption plate 213 is disposed within the filter channel 21a, and the cross-section of the liquid adsorption plate 213 is rectangular or teardrop-shaped. The cross-section refers to the section perpendicular to the paper surface and perpendicular to the axial direction a of the filter cylinder 211. Studies have found that using a liquid adsorption plate 213 with the above-mentioned cross-sectional shape has a higher adsorption effect, thereby improving the accuracy of subsequent testing of rare gas isotopes in oil-gas mixtures.

[0068] In one specific embodiment of the present invention, such as Figure 2 As shown, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a flow channel 21b. The liquid adsorption plate 213 is disposed within the filter channel 21a. One end of the liquid adsorption plate 213 is connected to the outer periphery of the diversion pipe 212, and the other end is inclined forward along the fluid flow direction a within the filter channel 21a. With the air outlet direction in the filter channel 21a as downward, the liquid adsorption plate 213 is connected to the outer periphery of the diversion pipe 212 and is inclined downward in its extension direction from the connection end with the diversion pipe 212, which can further increase its contact area with the fluid, thereby improving its separation effect.

[0069] In one specific embodiment of the present invention, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a drainage channel 21b. The liquid adsorption plate 213 is disposed within the filter channel 21a, and multiple liquid adsorption plates 213 are disposed thereon. The multiple liquid adsorption plates 213 are connected to the outer periphery of the diversion pipe 212 and arranged in a spiral shape around the axis of the filter cylinder 211. The above arrangement can further increase the effective contact area between the liquid adsorption plate 213 and the gas, thereby further improving its adsorption effect.

[0070] In one specific embodiment of the present invention, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a flow channel 21b. The liquid adsorption plate 213 is disposed within the filter channel 21a. The filter cylinder 211 is configured as a frustum-shaped structure, wider at the top and narrower at the bottom, wherein the gas outlet direction in the filter channel 21a is downward. This allows the gas in the filter channel 21a to form a vortex, improving its separation effect and thereby enhancing the accuracy of subsequent rare gas isotope testing in the oil-gas mixture.

[0071] In one specific embodiment of the present invention, the filter structure 21 includes a filter cylinder 211, a diversion pipe 212 and a liquid adsorption plate 213 disposed within the filter cylinder 211. The diversion pipe 212 is adapted to divide the filter cylinder 211 into a filter channel 21a and a drainage channel 21b. The liquid adsorption plate 213 is disposed within the filter channel 21a, and the width of the filter channel 21a is not less than 5 mm. This ensures the separation effect and thus guarantees the accuracy of subsequent testing of rare gas isotopes in the oil-gas mixture.

[0072] In one specific embodiment of the present invention, the second separation component includes a condenser separator 3. By configuring the second separation component to include the condenser separator 3, water vapor and high-carbon light hydrocarbon components can be effectively separated in the third separation, further improving the separation effect and thereby improving the accuracy of subsequent rare gas isotope testing in the oil-gas mixture.

[0073] The condenser separator 3 can be structured to perform condensation separation. In one specific embodiment of the invention, such as... Figure 3 As shown, the condenser separator 3 includes a separation cylinder 31, a heat exchanger 32 disposed inside the separation cylinder 31, and a heat exchange structure 33 connected to the heat exchanger 32. The heat exchange structure 33 is adapted to exchange heat with the fluid passing through the heat exchanger 32. The condenser separator 3 provided above is not only simple in structure, but also capable of exchanging heat with the fluid entering and exiting the heat exchanger 32, ensuring the normal operation of the heat exchanger 32, improving the condensation and separation effect of the condenser separator 3, thereby improving the accuracy of subsequent rare gas isotope testing in the oil-gas mixture.

[0074] In one specific embodiment of the present invention, such as Figure 3 As shown, the condenser separator 3 includes a separation cylinder 31, a heat exchanger 32 disposed inside the separation cylinder 31, and a heat exchange structure 33 connected to the heat exchanger 32. The heat exchange structure 33 is adapted to exchange heat with the fluid passing through the heat exchanger 32. The axial section of the heat exchanger 32 is an isosceles trapezoid, and the cross-section of the heat exchanger 32 is set to gradually decrease from front to back along the gas flow direction. The above configuration enables the gas entering the separation cylinder 31 to form a vortex, improving its heat exchange effect, thereby improving its separation effect and increasing the accuracy of subsequent rare gas isotope testing in the oil-gas mixture.

[0075] According to the present invention, the axial section refers to the vertical plane passing through the axis of the separation cylinder 31. Exemplarily, it can be a section passing through the axis of the separation cylinder 31 and perpendicular to the paper surface, or it can be a section passing through the axis of the separation cylinder 31 and parallel to or coincident with the paper surface. The heat exchange structure 33 can be an air vortex tube.

[0076] The heat exchanger 32 and the heat exchange structure 33 can be connected via a first multi-way valve 35. Specifically, the inlet and outlet of the heat exchanger 32 can be connected via the first multi-way valve 35, as can the inlet and outlet of the air vortex tube. Gas exiting the heat exchanger 32 enters the heat exchange structure 33 through the first multi-way valve 35, and then exits from the outlet of the heat exchange structure 33 before being injected back into the heat exchanger 32 through the first multi-way valve 35, thus achieving heat exchange with the gas passing through the heat exchanger 32. A first induced draft fan 34 is provided between the inlet of the heat exchanger 32 and the first multi-way valve 35; a second induced draft fan 38 is provided at the inlet of the heat exchange structure 33. The second induced draft fan 38 is connected to the inlet of the heat exchange structure 33 via the first multi-way valve 35.

[0077] The separating cylinder 31 can be of any feasible shape. In one specific embodiment of the invention, such as Figure 3 As shown, the interior of the separator 31 is formed into a spindle-shaped cavity structure. Preferably, the liquid inlet and the exhaust outlet of the separator 31 are coaxially arranged with the separator 31, which can improve the heat exchange effect, thereby improving the separation effect and improving the accuracy of subsequent testing of rare gas isotopes in the oil-gas mixture.

[0078] In one specific embodiment of the present invention, such as Figure 3 As shown, the separation cylinder 31 and the heat exchanger 32 are coaxially arranged, which can improve the heat exchange effect, thereby improving the separation effect and improving the accuracy of subsequent testing of rare gas isotopes in the oil-gas mixture.

[0079] In one specific embodiment of the present invention, the condenser separator 3 includes a separation cylinder 31, a heat exchanger 32 disposed inside the separation cylinder 31, and a heat exchange structure 33 connected to the heat exchanger 32. The heat exchange structure 33 is adapted to exchange heat with the fluid passing through the heat exchanger 32. The distance between the top of the heat exchanger 32 and the upper inner surface of the separation cylinder 31 is not less than 30% of the internal height of the separation cylinder 31, and the distance between the bottom of the heat exchanger 32 and the lower inner surface of the separation cylinder 31 is not less than 30% of the internal height of the separation cylinder 31. This ensures both effective heat exchange and smooth flow of gas and liquid within the separation cylinder 31.

[0080] In one specific embodiment of the present invention, such as Figure 4 As shown, the second separation assembly also includes a U-shaped separation tube 4 and a water-absorbing filter structure 42 and an oil-absorbing filter structure 43 disposed inside the U-shaped separation tube. The water-absorbing filter structure 42 and the oil-absorbing filter structure 43 are arranged along the gas flow direction. The above arrangement can fully absorb water and oily substances in the mixed gas, remove aqueous and oily media, and improve the accuracy of subsequent rare gas isotope testing in the oil-gas mixture.

[0081] As a specific embodiment of the present invention, such as Figure 4As shown, the second separation component also includes a U-shaped separation tube 4 and a water absorption filter structure 42 and an oil absorption filter structure 43 disposed inside the U-shaped separation tube. The U-shaped separation tube includes a U-shaped bottom tube 41, a first expansion tube 45 connected to the air inlet end of the U-shaped bottom tube 41, and a second expansion tube 47 connected to the air outlet end of the U-shaped bottom tube 41. The water absorption filter structure 42 is disposed inside the first expansion tube 45, and the oil absorption filter structure 43 is disposed inside the second expansion tube 47.

[0082] The water-absorbing filter structure 42 can be any filter structure capable of achieving water absorption. In one specific embodiment of the present invention, such as... Figure 4 and Figure 5 As shown, the second separation component also includes a U-shaped separation tube 4 and a water-absorbing filter structure 42 and an oil-absorbing filter structure 43 disposed inside the U-shaped separation tube 4. The U-shaped separation tube 4 includes a U-shaped bottom tube 41, a first expansion tube 45 connected to the air inlet end of the U-shaped bottom tube 41, and a second expansion tube 47 connected to the air outlet end of the U-shaped bottom tube 41. The water-absorbing filter structure 42 is disposed inside the first expansion tube 45, and the oil-absorbing filter structure 43 is disposed inside the second expansion tube 47. The water-absorbing filter structure 42 includes a water-absorbing skeleton structure, a water-absorbing flexible filter structure 423, and a water-absorbing layer 424. The water-absorbing skeleton structure includes a water-absorbing transverse support structure and a water-absorbing longitudinal support structure. The water-absorbing flexible filter structure 423 is wrapped around both the water-absorbing transverse support structure and the water-absorbing longitudinal support structure, and the water-absorbing layer 424 is filled between the water-absorbing skeleton structures. The above arrangement can prevent the water-absorbing filter structure 42 from deforming during use, and can also further improve the water absorption effect while protecting the water-absorbing skeleton structure through the water-absorbing flexible filter structure 423. The absorbent layer 424 can be a molded part of any material that can achieve the water absorption effect, such as inorganic absorbent materials and organic absorbent materials. The inorganic absorbent material can be anhydrous calcium oxide, and the organic absorbent material can be polyacrylamide and / or polyamide epichlorohydrin.

[0083] According to the present invention, the "lateral" in the water-absorbing transverse support structure refers to the transverse direction in the drawing, and the "longitudinal" in the water-absorbing longitudinal support structure refers to the longitudinal direction in the drawing.

[0084] In one specific embodiment of the present invention, such as Figure 4 and Figure 5As shown, the second separation component also includes a U-shaped separation tube 4 and a water-absorbing filter structure 42 and an oil-absorbing filter structure 43 disposed inside the U-shaped separation tube 4. The U-shaped separation tube 4 includes a U-shaped bottom tube 41, a first expansion tube 45 connected to the air inlet end of the U-shaped bottom tube 41, and a second expansion tube 47 connected to the air outlet end of the U-shaped bottom tube 41. The water-absorbing filter structure 42 is disposed inside the first expansion tube 45, and the oil-absorbing filter structure 43 is disposed inside the second expansion tube 47. The water-absorbing filter structure 42 includes a water-absorbing skeleton structure, a water-absorbing flexible filter structure 423, and a water-absorbing layer 424. The water-absorbing skeleton structure includes a water-absorbing transverse support structure and a water-absorbing longitudinal support structure. The water-absorbing flexible filter structure 423 is wrapped around both the water-absorbing transverse support structure and the water-absorbing longitudinal support structure. The water-absorbing layer 424 is filled between the water-absorbing skeleton structures. The water-absorbing transverse support structure includes at least two first support members 421, and the water-absorbing longitudinal support structure includes at least two second support members 425 and a first support spring piece 422 disposed between the two second support members 425. The lateral support structure for water absorption prevents the water absorption filter structure 42 from deforming laterally, while the longitudinal support structure prevents large deformation of the water absorption filter structure 42 in the longitudinal direction and provides a good buffering effect, mitigating the impact of gas impact on the structure and extending the service life of the second separation component. It also allows for installation in pipes with varying degrees of curvature.

[0085] In one specific embodiment of the present invention, such as Figure 4 and Figure 6 As shown, the second separation component also includes a U-shaped separation tube 4 and a water-absorbing filter structure 42 and an oil-absorbing filter structure 43 disposed inside the U-shaped separation tube 4. The U-shaped separation tube 4 includes a U-shaped bottom tube 41, a first expansion tube 45 connected to the air inlet end of the U-shaped bottom tube 41, and a second expansion tube 47 connected to the air outlet end of the U-shaped bottom tube 41. The water-absorbing filter structure 42 is disposed inside the first expansion tube 45, and the oil-absorbing filter structure 43 is disposed inside the second expansion tube 47. The oil-absorbing filter structure 43 includes an oil-absorbing skeleton structure, an oil-absorbing flexible filter structure 433, and an oil-absorbing layer 434. The oil-absorbing skeleton structure includes an oil-absorbing lateral support structure and an oil-absorbing longitudinal support structure. The oil-absorbing flexible filter structure 433 is wrapped around both the oil-absorbing lateral support structure and the oil-absorbing longitudinal support structure, and the oil-absorbing layer 434 is filled between the oil-absorbing skeleton structures. The above arrangement can prevent the oil-absorbing filter structure 43 from deforming during use, and can also further improve the oil absorption effect while protecting the oil-absorbing skeleton structure through the oil-absorbing flexible filter structure 433. The oil-absorbing layer 434 can be a molded part of any material that can achieve the oil-absorbing effect, such as inorganic oil-absorbing materials and organic oil-absorbing materials. Inorganic oil-absorbing materials can be diatomaceous earth and / or zeolite, and organic oil-absorbing materials can be acrylate oil-absorbing materials.

[0086] According to the present invention, the lateral direction in the oil-absorbing lateral support structure refers to the lateral direction in the drawing, and the longitudinal direction in the oil-absorbing longitudinal support structure refers to the longitudinal direction in the drawing.

[0087] In one specific embodiment of the present invention, such as Figure 4 and Figure 6 As shown, the second separation component also includes a U-shaped separation tube 4 and a water-absorbing filter structure 42 and an oil-absorbing filter structure 43 disposed inside the U-shaped separation tube 4. The U-shaped separation tube 4 includes a U-shaped bottom tube 41, a first expansion tube 45 connected to the air inlet end of the U-shaped bottom tube 41, and a second expansion tube 47 connected to the air outlet end of the U-shaped bottom tube 41. The water-absorbing filter structure 42 is disposed inside the first expansion tube 45, and the oil-absorbing filter structure 43 is disposed inside the second expansion tube 47. The oil-absorbing filter structure 43 includes an oil-absorbing skeleton structure, an oil-absorbing flexible filter structure 433, and an oil-absorbing layer 434. The oil-absorbing skeleton structure includes an oil-absorbing lateral support structure and an oil-absorbing longitudinal support structure. The oil-absorbing flexible filter structure 433 is wrapped around both the oil-absorbing lateral support structure and the oil-absorbing longitudinal support structure. The oil-absorbing layer 434 is filled between the oil-absorbing skeleton structures. The oil-absorbing lateral support structure includes at least two third support members 431, and the oil-absorbing longitudinal support structure includes at least two fourth support members 435 and a second support spring 432 disposed between the two fourth support members 435. The lateral support structure for oil absorption prevents the oil absorption filter structure 43 from deforming laterally, while the longitudinal support structure prevents significant longitudinal deformation of the oil absorption filter structure 43 and provides a good buffering effect, mitigating the impact of gas impact on the structure and extending the service life of the second separation component. It also allows for installation in pipes with varying degrees of curvature.

[0088] According to the present invention, the first support member 421, the second support member 425, the third support member 431, and the fourth support member 435 can be rigid support rings. The first support spring 422 and the second support spring 432 are plate-shaped structures with rectangular cross-sections. A plurality of water-absorbing flexible filter structures 423 and oil-absorbing flexible filter structures 433 are provided, respectively covering the outer and inner surfaces of the first support member 421, the second support member 425, the third support member 431, and the fourth support member 435, and forming an adsorption cavity with the first support member 421, the second support member 425, the third support member 431, or the fourth support member 435 to form a cylindrical closed cavity structure. A plurality of water-absorbing layers 424 or oil-absorbing layers 434 are provided and embedded in the adsorption cavity.

[0089] In one specific embodiment of the present invention, the second separation component further includes a U-shaped separation tube 4 and a water-absorbing filter structure 42 and an oil-absorbing filter structure 43 disposed inside the U-shaped separation tube 4. The water-absorbing filter structure 42 and the oil-absorbing filter structure 43 are arranged along the gas flow direction. An oscillation structure 5 is disposed between the two straight tube sections 4a of the U-shaped separation tube, and the oscillation structure 5 is connected to the two straight tube sections 4a by an elastic structure 6. The oscillation structure 5 enables the straight tube sections 4a of the U-shaped separation tube to oscillate, thereby separating the gas in the liquid phase and improving the separation effect, thus improving the accuracy of subsequent testing of rare gas isotopes in the oil-gas mixture. According to the present invention, the oscillation structure 5 can be any structure capable of realizing liquid oscillation inside the U-shaped separation tube 4. Exemplarily, the oscillation structure 5 can be a commercially available oscillator.

[0090] In one specific embodiment of the present invention, such as Figure 3 As shown, the second separation assembly includes a condenser separator 3, which comprises a separation cylinder 31, a heat exchanger 32 disposed inside the separation cylinder 31, and a heat exchange structure 33 connected to the heat exchanger 32. The heat exchange structure 33 is adapted to exchange heat with the fluid passing through the heat exchanger 32. The second separation assembly also includes a first heat exchange tube 36 sleeved on the cyclone separator 22 and a second heat exchange tube 37 sleeved on the U-shaped separation tube 4. The first heat exchange tube 36 and the second heat exchange tube 37 are adapted to exchange heat with the fluid passing through the heat exchanger 32. This design ensures the heat exchange effect of the heat exchanger 32 and allows the heat obtained from the heat exchange to be used in the cyclone separator 22 and the U-shaped separation tube 4, thereby improving energy utilization efficiency.

[0091] According to the present invention, the first heat exchange tube 36 and the second heat exchange tube 37 are connected to the outlet of the heat exchanger 32 via the second multi-way valve 39.

[0092] In one specific embodiment of the present invention, the second separation component further includes a U-shaped separation tube 4 and a water absorption filter structure 42 and an oil absorption filter structure 43 disposed inside the U-shaped separation tube 4. The water absorption filter structure 42 and the oil absorption filter structure 43 are arranged along the gas flow direction. The liquid outlet of the U-shaped separation tube 4 is connected to a vacuum pump 10 to facilitate the discharge of liquid from the U-shaped separation tube 4.

[0093] In one specific embodiment of the present invention, the second separation component 3 further includes a U-shaped separation tube 4 and a water absorption filter structure 42 and an oil absorption filter structure 43 disposed inside the U-shaped separation tube 4. The water absorption filter structure 42 and the oil absorption filter structure 43 are arranged along the gas flow direction. A second sealing end cap 46 is provided at the air inlet of the U-shaped separation tube 4, and a first sealing end cap 44 is provided at the air outlet of the U-shaped separation tube 4.

[0094] In one specific embodiment of the present invention, the rare gas isotope testing pretreatment device for oil-gas mixtures includes a first separation component 2, a second separation component, and a support frame 1. The first and second separation components are disposed within the support frame 1, and are sequentially connected with each other via gas paths. The first separation component 2 includes a filter structure 21 and a cyclone separator 22. The filter structure 21 has a filter channel 21a and a guide channel 21b. The fluid filtered through the filter channel 21a is suitable for entering the cyclone separator 22 for cyclone separation. The gas obtained after cyclone separation is suitable for entering the second separation component through the guide channel 21b, where water vapor, high-carbon light hydrocarbon components, and the medium are separated. The device can fix and protect the first and second separation components.

[0095] In one specific embodiment of the present invention, the rare gas isotope testing pretreatment device for oil-gas mixtures includes a first separation component 2, a second separation component, and a sampling needle 8. The first separation component 2 and the second separation component 2 are connected sequentially and have interconnected gas paths. The outlet of the second separation component is connected to the sampling needle 8. The first separation component 2 includes a filter structure 21 and a cyclone separator 22. The filter structure 21 has a filter channel 21a and a guide channel 21b. The fluid filtered through the filter channel 21a is suitable for entering the cyclone separator 22 for cyclone separation. The gas obtained after cyclone separation is suitable for entering the second separation component through the guide channel 21b, where it is separated into water vapor, high-carbon light hydrocarbon components, and the medium. According to the present invention, the sampling needle 8 can be an automatic sampling needle, which facilitates direct detection of the separated gas.

[0096] In one specific embodiment of the present invention, a vacuum relief valve is also provided between the gas outlet of the second separation component and the injection needle 8. A vacuum relief valve is also provided at the gas inlet of the entire device to facilitate the entry and exit of gas.

[0097] In one specific embodiment of the present invention, the rare gas isotope testing pretreatment device in the oil-gas mixture includes a first separation component 2, a condenser separator 3, and a U-shaped separation tube 4. The first separation component 2, the condenser separator 3, and the U-shaped separation tube 4 are connected in sequence and have interconnected gas paths. The U-shaped separation tube is provided with a water absorption filter structure 42 and an oil absorption filter structure 43, which are arranged along the gas flow direction. A booster pump 7 is provided between the condenser separator 3 and the U-shaped separation tube 4. The first separation component 2 includes a filter structure 21 and a cyclone separator 22. The filter structure 21 has a filter channel 21a and a flow channel 21b. The fluid filtered through the filter channel 21a is suitable to enter the cyclone separator 22 for cyclone separation. The gas obtained after cyclone separation is suitable to enter the condenser separator 3 through the flow channel 21b. After the condenser separator 3 separates water vapor and high-carbon light hydrocarbon components, the gas enters the U-shaped separation tube 4 and is separated from the medium through the U-shaped separation tube 4.

[0098] As a relatively preferred embodiment of the present invention, see [link to specific embodiment]. Figures 1 to 6The pretreatment device for rare gas isotope testing in an oil-gas mixture includes a first separation component 2, a condenser separator 3, a U-shaped separation tube 4, a support frame 1, and an injection needle 8. The first separation component 2, condenser separator 3, and U-shaped separation tube 4 are housed within the support frame 1, connected sequentially with interconnected gas paths. A booster pump 7 is installed between the condenser separator 3 and the U-shaped separation tube 4. The outlet of the U-shaped separation tube 4 is connected to the injection needle 8, and a vacuum relief valve is also installed between the outlet of the U-shaped separation tube 4 and the injection needle 8. The first separation component 2 includes a filter structure 21 and a cyclone separator 22. The filter structure 21 includes a filter cartridge 211 and a diverter 212 disposed within the filter cartridge 211 and a liquid separator. The adsorption plate 213 and the diversion pipe 212 are adapted to divide the filter cylinder 211 into a filtration channel 21a and a guide channel 21b. The fluid filtered through the filtration channel 21a is suitable for entering the cyclone separator 22 for cyclone separation. The gas obtained after cyclone separation is suitable for entering the condenser separator 3 through the guide channel 21b. After water vapor and high-carbon light hydrocarbon components are separated by the condenser separator 3, the gas enters the U-shaped separation pipe 4, where the medium is separated. The liquid adsorption plate 213 has a rectangular or droplet-shaped cross-section and is set in the filtration channel 21a. Multiple liquid adsorption plates 213 are provided and connected to the outer periphery of the diversion pipe 212, and are arranged in a spiral shape around the axis of the filter cylinder 211. One end is connected to the outer periphery of the diversion pipe 212, and the other end is inclined forward along the fluid flow direction a in the filter channel 21a; the guide channel 21b is a frustum-shaped channel that gradually increases from the inlet end to the outlet end, the included angle between the axis of the filter channel 21a and the filter cylinder 211 is 30-60°, and the width of the filter channel 21a is not less than 5mm; the condenser separator 3 includes a separation cylinder 31, a heat exchanger 32 disposed inside the separation cylinder 31, and a heat exchange structure 33 connected to the heat exchanger 32. The heat exchange structure 33 is suitable for heat exchange of the fluid passing through the heat exchanger 32. The axial section of the heat exchanger 32 is an isosceles trapezoid, and the cross-section of the heat exchanger 32 is set to gradually decrease from front to back along the gas flow direction. The gas coming out of the heat exchanger 32 passes through the first The gas enters the heat exchange structure 33 through the multi-way valve 35 and then exits through the outlet of the heat exchange structure 33. It is then injected into the heat exchanger 32 through the first multi-way valve 35 to achieve heat exchange of the gas passing through the heat exchanger 32. A first induced flow fan 34 is provided between the inlet end of the heat exchanger 32 and the first multi-way valve 35, and a second induced flow fan 38 is provided at the inlet end of the heat exchange structure 33. A water absorption filter structure 42 and an oil absorption filter structure 43 are provided inside the U-shaped separation pipe. The U-shaped separation pipe includes a U-shaped bottom pipe 41, a first expansion pipe 45 connected to the inlet end of the U-shaped bottom pipe 41, and a second expansion pipe 47 connected to the outlet end of the U-shaped bottom pipe 41. The water absorption filter structure 42 is provided inside the first expansion pipe 45, and the oil absorption filter structure 43 is provided inside the second expansion pipe 47.The water-absorbing filter structure 42 includes a water-absorbing skeleton structure, a water-absorbing flexible filter structure 423, and a water-absorbing layer 424. The water-absorbing skeleton structure includes a water-absorbing transverse support structure and a water-absorbing longitudinal support structure. The water-absorbing flexible filter structure 423 is wrapped around both the transverse and longitudinal support structures. The water-absorbing layer 424 fills the spaces between the water-absorbing skeleton structures. The water-absorbing transverse support structure includes at least two first support members 421, and the water-absorbing longitudinal support structure includes at least two second support members 425 and a first support spring 422 disposed between the two second support members 425. The oil-absorbing filter structure 43 includes an oil-absorbing skeleton structure, an oil-absorbing flexible filter structure 433, and an oil-absorbing layer 434. The oil-absorbing skeleton structure includes an oil-absorbing transverse support structure and an oil-absorbing longitudinal support structure. The oil-absorbing flexible filter structure 433 is wrapped around both the transverse and longitudinal support structures. The oil-absorbing layer 434 fills the spaces between the oil-absorbing skeleton structures. The oil-absorbing transverse support structure includes at least two third support members 431. The oil suction longitudinal support structure includes at least two fourth bearing members 435 and a second bearing spring 432 disposed between the two fourth bearing members 435; a first heat exchange tube 36 is sleeved on the cyclone separator 22, and a second heat exchange tube 37 is sleeved on the U-shaped separation tube. The first heat exchange tube 36 and the second heat exchange tube 37 are adapted to exchange heat with the fluid passing through the interior of the heat exchanger 32. The first heat exchange tube 36 and the second heat exchange tube 37 are connected to the outlet of the heat exchanger 32 through a second multi-way valve 39; the two sides of the U-shaped separation tube... An oscillating structure 5 is provided between the two straight pipe sections 4a. The oscillating structure 5 is connected to the two straight pipe sections 4a through an elastic structure 6. A vacuum pump 10 is connected to the liquid outlet of the U-shaped separation tube. A second sealing end cap 46 is provided at the air inlet of the U-shaped separation tube, and a first sealing end cap 44 is provided at the air outlet of the U-shaped separation tube. The drive circuit 9 is connected to the outer surface of the support frame 1 and is electrically connected to the cyclone separator, condenser separator, vacuum pressure relief valve, vacuum pump 10, booster pump 7, and oscillating structure 5, respectively.

[0099] According to the present invention, the driving circuit 9 is a circuit system based on a programmable controller, and the driving circuit is provided with a serial communication circuit.

[0100] When the pretreatment device provided in the above-described basic embodiment of the present invention is in operation, the carrier frame 2, cyclone separator 22, condenser separator, U-shaped separation tube, vacuum relief valve, vacuum pump 10, booster pump 7, automatic injection needle 8, and drive circuit 9 are first assembled to obtain the pretreatment device. The operating parameters of the purification device are set through the drive circuit 9. The vacuum relief valve connecting the cyclone separator 21 and the U-shaped separation tube to the outside is closed. Then, the vacuum pump 10 is driven to run, forming and maintaining a negative pressure environment inside the cyclone separator 22, condenser separator, and U-shaped separation tube. Then, the cylinder containing the natural gas to be purified is connected to the connecting pipe head of the cyclone separator 22, and the vacuum relief valve at the cyclone separator 21 is opened. The pressure difference between the negative pressure environment of the cyclone separator 21 and the pressure inside the cylinder drives the natural gas in the cylinder to be transported to the cyclone separator 22. Before entering the cyclone separator 22, the natural gas to be purified first undergoes preliminary gas-liquid separation through the filter channel 21a set in the cyclone separator 22. Then, a secondary forced gas-liquid separation is performed through a hydrocyclone separator 22. The separated liquid medium is discharged from the bottom of the hydrocyclone separator 22, while the gas-liquid medium is discharged from the top and transported to a condenser separator. After the gas enters the condenser separator, the water vapor mixed in the natural gas is condensed into liquid water and the high-carbon light hydrocarbon components are condensed into liquid light hydrocarbons by utilizing the low-temperature environment. Then, the liquid medium is discharged from the condenser separator. The natural gas after separation is pressurized by the booster pump 7 and transported to the U-shaped separation tube. The natural gas flows into the left half of the U-shaped separation tube along its axis and then flows out from the right half. When the natural gas flows through the U-shaped separation tube, the U-shaped separation tube separates and filters the water and oil media in the natural gas. Finally, the separated and filtered purified natural gas is collected in the right half of the U-shaped separation tube for later use. The vacuum relief valve connected to the right half of the U-shaped separation tube is opened, and then, under the pressure of the purified natural gas in the U-shaped separation tube, the purified natural gas in the U-shaped separation tube is extracted with the help of the automatic sampling needle 8.

[0101] The pretreatment device provided by the above-described basic embodiment of the present invention solves the experimental error of rare gas isotopes in natural gas caused by impurities in natural gas samples from gas cylinders. The support frame 1 is equipped with a cyclone separator 22, a condenser separator, and a U-shaped separation tube. The cyclone separator 22 utilizes a filter structure 21 to efficiently perform initial separation of oil and gas. The condenser separator performs secondary purification of the natural gas, allowing water vapor and high-carbon light hydrocarbon components in the natural gas to condense and separate. The U-shaped separation tube has an internal filter structure, increasing the vertical pipe section length and the oil-gas contact area, better utilizing gravity to separate residual water droplets and oil droplets in the natural gas, further improving the separation effect and greatly enhancing the accuracy of rare gas isotope testing in natural gas.

[0102] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0103] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. Furthermore, various different embodiments of the present invention can also be arbitrarily combined, as long as they do not violate the spirit of the present invention, and should also be regarded as the content disclosed by the present invention.

Claims

1. A pretreatment device for rare gas isotope testing in an oil-gas mixture, characterized in that, The system includes a first separation component (2) and a second separation component. The first separation component (2) and the second separation component are connected and have a gas path connection. The first separation component (2) includes a filter structure (21) and a cyclone separator (22). The filter structure (21) has a filter channel (21a) and a guide channel (21b). The fluid filtered by the filter channel (21a) is suitable to enter the cyclone separator (22) for cyclone separation. The gas obtained by the cyclone separation is suitable to enter the second separation component through the guide channel (21b) and be separated into water vapor, high carbon light hydrocarbon components and media by the second separation component.

2. The pretreatment device for rare gas isotope testing in an oil-gas mixture according to claim 1, characterized in that, The filter structure (21) includes a filter cylinder (211) and a diversion pipe (212) and a liquid adsorption plate (213) disposed in the filter cylinder (211). The diversion pipe (212) is adapted to divide the filter cylinder (211) into a filter channel (21a) and a drainage channel (21b). The liquid adsorption plate (213) is disposed in the filter channel (21a).

3. The pretreatment device for rare gas isotope testing in an oil-gas mixture according to claim 2, characterized in that, One end of the liquid adsorption plate (213) is connected to the diversion pipe (212), and the other end is inclined forward along the fluid flow direction (a) in the filter channel (21a); ​​and / or Multiple liquid adsorption plates (213) are provided, and the multiple liquid adsorption plates (213) are connected to the outside of the diversion pipe (212) and arranged in a spiral shape around the axis of the filter cylinder (211).

4. The pretreatment apparatus for rare gas isotope testing in an oil-gas mixture according to claim 3, characterized in that, The included angle between the axes of the filter channel (21a) and the filter cylinder (211) is 30-60°.

5. The pretreatment apparatus for rare gas isotope testing in an oil-gas mixture according to any one of claims 1 to 4, characterized in that, The second separation component includes a condenser separator (3), which includes a separation cylinder (31), a heat exchanger (32) disposed inside the separation cylinder (31), and a heat exchange structure (33) connected to the heat exchanger (32). The heat exchange structure (33) is adapted to exchange heat with the fluid passing through the heat exchanger (32).

6. The pretreatment apparatus for rare gas isotope testing in an oil-gas mixture according to claim 5, characterized in that, The heat exchanger (32) has an isosceles trapezoidal cross section, and the cross section of the heat exchanger (32) is set to gradually decrease from front to back along the gas flow direction.

7. The pretreatment apparatus for rare gas isotope testing in an oil-gas mixture according to claim 5, characterized in that, The second separation component also includes a U-shaped separation tube (4) and a water absorption filter structure (42) and an oil absorption filter structure (43) disposed in the U-shaped separation tube (4), wherein the water absorption filter structure (42) and the oil absorption filter structure (43) are arranged along the gas flow direction.

8. The pretreatment apparatus for rare gas isotope testing in an oil-gas mixture according to claim 7, characterized in that, The U-shaped separation tube includes a U-shaped bottom tube (41), a first expansion tube (45) connected to the air inlet end of the U-shaped bottom tube (41), and a second expansion tube (47) connected to the air outlet end of the U-shaped bottom tube (41). The water-absorbing filter structure (42) is disposed in the first expansion tube (45), and the oil-absorbing filter structure (43) is disposed in the second expansion tube (47). The water-absorbing filter structure (42) includes a water-absorbing skeleton structure, a water-absorbing flexible filter structure (423), and a water-absorbing layer (424). The water-absorbing skeleton structure includes a water-absorbing transverse support structure and a water-absorbing longitudinal support structure. The water-absorbing flexible filter structure is wrapped around the periphery of the water-absorbing transverse support structure and the water-absorbing longitudinal support structure. The water-absorbing layer (424) is filled between the water-absorbing skeleton structures.

9. The pretreatment apparatus for rare gas isotope testing in an oil-gas mixture according to claim 8, characterized in that, The water-absorbing transverse support structure includes at least two first bearing members (421), and the longitudinal support structure includes at least two second bearing members (425) and a first bearing spring (422) disposed between the two second bearing members (425).

10. The pretreatment apparatus for rare gas isotope testing in an oil-gas mixture according to claim 7, characterized in that, The device further includes an oscillation structure (5) disposed between the two straight pipe sections (4a) of the U-shaped separation tube, the oscillation structure (5) being connected to the two straight pipe sections (4a) by an elastic structure (6).

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