A natural gas wellhead purification device

Abstract

The utility model relates to natural gas purification technical field, and disclose a kind of natural gas wellhead purification device, comprising: purification box, internal gas guide pipe, wellhead adapter pipe and purification exhaust duct, the side surface of purification box is equipped with mounting hole, the inboard of mounting hole is fixedly connected with internal gas guide pipe, the outer end of internal gas guide pipe is fixedly connected with wellhead adapter pipe, the top surface of purification box is fixedly connected with purification exhaust duct, the inboard of purification box is provided with modified amine liquid;Solid impurity filtering assembly is arranged in the inboard of internal gas guide pipe and wellhead adapter pipe;Acid gas filtering assembly is arranged in the inboard bottom of purification box;Moisture filtering purification assembly is arranged between purification box and purification exhaust duct, the utility model cooperates purification by multistage filtering assembly: double filtration solid particle, fractional treatment acid gas, efficient moisture absorption and regeneration, strong adaptability, reduce energy consumption cost, guarantee natural gas quality and transportation safety.

Description

Technical Field

[0001] This utility model relates to the field of natural gas purification technology, specifically a natural gas wellhead purification device. Background Technology

[0002] Against the backdrop of surging global energy demand, natural gas is increasingly being used as a clean energy source. However, raw natural gas produced from wellheads often contains impurities such as hydrogen sulfide, carbon dioxide, moisture, and solid particles. If these impurities are not purified, they will not only corrode pipelines and equipment due to the strong corrosiveness of hydrogen sulfide and the combination of carbon dioxide and water to form carbonic acid, but also cause pipeline blockage due to the formation of hydrates from moisture. Furthermore, they will reduce combustion efficiency and pose safety hazards. Currently, some natural gas purification technologies suffer from problems such as high energy consumption, high cost, and low efficiency. Traditional devices have limited capacity to handle toxic impurities such as hydrogen sulfide, making it difficult to meet environmental protection and safety standards. Small gas fields lack adaptable and cost-effective purification solutions. Therefore, we propose a natural gas wellhead purification device. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a natural gas wellhead purification device that solves the aforementioned problems.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: A natural gas wellhead purification device, comprising: The purification box includes an internal gas guide pipe, a wellhead adapter pipe, and a purification exhaust pipe. The side of the purification box has an installation hole, the inner side of which is fixedly connected to the internal gas guide pipe. The outer end of the internal gas guide pipe is fixedly connected to the wellhead adapter pipe. The top surface of the purification box is fixedly connected to the purification exhaust pipe. Modified amine liquid is provided inside the purification box. A solid impurity filter assembly is installed inside the internal gas guide pipe and the wellhead transfer pipe. The solid impurity filter assembly is used to filter solid impurities inside the natural gas. An acid gas filter assembly is installed at the bottom inside the purification chamber. The acid gas filter assembly is used to purify the acid gas inside the natural gas. A water filtration and purification assembly is installed between the purification chamber and the purification exhaust duct. The water filtration and purification assembly consists of a water filtration assembly and a water collection assembly.

[0005] Preferably, the solid impurity filtration assembly includes a solid residue filter screen, an air intake drive fan, and a protective filter plate. The solid residue filter screen is fixedly connected to the inner side of the wellhead adapter pipe, the air intake drive fan is fixedly connected to the inner side of the wellhead adapter pipe, the protective filter plate is fixedly connected to the bottom inner side of the internal air guide pipe, the solid residue filter screen has solid filter vent holes on its side, the solid filter vent holes are rectangularly equidistantly distributed on the side of the solid residue filter screen, and the protective filter plate has filter holes on its top surface.

[0006] Preferably, the acid gas filtration assembly includes an activated carbon adsorption plate, a modified amine solution is disposed on the inner bottom of the purification box, and an activated carbon adsorption plate is fixedly connected to the inner side of the purification box. The modified amine solution is used to absorb and purify low-concentration acid gases, and the activated carbon adsorption plate is used to filter and purify high-concentration acid gases.

[0007] Preferably, the moisture filtration assembly includes a heating device, a triethylene glycol dehydration plate, a heat-conducting plate, vent holes, and a filter support frame. The filter support frame is fixedly connected to the inner side of the purification exhaust duct, the heat-conducting plate is fixedly connected to the inner side of the filter support frame, the triethylene glycol dehydration plate is fixedly connected to the bottom inner side of the filter support frame, the heat-conducting plate has vent holes on its top surface, the vent holes are rectangularly and equidistantly distributed on the top surface of the heat-conducting plate, the heating device is fixedly connected to the outer side of the filter support frame, and the heating device is fixedly connected to the outer side of the purification exhaust duct.

[0008] Preferably, the water collection assembly includes a water collection tank, an anti-backflow support plate, and a guide plate. The top side of the purification tank has a water inlet, the water collection tank is fixedly connected to the inside of the water inlet, the anti-backflow support plate is fixedly connected to the top of the inner side of the purification tank, the guide plate is fixedly connected to the top surface of the anti-backflow support plate, and the guide plate is fixedly connected to the inner top of the purification tank.

[0009] Preferably, the anti-backflow support plate has anti-backflow air holes on its inner side, the cross-section of the anti-backflow air holes is conical, the top surface of the guide plate has water guide grooves, the water guide grooves are linearly distributed on the top surface of the guide plate, the bottom surface of the guide plate has connecting micro holes, the connecting micro holes are rectangularly equidistantly distributed on the bottom surface of the guide plate, and the anti-backflow air holes are rectangularly equidistantly distributed on the inner side of the anti-backflow support plate.

[0010] Compared with the prior art, the advantages of this utility model are: A natural gas wellhead purification device is provided, which has the following beneficial effects: The natural gas wellhead purification device provided by this utility model achieves high-efficiency purification through the synergistic effect of multi-stage filtration components. In the solid impurity filtration component, a solid residue filter screen and a protective filter plate double-intercept solid particles, and an air-driven fan enhances airflow stability, preventing impurities from clogging subsequent structures. The acid gas filtration component uses modified amine liquid and activated carbon adsorption plates for graded treatment. Low-concentration acid gases are absorbed by the amine liquid, while high-concentration gases are deeply purified by activated carbon, significantly improving deacidification efficiency. In the moisture filtration and purification component, a triethylene glycol dehydration plate efficiently absorbs moisture, and a heating device combined with a heat-conducting plate can regenerate it for recycling. An anti-backflow support plate and a guide plate guide the water flow to the filter water collection box, preventing secondary mixing with natural gas. The overall device has strong adaptability and can specifically treat various impurities in wellhead natural gas, reducing energy consumption and costs. It is especially suitable for use in small gas fields, effectively ensuring natural gas quality and transportation safety. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled; Figure 3 This is a cross-sectional view of the overall structure of this utility model; Figure 4 for Figure 3 A magnified view of part A in the diagram; Figure 5 for Figure 3 A magnified view of part B in the diagram.

[0012] In the diagram: 1. Purification box; 2. Internal gas guide pipe; 3. Wellhead adapter pipe; 4. Heating device; 5. Filter water collection box; 6. Purification exhaust pipe; 7. Water inlet; 8. Mounting hole; 9. Solid residue filter screen; 10. Suction drive fan; 11. Protective filter plate; 12. Activated carbon adsorption plate; 13. Anti-backflow support plate; 14. Guide plate; 15. Triethylene glycol dehydration plate; 16. Heat conduction plate; 17. Vent hole; 18. Filter water support frame; 19. Anti-backflow vent hole; 20. Connecting micro-hole; 21. Water guide channel; 22. Solid filter vent hole. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-5 This utility model provides a technical solution: A natural gas wellhead purification device, comprising: The purification box 1 includes an internal gas guide pipe 2, a wellhead adapter pipe 3, and a purification exhaust pipe 6. The side of the purification box 1 has an installation hole 8. The internal gas guide pipe 2 is fixedly connected to the inside of the installation hole 8. The wellhead adapter pipe 3 is fixedly connected to the outside of the internal gas guide pipe 2. The purification exhaust pipe 6 is fixedly connected to the top surface of the purification box 1. Modified amine liquid is provided inside the purification box 1. A solid impurity filter assembly is installed inside the internal gas guide pipe 2 and the wellhead transfer pipe 3. The solid impurity filter assembly is used to filter solid impurities inside the natural gas. An acid gas filter assembly is installed at the bottom inside the purification box 1. The acid gas filter assembly is used to purify the acid gas inside the natural gas. A water filtration and purification assembly is installed between the purification chamber 1 and the purification exhaust duct 6. The water filtration and purification assembly consists of a water filtration assembly and a water collection assembly.

[0015] Furthermore, the solid impurity filtration assembly includes a solid residue filter screen 9, an air intake drive fan 10, and a protective filter plate 11. The solid residue filter screen 9 is fixedly connected to the inner side of the wellhead connector 3, the air intake drive fan 10 is fixedly connected to the inner side of the wellhead connector 3, and the protective filter plate 11 is fixedly connected to the bottom inner side of the internal air guide pipe 2. Solid residue filter screen 9 has solid filter vent holes 22 on its side, which are rectangularly and equidistantly distributed on the side of the solid residue filter screen 9. The protective filter plate 11 has filter holes on its top surface. Through the action of the solid impurity filtration assembly, solid impurities in natural gas are filtered.

[0016] Furthermore, the acid gas filtration assembly includes an activated carbon adsorption plate 12. A modified amine solution is provided on the inner side of the bottom of the purification box 1, and the activated carbon adsorption plate 12 is fixedly connected to the inner side of the purification box 1. The modified amine solution is used to absorb and purify low-concentration acid gases, and the activated carbon adsorption plate 12 is used to filter and purify high-concentration acid gases. Through the action of the acid gas filtration assembly, the acid gas is filtered and purified.

[0017] Furthermore, the moisture filtration assembly includes a heating device 4, a triethylene glycol dehydration plate 15, a heat-conducting plate 16, vent holes 17, and a filter support frame 18. The filter support frame 18 is fixedly connected to the inner side of the purification exhaust duct 6, and the heat-conducting plate 16 is fixedly connected to the inner side of the filter support frame 18. The triethylene glycol dehydration plate 15 is fixedly connected to the bottom inner side of the filter support frame 18. Vent holes 17 are provided on the top surface of the heat-conducting plate 16, and the vent holes 17 are distributed in a rectangular and equidistant manner on the top surface of the heat-conducting plate 16. The heating device 4 is fixedly connected to the outer side of the filter support frame 18, and the heating device 4 is fixedly connected to the outer side of the purification exhaust duct 6. Through the action of the moisture filtration assembly, moisture is filtered and purified. At the same time, when not in use, the moisture inside the triethylene glycol dehydration plate 15 is discharged through the cooperation of the heating device 4 and the heat-conducting plate 16, so as to facilitate the next filtration and purification of moisture.

[0018] Furthermore, the water collection assembly includes a water collection box 5, an anti-backflow support plate 13, and a guide plate 14. A water inlet 7 is provided on the top side of the purification box 1. The water collection box 5 is fixedly connected to the inside of the water inlet 7. The anti-backflow support plate 13 is fixedly connected to the top inside of the purification box 1. The guide plate 14 is fixedly connected to the top surface of the anti-backflow support plate 13. The guide plate 14 is fixedly connected to the top inside of the purification box 1. Through the action of the water collection assembly, the filtered water is collected in a concentrated manner.

[0019] Furthermore, the anti-backflow support plate 13 has an anti-backflow vent 19 on its inner side, the anti-backflow vent 19 has a conical cross-section, the guide plate 14 has a water guide groove 21 on its top surface, the water guide groove 21 is linearly distributed on the top surface of the guide plate 14, the guide plate 14 has a connecting micro hole 20 on its bottom surface, the connecting micro hole 20 is rectangularly equidistantly distributed on the bottom surface of the guide plate 14, and the anti-backflow vent 19 is rectangularly equidistantly distributed on the inner side of the anti-backflow support plate 13.

[0020] Structural Description: Purification box 1: It has mounting holes 8 on the side, and a purification exhaust pipe 6 is connected to the top. The inner side is equipped with modified amine liquid, activated carbon adsorption plate 12, etc., providing core space for natural gas purification. Internal gas guide pipe 2: One end is connected to the wellhead transfer pipe 3, and the other end is connected to the purification box 1 through the installation hole 8. The bottom inner side is fixed with a protective filter plate 11 for transporting and further filtering natural gas. Wellhead transfer pipe 3: connects the wellhead to the internal gas pipe 2, with a solid residue filter screen 9 and a suction drive fan 10 fixed on the inside to receive raw natural gas and perform preliminary filtration; Heating device 4: Fixed on the outside of the purification exhaust pipe 6 and the filter support frame 18, heat is transferred through the heat conduction plate 16, and used for the regeneration of the triethylene glycol dehydration plate 15; Water collection box 5: connected to purification box 1 via water inlet 7, used to collect condensate and prevent secondary water mixing; Purification exhaust pipe 6: One end is connected to the top surface of purification box 1, the inner side is fixed with water filter support frame 18, and the outer side is equipped with heating device 4, which is the output channel of purified natural gas. Water inlet 7: Located on the top side of the purification box 1, with the inner side connected to the water collection box 5, used to drain water; Mounting hole 8: It is opened on the side of the purification box 1, and the internal gas guide tube 2 is fixed on the inside, providing a mounting point for it; Solid residue filter screen 9: Fixed inside the wellhead connector 3, with rectangular equidistant solid filter vents 22 on the side to intercept large solid particles. Suction drive fan 10: Fixed inside the wellhead transfer pipe 3, it enhances airflow stability and propels natural gas into subsequent stages; Protective filter plate 11: Fixed to the inner bottom of the internal air duct 2, with filter holes on the top surface for secondary filtration of fine solid impurities; Activated carbon adsorption plate 12: fixed inside the purification box 1, used to filter and purify high-concentration acidic gases; Anti-backflow support plate 13: fixed to the top of the inner side of the purification box 1, with rectangular equidistantly distributed conical anti-backflow vent holes 19 to prevent condensate from flowing back; Guide plate 14: Fixed to the top surface of the anti-backflow support plate 13 and the top of the inner side of the purification box 1, with a linear water guide groove 21 on the top surface and rectangular equidistant micro holes 20 on the bottom surface to collect and guide condensate. Triethylene glycol dehydration plate 15: Fixed to the bottom inside the filter support frame 18, it adsorbs residual moisture in natural gas to achieve deep dehydration; Heat conduction plate 16: fixed inside the filter support frame 18, with rectangular equidistant vent holes 17 on the top surface to transfer heat to the triethylene glycol dehydration plate 15 and allow natural gas to pass through; Vent hole 17: Located on the top surface of heat conduction plate 16, allowing natural gas to flow to purification exhaust pipe 6; Filter support frame 18: Fixed inside the purification exhaust pipe 6, with heat conduction plate 16 and triethylene glycol dehydration plate 15 installed inside, and heating device 4 connected to the outside, providing installation support for the water filtration assembly; Anti-backflow vent 19: It is located inside the anti-backflow support plate 13 and has a conical cross-section to allow natural gas to rise and prevent water backflow; Connecting micro-holes 20: These are formed on the bottom surface of the guide plate 14, distributed in a rectangular shape at equal intervals, to receive condensate from the natural gas; Water guide channel 21: It is formed on the top surface of the guide plate 14 and is distributed in a linear shape to guide the condensate to the water delivery hole 7; Solid filter vents 22: These are located on the side of the solid residue filter screen 9 and are distributed in a rectangular, equidistant pattern to allow natural gas to pass through while intercepting large particulate impurities. Working Principle: When this invention is needed, raw natural gas enters the device through the wellhead transfer pipe 3. It first passes through the solid impurity filtration components: the solid residue filter screen 9 intercepts large particles of impurities, the suction-driven fan 10 enhances airflow stability, and pushes the natural gas into the internal gas guide pipe 2. The protective filter plate 11 further filters fine solid impurities to prevent clogging of subsequent components. The purified natural gas enters the purification tank 1, where modified amine liquid at the bottom absorbs low-concentration acidic gases. High-concentration acidic gases that are not absorbed are then deeply purified by the activated carbon adsorption plate 12, achieving efficient and graded removal of acidic gases, resulting in natural gas free of acidic gases. The natural gas flows upwards and enters the top through the conical anti-backflow vent 19 of the anti-backflow support plate 13. The water in the natural gas condenses through the connecting micro-holes 20 on the bottom surface of the guide plate 14 and flows into the filter water collection box 5 through the water inlet 7 along the water guide channel 21, preventing the water from flowing back into the purification box. The natural gas enters the purification exhaust pipe 6. The triethylene glycol dehydration plate 15 in the water filtration assembly adsorbs the residual water. The heat conduction plate 16 is heated by the heating device 4, which can periodically evaporate and discharge the water in the triethylene glycol. The water is then guided and collected through the guide plate 14 to regenerate the dehydration plate. The purified natural gas is output from the purification exhaust pipe 6 through the vent 17, completing the entire purification process.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A natural gas wellhead purification device, characterized in that, include: The purification box (1), internal gas guide pipe (2), wellhead adapter pipe (3) and purification exhaust pipe (6) are provided. The side of the purification box (1) is provided with an installation hole (8). The inner side of the installation hole (8) is fixedly connected to the internal gas guide pipe (2). The outer end of the internal gas guide pipe (2) is fixedly connected to the wellhead adapter pipe (3). The top surface of the purification box (1) is fixedly connected to the purification exhaust pipe (6). The inner side of the purification box (1) is provided with modified amine liquid. A solid impurity filter assembly is installed inside the internal gas guide pipe (2) and the wellhead transfer pipe (3). The solid impurity filter assembly is used to filter solid impurities inside the natural gas. An acid gas filter assembly is installed at the bottom inside the purification box (1), which is used to purify the acid gas inside the natural gas. A water filtration and purification assembly is installed between the purification box (1) and the purification exhaust duct (6), the water filtration and purification assembly consisting of a water filtration assembly and a water collection assembly.

2. The natural gas wellhead purification device according to claim 1, characterized in that, The solid impurity filtration assembly includes a solid residue filter screen (9), an air intake drive fan (10), and a protective filter plate (11). The solid residue filter screen (9) is fixedly connected to the inner side of the wellhead adapter pipe (3). The air intake drive fan (10) is fixedly connected to the inner side of the wellhead adapter pipe (3). The protective filter plate (11) is fixedly connected to the bottom inner side of the internal air guide pipe (2). Solid residue filter screen (9) has solid filter ventilation holes (22) on its side. The solid filter ventilation holes (22) are rectangularly equidistantly distributed on the side of solid residue filter screen (9). The top surface of the protective filter plate (11) has filter holes.

3. The natural gas wellhead purification device according to claim 1, characterized in that, The acid gas filtration assembly includes an activated carbon adsorption plate (12). A modified amine solution is provided on the inner side of the bottom of the purification box (1). The activated carbon adsorption plate (12) is fixedly connected to the inner side of the purification box (1). The modified amine solution is used to absorb and purify low-concentration acid gases, and the activated carbon adsorption plate (12) is used to filter and purify high-concentration acid gases.

4. A natural gas wellhead purification device according to claim 1, characterized in that, The moisture filtration assembly includes a heating device (4), a triethylene glycol dehydration plate (15), a heat-conducting plate (16), vent holes (17), and a water filtration support frame (18). The water filtration support frame (18) is fixedly connected to the inner side of the purification exhaust duct (6). The heat-conducting plate (16) is fixedly connected to the inner side of the water filtration support frame (18). The triethylene glycol dehydration plate (15) is fixedly connected to the bottom inner side of the water filtration support frame (18). The heat-conducting plate (16) has vent holes (17) on its top surface. The vent holes (17) are distributed in a rectangular equidistant pattern on the top surface of the heat-conducting plate (16). The heating device (4) is fixedly connected to the outer side of the water filtration support frame (18). The heating device (4) is fixedly connected to the outer side of the purification exhaust duct (6).

5. A natural gas wellhead purification device according to claim 1, characterized in that, The water collection assembly includes a water collection box (5), an anti-backflow support plate (13), and a guide plate (14). The top side of the purification box (1) is provided with a water inlet (7). The water collection box (5) is fixedly connected to the inside of the water inlet (7). The anti-backflow support plate (13) is fixedly connected to the top of the inner side of the purification box (1). The guide plate (14) is fixedly connected to the top surface of the anti-backflow support plate (13). The guide plate (14) is fixedly connected to the inner top of the purification box (1).

6. A natural gas wellhead purification device according to claim 5, characterized in that, The anti-backflow support plate (13) has an anti-backflow air hole (19) on its inner side. The anti-backflow air hole (19) has a conical cross section. The top surface of the guide plate (14) has a water guide groove (21). The water guide groove (21) is linearly distributed on the top surface of the guide plate (14). The bottom surface of the guide plate (14) has a connecting micro hole (20). The connecting micro hole (20) is rectangularly equidistantly distributed on the bottom surface of the guide plate (14). The anti-backflow air hole (19) is rectangularly equidistantly distributed on the inner side of the anti-backflow support plate (13).

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