Natural gas deacidification device

Abstract

The utility model discloses a natural gas deacidification device, which belongs to the field of natural gas deacidification and comprises a deacidification tank, a dehumidification box is fixedly mounted at the top end of the deacidification tank, a driving motor is fixedly mounted at the center of the top end of the inner wall of the deacidification tank, and the output end of the driving motor is in transmission connection with a transmission shaft through a coupler. A rotating disc is fixedly installed at one end of the transmission shaft, four ventilation pipes are arranged at the top end of the rotating disc, air holes are evenly formed in the outer wall of each ventilation pipe, fixing rings are fixedly installed on the outer walls of the ventilation pipes and fixedly connected with the top end of the rotating disc, and an air collecting box is fixedly installed at the bottom end of the rotating disc. The bent ends of the four ventilation pipes penetrate through the rotating disc through the through grooves, natural gas can enter the deacidification tank from the bottom of the deacidification tank to be fully mixed with amine liquid, the mixing time is prolonged, meanwhile, water vapor in the purified natural gas can be effectively removed, and therefore the natural gas deacidification effect and efficiency are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of natural gas deacidification, and more specifically, to a natural gas deacidification device. Background Technology

[0002] Natural gas is a mixture of hydrocarbon and non-hydrocarbon gases naturally occurring in underground strata. Its main component is methane (70%-90%), with small amounts of hydrocarbons such as ethane and propane, and non-hydrocarbon components such as carbon dioxide and hydrogen sulfide. It has a high calorific value and burns cleanly, making it widely used in power generation, industrial fuel, and chemical raw materials. However, natural gas contains acidic gases (mainly H2S and CO2). H2S combines with moisture to form an acidic solution, accelerating the electrochemical corrosion of metal pipelines and equipment. CO2 forms carbonic acid under high pressure and low temperature, further accelerating equipment corrosion. H2S is highly toxic; leaks can threaten human health and pollute the environment. CO2 lowers the calorific value of natural gas and forms a solid blockage in pipelines at extremely low temperatures. Therefore, deacidification treatment is necessary when using natural gas. A common deacidification method utilizes an alcohol amine solution to react reversibly with the acidic gases, achieving a removal efficiency of over 99%. The mixed amine method is suitable for large-scale industrial applications.

[0003] Based on the above, the inventors have discovered that most existing mixed amine deacidification devices have insufficient contact after natural gas enters, resulting in low efficiency during amine liquid mixing and deacidification. This necessitates multiple cycles of mixing, which greatly reduces the efficiency of natural gas deacidification. Therefore, in view of this, the inventors have researched and improved the existing structure to provide a natural gas deacidification device with greater practical value. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a natural gas deacidification device, which can enable natural gas to enter from the bottom of the deacidification tank and fully mix with amine liquid. While increasing the mixing time, it can effectively remove water vapor from the purified natural gas, thereby greatly improving the effect and efficiency of natural gas deacidification.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A natural gas deacidification device includes a deacidification tank. A dehumidification box is fixedly installed at the top of the deacidification tank. A drive motor is fixedly installed at the center of the top of the inner wall of the deacidification tank. The output end of the drive motor is connected to a drive shaft via a coupling. A turntable is fixedly installed at one end of the drive shaft. Four vent pipes are provided at the top of the turntable. Each vent pipe has evenly spaced air holes on its outer wall. A fixing ring is fixedly installed on the outer wall of each vent pipe and is fixedly connected to the top of the turntable. A gas collection box is fixedly installed at the bottom of the turntable. The bent ends of the four vent pipes pass through the turntable via slots and extend into the interior of the gas collection box. The bottom of the deacidification tank is fixedly equipped with a venting rotary joint via a support rod, and the rotating end of the venting rotary joint extends into the interior of the deacidification tank and communicates with the interior of the gas collection box. The fixed end of the venting rotary joint is fixedly connected to an air inlet pipe. The outer wall of the deacidification tank is fixedly connected to a liquid inlet pipe, and the liquid inlet pipe communicates with the deacidification tank. A pair of liquid outlet pipes are fixedly installed at the bottom of the deacidification tank, and a pair of gas supply pipes are fixedly installed at the top of the deacidification tank. The interior of the dehumidification box is equipped with a glass fiber filter plate and an activated alumina filter plate. The top of the dehumidification box is connected to a sealing cap via a thread, and an air outlet pipe is fixedly installed at the top of the sealing cap.

[0009] Furthermore, one end of each of the four ventilation tubes is bent, and the four ventilation tubes are arranged in a cross shape.

[0010] Furthermore, four agitator blocks are fixedly installed at the top of the turntable, and the four agitator blocks are respectively located between the four air pipes.

[0011] Furthermore, a stop plate is sleeved on the outer side of the drive shaft, and the stop plate is fixedly connected to the inner wall of the deacidification tank by a support rod, and the inlet pipe is located below the stop plate.

[0012] Furthermore, a pair of gas supply pipes are located inside the dehumidification chamber, and the interior of the deacidification tank is interconnected with the interior of the dehumidification chamber through the gas supply pipes.

[0013] Furthermore, the inner wall of the dehumidification box is provided with a pair of sliding grooves, and a slider is slidably installed inside each of the two sliding grooves. The sides of the two sliders that are close to each other are fixedly connected to the edges of the outer walls of the glass fiber filter plate and the activated alumina filter plate, respectively.

[0014] Furthermore, a fixing frame is fixedly installed on one side of the pair of sliders that are close to each other, and the fixing frame is located between the glass fiber filter plate and the activated alumina filter plate. A pull ring is fixedly installed on one end of each pair of sliders.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This solution, by setting up a turntable, a vent pipe, and a stop plate, allows amine solution to enter the deacidification tank through the inlet pipe after the device is put into use. The amine solution is then added to the bottom of the stop plate inside the deacidification tank. Subsequently, the turntable is rotated by a drive motor via a transmission shaft. At the same time, natural gas is delivered to the gas collection box through the vent pipe via a venting rotary joint. Then, natural gas is pumped into the amine solution inside the deacidification tank through the vent pipe. When the natural gas enters the amine solution, bubbles are generated. At the same time, the stirring block on the turntable agitates the amine solution, allowing the natural gas to stay inside for a long time and be fully mixed. The purified gas then enters the dehumidification chamber through the gas delivery pipe. Water vapor mixed in the gas is filtered through glass fiber filter plates and activated alumina filter plates. Finally, the deacidified natural gas is discharged through the gas outlet pipe. This device can effectively improve the effect and efficiency of natural gas deacidification. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the structure of this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the turntable structure of this utility model;

[0021] Figure 4 This is a three-dimensional disassembled schematic diagram of the dehumidification box structure of this utility model.

[0022] Explanation of the labels in the diagram:

[0023] 1. Deacidification tank; 2. Dehumidification box; 3. Drive motor; 4. Transmission shaft; 5. Turntable; 6. Vent pipe; 7. Air vent; 8. Fixing ring; 9. Gas collection box; 10. Vent rotary joint; 11. Air inlet pipe; 12. Liquid stop plate; 13. Liquid inlet pipe; 14. Liquid outlet pipe; 15. Gas delivery pipe; 16. Glass fiber filter plate; 17. Activated alumina filter plate; 18. Sealing cover; 19. Air outlet pipe; 20. Slide groove; 21. Sliding block; 22. Fixing frame; 23. Pull ring; 24. Stirring block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figures 1-4 A natural gas deacidification device includes a deacidification tank 1, a dehumidification box 2 fixedly installed at the top of the deacidification tank 1, a drive motor 3 fixedly installed at the center of the top of the inner wall of the deacidification tank 1, a drive shaft 4 connected to the output end of the drive motor 3 via a coupling, a turntable 5 fixedly installed at one end of the drive shaft 4, four vent pipes 6 provided at the top of the turntable 5, each vent pipe 6 having evenly distributed air holes 7 on its outer wall, a fixing ring 8 fixedly installed on the outer wall of the vent pipe 6 and fixedly connected to the top of the turntable 5, a gas collection box 9 fixedly installed at the bottom of the turntable 5, and the bent ends of the four vent pipes 6 passing through the turntable 5 via through grooves and extending into the interior of the gas collection box 9, a venting rotary joint 10 fixedly installed at the bottom of the deacidification tank 1 via a support rod, the rotating end of the venting rotary joint 10 extending into the interior of the deacidification tank 1 and communicating with the interior of the gas collection box 9, the venting rotary joint 1... The device has a fixed connection to an air inlet pipe 11 at the fixed end of the deacidification tank 1, and a fixed connection to an inlet pipe 13 on the outer wall of the deacidification tank 1, with the inlet pipe 13 communicating with the deacidification tank 1. A pair of drain pipes 14 are fixedly installed at the bottom of the deacidification tank 1, and a pair of gas supply pipes 15 are fixedly installed at the top of the deacidification tank 1. The dehumidification box 2 is equipped with a glass fiber filter plate 16 and an activated alumina filter plate 17. The top of the dehumidification box 2 is connected to a sealing cover 18 by a thread, and an air outlet pipe 19 is fixedly installed at the top of the sealing cover 18. The device delivers natural gas to the bottom of the deacidification tank 1 through the air pipe 6, allowing the natural gas to rise from the bottom of the amine liquid. The stirring block 24, along with the turntable 5, can stir the amine liquid, giving the amine liquid a certain centrifugal force, so that the natural gas can stably enter the interior of the dehumidification box 2 after mixing. This device greatly improves the efficiency and effect of natural gas deacidification.

[0027] See Figure 2 , Figure 3 One end of each of the four vent pipes 6 is bent, and the four vent pipes 6 are arranged in a cross shape. Four stirring blocks 24 are fixedly installed at the top of the turntable 5, and the four stirring blocks 24 are located between the four vent pipes 6. The uniform distribution of the vent pipes 6 and the stirring blocks 24 ensures that the natural gas is fully mixed when it enters the amine liquid.

[0028] See Figure 2 , Figure 3 A stop plate 12 is sleeved on the outside of the drive shaft 4. The stop plate 12 is fixedly connected to the inner wall of the deacidification tank 1 by a support rod, and the inlet pipe 13 is located below the stop plate 12. A pair of gas supply pipes 15 are located inside the dehumidification box 2, and the inside of the deacidification tank 1 is connected to the inside of the dehumidification box 2 by the gas supply pipes 15. By connecting the inlet pipe 13 to the inside of the deacidification tank 1 by a support rod, the inlet pipe 13 can fully restrict the amine liquid and prevent the amine liquid from splashing and causing a decrease in mixing efficiency.

[0029] See Figure 2 , Figure 4 The inner wall of the dehumidification box 2 is provided with a pair of sliding grooves 20. A slider 21 is slidably installed inside each of the sliding grooves 20. The sides of the pair of sliders 21 that are close to each other are fixedly connected to the edges of the outer walls of the glass fiber filter plate 16 and the activated alumina filter plate 17, respectively. A fixing frame 22 is fixedly installed on the sides of the pair of sliders 21 that are close to each other. The fixing frame 22 is located between the glass fiber filter plate 16 and the activated alumina filter plate 17. A pull ring 23 is fixedly installed on one end of each pair of sliders 21. By setting the glass fiber filter plate 16 and the activated alumina filter plate 17 on the sliders 21, the glass fiber filter plate 16 and the activated alumina filter plate 17 can be easily removed from the inside of the dehumidification box 2 for replacement and maintenance by the staff, thereby improving the convenience of using the device.

[0030] In operation: First, the amine solution enters the deacidification tank 1 through the inlet pipe 13. The amine solution is added to the bottom of the stop plate 12 inside the deacidification tank 1. Then, the drive motor 3 drives the turntable 5 to rotate through the transmission shaft 4. At the same time, the air inlet pipe 11 sends natural gas to the gas collection box 9 through the air vent 10. Then, the natural gas is pumped into the amine solution inside the deacidification tank 1 through the air hole 7 on the air vent pipe 6. When the natural gas enters the amine solution, bubbles are generated in the amine solution. At the same time, the stirring block 24 on the turntable 5 agitates the amine solution, allowing the natural gas to remain inside. The gas is mixed thoroughly over a long period of time. The purified gas then enters the dehumidification chamber 2 through the gas supply pipe 15. The water vapor mixed in the gas is filtered by the glass fiber filter plate 16 and the activated alumina filter plate 17. The deacidified natural gas is then discharged through the gas outlet pipe 19. When the glass fiber filter plate 16 and the activated alumina filter plate 17 need maintenance, the sealing cover 18 is removed from the dehumidification chamber 2. The glass fiber filter plate 16 and the activated alumina filter plate 17 can be removed from the dehumidification chamber 2 for replacement and maintenance by pulling the slider 21 upward with the pull ring 23.

[0031] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A natural gas deacidification device, comprising a deacidification tank (1), characterized in that: A dehumidification box (2) is fixedly installed at the top of the deacidification tank (1). A drive motor (3) is fixedly installed at the center of the top of the inner wall of the deacidification tank (1). The output end of the drive motor (3) is connected to a drive shaft (4) via a coupling. A turntable (5) is fixedly installed at one end of the drive shaft (4). Four vent pipes (6) are provided at the top of the turntable (5). Air holes (7) are evenly opened on the outer wall of each vent pipe (6). A fixing ring (8) is fixedly installed on the outer wall of the vent pipe (6), and the fixing ring (8) is fixedly connected to the top of the turntable (5). A gas collection box (9) is fixedly installed at the bottom of the turntable (5). The bent ends of the four vent pipes (6) pass through the turntable (5) through through grooves and extend into the interior of the gas collection box (9). The bottom of the deacidification tank (1) is fixed by a support rod. A venting rotary joint (10) is fixedly provided, and the rotating end of the venting rotary joint (10) extends into the interior of the deacidification tank (1) and communicates with the interior of the gas collection box (9). An air inlet pipe (11) is fixedly connected to the fixed end of the venting rotary joint (10). An inlet pipe (13) is fixedly connected to the outer wall of the deacidification tank (1), and the inlet pipe (13) communicates with the deacidification tank (1). A pair of drain pipes (14) are fixedly provided at the bottom end of the deacidification tank (1). A pair of gas supply pipes (15) are fixedly provided at the top end of the deacidification tank (1). A glass fiber filter plate (16) and an activated alumina filter plate (17) are provided inside the dehumidification box (2). A sealing cover (18) is threadedly connected to the top end of the dehumidification box (2). An outlet pipe (19) is fixedly installed at the top end of the sealing cover (18).

2. The natural gas deacidification device according to claim 1, characterized in that: One end of each of the four ventilation tubes (6) is bent, and the four ventilation tubes (6) are arranged in a cross shape.

3. The natural gas deacidification device according to claim 1, characterized in that: Four stirring blocks (24) are fixedly installed on the top of the turntable (5), and the four stirring blocks (24) are respectively located between the four air pipes (6).

4. A natural gas deacidification device according to claim 1, characterized in that: A stop plate (12) is sleeved on the outside of the drive shaft (4). The stop plate (12) is fixedly connected to the inner wall of the deacidification tank (1) by a support rod, and the inlet pipe (13) is located below the stop plate (12).

5. A natural gas deacidification device according to claim 1, characterized in that: A pair of gas supply pipes (15) are located inside the dehumidification box (2), and the interior of the deacidification tank (1) is connected to the interior of the dehumidification box (2) through the gas supply pipes (15).

6. A natural gas deacidification device according to claim 1, characterized in that: The inner wall of the dehumidification box (2) is provided with a pair of sliding grooves (20), and a slider (21) is slidably installed inside each of the pair of sliding grooves (20). The sides of the pair of sliders (21) that are close to each other are fixedly connected to the edges of the outer walls of the glass fiber filter plate (16) and the activated alumina filter plate (17), respectively.

7. A natural gas deacidification device according to claim 6, characterized in that: A fixing frame (22) is fixedly installed on one side of the pair of sliders (21) that are close to each other, and the fixing frame (22) is located between the glass fiber filter plate (16) and the activated alumina filter plate (17). A pull ring (23) is fixedly installed on one end of each pair of sliders (21).

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