Dehydration device for liquefied natural gas production

Abstract

The utility model discloses a dehydration device for liquefied natural gas production, which belongs to the technical field of dehydration equipment and comprises a dehydration box, a liquid dehydration box arranged at the bottom of the inner side of the dehydration box, a dehydration adsorption plate arranged on the inner side of the dehydration box and above the liquid dehydration box, and a top cover arranged on the upper side of the dehydration box. A liquid dewatering box is arranged on the top cover, a dewatering box is arranged on the top cover, an air inlet pipe is arranged on one side of the dewatering box, one end of the air inlet pipe is arranged in the liquid dewatering box, an exhaust pipe is arranged on the upper side of the top cover, and a dewatering adsorption plate replacing part is arranged on the outer side of the dewatering box and used for automatically replacing a saturated dewatering adsorption plate. And the dehydration plate is troublesome to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of dehydration equipment, in particular to a dehydration device for liquefied natural gas production. Background Art

[0002] In the process of liquefied natural gas production, it is necessary to remove moisture from the raw gas. The dehydration technologies used for natural gas dehydration generally include cooling separation, solvent absorption dehydration, solid adsorption dehydration and membrane dehydration. The more commonly used is solid adsorption dehydration, and the more common solid adsorption dehydration method is molecular sieve dehydration tower technology. Its principle is to use the adsorption effect of molecular sieve to make the water in natural gas adhere to the molecular sieve, and the natural gas flows through the adsorption container to achieve the purpose of removing water from the natural gas.

[0003] In the prior art, when a dehydration device dehydrates liquefied natural gas, the dehydration adsorption plate will become saturated after a certain amount of dehydration. At this time, the dehydration adsorption plate needs to be replaced. Manual replacement will consume a lot of time and affect normal working efficiency. For this reason, we propose a dehydration device for liquefied natural gas production. Utility Model Content

[0004] The utility model is to solve the shortcomings of the prior art and propose a dehydration device for liquefied natural gas production. The dehydration device for liquefied natural gas production solves the problem that the dehydration plate needs to be replaced manually at regular intervals and the replacement of the dehydration plate is troublesome.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A dehydration device for liquefied natural gas production comprises a dehydration box, a liquid dehydration box is arranged at the inner bottom of the dehydration box, a dehydration adsorption plate is arranged on the inner side of the dehydration box and above the liquid dehydration box, a top cover is arranged on the upper side of the dehydration box, an air inlet pipe is arranged on one side of the dehydration box, one end of the air inlet pipe is placed in the liquid dehydration box, an exhaust pipe is arranged on the upper side of the top cover, and a dehydration adsorption plate replacement part is arranged on the outer side of the dehydration box, and the dehydration adsorption plate replacement part is used to automatically replace the saturated dehydration adsorption plate.

[0007] Through the above technical scheme, the natural gas that needs to be dehydrated is injected into the dehydration box through the air inlet pipe, first passes through the liquid dehydration box, and uses the liquid in the liquid dehydration box to perform the first dehydration operation, and then the gas after the first dehydration passes through the dehydration adsorption plate for a second dehydration operation, and finally the dehydrated natural gas is discharged to the next process position through the exhaust pipe of the top cover. After the dehydration adsorption plate is saturated during the dehydration process, the saturated dehydration adsorption plate is replaced by the dehydration adsorption plate replacement part, thereby providing a function of automatically replacing the dehydration adsorption plate in an efficient dehydration working environment.

[0008] Preferably, the dehydration adsorption plate replacement part includes a spare dehydration adsorption plate placement part, a sealing guide part and a saturated dehydration adsorption plate storage part, the spare dehydration adsorption plate placement part is arranged on the left side of the dehydration box, the sealing guide part is arranged on the inner wall of the dehydration box, and the saturated dehydration adsorption plate storage part is arranged on the right side of the dehydration box.

[0009] Preferably, the spare dehydration adsorption plate placement portion includes a storage box, which is arranged on the left side of the dehydration box, a support frame is arranged on the inner bottom of the storage box, a motor is arranged on the left side of the storage box, a threaded rod is arranged at the axial end of the motor, a push plate is threadedly connected to the outer side of the threaded rod, and the lower side of the push plate is slidably connected to the upper side of the support frame, a partition is arranged on the inner left wall of the storage box, a plurality of spare dehydration adsorption plates are arranged on the upper side of the support frame, the height of the spare dehydration adsorption plates is arranged horizontally with the height of the push plate, a clamping piece is arranged on the upper side of the storage box, and a humidity sensor is arranged on the inner wall of the dehydration box and above the dehydration adsorption plate.

[0010] Preferably, the clamping member comprises a fixing plate, the fixing plate is snap-connected to the upper side of the storage box, a rubber sleeve is provided on the lower side of the fixing plate, and a plurality of springs are provided between the rubber sleeve and the fixing plate.

[0011] Preferably, the sealing guide portion includes a compression strip, and a guide port and a slide groove are respectively provided between the dehydration adsorption plate and the dehydration box, the compression strip is arranged in the slide groove, a receiving groove is arranged in the guide port, a plurality of elastic columns are arranged in the receiving groove, a sealing plate is arranged at the end of the elastic column, and both sides of the bottom of the sealing plate are arranged in an inclined structure.

[0012] Preferably, the saturated dehydration adsorption plate storage portion includes a placement box, which is arranged on the right side of the dehydration box, and the lower side of the placement box is snap-connected with a bottom plate.

[0013] Through the above technical scheme, when the humidity sensor detects that the humidity of the natural gas passing through the dehydration adsorption plate is high, which means that the dehydration adsorption plate is saturated and cannot be effectively dehydrated, the humidity sensor sends a signal to the motor to start the motor, and the motor drives the threaded rod to rotate. The threaded rod rotates the thread to transmit the push plate, and the push plate pushes the spare dehydration adsorption plate to move. One side of the spare dehydration adsorption plate pushes the sealing plate, and the sealing plate moves to squeeze the elastic column back into the storage groove. Then the spare dehydration adsorption plate pushes the dehydration adsorption plate, so that the dehydration adsorption plate enters the placement box and falls on the bottom plate, thereby completing the replacement of the dehydration adsorption plate, and then providing a function of automatic replacement of the dehydration adsorption plate, which can effectively and timely replace the dehydration adsorption plate.

[0014] Preferably, a liquid injection pipe is provided at the front side of the dehydration box, an observation window is embedded and provided at the front side of the dehydration box and below the liquid injection pipe, and the liquid dehydration box is made of an acrylic transparent plate component.

[0015] Through the above technical solution, the liquid injection tube is used to replenish the dehydration liquid in the liquid dehydration box, and the observation window is used to observe the liquid level status in the liquid dehydration box.

[0016] In summary, according to the utility model, the natural gas to be dehydrated is injected into the dehydration box through the air inlet pipe, first passes through the liquid dehydration box, and uses the liquid in the liquid dehydration box to perform the first dehydration operation, and then the gas after the first dehydration passes through the dehydration adsorption plate for the second dehydration operation, and finally the dehydrated natural gas is discharged to the next process position through the exhaust pipe of the top cover. When the humidity sensor detects that the humidity of the natural gas passing through the dehydration adsorption plate is relatively high, it means that the dehydration adsorption plate is saturated and cannot be effectively dehydrated. The humidity sensor sends a signal to the motor to start the motor, and the motor drives the threaded rod to rotate. The threaded rod rotates and the thread drives the push plate. The push plate pushes the spare dehydration adsorption plate to move. One side of the spare dehydration adsorption plate pushes the sealing plate. The sealing plate moves and squeezes the elastic column to retract into the storage groove. Then the spare dehydration adsorption plate pushes the dehydration adsorption plate, so that the dehydration adsorption plate enters the placement box and falls on the bottom plate, thereby providing a function of automatically replacing the dehydration adsorption plate in an efficient dehydration working environment.

[0017] In the utility model, the liquid injection pipe is used for replenishing the dehydration liquid in the liquid dehydration box, and the observation window is used for observing the liquid level state in the liquid dehydration box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the explosive structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the dehydration box of the utility model cut from the front side on the axial side;

[0020] Figure 3 This is a schematic diagram of the structure of the front axial side of the utility model;

[0021] Figure 4 It is a schematic structural diagram of the utility model when the shaft side is cut from the front.

[0022] In the figure: 1. dehydration box; 2. liquid dehydration box; 3. dehydration adsorption plate; 4. top cover; 5. air inlet pipe; 6. exhaust pipe; 7. storage box; 8. support frame; 9. motor; 10. threaded rod; 11. push plate; 12. partition; 13. spare dehydration adsorption plate; 14. fixing plate; 15. spring; 16. rubber sleeve; 17. humidity sensor; 18. pressing strip; 19. guide port; 20. storage slot; 21. slide slot; 22. elastic column; 23. sealing plate; 24. placement box; 25. bottom plate; 26. liquid injection tube; 27. observation window. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] like Figure 1-Figure 4 As shown, a dehydration device for liquefied natural gas production includes a dehydration box 1, a liquid dehydration box 2 is arranged at the inner bottom of the dehydration box 1, a dehydration adsorption plate 3 is arranged on the inner side of the dehydration box 1 and above the liquid dehydration box 2, a top cover 4 is arranged on the upper side of the dehydration box 1, an air inlet pipe 5 is arranged on one side of the dehydration box 1, one end of the air inlet pipe 5 is placed in the liquid dehydration box 2, an exhaust pipe 6 is arranged on the upper side of the top cover 4, a liquid injection pipe 26 is arranged on the front side of the dehydration box 1, an observation window 27 is embedded and arranged on the front side of the dehydration box 1 and below the liquid injection pipe 26, the liquid dehydration box 2 adopts an acrylic transparent plate component, a dehydration adsorption plate replacement part is arranged on the outer side of the dehydration box 1, and the dehydration adsorption plate replacement part includes a spare dehydration adsorption plate placement part, a sealing guide part and a saturated dehydration adsorption plate storage part,

[0025] The dehydration adsorption plate placement part is arranged on the left side of the dehydration box 1, and the standby dehydration adsorption plate placement part includes a storage box 7, which is arranged on the left side of the dehydration box 1, and a support frame 8 is arranged at the inner bottom of the storage box 7. A motor 9 is arranged on the left side of the storage box 7, and a threaded rod 10 is arranged at the shaft end of the motor 9. The outer side of the threaded rod 10 is threadedly connected with a push plate 11, and the lower side of the push plate 11 is slidably connected to the upper side of the support frame 8. A partition 12 is arranged on the inner left wall of the storage box 7, and the support frame 8 A plurality of spare dehydration adsorption plates 13 are arranged on the upper side of the storage box 7, and the height of the spare dehydration adsorption plates 13 is arranged horizontally with the height of the push plate 11. A pressing member is arranged on the upper side of the storage box 7. A humidity sensor 17 is arranged on the inner wall of the dehydration box 1 and above the dehydration adsorption plate 3. The pressing member includes a fixing plate 14, and the fixing plate 14 is snap-connected to the upper side of the storage box 7. A rubber sleeve 16 is arranged on the lower side of the fixing plate 14, and a plurality of springs 15 are arranged between the rubber sleeve 16 and the fixing plate 14.

[0026] The sealing guide part is arranged on the inner wall of the dehydration box 1, and the sealing guide part includes a pressing strip 18. A guide port 19 and a slide groove 21 are respectively arranged between the dehydration adsorption plate 3 and the dehydration box 1. The pressing strip 18 is arranged in the slide groove 21. A receiving groove 20 is arranged in the guide port 19. A plurality of elastic columns 22 are arranged in the receiving groove 20. A sealing plate 23 is arranged at the end of the elastic column 22. Both sides of the bottom of the sealing plate 23 are arranged in an inclined structure.

[0027] The saturated dehydration adsorption plate storage part is arranged on the right side of the dehydration box 1, and the saturated dehydration adsorption plate storage part includes a placement box 24, which is arranged on the right side of the dehydration box 1, and the lower side of the placement box 24 is buckled and connected with a bottom plate 25.

[0028] In this embodiment, the natural gas to be dehydrated is injected into the dehydration box 1 through the air inlet pipe 5, first passes through the liquid dehydration box 2, and the liquid in the liquid dehydration box 2 is used for the first dehydration operation, and then the gas after the first dehydration passes through the dehydration adsorption plate 3 for the second dehydration operation, and finally the dehydrated natural gas is discharged to the next process position through the exhaust pipe 6 of the top cover 4. When the humidity sensor 17 detects that the humidity of the natural gas passing through the dehydration adsorption plate 3 is high, it means that the dehydration adsorption plate 3 is saturated and cannot be effectively dehydrated. The device 17 sends a signal to the motor 9 to start the motor 9, and the motor 9 drives the threaded rod 10 to rotate. The threaded rod 10 rotates to transmit the push plate 11, and the push plate 11 pushes the spare dehydration adsorption plate 13 to move. One side of the spare dehydration adsorption plate 13 pushes the sealing plate 23, and the sealing plate 23 moves to squeeze the elastic column 22 back into the storage groove 20, and then the spare dehydration adsorption plate 13 pushes the dehydration adsorption plate 3, so that the dehydration adsorption plate 3 enters the placement box 24 and falls on the bottom plate 25, so that the dehydration adsorption plate can be automatically replaced in an efficient dehydration working environment.

[0029] It should be noted that the storage slot 20, the elastic column 22 and the sealing plate 23 are combined into a sealing member. There are two guide openings 19, which are respectively arranged on the left and right sides of the dehydration box 1. The two guide openings 19 are both provided with sealing members. The two sealing members can be a left sealing member and a right sealing member. The left sealing member is used to seal between the storage box 7 and the dehydration box 1, and the right sealing member is used to seal between the placement box 24 and the dehydration box 1.

[0030] The edges of the dehydration adsorption plate 3 and the standby dehydration adsorption plate 13 are both arranged in an inclined structure, and match the inclined structure of the sealing plate 23.

[0031] The outsides of the air inlet pipe 5 , the exhaust pipe 6 and the liquid injection pipe 26 are all provided with electric control valves.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dehydration device for liquefied natural gas production, characterized in that: The invention comprises a dehydration box (1), wherein a liquid dehydration box (2) is arranged at the inner bottom of the dehydration box (1), a dehydration adsorption plate (3) is arranged on the inner side of the dehydration box (1) and above the liquid dehydration box (2), a top cover (4) is arranged on the upper side of the dehydration box (1), an air inlet pipe (5) is arranged on one side of the dehydration box (1), one end of the air inlet pipe (5) is placed in the liquid dehydration box (2), an exhaust pipe (6) is arranged on the upper side of the top cover (4), and a dehydration adsorption plate replacement part is arranged on the outer side of the dehydration box (1), and the dehydration adsorption plate replacement part is used to automatically replace the saturated dehydration adsorption plate.

2. A dehydration device for liquefied natural gas production according to claim 1, characterized in that: The dehydration adsorption plate replacement part comprises a spare dehydration adsorption plate placement part, a sealing guide part and a saturated dehydration adsorption plate storage part. The spare dehydration adsorption plate placement part is arranged on the left side of the dehydration box (1), the sealing guide part is arranged on the inner wall of the dehydration box (1), and the saturated dehydration adsorption plate storage part is arranged on the right side of the dehydration box (1).

3. A dehydration device for liquefied natural gas production according to claim 2, characterized in that: The standby dehydration adsorption plate placement portion comprises a storage box (7), the storage box (7) is arranged on the left side of the dehydration box (1), a support frame (8) is arranged on the inner bottom of the storage box (7), a motor (9) is arranged on the left side of the storage box (7), a threaded rod (10) is arranged at the shaft end of the motor (9), the outer side of the threaded rod (10) is threadedly connected to a push plate (11), the lower side of the push plate (11) is slidably connected to the upper side of the support frame (8), a partition plate (12) is arranged on the inner left wall of the storage box (7), a plurality of standby dehydration adsorption plates (13) are arranged on the upper side of the support frame (8), the height of the standby dehydration adsorption plates (13) is arranged horizontally with the height of the push plate (11), a pressing member is arranged on the upper side of the storage box (7), and a humidity sensor (17) is arranged on the inner wall of the dehydration box (1) and above the dehydration adsorption plate (3).

4. A dehydration device for liquefied natural gas production according to claim 3, characterized in that: The clamping member comprises a fixing plate (14), the fixing plate (14) being snap-connected to the upper side of the storage box (7), a rubber sleeve (16) being arranged on the lower side of the fixing plate (14), and a plurality of springs (15) being arranged between the rubber sleeve (16) and the fixing plate (14).

5. A dehydration device for liquefied natural gas production according to claim 3, characterized in that: The sealing guide portion comprises a pressing strip (18), a guiding opening (19) and a sliding groove (21) are respectively arranged between the dehydration adsorption plate (3) and the dehydration box (1), the pressing strip (18) is arranged in the sliding groove (21), a receiving groove (20) is arranged in the guiding opening (19), a plurality of elastic columns (22) are arranged in the receiving groove (20), a sealing plate (23) is arranged at the end of the elastic column (22), and both sides of the bottom of the sealing plate (23) are arranged in an inclined structure.

6. A dehydration device for liquefied natural gas production according to claim 5, characterized in that: The saturated dehydration adsorption plate storage section comprises a placement box (24), the placement box (24) is arranged on the right side of the dehydration box (1), and the lower side of the placement box (24) is buckled and connected with a bottom plate (25).

7. A dehydration device for liquefied natural gas production according to claim 1, characterized in that: The front side of the dehydration box (1) is provided with a liquid injection pipe (26), and the front side of the dehydration box (1) and below the liquid injection pipe (26) is provided with an observation window (27) embedded therein. The liquid dehydration box (2) is made of an acrylic transparent plate component.

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