Dehydration device for liquefied natural gas

Abstract

The utility model belongs to liquefied natural gas processing technical field, specifically disclose a dehydration device for liquefied natural gas, including the shell, the left side fixed with water tank in the shell inside, and the left side fixed with connecting pipe no. 1 at water tank top, the top of connecting pipe no. 1 is fixed with material pump no. 2, the right upper corner of water tank and cover body between fixed with gas guide pipe, the centre of the lower part in the shell inside is fixed with sleeve. This dehydration device for liquefied natural gas is rotatable through the sleeve inside the left and right movable connection has the rotary drum, starts material pump no. 1, and will liquefied natural gas be introduced into the connecting pipe no. 1 in the sleeve through connecting pipe no. 2, opens the motor and rotates its connection's upper gear, under the cooperation of bottom gear, can engage and push the rotary drum with the gear ring in the left side annular recess, so that the rotary drum can rotate around connecting pipe no. 1 constantly by heating piece, carries out uniform heating, solved the problem of uneven heating of liquefied natural gas.

Description

Technical Field

[0001] This utility model relates to the field of liquefied natural gas processing technology, specifically to a dehydration device for liquefied natural gas. Background Technology

[0002] Liquefied natural gas (LNG) is a substance that transforms natural gas into a liquid state through cryogenic technology. Its volume is greatly reduced, to only 61% of that of gaseous natural gas, making it easier to transport and store. To prevent LNG from freezing at low temperatures or producing corrosive gases that could damage pipelines, it needs to undergo dehydration treatment.

[0003] Common dehydration methods are nothing more than adsorption and heating evaporation. In order to ensure the safety of LNG production process, dehydration of liquefied natural gas is imperative. However, previous dehydration devices often had a single drying mechanism installed inside the shell, which could not ensure that liquefied natural gas was subjected to uniform and continuous heating treatment, resulting in less than ideal dehydration effect.

[0004] Now, a novel dehydration device for liquefied natural gas is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a dehydration device for liquefied natural gas to solve the problem of uneven heating of liquefied natural gas mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dehydration device for liquefied natural gas, comprising a shell, a cover fixed to the top of the shell, a water tank fixed to the left side inside the shell, a connecting pipe fixed to the left side of the top of the water tank, a material pump fixed to the top of the connecting pipe, a gas guide pipe fixed between the upper right corner of the water tank and the cover, a sleeve fixed to the center of the lower part of the shell, a rotating cylinder movably connected between the left and right sides of the sleeve, heating elements horizontally installed on the upper and lower sides of the inner wall of the rotating cylinder, gears movably connected to the upper left and lower left corners of the sleeve, an annular groove provided around the left side of the rotating cylinder surface, a toothed ring fixed to the inner wall of the annular groove, a motor fixed to the upper left corner of the inner side of the rotating cylinder, a connecting pipe fixed between the lower right corner of the connecting pipe and the shell, and a material pump fixed between the right side of the connecting pipe and the outside of the shell.

[0007] As a further technical solution of this utility model, the lower part of the connecting pipe is horizontally embedded in the rotating cylinder, the gear is symmetrically meshed at the upper and lower parts of the toothed ring in the annular groove, and the left side of the output end of the motor is fixedly connected to the upper gear.

[0008] As a further technical solution of this utility model, a sealing cover is fixed at the center of the top of the water tank, a material pump is installed on the air guide pipe, and triethylene glycol reagent is stored in the water tank.

[0009] As a further technical solution of this utility model, a coil is fixed at the bottom right corner of the air guide tube, and four sets of vertical cylinders are fixed in the coil. The vertical cylinders are filled with molecular sieve particles. Filter membranes are fixed at the top and bottom of the vertical cylinders respectively. A short tube is fixed between the bottom right corner of the coil and the outer shell.

[0010] As a further technical solution of this utility model, the filter membrane is symmetrically arranged at the top and bottom of the vertical cylinder, and the filter membrane and the vertical cylinder are arranged in concentric circles.

[0011] As a further technical solution of this utility model, the coil is bent and inserted between four sets of vertical cylinders, and the coil and the vertical cylinders are on the same vertical plane.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the dehydration device for liquefied natural gas not only achieves uniform heating of liquefied natural gas and initial adsorption of moisture, but also achieves multiple adsorption of moisture;

[0013] (1) A rotating cylinder is connected between the left and right sides inside the sleeve. The material pump is started and liquefied natural gas is introduced into the connecting pipe 1 in the sleeve through the connecting pipe 2 from the lower right corner. The motor is turned on and the upper gear connected to it is rotated. With the cooperation of the bottom gear, the rotating cylinder with toothed ring in the left annular groove can be meshed and rotated so that the rotating cylinder can rotate around the connecting pipe 1 continuously by means of the heating plate on the inner wall to carry out uniform heating, resulting in the initial separation of gas and liquid.

[0014] (2) By storing triethylene glycol reagent in the water tank, the gas and liquid generated in the connecting pipe 1 will be synchronously introduced into the water tank under the extraction action of material pump 2, and directly contact the triethylene glycol reagent in the water tank. Thus, the reagent adsorbs the liquid transmitted from the connecting pipe 1, and the gas rises to the top of the water tank due to its lower density. Then, the material pump 3 extracts it from the gas pipe for further adsorption and purification, which can ensure that the adsorption of water meets the standard.

[0015] (3) By fixing four sets of vertical cylinders in the coil, the bottom of the gas guide pipe is connected to the coil, and four identical vertical cylinders are installed in the coil. The upper and lower parts of the vertical cylinders are sealed by filter membranes, and the inside is filled with molecular sieve particles. When the gas enters the coil from the lower left corner, it is filtered and adsorbed again to prevent the natural gas from still containing liquid. Finally, it is discharged from the short pipe, which can extend the path of dehydration of liquid natural gas. Attached Figure Description

[0016] Figure 1 This is a frontal cross-sectional view of the present invention.

[0017] Figure 2 For the present utility model Figure 1 Enlarged cross-sectional view of a portion of point A in the middle section;

[0018] Figure 3 This is a front view cross-sectional structural diagram of the water tank of this utility model;

[0019] Figure 4 This is a front view cross-sectional structural diagram of the vertical cylinder of this utility model.

[0020] In the diagram: 1. Outer shell; 2. Water tank; 3. Triethylene glycol reagent; 4. Connecting pipe one; 5. Sleeve; 6. Rotary cylinder; 7. Heating element; 8. Connecting pipe two; 9. Vertical cylinder; 10. Coil; 11. Cover; 12. Air guide pipe; 13. Material pump one; 14. Material pump two; 15. Material pump three; 16. Sealing cover; 17. Motor; 18. Gear; 19. Annular groove; 20. Gear ring; 21. Molecular sieve particles; 22. Filter membrane; 23. Short pipe. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4 An embodiment of this utility model provides a dehydration device for liquefied natural gas, comprising an outer shell 1, a cover 11 fixed to the top of the outer shell 1, a water tank 2 fixed to the left side inside the outer shell 1, a connecting pipe 4 fixed to the left side of the top of the water tank 2, a material pump 14 fixed to the top of the connecting pipe 4, a gas guide pipe 12 fixed between the upper right corner of the water tank 2 and the cover 11, a sleeve 5 fixed to the center of the lower part inside the outer shell 1, a rotating cylinder 6 movably connected between the left and right sides inside the sleeve 5, heating plates 7 horizontally installed on the upper and lower sides of the inner wall of the rotating cylinder 6, gears 18 movably connected to the upper left and lower left corners inside the sleeve 5, an annular groove 19 is provided around the left side of the surface of the rotating cylinder 6, a toothed ring 20 is fixed on the inner wall of the annular groove 19, a motor 17 is fixed to the upper left corner of the inner side of the rotating cylinder 6, a connecting pipe 8 is fixed between the lower right corner of the connecting pipe 4 and the outer shell 1, and a material pump 13 is fixed between the right side of the connecting pipe 8 and the outside of the outer shell 1.

[0023] The lower part of the connecting pipe 4 is horizontally embedded in the rotating cylinder 6. The gear 18 is symmetrically meshed in the upper and lower parts of the toothed ring 20 in the annular groove 19. The left side of the output end of the motor 17 is fixedly connected to the upper gear 18.

[0024] Specifically, such as Figure 1 and Figure 2 As shown, start the material pump 13, and introduce liquefied natural gas into the connecting pipe 4 in the sleeve 5 through the connecting pipe 2 8 from the lower right corner. Turn on the motor 17 and rotate the upper gear 18 connected to it. With the cooperation of the bottom gear 18, the rotating cylinder 6 with the toothed ring 20 in the left annular groove 19 can be meshed and pushed, so that the rotating cylinder 6 can be heated evenly by the heating plate 7 on the inner wall continuously rotating around the connecting pipe 4.

[0025] A sealing cap 16 is fixed at the center of the top of the water tank 2. A material pump 15 is installed on the air duct 12. Triethylene glycol reagent 3 is stored in the water tank 2.

[0026] Specifically, such as Figure 1 and Figure 3 As shown, under the extraction action of material pump 2 14, the gas and liquid generated in connecting pipe 1 4 will be synchronously introduced into water tank 2 and directly contact the triethylene glycol reagent 3 in water tank 2. The reagent adsorbs the liquid transmitted from connecting pipe 1 4, while the gas, due to its lower density, rises to the top of water tank 2 and is then extracted from gas pipe 12 by material pump 3 15 for further adsorption and purification.

[0027] A coil 10 is fixed at the bottom right corner of the air duct 12, and four sets of vertical cylinders 9 are fixed in the coil 10. Molecular sieve particles 21 are filled in the vertical cylinders 9. Filter membranes 22 are fixed at the top and bottom of the vertical cylinders 9 respectively. A short tube 23 is fixed between the bottom right corner of the coil 10 and the outer shell 1.

[0028] The filter membrane 22 is symmetrically arranged at the top and bottom of the vertical cylinder 9. The filter membrane 22 and the vertical cylinder 9 are arranged in concentric circles. The coil 10 is bent and inserted between the four sets of vertical cylinders 9. The coil 10 and the vertical cylinder 9 are on the same vertical plane.

[0029] Specifically, such as Figure 1 and Figure 4 As shown, the bottom of the gas guide pipe 12 is connected to the coil 10, and four identical vertical cylinders 9 are installed in the coil 10. The upper and lower parts of the vertical cylinders 9 are sealed by filter membranes 22, and the inside is filled with molecular sieve particles 21. When the gas enters the coil 10 from the lower left corner, it is filtered and adsorbed again to prevent the natural gas from containing liquid. Finally, it is discharged from the short pipe 23.

[0030] Working Principle: In use, the material pump 13 is first started, and liquefied natural gas is introduced from the lower right corner through the connecting pipe 28 into the connecting pipe 4 in the sleeve 5. The motor 17 is then turned on and its connected upper gear 18 is rotated. With the cooperation of the bottom gear 18, the rotating cylinder 6 with the toothed ring 20 in the left annular groove 19 can be engaged and rotated. The rotating cylinder 6, with the heating element 7 on its inner wall, continuously rotates around the connecting pipe 4, providing uniform heating and causing initial gas-liquid separation. Under the extraction action of the material pump 14, the gas and liquid generated in the connecting pipe 4 will... The gas will be synchronously introduced into water tank 2 and come into direct contact with triethylene glycol reagent 3 in water tank 2. The reagent will adsorb the liquid transmitted from connecting pipe 4. The gas, due to its lower density, will rise to the top of water tank 2 and then be drawn out from gas delivery pipe 12 by material pump 3 15. Since the bottom of gas delivery pipe 12 is connected to coil 10 and four identical vertical cylinders 9 are installed in coil 10, both the top and bottom of the vertical cylinders 9 are sealed by filter membrane 22 and contain molecular sieve particles 21. When the gas enters coil 10 from the lower left corner, it will be filtered and adsorbed again and finally discharged from short pipe 23.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dehydration device for liquefied natural gas comprising a housing (1), characterized in that: A cover (11) is fixed to the top of the outer shell (1). A water tank (2) is fixed to the left side inside the outer shell (1). A connecting pipe (4) is fixed to the left side of the top of the water tank (2). A material pump (14) is fixed to the top of the connecting pipe (4). An air guide pipe (12) is fixed between the upper right corner of the water tank (2) and the cover (11). A sleeve (5) is fixed to the center of the lower part inside the outer shell (1). A rotating cylinder (6) is movably connected between the left and right sides inside the sleeve (5). The upper and lower parts of the inner wall of the rotating cylinder (6) are connected to each other. Heating elements (7) are installed horizontally in all sleeves (5). Gears (18) are movably connected to the upper left and lower left corners inside the sleeve (5). An annular groove (19) is provided around the left side of the surface of the rotating cylinder (6), and a toothed ring (20) is fixed on the inner wall of the annular groove (19). A motor (17) is fixed to the upper left corner inside the rotating cylinder (6). A connecting pipe (8) is fixed between the lower right corner of the connecting pipe (4) and the outer shell (1), and a material pump (13) is fixed between the right side of the connecting pipe (8) and the outside of the outer shell (1).

2. The dehydration apparatus for liquefied natural gas according to claim 1, characterized by: The lower part of the connecting pipe (4) is horizontally embedded in the rotating cylinder (6), the gear (18) is symmetrically meshed in the upper and lower parts of the toothed ring (20) in the annular groove (19), and the left side of the output end of the motor (17) is fixedly connected to the upper gear (18).

3. The dehydration device for liquefied natural gas according to claim 1, characterized by: A sealing cap (16) is fixed at the center of the top of the water tank (2), a material pump (15) is installed on the air duct (12), and triethylene glycol reagent (3) is stored in the water tank (2).

4. The dehydration device for liquefied natural gas according to claim 1, characterized by: A coil (10) is fixed at the bottom right corner of the air guide tube (12), and four sets of vertical cylinders (9) are fixed in the coil (10). Molecular sieve particles (21) are filled in the vertical cylinders (9). Filter membranes (22) are fixed at the top and bottom of the vertical cylinders (9). A short tube (23) is fixed between the bottom right corner of the coil (10) and the outer shell (1).

5. The dehydration device for liquefied natural gas according to claim 4, characterized by: The filter membrane (22) is symmetrically arranged at the top and bottom of the vertical cylinder (9), and the filter membrane (22) and the vertical cylinder (9) are arranged in concentric circles.

6. The dehydration device for liquefied natural gas according to claim 4, characterized by: The coil (10) is bent and inserted between the four sets of vertical cylinders (9), and the coil (10) and the vertical cylinders (9) are on the same vertical plane.

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