CN210367582U

CN210367582U - Liquefied natural gas mill tank wagon tail gas recovery unit

Info

Publication number: CN210367582U
Application number: CN201921416890.9U
Authority: CN
Inventors: 关顺伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-04-21
Anticipated expiration: 2029-08-28

Abstract

The utility model relates to the technical field of new energy and energy conservation, in particular to a tail gas recovery device for a tank car of a liquefied natural gas factory, which is convenient for recovering tail gas in a gas storage tank, reduces the production cost and improves the use reliability; including the tank wagon, the gas holder, the buffer memory jar, denitrogenation tower and nitrogen gas pressurized tank, the gas holder is installed on the tank wagon, the left side and the right side of gas holder bottom are provided with left support and right support respectively, the bottom of right support and the top right side rotatable coupling of tank wagon, the bottom of left side support is provided with elevating gear, elevating gear includes the bottom plate, including a motor, an end cap, a controller, and a cover plate, two sets of screwed pipe, two sets of threaded rod, backup pad and backing roll, the top of bottom plate is provided with the rectangular channel, still include first ball bearing, the turbine structure, the drive shaft, the worm structure, first communicating pipe and second communicating pipe, the top and the bottom of denitrogenation tower are provided with natural gas conveying pipe and nitrogen gas delivery pipe respectively.

Description

Liquefied natural gas mill tank wagon tail gas recovery unit

Technical Field

The utility model relates to a new forms of energy and energy-conserving technical field especially relate to a liquefied natural gas mill tank wagon tail gas recovery unit.

Background

As is well known, lng, the main component of which is methane, is recognized as the cleanest fossil energy source on earth. The liquefied natural gas is colorless, tasteless, nontoxic and noncorrosive, the volume of the liquefied natural gas is about 1/625 of the volume of the same amount of gaseous natural gas, and the mass of the liquefied natural gas is only about 45 percent of the water with the same volume; when liquefied natural gas is carried in the tank wagon, along with the atmospheric pressure reduction in the gas storage tank, often can persist the unable discharge of some tail gas, increase manufacturing cost, lead to the use reliability lower.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a to prior art not enough, the utility model provides a convenient tail gas to in the gas holder is retrieved, and reduction in production cost improves the liquefied natural gas mill tank wagon tail gas recovery unit who uses the reliability.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a tank car tail gas recovery device of a liquefied natural gas factory comprises a tank car, a gas storage tank, a cache tank, a denitrification tower and a nitrogen pressurization tank, wherein the gas storage tank is arranged on the tank car, the left side and the right side of the bottom end of the gas storage tank are respectively provided with a left support and a right support, the bottom end of the right support is rotatably connected with the right side of the top end of the tank car, the bottom end of the left support is provided with a lifting device, the lifting device comprises a bottom plate, a motor, a speed reducer, two groups of threaded pipes, two groups of threaded rods, a support plate and a support roller, the bottom plate is fixedly arranged on the left side of the top end of the tank car, the top end of the bottom plate is provided with a rectangular groove, the front end and the rear end of the bottom wall in the rectangular groove are respectively provided with a mounting groove, the first ball bearings are respectively fixedly arranged in the two groups of mounting, the top ends of the two groups of threaded rods are respectively connected with the left side and the right side of the bottom end of the supporting plate, the bottom ends of the two groups of threaded rods are respectively inserted into and screwed into the top ends of the two groups of threaded pipes, the motor and the speed reducer are both arranged in the rectangular groove, the speed reducer is positioned at the output end of the motor, the output end of the speed reducer is provided with a driving shaft, the driving shaft is arranged in the rectangular groove along the front-back direction, two groups of worm structures respectively matched with the two groups of turbine structures are arranged on the driving shaft, the supporting roller is rotatably arranged at the top end of the supporting plate, the top end of the supporting roller is tightly attached to the bottom end of the left support, the output end of the nitrogen pressurizing tank is communicated with the gas storage tank, the bottom of the right end of the gas storage tank is provided with a, the top and the bottom of the denitrification tower are respectively provided with a natural gas conveying pipe and a nitrogen gas discharge pipe, and switch valves are arranged at the natural gas conveying pipe and the nitrogen gas discharge pipe.

Preferably, a front placing groove and a rear placing groove are respectively arranged on the front side wall and the rear side wall of the rectangular groove, a front ball bearing and a rear ball bearing are respectively arranged in the front placing groove and the rear placing groove, and the front end and the rear end of the driving shaft are respectively inserted into the front ball bearing and the rear ball bearing.

Preferably, the rectangular groove structure further comprises four groups of guide pillars and four groups of guide sleeves, the bottom ends of the four groups of guide sleeves are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom wall in the rectangular groove, the top ends of the four groups of guide pillars are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the supporting plate, and the bottom ends of the four groups of guide pillars are respectively inserted into the top ends of the four groups of guide sleeves.

Preferably, the bottom of left support is provided with the adjustment tank, the top of backing roll pastes tightly with the interior roof of adjustment tank.

Preferably, the first communicating pipe and the second communicating pipe are both provided with regulating valves.

Preferably, a cushion layer is arranged at the top end of the bottom plate.

(III) advantageous effects

Compared with the prior art, the utility model provides a tank wagon tail gas recovery unit of liquefied natural gas mill possesses following beneficial effect: drive the drive shaft through the motor and rotate, the drive shaft drives the worm structure and rotates, cooperation through worm structure and turbine structure, it rotates to drive two sets of screwed pipes, cooperation through screwed pipe and threaded rod, drive the backup pad rebound, drive the backing roll through the backup pad and jack-up the left socle, thereby with the certain angle of gas holder slope, let in nitrogen gas in the gas holder through the nitrogen gas pressurized tank and keep the pressure in the gas holder, liquefied gas in the gas holder is through leading-in buffer memory jar of first communicating pipe, liquefied gas in the buffer memory jar gets into the denitrogenation tower through the second conveyer pipe and carries out the denitrogenation, the nitrogen gas that drops is discharged from the nitrogen gas delivery pipe of bottom, natural gas vaporization is and is carried for natural gas pressurization strorage device through the natural gas conveyer pipe, the tail gas in the gas holder is.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a left side view schematic diagram of the connection between the left support and the bottom plate of the present invention;

FIG. 3 is a schematic top view of the rectangular groove of the bottom plate of the present invention;

in the drawings, the reference numbers: 1. tank car; 2. a gas storage tank; 3. a buffer tank; 4. a denitrification tower; 5. a nitrogen pressurization tank; 6. a left support; 7. a right support; 8. a base plate; 9. a motor; 10. a speed reducer; 11. a threaded pipe; 12. a threaded rod; 13. a support plate; 14. a support roller; 15. a rectangular groove; 16. a first ball bearing; 17. a turbine structure; 18. a drive shaft; 19. a worm structure; 20. a first communication pipe; 21. a second communicating pipe; 22. a natural gas delivery pipe; 23. a nitrogen gas discharge pipe; 24. an on-off valve; 25. a front ball bearing; 26. a rear ball bearing; 27. a guide post; 28. a guide sleeve; 29. an adjustment groove; 30. adjusting a valve; 31. a cushion layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the utility model relates to a tank car tail gas recovery device for a liquefied natural gas factory, which comprises a tank car 1, a gas storage tank 2, a buffer tank 3, a denitrification tower 4 and a nitrogen pressurization tank 5, wherein the gas storage tank 2 is installed on the tank car 1, the left side and the right side of the bottom end of the gas storage tank 2 are respectively provided with a left support 6 and a right support 7, the bottom end of the right support 7 is rotatably connected with the right side of the top end of the tank car 1, the bottom end of the left support 6 is provided with a lifting device, the lifting device comprises a bottom plate 8, a motor 9, a speed reducer 10, two groups of threaded pipes 11, two groups of threaded rods 12, a support plate 13 and a support roller 14, the bottom plate 8 is fixedly installed on the left side of the top end of the tank car 1, a rectangular groove 15 is arranged on the top end of the bottom plate 8, both the front end and the rear, the bottom ends of the two groups of threaded pipes 11 are respectively inserted into the two groups of first ball bearings 16, turbine structures 17 are arranged on the outer sides of the two groups of threaded pipes 11, the top ends of the two groups of threaded rods 12 are respectively connected with the left side and the right side of the bottom end of the supporting plate 13, the bottom ends of the two groups of threaded rods 12 are respectively inserted into and screwed into the top ends of the two groups of threaded pipes 11, the motor 9 and the speed reducer 10 are both installed in a rectangular groove 15, the speed reducer 10 is positioned at the output end of the motor 9, a driving shaft 18 is arranged at the output end of the speed reducer 10, the driving shaft 18 is arranged in the rectangular groove 15 in the front-back direction, two groups of worm structures 19 respectively matched with the two groups of turbine structures 17 are arranged on the driving shaft 18, the supporting roller 14 is rotatably installed at the top end of the supporting plate 13, the top end of the supporting roller 14 is, a first communicating pipe 20 is arranged at the bottom of the right end of the gas storage tank 2, the output end of the first communicating pipe 20 is communicated with the cache tank 3, a second communicating pipe 21 communicated with the denitrification tower 4 is arranged at the right end of the cache tank 3, a natural gas conveying pipe 22 and a nitrogen gas discharge pipe 23 are respectively arranged at the top and the bottom of the denitrification tower 4, and switch valves 24 are respectively arranged at the natural gas conveying pipe 22 and the nitrogen gas discharge pipe 23; the driving shaft 18 is driven to rotate by the motor 9, the driving shaft 18 drives the worm structure 19 to rotate, the worm structure 19 is matched with the turbine structure 17 to drive the two groups of threaded pipes 11 to rotate, the supporting plate 13 is driven to move upwards by the matching of the threaded pipes 11 and the threaded rods 12, the supporting roller 14 is driven by the supporting plate 13 to jack the left support 6, so that the gas storage tank 2 is inclined by a certain angle, nitrogen is introduced into the gas storage tank 2 through the nitrogen pressurization tank 5 to keep the pressure in the gas storage tank 2, liquefied gas in the gas storage tank 2 is introduced into the cache tank 3 through the first communication pipe 20, liquefied gas in the cache tank 3 enters the denitrification tower 4 through the second communication pipe to be denitrified, the desorbed nitrogen is discharged from the nitrogen discharge pipe 23 at the bottom, natural gas is vaporized and is conveyed to the natural gas pressurization storage device through the natural gas communication pipe 22, and, the production cost is reduced, and the use reliability is improved.

The utility model discloses a liquefied natural gas factory tank wagon tail gas recovery unit, be provided with preceding standing groove and back standing groove respectively on the preceding lateral wall of rectangular channel 15 and the back lateral wall, and install preceding ball bearing 25 and back ball bearing 26 respectively in preceding standing groove and back standing groove, the front end and the rear end of drive shaft 18 insert respectively to preceding ball bearing 25 and the inside of back ball bearing 26; the stability of the drive shaft 18 is ensured by a front ball bearing 25 and a rear ball bearing 26.

The utility model discloses a liquefied natural gas factory tank wagon tail gas recovery unit still includes four groups of guide pillars 27 and four groups of guide pin bushings 28, the bottom of four groups of guide pin bushings 28 is connected with the left front side, right front side, left rear side and the right rear side of the interior diapire of rectangular channel 15 respectively, the top of four groups of guide pillars 27 is connected with the left front side, right front side, left rear side and the right rear side of backup pad 13 bottom respectively, the bottom of four groups of guide pillars 27 inserts respectively to the inside top of four groups of guide pin bushings 28; the stability of the support plate 13 is improved by the cooperation of the four groups of guide posts 27 and the four groups of guide sleeves 28.

The utility model discloses a liquefied natural gas factory tank wagon tail gas recovery unit, the bottom of left support 6 is provided with adjustment tank 29, the top of backing roll 14 pastes closely with the interior roof of adjustment tank 29; the supporting roller 14 slides in the adjusting groove 29 in the lifting process, so that the supporting roller 14 can be limited, and the safety is improved.

The utility model discloses a liquefied natural gas factory tank wagon tail gas recovery unit, the first communicating pipe 20 and the second communicating pipe 21 are both provided with the regulating valve 30; the feed amounts of the first communication pipe 20 and the second communication pipe 21 can be adjusted by the adjusting valve 30.

The utility model discloses a liquefied natural gas factory tank wagon tail gas recovery unit, the top of bottom plate 8 is provided with buffer layer 31; the left support 6 is supported by the cushion 31 on the bottom plate 8 at ordinary times.

When the device is used, the driving shaft 18 is driven to rotate by the motor 9, the driving shaft 18 drives the worm structure 19 to rotate, the worm structure 19 is matched with the turbine structure 17 to drive the two groups of threaded pipes 11 to rotate, the supporting plate 13 is driven to move upwards by the matching of the threaded pipes 11 and the threaded rods 12, the supporting roller 14 is driven by the supporting plate 13 to jack the left support 6, so that the gas storage tank 2 is inclined for a certain angle, nitrogen is introduced into the gas storage tank 2 through the nitrogen pressurization tank 5 to keep the pressure in the gas storage tank 2, liquefied gas in the gas storage tank 2 is introduced into the buffer tank 3 through the first communication pipe 20, the liquefied gas in the buffer tank 3 enters the denitrification tower 4 through the second communication pipe to be denitrified, the desorbed nitrogen is discharged from the nitrogen discharge pipe 23 at the bottom, natural gas is vaporized and is conveyed to the natural gas pressurization storage device through the natural gas communication pipe, the production cost is reduced, the use reliability is improved, the stability of the driving shaft 18 is ensured through the front ball bearing 25 and the rear ball bearing 26, the stability of the supporting plate 13 is improved through the cooperation of the four groups of guide posts 27 and the four groups of guide sleeves 28, the supporting roller 14 slides in the adjusting groove 29 in the lifting process, the supporting roller 14 can be limited, the safety is improved, and the conveying capacity of the first communicating pipe 20 and the conveying capacity of the second communicating pipe 21 can be adjusted through the adjusting valve 30.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims

1. The tank car tail gas recovery device of the liquefied natural gas factory is characterized by comprising a tank car (1), a gas storage tank (2), a buffer tank (3), a denitrification tower (4) and a nitrogen pressurization tank (5), wherein the gas storage tank (2) is installed on the tank car (1), the left side and the right side of the bottom end of the gas storage tank (2) are respectively provided with a left support (6) and a right support (7), the bottom end of the right support (7) is rotatably connected with the right side of the top end of the tank car (1), the bottom end of the left support (6) is provided with a lifting device, the lifting device comprises a bottom plate (8), a motor (9), a speed reducer (10), two groups of threaded pipes (11), two groups of threaded rods (12), a support plate (13) and a support roller (14), the bottom plate (8) is fixedly installed on the left side of the top end of the tank car (1), and a rectangular groove, the front end and the rear end of the bottom wall in the rectangular groove (15) are respectively provided with a mounting groove, a first ball bearing (16) is fixedly mounted in each of two groups of mounting grooves, the bottom ends of two groups of threaded pipes (11) are respectively inserted into the two groups of first ball bearings (16), turbine structures (17) are respectively arranged on the outer sides of the two groups of threaded pipes (11), the top ends of two groups of threaded rods (12) are respectively connected with the left side and the right side of the bottom end of the supporting plate (13), the bottom ends of two groups of threaded rods (12) are respectively inserted into and screwed into the top ends of the two groups of threaded pipes (11), the motor (9) and the speed reducer (10) are both mounted in the rectangular groove (15), the speed reducer (10) is positioned at the output end of the motor (9), a driving shaft (18) is arranged at the output end of the speed reducer (10), and the driving shaft (18) is arranged in the, two groups of worm structures (19) which are respectively matched with the two groups of worm wheel structures (17) are arranged on the driving shaft (18), the supporting roller (14) can be rotatably arranged at the top end of the supporting plate (13), the top end of the supporting roller (14) is tightly attached to the bottom end of the left support (6), the output end of the nitrogen pressurization tank (5) is communicated with the gas storage tank (2), a first communicating pipe (20) is arranged at the bottom of the right end of the gas storage tank (2), the output end of the first communicating pipe (20) is communicated with the cache tank (3), the right end of the cache tank (3) is provided with a second communicating pipe (21) communicated with the denitrification tower (4), the top and the bottom of the denitrification tower (4) are respectively provided with a natural gas conveying pipe (22) and a nitrogen gas discharge pipe (23), and switch valves (24) are arranged at the natural gas conveying pipe (22) and the nitrogen gas discharge pipe (23).

2. The LNG factory tank car tail gas recovery device according to claim 1, wherein the rectangular groove (15) is provided with a front placing groove and a rear placing groove on a front side wall and a rear side wall thereof, and a front ball bearing (25) and a rear ball bearing (26) are mounted in the front placing groove and the rear placing groove, respectively, and a front end and a rear end of the driving shaft (18) are inserted into the front ball bearing (25) and the rear ball bearing (26), respectively.

3. The LNG factory tank car tail gas recovery device according to claim 2, further comprising four sets of guide pillars (27) and four sets of guide sleeves (28), wherein the bottom ends of the four sets of guide sleeves (28) are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom wall in the rectangular groove (15), the top ends of the four sets of guide pillars (27) are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the support plate (13), and the bottom ends of the four sets of guide pillars (27) are respectively inserted into the top ends of the four sets of guide sleeves (28).

4. The LNG factory tank car tail gas recovery device according to claim 3, wherein the bottom end of the left support (6) is provided with an adjusting groove (29), and the top end of the supporting roller (14) is attached to the inner top wall of the adjusting groove (29).

5. The tail gas recovery device for tank cars of liquefied natural gas plants as claimed in claim 4, wherein the first communicating pipe (20) and the second communicating pipe (21) are provided with regulating valves (30).

6. The LNG factory tank car tail gas recovery device according to claim 5, wherein a cushion layer (31) is arranged on the top end of the bottom plate (8).