CN212253284U

CN212253284U - Cold box for natural gas liquefaction

Info

Publication number: CN212253284U
Application number: CN202021085505.XU
Authority: CN
Inventors: 曹庆胜; 王磊; 刘健
Original assignee: Cixian Xinsheng Coal Chemical Co ltd
Current assignee: Cixian Xinsheng Coal Chemical Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2020-12-29
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a cold box that natural gas liquefaction used, including shell and exhaust tube, the inside of shell is provided with thermal-insulated storehouse, and the outer terminal surface in thermal-insulated storehouse is connected through the inner wall side of fixed connecting rod with the shell, the top in thermal-insulated storehouse is connected with the top inner wall of shell through the partition panel, and is provided with thermal-insulated filler between thermal-insulated storehouse outer terminal surface and the shell inner wall, the top of shell is provided with the top cap, and the bottom of top cap is provided with the spliced pole, is provided with the sealing washer between the side of shell and the shell simultaneously, the spliced pole is connected with the top of roof, and the below of roof is provided with the bottom plate, is provided with the heat transfer board between roof and the bottom plate simultaneously, both ends are provided with inlet pipe and discharging pipe. This cold box that natural gas liquefaction used wholly is split type structure, has higher dismouting convenience, and has effectively improved holistic thermal insulation effect through space separation cooperation vacuum structure.

Description

Cold box for natural gas liquefaction

Technical Field

The utility model relates to a natural gas processing technology field specifically is a cold box that natural gas liquefaction used.

Background

The cold box for natural gas liquefaction is important equipment which needs to be used in the working process of a natural gas factory, and mainly has the functions of heat preservation and heat insulation of a heat exchange device and a pipeline, so that the processing efficiency of natural gas is ensured.

And the cold box that uses at present carries out thermal-insulated processing through filling thermal-insulated material between casing and heat transfer device and pipeline usually, and the structure of integral type has improved the processing degree of difficulty when assembling, and the heat transfer efficiency of thermal-insulated material is low, can reduce the heat exchange efficiency of heat exchanger, consequently has inconveniently when using.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cold box that natural gas liquefaction used to solve the cold box of present use that proposes in the above-mentioned background art and carry out thermal-insulated processing through filling the heat-insulating material usually between casing and heat transfer device and pipeline, and the structure of integral type has improved the processing degree of difficulty when assembling, and the heat-insulating material is low in heat transfer efficiency, but the heat-insulating material is direct to contact with the outer wall of casing, still can accelerate heat transfer efficiency, consequently has inconvenient problem when using.

In order to achieve the above object, the utility model provides a following technical scheme: a cold box for natural gas liquefaction comprises a shell and an exhaust pipe, wherein a heat insulation bin is arranged inside the shell, the outer end face of the heat insulation bin is connected with the side face of the inner wall of the shell through a fixed connecting rod, the top end of the heat insulation bin is connected with the inner wall of the top of the shell through a partition plate, heat insulation filler is arranged between the outer end face of the heat insulation bin and the inner wall of the shell, a top cover is arranged at the top of the shell, a connecting column is arranged at the bottom of the top cover, a sealing ring is arranged between the side face of the shell and the shell, the connecting column is connected with the top of a top plate, a bottom plate is arranged below the top plate, a heat exchange plate is arranged between the top plate and the bottom plate, a feeding pipe and a discharging pipe are respectively arranged at the left end and the right end of the top cover, the feeding pipe and the, the spacing groove has all been seted up at both ends about roof, heat transfer board and bottom plate, and both ends all are connected with the gag lever post through the spacing groove about roof, heat transfer board and bottom plate, both ends all are provided with the fixed beam about between roof and the bottom plate, and roof, heat transfer board and bottom plate all set up inside thermal-insulated storehouse, and the inside heat absorption filler that is provided with in thermal-insulated storehouse simultaneously, the exhaust tube sets up in the bottom of shell, and the bottom that the shell bottom was run through to the top of exhaust tube is connected with the bottom in thermal-insulated storehouse, thermal-insulated storehouse inboard is provided with the transfer line, and the top of transfer line runs through both ends around heat transfer board, roof and top cap respectively in proper.

Preferably, the axis of shell and the axis in thermal-insulated storehouse are on same vertical straight line, and thermal-insulated storehouse cooperation partition panel is two isolated spaces each other with the inner space partition of shell.

Preferably, the whole heat insulation bin is of a cylindrical structure, the top of the heat insulation bin is of an opening structure, and meanwhile, a hollow structure is formed between the outer wall and the inner wall of the heat insulation bin.

Preferably, the fixed connecting rods are arranged in 3 groups at equal intervals, and each group of fixed connecting rods is provided with 40 fixed connecting rods at equal angles.

Preferably, the top cover is connected with the shell in a sliding manner, and the central axis of the top cover and the central axis of the shell are on the same vertical straight line.

Preferably, the top plate is the same with the bottom plate size, and is provided with the heat transfer board between top plate and the bottom plate in the matrix, hugs closely the outer wall at inlet pipe and discharging pipe simultaneously of heat transfer board.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a, be provided with shell, thermal-insulated storehouse, fixed connecting rod, partition panel and exhaust tube, thermal-insulated storehouse is the tubular structure of metal material, and thermal-insulated storehouse passes through the partition panel and separates the inner space of shell for the space of two mutual intercommunications, and can take out to the vacuum state in the thermal-insulated storehouse through the exhaust tube, further reduces the heat conduction efficiency between two spaces in the shell, has improved the practicality.

2. The utility model discloses a, be provided with thermal-insulated filler, the heat absorption is packed, the roof, the heat transfer board, the bottom plate, the inlet pipe, discharging pipe and connecting pipe, through the roof, form a complete heat transfer structure through gag lever post and fixed beam combination between heat transfer board and the bottom plate, the heat transfer board through the matrix conducts the heat absorption with the temperature of discharging pipe and connecting pipe and packs, the main material that the heat absorption was packed is carborundum, good heat-conduction effect has, through the heat absorption pack improve with the transfer line between area of contact, and then improve holistic heat exchange efficiency.

3. The utility model discloses a, be provided with top cap, spliced pole and sealing washer, the top cap passes through spliced pole and heat transfer structure interconnect, in the installation, can accomplish holistic installation work fast through vertical hoisting's mode, and is convenient for clear up inside the device in follow-up use, has improved the practicality.

Drawings

Fig. 1 is a schematic front view of the present invention;

fig. 2 is a schematic cross-sectional structure of the present invention;

fig. 3 is an enlarged schematic view of a portion a of fig. 1 according to the present invention;

fig. 4 is an enlarged schematic structural diagram of the point B in fig. 2 according to the present invention.

In the figure: 1. a housing; 2. a heat insulation bin; 3. fixing the connecting rod; 4. a partition panel; 5. a thermally insulating filler; 6. a top cover; 7. connecting columns; 8. a seal ring; 9. a top plate; 10. a heat exchange plate; 11. a base plate; 12. a feed pipe; 13. a discharge pipe; 14. a connecting pipe; 15. a limiting groove; 16. a limiting rod; 17. a fixed beam; 18. a heat absorbing filler; 19. an air exhaust pipe; 20. an infusion tube.

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. 1-4, the present invention provides a technical solution: a cold box for natural gas liquefaction comprises a shell 1 and an exhaust pipe 19, wherein a heat insulation bin 2 is arranged inside the shell 1, the outer end face of the heat insulation bin 2 is connected with the side face of the inner wall of the shell 1 through a fixed connecting rod 3, the top end of the heat insulation bin 2 is connected with the inner wall of the top of the shell 1 through a partition plate 4, heat insulation filler 5 is arranged between the outer end face of the heat insulation bin 2 and the inner wall of the shell 1, a top cover 6 is arranged at the top of the shell 1, a connecting column 7 is arranged at the bottom of the top cover 6, a sealing ring 8 is arranged between the side face of the shell 1 and the shell 1, the connecting column 7 is connected with the top of a top plate 9, a bottom plate 11 is arranged below the top plate 9, a heat exchange plate 10 is arranged between the top plate 9 and the bottom plate 11, a feeding pipe 12 and a discharging pipe 13 are, Roof 9, heat transfer board 10 and bottom plate 11, connecting pipe 14 interconnect is passed through to the bottom of inlet pipe 12 and discharging pipe 13 simultaneously, roof 9, limiting groove 15 has all been seted up at both ends about heat transfer board 10 and bottom plate 11, and roof 9, both ends all are connected with gag lever post 16 through limiting groove 15 about heat transfer board 10 and bottom plate 11, both ends all are provided with fixed beam 17 about between roof 9 and the bottom plate 11, and roof 9, heat transfer board 10 and bottom plate 11 all set up inside thermal-insulated storehouse 2, thermal-insulated storehouse 2 inside is provided with endothermic filler 18 simultaneously, exhaust tube 19 sets up the bottom at shell 1, and the top of exhaust tube 19 runs through shell 1 bottom and is connected with the bottom in thermal-insulated storehouse 2, thermal-insulated storehouse 2 inboard is provided with transfer line 20, and the top of transfer line 20 runs through heat transfer board 10, both ends around roof 9 and top cap 6 respectively in proper order.

The axis in shell 1 and the axis in thermal-insulated storehouse 2 are on same vertical straight line, and thermal-insulated storehouse 2 cooperation partition panel 4 is two isolated spaces each other with the inner space partition of shell 1, is convenient for reduce heat conduction efficiency through the space that two do not communicate each other, improves the result of use.

The whole cylindrical structure that is of thermal-insulated storehouse 2, and the top in thermal-insulated storehouse 2 is open structure, is hollow structure simultaneously between the outer wall in thermal-insulated storehouse 2 and the inner wall, is convenient for take out into vacuum state with the hollow structure between 2 outer walls in thermal-insulated storehouse and the inner wall through exhaust tube 19, further reduces two spaces that do not communicate each other and is convenient for reduce heat conduction efficiency.

Fixed connecting rod 3 is equidistant and is provided with 3 groups, and every fixed connecting rod of group 3 all is the angle such as be provided with 40, improves the holistic fixed effect in thermal-insulated storehouse 2 through fixed connecting rod 3, stability when improving the use.

The connection mode of top cap 6 and shell 1 is sliding connection, and the axis of top cap 6 and the axis of shell 1 on same vertical straight line, has improved the convenience of whole when the dismouting through sliding connection's mode.

The size of the top plate 9 is the same as that of the bottom plate 11, the heat exchange plates 10 are arranged between the top plate 9 and the bottom plate 11 in a matrix mode, meanwhile, the heat exchange plates 10 are tightly attached to the outer walls of the feeding pipe 12 and the discharging pipe 13, and the surfaces of the feeding pipe 12 and the discharging pipe 13 are tightly attached to the heat exchange plates 10 to improve the heat conduction efficiency.

The working principle is as follows: before the cold box for natural gas liquefaction is used, firstly, the whole body formed by the top cover 6, the top plate 9, the heat exchange plate 10, the bottom plate 11, the feeding pipe 12 and the discharging pipe 13 is vertically and downwards placed into the shell 1 in a hoisting mode, then the connection between the shell 1 and the top cover 6 is reinforced through bolts, and finally the feeding pipe 12 and the discharging pipe 13 are respectively connected with an external natural gas pipeline, so that the whole body can be completely assembled, when the cold box is used, firstly, air between the outer wall and the inner wall of the heat insulation bin 2 is pumped out by matching with the air pumping pipe 19, then, the top end of the liquid conveying pipe 20 is respectively connected with the external refrigerant liquid pipeline, when refrigerant liquid flows in the liquid conveying pipe 20, the heat of the heat absorption filler 18 can be transferred to the liquid conveying pipe 20 through the heat exchange plate 10 and is discharged along with the refrigerant liquid flowing in the liquid conveying pipe 20, therefore, the temperature of the heat absorption, then discharge through connecting pipe 14 and discharging pipe 13, in this process, liquefied natural gas's heat can be transmitted to heat transfer board 10 and heat absorption filler 18, and then make the temperature of natural gas reduce fast and then liquefy, and heat absorption filler 18 and heat transfer board 10's heat can transmit the refrigerant liquid that flows in the transfer line 20 fast, accomplish the heat conduction with this, and fill thermal-insulated filler 5 between shell 1 inner wall and the outer terminal surface in thermal-insulated storehouse 2 then effectively prevent that the external temperature from transmitting to thermal-insulated filler 5, and the vacuum structure greatly reduced heat-conduction efficiency between thermal-insulated storehouse 2 outer wall and the inner wall, and then improved holistic thermal-insulated effect that keeps warm, above just be the course of work of whole device.

The materials of the heat insulating filler 5 and the heat absorbing filler 18 are selected according to actual use conditions, and in one embodiment, the materials of the heat insulating filler 5 are as follows: the perlite and the heat absorption filler 18 are made of the following materials: silicon carbide powder, and those not described in detail in this specification, are within the skill of those in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A cold box for natural gas liquefaction, comprising a shell (1) and an extraction pipe (19), characterized in that: the heat insulation structure is characterized in that a heat insulation bin (2) is arranged inside a shell (1), the outer end face of the heat insulation bin (2) is connected with the side face of the inner wall of the shell (1) through a fixed connecting rod (3), the top end of the heat insulation bin (2) is connected with the inner wall of the top of the shell (1) through a partition plate (4), heat insulation filler (5) is arranged between the outer end face of the heat insulation bin (2) and the inner wall of the shell (1), a top cover (6) is arranged at the top of the shell (1), a connecting column (7) is arranged at the bottom of the top cover (6), a sealing ring (8) is arranged between the side face of the shell (1) and the shell (1), the connecting column (7) is connected with the top of a top plate (9), a bottom plate (11) is arranged below the top plate (9), a heat exchange plate (10) is arranged between the top plate (9) and the bottom plate (11), a feeding pipe (12, and the feeding pipe (12) and the discharging pipe (13) respectively penetrate through the top cover (6), the top plate (9), the heat exchange plate (10) and the bottom plate (11) in sequence, meanwhile, the bottoms of the feeding pipe (12) and the discharging pipe (13) are mutually connected through a connecting pipe (14), the left and right ends of the top plate (9), the heat exchange plate (10) and the bottom plate (11) are respectively provided with a limiting groove (15), the left and right ends of the top plate (9), the heat exchange plate (10) and the bottom plate (11) are respectively connected with a limiting rod (16) through the limiting groove (15), the left and right ends between the top plate (9) and the bottom plate (11) are respectively provided with a fixed beam (17), the top plate (9), the heat exchange plate (10) and the bottom plate (11) are respectively arranged inside the heat insulation bin (2), meanwhile, the heat absorption filler (18) is arranged inside the heat insulation bin (2), and the air, and the top end of the exhaust tube (19) penetrates through the bottom of the shell (1) and is connected with the bottom of the heat insulation bin (2), a transfusion tube (20) is arranged on the inner side of the heat insulation bin (2), and the top end of the transfusion tube (20) penetrates through the front end and the rear end of the heat exchange plate (10), the top plate (9) and the top cover (6) in sequence respectively.

2. A cold box for natural gas liquefaction according to claim 1, wherein: the axis of shell (1) is on same vertical straight line with the axis in thermal-insulated storehouse (2), and thermal-insulated storehouse (2) cooperation partition panel (4) is two isolated spaces each other with the inner space partition of shell (1).

3. A cold box for natural gas liquefaction according to claim 1, wherein: the whole heat insulation bin (2) is of a cylindrical structure, the top of the heat insulation bin (2) is of an open structure, and meanwhile, a hollow structure is formed between the outer wall and the inner wall of the heat insulation bin (2).

4. A cold box for natural gas liquefaction according to claim 1, wherein: the fixed connecting rods (3) are arranged in 3 groups at equal intervals, and each group of fixed connecting rods (3) is arranged in 40 groups at equal angles.

5. A cold box for natural gas liquefaction according to claim 1, wherein: the connection mode of top cap (6) and shell (1) is sliding connection, and the axis of top cap (6) and the axis of shell (1) are on same vertical straight line.

6. A cold box for natural gas liquefaction according to claim 1, wherein: roof (9) and bottom plate (11) size the same, and be provided with heat transfer board (10) between roof (9) and bottom plate (11) the matrix, hug closely the outer wall at inlet pipe (12) and discharging pipe (13) simultaneously heat transfer board (10).