Reliquefaction device of low-temperature liquid expansion machine

Abstract

The utility model relates to the technical field of gas compression, and discloses a reliquefaction device of a low-temperature liquid expansion machine. The reliquefaction device of the low-temperature liquid expansion machine comprises a compressor, an air inlet pipe is fixed to the rear end of the compressor, a connecting pipe is fixedly installed at the front end of the compressor, a cooling tower is fixedly installed at the front end of the connecting pipe, and the portion, located on the inner side of a circulating pipe, of the surface of an inner baffle is provided with an annularly-distributed open pore structure. The part, located on the outer side of the circulating pipe, of the surface of the outer baffle is provided with an open pore structure which is annularly distributed with the center of the circulating pipe as the reference, and the inner baffle and the outer baffle are vertically and alternately arranged and installed in the cooling tower. And the gas can only move upwards through the opening in the inner side of the inner baffle and the opening in the outer side of the outer baffle, so that the gas can be in contact with the circulating pipe, the movement direction of the gas can be limited, the heat release time of the gas is prolonged, and the gas cooling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas compression, in particular to a low-temperature liquid expander reliquefaction device. Background Art

[0002] Gas liquefaction equipment typically includes a compressor, purifier, storage tank, infusion system, automatic control system, and gas storage system. The liquefied gas is compressed by the compressor and expanded by the expander to cool it (or pre-cooled by an external cooling source). The purifier removes water vapor and other impurities with high condensation temperatures to prevent them from solidifying at low temperatures and clogging pipes and valves.

[0003] An existing Chinese utility model patent with reference number CN206094744U discloses a gas liquefaction device comprising a liquid container and a refrigerator. The bottom of the liquid container is a liquid space, and the top is a gas space. The refrigerator includes an evaporator disposed within the liquid container, a regenerator connected to the evaporator, a condenser connected to the regenerator, and a compressor connected to the condenser. The compressor is also connected to the regenerator. The compressor and condenser are disposed outside the liquid container and form a circulation loop with the evaporator and regenerator. The gas liquefaction device is compact, simple in structure, and easy to use, meeting the needs of various applications.

[0004] Due to the influence of compression ratio, existing gas liquefaction equipment needs to compress the gas first and then pass the compressed gas into the cooling structure. Due to the influence of heat exchange efficiency, the existing cooling device can only complete the conversion of part of the gas, which is very inconvenient when collecting subsequent liquefied gas. At the same time, the existing cooling device generally introduces a circulating coolant through an inner tube to absorb the heat of the gas and liquefy the gas. However, the existing cooling device cannot limit the flow direction of the gas. The gas flow direction in the cooling structure is single, and the heat exchange efficiency is low. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the existing technology, the utility model provides a low-temperature liquid expander reliquefaction device, which has the advantages of being able to achieve gas-liquid separation and improve the heat dissipation efficiency of the equipment, thereby solving the above technical problems.

[0007] (2) Technical solution

[0008] To achieve the above object, the utility model provides the following technical scheme: a low temperature liquid expander reliquefaction device, include: compressor, the rear end fixed air inlet pipe of compressor, the front end fixed installation has the connecting pipe of compressor, the front end fixed installation has the cooling tower of connecting pipe, the lower end fixed installation has the liquid outlet of cooling tower, the inside fixed installation has the circulating pipe of cooling tower, the inside fixed installation has the inner baffle and outer baffle of cooling tower, the top end fixed installation has the elbow pipe of cooling tower, the front end fixed installation has the liquid accumulation pipe of elbow pipe, the inside fixed installation has the flow guide plate of liquid accumulation pipe, the lower end fixed installation has the check valve of flow guide plate, the lower end fixed installation has the liquid discharge pipe of check valve, the air inlet pipe can be convenient for gas to enter compressor.

[0009] As the preferred technical scheme of the utility model, the compressor is communicated with the cooling tower through the connecting pipe, and the upper and lower ends of the cooling tower are conical structures; the compressor can compress gas.

[0010] As the preferred technical scheme of the utility model, the liquid outlet is installed at the center of the bottom end of the cooling tower, and the liquid outlet is vertically communicated with the inner cavity of the cooling tower; the liquid outlet can facilitate liquid discharge.

[0011] As the preferred technical scheme of the utility model, the circulating pipe is double helix structure, the top end of the double helix is connected, the bottom end vertically extends and penetrates the bottom end of the cooling tower, and the part of the inner baffle surface located inside the circulating pipe is provided with annular distribution opening structure; the circulating pipe can facilitate circulating cooling medium.

[0012] As the preferred technical scheme of the utility model, the part of the outer baffle surface located outside the circulating pipe is provided with annular distribution opening structure with the center of the circulating pipe as the reference, and the inner baffle and the outer baffle are vertically and alternately arranged and installed in the inner cavity of the cooling tower; the inner baffle and the outer baffle can facilitate to limit the gas flow direction.

[0013] As the preferred technical scheme of the utility model, the liquid accumulation pipe is communicated with the cooling tower through the elbow pipe, the liquid accumulation pipe is "T" shaped tee structure, the branch of the liquid accumulation pipe is horizontally left, and the bottom end of the liquid accumulation pipe is conical structure; the elbow pipe can facilitate the connection of the cooling tower and the liquid accumulation pipe.

[0014] As the preferred technical scheme of the utility model, the flow guide plate is inclinedly installed on the upper and lower sides of the vertical structure above the branch of the liquid accumulation pipe at an angle of forty-five degrees, and the flow guide plates on the upper and lower sides of the liquid accumulation pipe are mirror imaged and stacked in up-down staggered manner; the liquid accumulation pipe can facilitate to collect the liquid carried out by the gas.

[0015] Compared with the prior art, the utility model provides a low temperature liquid expander reliquefaction device, which has the following beneficial effects:

[0016] 1. The utility model is provided with an inner baffle and an outer baffle. The portion of the surface of the inner baffle located on the inner side of the circulation pipe is provided with an annularly distributed opening structure. The portion of the surface of the outer baffle located on the outer side of the circulation pipe is provided with an annularly distributed opening structure based on the center of the circulation pipe. The inner baffles and the outer baffles are vertically alternately arranged and installed inside the cooling tower. After the compressed gas enters the interior of the cooling tower, it can only move upward through the openings on the inner side of the inner baffle and the openings on the outer side of the outer baffle to facilitate contact between the gas and the circulation pipe. This method can limit the movement direction of the gas, thereby increasing the time for the gas to release heat and improving the gas cooling efficiency.

[0017] 2. The utility model is provided with a liquid accumulation pipe, which is connected to the cooling tower through a bend pipe. The liquid accumulation pipe is in a "T"-shaped three-way structure. The branch of the liquid accumulation pipe is horizontally to the left, and the bottom end of the liquid accumulation pipe is a conical structure. The guide plate is installed at a forty-five-degree angle on the upper and lower sides of the vertical structure above the branch of the liquid accumulation pipe. The guide plates on the upper and lower sides of the liquid accumulation pipe are mirror-imaged and staggered up and down. A gap is left between the upper end of the guide plate and the inner wall of the liquid accumulation pipe. After the gas enters the liquid accumulation pipe, it will move upward from the gap between the top of the guide plate and the liquid accumulation pipe under the restriction of the guide plate. When the gas contacts the guide plate, the droplets entrained by the gas will adhere to the surface of the guide plate and converge on the surface of the guide plate, and finally enter the interior of the drain pipe through the check valve. This method can collect the liquid brought out by the gas. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 This is a schematic diagram of the structure of the utility model;

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

[0021] Figure 4 This is a schematic diagram of the structure of the utility model;

[0022] Among them: 1. Compressor; 11. Air inlet pipe; 12. Connecting pipe; 13. Cooling tower; 14. Drain port; 15. Circulation pipe; 16. Inner baffle; 17. Outer baffle; 18. Elbow pipe; 19. Liquid accumulation pipe; 110. Guide plate; 111. Check valve; 112. Drain pipe. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] See also Figure 1 - Figure 4 In this embodiment, a cryogenic liquid expander reliquefaction device includes: a compressor 1, an air inlet pipe 11 is fixed to the rear end of the compressor 1, a connecting pipe 12 is fixedly installed at the front end of the compressor 1, a cooling tower 13 is fixedly installed at the front end of the connecting pipe 12, a drain port 14 is fixedly installed at the lower end of the cooling tower 13, a circulation pipe 15 is fixedly installed inside the cooling tower 13, an inner baffle 16 and an outer baffle 17 are fixedly installed inside the cooling tower 13, a bent pipe 18 is fixedly installed at the top of the cooling tower 13, a liquid accumulation pipe 19 is fixedly installed at the front end of the bent pipe 18, a guide plate 110 is fixedly installed inside the liquid accumulation pipe 19, a check valve 111 is fixedly installed at the lower end of the guide plate 110, and a drain pipe 112 is fixedly installed at the lower end of the check valve 111.

[0027] The compressor 1 is connected to the cooling tower 13 through the connecting pipe 12. The upper and lower ends of the cooling tower 13 are conical structures. The drain port 14 is installed in the center of the bottom end of the cooling tower 13. The drain port 14 vertically penetrates the cooling tower 13 and is connected to the inner cavity of the cooling tower 13. The circulation pipe 15 is a double helix structure. The top of the double helix is ​​connected and the bottom extends vertically downward to penetrate the bottom end of the cooling tower 13. The surface of the inner baffle 16 located on the inner side of the circulation pipe 15 is provided with an annularly distributed opening structure. The surface of the outer baffle 17 located on the outer side of the circulation pipe 15 is provided with an annularly distributed opening structure. There is an open hole structure distributed in a ring shape with the center of the circulation pipe 15 as the reference. The inner baffle 16 and the outer baffle 17 are vertically arranged alternately and installed inside the cooling tower 13. The liquid accumulation pipe 19 is connected to the cooling tower 13 through the elbow 18. The liquid accumulation pipe 19 is a "T"-shaped three-way structure. The branch of the liquid accumulation pipe 19 is horizontal to the left. The bottom end of the liquid accumulation pipe 19 is a conical structure. The guide plate 110 is installed at an angle of forty-five degrees on the upper and lower sides of the vertical structure above the branch of the liquid accumulation pipe 19. The guide plates 110 on the upper and lower sides of the liquid accumulation pipe 19 are mirror-imaged and staggered up and down.

[0028] Specifically, the compressor 1 can compress gas, the air inlet pipe 11 can facilitate the gas to enter the compressor 1, the connecting pipe 12 can facilitate the compressed gas to enter the interior of the cooling tower 13, the cooling tower 13 can facilitate the cooling and liquefaction of the compressed gas, the drain port 14 can facilitate the discharge of liquid, the circulation pipe 15 can facilitate the circulation of cooling medium, the inner baffle 16 and the outer baffle 17 can facilitate the restriction of the gas flow direction, the elbow 18 can facilitate the connection between the cooling tower 13 and the liquid accumulation pipe 19, the liquid accumulation pipe 19 can facilitate the collection of liquid brought out by the gas, the guide plate 110 can facilitate the capture of liquid in the airflow, the check valve 111 can prevent liquid reflux, and the drain pipe 112 can facilitate the discharge of liquid.

[0029] When in use, the portion of the surface of the inner baffle 16 located on the inner side of the circulation pipe 15 is provided with an annularly distributed opening structure, and the portion of the surface of the outer baffle 17 located on the outer side of the circulation pipe 15 is provided with an annularly distributed opening structure based on the center of the circulation pipe 15. The inner baffles 16 and the outer baffles 17 are vertically alternately arranged and installed inside the cooling tower 13. After the compressed gas enters the interior of the cooling tower 13, it can only move upward through the openings on the inner side of the inner baffle 16 and the openings on the outer side of the outer baffle 17, so that the gas contacts the circulation pipe 15. This method can limit the movement direction of the gas to increase the time for the gas to release heat and improve the gas cooling efficiency. The liquid accumulation pipe 19 is connected to the cooling tower 13 through the elbow 18. The liquid accumulation pipe 19 has a "T"-shaped three-way structure. The branch of the liquid pipe 19 is horizontal to the left, and the bottom end of the liquid collection pipe 19 is a conical structure. The guide plate 110 is installed at a forty-five-degree angle on the upper and lower sides of the vertical structure above the branch of the liquid collection pipe 19. The guide plates 110 on the upper and lower sides of the liquid collection pipe 19 are mirror-imaged and staggered up and down. There is a gap between the upper end of the guide plate 110 and the inner wall of the liquid collection pipe 19. After the gas enters the liquid collection pipe 19, it will move upward from the gap between the top of the guide plate 110 and the liquid collection pipe 19 under the restriction of the guide plate 110. When the gas contacts the guide plate 110, the droplets entrained by the gas will adhere to the surface of the guide plate 110 and converge on the surface of the guide plate 110, and finally enter the interior of the drain pipe 112 through the check valve 111. This method can collect the liquid brought out by the gas.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cryogenic liquid expander reliquefaction device, characterized in that: include: A compressor (1) is provided, wherein an air intake pipe (11) is fixed to the rear end of the compressor (1), a connecting pipe (12) is fixedly installed to the front end of the compressor (1), a cooling tower (13) is fixedly installed to the front end of the connecting pipe (12), a liquid discharge port (14) is fixedly installed to the lower end of the cooling tower (13), a circulation pipe (15) is fixedly installed inside the cooling tower (13), an inner baffle (16) and an outer baffle (17) are fixedly installed inside the cooling tower (13), a bent pipe (18) is fixedly installed to the top end of the cooling tower (13), a liquid accumulation pipe (19) is fixedly installed to the front end of the bent pipe (18), a guide plate (110) is fixedly installed inside the liquid accumulation pipe (19), a check valve (111) is fixedly installed to the lower end of the guide plate (110), and a liquid discharge pipe (112) is fixedly installed to the lower end of the check valve (111).

2. The cryogenic liquid expander reliquefaction device according to claim 1, characterized in that: The compressor (1) is connected to a cooling tower (13) via a connecting pipe (12), and the upper and lower ends of the cooling tower (13) are conical structures.

3. The cryogenic liquid expander reliquefaction device according to claim 1, characterized in that: The drain port (14) is installed through the center of the bottom end of the cooling tower (13), and the drain port (14) vertically penetrates the cooling tower (13) and communicates with the inner cavity of the cooling tower (13).

4. The cryogenic liquid expander reliquefaction device according to claim 1, characterized in that: The circulation pipe (15) has a double helix structure, the top ends of the double helix are connected, and the bottom ends extend vertically downward to penetrate the bottom end of the cooling tower (13). The surface of the inner baffle (16) located inside the circulation pipe (15) is provided with an annularly distributed open hole structure.

5. The cryogenic liquid expander reliquefaction device according to claim 1, characterized in that: The portion of the surface of the outer baffle (17) located outside the circulation pipe (15) is provided with an opening structure distributed in a ring shape with the center of the circulation pipe (15) as a reference, and the inner baffle (16) and the outer baffle (17) are vertically arranged alternately and installed inside the cooling tower (13).

6. The cryogenic liquid expander reliquefaction device according to claim 1, characterized in that: The liquid accumulation pipe (19) is connected to the cooling tower (13) through a bend pipe (18). The liquid accumulation pipe (19) is a "T"-shaped three-way structure. The branch of the liquid accumulation pipe (19) is horizontally directed to the left, and the bottom end of the liquid accumulation pipe (19) is a tapered structure.

7. The cryogenic liquid expander reliquefaction device according to claim 1, characterized in that: The guide plates (110) are installed at an angle of 45 degrees on the upper and lower sides of the vertical structure above the branch of the liquid collection pipe (19), and the guide plates (110) on the upper and lower sides of the liquid collection pipe (19) are mirror-imaged and staggered.

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