LNG gasification recompression device

Abstract

The utility model provides a LNG gasification re-compression device, including base, the top of base fixed mounting has gasification tank, buffer separation jar and compressor mounting frame, buffer separation jar sets up between gasification tank and compressor mounting frame, buffer separation jar bottom side to gasification tank with its top side to compressor mounting frame all fixed mounting has the conveying pipe, be provided with separation subassembly in buffer separation jar, the upper and lower sides of gasification tank inner wall all fixed mounting has fixed bin, and at least three gasification pipe sections are provided between two fixed bin, form spiral rising channel through the helical flow guide plate in buffer separation jar, can utilize centrifugal force and gravity and separate liquid substance in natural gas fully, collect the cylinder and the effusion discharge pipe and timely discharge effusion, reduce liquid substance to enter the compressor, solved the problem that the compressor cylinder pressure sudden rise of incompressibility of liquid substance caused, reduced the risk of compressor damage.

Description

Technical Field

[0001] This utility model relates to the technical field of LNG processing equipment, specifically to an LNG vaporization and recompression device. Background Technology

[0002] LNG (liquefied natural gas) has advantages such as small volume and convenient transportation, and has been widely used in the energy field. In the process of using LNG, it needs to be gasified first to convert liquid LNG into gaseous natural gas, and then compressed according to actual needs to meet different transportation and usage pressure requirements. The natural gas produced after LNG gasification may carry a small amount of liquid substances. The incompressibility of liquid substances can cause a sudden and sharp increase in pressure in the compressor cylinder, which can easily damage the compressor. In addition, the structure of the gasification unit is fixed and is mostly an integral design. When a blockage, corrosion or fin damage occurs in a certain part, the entire gasification unit needs to be disassembled from the system for repair or replacement. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide an LNG vaporization and recompression device to solve the problems mentioned in the background. This invention features a novel structure. By forming a spiral upward channel through a spiral guide plate inside the buffer separation tank, it can fully separate liquid substances from natural gas using centrifugal force and gravity. The collection cylinder and liquid discharge pipe promptly discharge accumulated liquid, reducing the amount of liquid substances entering the compressor. This effectively solves the problem of sudden pressure rise in the compressor cylinder caused by the incompressibility of liquid substances, reduces the risk of compressor damage, and extends the service life of the equipment.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an LNG vaporization and recompression device, comprising a base, on which a vaporization tank, a buffer separation tank, and a compressor mounting bracket are fixedly installed. The buffer separation tank is disposed between the vaporization tank and the compressor mounting bracket. Conveying pipes are fixedly installed on both the bottom side of the buffer separation tank facing the vaporization tank and the top side of the buffer separation tank facing the compressor mounting bracket. A separation component is disposed inside the buffer separation tank. Fixed chambers are fixedly installed on both the upper and lower sides of the inner wall of the vaporization tank. At least three vaporization pipe sections are disposed between the upper and lower fixed chambers.

[0005] Furthermore, the separation assembly includes a spiral guide plate fixedly installed on the inner wall of the buffer separation tank, and a collection cylinder is fixedly installed on the bottom wall of the buffer separation tank along its central axis.

[0006] Furthermore, a spiral rising channel is formed between the spiral guide plate and the outer wall of the collecting cylinder and the inner wall of the buffer separation tank, and the spiral rising channel is connected to the conveying pipes on the upper and lower sides.

[0007] Furthermore, the inner wall of the collecting cylinder is provided with multiple through grooves that communicate with the spiral rising channel. The bottom of the buffer separation tank is fixedly connected to a liquid discharge pipe that communicates with the collecting cylinder. A solenoid valve is installed on the liquid discharge pipe. A pressure sensor is installed on the top of the buffer separation tank. The pressure sensor is electrically connected to the solenoid valve.

[0008] Furthermore, the top of the fixed chamber inside the gasification box is fixedly connected to a feed pipe extending to the outside. The feed pipe is connected to the fixed chamber at the top. The fixed chamber at the bottom of the gasification box is connected to the spiral rising channel inside the buffer separation tank through one of the conveying pipes.

[0009] Furthermore, each of the gasification pipe sections is fixedly connected to a fin assembly on its outer wall, and each of the gasification pipe sections is fixedly connected to a connecting flange at both its upper and lower ends.

[0010] Furthermore, each of the gasification pipe sections is connected to the upper and lower fixed chambers via connecting flanges. Control valves are installed at the corresponding connection points between the upper and lower fixed chambers and the gasification pipe sections. Insulation cotton is fixedly installed on the inner wall of the gasification box.

[0011] Furthermore, a primary compressor and a secondary compressor are fixedly installed on the compressor mounting bracket. The outlet of the buffer separator is connected to the inlet of the primary compressor through another conveying pipe. A connecting pipe is fixedly connected between the outlet of the primary compressor and the inlet of the secondary compressor. A discharge pipe is fixedly connected to the outlet of the secondary compressor.

[0012] The beneficial effects of this utility model are:

[0013] 1. The LNG vaporization and recompression unit forms a spiral upward channel through the spiral guide plate in the buffer separation tank, which can fully separate liquid substances in natural gas by using centrifugal force and gravity. The collection cylinder and liquid discharge pipe discharge the liquid in time, reducing the amount of liquid substances entering the compressor. This effectively solves the problem of sudden pressure rise in the compressor cylinder caused by the incompressibility of liquid substances, reduces the risk of compressor damage, and extends the service life of the equipment.

[0014] 2. The gasification unit of this LNG gasification and recompression device uses multiple independent gasification pipe sections, which are connected to the fixed chamber through connecting flanges. With the help of control valves, a certain pipe section can be shut down individually. When faults such as blockage, corrosion or fin damage occur, it is not necessary to disassemble the entire gasification unit. Only the faulty pipe section needs to be disassembled and replaced, which reduces downtime and maintenance costs and improves the system's operation and maintenance efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an LNG vaporization and recompression device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the vaporization box and buffer separation tank of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection between the vaporization box and the vaporization pipe section of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the separation component of this utility model;

[0019] Figure 5 This is a schematic diagram of the compressor mounting bracket of this utility model.

[0020] In the diagram: 1. Base; 2. Vaporization box; 3. Buffer separator; 4. Compressor mounting bracket; 5. Conveying pipe; 6. Separation assembly; 601. Spiral guide plate; 602. Spiral rising channel; 603. Collection cylinder; 604. Through groove; 605. Liquid discharge pipe; 606. Solenoid valve; 7. Fixed chamber; 8. Feed pipe; 9. Vaporization pipe section; 10. Fin assembly; 11. Connecting flange; 12. Control valve; 13. Primary compressor; 14. Secondary compressor; 15. Connecting pipe; 16. Discharge pipe; 17. Insulation cotton. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please refer to Figures 1 to 5 This utility model provides a technical solution: an LNG vaporization and recompression device, including a base 1, a vaporization tank 2, a buffer separation tank 3 and a compressor mounting bracket 4 fixedly installed on the top of the base 1, the buffer separation tank 3 being disposed between the vaporization tank 2 and the compressor mounting bracket 4, and conveying pipes 5 being fixedly installed on both the bottom side of the buffer separation tank 3 facing the vaporization tank 2 and the top side facing the compressor mounting bracket 4, a separation component 6 being disposed inside the buffer separation tank 3, and fixed chambers 7 being fixedly installed on both the upper and lower sides of the inner wall of the vaporization tank 2, with at least three vaporization pipe sections 9 disposed between the upper and lower fixed chambers 7.

[0023] In this embodiment, the separation component 6 includes a spiral guide plate 601 fixedly installed on the inner wall of the buffer separation tank 3. A collection cylinder 603 is fixedly installed on the bottom wall of the buffer separation tank 3 along its central axis. A spiral rising channel 602 is formed between the spiral guide plate 601, the outer wall of the collection cylinder 603, and the inner wall of the buffer separation tank 3. The spiral rising channel 602 is connected to the conveying pipes 5 on the upper and lower sides. The inner wall of the collection cylinder 603 has multiple through grooves 604 that communicate with the spiral rising channel 602. A liquid discharge pipe 605 that communicates with the collection cylinder 603 is fixedly connected to the bottom of the buffer separation tank 3. A solenoid valve 606 is installed on the liquid discharge pipe 605. A pressure sensor is installed on the top of the buffer separation tank 3. The pressure sensor is electrically connected to the solenoid valve 606.

[0024] Specifically, the gasified natural gas enters the fixed chamber 7 at the bottom, and then enters the spiral rising channel 602 of the buffer separation tank 3 through the delivery pipe 5. During the spiral rising process, a small amount of liquid substances in the natural gas enters the collection cylinder 603 through the channel 604 due to centrifugal force and gravity, and finally collects at the bottom liquid discharge pipe 605. When the pressure sensor at the top of the buffer separation tank 3 detects that the pressure has reached the set value, it will trigger the solenoid valve 606 to open, discharge the liquid, and reduce the amount of liquid substances entering the subsequent compression stage.

[0025] In this embodiment, a feed pipe 8 extending to the outside is fixedly connected to the top of the top fixed chamber 7 inside the gasification box 2. The feed pipe 8 is connected to the top fixed chamber 7. The bottom fixed chamber 7 inside the gasification box 2 is connected to the spiral rising channel 602 inside the buffer separation tank 3 through one of the conveying pipes 5. A fin assembly 10 is fixedly connected to the outer wall of each gasification pipe section 9. A connecting flange 11 is fixedly connected to both the upper and lower ends of each gasification pipe section 9. Each gasification pipe section 9 can be disassembled and assembled with the upper and lower fixed chambers 7 through the connecting flange 11. Control valves 12 are provided at the connection points between the fixed chambers 7 on the upper and lower sides and the gasification pipe section 9. Insulation cotton 17 is fixedly installed on the inner wall of the gasification box 2. A primary compressor 13 and a secondary compressor 14 are fixedly installed on the compressor mounting bracket 4. The air outlet of the buffer separation tank 3 is connected to the air inlet of the primary compressor 13 through another conveying pipe 5. A connecting pipe 15 is fixedly connected between the air outlet of the primary compressor 13 and the air inlet of the secondary compressor 14. A discharge pipe 16 is fixedly connected to the air outlet of the secondary compressor 14.

[0026] Specifically, LNG enters the fixed chamber 7 at the top of the vaporization tank 2 through the feed pipe 8, and is then distributed to multiple vaporization pipe sections 9. Inside the vaporization tank 2, LNG absorbs heat and gradually vaporizes in the vaporization pipe sections 9. The finned assembly 10 on the outer wall increases the heat exchange area with the surrounding environment, accelerating the vaporization process, while the insulation cotton 17 on the inner wall of the vaporization tank 2 reduces heat loss and ensures vaporization efficiency. Natural gas enters the first-stage compressor 13 on the compressor mounting bracket 4 through the delivery pipe 5. After preliminary compression, it enters the second-stage compressor 14 through the connecting pipe 15 for further compression, and is finally discharged through the discharge pipe 16. In addition, the vaporization pipe sections 9 are connected to the fixed chamber 7 through the connecting flange 11. With the help of the control valve 12, the on / off of each pipe section can be controlled individually, which facilitates disassembly and maintenance without affecting the overall system.

[0027] When using the device, LNG first enters the fixed chamber 7 at the top of the vaporization tank 2 through the feed pipe 8 that runs through the top of the vaporization tank 2 to the outside. The fixed chamber 7 evenly distributes the LNG into at least three vaporization pipe sections 9 connected to it. Each vaporization pipe section 9 is connected to the upper and lower fixed chambers 7 on both sides via connecting flanges 11. Control valves 12 are installed at the corresponding connection points between the upper and lower fixed chambers 7 and the vaporization pipe section 9, allowing individual control of the on / off state of each vaporization pipe section 9. Inside the vaporization tank 2, the LNG absorbs heat and gradually vaporizes in the vaporization pipe sections 9. The finned assembly 10 fixedly connected to the outer wall increases the heat exchange area and accelerates the gasification process. Meanwhile, the insulation cotton 17 fixedly installed on the inner wall of the gasification tank 2 reduces heat loss and ensures gasification efficiency. After gasification, the natural gas enters the fixed chamber 7 at the bottom of the gasification tank 2, and then enters the spiral rising channel 602 inside the buffer separation tank 3 through one of the conveying pipes 5. This spiral rising channel 602 consists of a spiral guide plate 601 fixedly installed on the inner wall of the buffer separation tank 3, the outer wall of the collection cylinder 603 fixedly installed along the central axis on the bottom wall of the buffer separation tank 3, and the buffer separation tank 3... The inner wall of the spiral rising channel 602 is formed together and connected to the conveying pipes 5 on the upper and lower sides. When the natural gas flows in the spiral rising channel 602, the small amount of liquid carried in it enters the collecting cylinder 603 through multiple through slots 604 opened in the inner wall of the collecting cylinder 603 under the action of centrifugal force and gravity, and finally collects into the liquid discharge pipe 605 at the bottom of the buffer separation tank 3, which is connected to the collecting cylinder 603. When the pressure sensor installed on the top of the buffer separation tank 3 detects that the pressure inside the tank reaches the set value, it will trigger the solenoid valve 606 on the liquid discharge pipe 605 to open and discharge the liquid. After separation and purification, the natural gas enters the inlet of the first-stage compressor 13 on the compressor mounting bracket 4 through another delivery pipe 5 from the outlet of the buffer separation tank 3. After initial compression by the first-stage compressor 13, it enters the inlet of the second-stage compressor 14 through the connecting pipe 15 for further compression. Finally, the compressed natural gas is discharged through the discharge pipe 16 fixedly connected to the outlet of the second-stage compressor 14. During the entire process, if a gasification pipe section 9 malfunctions, it can be disassembled and maintained through the connecting flange 11 without affecting the operation of other pipe sections, ensuring stable operation of the system.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An LNG vaporization and recompression device, comprising a base (1), characterized in that: A vaporization box (2), a buffer separation tank (3), and a compressor mounting bracket (4) are fixedly installed on the top of the base (1). The buffer separation tank (3) is located between the vaporization box (2) and the compressor mounting bracket (4). A delivery pipe (5) is fixedly installed on the bottom side of the buffer separation tank (3) facing the vaporization box (2) and the top side facing the compressor mounting bracket (4). A separation component (6) is provided inside the buffer separation tank (3). Fixed chambers (7) are fixedly installed on the upper and lower sides of the inner wall of the vaporization box (2). At least three vaporization pipe sections (9) are provided between the upper and lower fixed chambers (7).

2. The LNG vaporization and recompression apparatus according to claim 1, characterized in that: The separation component (6) includes a spiral guide plate (601) fixedly installed on the inner wall of the buffer separation tank (3), and a collection cylinder (603) is fixedly installed on the bottom wall of the buffer separation tank (3) along its central axis.

3. The LNG vaporization and recompression apparatus according to claim 2, characterized in that: The spiral guide plate (601) forms a spiral rising channel (602) between the outer wall of the collecting cylinder (603) and the inner wall of the buffer separation tank (3), and the spiral rising channel (602) is connected to the conveying pipes (5) on the upper and lower sides.

4. An LNG vaporization and recompression apparatus according to claim 3, characterized in that: The inner wall of the collecting cylinder (603) is provided with multiple through grooves (604) that communicate with the spiral rising channel (602). The bottom of the buffer separation tank (3) is fixedly connected to a liquid discharge pipe (605) that communicates with the collecting cylinder (603). A solenoid valve (606) is installed on the liquid discharge pipe (605). A pressure sensor is installed on the top of the buffer separation tank (3). The pressure sensor is electrically connected to the solenoid valve (606).

5. An LNG vaporization and recompression apparatus according to claim 4, characterized in that: The top of the fixed chamber (7) inside the gasification box (2) is fixedly connected to the top of the feed pipe (8) that extends to the outside. The feed pipe (8) is connected to the fixed chamber (7) at the top. The fixed chamber (7) at the bottom inside the gasification box (2) is connected to the spiral rising channel (602) inside the buffer separation tank (3) through one of the conveying pipes (5).

6. An LNG vaporization and recompression apparatus according to claim 5, characterized in that: Each of the gasification pipe sections (9) is fixedly connected to a fin assembly (10) on its outer wall, and each of the gasification pipe sections (9) is fixedly connected to a connecting flange (11) at both the upper and lower ends.

7. An LNG vaporization and recompression apparatus according to claim 6, characterized in that: Each of the gasification pipe sections (9) is connected to the upper and lower fixed chambers (7) via connecting flanges (11). Control valves (12) are provided at the corresponding connection points between the upper and lower fixed chambers (7) and the gasification pipe sections (9). Insulation cotton (17) is fixedly installed on the inner wall of the gasification box (2).

8. An LNG vaporization and recompression apparatus according to claim 7, characterized in that: A primary compressor (13) and a secondary compressor (14) are fixedly installed on the compressor mounting bracket (4). The outlet of the buffer separator (3) is connected to the inlet of the primary compressor (13) through another conveying pipe (5). A connecting pipe (15) is fixedly connected between the outlet of the primary compressor (13) and the inlet of the secondary compressor (14). A discharge pipe (16) is fixedly connected to the outlet of the secondary compressor (14).

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