A LNG reliquefaction recovery device

Abstract

The utility model provides a kind of for LNG reliquefaction recovery device, including condensing tank, bottom plate, separating mechanism, release subassembly and cleaning mechanism, the inside of condensing tank is provided with condensing pipeline, the surface welding of bottom plate has square board, support rod and first spring, another end of support rod and first spring is respectively welded in the top surface of condensing tank and the bottom surface of liquid-collecting square box, the side of liquid-collecting square box and the side of square board are all provided with conductive copper sheet, the bottom surface of condensing tank is connected with separating pipeline, the side of liquid-collecting square box is connected with output square box, this LNG reliquefaction recovery device is through the separating mechanism of installation, avoid the steam that has not condensed with the LNG of condensation Heavy back storage tank, prevent the pressure abnormal rise caused by steam reflux of storage tank, ensure the stable operation of device, and when separating pipeline inside liquid is full, automatic plugging entrance and discharge, without manual additional operation, save labor cost.

Description

Technical Field

[0001] This utility model relates to the field of liquefaction and recycling technology, specifically to an LNG reliquefaction and recycling device. Background Technology

[0002] LNG reliquefaction and recovery technology is used to treat the vapors generated during transportation and storage. It recovers energy through efficient liquefaction, ensures safety, and reduces emissions. It is mainly used in LNG tank trucks, ships, and receiving terminals. According to existing technology, such as the vapor liquefaction and recovery device for liquefied natural gas receiving terminals described in Chinese patent document CN214008651U, the disclosed technical solution uses a refrigerant compressor, a base plate, a box-shaped base, a rectangular tube, guide rods, guide sleeves, a pressure regulating plate, buffer springs, screws, internally threaded sleeves, positioning rods, steel racks, electric telescopic rods, gears, support balls, limit blocks, and grooves in cooperation. When the refrigerant compressor operates and generates vibration, it drives the base plate to move downward. The base plate drives the rectangular tube to slide downward within the box-shaped base. The base plate drives the four guide rods to slide downward within their respective guide sleeves and compress multiple buffer springs. The buffer springs can softly alleviate the impact force and achieve a vibration isolation effect.

[0003] According to its publicly available technical solution, in the existing technology, after the steam enters the cold box and condenses, it is discharged into the interior of the storage tank through the output pipe on the side of the cold box. In this process, a small amount of unliquefied steam may be discharged into the interior of the storage tank along with the gas transmission pipeline. After the steam enters the storage tank, it is collected again and enters the cold box, which will cause the pressure inside the storage tank to increase, thereby triggering the safety valve to release and causing natural gas to be wasted. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an LNG reliquefaction and recovery device to solve the problems mentioned in the background. This invention utilizes an installed separation mechanism. After vapor liquefaction, it flows into the separation pipe. As the liquid inside the separation pipe increases, a floating plate rises. When the floating plate reaches the top, it locks. At this point, the vapor inside the separation pipe is squeezed back into the condensation pipe by the liquid for further condensation. This prevents uncondensed vapor from returning to the storage tank with the condensed LNG, thus preventing abnormal pressure increases in the storage tank due to vapor backflow and ensuring stable operation of the device. Furthermore, when the liquid inside the separation pipe is full, the inlet is automatically sealed and discharged, eliminating the need for manual operation and saving labor costs.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an LNG reliquefaction and recovery device, comprising a recovery device body, the recovery device body including a condensation tank, a bottom plate, a separation mechanism, a release component, and a cleaning mechanism, wherein a condensation pipe is provided inside the condensation tank, a square plate, a support rod, and a first spring are welded to the surface of the bottom plate, the other ends of the support rod and the first spring are respectively welded to the top surface of the condensation tank and the bottom surface of the liquid collection box, conductive copper sheets are provided on the side of the liquid collection box and the side of the square plate, a separation pipe is connected to the bottom surface of the condensation tank, and an output box is connected to the side of the liquid collection box.

[0006] Furthermore, the separation mechanism includes a floating plate, a fourth connecting rod, and a second circular plug. Circular holes are provided on the side of the separation pipe and the surface of the second circular plug. The second circular plug and the floating plate are both disposed inside the separation pipe. The two ends of the fourth connecting rod are respectively welded to the bottom surface of the floating plate and the top surface of the second circular plug.

[0007] Furthermore, the second circular plug has a raised strip connected to its side, the inner wall of the separation pipe has a groove, the raised strip is embedded in the groove, the bottom surface of the separation pipe is welded with a second circular column, the bottom surface of the liquid collection box is embedded with an electromagnet, and the top surface of the floating plate is embedded with a magnetic sheet.

[0008] Furthermore, the release assembly includes a first connecting rod, a second connecting rod, and a discharge pipe. The two ends of the first connecting rod are respectively welded to the side of the first circular plug and the side of the circular cylinder. The two ends of the second connecting rod are respectively welded to the top surface of the long rod and the bottom surface of the circular cylinder. The long rod is inserted into the side of the liquid collection box.

[0009] Furthermore, a fixing plate is welded to the top surface of the long rod, and a second spring is welded to the side of the fixing plate. The other end of the second spring is welded to the inner wall of the liquid collection box.

[0010] Furthermore, the end of the discharge pipe is connected to the bottom surface of the output box, and the bottom surface of the liquid collection box is provided with a positioning hole, and a spring buckle is provided below the positioning hole.

[0011] Furthermore, the cleaning mechanism includes a filter screen and a third connecting rod, the filter screen being disposed inside the input pipe, and the surface of the filter screen being provided with a textured surface.

[0012] Furthermore, the end of the third link is connected to the top surface of the floating plate, and a thin rod is welded to the side of the third link, with the end of the thin rod contacting the textured surface.

[0013] The beneficial effects of this utility model are:

[0014] 1. This LNG reliquefaction and recovery unit uses a separation mechanism to allow vapor to liquefy and flow into the separation pipe. As the liquid level inside the separation pipe increases, a floating plate rises. When the floating plate reaches the top, it locks, at which point the vapor inside the separation pipe is squeezed back into the condensation pipe by the liquid to continue condensing. This prevents uncondensed vapor from returning to the storage tank with the condensed LNG, thus preventing abnormal pressure increases in the storage tank due to vapor backflow and ensuring stable operation of the unit. Furthermore, when the liquid inside the separation pipe is full, the inlet is automatically sealed and discharged, eliminating the need for manual operation and saving labor costs.

[0015] 2. The LNG reliquefaction and recovery unit uses a release component to automatically release the internal liquid when the liquid collection box reaches a predetermined value. At the same time, the release releases the locking state of the floating plate, allowing the separation pipeline to start the next round of separation work. This avoids process interruption caused by human operation errors and improves the reliability of the unit's operation. After the release is completed, the liquid collection box can be reset by manually pushing the long rod, making the operation simple and convenient.

[0016] 3. In the LNG reliquefaction and recovery unit, the cleaning mechanism installed allows the thin rod to slide along the textured surface of the filter screen during the locking and unlocking process of the floating plate, causing the filter screen to vibrate and shake off the trace impurities attached to the filter screen surface, thus preventing a reduction in the input gas volume due to filter screen blockage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of an LNG reliquefaction and recovery device according to the present invention;

[0018] Figure 2 This is a cross-sectional view of an LNG reliquefaction and recovery device according to the present invention;

[0019] Figure 3 This is a side view of a liquid collection box for an LNG reliquefaction and recovery device according to the present invention.

[0020] Figure 4 This is a front view of a liquid collection box for an LNG reliquefaction and recovery device according to the present invention.

[0021] Figure 5 for Figure 2 Enlarged view of region B in the middle;

[0022] Figure 6 for Figure 2 Enlarged view of region A in the middle;

[0023] Figure 7 for Figure 2 Enlarged view of region C;

[0024] In the diagram: 1. Condensate tank; 2. Separation mechanism; 3. Release assembly; 4. Cleaning mechanism; 5. Separation pipe; 6. Square plate; 7. Base plate; 8. First spring; 9. Liquid collection box; 10. Support rod; 11. Condensate pipe; 12. First circular plug; 13. First connecting rod; 14. Long rod; 15. Second spring; 16. Input pipe; 17. Discharge pipe; 18. Spring clip; 19. First circular column; 20. Output box; 21. Floating plate; 22. Fourth connecting rod; 23. Second circular plug; 24. Second connecting rod; 25. Third connecting rod; 26. Thin rod; 27. Filter screen; 28. Second circular column; 29. ​​Electromagnet; 30. Magnetic sheet. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1 to 7 This utility model provides the following technical solution: an LNG reliquefaction and recovery device, comprising a recovery device body, the recovery device body including a condenser tank 1, a bottom plate 7, a separation mechanism 2, a release component 3, and a cleaning mechanism 4. The condenser tank 1 is provided with a condensation pipe 11 inside. The bottom plate 7 is welded with a square plate 6, a support rod 10, and a first spring 8. The other ends of the support rod 10 and the first spring 8 are respectively welded to the top surface of the condenser tank 1 and the bottom surface of the liquid collection box 9. Conductive copper sheets are provided on the side of the liquid collection box 9 and the side of the square plate 6. The bottom surface of the condenser tank 1 is connected to a separation pipe 5. The side of the liquid collection box 9 is connected to an output box 20. After the vapor is condensed into liquid, it enters the interior of the separation pipe 5 and is discharged into the interior of the liquid collection box 9 through the separation pipe 5. Finally, the liquid flows back into the storage tank through the release component 3.

[0027] In this embodiment, the separation mechanism 2 includes a floating plate 21, a fourth connecting rod 22, and a second circular plug 23. Circular holes are provided on the side of the separation pipe 5 and the surface of the second circular plug 23. The second circular plug 23 and the floating plate 21 are both disposed inside the separation pipe 5. The two ends of the fourth connecting rod 22 are welded to the bottom surface of the floating plate 21 and the top surface of the second circular plug 23, respectively. A protruding strip is connected to the side of the second circular plug 23. A groove is provided on the inner wall of the separation pipe 5, and the protruding strip is embedded inside the groove. A second circular column 28 is welded to the bottom surface of the separation pipe 5. An electromagnet 29 is embedded in the bottom surface of the liquid collection box 9. A magnetic sheet 30 is embedded in the top surface of the floating plate 21. As the liquid inside the separation pipe 5 increases, the floating plate 21 rises to the top and locks. The rise of the floating plate 21 is linked to the synchronous rise of the second circular plug 23, thereby allowing the liquid inside the separation pipe 5 to flow into the liquid collection box 9.

[0028] In this embodiment, the release assembly 3 includes a first connecting rod 13, a second connecting rod 24, and a discharge pipe 17. The two ends of the first connecting rod 13 are respectively welded to the side of the first circular plug 12 and the side of the circular cylinder. The two ends of the second connecting rod 24 are respectively welded to the top surface of the long rod 14 and the bottom surface of the circular cylinder. The long rod 14 is inserted into the side of the liquid collection box 9. A fixing plate is welded to the top surface of the long rod 14, and a second spring 15 is welded to the side of the fixing plate. The other end of the second spring 15 is welded to the liquid collection box. On the inner wall of the square box 9, the end of the discharge pipe 17 is connected to the bottom surface of the output square box 20. The bottom surface of the liquid collecting square box 9 is provided with a positioning hole, and a spring buckle 18 is provided below the positioning hole. The spring buckle 18 is inserted into the positioning hole on the bottom surface of the liquid collecting square box 9. The protrusion on the side of the spring buckle 18 springs open, causing the long rod 14 to move. The displacement of the long rod 14 is linked to the displacement of the first circular plug 12, so that the liquid inside the liquid collecting square box 9 flows into the interior of the output square box 20, and finally flows back to the storage tank through the discharge pipe 17.

[0029] In this embodiment, the cleaning mechanism 4 includes a filter screen 27 and a third connecting rod 25. The filter screen 27 is disposed inside the input pipe 16, and the surface of the filter screen 27 is provided with a textured surface. The end of the third connecting rod 25 is connected to the top surface of the floating plate 21, and a thin rod 26 is welded to the side of the third connecting rod 25. The end of the thin rod 26 contacts the surface of the textured surface. The up and down displacement of the floating plate 21 is linked to the synchronous displacement of the thin rod 26. As the end of the thin rod 26 moves on the textured surface of the filter screen 27, the filter screen 27 vibrates, thereby shaking off the trace impurities attached to the surface of the filter screen 27.

[0030] Working principle: Condensate is injected into the condenser tank 1. The square plate 6 and the conductive copper sheet on the side of the liquid collection box 9 are in contact with each other. The electromagnet 29 on the bottom of the liquid collection box 9 has magnetic force. Steam enters the condenser pipe 11 through the input pipe 16. During the process, the filter screen 27 removes trace impurities from the steam. The liquid formed by condensation inside the condenser pipe 11 flows into the separation pipe 5 under the action of gravity. When the separation pipe 5 is full of liquid, the floating plate 21 rises to the top of the separation pipe 5. The magnetic sheet 30 on the top surface of the floating plate 21 is attracted by the electromagnet 29 on the bottom surface of the liquid collection box 9. At this time, the steam inside the separation pipe 5 is squeezed back into the condenser pipe 11 by the liquid to continue condensing. The floating plate 21 rises and drives the third link Rod 25, thin rod 26, fourth connecting rod 22, and second circular plug 23 rise synchronously. During the ascent of thin rod 26, the end of thin rod 26 contacts the textured surface of filter screen 27, causing filter screen 27 to vibrate and shake off the trace impurities adhering to its surface. As second circular plug 23 rises along the side groove, second circular column 28 disengages from the circular hole on the surface of second circular plug 23. Liquid flows through the circular holes on the surfaces of second circular plug 23 and separation pipe 5 into the liquid collection box 9. As the liquid inside the liquid collection box 9 increases, first spring 8 enters a compressed state, and liquid collection box 9 moves downward. When the liquid inside separation pipe 5 is emptied, liquid collection box 9 descends until spring latch 18 inserts into the collection box. Inside the positioning hole on the bottom of the square box 9, the square plate 6 stops contacting the conductive copper sheet on the side of the liquid collecting square box 9, the electromagnet 29 loses its magnetic force, and the floating plate 21 loses its attraction force and moves downward to return to its initial position. The downward movement of the floating plate 21 drives the third connecting rod 25, the thin rod 26, the fourth connecting rod 22, and the second circular plug 23 to move downward synchronously. During the downward movement of the thin rod 26, the filter screen 27 vibrates again, and the second circular plug 23 returns to its initial position, sealing the circular hole on the side of the second circular plug 23 and the separation pipe 5. During the insertion of the spring buckle 18 into the positioning hole, the protrusion on the side of the spring buckle 18 pops open inside the positioning hole, locking the liquid collecting square box 9. The popping open of the protrusion pushes the long rod 14 to move. At this time, the second spring 1 5. When entering the compression state, the displacement of the long rod 14 causes the second connecting rod 24, the first circular column 19, the first connecting rod 13, and the first circular plug 12 to move synchronously. The displacement of the first circular plug 12 causes the liquid inside the liquid collection box 9 to flow into the liquid output box 20. The liquid inside the liquid output box 20 flows into the storage tank through the discharge pipe 17. When the liquid inside the liquid collection box 9 is emptied, the long rod 14 is manually pushed to compress the protrusion on the side of the spring clip 18. The liquid collection box 9 returns to its initial position under the elastic force of the first spring 8. The long rod 14 is released, and the long rod 14 returns to its initial position under the elastic force of the second spring 15. The second connecting rod 24, the first circular column 19, the first connecting rod 13, and the first circular plug 12 return to their initial positions synchronously.

[0031] 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.

[0032] 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. A device for LNG reliquefaction and recovery, comprising a recovery device body, characterized in that: The main body of the recycling device includes a condenser tank (1), a bottom plate (7), a separation mechanism (2), a release component (3), and a cleaning mechanism (4). The condenser tank (1) is provided with a condensation pipe (11). The bottom plate (7) is welded with a square plate (6), a support rod (10), and a first spring (8). The other ends of the support rod (10) and the first spring (8) are respectively welded to the top surface of the condenser tank (1) and the bottom surface of the liquid collection box (9). The side of the liquid collection box (9) and the side of the square plate (6) are provided with conductive copper sheets. The bottom surface of the condenser tank (1) is connected to a separation pipe (5). The side of the liquid collection box (9) is connected to an output box (20).

2. The LNG reliquefaction and recovery device according to claim 1, characterized in that: The separation mechanism (2) includes a floating plate (21), a fourth connecting rod (22), and a second circular plug (23). The side of the separation pipe (5) and the surface of the second circular plug (23) are both provided with circular holes. The second circular plug (23) and the floating plate (21) are both located inside the separation pipe (5). The two ends of the fourth connecting rod (22) are respectively welded to the bottom surface of the floating plate (21) and the top surface of the second circular plug (23).

3. The LNG reliquefaction and recovery device according to claim 2, characterized in that: The second circular plug (23) has a protruding strip connected to its side. The inner wall of the separation pipe (5) has a groove. The protruding strip is embedded in the groove. The bottom surface of the separation pipe (5) is welded with a second circular column (28). The bottom surface of the liquid collection box (9) is embedded with an electromagnet (29). The top surface of the floating plate (21) is embedded with a magnetic sheet (30).

4. The LNG reliquefaction and recovery device according to claim 1, characterized in that: The release assembly (3) includes a first connecting rod (13), a second connecting rod (24), and a discharge pipe (17). The two ends of the first connecting rod (13) are respectively welded to the side of the first circular plug (12) and the side of the circular cylinder. The two ends of the second connecting rod (24) are respectively welded to the top surface of the long rod (14) and the bottom surface of the circular cylinder. The long rod (14) is inserted into the side of the liquid collection box (9).

5. The LNG reliquefaction and recovery device according to claim 4, characterized in that: A fixing plate is welded to the top surface of the long rod (14), and a second spring (15) is welded to the side of the fixing plate. The other end of the second spring (15) is welded to the inner wall of the liquid collection box (9).

6. The LNG reliquefaction and recovery device according to claim 5, characterized in that: The end of the discharge pipe (17) is connected to the bottom surface of the output box (20). The bottom surface of the liquid collection box (9) is provided with a positioning hole, and a spring buckle (18) is provided below the positioning hole.

7. The LNG reliquefaction and recovery device according to claim 1, characterized in that: The cleaning mechanism (4) includes a filter screen (27) and a third connecting rod (25). The filter screen (27) is disposed inside the input pipe (16), and the surface of the filter screen (27) is provided with a textured surface.

8. The LNG reliquefaction and recovery device according to claim 7, characterized in that: The end of the third link (25) is connected to the top surface of the floating plate (21), and a thin rod (26) is welded to the side of the third link (25). The end of the thin rod (26) contacts the surface with a textured surface.

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