Efficient condensing device for liquid nitrogen cryogenic oil gas recovery of loading platform

Abstract

The invention discloses an efficient condensing device for liquid nitrogen cryogenic oil gas recovery of a loading platform, which relates to the technical field of oil gas recovery and comprises a fixing frame and a condensing box mounted on the fixing frame. A condensation pipeline set, a moving plate, two fixing boxes used for fixing the condensation pipeline set, a cleaning mechanism used for cleaning the outer wall of the condensation pipeline set and a driving mechanism used for driving the cleaning mechanism to rotate are arranged in the condensation box, the moving plate is arranged in the condensation box in a sealed and sliding mode, and the condensation pipeline set is located under the moving plate. The condensation pipeline set comprises a plurality of condensation pipes arranged in a snake shape, through cooperation of the driving mechanism and the condensation pipeline set, synchronous up-and-down movement and oscillation of the condensation pipeline set can be achieved, and therefore liquid drops condensed in the condensation pipes can be effectively shaken off. According to the condensation pipe, liquid drops can be prevented from being attached to the inner wall of the condensation pipe for a long time, the crystallization problem is avoided, the condensation efficiency is improved, and efficient recovery of oil gas is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas recovery, and in particular to a high-efficiency condensing device for recovering oil and gas by deep cooling with liquid nitrogen on a loading platform. Background Art

[0002] Condensation is a recycling method that can directly realize waste gas resource utilization. It mainly includes mechanical condensation and liquid nitrogen condensation. The former is limited by the refrigeration temperature and is difficult to reach below -120°C. The refrigeration temperature of liquid nitrogen condensation can be as low as -180°C, which can meet the increasingly stringent emission standards.

[0003] Oil and gas recovery technology can effectively reduce the emission of volatile organic compounds (VOCs), which are one of the main sources of air pollution. Through oil and gas recovery, the concentration of harmful substances in the air can be reduced, the air quality can be improved, and the environment can be protected. Oil and gas recovery can not only reduce the waste of oil and gas, but also convert the recovered oil and gas into liquid gasoline, thereby saving resources and improving energy efficiency.

[0004] Oil and gas condensation recovery is a method of converting the light hydrocarbon components in oil and gas from gas phase to liquid phase through refrigeration technology, thereby realizing oil and gas resource recovery. However, the liquid droplets formed by cooling the oil and gas are prone to wall hanging phenomenon, that is, they adhere to the inner wall of the pipeline and are difficult to slide down the pipe wall smoothly for a while to be collected and recovered. The wall hanging phenomenon exists for a long time, which is easy to cause the droplets to crystallize in the pipe. At the least, the oil and gas recovery rate is reduced, and at worst, it causes the pipeline to be blocked. In addition, in a low temperature environment, the surface of the condenser is prone to frost, affecting the heat exchange efficiency.

[0005] In view of the above problems, a high-efficiency condensing device for liquid nitrogen deep-cooling oil and gas recovery on the loading platform is proposed. Summary of the invention

[0006] The object of the present invention is to provide a high-efficiency condensing device for recovering oil and gas by deep cooling with liquid nitrogen on a loading platform, so as to solve the above-mentioned problems.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] The condensing device is a device for recovering oil and gas from liquid nitrogen cryogenics on a loading platform, comprising a fixed frame and a condensing box mounted on the fixed frame, wherein a condensing pipe group, a movable plate, two fixed boxes for fixing the condensing pipe group, a cleaning mechanism for cleaning the outer wall of the condensing pipe group and a driving mechanism for driving the cleaning mechanism to rotate are arranged inside the condensing box, the movable plate is sealingly and slidably arranged in the condensing box, the condensing pipe group is located directly below the movable plate, the condensing pipe group comprises a plurality of condensing tubes arranged in a serpentine shape, the plurality of condensing tubes are equidistantly distributed inside the condensing box, and two adjacent condensing tubes are connected, the two fixed boxes are respectively fixedly arranged on both sides of the bottom of the movable plate, the two ends of all the condensing tubes respectively pass through the two fixed boxes and extend into the interior of the fixed boxes, and all the condensing tubes are fixedly connected to the fixed boxes, the driving mechanism is installed outside the condensing box and is transmission-connected to the movable plate, the cleaning mechanism is installed inside the condensing box, and the cleaning mechanism is interspersed between the plurality of condensing tubes.

[0009] As a preferred solution of the present invention, a partition plate is fixedly connected to one side of the condensation box, and the partition plate divides the interior of the condensation box into a condensation chamber and an oil guide chamber. The movable plate is located in the condensation chamber, and the movable plate divides the interior of the condensation box into an active area and a condensation area. The input end and output end of the condensation pipe group are respectively connected to an air inlet pipe and an oil drain pipe. The air inlet pipe passes through the movable plate and the condensation box in sequence and then extends to the top outside the condensation box. The oil drain pipe passes through the movable plate and then extends to the oil guide chamber. A sliding groove for the oil drain pipe to slide is provided on one side of the top of the partition plate.

[0010] As a preferred solution of the present invention, the two sides of the condensing box are respectively connected with an input pipe and an output pipe, a storage tank is also installed on the fixed frame, the storage tank is located directly below the condensing box, a temporary storage bin is fixedly connected to the bottom of the condensing box, an oil drain hole is connected between the temporary storage bin and the oil guide cavity, an oil pipeline is connected between the storage tank and the temporary storage bin, a control valve is provided on the oil pipeline, and an oil outlet pipe is connected to one side of the storage tank.

[0011] As a preferred solution of the present invention, the cleaning mechanism includes multiple cleaning components, and all of the cleaning components have the same structure. The cleaning components include two positioning plates, a fixing rod and a cleaning strip. The two positioning plates are rotatably arranged on both sides of the condensation box, the fixing rod is arranged between the two positioning plates, and the cleaning strip is spirally arranged outside the fixing rod, and the outer wall of the cleaning strip is in conflict with the outer wall of the condensation tube.

[0012] As a preferred solution of the present invention, the cleaning strip is a spiral silicone strip made of silicone; when the cleaning strip is a spiral silicone strip, the cleaning strip spiral fixing sleeve is arranged outside the fixing rod.

[0013] As a preferred solution of the present invention, the cleaning strip is a spiral sponge strip made of sponge. When the cleaning strip is a spiral sponge strip, one end of the cleaning strip is fixedly connected to the outer wall of the other positioning plate, and the other end of the cleaning strip is fixedly connected to a movable plate, which is rotatably set on a fixed rod, and the movable plate is detachably connected to the positioning plate.

[0014] As a preferred solution of the present invention, the driving mechanism includes a gear set, two tooth plates and two connecting plates, the gear set is installed outside the condensation box, the two tooth plates are respectively arranged on both sides of the condensation box and mesh with the gear set, the two connecting plates are respectively fixed on both sides of the top of the movable plate, guide grooves are opened on both sides of the condensation box, guide rods are connected between the two connecting plates and their adjacent tooth plates, the guide rods pass through the guide grooves and are slidably connected to the guide grooves.

[0015] As a preferred solution of the present invention, the gear set includes two main gears and multiple transmission gears, the two main gears are symmetrically arranged on both sides of the condenser, and the two main gears are fixedly connected to one of the positioning plates, the two main gears are respectively meshed with two tooth plates, all the transmission gears are respectively arranged on both sides of the main gears, and all the transmission gears are respectively fixedly connected to their corresponding positioning plates, and a chain is connected between one of the main gears and all the transmission gears.

[0016] As a preferred solution of the present invention, two limit plates are symmetrically arranged in the active area, the two limit plates are fixedly connected to the partition plate and the inner wall of the condensation box respectively, the movable plate is located below the limit plate, and the guide groove and the slide groove are both located above the limit plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can flexibly adjust the lifting and lowering of the movable plate by setting a driving mechanism. When the movable plate moves up and down, it can drive the condensation pipe group to achieve synchronous up and down movement and oscillation, thereby effectively shaking off the condensed droplets inside the condensation tube. It can prevent the droplets from adhering to the inner wall of the condensation tube for a long time, avoiding the occurrence of crystallization problems. At the same time, the up and down movement and oscillation of the movable plate also help the gas in the condensation tube to better contact with the condensation tube wall, improve the condensation efficiency, and achieve efficient recovery of oil and gas.

[0019] 2. The present invention can synchronously drive multiple cleaning components to rotate through the cooperation of the cleaning mechanism and the driving mechanism, so as to clean the outer wall of the condenser tube. Since the outer wall of the cleaning strip conflicts with the outer wall of the condenser tube, the dirt and sediment on the outer wall of the condenser tube can be effectively removed, keeping the condenser tube clean and running efficiently. This design not only improves the efficiency of oil and gas recovery, but also extends the service life of the condensing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] Figure 1 The present invention provides a schematic diagram of the overall structure of a high-efficiency condensing device for liquid nitrogen deep cooling oil and gas recovery on a loading platform;

[0022] Figure 2 The present invention provides a schematic diagram of the overall structure of a high-efficiency condensing device for liquid nitrogen deep cooling oil and gas recovery on a loading platform;

[0023] Figure 3 A front structural cross-sectional view of a condensation box is provided for the present invention;

[0024] Figure 4 A side structural cross-sectional view of a condensation box is provided for the present invention;

[0025] Figure 5 The present invention provides a partial structural cross-section of the condensation box Figure 1 ;

[0026] Figure 6 A top view of the internal structure of the condensation box is provided for the present invention;

[0027] Figure 7 The present invention provides a partial structural cross-section of the condensation box Figure 2 ;

[0028] Figure 8 A partial structural schematic diagram of a cleaning component is provided for the present invention.

[0029] The numbers in the figure represent the following:

[0030] 1. Fixed frame; 2. Condensation box; 3. Moving plate; 4. Fixed box; 5. Driving mechanism; 6. Cleaning mechanism; 7. Condensation pipe; 8. Air inlet pipe; 9. Oil drain hole; 10. Input pipe; 11. Output pipe; 12. Storage tank; 13. Oil pipeline; 14. Control valve; 15. Temporary storage bin; 16. Oil outlet pipe; 19. Partition plate; 20. Slide; 21. Condensation chamber; 22. Oil guide chamber; 23. Limit plate;

[0031] 51. Gear set; 52. Tooth plate; 53. Connecting plate; 54. Main gear; 55. Transmission gear; 56. Chain; 57. Guide rod; 58. Guide groove; 61. Positioning plate; 62. Fixing rod; 63. Cleaning strip; 64. Movable plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1 - Figure 8 As shown, the present invention provides a high-efficiency condensing device for liquid nitrogen cryogenic oil and gas recovery on a loading platform, comprising a fixed frame 1 and a condensing box 2 installed on the fixed frame 1, wherein a condensing tube group 7, a movable plate 3, two fixed boxes 4 for fixing the condensing tube group 7, a cleaning mechanism 6 for cleaning the outer wall of the condensing tube group 7 and a driving mechanism 5 for driving the cleaning mechanism 6 to rotate are arranged inside the condensing box 2, the movable plate 3 is sealingly and slidably arranged in the condensing box 2, the condensing tube group 7 is located directly below the movable plate 3, the condensing tube group 7 includes a plurality of condensing tubes 7 arranged in a serpentine shape, the plurality of condensing tubes 7 are equidistantly distributed inside the condensing box 2, and two adjacent condensing tubes 7 are connected, the two fixed boxes 4 are respectively fixedly arranged on both sides of the bottom of the movable plate 3, the two ends of all the condensing tubes 7 respectively pass through the two fixed boxes 4 and extend to the inside of the fixed boxes 4, and all the condensing tubes 7 are fixedly connected to the fixed boxes 4, the driving mechanism 5 is installed outside the condensing box 2 and is transmission-connected to the movable plate 3, the cleaning mechanism 6 is installed inside the condensing box 2, and the cleaning mechanism 6 is interspersed between the plurality of condensing tubes 7.

[0034] A partition plate 19 is fixedly connected to one side of the condensation box 2, and the partition plate 19 divides the interior of the condensation box 2 into a condensation chamber 21 and an oil guide chamber 22. The movable plate 3 is located in the condensation chamber 21, and the movable plate 3 divides the interior of the condensation box 2 into an active area and a condensation area. The input end and output end of the condensation pipe 7 group are respectively connected to the air intake pipe 8 and the oil drain pipe. The air intake pipe 8 passes through the movable plate 3 and the condensation box 2 in sequence and then extends to the top outside the condensation box 2. The oil drain pipe passes through the movable plate 3 and then extends to the oil guide chamber 22. A slide groove 20 for the oil drain pipe to slide is provided on one side of the top of the partition plate 19.

[0035] The two sides of the condensing box 2 are respectively connected with an input pipe 10 and an output pipe 11. A storage tank 12 is also installed on the fixed frame 1. The storage tank 12 is located directly below the condensing box 2. A temporary storage bin 15 is fixedly connected to the bottom of the condensing box 2. An oil drain hole 9 is connected between the temporary storage bin 15 and the oil guide cavity 22. An oil pipeline 13 is connected between the storage tank 12 and the temporary storage bin 15. A control valve 14 is provided on the oil pipeline 13. An oil outlet pipe 16 is connected to one side of the storage tank 12.

[0036] Before using the present invention, it is necessary to control the temperature in the condenser box 2 to ensure that the internal temperature of the condenser box 2 meets the requirements of oil and gas condensation. The external refrigerant can be transported to the condenser box 2 by connecting the input pipe 10 and the output pipe 11 to the external pipeline, so as to condense and exchange heat on the condenser tube 7 group. Subsequently, the oil and gas are transported to the inside of one of the fixed boxes 4 through the air inlet pipe 8, and are diverted from the fixed box 4 to the inside of multiple condenser tubes 7. After heat exchange, the temperature of the oil and gas in the condenser tube 7 is reduced and condensed into liquid, and droplets are generated in the condenser tube 7. The droplets are discharged into the oil guide cavity 22 through the oil drain pipe, and are transported to the temporary storage bin 15 through the oil drain hole 9 for temporary storage. At this time, the control valve 14 on the oil delivery pipe 13 is in a closed state. When the oil in the temporary storage bin 15 is stored to a certain amount, the control valve 14 is opened, and the liquid in the temporary storage bin 15 is transported to the storage tank 12 through the oil delivery pipe 13 for storage.

[0037] The cleaning mechanism 6 includes multiple cleaning components, and all the cleaning components have the same structure. The cleaning components include two positioning plates 61, a fixing rod 62 and a cleaning strip 63. The two positioning plates 61 are rotatably arranged on both sides of the inside of the condensation box 2, the fixing rod 62 is arranged between the two positioning plates 61, and the cleaning strip 63 is spirally arranged outside the fixing rod 62, and the outer wall of the cleaning strip 63 is in conflict with the outer wall of the condensation tube 7.

[0038] The positioning plates 61 of the plurality of cleaning components are driven to rotate by the driving mechanism 5, and the rotating positioning plates 61 drive the fixing rod 62 and the cleaning strips 63 spirally arranged outside the fixing rod 62 to rotate together, thereby cleaning the outer wall of the condenser tube 7. Since the outer wall of the cleaning strips 63 is in conflict with the outer wall of the condenser tube 7, the dirt and sediment on the outer wall of the condenser tube 7 can be effectively removed, and the condenser tube 7 can be kept clean and run efficiently. This design not only improves the efficiency of oil and gas recovery, but also prolongs the service life of the condenser tube 7.

[0039] The driving mechanism 5 includes a gear set 51, two tooth plates 52 and two connecting plates 53. The gear set 51 is installed outside the condensation box 2. The two tooth plates 52 are respectively arranged on both sides of the condensation box 2 and mesh with the gear set 51. The two connecting plates 53 are respectively fixed on both sides of the top of the movable plate 3. Guide grooves 58 are opened on both sides of the condensation box 2. Guide rods 57 are connected between the two connecting plates 53 and their adjacent tooth plates 52. The guide rods 57 pass through the guide grooves 58 and are slidably connected to the guide grooves 58.

[0040] The gear set 51 includes two main gears 54 and a plurality of transmission gears 55. The two main gears 54 are symmetrically arranged on both sides of the condenser 2, and the two main gears 54 are fixedly connected to one of the positioning plates 61. The two main gears 54 are respectively meshed with two tooth plates 52. All the transmission gears 55 are respectively arranged on both sides of the main gears 54, and all the transmission gears 55 are respectively fixedly connected to their corresponding positioning plates 61. A chain 56 is connected between one of the main gears 54 and all the transmission gears 55.

[0041] In the present invention, the internal space of the condensation box 2 is divided into an active area and a condensation area by setting the movable plate 3. A driving motor is installed outside the condensation box 2 (this is the prior art, so it is not shown in the figure), and the driving motor is fixedly connected to one of the main gears 54. When the driving motor is started, it can drive the main gear 54 to rotate, and drive all the transmission gears 55 to rotate synchronously through the chain 56. Thereby driving all the positioning plates 61 to rotate, so as to achieve the effect of cleaning the condensation pipe 7. When the main gear 54 rotates, it can drive the two tooth plates 52 to move up and down, thereby driving the connecting plate 53 fixedly connected thereto and the movable plate 3 at the bottom thereof to move up and down, so that the lifting and lowering of the movable plate 3 can be flexibly adjusted. When the movable plate 3 is in the process of moving up and down, the fixed box 4 and the condensation tube 7 fixedly arranged at the bottom of the movable plate 3 are driven by the movable plate 3 to achieve synchronous up and down movement and vibration, so as to effectively shake off the condensed droplets inside the condensation tube 7. In this way, it is possible to prevent the droplets from adhering to the inner wall of the condensation tube 7 for a long time, and avoid the occurrence of crystallization problems. At the same time, the up and down movement and oscillation of the movable plate 3 also help the gas in the condenser tube 7 to better contact with the wall of the condenser tube 7, thereby improving the condensation efficiency and achieving efficient recovery of oil and gas.

[0042] Moreover, as the driving mechanism 5 is able to drive multiple cleaning components and the condenser tube 7 group to operate synchronously, the condenser tube 7 will come into contact with the rotating spiral cleaning strip 63 when moving up and down, and move up and down along the outer wall of the spiral cleaning strip 63, thereby cleaning the outer wall of the condenser tube 7 more comprehensively and thoroughly.

[0043] It is worth noting that in order to prevent the condensing medium at the bottom of the movable plate 3 from entering the active area and causing gas or liquid leakage, two limit plates 23 are symmetrically arranged in the active area. The two limit plates 23 are respectively fixedly connected to the partition plate 19 and the inner wall of the condensation box 2. The movable plate 3 is located below the limit plate 23, and the guide groove 58 and the slide groove 20 are both located above the limit plate 23.

[0044] The two limit plates 23 are provided to limit the rising height of the movable plate 3 to prevent the condensing medium at the bottom from entering the slideway and guide groove 58. Furthermore, in order to improve the sealing of the movable plate 3, a sealing bag may be connected between the movable plate 3 and the limit plate to prevent leakage of the condensing medium.

[0045] The cleaning strip 63 is a spiral silicone strip made of silicone. When the cleaning strip 63 is a spiral silicone strip, the cleaning strip 63 is spirally fixedly sleeved outside the fixing rod 62 .

[0046] The silicone material has good flexibility and wear resistance, which enables the spiral silicone strip to better fit the outer wall of the condenser tube 7 during rotation to ensure the cleaning effect. At the same time, the corrosion resistance of the silicone can also ensure that it will not be damaged by chemical reactions during long-term contact with the condenser tube 7.

[0047] When the cleaning strip 63 is a spiral silica gel strip, it can be suitable for different heat exchange media to ensure the cleaning effect of the condenser tube 7.

[0048] The cleaning strip 63 is a spiral sponge strip made of sponge. When the cleaning strip 63 is a spiral sponge strip, one end of the cleaning strip 63 is fixedly connected to the outer wall of another positioning plate 61, and the other end of the cleaning strip 63 is fixedly connected to a movable plate 64. The movable plate 64 is rotatably set on the fixed rod 62, and the movable plate 64 is detachably connected to the positioning plate 61.

[0049] The spiral sponge strip has excellent water absorption and softness. When the heat exchange medium inside the condenser box 2 is liquid, the spiral sponge strip expands when it meets water, which can greatly increase the contact area between the cleaning strip 63 and the condenser tube 7, thereby improving the cleaning efficiency of the cleaning strip 63. In addition, the cleaning strip 63 can effectively absorb dirt and moisture on the outer wall of the condenser tube 7 during the rotating cleaning process, further improving the cleaning efficiency. At the same time, the movable plate 64 and the positioning plate 61 are detachable, so that when the cleaning strip 63 is in the cleaning state, the movable plate 64 and the positioning plate 61 are fixedly connected. When the liquid heat exchange medium inside the condenser box 2 is discharged, the movable plate 64 can be separated from the positioning plate 61. At this time, the rotating movable plate 64 can drive the cleaning strip 63 to rotate synchronously, thereby driving one end of the cleaning strip 63 to rotate to wring out the moisture on the cleaning strip 63. In addition, the structural design of the spiral cleaning strip 63 is also convenient for adjusting the length and tightness of the cleaning strip 63 according to the size and spacing of the condenser tube 7 to ensure the best cleaning effect.

[0050] The protection scope of the application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the application within the essence and protection scope of the application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the application.

Claims

1. A high-efficiency condensing device for recovering oil and gas by deep cooling with liquid nitrogen on a loading platform, comprising a fixed frame (1) and a condensing box (2) mounted on the fixed frame (1), characterized in that: The condenser box (2) is provided with a condenser tube (7) group, a movable plate (3), two fixing boxes (4) for fixing the condenser tube (7) group, a cleaning mechanism (6) for cleaning the outer wall of the condenser tube (7) group, and a driving mechanism (5) for driving the cleaning mechanism (6) to rotate. The movable plate (3) is sealingly slidably arranged in the condenser box (2). The condenser tube (7) group is located directly below the movable plate (3). The condenser tube (7) group includes a plurality of condenser tubes (7) arranged in a serpentine shape. The plurality of condenser tubes (7) are evenly distributed in the condenser box ( 2), and two adjacent condensing tubes (7) are connected, the two fixing boxes (4) are respectively fixedly arranged on both sides of the bottom of the movable plate (3), both ends of all the condensing tubes (7) respectively pass through the two fixing boxes (4) and extend into the fixing boxes (4), and all the condensing tubes (7) are fixedly connected to the fixing boxes (4), the driving mechanism (5) is installed outside the condensing box (2) and is transmission-connected to the movable plate (3), the cleaning mechanism (6) is installed inside the condensing box (2), and the cleaning mechanism (6) is interspersed between the plurality of condensing tubes (7).

2. According to claim 1, a high-efficiency condensing device for recovering oil and gas by liquid nitrogen cryogenic cooling on a loading platform is characterized in that: A partition plate (19) is fixedly connected to one side of the condensing box (2), and the partition plate (19) divides the interior of the condensing box (2) into a condensing chamber (21) and an oil guide chamber (22). The movable plate (3) is located in the condensing chamber (21), and the movable plate (3) divides the interior of the condensing box (2) into an active area and a condensing area. The input end and the output end of the condensing pipe (7) group are respectively connected to an air intake pipe (8) and an oil discharge pipe (24). The air intake pipe (8) passes through the movable plate (3) and the condensing box (2) in sequence and then extends to the top of the condensing box (2). The oil discharge pipe (24) passes through the movable plate (3) and then extends to the oil guide chamber (22). A slide groove (20) for the oil discharge pipe (24) to slide is provided on one side of the top of the partition plate (19).

3. The high-efficiency condensing device for recovering oil and gas by liquid nitrogen cryogenic cooling on a loading platform according to claim 2 is characterized by: The two sides of the condensing box (2) are respectively connected with an input pipe (10) and an output pipe (11); a storage tank (12) is also installed on the fixed frame (1); the storage tank (12) is located directly below the condensing box (2); a temporary storage bin (15) is fixedly connected to the bottom of the condensing box (2); an oil drain hole (9) is connected between the temporary storage bin (15) and the oil guide cavity (22); an oil delivery pipe (13) is connected between the storage tank (12) and the temporary storage bin (15); a control valve (14) is provided on the oil delivery pipe (13); and one side of the storage tank (12) is connected with an oil outlet pipe (16).

4. According to claim 2, a high-efficiency condensing device for recovering oil and gas by liquid nitrogen cryogenic cooling on a loading platform is characterized in that: The cleaning mechanism (6) includes a plurality of cleaning components, and all of the cleaning components have the same structure. The cleaning components include two positioning plates (61), a fixing rod (62) and a cleaning strip (63). The two positioning plates (61) are rotatably arranged on both sides of the interior of the condensation box (2), the fixing rod (62) is arranged between the two positioning plates (61), and the cleaning strip (63) is spirally arranged outside the fixing rod (62), and the outer wall of the cleaning strip (63) is in conflict with the outer wall of the condensation tube (7).

5. According to claim 4, a high-efficiency condensing device for recovering oil and gas by liquid nitrogen cryogenic cooling on a loading platform is characterized in that: The cleaning strip (63) is a spiral silicone strip made of silicone. When the cleaning strip (63) is a spiral silicone strip, the cleaning strip (63) is spirally fixedly sleeved outside the fixing rod (62).

6. The high-efficiency condensing device for recovering oil and gas by liquid nitrogen cryogenic cooling at a loading platform according to claim 4 is characterized by: The cleaning strip (63) is a spiral sponge strip made of sponge. When the cleaning strip (63) is a spiral sponge strip, one end of the cleaning strip (63) is fixedly connected to the outer wall of the other positioning plate (61), and the other end of the cleaning strip (63) is fixedly connected to a movable plate (64). The movable plate (64) is rotatably arranged on the fixed rod (62), and the movable plate (64) is detachably connected to the positioning plate (61).

7. The high-efficiency condensing device for recovering oil and gas by deep cooling with liquid nitrogen on a loading platform according to claim 4 is characterized by: The driving mechanism (5) comprises a gear set (51), two tooth plates (52) and two connecting plates (53); the gear set (51) is mounted outside the condensing box (2); the two tooth plates (52) are respectively arranged on both sides of the condensing box (2) and mesh with the gear set (51); the two connecting plates (53) are respectively fixed on both sides of the top of the moving plate (3); guide grooves (58) are provided on both sides of the condensing box (2); guide rods (57) are connected between the two connecting plates (53) and the adjacent tooth plates (52); the guide rods (57) pass through the guide grooves (58) and are slidably connected to the guide grooves (58).

8. The high-efficiency condensing device for recovering oil and gas by deep cooling with liquid nitrogen on a loading platform according to claim 7, characterized in that: The gear set (51) comprises two main gears (54) and a plurality of transmission gears (55); the two main gears (54) are symmetrically arranged on both sides of the condenser (2), and the two main gears (54) are fixedly connected to one of the positioning plates (61); the two main gears (54) are respectively meshed with two tooth plates (52); all the transmission gears (55) are respectively arranged on both sides of the main gears (54), and all the transmission gears (55) are respectively fixedly connected to their corresponding positioning plates (61); a chain (56) is transmission-connected between one of the main gears (54) and all the transmission gears (55).

9. The high-efficiency condensing device for recovering oil and gas by deep cooling with liquid nitrogen on a loading platform according to claim 7, characterized in that: Two limit plates (23) are symmetrically arranged in the activity area, and the two limit plates (23) are fixedly connected to the partition plate (19) and the inner wall of the condensation box (2) respectively; the movable plate (3) is located below the limit plates (23), and the guide groove (58) and the slide groove (20) are both located above the limit plates (23).

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