Liquid nitrogen vent air cooling capacity recovery device
By using heat dissipation fins in the liquid nitrogen air cooling capacity recovery device to improve energy absorption efficiency and installing an activated carbon filter in the recycling water tank, the problem of low recycling efficiency and excessive water impurities is solved, and efficient cooling capacity recovery and water filtration are achieved.
Patent Information
- Application Number
- CN202421860936.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The existing liquid nitrogen air cooling capacity recovery device lacks the function of improving recycling efficiency and collecting and filtration of water, resulting in the loss of low-temperature cooling capacity during the recycling process, and excessive impurities in the recovered water lead to clogging of the power refrigeration equipment.
A liquid nitrogen air cooling capacity recovery device is designed, and heat dissipation fins are used to improve energy absorption efficiency. An activated carbon filter is installed in the recycling water tank to filter impurities in the recovered water.
By improving energy absorption efficiency and filtering impurities, efficient recycling of low-temperature cooling capacity and cleaning treatment of water are achieved, avoiding cooling capacity loss and equipment blockage.
Smart Images
Figure CN223004815U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cold energy recovery of liquid nitrogen vent gas, in particular to a cold energy recovery device for liquid nitrogen vent gas. Background Technique
[0002] Nitrogen has many uses in industrial production. For convenient use, it is generally stored in the form of liquid nitrogen. Due to the low storage temperature (under a gauge pressure of 0.5 MPa, the temperature can reach about -196 °C), although internal and external heat insulation measures are taken for the cryogenic storage tank, affected by the external environment, external heat will inevitably enter the interior of the cryogenic storage tank, resulting in a certain evaporation rate. Due to the evaporation of liquid nitrogen, when the liquid nitrogen storage tank is under overpressure, the vent gas discharged through the safety valve will cause relatively large material losses and cold energy losses, and have an impact on the environment. Therefore, a cold energy recovery device is generally set for the above-mentioned vent gas.
[0003] Common cold energy recovery devices for liquid nitrogen vent gas only include a recovery function and can recover low-temperature cold energy, but lack the functions of improving the recovery efficiency and collecting and filtering the recovered water. They cannot ensure the recovery efficiency of low-temperature cold energy and the collection and filtering of the recovered water. It is easy to cause the loss of low-temperature cold energy during the recovery process due to the transfer of air, resulting in low recovery efficiency, and too many impurities in the recovered water cause blockage of the power refrigeration equipment, affecting the recovery efficiency of low-temperature cold energy and the problem of impurity blockage.
[0004] Therefore, aiming at the problems of low recovery efficiency of the cold energy recovery device for liquid nitrogen vent gas and the lack of functions of collecting and filtering the recovered water, which cannot ensure the recovery efficiency of low-temperature cold energy and the collection and filtering of the recovered water, it is urgent to be solved. Content of the Utility Model
[0005] In order to overcome the problems that common cold energy recovery devices for liquid nitrogen vent gas lack the functions of improving the recovery efficiency and collecting and filtering the recovered water, it is easy to cause the loss of low-temperature cold energy during the recovery process due to the transfer of air, resulting in low recovery efficiency, and too many impurities in the recovered water cause blockage of the power refrigeration equipment.
[0006] The technical solution of the utility model is: a cold energy recovery device for liquid nitrogen vent gas, including a support bottom plate. Four universal wheels are fixedly arranged at the four corners of the bottom of the support bottom plate in a rectangular shape through bolts. A recovery cylinder is arranged on the top side of the support bottom plate. A sealing round cover is arranged on the top of the recovery cylinder. A liquid nitrogen vent gas vaporizer is arranged at the bottom end inside the recovery cylinder. A heat dissipation ring is arranged at the position corresponding to the liquid nitrogen vent gas vaporizer at the bottom end inside the recovery cylinder. Heat dissipation fins are welded at equal intervals around the heat dissipation ring. A heat exchange coil is welded on the inner wall of the recovery cylinder at the position corresponding to the heat dissipation fins. A recovery water tank is arranged on the other top side of the support bottom plate. An activated carbon filter with a screen is arranged in the middle of the recovery water tank.
[0007] Preferably, by setting heat dissipation fins to expand the efficiency of energy absorption and setting an activated carbon filter to filter impurities in the recycled water, the recovery efficiency of low-temperature cooling capacity is ensured and the dynamic refrigeration equipment is prevented from being blocked, so as to solve the problem that the common air-cooled recovery device for liquid nitrogen discharge only includes a recovery function, can recover low-temperature cooling capacity, but lacks the functions of improving the recovery efficiency and collecting and filtering recycled water, and cannot ensure the recovery efficiency of low-temperature cooling capacity and the collection and filtering of recycled water. It is easy to cause low-temperature cooling capacity to be lost during the recovery process due to air transfer, resulting in low recovery efficiency, and too many impurities in the recycled water causing blockage of the dynamic refrigeration equipment, affecting the recovery efficiency of low-temperature cooling capacity and excessive impurities in the recycled water.
[0008] Preferably, the sealing cover is fixed to the recovery cylinder by bolts. A sealing door is provided around the recovery cylinder, and the sealing door is movably connected to the recovery cylinder through a hinge. The components inside the recovery cylinder can be maintained by opening the sealing cover or the sealing door.
[0009] Preferably, an intake pipe is provided on the top side of the liquid nitrogen discharge air vaporizer, and an outlet pipe is provided on the other top side of the liquid nitrogen discharge air vaporizer. The tops of the intake pipe and the outlet pipe both penetrate through the sealing cover and are placed on its top. Connect the vent pipe on the liquid nitrogen storage tank to the intake pipe, and then connect the connecting pipe of the vaporizer to the outlet pipe. After the vaporizer is started, the discharged air in the liquid nitrogen storage tank enters the liquid nitrogen discharge air vaporizer through the intake pipe. The subcooled vent nitrogen gas further vaporizes by absorbing heat in the liquid nitrogen discharge air vaporizer and is then transported to the next process for utilization or vent treatment through the outlet pipe.
[0010] Preferably, a water inlet pipe is provided at the top of the heat exchange coil, and the top of the water inlet pipe penetrates through the sealing cover and is placed on its top. A water outlet pipe is provided at the bottom of the heat exchange coil. Connect the water delivery pipe of the external water tank to the water inlet pipe on the heat exchange coil. During the operation of the nitrogen discharge air vaporizer, the recycled water in the external water tank enters the heat exchange coil through the water inlet pipe. At this time, the low-temperature cooling capacity after the subcooled vent nitrogen gas further vaporizes by absorbing heat in the nitrogen discharge air vaporizer will be absorbed by the heat dissipation fins. The heat dissipation fins conduct the low-temperature cooling capacity to the heat exchange coil, and when the recycled water flows through the heat exchange coil, the low-temperature cooling capacity is taken away. By using heat dissipation fins to expand the efficiency of low-temperature cooling capacity absorption, the function of improving the recovery efficiency is realized, and the problem that the low-temperature cooling capacity is lost during the recovery process due to air transfer, resulting in low recovery efficiency and affecting the recovery efficiency of low-temperature cooling capacity, is prevented.
[0011] Preferably, one end of the water outlet pipe penetrates through the recovery cylinder and is welded to the side of the recovery water tank. The recycled water flows through the heat exchange coil and then enters the interior of the recovery water tank through the water outlet pipe, and flows towards the drain pipe after being filtered by the activated carbon filter.
[0012] Preferably, a sealed square cover is provided on the top of the recovery water tank. The sealed square cover is fixed to the recovery water tank by bolts. The impurities can be cleaned by opening the sealed square cover.
[0013] Preferably, a number of drain pipes are welded at equal intervals at the bottom of the other side of the recovery water tank. Connect the connecting pipe of the power refrigeration equipment to the drain pipe. The recovered water filtered by the activated carbon filter in the recovery water tank is then transported to the power refrigeration equipment through the drain pipe, realizing the function of collecting and filtering the recovered water and preventing the problem that the power refrigeration equipment is blocked due to excessive impurities in the recovered water.
[0014] The beneficial effects of the present utility model:
[0015] 1. By setting heat dissipation fins to expand the efficiency of energy absorption and setting an activated carbon filter to filter impurities in the recovered water, the recovery efficiency of low-temperature heat and cold is guaranteed and the power refrigeration equipment is prevented from being blocked. To solve the problem that the common liquid nitrogen vent air-cooled cold recovery device only includes a recovery function, can recover low-temperature cold, but lacks the functions of improving the recovery efficiency and collecting and filtering the recovered water, and cannot guarantee the recovery efficiency of low-temperature cold and the collection and filtering of the recovered water. It is easy to cause the loss of low-temperature cold during the recovery process due to the transfer of air, resulting in low recovery efficiency, and the problem that the power refrigeration equipment is blocked due to excessive impurities in the recovered water, affecting the recovery efficiency of low-temperature cold and excessive impurities in the recovered water;
[0016] 2. During the operation of the liquid nitrogen vent air vaporizer, the recovered water in the external water tank enters the heat exchange coil through the water inlet pipe. At this time, the low-temperature cold generated by the further vaporization of the subcooled vent nitrogen by absorbing heat in the liquid nitrogen vent air vaporizer will be absorbed by the heat dissipation fins, and the heat dissipation fins will conduct the low-temperature cold to the heat exchange coil. When the recovered water flows through the heat exchange coil, it takes away the low-temperature cold, and the heat dissipation fins are used to expand the efficiency of absorbing the low-temperature cold, realizing the function of improving the recovery efficiency;
[0017] 3. After flowing through the heat exchange coil, the recovered water enters the interior of the recovery water tank through the water outlet pipe and flows towards the drain pipe after being filtered by the activated carbon filter. The recovered water filtered by the activated carbon filter in the recovery water tank is then transported to the power refrigeration equipment through the drain pipe, realizing the function of collecting and filtering the recovered water. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a three-dimensional structural schematic diagram of a liquid nitrogen vent air-cooled cold recovery device of the present utility model;
[0019] Figure 2 Shown is a three-dimensional bottom view structural schematic diagram of a liquid nitrogen vent air-cooled cold recovery device of the present utility model;
[0020] Figure 3Shown is a three-dimensional sectional structure schematic diagram of a recovery cylinder of a liquid nitrogen vent air-cooling capacity recovery device of the present utility model;
[0021] Figure 4 Shown is a three-dimensional sectional structure schematic diagram of a recovery water tank of a liquid nitrogen vent air-cooling capacity recovery device of the present utility model.
[0022] In the figure: 1, support bottom plate; 2, universal pulley; 3, recovery cylinder; 4, sealing round cover; 5, liquid nitrogen vent air vaporizer; 6, intake pipe; 7, outlet pipe; 8, heat dissipation ring; 9, heat dissipation fins; 10, heat exchange coil; 11, water inlet pipe; 12, water outlet pipe; 13, sealing door; 14, recovery water tank; 15, sealing square cover; 16, activated carbon filter; 17, drain pipe. Specific embodiments
[0023] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0024] Please refer to Figures 1-4 , the present utility model provides an embodiment: a liquid nitrogen vent air-cooling capacity recovery device, including a support bottom plate 1, four universal pulleys 2 are fixedly arranged at the four corners of the bottom of the support bottom plate 1 in a rectangular shape through bolts, a recovery cylinder 3 is arranged on the top side of the support bottom plate 1, a sealing round cover 4 is arranged on the top of the recovery cylinder 3, a liquid nitrogen vent air vaporizer 5 is arranged at the bottom end inside the recovery cylinder 3, a heat dissipation ring 8 is arranged at the position corresponding to the liquid nitrogen vent air vaporizer 5 at the bottom end inside the recovery cylinder 3, heat dissipation fins 9 are welded at equal intervals around the heat dissipation ring 8, a heat exchange coil 10 is welded on the inner wall of the recovery cylinder 3 corresponding to the position of the heat dissipation fins 9, a recovery water tank 14 is arranged on the other top side of the support bottom plate 1, and an activated carbon filter 16 with a screen is arranged in the middle of the recovery water tank 14.
[0025] Please refer to Figures 1-4 , in this embodiment, the sealing round cover 4 is fixed to the recovery cylinder 3 through bolts, a sealing door 13 is arranged on the whole body of the recovery cylinder 3, the sealing door 13 is movably connected to the recovery cylinder 3 through a hinge, during the operation of the liquid nitrogen vent air vaporizer 5, the recovered water in the external water tank enters the heat exchange coil 10 through the water inlet pipe 11, at this time, the low-temperature cold energy after the subcooled vent nitrogen absorbs heat and further vaporizes in the liquid nitrogen vent air vaporizer 5 will be absorbed by the heat dissipation fins 9, and the heat dissipation fins 9 conduct the low-temperature cold energy to the heat exchange coil 10, when the recovered water flows through the heat exchange coil 10, the low-temperature cold energy is taken away, the efficiency of absorbing the low-temperature cold energy is expanded by using the heat dissipation fins 9, after the recovered water flows through the heat exchange coil 10, it enters the inside of the recovery water tank 14 through the water outlet pipe 12, and flows towards the drain pipe 17 after being filtered by the activated carbon filter 16, and the recovered water filtered by the activated carbon filter 16 in the recovery water tank 14 is transported to the power refrigeration equipment through the drain pipe 17, completing the work of improving the recovery efficiency and collecting and filtering the recovered water.
[0026] Please refer to Figures 1-4 In this embodiment, an intake pipe 6 is provided on the top side of the liquid nitrogen vent gasifier 5, and an outlet pipe 7 is provided on the other top side of the liquid nitrogen vent gasifier 5. The tops of the intake pipe 6 and the outlet pipe 7 both penetrate through the sealing cover 4 and are located on its top. The top of the heat exchange coil 10 is provided with a water inlet pipe 11, and the top of the water inlet pipe 11 penetrates through the sealing cover 4 and is located on its top. The bottom of the heat exchange coil 10 is provided with a water outlet pipe 12. One end of the water outlet pipe 12 penetrates through the recovery cylinder 3 and is welded to the side of the recovery water tank 14. The top of the recovery water tank 14 is provided with a sealing square cover 15. The sealing square cover 15 is fixed to the recovery water tank 14 by bolts. A number of drain pipes 17 are welded at equal intervals at the bottom of the other side of the recovery water tank 14. During the operation of the liquid nitrogen vent gasifier 5, the recovered water in the external water tank enters the heat exchange coil 10 through the water inlet pipe 11. At this time, the low-temperature cold energy after the liquid nitrogen absorbs heat and vaporizes in the liquid nitrogen vent gasifier 5 will be absorbed by the heat dissipation fins 9, and the heat dissipation fins 9 conduct the low-temperature cold energy to the heat exchange coil 10. When the recovered water flows through the heat exchange coil 10, it takes away the low-temperature cold energy. The heat dissipation fins 9 are used to improve the efficiency of absorbing the low-temperature cold energy. After the recovered water flows through the heat exchange coil 10, it enters the interior of the recovery water tank 14 through the water outlet pipe 12, and flows towards the drain pipe 17 after being filtered by the activated carbon filter 16. The recovered water filtered by the activated carbon filter 16 in the recovery water tank 14 is transported to the power refrigeration equipment through the drain pipe 17, realizing the functions of improving the recovery efficiency and collecting and filtering the recovered water, preventing the loss of low-temperature cold energy and low recovery efficiency caused by the transfer of low-temperature cold energy through the air during the recovery process, and preventing the blockage of the power refrigeration equipment caused by excessive impurities in the recovered water, affecting the low-temperature cold energy recovery efficiency and impurity blockage problems.
[0027] During operation, connect the vent pipe on the liquid nitrogen storage tank to the intake pipe 6, connect the connecting pipe of the gasifier to the outlet pipe 7, connect the water delivery pipe of the external water tank to the water inlet pipe 11 on the heat exchange coil 10, and finally connect the connecting pipe of the power refrigeration equipment to the drain pipe 17. During the operation of the liquid nitrogen vent gasifier 5, the recovered water in the external water tank enters the heat exchange coil 10 through the water inlet pipe 11. At this time, the low-temperature cold energy after the liquid nitrogen absorbs heat and vaporizes in the liquid nitrogen vent gasifier 5 will be absorbed by the heat dissipation fins 9, and the heat dissipation fins 9 conduct the low-temperature cold energy to the heat exchange coil 10. When the recovered water flows through the heat exchange coil 10, it takes away the low-temperature cold energy. The heat dissipation fins 9 are used to improve the efficiency of absorbing the low-temperature cold energy. After the recovered water flows through the heat exchange coil 10, it enters the interior of the recovery water tank 14 through the water outlet pipe 12, and flows towards the drain pipe 17 after being filtered by the activated carbon filter 16. The recovered water filtered by the activated carbon filter 16 in the recovery water tank 14 is transported to the power refrigeration equipment through the drain pipe 17, realizing the functions of improving the recovery efficiency and collecting and filtering the recovered water.
[0028] Through the above steps, by setting the heat dissipation fins 9 to expand the efficiency of energy absorption and setting the activated carbon filter 16 to filter the impurities in the recycled water, the recovery efficiency of the low-temperature cooling capacity is ensured and the blockage of the power refrigeration equipment is prevented, so as to solve the problem that the common air-cooled low-temperature cooling capacity recovery device for liquid nitrogen release only includes the recovery function, can recover the low-temperature cooling capacity, but lacks the functions of improving the recovery efficiency and collecting and filtering the recycled water, and cannot ensure the recovery efficiency of the low-temperature cooling capacity and the collection and filtering of the recycled water. It is easy to cause the loss of low-temperature cooling capacity during the recovery process due to the transfer of air, resulting in low recovery efficiency, and too many impurities in the recycled water leading to the blockage of the power refrigeration equipment, affecting the recovery efficiency of the low-temperature cooling capacity and the problem of too many impurities in the recycled water.
[0029] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.
Claims
1. A liquid nitrogen venting air cooling recovery device, comprising a supporting bottom plate (1), characterized in that: The four corners of the bottom of the support base plate (1) are rectangular and are fixed with four universal pulleys (2) by bolts. A recovery cylinder (3) is arranged on the top side of the support base plate (1). A sealing round cover (4) is arranged on the top of the recovery cylinder (3). A liquid nitrogen venting air vaporizer (5) is arranged at the bottom of the recovery cylinder (3). A heat dissipation ring (8) is arranged at the position of the liquid nitrogen venting air vaporizer (5) at the bottom of the recovery cylinder (3). Heat dissipation fins (9) are welded at equal intervals around the heat dissipation ring (8). A heat exchange coil (10) is welded on the inner wall of the recovery cylinder (3) at the position of the heat dissipation fins (9). A recovery water tank (14) is arranged on the other side of the top of the support base plate (1). An activated carbon filter (16) with a screen is arranged in the middle of the recovery water tank (14).
2. A liquid nitrogen venting air cooling capacity recovery device according to claim 1, characterized in that: The sealing round cover (4) is fixed to the recovery tube (3) by means of bolts, and a sealing door (13) is arranged around the recovery tube (3), and the sealing door (13) is movably connected to the recovery tube (3) by means of hinges.
3. A liquid nitrogen venting air cooling capacity recovery device according to claim 1, characterized in that: An air inlet pipe (6) is arranged on the top side of the liquid nitrogen venting air vaporizer (5), and an air outlet pipe (7) is arranged on the other side of the top of the liquid nitrogen venting air vaporizer (5). The top ends of the air inlet pipe (6) and the air outlet pipe (7) both pass through the sealing round cover (4) and are placed on the top thereof.
4. A liquid nitrogen venting air cooling capacity recovery device according to claim 1, characterized in that: A water inlet pipe (11) is arranged at the top end of the heat exchange coil (10), the top end of the water inlet pipe (11) passes through the sealing round cover (4) and is placed on the top thereof, and a water outlet pipe (12) is arranged at the bottom end of the heat exchange coil (10).
5. A liquid nitrogen venting air cooling capacity recovery device according to claim 4, characterized in that: One end of the water outlet pipe (12) penetrates through the recovery cylinder (3) and is welded to the side of the recovery water tank (14).
6. A liquid nitrogen venting air cooling capacity recovery device according to claim 1, characterized in that: A sealing square cover (15) is arranged on the top of the recovery water tank (14), and the sealing square cover (15) is fixed to the recovery water tank (14) by bolts.
7. The liquid nitrogen venting air cooling capacity recovery device according to claim 1, characterized in that: A plurality of drainage pipes (17) are welded at equal intervals on the bottom of the other side of the recovery water tank (14).