Cooling device for nitrogen purification

Abstract

According to the cooling device for nitrogen purification, an ultrasonic descaling device is arranged at the bottom of a cooling box, and ultrasonic energy is spread in cooling liquid, so that impurities and a scale layer on the outer wall of a conveying pipe are broken and fall off, and therefore long-term accumulation of the impurities in the cooling liquid is prevented, and the good heat transfer effect of the surface of the pipeline is guaranteed; the service life of the equipment is prolonged; the heat exchange device adopts the combination of the circulating water pump and the heat exchanger, so that the cooling liquid can efficiently and circularly return to the cooling box after being cooled by the heat exchange device, and the energy conversion efficiency and the operation stability of the whole system are improved; the conveying pipe is of a snakelike pipeline structure, the contact area between the conveying pipe and cooling liquid can be further increased, cooling efficiency is improved, and meanwhile the influence of local temperature difference on the nitrogen cooling effect is reduced.

Description

Technical Field

[0001] This application relates to the field of nitrogen purification technology, and more specifically to a cooling device for nitrogen purification. Background Technology

[0002] The preparation of high-purity nitrogen has wide applications in industrial production and scientific research, such as in the electronics industry, chemical synthesis, and special environmental protection fields. One commonly used nitrogen purification method is carbon-supported deoxygenation technology. Its basic principle is to use carbon loaded with a catalyst to convert oxygen in nitrogen into carbon dioxide at a relatively low temperature, and then achieve high-purity nitrogen through subsequent removal steps. During this process, because the catalytic reaction inevitably involves the breaking of chemical bonds and the formation of new bonds, accompanied by the release of a large amount of heat, the temperature change in the reaction system is significant. Therefore, after completing the deoxygenation process, effective cooling of the produced nitrogen is a necessary step to ensure the stability of the nitrogen and its safety for subsequent use.

[0003] Traditionally, to cool nitrogen gas, the method of immersing the nitrogen delivery pipes in a coolant for heat exchange is commonly used. However, in practice, coolants often contain trace amounts of impurities or suspended particles, which can easily deposit or adhere to the inner and outer surfaces of the nitrogen delivery pipes during the cooling process. This adhesion not only reduces the heat transfer efficiency of the pipe surface but can also cause uneven local temperatures, severely impacting the stable operation and cooling effect of the entire cooling system, and potentially even negatively affecting further processing stages after nitrogen purification. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this application is to provide a cooling device for nitrogen purification to solve the problems mentioned in the background art.

[0005] According to one aspect of this application, a cooling device for nitrogen purification includes a deoxygenating purifier and a nitrogen cooling device. The outlet of the deoxygenating purifier is connected to the inlet of the nitrogen cooling device. The deoxygenating purifier is used to convert oxygen in nitrogen into carbon dioxide and then remove the carbon dioxide to obtain high-purity nitrogen. The nitrogen cooling device is used to cool the purified nitrogen. The nitrogen cooling device includes a cooling box, a delivery pipe, an ultrasonic descaling device, and a heat exchanger. The delivery pipe is fixedly disposed inside the cooling box, and the inlet and outlet of the delivery pipe are respectively inserted through... Through the left and right side walls of the cooling box, the air inlet of the conveying pipe is connected to the air outlet of the deoxygenation purifier. The air outlet of the conveying pipe outputs cooled high-purity nitrogen. An ultrasonic descaling device is installed at the bottom of the cooling box. Coolant is placed in the inner cavity of the cooling box. The ultrasonic descaling device can break down and remove impurities and scale on the outer wall of the conveying pipe by transmitting ultrasonic waves in the coolant. Heat exchange devices are fixedly installed on both the left and right side walls of the cooling box. The coolant in the cooling box can flow back into the inner cavity of the cooling box after being cooled by the heat exchange devices.

[0006] Preferably, the ultrasonic descaling device includes a support cover, an ultrasonic generator, and ultrasonic transducers. The support cover is fixedly installed at the bottom of the cooling box. The ultrasonic generator is installed inside the support cover and is connected to an external power source. Multiple ultrasonic transducers are installed on the outer bottom surface of the cooling box inside the support cover, and each ultrasonic transducer is electrically connected to the ultrasonic generator.

[0007] Preferably, the outer bottom surface of the cooling box is a vibrating steel plate.

[0008] Preferably, the heat exchange device includes a circulating water pump and a heat exchanger. Both the circulating water pump and the heat exchanger are fixedly installed on the outer side wall of the cooling box, and the heat exchanger is located above the circulating water pump. The water inlet of the circulating water pump is connected to the inner cavity of the cooling box through a water inlet pipe, and the water outlet of the circulating water pump is connected to the water inlet of the heat exchanger through a water outlet pipe. The water outlet of the heat exchanger is connected to one end of a drain pipe, and the other end of the drain pipe extends out above the inner cavity of the cooling box.

[0009] Preferably, both the water outlet pipe and the water drain pipe are fixedly connected to the outer side wall of the cooling box via a support base.

[0010] Preferably, a filter screen is fixedly installed inside the cooling box at the outer periphery of the water pump port, and the filter screen is fixedly connected to the inner wall of the cooling box.

[0011] Preferably, an inlet pipe and an outlet pipe are respectively provided on the front and rear side walls of the cooling box. The inlet pipe is located at the top of the cooling box, and the outlet pipe is located at the bottom of the cooling box. Both the inlet pipe and the outlet pipe are equipped with solenoid valves.

[0012] Preferably, the deoxygenation purifier has an air inlet pipe on one side and an output pipe on the other side. The outlet of the output pipe is connected to the air inlet of the delivery pipe through a connecting pipe, and both ends of the connecting pipe are connected to the outlet of the output pipe and the air inlet of the delivery pipe through flanges.

[0013] Preferably, the delivery pipe has a serpentine pipe structure.

[0014] Preferably, the connection between the outer wall of the conveying pipe and the side wall of the cooling box is a sealed connection.

[0015] The advantages of this application compared to existing technologies are:

[0016] 1. By installing an ultrasonic descaling device at the bottom of the cooling tank, ultrasonic energy is used to propagate in the coolant, causing impurities and scale on the outer wall of the delivery pipe to be broken and removed. This prevents long-term accumulation of impurities in the coolant, ensures good heat transfer on the pipe surface, and extends the service life of the equipment.

[0017] 2. The heat exchange device uses a combination of a circulating water pump and a heat exchanger, so that the coolant can be efficiently and circulated back to the cooling tank after being cooled by the heat exchange device, thereby improving the energy conversion efficiency and operational stability of the overall system.

[0018] 3. The delivery pipe adopts a serpentine pipe structure, which can further increase the contact area with the coolant, improve the cooling efficiency, and at the same time reduce the impact of local temperature difference on the nitrogen cooling effect. Attached Figure Description

[0019] Figure 1 This is a perspective view of a nitrogen purification cooling apparatus according to an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the internal structure of a cooling device for nitrogen purification according to an embodiment of this application.

[0021] Figure 3 This is a side view of a cooling apparatus for nitrogen purification according to an embodiment of this application.

[0022] Reference numerals in the attached diagram: 1. Deoxygenation purifier; 2. Cooling box; 3. Delivery pipe; 4. Support cover; 5. Ultrasonic generator; 6. Ultrasonic transducer; 7. Vibrating surface steel plate; 8. Circulating water pump; 9. Heat exchanger; 10. Pumping pipe; 11. Outlet pipe; 12. Drain pipe; 13. Filter screen; 14. Liquid inlet pipe; 15. Liquid outlet pipe; 16. Solenoid valve; 17. Air inlet pipe; 18. Output pipe; 19. Connecting pipeline. Detailed Implementation

[0023] To make the content of this application easier to understand, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the accompanying drawings. Figure 2 In the context of direction, the terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] like Figures 1-3 As shown, a nitrogen purification cooling device includes a deoxygenator 1 and a nitrogen cooling device. The outlet of the deoxygenator 1 is connected to the inlet of the nitrogen cooling device. The deoxygenator 1 uses carbon carrying a catalyst to convert oxygen in nitrogen into carbon dioxide at a lower temperature, and then removes the carbon dioxide to obtain high-purity nitrogen. The high-purity nitrogen is directly transported to the nitrogen cooling device for cooling through a pipeline system, realizing the connection between continuous purification and cooling. An inlet pipe 17 is provided on one side of the deoxygenator 1 and an outlet pipe 18 is provided on the other side. The nitrogen cooling device includes a cooling box 2, a delivery pipe 3, an ultrasonic descaling device, and a heat exchange device. The delivery pipe 3 is fixed inside the cooling box 2 and has a serpentine pipe structure. The serpentine pipe design allows the delivery pipe 3 to connect with the coolant. With a larger contact area, cooling efficiency is improved, achieving efficient cooling while ensuring smooth nitrogen flow and reducing temperature control problems caused by large local temperature differences. Cooling tank 2 is filled with coolant, and delivery pipe 3 is completely immersed in the coolant. In addition, the connection between the outer wall of delivery pipe 3 and the side wall of cooling tank 2 is sealed by welding. The inlet and outlet of delivery pipe 3 pass through the left and right side walls of cooling tank 2, respectively. The inlet of delivery pipe 3 is connected to the outlet of output pipe 18 on deoxygenator 1 through connecting pipe 19. The outlet of delivery pipe 3 outputs cooled high-purity nitrogen. Both ends of connecting pipe 19 are connected to the outlet of output pipe 18 and the inlet of delivery pipe 3 through flanges, providing reliable sealing and fixing effect, preventing leakage, and facilitating the disassembly and assembly of each module.

[0025] An ultrasonic descaling device is installed at the bottom of the cooling tank 2. The ultrasonic descaling device includes a support cover 4, an ultrasonic generator 5, and ultrasonic transducers 6. The support cover 4 is fixedly installed at the bottom of the cooling tank 2. The ultrasonic generator 5 is installed inside the support cover 4 and is externally powered. Multiple ultrasonic transducers 6 are installed on the outer bottom surface of the cooling tank 2 inside the support cover 4. Each ultrasonic transducer 6 is electrically connected to the ultrasonic generator 5. In practice, the high-frequency oscillation signal emitted by the ultrasonic generator 5 is converted into high-frequency mechanical oscillation by the ultrasonic transducers 6, generating ultrasonic vibrations in the coolant. The ultrasonic descaling device can promptly break up and remove impurities and scale adhering to the outer wall of the conveying pipe 3, thereby preventing long-term accumulation of impurities in the coolant, ensuring good heat transfer on the pipe surface, and extending the service life of the equipment. In addition, the outer bottom surface of the cooling box 2 is set as a vibrating steel plate 7, which is conducive to better transmitting ultrasonic vibration to the coolant, further enhancing the cleaning effect of the ultrasonic descaling device and ensuring that impurities are quickly broken up and removed. Heat exchange devices are fixedly installed on both the left and right side walls of the cooling box 2, and the coolant in the cooling box 2 can flow back into the inner cavity of the cooling box 2 after being cooled by the heat exchange devices.

[0026] Specifically, the heat exchange device includes a circulating water pump 8 and a heat exchanger 9. Both the circulating water pump 8 and the heat exchanger 9 are fixedly installed on the outer side wall of the cooling box 2, with the heat exchanger 9 positioned above the circulating water pump 8. The inlet of the circulating water pump 8 is connected to the inner cavity of the cooling box 2 via a pumping pipe 10, and the outlet of the circulating water pump 8 is connected to the inlet of the heat exchanger 9 via an outlet pipe 11. The outlet of the heat exchanger 9 is connected to one end of a drain pipe 12, with the other end of the drain pipe 12 extending above the inner cavity of the cooling box 2. Both the outlet pipe 11 and the drain pipe 12 are fixedly connected to the outer side wall of the cooling box 2 via support bases to ensure stable pipeline connection. In practice, the circulating water pump 8 extracts the coolant from the cooling box 2 after absorbing the heat of nitrogen through the pumping pipe 10 and flows it into the heat exchanger 9 through the outlet pipe 11 for cooling. The cooled liquid is then discharged into the cooling tank 2 through the discharge pipe, where it continues to exert its cooling effect before circulating back into the cooling tank 2. Inside the cooling tank 2, a filter screen 13 is fixedly installed on the outer periphery of the water pump 10 port. The filter screen 13 is fixedly connected to the inner wall of the cooling tank 2. This design can prevent scale broken by the ultrasonic descaling device from entering the water pump 10, and the ultrasonic descaling device can also break up the scale on the filter screen 13 to prevent it from clogging. In addition, an inlet pipe 14 and a drain pipe 15 are respectively installed on the front and rear side walls of the cooling tank 2. The inlet pipe 14 is located at the top of the cooling tank 2, and the drain pipe 15 is located at the bottom of the cooling tank 2. Solenoid valves 16 are installed on both the inlet pipe 14 and the drain pipe 15 to ensure a stable supply and discharge of coolant.

[0027] The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, without departing from the spirit and scope defined by the claims of this application.

Claims

1. A cooling device for nitrogen purification, comprising a deoxygenation purifier (1) and a nitrogen cooling device, characterized in that, The outlet of the deoxygenation purifier (1) is connected to the inlet of the nitrogen cooling device. The deoxygenation purifier (1) is used to convert oxygen in nitrogen into carbon dioxide and then remove the carbon dioxide to obtain high-purity nitrogen. The nitrogen cooling device is used to cool the purified nitrogen. The nitrogen cooling device includes a cooling box (2), a delivery pipe (3), an ultrasonic descaling device, and a heat exchange device. The delivery pipe (3) is fixed inside the cooling box (2), and the inlet and outlet of the delivery pipe (3) pass through the left and right side walls of the cooling box (2), respectively. The air inlet is connected to the air outlet of the deoxygenation purifier (1). The air outlet of the conveying pipe (3) outputs cooled high-purity nitrogen. An ultrasonic descaling device is installed at the bottom of the cooling box (2). Cooling liquid is placed in the inner cavity of the cooling box (2). The ultrasonic descaling device can break down and remove impurities and scale on the outer wall of the conveying pipe (3) by transmitting ultrasonic waves in the cooling liquid. Heat exchange devices are fixedly installed on both the left and right side walls of the cooling box (2). The cooling liquid in the cooling box (2) can flow back into the inner cavity of the cooling box (2) after being cooled by the heat exchange device.

2. The cooling device for purifying nitrogen according to claim 1, wherein The ultrasonic descaling device includes a support cover (4), an ultrasonic generator (5), and an ultrasonic transducer (6). The support cover (4) is fixedly installed at the bottom of the cooling box (2). The ultrasonic generator (5) is installed inside the support cover (4). The ultrasonic generator (5) is connected to an external power source. Multiple ultrasonic transducers (6) are installed on the bottom surface of the cooling box (2) inside the support cover (4). Each ultrasonic transducer (6) is electrically connected to the ultrasonic generator (5).

3. The cooling device for purifying nitrogen according to claim 2, wherein The outer bottom surface of the cooling box (2) is set as a vibrating steel plate (7).

4. The cooling device for purifying nitrogen according to claim 1, wherein The heat exchange device includes a circulating water pump (8) and a heat exchanger (9). The circulating water pump (8) and the heat exchanger (9) are both fixedly installed on the outer side wall of the cooling box (2). The heat exchanger (9) is located above the circulating water pump (8). The water inlet of the circulating water pump (8) is connected to the inner cavity of the cooling box (2) through a water inlet pipe (10). The water outlet of the circulating water pump (8) is connected to the water inlet of the heat exchanger (9) through a water outlet pipe (11). The water outlet of the heat exchanger (9) is connected to one end of a drain pipe (12). The other end of the drain pipe (12) extends above the inner cavity of the cooling box (2).

5. The cooling device for purifying nitrogen according to claim 4, wherein Both the outlet pipe and the drain pipe (12) are fixedly connected to the outer side wall of the cooling box (2) via a support base.

6. The cooling device for purifying nitrogen according to claim 4, wherein A filter screen (13) is fixedly installed inside the cooling box (2) at the outer periphery of the water pump (10) port, and the filter screen (13) is fixedly connected to the inner wall of the cooling box (2).

7. The cooling device for purifying nitrogen according to claim 1, wherein The cooling box (2) is provided with an inlet pipe (14) and an outlet pipe (15) on its front and rear outer side walls, respectively. The inlet pipe (14) is located at the top of the cooling box (2), and the outlet pipe (15) is located at the bottom of the cooling box (2). Solenoid valves (16) are installed on both the inlet pipe (14) and the outlet pipe (15).

8. The cooling device for purifying nitrogen according to claim 1, wherein The deoxygenation purifier (1) has an inlet pipe (17) on one side and an outlet pipe (18) on the other side. The outlet of the outlet pipe (18) is connected to the inlet of the delivery pipe (3) through a connecting pipe (19). Both ends of the connecting pipe (19) are connected to the outlet of the outlet pipe (18) and the inlet of the delivery pipe (3) through flanges.

9. The cooling device for purifying nitrogen according to claim 1, wherein The delivery pipe (3) has a serpentine pipe structure.

10. A cooling device for nitrogen purification according to claim 1, characterized in that, The connection between the outer wall of the conveying pipe (3) and the side wall of the cooling box (2) is a sealed connection.

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