A liquid nitrogen cold energy recovery system

Abstract

This invention provides a liquid nitrogen cold energy recovery system, solving the technical problem of waste caused by the release of cold energy during the vaporization process of liquid nitrogen. The liquid nitrogen cold energy recovery system includes: a liquid nitrogen tank with a first discharge pipe; a cold energy recovery tank with a first receiving cavity, the cold energy recovery tank including a second discharge pipe, a first jet assembly, a second jet assembly, a first vent pipe, and a second vent pipe, the first jet assembly being located at the top of the cold energy recovery tank, and the second jet assembly being located on the inner side of the cold energy recovery tank; a vaporizer connected to the first discharge pipe, the vaporizer being located in the first receiving cavity; a first heat tracing sleeve fitted outside the first discharge pipe; and a second heat tracing sleeve fitted outside the first heat tracing sleeve, enabling the effective recovery and utilization of the large amount of cold energy released during the vaporization process of liquid nitrogen, reducing energy waste and improving the overall system energy efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen cold energy recovery technology, and more specifically, to a liquid nitrogen cold energy recovery system. Background Technology

[0002] Liquid nitrogen, as a highly efficient coolant, is widely used in various industrial sectors, including semiconductor manufacturing, food freezing, and medical equipment cooling. However, liquid nitrogen rapidly vaporizes during use, releasing a significant amount of cooling energy. Wasting this cooling energy increases overall energy consumption, contradicting the principles of sustainable development. Furthermore, frequent replenishment of liquid nitrogen increases operating costs for businesses, especially in large-scale industrial applications where this cost is substantial. Excessive energy consumption not only increases the economic burden on enterprises but also exacerbates greenhouse gas emissions, negatively impacting the environment. Utility Model Content

[0003] The purpose of this invention is to provide a liquid nitrogen cold energy recovery system to solve the technical problem of waste caused by the release of cold energy during the current liquid nitrogen vaporization process.

[0004] This utility model is achieved through the following technical solution:

[0005] A liquid nitrogen cooling capacity recovery system includes a liquid nitrogen tank, a cooling capacity recovery tank, a vaporizer, a first heat tracing sleeve, and a second heat tracing sleeve;

[0006] The liquid nitrogen tank is equipped with a first discharge pipe;

[0007] The cold energy recovery tank is provided with a first receiving cavity. The cold energy recovery tank includes a second discharge pipe, a first jet assembly, a second jet assembly, a first air outlet pipe, and a second air outlet pipe. The first jet assembly is located at the top of the cold energy recovery tank, and the second jet assembly is located on the inner side of the cold energy recovery tank.

[0008] The vaporizer is connected to the first discharge pipe and is disposed in the first receiving cavity;

[0009] The first heat tracing sleeve is fitted over the first discharge pipe;

[0010] The second heat tracing sleeve is fitted over the first heat tracing sleeve.

[0011] In some embodiments, the second jet assembly is connected to a hot gas source.

[0012] In some embodiments, the second vent pipe is connected to the second heat tracing sleeve.

[0013] In some embodiments, the second discharge pipe is connected to the first heat tracing sleeve.

[0014] In some embodiments, the second discharge pipe is equipped with a temperature detector.

[0015] In some embodiments, the cold energy recovery tank is provided with an insulation layer.

[0016] In some embodiments, the outer wall of the vaporizer is coated with a waterproof layer.

[0017] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0018] (1) This utility model, through the design of liquid nitrogen tank and cold energy recovery tank, enables the large amount of cold energy released by liquid nitrogen during vaporization to be effectively recovered and utilized, reducing energy waste and improving the overall system energy efficiency.

[0019] (2) The first heat tracing sleeve and the second heat tracing sleeve of this utility model provide additional cold compensation for the process of liquid nitrogen from the liquid nitrogen tank to the vaporizer. The bottom of the cold recovery tank is connected to the first heat tracing sleeve. The recovered condensate flows back to the first heat tracing sleeve to heat the first discharge pipe and reduce the waste of cold energy.

[0020] (3) The second jet assembly of this utility model is connected to a hot gas source, which can provide hot gas to the cold energy recovery tank, prevent the outer wall from freezing during the vaporization process of liquid nitrogen, and promote the internal gas flow. The cold gas after the action can enter the second heat tracing sleeve through the second gas outlet pipe to further recover and utilize the cold energy it carries, realize the recycling of energy, and improve economic efficiency.

[0021] (4) The temperature detector installed on the second discharge pipe of this utility model can monitor the temperature change of liquid nitrogen or gas in real time, provide accurate data support for operators, facilitate timely adjustment of system parameters, and ensure the safety and reliability of system operation.

[0022] (5) The insulation layer on the outside of the cold energy recovery tank of this utility model effectively isolates the influence of the external environment on the temperature inside the tank, reduces the loss of cold energy, and ensures the effect of cold energy recovery.

[0023] (6) The waterproof coating on the outer wall of the vaporizer not only increases the service life of the equipment, but also prevents the safety hazards caused by water vapor intrusion, and improves the safety and stability of the system. Furthermore, while the vaporizer releases a large amount of cold energy during the vaporization process, it will form condensate on the outer wall. The waterproof coating can reduce water adhesion and increase the efficiency of condensate recovery. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the internal structure of the liquid nitrogen cooling capacity recovery system provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the liquid nitrogen cooling capacity recovery system provided in this embodiment of the utility model;

[0027] icon:

[0028] 100. Liquid nitrogen tank;

[0029] 200. Cold energy recovery tank; 210. Second discharge pipe; 220. First jet assembly; 230. Second jet assembly; 240. First air outlet pipe; 250. Second air outlet pipe; 260. Temperature detector;

[0030] 300. Carburetor;

[0031] 400. First heat tracing sleeve;

[0032] 500. Second heat tracing sleeve;

[0033] 600. Condensate inlet secondary pipe. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Example 1

[0036] This utility model provides a liquid nitrogen cooling energy recovery system to recover and utilize the cooling energy released by liquid nitrogen.

[0037] Please see Figure 1 as well as Figure 2 The liquid nitrogen cold energy recovery system provided in this embodiment of the utility model includes a liquid nitrogen tank 100, a cold energy recovery tank 200, a vaporizer 300, a first heat tracing sleeve 400, and a second heat tracing sleeve 500.

[0038] In this embodiment, the liquid nitrogen tank 100 is equipped with a first discharge pipe for storing liquid nitrogen;

[0039] In this embodiment, the cold energy recovery tank 200 is provided with a first receiving cavity. The cold energy recovery tank 200 includes a second discharge pipe 210, a first jet assembly 220, a second jet assembly 230, a first air outlet pipe 240, and a second air outlet pipe 250. The first jet assembly 220 is located at the top of the cold energy recovery tank 200, and the second jet assembly 230 is located on the inner side of the cold energy recovery tank 200. The first jet assembly 220 introduces external air, which facilitates the interaction between the cold energy in the cold energy recovery tank 200 and the air to condense the air into condensate water, thereby recovering the cold energy. The first air outlet pipe 240 is connected to the cold air recovery tank to recover the cold air, which facilitates the utilization of the cold energy. The second discharge pipe 210 realizes the return and recovery of condensate water, and the second air outlet pipe 250 realizes the return and recovery of cold air. In this embodiment, the first air outlet pipe 240 and the second air outlet pipe 250 are provided with valves.

[0040] In this embodiment, the vaporizer 300 is connected to the first discharge pipe and is disposed in the first receiving cavity. The second jet assembly 230 provides hot air, which acts on the outer wall of the vaporizer 300 to prevent the outer wall of the vaporizer 300 from freezing. The first jet assembly 220 blows the condensate on the outer wall of the vaporizer 300 to promote the condensate to flow down to the second discharge pipe 210 of the cold energy recovery tank 200. In this embodiment, the second discharge pipe 210 is equipped with a valve. In this embodiment, the second discharge pipe 210 is connected to a condensate inlet branch pipe 600 to supplement the condensate. The condensate inlet branch pipe 600 is equipped with a valve.

[0041] In this embodiment, the first heat tracing sleeve 400 is sleeved outside the first discharge pipe, which can reduce the loss of cold energy from the first discharge pipe;

[0042] In this embodiment, the second heat tracing sleeve 500 is sleeved outside the first heat tracing sleeve 400, which can further reduce the loss of cold energy from the first discharge pipe.

[0043] In this embodiment, the second jet assembly 230 is connected to a hot gas source, which can provide hot gas to the cold energy recovery tank 200 to prevent the outer wall from freezing during the vaporization process of liquid nitrogen. It can also promote the internal gas flow and form cold gas after the action. The cold gas can enter the second heat tracing sleeve 500 through the second gas outlet pipe 250 to further recover and utilize the cold energy it carries, realize the recycling of energy, and improve economic efficiency.

[0044] In this embodiment, the second air outlet pipe 250 is connected to the second heat tracing sleeve 500 to utilize the recovered cold air before collecting it. The second heat tracing sleeve 500 is provided with an air outlet, which is connected to the cold air recovery tank through a first connecting pipe. The first connecting pipe is provided with a valve.

[0045] In this embodiment, the second discharge pipe 210 is connected to the first heat tracing sleeve 400. Since the discharge from the second discharge pipe 210 is condensate from the cold energy recovery tank 200, the condensate flows back to the first heat tracing sleeve 400. The first heat tracing sleeve 400 is located outside the first discharge pipe, meaning the temperature of the first heat tracing sleeve 400 is higher than that of the first discharge pipe. The first heat tracing sleeve 400 exchanges temperature with the first discharge pipe. On the one hand, this can raise the temperature of liquid nitrogen to a certain extent, reducing the energy consumption of vaporizer 300. On the other hand, the first heat tracing sleeve 400 is provided with a water outlet, which is connected to the condensate recovery tank. The condensate can then be used on other working equipment, reducing the amount of condensate from electric refrigeration and reducing energy consumption. The water outlet is connected to the condensate recovery tank through a second connecting pipe, which is equipped with a valve.

[0046] In this embodiment, the second discharge pipe 210 is equipped with a temperature detector 260 to monitor the temperature changes of liquid nitrogen or gas in real time.

[0047] In this embodiment, the outer wall of the vaporizer 300 is coated with a waterproof layer, which increases the service life of the equipment, prevents safety hazards caused by water vapor intrusion, and improves the safety and stability of the system. Furthermore, while the vaporizer 300 releases a large amount of cold energy during the vaporization process, it will form condensate on the outer wall surface. The waterproof coating can reduce water adhesion and increase the efficiency of condensate recovery.

[0048] The following is a detailed description of the usage process of the liquid nitrogen cooling capacity recovery system in Embodiment 1 of this utility model:

[0049] Liquid nitrogen is transferred from liquid nitrogen tank 100 to vaporizer 300 through a first discharge pipe. A first heat tracing sleeve 400 is fitted over the first discharge pipe to reduce cold loss during transfer. A second heat tracing sleeve 500 is further fitted over the first heat tracing sleeve 400, providing double protection to ensure stable temperature and reduce cold loss during transfer. Vaporizer 300 is connected to the first discharge pipe and located in the first receiving cavity of cold recovery tank 200. After entering vaporizer 300, liquid nitrogen begins to absorb heat vapor. The vaporizer 300 releases a large amount of cooling energy. The second jet assembly 230 is connected to a hot gas source to provide hot gas into the cooling energy recovery tank 200. This hot gas acts on the outer wall of the vaporizer 300 to prevent icing and promotes the vaporization process of liquid nitrogen. The first jet assembly 220 is located at the top of the cooling energy recovery tank 200 to introduce external air. This air interacts with the cooling energy in the cooling energy recovery tank 200 to form condensate. The first jet assembly 220 also blows the condensate on the outer wall of the vaporizer 300 to promote condensation. The condensate flows down to the second discharge pipe 210 of the cold energy recovery tank 200. The second discharge pipe 210 is connected to the first heat tracing sleeve 400, returning the condensate in the cold energy recovery tank 200 to the first heat tracing sleeve 400. Since the temperature of the first heat tracing sleeve 400 is higher than that of the first discharge pipe, the condensate exchanges temperature with the first discharge pipe. On the one hand, this can preheat the liquid nitrogen to a certain extent, reducing the energy consumption of the vaporizer 300. On the other hand, the first heat tracing sleeve 400 is provided with a water outlet, which is connected to the condensate recovery... The condensate can be reused in other working equipment, reducing the amount of condensate from electric refrigeration and saving energy. The second discharge pipe 210 is equipped with a temperature detector 260 to monitor the temperature changes of liquid nitrogen or gas in real time, ensuring the stable operation of the system. The first gas outlet pipe 240 is connected to the cold gas recovery tank to recover and reuse the cold gas. The second gas outlet pipe 250 is connected to the second heat tracing sleeve 500 to further utilize the recovered cold gas before collecting it. The second heat tracing sleeve 500 is equipped with a gas outlet, which is connected to the cold gas recovery tank to realize the recycling of cold energy.

[0050] Example 2

[0051] This utility model provides a liquid nitrogen cooling energy recovery system to recover and utilize the cooling energy released by liquid nitrogen.

[0052] The liquid nitrogen cold energy recovery system provided in Embodiment 2 of this utility model differs from Embodiment 1 only in that, in this embodiment, the cold energy recovery tank 200 is provided with an insulation layer, which effectively isolates the influence of the external environment on the temperature inside the tank, reduces cold energy loss, and ensures the effect of cold energy recovery.

[0053] The embodiments of this utility model have at least the following advantages:

[0054] (1) This utility model, through the design of liquid nitrogen tank and cold energy recovery tank, enables the large amount of cold energy released by liquid nitrogen during vaporization to be effectively recovered and utilized, reducing energy waste and improving the overall system energy efficiency.

[0055] (2) The first heat tracing sleeve and the second heat tracing sleeve of this utility model provide additional cold compensation for the process of liquid nitrogen from the liquid nitrogen tank to the vaporizer. The bottom of the cold recovery tank is connected to the first heat tracing sleeve. The recovered condensate flows back to the first heat tracing sleeve to heat the first discharge pipe and reduce the waste of cold energy.

[0056] (3) The second jet assembly of this utility model is connected to a hot gas source, which can provide hot gas to the cold energy recovery tank, prevent the outer wall from freezing during the vaporization process of liquid nitrogen, and promote the internal gas flow. The cold gas after the action can enter the second heat tracing sleeve through the second gas outlet pipe to further recover and utilize the cold energy it carries, realize the recycling of energy, and improve economic efficiency.

[0057] (4) The temperature detector installed on the second discharge pipe of this utility model can monitor the temperature change of liquid nitrogen or gas in real time, provide accurate data support for operators, facilitate timely adjustment of system parameters, and ensure the safety and reliability of system operation.

[0058] (5) The insulation layer on the outside of the cold energy recovery tank of this utility model effectively isolates the influence of the external environment on the temperature inside the tank, reduces the loss of cold energy, and ensures the effect of cold energy recovery.

[0059] (6) The waterproof coating on the outer wall of the vaporizer not only increases the service life of the equipment, but also prevents the safety hazards caused by water vapor intrusion, and improves the safety and stability of the system. Furthermore, while the vaporizer releases a large amount of cold energy during the vaporization process, it will form condensate on the outer wall. The waterproof coating can reduce water adhesion and increase the efficiency of condensate recovery.

[0060] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid nitrogen cold recovery system, characterized by, include: The liquid nitrogen tank is equipped with a first discharge pipe; A cold energy recovery tank is provided with a first receiving cavity. The cold energy recovery tank includes a second discharge pipe, a first jet assembly, a second jet assembly, a first air outlet pipe, and a second air outlet pipe. The first jet assembly is located at the top of the cold energy recovery tank, and the second jet assembly is located on the inner side of the cold energy recovery tank. A vaporizer is connected to the first discharge pipe and is disposed in the first receiving cavity; The first heat tracing sleeve is fitted over the first discharge pipe; The second heat tracing sleeve is fitted over the first heat tracing sleeve.

2. The liquid nitrogen cold recovery system of claim 1, wherein, The second jet assembly is connected to a hot gas source.

3. The liquid nitrogen cold recovery system of claim 1, wherein, The second vent pipe is connected to the second heat tracing sleeve.

4. The liquid nitrogen cold energy recovery system according to any one of claims 1 to 3, characterized by, The second discharge pipe is connected to the first heat tracing sleeve.

5. The liquid nitrogen cold energy recovery system according to any one of claims 1 to 3, characterized by, The second discharge pipe is equipped with a temperature detector.

6. The liquid nitrogen cold energy recovery system according to any one of claims 1 to 3, characterized by, The cold energy recovery tank is equipped with an insulation layer.

7. The liquid nitrogen cold energy recovery system according to any one of claims 1 to 3, characterized by, The outer wall of the vaporizer is coated with a waterproof layer.

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