Hollow fiber membrane nitrogen making machine

Abstract

The utility model belongs to the technical field of nitrogen making machines, and discloses a hollow fiber membrane nitrogen making machine which comprises a storage tank and a separation tank, a first electromagnetic valve is installed at the top end of the storage tank, a first hollow fiber membrane is fixedly connected to the upper portion of the inner wall of the storage tank, and a second electromagnetic valve and a third electromagnetic valve are installed at the two ends of the separation tank respectively. According to the scheme, nitrogen and oxygen separation can be carried out on external air, oxygen in the storage tank is continuously replaced with separated nitrogen, a nitrogen-rich space in the storage tank is created, meanwhile, it is guaranteed that the air pressure in the storage tank is balanced with the outside, and the storage tank can be used for storing nitrogen in the storage tank. The storage tank can be used for storing articles suitable for being stored in a nitrogen-rich space, meanwhile, long-term storage of the articles cannot be affected due to too low air pressure, through arrangement of a conveying pipe and a heating pipe, the separation efficiency can be improved by heating air, it can be guaranteed that separated nitrogen enters the storage tank after being cooled, and the nitrogen storage effect is improved. And the temperature change in the storage tank is avoided.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen generator technology, and in particular to a hollow fiber membrane nitrogen generator. Background Technology

[0002] A hollow fiber membrane nitrogen generator is a device that uses hollow fiber membrane technology to separate nitrogen gas. It is commonly used in industrial production to produce high-purity nitrogen by separating nitrogen from oxygen and other gases in the air. The working principle of a hollow fiber membrane nitrogen generator is based on the difference in permeability of the hollow fiber membrane under different pressures to achieve nitrogen separation. This equipment is commonly used in various fields, such as chemical, electronics, and food processing industries, where high-purity nitrogen is required.

[0003] A search of Chinese utility model patent (publication number CN214593964U) reveals a circulating nitrogen generator for a fruit controlled atmosphere storage facility. By circulating and purifying the air in the storage facility, oxygen and nitrogen are separated. Oxygen is discharged from the storage facility, while nitrogen is refilled, thereby achieving the purpose of deoxygenation and nitrogen increase. This effectively inhibits the respiration of fruits and vegetables in the storage facility, achieving a long-term preservation effect.

[0004] However, practical application has revealed that this technical solution still has at least the following drawbacks:

[0005] This method involves extracting air from the storage room, separating nitrogen and oxygen, and then transporting the separated nitrogen back into the storage room. Although this can create a nitrogen-rich environment inside the storage room, the removal of oxygen from the air causes a drop in air pressure, which may accelerate the spoilage of the fruit. Utility Model Content

[0006] This invention aims to provide a hollow fiber membrane nitrogen generator to solve the problems mentioned in the background art. This solution can separate nitrogen and oxygen from the outside air and continuously replace the oxygen in the storage tank with the separated nitrogen to create a nitrogen-rich space inside the storage tank. At the same time, it ensures that the air pressure inside the storage tank is balanced with the outside air, so that the storage tank can be used to store items suitable for preservation in a nitrogen-rich space. At the same time, it will not affect the long-term storage of items due to low air pressure. By setting up the delivery pipe and heating pipe, the separation efficiency can be improved by heating the air, and the separated nitrogen can be cooled before entering the storage tank, avoiding temperature changes inside the storage tank.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A hollow fiber membrane nitrogen generator includes a storage tank and a separation tank. A first solenoid valve is installed at the top of the storage tank, and a first hollow fiber membrane is fixedly connected to the upper part of the inner wall of the storage tank. A second solenoid valve and a third solenoid valve are respectively installed at both ends of the separation tank. An air pump connected to the second solenoid valve is installed. A second hollow fiber membrane is fixedly connected to the side of the inner wall of the separation tank near the third solenoid valve. A fourth solenoid valve is installed at the outer end of the separation tank, and a delivery pipe is connected to the fourth solenoid valve. The end of the delivery pipe away from the fourth solenoid valve is connected to the inner cavity of the storage tank.

[0009] Preferably, the storage tank is equipped with a pressure monitoring instrument.

[0010] Preferably, the inner wall of the separation tank is equipped with a plurality of heating tubes, which are arranged around the inner cavity of the separation tank.

[0011] Preferably, the material of the conveying pipe is copper.

[0012] Preferably, the delivery pipe is configured with a serpentine structure.

[0013] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0014] This solution separates nitrogen and oxygen from the outside air and continuously replaces the oxygen in the storage tank with the separated nitrogen, creating a nitrogen-rich space inside the tank. At the same time, it ensures that the air pressure inside the storage tank is balanced with the outside air, allowing the storage tank to be used to store items suitable for preservation in a nitrogen-rich space. This also prevents the long-term storage of items from being affected by excessively low air pressure. By setting up delivery pipes and heating pipes, the separation efficiency can be improved by heating the air, and the separated nitrogen can be cooled before entering the storage tank, avoiding temperature changes inside the storage tank. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of this utility model;

[0016] Figure 2 A schematic diagram of the internal structure of the storage tank provided by this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the separator provided by this utility model.

[0018] Reference numerals in the attached drawings: 1. Storage tank; 2. First solenoid valve; 3. First hollow fiber membrane; 4. Separation tank; 5. Air pump; 6. Second solenoid valve; 7. Second hollow fiber membrane; 8. Third solenoid valve; 9. Fourth solenoid valve; 10. Delivery pipe; 11. Heating pipe. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0020] like Figure 1-3 The hollow fiber membrane nitrogen generator shown includes a storage tank 1 and a separation tank 4. A first solenoid valve 2 is installed at the top of the storage tank 1, and a first hollow fiber membrane 3 is fixedly connected to the upper part of the inner wall of the storage tank 1. A second solenoid valve 6 and a third solenoid valve 8 are installed at both ends of the separation tank 4, respectively. An air pump 5 is installed on the second solenoid valve 6 and connected to it. A second hollow fiber membrane 7 is fixedly connected to the side of the inner wall of the separation tank 4 near the third solenoid valve 8. A fourth solenoid valve 9 is installed at the outer end of the separation tank 4, and a delivery pipe 10 is connected to the fourth solenoid valve 9. The end of the delivery pipe 10 away from the fourth solenoid valve 9 is connected to the inner cavity of the storage tank 1.

[0021] A hollow fiber membrane nitrogen generator is a device that uses hollow fiber membrane technology to separate nitrogen gas. It is commonly used in industrial production to produce high-purity nitrogen by separating nitrogen from oxygen and other gases in the air. The working principle of a hollow fiber membrane nitrogen generator is based on the difference in permeability of the hollow fiber membrane under different pressures to achieve nitrogen separation. This equipment is commonly used in various fields, such as chemical, electronics, and food processing industries, where high-purity nitrogen is required.

[0022] In this scheme, the user starts the air pump 5 and opens the second solenoid valve 6. The air pump 5 draws outside air into the separator 4. As the air pressure inside the separator 4 gradually increases, the user closes the air pump 5 and the second solenoid valve 6, and then opens the third solenoid valve 8. Under the action of air pressure, the oxygen inside the separator 4 passes through the second hollow fiber membrane 7 and is discharged through the third solenoid valve 8, while the nitrogen is retained inside the separator 4. Then, the user closes the third solenoid valve 8 and simultaneously opens the fourth solenoid valve 9 and the first solenoid valve 2. Under the action of air pressure, the nitrogen in the separator 4 flows into the delivery system through the fourth solenoid valve 9. The gas enters the storage tank 1 through the delivery pipe 10. At this time, the gas pressure in the storage tank 1 increases, and the oxygen in the storage tank 1 will be discharged from the storage tank 1 through the first hollow fiber membrane 3 and the first solenoid valve 2 until the gas pressure in the storage tank 1 returns to equilibrium. By repeating the above steps multiple times, the oxygen in the storage tank 1 can be continuously replaced with nitrogen to create a nitrogen-rich space inside the storage tank 1. At the same time, the gas pressure inside the storage tank 1 is kept in balance with the outside, so that the storage tank 1 can be used to store items that are suitable for storage in a nitrogen-rich space, and the long-term storage of items will not be affected by the low gas pressure.

[0023] Storage tank 1 is equipped with a pressure monitoring instrument.

[0024] In this solution, a differential pressure sensor or barometer can be installed on storage tank 1 to facilitate users in observing changes in air pressure inside storage tank 1.

[0025] Multiple heating tubes 11 are installed on the inner wall of the separation tank 4, and the heating tubes 11 are arranged around the inner cavity of the separation tank 4.

[0026] In this scheme, multiple heating tubes 11 can be used to heat the air entering the separation tank 4, improve the air permeability, help promote oxygen to pass through the second hollow fiber membrane 7, and improve the separation efficiency.

[0027] The material of the conveying pipe 10 is copper, and the conveying pipe 10 is designed with a serpentine structure.

[0028] In this design, the copper conveying pipe 10 has good thermal conductivity, which helps the nitrogen gas heated by the heating pipe 11 to dissipate heat quickly when it passes through the conveying pipe 10. The serpentine design of the conveying pipe 10 can increase the flow time of nitrogen in the conveying pipe 10, so that the nitrogen gas can be cooled before entering the storage tank 1, avoiding the adverse effects of temperature changes inside the storage tank 1 on the stored objects.

[0029] The specific implementation process is as follows:

[0030] In use, the user first starts the air pump 5 and opens the second solenoid valve 6. The air pump 5 draws outside air into the separator 4, and simultaneously activates the delivery pipe 10 to heat the air entering the separator 4. As the air pressure inside the separator 4 gradually increases, the user closes the air pump 5 and the second solenoid valve 6, then opens the third solenoid valve 8. Under the pressure, oxygen inside the separator 4 passes through the second hollow fiber membrane 7 and is discharged through the third solenoid valve 8, while nitrogen remains inside the separator 4. The user then closes the third solenoid valve 8 and simultaneously opens the fourth solenoid valve 9 and the first solenoid valve 2. Nitrogen gas in separator 4 is introduced into delivery pipe 10 through fourth solenoid valve 9 under pressure. As the nitrogen gas flows through delivery pipe 10, it cools down and then enters storage tank 1 through delivery pipe 10, causing the gas pressure in storage tank 1 to increase. Oxygen gas in storage tank 1 is discharged from storage tank 1 through first hollow fiber membrane 3 and first solenoid valve 2 under pressure until the gas pressure in storage tank 1 returns to equilibrium. By repeating the above steps, nitrogen gas can be continuously used to replace oxygen gas in storage tank 1, creating a nitrogen-rich space inside storage tank 1, while ensuring that the gas pressure inside storage tank 1 is balanced with the outside.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A hollow fiber membrane nitrogen generator characterized by: The utility model relates to a kind of gas separation and storage device, including storage tank (1) and separation tank (4), the first electromagnetic valve (2) is installed in the top end of the storage tank (1), and the upper portion of the inner wall of storage tank (1) is fixedly connected with first hollow fiber membrane (3), the second electromagnetic valve (6) and third electromagnetic valve (8) are respectively installed in the two ends of the separation tank (4), the gas pump (5) is installed on the second electromagnetic valve (6) and is communicated with it, the second hollow fiber membrane (7) is fixedly connected with the inner wall of separation tank (4) near third electromagnetic valve (8) side, the fourth electromagnetic valve (9) is installed in the outer end of the separation tank (4), the conveying pipe (10) is connected to the fourth electromagnetic valve (9), the inner cavity of storage tank (1) is communicated with the end of conveying pipe (10) away from fourth electromagnetic valve (9).

2. The hollow fiber membrane nitrogen generator of claim 1, wherein: The storage tank (1) is provided with a gas pressure monitoring instrument.

3. The hollow fiber membrane nitrogen generator of claim 1, wherein: A plurality of heating pipes (11) are installed on the inner wall of the separation tank (4), and the heating pipes (11) are arranged around the inner cavity of the separation tank (4).

4. The hollow fiber membrane nitrogen generator of claim 1, wherein: The material of the conveying pipe (10) is copper.

5. The hollow fiber membrane nitrogen generator of claim 4, wherein: The conveying pipe (10) is in a serpentine structure.

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