Pressure swing adsorption nitrogen making equipment

Abstract

The utility model provides pressure swing adsorption nitrogen making equipment, and belongs to the technical field of nitrogen making. Comprising a nitrogen making tank, the outside of the nitrogen making tank is connected with a refrigeration tank through a gas conveying steel pipe, a drying mechanism is arranged in the refrigeration tank and comprises a gas conveying pipe, the gas conveying pipe is externally connected to the outer surface of the refrigeration tank, one end of the gas conveying pipe extends into the refrigeration tank, and the other end of the gas conveying pipe extends into the refrigeration tank. The spiral conveying pipe is arranged in the refrigeration tank by being connected with the air conveying pipe, the U-shaped barrel is fixedly installed in the refrigeration tank, and the bottom end of the spiral conveying pipe is inserted into the lower end of the U-shaped barrel. The spiral conveying pipe is arranged in the refrigeration tank, the U-shaped barrel is further arranged in the refrigeration tank, air is conveyed into the spiral conveying pipe, the staying time of the air in the refrigeration tank is prolonged through internal conveying of the spiral conveying pipe, the air is fully dried in the refrigeration tank, meanwhile, the U-shaped barrel is arranged, the air can be further cooled and dried, and the refrigeration effect is improved. The use effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen production technology, and more specifically, to a pressure swing adsorption nitrogen production device. Background Technology

[0002] Nitrogen, as an inert gas, plays an irreplaceable role in industry and daily life due to its unique physical and chemical properties. Pressure swing adsorption (PSA) nitrogen generators are suitable for scenarios with "small to medium volume and medium purity" of nitrogen due to their fast gas production rate, moderate energy consumption, and controllable purity (99%-99.99%), such as nitrogen-filled packaging of bread and potato chips to extend shelf life, and nitrogen used to maintain a low-temperature environment during the transportation of meat and seafood.

[0003] In the process of nitrogen production, air is drawn into the compressor, then dried and impurities are removed, and finally it is delivered to the nitrogen generator. In the current operation, air drying is achieved by cooling the air. However, the air is delivered to the refrigeration tank for cooling and drying. Since the air naturally rises inside the refrigeration tank and is discharged through the exhaust pipe on the refrigeration tank, the air stays inside the refrigeration tank for a short time, which affects the air drying effect. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a pressure swing adsorption nitrogen generator that overcomes or at least partially solves the above technical problems.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a pressure swing adsorption nitrogen generation device, including a nitrogen generation tank, the outside of which is connected to a refrigeration tank via a gas transmission steel pipe, and the inside of the refrigeration tank is equipped with a drying mechanism;

[0007] The drying mechanism includes:

[0008] A gas supply pipe is connected to the outer surface of the refrigeration tank, and one end of the gas supply pipe extends into the interior of the refrigeration tank.

[0009] A spiral conveying pipe is installed inside the refrigeration tank via a connection to a gas conveying pipe.

[0010] The U-shaped cylinder is fixedly installed inside the refrigeration tank, and the bottom end of the spiral conveying pipe is inserted into the lower end of the U-shaped cylinder.

[0011] In a preferred embodiment, the interior of the refrigeration tank is further provided with a filtration mechanism, which includes a first filter screen plate, which is fixedly installed inside the upper end of the U-shaped cylinder.

[0012] In a preferred embodiment, the filtration mechanism is further provided with a second filter screen plate, which is fixedly installed below the first filter screen plate, and the aperture of the second filter screen plate is 5mm larger than that of the first filter screen plate.

[0013] In a preferred embodiment, an outlet pipe is fixedly installed on the top of the refrigeration tank, and a pipeline is also installed on the top of the refrigeration tank.

[0014] In a preferred embodiment, two nitrogen generators are provided, the gas outlet pipe is connected to the interior of one of the nitrogen generators, and the two nitrogen generators are connected to each other by a stainless steel pipe.

[0015] In a preferred embodiment, a slag discharge pipe is fixedly installed inside the refrigeration tank. One end of the slag discharge pipe is connected to the inside of the U-shaped cylinder, and the other end extends out of the bottom of the refrigeration tank. A control valve is installed on the slag discharge pipe at an external location of the refrigeration tank.

[0016] In a preferred embodiment, a limiting frame is fixedly installed on the inner wall of the refrigeration tank, and the limiting frame wraps around the outside of the spiral conveying pipe.

[0017] In a preferred embodiment, a support rod is fixedly installed inside the refrigeration tank, and one end of the support rod is fixedly connected to the bottom end of the U-shaped cylinder.

[0018] In a preferred embodiment, the nitrogen generator is connected to a nitrogen storage tank via an air inlet pipe, and the nitrogen storage tank is equipped with an exhaust pipe.

[0019] The pressure swing adsorption (PSA) nitrogen generator provided by this utility model has the following beneficial effects:

[0020] 1. By installing a spiral conveying pipe inside the refrigeration tank and a U-shaped cylinder inside the refrigeration tank, air is conveyed into the spiral conveying pipe and transported through the spiral conveying pipe, extending the residence time of the air in the refrigeration tank and allowing the air to be fully dried inside the refrigeration tank. At the same time, the U-shaped cylinder can further cool and dry the air, improving the performance.

[0021] 2. By installing a first filter screen and a second filter screen at the upper end of the U-shaped cylinder, respectively, the pore size of the first filter screen is smaller than that of the second filter screen, which can filter particles in the air and prevent air containing particles from entering the nitrogen generator and affecting the purity of the prepared nitrogen. Attached Figure Description

[0022] 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 of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the refrigeration tank of this utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of the refrigeration tank of this utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of the U-shaped cylinder of this utility model.

[0027] In the diagram: 1. Nitrogen generator; 2. Refrigeration tank; 3. Drying mechanism; 31. Gas delivery pipe; 32. Spiral conveying pipe; 33. U-shaped cylinder; 4. Filtration mechanism; 5. First filter screen; 6. Second filter screen; 7. Gas outlet pipe; 8. Stainless steel pipe; 9. Slag discharge pipe; 10. Control valve; 11. Pipeline; 12. Limiting frame; 13. Support rod; 14. Nitrogen storage tank; 15. Exhaust pipe. Detailed Implementation

[0028] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0029] Reference Figures 1-4This utility model provides a technical solution: a pressure swing adsorption (PSA) nitrogen generator, including a nitrogen generator tank 1. The outside of the nitrogen generator tank 1 is connected to a refrigeration tank 2 via a gas supply steel pipe. A drying mechanism 3 is installed inside the refrigeration tank 2 to dry the air supplied to the refrigeration tank 2, ensuring that the dried air is delivered to the nitrogen generator tank 1. There are two nitrogen generator tanks 1, designated as tank A and tank B. Nitrogen gas is produced by high-pressure oxygen absorption and low-pressure oxygen discharge in tanks A and B respectively. Under high pressure, oxygen is adsorbed by the carbon molecular sieve inside the tank, while nitrogen is not adsorbed, thus separating nitrogen and oxygen to produce nitrogen gas. The drying mechanism 3 includes a gas supply pipe 31. The gas pipe 31 is connected to the outer surface of the refrigeration tank 2. One end of the gas pipe 31 is located outside the refrigeration tank 2 and is used to connect to the outlet of the external compressor. It can dry the absorbed air. One end of the gas pipe 31 extends into the interior of the refrigeration tank 2. The spiral conveying pipe 32 is located inside the refrigeration tank 2 through the connection with the gas pipe 31. The U-shaped cylinder 33 is fixedly installed inside the refrigeration tank 2. The bottom end of the spiral conveying pipe 32 is inserted into the bottom end of the U-shaped cylinder 33. The spiral shape of the spiral conveying pipe 32 can extend the movement path of the air entering the spiral conveying pipe 32. The air stays in the refrigeration tank 2 for a longer time, which can fully dry the air.

[0030] Reference Figures 1-4 In a preferred embodiment, the interior of the refrigeration tank 2 is also provided with a filtration mechanism 4, which includes a first filter screen 5. The first filter screen 5 is fixedly installed inside the upper end of the U-shaped cylinder 33. This device can not only dry the air, but also remove impurities from the air particles during the air movement process, thereby improving the purity of the air and avoiding the need for subsequent nitrogen preparation.

[0031] Reference Figures 1-4 In a preferred embodiment, the filtration mechanism 4 is further provided with a second filter plate 6, which is fixedly installed below the first filter plate 5. The aperture of the second filter plate 6 is 5 mm larger than that of the first filter plate 5. This device is provided with two filter plates, with the first filter plate 5 positioned above the second filter plate 6, which allows for two-stage air filtration. Furthermore, the aperture of the first filter plate 5 is smaller than that of the second filter plate 6, which allows for the filtration of particles of different sizes in the air.

[0032] Reference Figures 1-4In a preferred embodiment, an exhaust pipe 7 is fixedly installed on the top of the refrigeration tank 2. A pipe 11 is also installed on the top of the refrigeration tank 2. The exhaust pipe 7 can deliver air to the nitrogen generator 1 for processing, while the pipe 11 is used for backflushing inside the refrigeration tank 2. When there are many impurities attached to the two filter screens, it will affect the filtration effect of the air. Therefore, the two filter screens are cleaned regularly. By connecting an external blower to the pipe 11 through an air pipe, the gas will blow into the refrigeration tank 2 and blow the first filter screen 5 and the second filter screen 6, blowing the impurities attached to the two filter screens and causing them to fall. A slag discharge pipe 9 is fixedly installed inside the refrigeration tank 2. One end of the slag discharge pipe 9 is connected to the inside of the U-shaped cylinder 33, and the other end extends out of the bottom of the refrigeration tank 2. A control valve 10 is installed on the slag discharge pipe 9 at the external position of the refrigeration tank 2. The impurities will fall into the inside of the slag discharge pipe 9. Then, by opening the control valve 10, the impurities can be discharged from the inside of the refrigeration tank 2.

[0033] Two nitrogen generators 1 are provided. The gas outlet pipe 7 is connected to the interior of one of the nitrogen generators 1. The two nitrogen generators 1 are connected to each other through a stainless steel pipe 8.

[0034] The equipment has a limiting frame 12 fixedly installed on the inner wall of the refrigeration tank 2, which wraps around the outside of the spiral conveying pipe 32. A support rod 13 is fixedly installed inside the refrigeration tank 2, with one end of the support rod 13 fixedly connected to the bottom end of the U-shaped cylinder 33. Both the limiting frame 12 and the support rod 13 are auxiliary limiting structures. The limiting frame 12 is used to limit the spiral conveying pipe 32, and the support rod 13 can support the U-shaped cylinder 33, so that the U-shaped cylinder 33 can be stably installed inside the refrigeration tank 2.

[0035] By connecting the nitrogen generator 1 to the nitrogen storage tank 14 through an air inlet pipe, and the nitrogen storage tank 14 is equipped with an exhaust pipe 15, nitrogen is generated by the nitrogen generator 1 and the generated nitrogen is transported into the nitrogen storage tank 14. A pressure gauge is installed on the nitrogen storage tank 14 to monitor the gas pressure inside the nitrogen storage tank 14 in real time to avoid danger and store the nitrogen inside the nitrogen storage tank 14 for later use.

[0036] Specifically, the working process or working principle of a pressure swing adsorption nitrogen generator is as follows: This setup can fully dry the air by extending the path of the air inside the refrigeration tank 2, thereby increasing the air cooling effect and fully drying the air, which facilitates the preparation of nitrogen from the air.

[0037] In practical use, the device is connected to an external power source. An external air compressor draws in and compresses the air, which is then delivered into the refrigeration tank 2. Although the air is dried before entering the refrigeration tank 2, there is still a possibility of temperature rise during the air delivery process. Therefore, to ensure that the air entering the nitrogen generator 1 is dry gas, the air is further dried inside the refrigeration tank 2.

[0038] Air enters the refrigeration tank 2 through the air supply pipe 31, and then enters the spiral conveying pipe 32. Due to the spiral design of the spiral conveying pipe 32, the air stays in the refrigeration tank 2 for a longer time, thus making the air fully dry inside the refrigeration tank 2.

[0039] Next, air passes through the spiral conveyor pipe 32 and enters the U-shaped cylinder 33. Under the continuous blowing of the spiral conveyor pipe 32, the air rises inside the U-shaped cylinder 33. At this time, the process of the air moving inside the U-shaped cylinder 33 further enhances the drying effect of the air.

[0040] As the air rises, it first passes through the second filter plate 6, which has a larger aperture to filter out large particles in the air. The air then rises through the second filter plate 6 to the first filter plate 5, which has a smaller aperture to filter out small particulate impurities in the air. Finally, the air is transported to the nitrogen generator 1 through the exhaust pipe 7.

[0041] Nitrogen gas is produced by using the principle of high-pressure oxygen absorption and low-pressure oxygen release inside the nitrogen generator 1. The produced nitrogen gas is then transported to the nitrogen storage tank 14 for storage.

Claims

1. A pressure swing adsorption (PSA) nitrogen generator, characterized in that, It includes a nitrogen generator (1), the outside of which is connected to a refrigeration tank (2) via a gas transmission steel pipe, and a drying mechanism (3) is installed inside the refrigeration tank (2). The drying mechanism (3) includes: Gas supply pipe (31), the gas supply pipe (31) is connected to the outer surface of the refrigeration tank (2), and one end of the gas supply pipe (31) extends into the interior of the refrigeration tank (2); A spiral conveying pipe (32) is installed inside the refrigeration tank (2) through a connection with a gas conveying pipe (31); The U-shaped cylinder (33) is fixedly installed inside the refrigeration tank (2), and the bottom end of the spiral conveying pipe (32) is inserted into the lower end of the U-shaped cylinder (33).

2. The pressure swing adsorption nitrogen generator according to claim 1, characterized in that, The refrigeration tank (2) is also equipped with a filter mechanism (4), which includes a first filter screen (5) and is fixedly installed inside the upper part of the U-shaped cylinder (33).

3. The pressure swing adsorption nitrogen generator according to claim 2, characterized in that, The filtering mechanism (4) is also provided with a second filter screen (6), which is fixedly installed below the first filter screen (5). The aperture of the second filter screen (6) is 5 mm larger than that of the first filter screen (5).

4. The pressure swing adsorption nitrogen generator according to claim 3, characterized in that, An outlet pipe (7) is fixedly installed on the top of the refrigeration tank (2), and a pipe (11) is also installed on the top of the refrigeration tank (2).

5. A pressure swing adsorption nitrogen generator according to claim 4, characterized in that, Two nitrogen generators (1) are provided. The gas outlet pipe (7) is connected to the interior of one of the nitrogen generators (1). The two nitrogen generators (1) are connected to each other through a stainless steel pipe (8).

6. The pressure swing adsorption nitrogen generator according to claim 5, characterized in that, The refrigeration tank (2) has a slag discharge pipe (9) fixedly installed inside. One end of the slag discharge pipe (9) is connected to the inside of the U-shaped cylinder (33), and the other end extends out of the bottom of the refrigeration tank (2). A control valve (10) is installed on the slag discharge pipe (9) at the outside of the refrigeration tank (2).

7. A pressure swing adsorption nitrogen generator according to claim 6, characterized in that, The inner wall of the refrigeration tank (2) is fixedly installed with a limiting frame (12), which wraps around the outside of the spiral conveying pipe (32).

8. A pressure swing adsorption nitrogen generator according to claim 7, characterized in that, The refrigeration tank (2) is internally fixedly installed with a support rod (13), one end of which is fixedly connected to the bottom end of the U-shaped cylinder (33).

9. A pressure swing adsorption nitrogen generator according to claim 8, characterized in that, The nitrogen generator (1) is connected to the nitrogen storage tank (14) via an air inlet pipe, and the nitrogen storage tank (14) is provided with an exhaust pipe (15).

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