VPSA (Vacuum Pressure Swing Adsorption) oxygen production device

Abstract

The utility model discloses a VPSA (Vacuum Pressure Swing Adsorption) oxygen production device, which comprises an adsorption tank, an air blower and a vacuum pump communicated with the adsorption tank, a gas distribution pipe is connected in the adsorption tank, a cylindrical molecular sieve wrapping the gas distribution pipe is connected in the adsorption tank, the bottom of the adsorption tank is connected with a gas inlet pipe communicated with the gas distribution pipe, and the bottom of the adsorption tank is connected with a gas outlet pipe communicated with the gas distribution pipe. The air blower is connected with an air guide pipe communicated with the air inlet pipe, the top of the adsorption tank is connected with an oxygen discharge pipe communicated with the outer side of the cylindrical molecular sieve, and one side of the air guide pipe is connected with a refrigeration drying box, a dust adsorption box and an air quality detection box from outside to inside. Compared with the prior art, the oxygen production device has the advantages that the gas distribution pipe and the cylindrical molecular sieve are arranged inside the oxygen production device, so that the adsorption surface can be greatly improved, the adsorption oxygen production efficiency is improved, and meanwhile, the refrigeration drying box and the dust adsorption box are arranged at the front end, so that the influence on the molecular sieve can be reduced; the oxygen production efficiency and the oxygen production quality are further improved.

Description

Technical Field

[0001] This utility model relates to the field of oxygen generation device technology, specifically to a VPSA oxygen generation device. Background Technology

[0002] A VPSA oxygen generator is a mechanical device mainly composed of a blower, vacuum pump, switching valve, adsorber, and oxygen balance tank. It is an industrial oxygen generator, also known as a PSA oxygen generator, or pressurized adsorption / vacuum desorption oxygen generator. This device utilizes a special VPSA molecular sieve to selectively adsorb impurities such as nitrogen, carbon dioxide, and water from the air under atmospheric pressure. Under vacuum conditions, the molecular sieve is desorbed, thus producing high-purity oxygen in a cyclical manner.

[0003] Existing VPSA oxygen generation devices mostly use plate molecular sieve adsorption. Due to the limited contact area, the adsorption efficiency in a single adsorption tank is relatively low. At the same time, the high relative humidity in some areas leads to an excess of water molecules, which significantly affects the adsorption of the molecular sieve. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a VPSA oxygen generator, addressing the shortcomings mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a VPSA oxygen generating device, including an adsorption tank, a blower and a vacuum pump connected to the adsorption tank, a gas distribution pipe connected inside the adsorption tank, a cylindrical molecular sieve wrapped around the gas distribution pipe connected inside the adsorption tank, an air inlet pipe connected to the gas distribution pipe connected to the bottom of the adsorption tank, a gas guide pipe connected to the air inlet pipe connected to the blower, and an oxygen exhaust pipe connected to the outside of the cylindrical molecular sieve connected to the top of the adsorption tank.

[0006] The air duct is connected to a refrigeration drying box, a dust adsorption box, and an air quality detection box from the outside to the inside.

[0007] Furthermore, the adsorption tank, air inlet pipe, and oxygen exhaust pipe are all provided in multiple ways. A first electrically controlled valve is connected to the air inlet pipe. A vacuum pipe connected to a vacuum pump is connected between the adsorption tank and the air inlet pipe. A second electrically controlled valve is connected to the vacuum pipe to facilitate the control of air intake and vacuum extraction operations.

[0008] Furthermore, the oxygen exhaust pipes are connected in sequence from bottom to top to an oxygen content sensor and a third electrically controlled valve, and the tops of multiple oxygen exhaust pipes are connected to an external discharge pipe for convenient control of the external discharge operation.

[0009] Furthermore, the refrigeration drying chamber is equipped with an S-shaped coil connected to the air guide pipe, and a refrigeration water guide pipe wrapped around the S-shaped coil is also connected inside the refrigeration drying chamber. The two ends of the refrigeration water guide pipe are respectively connected to a cold water inlet pipe and a cold water outlet pipe, which facilitates the cooling of water and the condensation and drying of water molecules in the air.

[0010] Furthermore, the bottom of the S-shaped coil is connected to multiple drain pipes extending to the outside of the refrigeration water pipe. A fourth electrically controlled valve is connected to each drain pipe. The multiple drain pipes are connected to a water collection pipe, which is connected to an external condensate drain pipe to facilitate condensate drainage.

[0011] Furthermore, a support mesh plate is connected inside the dust adsorption box, and a dust filter cloth layer is fixedly connected to the front of the support mesh plate to facilitate the filtering of dust particles in the air.

[0012] Furthermore, the air quality detection box includes a temperature sensing module, a dust level sensing module, and an air humidity sensing module, which facilitates air quality sensing operations.

[0013] Furthermore, the refrigeration drying box, dust adsorption box, and air quality detection box are all equipped with sealed maintenance and repair doors to facilitate maintenance and repair work.

[0014] Furthermore, the gas distribution pipe is equipped with multiple gas outlets to facilitate multi-directional gas output and further improve the adsorption oxygen generation operation.

[0015] The advantages of this VPSA oxygen generator compared to existing technologies are as follows: By internally setting up a gas distribution pipe and a cylindrical molecular sieve, this invention can greatly increase the adsorption surface, thereby improving the adsorption oxygen generation efficiency. At the same time, by setting up a refrigeration drying box and a dust adsorption box at the front end, the impact on the molecular sieve can be reduced, further improving the oxygen generation efficiency and quality. Attached Figure Description

[0016] Figure 1 This is a first structural schematic diagram of a VPSA oxygen generator according to the present invention.

[0017] Figure 2 This is a second structural schematic diagram of a VPSA oxygen generator according to this utility model.

[0018] Figure 3 This is a cross-sectional structural diagram of the adsorption tank of a VPSA oxygen generator according to this utility model.

[0019] Figure 4 This is a cross-sectional structural schematic diagram of a VPSA oxygen generating device according to this utility model.

[0020] As shown in the figure: 1. Adsorption tank; 2. Blower; 3. Inlet pipe; 4. Guide pipe; 5. Distributor pipe; 6. Cylindrical molecular sieve; 7. Oxygen exhaust pipe; 8. First electrically controlled valve; 9. Vacuum tube; 10. Second electrically controlled valve; 11. Vacuum pump; 12. Oxygen content sensor; 13. Third electrically controlled valve; 14. External exhaust pipe; 15. Refrigeration drying oven; 16. Dust adsorption box; 17. Air quality detection box; 18. S-shaped coil; 19. Refrigeration water pipe; 20. Cold water inlet pipe; 21. Cold water outlet pipe; 22. Drain pipe; 23. Water collection pipe; 24. Condensate discharge pipe; 25. Fourth electrically controlled valve; 26. Support mesh plate; 27. Dust filter cloth layer; 28. Sealed maintenance and repair door; 29. ​​Air outlet. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] Combined with appendix Figure 1-4 A VPSA oxygen generator includes an adsorption tank 1, a blower 2, and a vacuum pump 11 connected to the adsorption tank 1. The adsorption tank 1 is internally connected to a gas distribution pipe 5 and a cylindrical molecular sieve 6 encasing the gas distribution pipe 5. The bottom of the adsorption tank 1 is connected to an inlet pipe 3 connected to the gas distribution pipe 5, and the gas distribution pipe 5 has multiple outlet holes 29. The blower 2 is connected to a guide pipe 4 connected to the inlet pipe 3, and the top of the adsorption tank 1 is connected to an oxygen exhaust pipe 7 connected to the outside of the cylindrical molecular sieve 6. Gas is supplied to the inlet pipe 3 through the guide pipe 4, and gas is exhausted from all directions through the multiple outlet holes 29. The cylindrical molecular sieve 6 allows for maximum gas flow, significantly improving oxygen generation efficiency.

[0023] The air duct 4 is connected from the outside to the inside to a refrigeration drying chamber 15, a dust adsorption chamber 16, and an air quality detection chamber 17. An S-shaped coil 18, communicating with the air duct 4, is connected inside the refrigeration drying chamber 15. A refrigeration water pipe 19, which wraps around the S-shaped coil 18, is also connected inside the refrigeration drying chamber 15. A cold water inlet pipe 20 and a cold water outlet pipe 21 are connected to both ends of the refrigeration water pipe 19, respectively. The refrigeration water pipe 19 is refrigerated through the cold water inlet pipe 20 and the cold water outlet pipe 21. The system introduces chilled water for refrigeration, thereby comprehensively cooling the S-shaped coil 18. This condenses the internal air and reduces the impact of water molecules on the molecular sieve. Multiple drain pipes 22 extending to the outside of the refrigeration water pipe 19 are connected to the bottom of the S-shaped coil 18. A fourth electrically controlled valve 25 is connected to each drain pipe 22. All drain pipes 22 are connected to a water collection pipe 23, which is connected to an external condensate drain pipe 24. Figure 4As shown, the drain pipe 22 is located at the bottom of the S-shaped coil 18. The fourth electric control valve 25 can be opened periodically to discharge the condensate collected in the condensate, which is then discharged through the water collection pipe 23 and the condensate discharge pipe 24.

[0024] The dust adsorption box 16 is equipped with a support mesh plate 26, and a dust filter cloth layer 27 is fixedly connected to the front of the support mesh plate 26. The air quality detection box 17 includes a temperature sensing module, a dust intensity sensing module, and an air humidity sensing module. The refrigeration drying box 15, the dust adsorption box 16, and the air quality detection box 17 are all connected to a sealed maintenance door 28. At the same time, the support mesh plate 26 and the dust filter cloth layer 27 can filter dust in the gas, which can further reduce the impact of dust particles on the molecular sieve. At the same time, the temperature sensing module, the dust intensity sensing module, and the air humidity sensing module can sense the corresponding data of the air. The temperature sensing module, the dust intensity sensing module, and the air humidity sensing module are equipped with corresponding sensors. This is common existing technology, so it will not be described in detail. Based on the sensing data, it is determined whether the dust adsorption box 16 needs to be cleaned and the cold water input rate and temperature are adjusted. The corresponding cold water inlet pipe 20 and cold water outlet pipe 21 need to be connected to an external cold water circulation device.

[0025] Multiple adsorption tanks 1, inlet pipes 3, and exhaust pipes 7 are provided. A first electrically controlled valve 8 is connected to the inlet pipe 3. A vacuum pipe 9 connected to a vacuum pump 11 is connected between the adsorption tank 1 and the inlet pipe 3. A second electrically controlled valve 10 is connected to the vacuum pipe 9. An oxygen content sensor 12 and a third electrically controlled valve 13 are connected sequentially from bottom to top on the exhaust pipes 7. An external exhaust pipe 14 is connected to the top of the multiple exhaust pipes 7. With multiple adsorption tanks 1, inlet pipes 3, and exhaust pipes 7, the mass of the exhaust gas is sensed by the oxygen content sensor 12. If the oxygen content decreases, it indicates that the molecular sieve needs to be cleaned. Then, the first electrically controlled valve 8 and the third electrically controlled valve 13 of this adsorption tank 1 are closed, and the second electrically controlled valve 10 and the vacuum pump 11 are opened. Then, the second electrically controlled valve 10 of another adsorption tank 1 is closed, and the first electrically controlled valve 8 and the third electrically controlled valve 13 of this adsorption tank 1 are opened.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A VPSA oxygen generation plant comprising an adsorption vessel (1), a blower (2) and a vacuum pump (11) in communication with the adsorption vessel (1), characterized in that: The adsorption tank (1) is connected with a gas distribution pipe (5), the adsorption tank (1) is connected with a cylindrical molecular sieve (6) wrapping the gas distribution pipe (5), the bottom of the adsorption tank (1) is connected with a gas inlet pipe (3) communicating with the gas distribution pipe (5), the blower (2) is connected with a gas guide pipe (4) communicating with the gas inlet pipe (3), and the top of the adsorption tank (1) is connected with an oxygen exhaust pipe (7) communicating with the outside of the cylindrical molecular sieve (6). The gas guide pipe (4) is connected with a refrigeration drying box (15), a dust adsorption box (16) and an air quality detection box (17) from the outside to the inside.

2. A VPSA oxygen generation plant as claimed in claim 1, wherein: The adsorption tank (1), the gas inlet pipe (3) and the oxygen exhaust pipe (7) are all provided with a plurality of, the gas inlet pipe (3) is connected with a first electric control valve (8), the adsorption tank (1) and the gas inlet pipe (3) are connected with a vacuum pipe (9) connected with a vacuum pump (11), and the vacuum pipe (9) is connected with a second electric control valve (10).

3. A VPSA oxygen generation plant as claimed in claim 2, wherein: The oxygen exhaust pipe (7) is sequentially connected with an oxygen content sensor (12) and a third electric control valve (13) from bottom to top, and the tops of a plurality of oxygen exhaust pipes (7) are jointly connected with an external exhaust pipe (14).

4. A VPSA oxygen generation plant as claimed in claim 1, wherein: The refrigeration drying box (15) is connected with an S-shaped coil pipe (18) communicating with the gas guide pipe (4), the refrigeration drying box (15) is connected with a refrigeration water guide pipe (19) wrapping the S-shaped coil pipe (18), and the refrigeration water guide pipe (19) is connected with a cold water inlet pipe (20) and a cold water outlet pipe (21) at both ends respectively.

5. A VPSA oxygen generation plant as claimed in claim 4, wherein: The bottom of the S-shaped coil pipe (18) is connected with a plurality of drain pipes (22) extending to the outside of the refrigeration water guide pipe (19), the drain pipes (22) are connected with a fourth electric control valve (25), and a plurality of drain pipes (22) are jointly connected with a water collecting pipe (23), and the water collecting pipe (23) is connected with an external condensate water outlet pipe (24).

6. A VPSA oxygen generation plant as claimed in claim 1, wherein: The dust adsorption box (16) is connected with a support net plate (26), and the front of the support net plate (26) is fixedly connected with a dust filter cloth layer (27).

7. A VPSA oxygen generation plant as claimed in claim 1, wherein: The air quality detection box (17) comprises a temperature sensing module, a dust degree sensing module and an air humidity sensing module.

8. A VPSA oxygen generation plant as claimed in claim 1, wherein: The refrigeration drying box (15), the dust adsorption box (16) and the air quality detection box (17) are all connected with a sealed maintenance and repair door (28).

9. A VPSA oxygen generation plant as claimed in claim 1, wherein: The gas distribution pipe (5) is provided with a plurality of gas outlets (29).

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