High-purity oxygen production device

Abstract

The utility model discloses a high-purity oxygen production device which comprises an air compressor and a filter assembly, and the air compressor is communicated with the filter assembly. The nitrogen absorption and oxygen generation assembly comprises a nitrogen absorption and oxygen generation tower with a built-in nitrogen absorption and oxygen generation molecular sieve, the nitrogen absorption and oxygen generation tower is provided with a nitrogen discharge port and an oxygen extraction port, and the nitrogen discharge port is connected with a nitrogen discharge valve; the oxygen uptake and nitrogen discharge assembly comprises an oxygen uptake and nitrogen discharge tower which is communicated with the oxygen extraction opening and internally provided with an oxygen uptake and nitrogen discharge molecular sieve, the oxygen uptake and nitrogen discharge tower is provided with an oxygen extraction opening and a nitrogen discharge opening, and the oxygen extraction opening is connected with an oxygen extraction valve; the input end of the vacuum pump is connected with the oxygen pumping valve, and the output end of the vacuum pump is communicated with the oxygen storage tank. According to the high-purity oxygen production device, after most of nitrogen in air is filtered through the oxygen uptake and nitrogen discharge assembly, oxygen with a certain purity is generated, the generated oxygen is introduced into the oxygen uptake and nitrogen discharge assembly, the oxygen is adsorbed through the nitrogen uptake and oxygen production molecular sieve in the oxygen uptake and nitrogen discharge tower till saturation, the oxygen is pumped out through the vacuum pump, and the high-purity oxygen can be generated.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen production, in particular to a high-purity oxygen production device. Background Art

[0002] Pressure swing adsorption oxygen generator is a type of machine that produces oxygen based on air separation technology. It uses the adsorption performance of molecular sieves, through physical principles, and uses a large-displacement oil-free compressor as power to separate nitrogen and oxygen in the air, and finally obtains a certain concentration of oxygen. This type of oxygen generator produces oxygen quickly and has a relatively high oxygen concentration, so it has been widely used in metallurgy, chemical industry, petroleum, national defense and other fields.

[0003] However, the oxygen concentration produced by the pressure swing adsorption oxygen generators on the market is generally around 93%. Although the molecular sieve can adsorb most of the nitrogen, there is still a small amount of oxygen mixed in the oxygen. In addition, the air itself contains 1% of other gases, resulting in the inability to further improve the purity of the produced oxygen, and thus it cannot be used in some scenarios that require a relatively higher oxygen concentration.

[0004] Therefore, it is necessary to improve the oxygen production device in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects in the prior art and provide a high-purity oxygen production device which can further improve the purity of oxygen.

[0006] In order to achieve the above technical effects, the technical solution of the utility model is: a high-purity oxygen production device, comprising:

[0007] An air compressor and a filter assembly, wherein the input end of the air compressor is connected to the outside, and the output end is connected to the filter assembly to output clean compressed air;

[0008] A nitrogen absorption and oxygen production component, wherein the nitrogen absorption and oxygen production component comprises a nitrogen absorption and oxygen production tower connected to the output end of the filter component and having a built-in nitrogen absorption and oxygen production molecular sieve, wherein the nitrogen absorption and oxygen production tower is provided with a nitrogen discharge port and an oxygen supply port, and the nitrogen discharge port is connected to a nitrogen discharge valve;

[0009] An oxygen absorption and nitrogen discharge component, wherein the oxygen absorption and nitrogen discharge component comprises an oxygen absorption and nitrogen discharge tower connected to the oxygen supply port and having a built-in oxygen absorption and nitrogen discharge molecular sieve, wherein the oxygen absorption and nitrogen discharge tower is provided with an oxygen extraction port and a nitrogen discharge port, and the oxygen extraction port is connected to an oxygen extraction valve;

[0010] A vacuum pump and an oxygen storage tank, wherein the input end of the vacuum pump is connected to an end of the oxygen extraction valve away from the oxygen absorption and nitrogen discharge tower, and the output end is connected to the oxygen storage tank, and the oxygen storage tank is provided with an oxygen supply port.

[0011] A further improvement is that, in order to facilitate the detection of the internal pressure of the nitrogen absorption and oxygen production tower and / or the oxygen absorption and nitrogen exhaust tower, the nitrogen absorption and oxygen production tower and / or the oxygen absorption and nitrogen exhaust tower are connected to a pressure gauge for detecting the internal air pressure.

[0012] A further improvement is that, in order to achieve continuous nitrogen absorption and oxygen production, the nitrogen absorption and oxygen production component includes at least two nitrogen absorption and oxygen production towers, and an oxygen supply valve is provided between the oxygen supply port and the oxygen absorption and nitrogen discharge tower.

[0013] A further improvement is that, in order to realize continuous oxygen absorption and nitrogen production, the oxygen absorption and nitrogen discharge component includes at least two oxygen absorption and nitrogen discharge towers, and the nitrogen discharge port is connected to a nitrogen discharge valve.

[0014] A further improvement is that, in order to ensure gas pressure balance, the nitrogen absorption and oxygen production assembly further includes an oxygen buffer tank, and the oxygen buffer tank is connected between the nitrogen absorption and oxygen production tower and the oxygen absorption and nitrogen discharge tower.

[0015] A further improvement is that, in order to introduce clean high-purity oxygen into the nitrogen absorption and oxygen production component, the nitrogen absorption and oxygen production component also includes a dust filter, and the dust filter is connected between the oxygen buffer tank and the oxygen absorption and nitrogen discharge tower.

[0016] A further improvement is that, in order to ensure the purity of oxygen introduced into the nitrogen absorption and oxygen production component, an oxygen purity analyzer, a flow meter and a valve switching component are sequentially arranged between the dust filter and the oxygen absorption and nitrogen exhaust component, and the valve switching component includes a first valve and a second valve. The flow meter is connected to the oxygen absorption and nitrogen exhaust component through the first valve, and is connected to the outside world or the input end of the air compressor through the second valve.

[0017] A further improvement is that, in order to reduce gas consumption, the flow meter is connected to the input end of the air compressor through the second valve.

[0018] Preferably, in order to ensure stable air pressure between the air compressor and the filter assembly, the air compressor is connected to the filter assembly via an air buffer tank.

[0019] Preferably, in order to ensure the filtering accuracy, the filter assembly includes a primary filter, a secondary filter, a tertiary filter and a quaternary filter which are arranged in sequence along the flow direction of the compressed air and whose filtering accuracy decreases successively, and the primary filter and the secondary filter are connected through a cold dryer.

[0020] In summary, compared with the prior art, the high-purity oxygen production device of the utility model generates oxygen with a certain purity after filtering most of the nitrogen in the air through the oxygen absorption and nitrogen discharge component, and the generated oxygen is passed into the oxygen absorption and nitrogen discharge component. The nitrogen absorption and oxygen production molecular sieve in the oxygen absorption and nitrogen discharge tower adsorbs the oxygen until saturation, and then the oxygen is extracted by a vacuum pump to produce high-purity oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the first embodiment;

[0022] Figure 2 is a schematic structural diagram of the filter assembly of the first embodiment;

[0023] Figure 3 is a schematic structural diagram of a nitrogen absorption and oxygen production assembly according to a first embodiment;

[0024] Figure 4 is a schematic structural diagram of the oxygen absorption and nitrogen discharge assembly of the first embodiment;

[0025] Figure 5 is a schematic structural diagram of a second embodiment;

[0026] In the figure: 1. air compressor; 2. filter assembly; 21. primary filter; 22. secondary filter; 23. tertiary filter; 24. quaternary filter; 25. cold dryer; 3. nitrogen absorption and oxygen production assembly; 31. nitrogen absorption and oxygen production tower; 32. nitrogen discharge valve; 33. oxygen supply valve; 34. oxygen buffer tank; 35. dust filter; 4. oxygen absorption and nitrogen exhaust assembly; 41. oxygen absorption and nitrogen exhaust tower; 42. oxygen extraction valve; 43. nitrogen exhaust valve; 5. vacuum pump; 6. oxygen storage tank; 7. pressure gauge; 8. oxygen purity analyzer; 9. flow meter; 10. first valve; 11. second valve; 12. air buffer tank; 13. drain valve; 14. muffler. DETAILED DESCRIPTION

[0027] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] First embodiment

[0029] like Figure 1-Figure 4 As shown, the high-purity oxygen production device of the first embodiment of the utility model comprises:

[0030] An air compressor 1 and a filter assembly 2, wherein the input end of the air compressor 1 is connected to the outside, and the output end is connected to the filter assembly 2 to output clean compressed air;

[0031] The nitrogen absorption oxygen production component 3 includes a nitrogen absorption oxygen production tower 31 which is connected to the output end of the filter component 2 and has a built-in nitrogen absorption oxygen production molecular sieve. The nitrogen absorption oxygen production tower 31 is provided with a nitrogen discharge port and an oxygen supply port, and the nitrogen discharge port is connected to a nitrogen discharge valve 32;

[0032] The oxygen absorption and nitrogen discharge component 4 includes an oxygen absorption and nitrogen discharge tower 41 which is connected to the oxygen supply port and has a built-in oxygen absorption and nitrogen discharge molecular sieve. The oxygen absorption and nitrogen discharge tower 41 is provided with an oxygen extraction port and a nitrogen discharge port. The oxygen extraction port is connected to an oxygen extraction valve 42.

[0033] The vacuum pump 5 and the oxygen storage tank 6, the input end of the vacuum pump 5 is connected to the end of the oxygen extraction valve 42 away from the oxygen absorption and nitrogen discharge tower 41, and the output end is connected to the oxygen storage tank 6, and the oxygen storage tank 6 is provided with an oxygen supply port.

[0034] When the high-purity oxygen production device of this embodiment is in operation, the air compressor 1 collects external air for compression processing, and then passes it into the filter component 2, and the filter component 2 is used to filter out impurities such as oil mist, particles, and moisture in the compressed air to form clean compressed air; the clean compressed air is passed into the nitrogen absorption oxygen production tower 31 in the nitrogen absorption oxygen production component 3, and the nitrogen absorption oxygen production molecular sieve is used to absorb most of the nitrogen in the compressed air, while most of the oxygen passes through the nitrogen absorption oxygen production molecular sieve, so that most of the oxygen and a small amount of nitrogen form an oxygen mixture with a certain purity. The oxygen in the oxygen-exhaust gas is discharged through the oxygen-exhaust port and enters the oxygen-exhaust tower 41 in the oxygen-exhaust nitrogen-exhaust component 4. The oxygen in the oxygen-exhaust nitrogen-exhaust gas mixture with a certain purity is adsorbed by the oxygen-exhaust nitrogen-exhaust molecular sieve. The nitrogen passes through the oxygen-exhaust nitrogen-exhaust molecular sieve and is discharged from the nitrogen-exhaust port. The oxygen is adsorbed by the oxygen-exhaust nitrogen-exhaust molecular sieve. After the oxygen-exhaust nitrogen-exhaust molecular sieve is saturated with adsorption, the oxygen extraction valve 42 is opened, the vacuum pump 5 is started, and the gas in the oxygen-exhaust nitrogen-exhaust tower 41 is extracted, so that the oxygen adsorbed by the oxygen-exhaust nitrogen-exhaust molecular sieve is extracted by the vacuum pump 5 and transported to the oxygen storage tank 6 to form high-purity oxygen. In this embodiment, the oxygen supply port is connected to an oxygen supply valve. When high-purity oxygen is needed, the oxygen supply valve is opened, and high-purity oxygen can be output through the oxygen supply port.

[0035] Specifically, in this embodiment, the external air first passes through the air compressor 1. The air compressor 1 can provide stable and continuous compressed air, which is the cornerstone for ensuring the efficient and stable operation of the oxygen production process. The role of the air compressor 1 is manifested in: first, the air compressor 1 ensures the efficiency and continuity of the oxygen production process. The compressed air it provides is an indispensable step in oxygen production and is directly related to the optimization of oxygen production and purity; secondly, the performance of the air compressor 1 has a direct impact on the overall efficiency, stability and oxygen purity of the oxygen production system.

[0036] In order to ensure the continuous output of stable compressed air to the nitrogen absorption and oxygen production component 3, an air buffer tank 12 is also provided between the output end of the air compressor 1 and the filter component 2, and the output end of the air compressor 1 is connected to the air buffer tank 12 through a valve. The compressed air output by the air compressor 1 often has pulsation of air flow pressure, and the air buffer tank 12 can eliminate or reduce such pulsation, making the air flow more stable, extending the cycle of "start-stop" or "load-unload" of the air compressor 1, reducing the switching speed of the electrical valve, and preventing the compressed air pipeline from returning gas due to some reasons during the shutdown of the air compressor 1, and backflowing into the air compressor 1 to cause malfunction and damage; in addition, the air buffer tank 12 adopts a structure with a large-area cylindrical heat sink, so that the compressed gas entering the tank swirls and attaches to the wall, which can not only cool the compressed air, but also facilitate the precipitation of moisture and dust impurities therein, which will fall to the bottom of the air buffer tank 12 and precipitate, thereby further realizing preliminary drainage and decontamination, so as to reduce the complexity of subsequent filtration of the filter component 2. Therefore, the air buffer tank 12 is arranged at the output end of the air compressor 1, which can play multiple functions such as buffering, cooling, dehumidification, and impurity removal, ensuring the efficient and stable operation of the oxygen production system.

[0037] After passing through the air buffer tank 12, the compressed air is transported to the filter assembly 2, and impurities such as moisture, oil droplets, and particles in the compressed air are filtered out by the filter assembly 2. The filter assembly 2 includes a primary filter 21, a secondary filter 22, a tertiary filter 23, and a quaternary filter 24, which are arranged in sequence along the flow direction of the compressed air and have decreasing filtering accuracy. The primary filter 21 and the secondary filter 22 are connected through a cold dryer 25.

[0038] Among them, the function of the cold dryer 25 is mainly to remove moisture from the compressed air and ensure that the compressed air entering the nitrogen absorption and oxygen production component 3 and the oxygen absorption and nitrogen exhaust component 4 is dry, which helps the nitrogen absorption and oxygen production tower 31 and the oxygen absorption and nitrogen exhaust tower 41 to work better and extend the service life of the internal molecular sieve; specifically, the cold dryer 25 is a device for processing moisture in the air. By removing moisture from the air, it can prevent moisture from damaging machinery, electronic equipment and other equipment. Since in the oxygen production system, keeping the air dry is crucial to the efficiency of the oxygen production process and the purity of oxygen, the cold dryer 25 plays a key role in the device of this embodiment.

[0039] The filter assembly 2 is provided with four filters, which are the primary filter 21, the secondary filter 22, the tertiary filter 23 and the quaternary filter 24 along the compressed air flow direction. The filtering precision is reduced successively, so that the filtering quality is improved successively, so as to ensure the filtering and purification effect of moisture, oil droplets and particles in the compressed air, which is helpful for the subsequent oxygen production operation. Specifically, the primary filter 21 is a pre-filter, which is mainly used to remove large particle impurities with larger particle sizes in the compressed air, such as dust, sand particles, etc., which is helpful for the normal operation of the subsequent filter, prolongs the service life, and reduces the potential damage of impurities to the subsequent filter; the filtering precision of the secondary filter 22 is reduced, which further refines the filtering process, can remove smaller particles and certain specific pollutants, and through the secondary filtration, the impurity content in the air can be further reduced, providing purer compressed air for the subsequent oxygen production process; the tertiary filter 23 is usually used to remove oil mist and other organic pollutants to ensure that the air entering the nitrogen absorption oxygen production assembly 3 is clean; the quaternary filter 24 is used as the final filter to remove any residual impurities and tiny particles to ensure that the compressed air entering the nitrogen absorption oxygen production tower 31 is of high purity and high quality. In this way, the compressed air after four-stage filtration can meet the high quality requirements of the nitrogen absorption and oxygen production tower 31 and the oxygen absorption and nitrogen discharge tower 41 for the raw gas, thereby improving the oxygen production efficiency and facilitating the improvement of the purity of the output oxygen.

[0040] In summary, through the arrangement of the cold dryer 25 and the four filters, an efficient filtering system is formed, which can ensure the quality and purity of the compressed air entering the nitrogen absorption and oxygen production component 3, and provide reliable protection for the oxygen production process.

[0041] A further improvement is that the nitrogen absorption and oxygen production component 3 further includes an oxygen buffer tank 34 , and the oxygen buffer tank 34 is connected between the nitrogen absorption and oxygen production tower 31 and the oxygen absorption and nitrogen discharge tower 41 .

[0042] After the clean compressed air enters the nitrogen absorption and oxygen production tower 31, most of the nitrogen in the air is adsorbed by the nitrogen absorption and oxygen production molecular sieve, so that after the compressed air passes through the nitrogen absorption and oxygen production molecular sieve, a mixed gas consisting of mostly oxygen and a small amount of nitrogen with a greatly increased oxygen concentration is formed. The mixed gas is output from the oxygen supply port and enters the oxygen buffer tank 34. The oxygen buffer tank 34 can cache the above-mentioned oxygen mixed gas with a certain purity, thereby stabilizing the airflow, reducing system pressure fluctuations, and ensuring smooth transportation of the gas into the oxygen absorption and nitrogen discharge tower 41.

[0043] A further improvement is that the nitrogen absorption oxygen production component 3 further includes a dust filter 35, and the dust filter 35 is connected between the oxygen buffer tank 34 and the oxygen absorption and nitrogen discharge tower 41. After the dust filter 35 is set, the oxygen mixed gas with a certain purity passing through the oxygen buffer tank 34 can be filtered to remove dust and impurities therein, so as to ensure that the clean oxygen mixed gas enters the oxygen absorption and nitrogen discharge tower 41, avoid dust and impurities from polluting and damaging the oxygen absorption and nitrogen discharge molecular sieve, and ensure that oxygen is smoothly adsorbed by the oxygen absorption and nitrogen discharge molecular sieve.

[0044] A further improvement is that an oxygen purity analyzer 8, a flow meter 9 and a valve switching assembly are sequentially arranged between the dust filter 35 and the oxygen and nitrogen exhaust assembly 4. The valve switching assembly includes a first valve 10 and a second valve 11. The flow meter 9 is connected to the oxygen and nitrogen exhaust assembly 4 through the first valve 10, and is connected to the outside through the second valve 11.

[0045] After adopting the above structure, the purity of oxygen in the oxygen mixed gas can be detected by the oxygen purity analyzer 8, and the flow rate of the mixed gas passing through can be detected by the flow meter 9. If the oxygen purity meets the standard, the first valve 10 is opened and the second valve 11 is closed, so that the high-purity oxygen mixed gas enters the oxygen absorption and nitrogen discharge tower 41 of the oxygen absorption and nitrogen discharge component 4. If the oxygen purity does not meet the standard, the first valve 10 is closed and the second valve 11 is opened to discharge the mixed gas that does not meet the standard to the outside. It should be noted that the purity standard of oxygen in the oxygen mixed gas can be adjusted and controlled according to the actual needs of the user.

[0046] A further improvement is that the nitrogen absorption and oxygen production tower 31 and / or the oxygen absorption and nitrogen discharge tower 41 are connected to a pressure gauge 7 for detecting the internal air pressure.

[0047] Specifically, the nitrogen absorption and oxygen production tower 31, the oxygen absorption and nitrogen discharge tower 41, the oxygen buffer tank 34, the oxygen storage tank 6 and the air buffer tank 12 are all connected with a pressure gauge 7. By providing the pressure gauge 7, it is convenient to detect the internal pressure of the nitrogen absorption and oxygen production tower 31, the oxygen absorption and nitrogen discharge tower 41, the oxygen buffer tank 34, the oxygen storage tank 6 and the air buffer tank 12, and then it is convenient to judge the operating status of the oxygen production system.

[0048] A further improvement is that the nitrogen absorption and oxygen production component 3 includes at least two nitrogen absorption and oxygen production towers 31, and an oxygen supply valve 33 is provided between the oxygen supply port and the oxygen absorption and nitrogen discharge tower 41; the oxygen absorption and nitrogen discharge component 4 includes at least two oxygen absorption and nitrogen discharge towers 41, and a nitrogen discharge valve 43 is connected to the nitrogen discharge port.

[0049] In this embodiment, in order to save costs while ensuring the continuous operation of the oxygen production system, the nitrogen absorption and oxygen production component 3 includes two nitrogen absorption and oxygen production towers 31 , and the oxygen absorption and nitrogen exhaust component 4 includes two oxygen absorption and nitrogen exhaust towers 41 .

[0050] When the nitrogen absorption and oxygen production component 3 is working, the nitrogen absorption and oxygen production molecular sieve in one of the nitrogen absorption and oxygen production towers 31 is used to absorb nitrogen in the compressed air, extract oxygen, and increase the concentration of the oxygen mixed gas. The oxygen supply valve 33 corresponding to the nitrogen absorption and oxygen production tower 31 is opened, and the nitrogen discharge valve 32 is closed, so that after the compressed air passes through the nitrogen absorption and oxygen production tower 31, an oxygen mixed gas with a certain purity is output from the oxygen supply port; and the nitrogen absorption and oxygen production molecular sieve in the other nitrogen absorption and oxygen production tower 31 is saturated with absorption, so the oxygen supply valve 33 corresponding to the nitrogen absorption and oxygen production tower 31 is closed, and the nitrogen discharge valve 32 is opened, so that the nitrogen absorption and oxygen production molecular sieve outputs the nitrogen adsorbed by itself through the nitrogen discharge valve 32 during the regeneration process. In order to reduce the noise generated during the discharge of nitrogen, a muffler 14 is connected to the end of the nitrogen discharge valve 32 away from the nitrogen discharge port. Specifically, the muffler 14 is arranged at the bottom of the nitrogen absorption oxygen production tower 31, and is mainly used to reduce the noise level. During the oxygen extraction process, especially when the nitrogen absorption oxygen production molecular sieve is regenerated, due to factors such as gas flow and pressure change, large noise may be generated. By arranging the muffler 14 at the bottom of the nitrogen absorption oxygen production tower 31, the propagation of these noises can be effectively weakened, thereby protecting the hearing of the operator and reducing the noise pollution to the surrounding environment; in addition, reducing noise can also help improve the operational safety and stability of the oxygen production system. Excessive noise may interfere with the operator's judgment and operation and increase the risk of misoperation. The use of the muffler 14 can reduce such interference and improve the operator's work efficiency and safety.

[0051] A further improvement is that the bottom of the air buffer tank 12, the primary filter 21, the secondary filter 22, the tertiary filter 23, the quaternary filter 24, the cold dryer 25, the oxygen buffer tank 34, the dust filter 35 and the oxygen storage tank 6 are all connected with a drain valve 13. By setting the drain valve 13, it is convenient to open the drain valve 13 after the device has been running for a period of time to discharge impurities and dirt generated by the operation of the oxygen production system in time, so as to ensure the long-term continuous operation of the high-purity oxygen production device.

[0052] After adopting the above structure, the purity of oxygen produced by this embodiment can be as high as 99.5%, which is significantly higher than the 93% purity of oxygen produced by oxygen generators on the market, thereby meeting the demand for higher concentration oxygen in some places.

[0053] Second embodiment

[0054] like Figure 5 As shown, the high-purity oxygen production device of the second embodiment of the utility model is based on the first embodiment, and the difference is that the flow meter 9 is connected to the input end of the air compressor 1 through the second valve 11.

[0055] After adopting the above-mentioned improvement, when the nitrogen absorption oxygen production component 3 outputs oxygen with purity that does not meet the standard, the first valve 10 is closed and the second valve 11 is opened, so that the oxygen mixed gas with purity that does not meet the standard can be returned to the input end of the air compressor 1, and is compressed again by the air compressor 1, and then transported to the filter component 2 and enters the nitrogen absorption oxygen production component 3 to further improve the purity of oxygen to the standard set by the user. Compared with the first embodiment, it can significantly reduce the air consumption and save energy consumption, and avoid the oxygen mixed gas with purity lower than the set requirement being directly discharged to the outside to cause energy waste. At the same time, since the oxygen concentration in the mixed gas transported by the air compressor 1 is higher than the oxygen concentration in the outside air, it also helps to ensure the oxygen production efficiency.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-purity oxygen production device, characterized in that: include: An air compressor (1) and a filter assembly (2), wherein the input end of the air compressor (1) is connected to the outside, and the output end is connected to the filter assembly (2) to output clean compressed air; A nitrogen absorption and oxygen production component (3), the nitrogen absorption and oxygen production component (3) comprising a nitrogen absorption and oxygen production tower (31) which is connected to the output end of the filter component (2) and has a built-in nitrogen absorption and oxygen production molecular sieve, the nitrogen absorption and oxygen production tower (31) is provided with a nitrogen discharge port and an oxygen supply port, and the nitrogen discharge port is connected to a nitrogen discharge valve (32); An oxygen absorption and nitrogen discharge component (4), the oxygen absorption and nitrogen discharge component (4) comprising an oxygen absorption and nitrogen discharge tower (41) connected to the oxygen supply port and having a built-in oxygen absorption and nitrogen discharge molecular sieve, the oxygen absorption and nitrogen discharge tower (41) being provided with an oxygen extraction port and a nitrogen discharge port, the oxygen extraction port being connected to an oxygen extraction valve (42); A vacuum pump (5) and an oxygen storage tank (6), wherein the input end of the vacuum pump (5) is connected to an end of the oxygen extraction valve (42) away from the oxygen absorption and nitrogen discharge tower (41), and the output end is connected to the oxygen storage tank (6), and the oxygen storage tank (6) is provided with an oxygen supply port.

2. The high-purity oxygen production device according to claim 1, characterized in that: The nitrogen absorption and oxygen production tower (31) and / or the oxygen absorption and nitrogen discharge tower are connected to a pressure gauge (7) for detecting the internal air pressure.

3. The high-purity oxygen production device according to claim 1, characterized in that: The nitrogen absorption and oxygen production component (3) comprises at least two nitrogen absorption and oxygen production towers (31), and an oxygen supply valve (33) is provided between the oxygen supply port and the oxygen absorption and nitrogen discharge towers.

4. The high-purity oxygen production device according to claim 3, characterized in that: The oxygen absorption and nitrogen discharge component comprises at least two oxygen absorption and nitrogen discharge towers (41), and the nitrogen discharge port is connected to a nitrogen discharge valve (43).

5. The high-purity oxygen production device according to claim 3, characterized in that: The nitrogen absorption and oxygen production component (3) further comprises an oxygen buffer tank (34), wherein the oxygen buffer tank (34) is connected between the nitrogen absorption and oxygen production tower (31) and the oxygen absorption and nitrogen discharge tower (41).

6. The high-purity oxygen production device according to claim 5, characterized in that: The nitrogen absorption and oxygen production component (3) further comprises a dust filter (35), wherein the dust filter (35) is connected between the oxygen buffer tank (34) and the oxygen absorption and nitrogen discharge tower (41).

7. The high-purity oxygen production device according to claim 6, characterized in that: An oxygen purity analyzer (8), a flow meter (9) and a valve switching assembly are sequentially arranged between the dust filter (35) and the oxygen absorption and nitrogen discharge assembly (4); the valve switching assembly comprises a first valve (10) and a second valve (11); the flow meter (9) is connected to the oxygen absorption and nitrogen discharge assembly (4) via the first valve (10), and is connected to the outside world or to the input end of the air compressor (1) via the second valve (11).

8. The high-purity oxygen production device according to claim 7, characterized in that: The flow meter (9) is connected to the input end of the air compressor (1) via the second valve (11).

9. The high-purity oxygen production device according to any one of claims 1 to 8, characterized in that: The air compressor (1) is connected to the filter assembly (2) via an air buffer tank (12).

10. The high-purity oxygen production device according to any one of claims 1 to 8, characterized in that: The filter assembly (2) comprises a primary filter (21), a secondary filter (22), a tertiary filter (23) and a quaternary filter (24) which are arranged in sequence along the flow direction of the compressed air and whose filtering precisions decrease in sequence, and the primary filter (21) and the secondary filter (22) are connected to each other via a cold dryer (25).

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