Membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air

Abstract

The invention provides a membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air, the device comprises a common oxygen production main machine, a membrane separation purification system and a pure oxygen production main machine, when the common oxygen production main machine needs to be purged, oxygen-enriched nitrogen, high-concentration oxygen-enriched air and waste gas can be utilized to purge an adsorption tower. The system has the advantages that the oxygen concentration can be automatically switched according to the requirements of a hospital, and medical oxygen and oxygen-enriched air are provided for the hospital at the same time or are independently provided for any one of the medical oxygen and the oxygen-enriched air; the membrane separation oxygen production technology is adopted, high-concentration waste gas generated during membrane separation medical oxygen production is used in the production process of oxygen-enriched air, the air-oxygen ratio is optimized, and the gas consumption is lower compared with a medical oxygen production system on the market; the waste gas exhausted from the direct current side in the medical oxygen generation process is rich in oxygen which is still contained in gas mainly containing argon and nitrogen and still contains high-concentration oxygen, the oxygen is used for producing oxygen-enriched air, the production efficiency is improved, the air amount needed by a product is reduced, and the effect of reducing energy consumption is achieved.

Description

Technical Field

[0001] The present application belongs to the field of oxygen generators, and specifically relates to a membrane separation oxygen generator capable of simultaneously producing medical oxygen and oxygen-enriched air. Background Art

[0002] Oxygen-enriched air (general oxygen) can only supply oxygen to ordinary wards and hyperbaric oxygen chambers, while the oxygen concentration in special wards such as ICUs must meet medical oxygen standards (pure oxygen). Currently, most medical central oxygen production systems can only produce oxygen-enriched air (93% oxygen), but cannot meet the oxygen needs of all wards. A small number of oxygen production systems can only produce medical oxygen (99.5% oxygen), but the oxygen energy consumption is relatively high. If you want to use the medical central oxygen production system to meet both oxygen needs of the hospital at the same time, you need to arrange two oxygen production systems in the station, which will increase the floor space.

[0003] The Chinese invention patent with publication number CN106744698A and invention name "Method for preparing medical oxygen from mixed gas containing oxygen-containing air components by multi-cycle membrane separation" discloses a technical solution that uses at least one membrane separator for separation, mainly for removing nitrogen; uses at least one multi-cycle membrane separator for separation, mainly for removing argon and nitrogen; wherein: (a) at least a part of the oxygen generated from the permeate side is output as product gas; (b) the oxygen generated from the permeate side is circulated back to the second group of membrane separators as raw gas. According to the method of the invention, medical oxygen with an oxygen purity of ≥99.5% that meets the requirements of the standard "GB8982-2009 Medical and Aviation Breathing Oxygen" can be obtained. In the invention, the membrane separator involved in the membrane separation process is a separation element filled with membrane separation material, which has a certain selectivity for the oxygen, nitrogen and argon components to be separated. The invention uses at least one membrane separator for separation, mainly for removing nitrogen. It receives raw air and process gas returned from the subsequent stage, and after mixing, reaches an oxygen partial pressure of ≥100 (KPa), which is used as the raw gas for the first stage membrane separator, and discharges nitrogen-rich gas from the retentate side outlet of the membrane separator, and generates oxygen-rich gas from the permeate side outlet of the membrane separator and uses it as the raw gas for the subsequent stage membrane separator; it uses at least one stage of multi-cycle membrane separator for separation, mainly used to remove argon and nitrogen. The membrane separator of this cycle is composed of at least two groups of membrane separators, boosting equipment and necessary valves, receives oxygen-rich gas generated in the previous stage as raw material, and mixes it with the process gas returned from the cycle as the raw gas for the membrane separator of this stage, discharges argon and nitrogen-rich gas as the main gas from the retentate side of the first group of membrane separators, and discharges oxygen with a purity of ≥99.5% from the permeate side of the second group of membrane separators through the boosting equipment.

[0004] The technical solution of this invention has the following defects:

[0005] 1. Only medical oxygen can be produced through the membrane separation oxygen production system, and oxygen-enriched air cannot be produced at the same time;

[0006] 2. During the production of medical oxygen, the exhaust gas discharged from the DC side is rich in argon and nitrogen, and the main gas still contains a high concentration of oxygen that is discharged, resulting in a waste of oxygen;

[0007] 3. Due to the cost and durability of membrane materials, three sets of membrane separators are required, which is costly. In addition, the membrane material is used to directly purify air into oxygen, which results in a high material utilization rate and an increased failure rate.

[0008] The Chinese invention patent with publication number CN106744699A and invention name "An integrated system and method for pressure swing adsorption oxygen production and oxygen purification" discloses a method for producing and purifying oxygen by an integrated system, including: step 1, high-purity oxygen in the oxygen storage tank enters the buffer tank through the back-pressurization pipeline, and the pressure swing adsorption oxygen generator starts to run; the general oxygen produced by the pressure swing adsorption oxygen generator enters the buffer tank; step 2, the general oxygen in the buffer tank enters the oxygen purification host, and the oxygen purification host starts to run; the high-purity oxygen produced by the oxygen purification host enters the oxygen storage tank; step 3, the oxygen with unqualified purity in the oxygen storage tank enters the reflux tank through the recovery pipeline, which is used for purging and regenerating the molecular sieve in the pressure swing adsorption oxygen generator; step 4, the oxygen with qualified purity in the oxygen storage tank is output through the gas production valve.

[0009] The general oxygen production process of the pressure swing adsorption oxygen generator is as follows:

[0010] (1) The dried and purified compressed air enters the first adsorption tower, and the general oxygen produced by the first adsorption tower enters the buffer tank through the oxygen pipeline;

[0011] (2) The oxygen in the reflux tank enters the second adsorption tower for purging and regeneration. At the same time, part of the oxygen produced by the first adsorption tower enters the second adsorption tower through the regeneration pipeline, and the regeneration waste gas in the second adsorption tower enters the exhaust pipeline for exhaust;

[0012] (3) The oxygen in the first adsorption tower enters the second adsorption tower through the pressure equalization pipeline, thereby realizing the pressure equalization process of the first adsorption tower on the second adsorption tower;

[0013] (4) The residual gas in the first adsorption tower enters the exhaust pipeline;

[0014] (5) Switching the second adsorption tower, the compressed air enters the second adsorption tower, and the general oxygen produced by the second adsorption tower enters the buffer tank through the oxygen pipeline;

[0015] (6) The oxygen in the reflux tank enters the first adsorption tower for purging and regeneration. At the same time, part of the oxygen produced by the second adsorption tower enters the first adsorption tower through the regeneration pipeline, and the regeneration waste gas in the first adsorption tower enters the exhaust pipeline for exhaust;

[0016] (7) The oxygen in the second adsorption tower enters the first adsorption tower through the pressure equalization pipeline, thereby realizing the pressure equalization process of the second adsorption tower on the first adsorption tower;

[0017] (8) The residual gas in the second adsorption tower enters the exhaust pipeline;

[0018] (9) Repeat steps (1) to (8).

[0019] The process of high-purity oxygen produced by the oxygen purification host is as follows:

[0020] (1) The general oxygen in the buffer tank enters the first purification tower, and the gas flowing out of the first purification tower is first discharged through the exhaust gas exhaust pipeline; the first purification tower enters the working state;

[0021] (2) The oxygen flowing through the first purification tower flows into the reflux tank through the high-purity oxygen exhaust pipeline and is used to purge the molecular sieve in the pressure swing adsorption oxygen generator;

[0022] (3) The high-purity oxygen in the oxygen storage tank enters the first purification tower through the second high-purity oxygen purge pipeline to purge the first purification tower, and the purge gas enters the reflux tank through the first high-purity oxygen purge pipeline;

[0023] (4) a portion of the gas in the first purification tower enters the second purification tower through the fifth pressure equalizing pipeline, completing the pressure equalization process of the first purification tower on the second purification tower;

[0024] (5) The high-purity oxygen remaining in the first purification tower enters the high-purity oxygen outlet pipeline, is filtered and dusted by a filter, and then output to the oxygen storage tank through an oxygen vacuum-boosting dual-purpose compressor;

[0025] (6) The general oxygen in the buffer tank enters the second purification tower, and the gas flowing out of the second purification tower is first discharged through the exhaust gas exhaust pipeline; the second purification tower enters the working state;

[0026] (7) The oxygen flowing through the second purification tower flows into the reflux tank through the high-purity oxygen exhaust pipeline and is used for purging and regenerating the molecular sieve in the pressure swing adsorption oxygen generator;

[0027] (8) The high-purity oxygen in the oxygen storage tank enters the second purification tower through the second high-purity oxygen purge pipeline to purge the second purification tower, and the purge gas enters the reflux tank through the first high-purity oxygen purge pipeline;

[0028] (9) Part of the gas in the second purification tower enters the first purification tower through the fourth pressure equalizing pipeline, completing the pressure equalization process of the second purification tower on the first purification tower;

[0029] (10) The high-purity oxygen remaining in the second purification tower enters the high-purity oxygen outlet pipeline, is filtered and dusted by a filter, and then output to the oxygen storage tank through a vacuum-boosting dual-purpose compressor;

[0030] (11) Repeat steps (1) to (10).

[0031] The technical solution of the invention can only produce medical oxygen through the oxygen production system, but cannot produce oxygen-enriched air at the same time. And due to the characteristics of molecular sieves, the concentration of produced oxygen can only reach about 99.6%, and the stability is poor. Summary of the invention

[0032] The purpose of the present application is to overcome the defects of wasteful gas in the purge of the adsorption tower and large space occupied by the equipment when providing high-concentration oxygen-enriched air and medical oxygen at the same time.

[0033] In order to achieve the above-mentioned purpose, the present application proposes a membrane separation oxygen production device that can simultaneously produce medical oxygen and oxygen-enriched air, characterized in that the device comprises:

[0034] The oxygen generator 1 inputs compressed air and generates oxygen-enriched air which is then output to the membrane separation and purification system 2;

[0035] The membrane separation and purification system 2 inputs the oxygen-enriched air generated by the oxygen generator 1 to generate high-concentration oxygen-enriched air and oxygen-enriched nitrogen;

[0036] The membrane separation reflux pipeline 16 is connected to the membrane separation purification system 2 and the general oxygen generator 1. When the general oxygen generator 1 needs to be purged, the oxygen-rich nitrogen returns to the general oxygen generator 1 through the membrane separation reflux pipeline 16 to purge the adsorption tower;

[0037] The general oxygen production pipeline 3 is connected to the membrane separation and purification system 2 and the oxygen buffer tank 14, and the high-concentration oxygen-enriched air enters the oxygen buffer tank 14 through the general oxygen production pipeline 3;

[0038] The oxygen buffer tank 14 receives and stores the high-concentration oxygen-enriched air generated by the membrane separation and purification system 2 at its input end;

[0039] The pure oxygen inlet pipeline 13 is connected to the oxygen buffer tank 14 and the pure oxygen oxygen generator 7 to provide high-concentration oxygen-rich air to the pure oxygen oxygen generator 7;

[0040] The oxygen purge pipeline 15 is connected to the oxygen buffer tank 14 and the oxygen generator 1. When the oxygen generator 1 needs to be purged, the adsorption tower is purged;

[0041] The general oxygen delivery pipeline 11 is connected to the pure oxygen intake pipeline 13 and the use end, and is used to deliver high-concentration oxygen-enriched air to the first use end;

[0042] The pure oxygen generator 7 inputs high-concentration oxygen-enriched air from the pure oxygen inlet pipeline 13 to generate medical oxygen and waste gas;

[0043] A pure oxygen delivery pipeline 9 is connected to the pure oxygen generator 7 and the second user end, and is used to output medical oxygen to the second user end;

[0044] The waste gas recovery pipeline 6 is connected to the pure oxygen oxygen generator 7 and the general oxygen oxygen generator 1, and is used to transport the waste gas to the general oxygen oxygen generator 1 to purge the adsorption tower when the general oxygen oxygen generator 1 needs to be purged; and

[0045] The general oxygen-pure oxygen switching pipeline 10 with a valve is connected to the pure oxygen delivery pipeline 9 and the general oxygen delivery pipeline 11.

[0046] As an improvement of the above device, the device further comprises:

[0047] The pure oxygen concentration detection device 17 is connected to the pure oxygen delivery pipeline 9 and is used to detect the concentration of medical oxygen.

[0048] As an improvement of the above device, the device further comprises:

[0049] The unqualified pure oxygen gas discharge pipeline 8 is connected to the pure oxygen delivery pipeline 9 and is used to discharge the unqualified medical oxygen.

[0050] As an improvement of the above device, the device further comprises:

[0051] The general oxygen concentration detection device 4 is connected to the general oxygen production pipeline 3 and is used to detect the concentration of high-concentration oxygen-enriched air.

[0052] As an improvement of the above device, the device further comprises:

[0053] The first shuttle valve is arranged on the general oxygen purge pipeline 15 and is used to control the ventilation and closing of the general oxygen purge pipeline 15 .

[0054] As an improvement of the above device, the device further comprises:

[0055] The general oxygen unqualified gas discharge pipeline 12 is connected to the pure oxygen intake pipeline 13 and is used to discharge the high-concentration oxygen-rich air when it is unqualified.

[0056] As an improvement of the above device, the device further comprises:

[0057] The second shuttle valve is arranged on the exhaust gas recovery pipeline 6 and is used to control the ventilation and closing of the exhaust gas recovery pipeline 6.

[0058] As an improvement of the above device, the device further comprises:

[0059] The pure oxygen exhaust pipeline 5 is connected to the waste gas recovery pipeline 6 and is used to discharge the waste gas generated by the pure oxygen oxygen generator 7 when the general oxygen oxygen generator 1 does not need to be purged.

[0060] As an improvement of the above device, the device further comprises:

[0061] The one-way valve is arranged on the waste gas recovery pipeline 6 to prevent the gas in the oxygen generator 1 from flowing back.

[0062] Compared with the prior art, the advantages of this application are:

[0063] 1. This application can automatically switch the oxygen concentration according to the needs of the hospital, providing the hospital with both medical oxygen and oxygen-enriched air, or providing either one of them separately;

[0064] 2. This application adopts membrane separation oxygen production technology, and uses the high-concentration waste gas generated when membrane separation produces medical oxygen in the production process of oxygen-enriched air, optimizes the air-oxygen ratio, and uses less gas than the medical oxygen production system on the market;

[0065] 3. This application recovers the high-concentration oxygen contained in the waste gas rich in argon and nitrogen mainly discharged from the DC side during the production of medical oxygen, and uses it for the production of oxygen-enriched air, thereby improving production efficiency, reducing the amount of air required for the product, and achieving the effect of reducing energy consumption;

[0066] 4. Compared with oxygen production equipment that only uses molecular sieves, this application adds membrane separation for secondary purification to make the equipment more stable and ensure the quality of medical oxygen;

[0067] 5. Compared with oxygen production equipment that simply uses the membrane separation principle, due to the cost and durability issues of membrane materials, this application reduces the frequency of use of membrane materials, increases the service life of membrane materials, reduces the probability of damage to membrane materials during use, and saves equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 Shown is the structural diagram of a membrane separation oxygen production device that can simultaneously produce medical oxygen and oxygen-enriched air.

[0069] Figure ID:

[0070] 1. General oxygen generator 2. Membrane separation and purification system

[0071] 3. General oxygen production pipeline 4. General oxygen concentration detection equipment

[0072] 5. Pure oxygen exhaust pipeline 6. Waste gas recovery pipeline

[0073] 7. Pure oxygen generator 8. Exhaust pipeline for unqualified pure oxygen gas

[0074] 9. Pure oxygen delivery pipeline 10. General oxygen-pure oxygen switching pipeline

[0075] 11. General oxygen delivery pipeline 12. General oxygen unqualified gas discharge pipeline

[0076] 13. Pure oxygen intake pipeline 14. Oxygen buffer tank

[0077] 15. General oxygen purge pipeline 16. Membrane separation reflux pipeline

[0078] 17. Pure oxygen concentration detection equipment DETAILED DESCRIPTION

[0079] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0080] like Figure 1 As shown, the present application provides a membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air, comprising:

[0081] The oxygen generator main unit 1 inputs compressed air and generates oxygen-enriched air which is output to the membrane separation and purification system 2.

[0082] The membrane separation purification system 2 inputs the oxygen-enriched air generated by the general oxygen oxygen generator 1 to generate high-concentration oxygen-enriched air and oxygen-enriched nitrogen; when the general oxygen oxygen generator 1 needs to be purged, the oxygen-enriched nitrogen returns to the general oxygen oxygen generator 1 through the membrane separation reflux pipeline 16 to purge the adsorption tower; the high-concentration oxygen-enriched air enters the oxygen buffer tank 14 through the general oxygen production pipeline 3.

[0083] The general oxygen production pipeline 3 is provided with a general oxygen concentration detection device 4 for detecting the concentration of high-concentration oxygen-enriched air.

[0084] The oxygen buffer tank 14 receives and stores the high-concentration oxygen-enriched air generated by the membrane separation and purification system 2 at its input end, and provides high-concentration oxygen-enriched air to the pure oxygen oxygen generator 7 at its output end through the pure oxygen air intake pipeline 13. The oxygen buffer tank 14 is connected to the pure oxygen oxygen generator 1 through the pure oxygen purge pipeline 15. When the pure oxygen oxygen generator 1 needs to be purged, the adsorption tower is purged.

[0085] A first shuttle valve is provided on the general oxygen purge pipeline 15 for controlling the ventilation and closing of the general oxygen purge pipeline 15 .

[0086] The pure oxygen intake pipeline 13 is provided with an oxygen unqualified gas discharge pipeline 12 to discharge the gas when the high-concentration oxygen-rich air is unqualified.

[0087] The pure oxygen inlet pipeline 13 is also provided with a general oxygen delivery pipeline 11 for delivering high-concentration oxygen-enriched air to a user end, such as a ward.

[0088] The pure oxygen generator 7 inputs high-concentration oxygen-rich air from the pure oxygen inlet pipeline 13 to generate medical oxygen and waste gas. The medical oxygen is output to the user end, such as a ward, through the pure oxygen delivery pipeline 9. The waste gas is connected to the general oxygen generator 1 through the waste gas recovery pipeline 6. When the general oxygen generator 1 needs to be purged, the adsorption tower is purged.

[0089] A pure oxygen concentration detection device 17 is provided on the pure oxygen delivery pipeline 9 for detecting the concentration of medical oxygen.

[0090] The pure oxygen delivery pipeline 9 is also provided with a pure oxygen unqualified gas discharge pipeline 8, which is used to discharge unqualified medical oxygen.

[0091] A general oxygen-pure oxygen switching pipeline 10 with a valve is provided between the pure oxygen delivery pipeline 9 and the general oxygen delivery pipeline 11 , connecting the pure oxygen delivery pipeline 9 and the general oxygen delivery pipeline 11 .

[0092] A second shuttle valve is provided on the exhaust gas recovery pipeline 6 to control the ventilation and closing of the exhaust gas recovery pipeline 6 .

[0093] A pure oxygen exhaust pipeline 5 is also provided on the waste gas recovery pipeline 6, which is used to discharge the waste gas generated by the pure oxygen oxygen generator 7 when the general oxygen oxygen generator 1 does not need to be purged.

[0094] A one-way valve is also provided on the waste gas recovery pipeline 6 to prevent the gas in the oxygen generator 1 from flowing back.

[0095] In addition to shuttle valves and one-way valves, each pipeline in the device of the present application is also provided with a valve for controlling the opening and closing of the pipeline.

[0096] When producing oxygen-enriched gas, the clean and dry compressed air at the front end is transported to the main unit 1 of the oxygen generator 1 as raw gas and instrument air for separation. Compressed air is injected into a closed adsorption tower equipped with a molecular sieve in the main unit 1 of the oxygen generator 1, causing the pressure in the adsorption tower to increase accordingly. The molecular sieve therein absorbs a large amount of nitrogen in the compressed air as the ambient pressure increases, while the oxygen in the compressed air still exists in the form of gas and is collected through a certain pipeline. This process is usually called the "adsorption" process. When the molecular sieve in the container adsorbs nitrogen to the critical state of adsorption saturation, the adsorption tower is depressurized. As the ambient pressure decreases, the ability of the molecular sieve to adsorb nitrogen decreases, and the nitrogen is released back to the gas phase from the inside of the molecular sieve and discharged as waste gas. Because the automatic decompression process can only reduce the pressure in the tower to the standard atmospheric pressure, the nitrogen in the separation material cannot be completely discharged, and the finished oxygen-enriched air in the oxygen buffer tank 14 is required to "purge" the separation material. This process is usually called "desorption". The finished gas in the oxygen buffer tank 14 needs to be used during the purge process, resulting in a waste of finished gas, causing the air-oxygen ratio in the raw gas to be about 5:1, while the air-oxygen ratio of the produced oxygen-enriched air is about 11:1. In order to ensure the continuous and stable output of oxygen, the oxygen production system uses two molecular sieve adsorption towers, which are controlled by a control valve so that one adsorption tower is in the adsorption process while the other adsorption tower is in the desorption process. The two work alternately to complete the continuous oxygen-enriched process. Due to reasons such as separation materials and production processes, the oxygen concentration produced by the pressure swing adsorption principle is generally stable at 93%. The oxygen-enriched air produced by the general oxygen generator 1 enters the oxygen buffer tank 14 and is collected, and part of the oxygen-enriched air enters the general oxygen generator 1 to complete the "purge" of the separation material.

[0097] The oxygen-enriched air produced by the oxygen generator 1 is transported to the membrane separation purification system 2, which is divided into the permeation side (at the bottom of the membrane separator, opposite to the air inlet) and the low-pressure side (at the side end of the membrane separator). At this time, the oxygen-enriched air enters the raw gas inlet of the membrane separation purification system 2. After reaching the oxygen partial pressure separated by the membrane material through the membrane separation principle, high-concentration oxygen-enriched air is produced from the permeation side outlet of the membrane separator, and the concentration is stabilized at 96%. Oxygen-enriched nitrogen is discharged from the low-pressure side outlet of the membrane separator, with a concentration of more than 85%. The oxygen-enriched nitrogen is connected to the oxygen generator 1 through the membrane separation reflux pipeline 16. When the oxygen generator 1 is purged, the oxygen-enriched nitrogen automatically enters the adsorption tower for purging. When the oxygen generator 1 is not purged, the oxygen-enriched air is pressurized and purified in the membrane separation purification system 2.

[0098] High-concentration oxygen-enriched air enters the oxygen buffer tank 14 through the general oxygen production pipeline 3, and then enters the pure oxygen oxygen generator 7 through the pure oxygen intake pipeline 13, and then circulates and purifies through the membrane separator in the pure oxygen oxygen generator 7 for multiple times, that is, the gas is continuously pressurized by the circulation compressor, and returned to the membrane separator for purification, and argon and other gases are removed until 99.5% of medical oxygen is purified. The oxygen concentration in the waste gas generated during the purification of high-concentration oxygen-enriched air (concentration 96%) to medical oxygen is still relatively high, about 80%-93%. Therefore, the waste gas generated during the purification process will be monitored according to logic. When the general oxygen oxygen generator 1 is not purged, the waste gas is discharged into the air through the pure oxygen exhaust pipeline 5; when the general oxygen oxygen generator 1 is purged, the waste gas enters the general oxygen oxygen generator 1 through the waste gas recovery pipeline 6 to purge the separation material. Whether the waste gas enters the general oxygen oxygen generator 1 through the waste gas recovery pipeline 6 can be controlled by the system through the second shuttle valve on the waste gas recovery pipeline 6.

[0099] The device of the present application has a dual-pipeline design, which can deliver oxygen-enriched air and medical oxygen according to the oxygen demand of different wards in the hospital. When both oxygen-enriched air and medical oxygen are needed, the valves on the general oxygen delivery pipeline 11 and the pure oxygen delivery pipeline 9 can be opened at the same time; when only oxygen-enriched air is needed, the valves on the general oxygen delivery pipeline 11 and the general oxygen-switching pipeline 10 can be opened at the same time to supply oxygen-enriched air to all staff, or the valve on the general oxygen delivery pipeline 11 can be opened to supply only wards that need oxygen-enriched air; when only medical oxygen is needed, the valves on the pure oxygen delivery pipeline 9 and the general oxygen-switching pipeline 10 can be opened at the same time to supply medical oxygen to all staff, or the valve on the pure oxygen delivery pipeline 9 can be opened to supply only wards that need oxygen-enriched air.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present application does not depart from the spirit and scope of the technical solution of the present application and should be included in the scope of the claims of the present application.

Claims

1. A membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air, characterized in that: The device comprises: The oxygen generator 1 inputs compressed air and generates oxygen-enriched air which is then output to the membrane separation and purification system 2; The membrane separation and purification system 2 inputs the oxygen-enriched air generated by the oxygen generator 1 to generate high-concentration oxygen-enriched air and oxygen-enriched nitrogen; The membrane separation reflux pipeline 16 is connected to the membrane separation purification system 2 and the general oxygen generator 1. When the general oxygen generator 1 needs to be purged, the oxygen-rich nitrogen returns to the general oxygen generator 1 through the membrane separation reflux pipeline 16 to purge the adsorption tower; The general oxygen production pipeline 3 is connected to the membrane separation and purification system 2 and the oxygen buffer tank 14, and the high-concentration oxygen-enriched air enters the oxygen buffer tank 14 through the general oxygen production pipeline 3; The oxygen buffer tank 14 receives and stores the high-concentration oxygen-enriched air generated by the membrane separation and purification system 2 at its input end; The pure oxygen inlet pipeline 13 is connected to the oxygen buffer tank 14 and the pure oxygen oxygen generator 7 to provide high-concentration oxygen-rich air to the pure oxygen oxygen generator 7; The oxygen purge pipeline 15 is connected to the oxygen buffer tank 14 and the oxygen generator 1. When the oxygen generator 1 needs to be purged, the adsorption tower is purged; The general oxygen delivery pipeline 11 is connected to the pure oxygen intake pipeline 13 and the use end, and is used to deliver high-concentration oxygen-enriched air to the first use end; The pure oxygen generator 7 inputs high-concentration oxygen-enriched air from the pure oxygen inlet pipeline 13 to generate medical oxygen and waste gas; A pure oxygen delivery pipeline 9 is connected to the pure oxygen generator 7 and the second user end, and is used to output medical oxygen to the second user end; The waste gas recovery pipeline 6 is connected to the pure oxygen oxygen generator 7 and the general oxygen oxygen generator 1, and is used to transport the waste gas to the general oxygen oxygen generator 1 to purge the adsorption tower when the general oxygen oxygen generator 1 needs to be purged; and The general oxygen-pure oxygen switching pipeline 10 with a valve is connected to the pure oxygen delivery pipeline 9 and the general oxygen delivery pipeline 11.

2. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The pure oxygen concentration detection device 17 is connected to the pure oxygen delivery pipeline 9 and is used to detect the concentration of medical oxygen.

3. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The unqualified pure oxygen gas discharge pipeline 8 is connected to the pure oxygen delivery pipeline 9 and is used to discharge the unqualified medical oxygen.

4. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The general oxygen concentration detection device 4 is connected to the general oxygen production pipeline 3 and is used to detect the concentration of high-concentration oxygen-enriched air.

5. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The first shuttle valve is arranged on the general oxygen purge pipeline 15 and is used to control the ventilation and closing of the general oxygen purge pipeline 15 .

6. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The general oxygen unqualified gas discharge pipeline 12 is connected to the pure oxygen intake pipeline 13 and is used to discharge the high-concentration oxygen-rich air when it is unqualified.

7. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The second shuttle valve is arranged on the exhaust gas recovery pipeline 6 and is used to control the ventilation and closing of the exhaust gas recovery pipeline 6.

8. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The pure oxygen exhaust pipeline 5 is connected to the waste gas recovery pipeline 6 and is used to discharge the waste gas generated by the pure oxygen oxygen generator 7 when the general oxygen oxygen generator 1 does not need to be purged.

9. The membrane separation oxygen production device capable of simultaneously producing medical oxygen and oxygen-enriched air according to claim 1, characterized in that: The device also includes: The one-way valve is arranged on the waste gas recovery pipeline 6 to prevent the gas in the oxygen generator 1 from flowing back.

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