Medical oxygen generator

Abstract

The utility model belongs to the field of medical oxygen preparation, and particularly relates to a medical oxygen generator. The oxygen generator comprises a compressed air treatment device, a primary purification module, a primary purification oxygen buffer tank, a secondary purification module and a secondary purification oxygen buffer tank; an air outlet of the compressed air treatment device is connected with an air inlet of the primary purification module, a primary purification oxygen outlet of the primary purification module is connected with an inlet of the primary purification oxygen buffer tank, and an outlet of the primary purification oxygen buffer tank is connected with an inlet of the secondary purification module through a pure oxygen and common oxygen connecting pipe. And a secondary purification oxygen outlet of the secondary purification module is connected with an inlet of a secondary purification oxygen buffer tank. According to the medical oxygen generator, primary purification oxygen generation and secondary purification oxygen generation are integrated together to form a main machine, so that the preparation of medical oxygen can be realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical oxygen preparation, and particularly relates to a medical oxygen generator. BACKGROUND

[0002] The medical molecular sieve oxygen production system is a kind of gas source system for producing medical oxygen by enriching oxygen from air using the principle of molecular sieve pressure swing adsorption, which is mainly composed of air compression system, gas source purification system, air tank, medical molecular sieve adsorption separation system, circulating compressor, oxygen tank, control system, monitoring and alarm system and the like.Oxygen booster and flowmeter are optional components.

[0003] Generally, two oxygen generators are needed to produce 99.5% medical oxygen, which are 93% oxygen generator and 99.5% oxygen generator produced by secondary purification, and air buffer tank, oxygen buffer tank and other pressure vessels are needed. UTILITY MODEL CONTENT

[0004] The utility model discloses a medical oxygen generator, which integrates primary purification oxygen production and secondary purification oxygen production, and realizes the preparation of medical oxygen by one main machine.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A medical oxygen generator, the oxygen generator includes compressed air treatment device, primary purification module, primary purification oxygen buffer tank, secondary purification module, secondary purification oxygen buffer tank;

[0007] The air inlet of the primary purification module is connected with the air outlet of the compressed air treatment device, the primary purification oxygen outlet of the primary purification module is connected with the inlet of the primary purification oxygen buffer tank, the outlet of the primary purification oxygen buffer tank is connected with the inlet of the secondary purification module through the pure oxygen and oxygen connection pipe, and the secondary purification oxygen outlet of the secondary purification module is connected with the inlet of the secondary purification oxygen buffer tank.

[0008] Further, the compressed air treatment device includes an air compressor, an air-water separator, a freeze dryer, an air filter, an air buffer tank air filter module and an instrument air tank connected in sequence.

[0009] In the utility model, the instrument air tank provides control gas for the plurality of pneumatic shuttle valves.

[0010] Preferably, the air buffer tank, the primary purification oxygen buffer tank and the secondary purification oxygen buffer tank are composed of a plurality of aluminum tank separators;The plurality of aluminum tank separators are communicated by a gas collecting pipe.

[0011] The 99.5% medical oxygen generator provided by the utility model mainly consists of two parts, a primary purification module (general oxygen module) and a secondary purification module (pure oxygen module); one side of the main base is the general oxygen module, and the other side is the pure oxygen module; various tanks such as an air buffer tank, a separation tower and an oxygen buffer tank are arranged in the middle; and the two modules are connected through a pure oxygen general oxygen connecting pipeline.

[0012] The oxygen production principle of the 99.5% high-concentration oxygen of the utility model is as follows:

[0013] Air compression and air pretreatment equipment provide clean and dry compressed air as raw gas for separation and instrument air. The raw gas for separation is separated through two-stage pressure swing adsorption purification modules: the primary purification module removes nitrogen and a small amount of argon to obtain about 93% of enriched oxygen; the secondary purification module removes argon in the about 93% of enriched oxygen obtained by the primary purification module, and outputs qualified medical oxygen through process circulation and a booster, in the process, in order to obtain higher efficiency, the process circulation compressor can continuously pressurize the intermediate process gas again and return it to the purification module for purification, thereby effectively improving the total recovery rate of adsorption separation and efficiently obtaining 99.5% of medical oxygen.

[0014] The utility model also adopts an aluminum tank separator filled with expanded molecular sieve to increase the capacity of the aluminum tank, thereby saving space and eliminating large pressure vessels such as the air buffer tank and the oxygen buffer tank. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the medical oxygen generator of the utility model;

[0016] Figure 2 is a front view of the medical oxygen generator of the utility model;

[0017] Figure 3 is a side view of the primary purification module side of the medical oxygen generator of the utility model;

[0018] Figure 4 is a side view of the secondary purification module side of the medical oxygen generator of the utility model;

[0019] Figure 5 is a top view of the medical oxygen generator of the utility model;

[0020] Figure 6 is a principle structure diagram of the medical oxygen generator of the utility model;

[0021] Figure 7 is a structure diagram of the aluminum tank separator;

[0022] Figure 8 is Figure 7 a side view;

[0023] REFERENCE NUMERALS:

[0024] 1, air compressor; 2, air-water separator; 3, freeze dryer; 4, air filter; 5, air buffer tank; 6, air filter module; 7, primary purification module; 8, primary purified oxygen buffer tank; 9, secondary purification module; 10, secondary purified oxygen buffer tank; 11, oxygen production pipeline; 12, aluminum tank separator; 13, gas collecting pipe; 14, flat cover; 15, instrument air tank;

[0025] 7-1, first pneumatic shuttle valve; 7-2, second pneumatic shuttle valve; 7-3, third pneumatic shuttle valve; 7-4, fourth pneumatic shuttle valve; 7-5, fifth pneumatic shuttle valve; 7-6, sixth pneumatic shuttle valve; 7-7, seventh pneumatic shuttle valve; 7-8, eighth pneumatic shuttle valve; 7-9, ninth pneumatic shuttle valve; 7-10, tenth pneumatic shuttle valve; 7-11, first adsorption tower; 7-12, second adsorption tower; 7-13, first air release valve;

[0026] 9-1, eleventh pneumatic shuttle valve; 9-2, twelfth pneumatic shuttle valve; 9-3, thirteenth pneumatic shuttle valve; 9-4, fourteenth pneumatic shuttle valve; 9-5, fifteenth pneumatic shuttle valve; 9-6, sixteenth pneumatic shuttle valve; 9-7, seventeenth pneumatic shuttle valve; 9-8, eighteenth pneumatic shuttle valve; 9-9, nineteenth pneumatic shuttle valve; 9-10, twentieth pneumatic shuttle valve; 9-11, twenty-first pneumatic shuttle valve; 9-12, twenty-second pneumatic shuttle valve; 9-13, third adsorption tower; 9-14, fourth adsorption tower; 9-15, second air release valve; 9-16, circulating compressor. DETAILED DESCRIPTION

[0027] The technical scheme of the present application will be described in detail below in combination with the drawings and examples.

[0028] Example 1

[0029] As shown in Figures 1-2 and Figure 6 , a medical oxygen generator, the oxygen generator comprises a compressed air treatment device, a primary purification module 7, a primary purified oxygen buffer tank 8, a secondary purification module 9, a secondary purified oxygen buffer tank 10;

[0030] The air outlet of the compressed air treatment device is connected to the air inlet of the primary purification module 7, the primary purified oxygen outlet of the primary purification module 7 is connected to the inlet of the primary purified oxygen buffer tank 8, the outlet of the primary purified oxygen buffer tank 8 is connected to the inlet of the secondary purification module 9 through a pure oxygen and oxygen connection pipe, and the secondary purified oxygen outlet of the secondary purification module 9 is connected to the inlet of the secondary purified oxygen buffer tank 10.

[0031] As shown in Figure 6As shown, the compressed air processing device includes air compressor 1, air-water separator 2, freeze dryer 3, air filter 4, air buffer tank 5, air filter module 6 and instrument air tank 15 connected in sequence.

[0032] Wherein the air outlet of the air filter module 6 is divided into two air paths, one air path inputs the first purification module 7, and the other air path inputs the instrument air tank 15, which is used to provide control air for each pneumatic shuttle valve.

[0033] Air compressor 1, used to provide compressed air for the entire oxygen production system as a gas source component.

[0034] Air-water separator 2, used to separate most of the water contained in the compressed air.

[0035] Freeze dryer 3, used to reduce the temperature of compressed air and remove part of the water in the air.

[0036] Air filter 4 and air filter module 6, used to remove oil, water impurities, odors, etc. or remove odors, dust, etc. from the oxygen produced.

[0037] Air buffer tank 5, as a buffer tank for storing air, so that the system can obtain stable compressed air.

[0038] Instrument air tank 15: provides control air for the pneumatic elements of the entire system, i.e. shuttle valves.

[0039] As shown in Figure 3 and Figure 6 The first purification module 7 includes a first adsorption tower 7-11, a second adsorption tower 7-12, a first air release valve 7-13 and a plurality of pneumatic shuttle valves.

[0040] The plurality of pneumatic shuttle valves include: Figure 6 Vertically placed, therefore, Figure 6 Among them, the upper end of the pneumatic shuttle valve is the first connecting end, and the lower end is the second connecting end.

[0041] The first pneumatic shuttle valve 7-1 is connected to the compressed air processing device (the air outlet of the air filter module 6) at the first connecting end, and is connected to the inlet of the first adsorption tower 7-11 and the second connecting end of the second pneumatic shuttle valve 7-2 at the second connecting end.

[0042] The second pneumatic shuttle valve 7-2 is connected to the second connecting end of the first pneumatic shuttle valve 7-1 and the inlet of the first adsorption tower 7-11 at the second connecting end, and is connected to the first air release valve 7-13 and the second connecting end of the seventh pneumatic shuttle valve 7-7 at the first connecting end.

[0043] The sixth pneumatic shuttle valve 7-6 has its second connection end connected with the compressed air processing device (the air outlet of the air filter module 6) and the first connection end of the first pneumatic shuttle valve 7-1, and the first connection end is connected with the inlet of the second adsorption tower 7-12 and the first connection end of the seventh pneumatic shuttle valve 7-7 and the first connection end of the third pneumatic shuttle valve 7-3;

[0044] The seventh pneumatic shuttle valve 7-7 has its first connection end connected with the first connection end of the sixth pneumatic shuttle valve 7-6 and the inlet of the second adsorption tower 7-12, and the second connection end is connected with the first exhaust valve 7-13 and the first connection end of the second pneumatic shuttle valve 7-2;

[0045] The third pneumatic shuttle valve 7-3 has its first connection end connected with the first connection end of the sixth pneumatic shuttle valve 7-6 and the inlet of the second adsorption tower 7-12 and the first connection end of the seventh pneumatic shuttle valve 7-7, and the second connection end is connected with the outlet of the first adsorption tower 7-11, the second connection end of the fourth pneumatic shuttle valve 7-4 and the second connection end of the fifth pneumatic shuttle valve 7-5;

[0046] The eighth pneumatic shuttle valve 7-8 has its second connection end connected with the second connection end of the first pneumatic shuttle valve 7-1 and the inlet of the first adsorption tower 7-11, and the first connection end is connected with the outlet of the second adsorption tower 7-12, the first connection end of the ninth pneumatic shuttle valve 7-9 and the first connection end of the tenth pneumatic shuttle valve 7-10;

[0047] The fourth pneumatic shuttle valve 7-4 has its second connection end connected with the outlet of the first adsorption tower 7-11, and the first connection end is connected with the inlet of the primary purified oxygen buffer tank 8;

[0048] The ninth pneumatic shuttle valve 7-9 has its first connection end connected with the outlet of the second adsorption tower 7-12, and the second connection end is connected with the inlet of the primary purified oxygen buffer tank 8;

[0049] The fifth pneumatic shuttle valve 7-5 has its second connection end connected with the outlet of the first adsorption tower 7-11, and the first connection end is connected with the inlet of the primary purified oxygen buffer tank 8;

[0050] The tenth pneumatic shuttle valve 7-10 has its first connection end connected with the outlet of the second adsorption tower 7-12, and the second connection end is connected with the inlet of the primary purified oxygen buffer tank 8.

[0051] As shown in Figure 4 and Figure 6 The secondary purification module includes a third adsorption tower 9-13, a fourth adsorption tower 9-14, a second exhaust valve 9-15, a circulating compressor 9-16 and a plurality of pneumatic shuttle valves;

[0052] The plurality of pneumatic shuttle valves include:

[0053] eleventh pneumatic shuttle valve 9-1, whose first connecting end is connected with the outlet of the primary purified oxygen buffer tank 8, and whose second connecting end is connected with the inlet of the third adsorption tower 9-13;

[0054] seventeenth pneumatic shuttle valve 9-7, whose second connecting end is connected with the outlet of the primary purified oxygen buffer tank 8, and whose first connecting end is connected with the inlet of the fourth adsorption tower 9-14;

[0055] twelfth pneumatic shuttle valve 9-2, whose second connecting end is connected with the second connecting end of the eleventh pneumatic shuttle valve 9-1 and the inlet of the third adsorption tower 9-13, and whose first connecting end is connected with the oxygen suction port of the circulating compressor 9-16;

[0056] eighteenth pneumatic shuttle valve 9-8, whose first connecting end is connected with the first connecting end of the seventeenth pneumatic shuttle valve 9-7 and the inlet of the fourth adsorption tower 9-14, and whose second connecting end is connected with the oxygen suction port of the circulating compressor 9-16;

[0057] thirteenth pneumatic shuttle valve 9-3, whose second connecting end is connected with the second connecting end of the twelfth pneumatic shuttle valve 9-2 and the inlet of the third adsorption tower 9-13, and whose first connecting end is connected with the oxygen delivery port of the circulating compressor 9-16;

[0058] nineteenth pneumatic shuttle valve 9-9, whose first connecting end is connected with the first connecting end of the eighteenth pneumatic shuttle valve 9-8, and whose second connecting end is connected with the oxygen delivery port of the circulating compressor 9-16 and the second connecting end of the twenty-second pneumatic shuttle valve 9-12;

[0059] fourteenth pneumatic shuttle valve 9-4, whose second connecting end is connected with the inlet of the third adsorption tower 9-13, and whose first connecting end is connected with the outlet of the fourth adsorption tower 9-14;

[0060] twentieth pneumatic shuttle valve 9-10, whose first connecting end is connected with the inlet of the fourth adsorption tower 9-14, and whose second connecting end is connected with the outlet of the third adsorption tower 9-13;

[0061] fifteenth pneumatic shuttle valve 9-5, whose second connecting end is connected with the outlet of the third adsorption tower 9-13, and whose first connecting end is connected with the second gas release valve 9-15;

[0062] twenty-first pneumatic shuttle valve 9-11, whose first connecting end is connected with the outlet of the fourth adsorption tower 9-14, and whose second connecting end is connected with the second gas release valve 9-15;

[0063] sixteenth pneumatic shuttle valve 9-6, whose first connecting end is connected with the oxygen suction port of the circulating compressor 9-16, and whose second connecting end is connected with the inlet of the secondary purified oxygen buffer tank 10;

[0064] The second twenty-two pneumatic shuttle valve 9-12, its first connection end is connected with the oxygen outlet of the circulating compressor 9-16, the first connection end of the thirteenth pneumatic shuttle valve 9-3 and the second connection end of the nineteenth pneumatic shuttle valve 9-9, and the second connection end is connected with the inlet of the secondary purification oxygen buffer tank 10.

[0065] The outlet of the secondary purification oxygen buffer tank 10 is connected with an oxygen production pipeline, and the oxygen production pipeline can comprise a filter, an off-gas exhaust device, an oxygen booster, an oxygen storage tank, a filter and a mass flow meter connected in sequence.

[0066] In the utility model, the instrument gas tank is used to provide control gas for the plurality of pneumatic shuttle valves in the primary purification module and the secondary purification module. The plurality of pneumatic shuttle valves are connected through a loose joint and a pipeline. The loose joint is a connecting piece for connecting two ends of a stainless steel pipeline, and the interfaces of each component can be threadedly connected and then welded through the stainless steel pipeline.

[0067] As shown in Figure 7 and Figure 8 The air buffer tank 5, the primary purification oxygen buffer tank 8 and the secondary purification oxygen buffer tank 10 are each composed of a plurality of aluminum tank separators 12. The plurality of aluminum tank separators 12 are connected through a gas collecting pipe 13. Each aluminum tank separator comprises an aluminum tank body and a flat cover 14. The flat cover 14 is arranged on the aluminum tank body, and the middle gas outlet is connected with the gas collecting pipe.

[0068] As shown in Figure 6 The working principle of the utility model is as follows:

[0069] 1. Front-end treatment of compressed air

[0070] The air compressor 1 provides compressed air for the entire system. The compressed air is filtered through air-water separators 2, freeze-drying machines 3, air filters 4, air buffer tanks 5 and air filter modules 6 and other air pretreatment devices to remove water, oil and other impurities and foreign matter.

[0071] 2. Compressed air enters the air buffer tank

[0072] After filtration, the air enters the air buffer tank 5 in the oxygen generator host through the air inlet. The air buffer tank 5 is composed of aluminum tank separators. The aluminum tank separators are filled with expanded molecular sieve (air) inside. The volume of the gas contained in the aluminum tank separator can be expanded to about 2.5 times. The aluminum tank separator can replace the pressure vessel, solving the problems of large occupation of land, inconvenience of movement and non-uniform connection mode of the large pressure vessel.

[0073] 3. Compressed air enters the primary purification module from the air buffer tank and starts purification

[0074] Compressed gas from air buffer tank 5 enters the primary purification module 7 through the air filter module 6. The primary purification module 7 is composed of adsorption towers and pipeline components. The adsorption towers are divided into a first adsorption tower 7-11 and a second adsorption tower 7-12. The adsorption towers are composed of aluminum tank separator filled with gas separation materials. When compressed air passes through the gas separation materials, the gas separation materials will adsorb nitrogen and allow oxygen to pass through. The pipeline components are mainly composed of stainless steel pipelines and several pneumatic shuttle valves, which control the flow direction of compressed air, oxygen and nitrogen.

[0075] First adsorption tower oxygen production:

[0076] Pressure equalization stage: the eighth pneumatic shuttle valve 7-8 is connected, and the oxygen in the second adsorption tower 7-12 flows to the first adsorption tower 7-11.

[0077] Feed exhaust stage: the first pneumatic shuttle valve 7-1 is connected, the upper part of the first adsorption tower 7-11 is fed with air; the seventh pneumatic shuttle valve 7-7 is connected, the upper part of the second adsorption tower 7-12 is exhausted with nitrogen, and the nitrogen is discharged from the oxygen generator main machine through the first exhaust valve 7-13; the fifth pneumatic shuttle valve 7-5 is connected, and the oxygen in the primary purification oxygen buffer tank 8 enters the first adsorption tower 7-11.

[0078] Feed oxygen production stage: the first pneumatic shuttle valve 7-1 is connected, the upper part of the first adsorption tower 7-11 is fed with air; the seventh pneumatic shuttle valve 7-7 is connected, the upper part of the second adsorption tower 7-12 is exhausted with nitrogen, and the nitrogen is discharged from the oxygen generator main machine through the first exhaust valve 7-13; the fifth pneumatic shuttle valve 7-5 is connected, and the lower part of the first adsorption tower 7-11 transports oxygen to the primary purification oxygen buffer tank 8.

[0079] Oxygen production cleaning stage: the first pneumatic shuttle valve 7-1 is connected, the upper part of the first adsorption tower 7-11 is fed with air; the seventh pneumatic shuttle valve 7-7 is connected, the upper part of the second adsorption tower 7-12 is exhausted with nitrogen, and the nitrogen is discharged from the oxygen generator main machine through the first exhaust valve 7-13; the fifth pneumatic shuttle valve 7-5 is connected, and the lower part of the first adsorption tower 7-11 transports oxygen to the primary purification oxygen buffer tank 8; the tenth pneumatic shuttle valve 7-10 is connected, and the oxygen in the primary purification oxygen buffer tank 8 enters the second adsorption tower 7-12, which improves the release of nitrogen in the second adsorption tower 7-12 through the injected oxygen, and completes the cleaning of the second adsorption tower 7-12.

[0080] Second adsorption tower oxygen production:

[0081] Pressure equalization stage: the third pneumatic shuttle valve 7-3 is connected, and the oxygen in the first adsorption tower 7-11 flows to the second adsorption tower 7-12.

[0082] Feed exhaust phase: the sixth pneumatic shuttle valve 7-6 is connected, and the upper part of the second adsorption tower 7-12 is fed with air; the second pneumatic shuttle valve 7-2 is connected, and the upper part of the first adsorption tower 7-11 is discharged with nitrogen, and the nitrogen is discharged from the oxygen generator main machine through the first exhaust valve 7-13; the tenth pneumatic shuttle valve 7-10 is connected, and the oxygen in the primary purification oxygen buffer tank 8 enters the second adsorption tower 7-12.

[0083] Feed oxygen production phase: the sixth pneumatic shuttle valve 7-6 is connected, and the upper part of the second adsorption tower 7-12 is fed with air; the second pneumatic shuttle valve 7-2 is connected, and the upper part of the first adsorption tower 7-11 is discharged with nitrogen, and the nitrogen is discharged from the oxygen generator main machine through the first exhaust valve 7-13; the tenth pneumatic shuttle valve 7-10 is connected, and the lower part of the second adsorption tower 7-12 transports oxygen to the primary purification oxygen buffer tank 8.

[0084] Oxygen production cleaning phase: the sixth pneumatic shuttle valve 7-6 is connected, and the upper part of the second adsorption tower 7-12 is fed with air; the second pneumatic shuttle valve 7-2 is connected, and the upper part of the first adsorption tower 7-11 is discharged with nitrogen, and the nitrogen is discharged from the oxygen generator main machine through the first exhaust valve 7-13; the tenth pneumatic shuttle valve 7-10 is connected, and the lower part of the second adsorption tower 7-12 transports oxygen to the primary purification oxygen buffer tank 8; the fifth pneumatic shuttle valve 7-5 is connected, and the oxygen in the primary purification oxygen buffer tank 8 enters the first adsorption tower 7-11, and the release of nitrogen in the first adsorption tower 7-11 is improved by the injected oxygen, and the cleaning of the first adsorption tower 7-11 is completed.

[0085] 4, primary purified oxygen into the primary purified oxygen buffer tank

[0086] After the compressed gas is initially purified in the primary purification module 7, it enters the primary purified oxygen buffer tank 8. The primary purified oxygen buffer tank 8 is composed of an aluminum tank separator. The aluminum tank separator is composed of a plurality of aluminum tanks, a flat cover and a gas collection tank, and is internally filled with expanded molecular sieve (oxygen). The volume of the gas contained in the aluminum tank separator can be expanded to about 2.5 times. The aluminum tank separator can replace the pressure container, solving the problems of large pressure containers, such as large occupation of land, inconvenience of movement and non-uniform connection mode.

[0087] 5, from the primary purified oxygen buffer tank to the secondary purification module

[0088] The primary purified oxygen from the primary purified oxygen buffer tank 8 enters the secondary purification module 9 through the pure oxygen and oxygen connection pipe. The primary purified oxygen is used as the raw gas for secondary purification.

[0089] After the primary purified oxygen enters the secondary purification module, it is subjected to secondary purification.

[0090] The secondary purification oxygen module 9 (99.5%) is divided into two stages:

[0091] Adsorption occurs in the third adsorption tower (9-13), followed by desorption in the fourth adsorption tower (9-14). This process is repeated alternately.

[0092] The adsorption process in the third adsorption tower (9-13) and the desorption process in the fourth adsorption tower (9-14) consist of four steps:

[0093] First step: The eleventh pneumatic shuttle valve 9-1 is opened, and oxygen-enriched air enters the third adsorption tower 9-13. The eighteenth pneumatic shuttle valve 9-8 and the twenty-second pneumatic shuttle valve 9-12 are opened, and the pure oxygen from the fourth adsorption tower 9-14 enters the circulating compressor 9-16 after passing through the eighteenth pneumatic shuttle valve 9-8, and then enters the secondary purified oxygen buffer tank 10 from the circulating compressor through the twenty-second pneumatic shuttle valve 9-12.

[0094] Step 2: The 13th pneumatic shuttle valve 9-3, the 18th pneumatic shuttle valve 9-8, and the 22nd pneumatic shuttle valve 9-12 are activated. Pure oxygen from the fourth adsorption tower 9-14 enters the circulating compressor 9-16 after passing through the 18th pneumatic shuttle valve 9-8. After exiting the circulating compressor 9-16, it splits into two paths. One path passes through the 22nd pneumatic shuttle valve 9-12 and enters the secondary purified oxygen buffer tank 10. The other path passes through the 13th pneumatic shuttle valve 9-3 and enters the third adsorption tower 9-13. The 15th pneumatic shuttle valve 9-5 is activated, and argon gas is discharged from the third adsorption tower 9-13 via the 15th pneumatic shuttle valve 9-5.

[0095] Step 3: The fourteenth pneumatic shuttle valve 9-4 and the sixteenth pneumatic shuttle valve 9-6 are activated. Oxygen from the secondary purified oxygen buffer tank 10 enters the circulating compressor 9-16 through the sixteenth pneumatic shuttle valve 9-6. From the circulating compressor 9-16, it enters the third adsorption tower 9-13 through the thirteenth pneumatic shuttle valve 9-3, cleaning the third adsorption tower 9-13. The fifteenth pneumatic shuttle valve 9-5 is activated, and argon gas is discharged from the third adsorption tower 9-13 through the fifteenth pneumatic shuttle valve 9-5.

[0096] Step 4: The twentieth pneumatic shuttle valve 9-10 is activated, and the pressure from the third adsorption tower 9-13 to the fourth adsorption tower 9-14 is equalized. The sixteenth pneumatic shuttle valve 9-6 and the twenty-second pneumatic shuttle valve 9-12 are activated, and the circulating compressor 9-16 self-circulates. When the pressure in the circulating compressor 9-16 is too high, its bypass vent valve opens to achieve safe pressure relief.

[0097] The adsorption process in the fourth adsorption tower and the desorption process in the third adsorption tower are divided into four steps:

[0098] First step: the seventeenth pneumatic shuttle valve 9-7 is turned on, and the fourth adsorption tower 9-14 is fed with oxygen-rich air. The twelfth pneumatic shuttle valve 9-2 and the twenty-second pneumatic shuttle valve 9-12 are turned on, and the pure oxygen in the third adsorption tower 9-13 is fed into the circulating compressor 9-16 through the twelfth pneumatic shuttle valve 9-2, and then into the secondary purification oxygen buffer tank 10 through the twenty-second pneumatic shuttle valve 9-12.

[0099] Second step: the nineteenth pneumatic shuttle valve 9-9, the twelfth pneumatic shuttle valve 9-2, and the twenty-second pneumatic shuttle valve 9-12 are turned on, and the pure oxygen in the third adsorption tower 9-13 is fed into the circulating compressor 9-16 through the twelfth pneumatic shuttle valve 9-2. After coming out of the circulating compressor 9-16, it is divided into two paths. One path is fed into the oxygen pipe through the twenty-second pneumatic shuttle valve 9-12. The other path is fed into the fourth adsorption tower 9-14 through the nineteenth pneumatic shuttle valve 9-9. The twenty-first pneumatic shuttle valve 9-11 is turned on, and the fourth adsorption tower 9-14 is discharged of argon gas through the twenty-first pneumatic shuttle valve 9-11.

[0100] Third step: the nineteenth pneumatic shuttle valve 9-10 and the sixteenth pneumatic shuttle valve 9-6 are turned on, and the oxygen in the secondary purification oxygen buffer tank 10 is fed into the circulating compressor 9-16 through the sixteenth pneumatic shuttle valve 9-6. The oxygen is fed into the fourth adsorption tower 9-14 through the nineteenth pneumatic shuttle valve 9-9 from the circulating compressor 9-16, and the fourth adsorption tower 9-14 is cleaned. The twenty-first pneumatic shuttle valve 9-11 is turned on, and the fourth adsorption tower 9-14 is discharged of argon gas through the twenty-first pneumatic shuttle valve 9-11.

[0101] Fourth step: the fourteenth pneumatic shuttle valve 9-4 is turned on, and the fourth adsorption tower 9-14 is pressure equalized to the third adsorption tower 9-13. The sixteenth pneumatic shuttle valve 9-6 and the twenty-second pneumatic shuttle valve 9-12 are turned on, and the circulating compressor 9-16 is self-circulated. When the pressure of the circulating compressor 9-16 is too high, the air release valve in the bypass is opened to realize safe pressure relief.

[0102] 6, secondary purified oxygen enters the secondary purified oxygen buffer tank

[0103] The secondary purified oxygen buffer tank 10 is composed of an aluminum tank separator. A one-way valve is arranged between the inlet end and the outlet end of the secondary purified oxygen buffer tank to prevent oxygen from flowing back into the secondary purification module.

[0104] 7, oxygen production pipeline

[0105] The high-concentration oxygen after secondary purification flows to the next stage through the oxygen production pipeline 11, which can include filters, off-gas exhaust devices, oxygen boosters, oxygen storage tanks, filters, mass flow meters, pressure reducing valves, throttle valves, pneumatic shuttle valves and various other valves connected in sequence. The filters in the oxygen production pipeline 11 are used to filter dust and other impurities in the high-concentration oxygen, and the pressure reducing valves and throttle valves are used to stabilize the pressure and flow rate of the high-concentration oxygen. The sampling port is used to detect the concentration of the high-concentration oxygen. When the oxygen concentration does not reach the expected concentration of 99.5%, the off-gas exhaust device is opened. The off-gas exhaust device can include throttle valves and pneumatic shuttle valves. When the oxygen concentration reaches the expected 99.5%, the high-concentration oxygen flows to the next stage normally.

[0106] The contents not described in detail in the present application can adopt the conventional technical knowledge in the field.

[0107] Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the examples, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present application do not deviate from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A medical oxygen generator, characterized by comprising: The oxygen generator comprises a compressed air treatment device, a primary purification module, a primary purified oxygen buffer tank, a secondary purification module, and a secondary purified oxygen buffer tank. An air outlet of the compressed air treatment device is connected to an air inlet of the primary purification module, a primary purified oxygen outlet of the primary purification module is connected to an inlet of the primary purified oxygen buffer tank, an outlet of the primary purified oxygen buffer tank is connected to an inlet of the secondary purification module through a pure oxygen general oxygen connecting pipe, and a secondary purified oxygen outlet of the secondary purification module is connected to an inlet of the secondary purified oxygen buffer tank.

2. The medical oxygen generator as claimed in claim 1, wherein The compressed air treatment device comprises, in sequence, an air compressor, an air-water separator, a refrigerated dryer, an air filter, an air buffer tank, an air filter module, and an instrument air tank.

3. The medical oxygen generator as claimed in claim 1, wherein The primary purification module comprises a first adsorption tower, a second adsorption tower, a first air release valve, and a plurality of pneumatic shuttle valves. The plurality of pneumatic shuttle valves comprise: A first pneumatic shuttle valve, whose first connection end is connected to the compressed air treatment device, and whose second connection end is connected to an inlet of the first adsorption tower; A second pneumatic shuttle valve, whose second connection end is connected to the second connection end of the first pneumatic shuttle valve and the inlet of the first adsorption tower, and whose first connection end is connected to the first air release valve; A sixth pneumatic shuttle valve, whose second connection end is connected to the compressed air treatment device, and whose first connection end is connected to an inlet of the second adsorption tower; A seventh pneumatic shuttle valve, whose first connection end is connected to the first connection end of the sixth pneumatic shuttle valve and the inlet of the second adsorption tower, and whose second connection end is connected to the first air release valve; A third pneumatic shuttle valve, whose first connection end is connected to the first connection end of the sixth pneumatic shuttle valve and the inlet of the second adsorption tower, and whose second connection end is connected to an outlet of the first adsorption tower; An eighth pneumatic shuttle valve, whose second connection end is connected to the second connection end of the first pneumatic shuttle valve and the inlet of the first adsorption tower, and whose first connection end is connected to an outlet of the second adsorption tower; A fourth pneumatic shuttle valve, whose second connection end is connected to the outlet of the first adsorption tower, and whose first connection end is connected to an inlet of the primary purified oxygen buffer tank; A ninth pneumatic shuttle valve, whose first connection end is connected to the outlet of the second adsorption tower, and whose second connection end is connected to the inlet of the primary purified oxygen buffer tank; A fifth pneumatic shuttle valve, whose second connection end is connected to the outlet of the first adsorption tower, and whose first connection end is connected to the inlet of the primary purified oxygen buffer tank; A tenth pneumatic shuttle valve, whose first connection end is connected to the outlet of the second adsorption tower, and whose second connection end is connected to the inlet of the primary purified oxygen buffer tank.

4. The medical oxygen generator as claimed in claim 1, wherein The secondary purification module comprises a third adsorption tower, a fourth adsorption tower, a second air release valve, a circulating compressor, and a plurality of pneumatic shuttle valves. The plurality of pneumatic shuttle valves comprise: An eleventh pneumatic shuttle valve, whose first connection end is connected to an outlet of the primary purified oxygen buffer tank, and whose second connection end is connected to an inlet of the third adsorption tower; A seventeenth pneumatic shuttle valve, whose first connection end is connected to the outlet of the primary purified oxygen buffer tank, and whose second connection end is connected to the fourth adsorption tower; A twelfth pneumatic shuttle valve, whose first connection end is connected to the second connection end of the eleventh pneumatic shuttle valve and the inlet of the third adsorption tower, and whose second connection end is connected to an oxygen suction port of the circulating compressor; The eighteenth pneumatic shuttle valve has a first connecting end connected with the second connecting end of the seventeenth pneumatic shuttle valve and the inlet of the fourth adsorption tower, and a second connecting end connected with the oxygen suction port of the circulating compressor; The thirteenth pneumatic shuttle valve has a first connecting end connected with the first connecting end of the twelfth pneumatic shuttle valve, and a second connecting end connected with the oxygen supply port of the circulating compressor; The nineteenth pneumatic shuttle valve has a first connecting end connected with the first connecting end of the eighteenth pneumatic shuttle valve, and a second connecting end connected with the oxygen supply port of the circulating compressor and the second connecting end of the twenty-second pneumatic shuttle valve; The fourteenth pneumatic shuttle valve has a second connecting end connected with the inlet of the third adsorption tower, and a first connecting end connected with the outlet of the fourth adsorption tower; The twentieth pneumatic shuttle valve has a first connecting end connected with the inlet of the fourth adsorption tower, and a second connecting end connected with the outlet of the third adsorption tower; The fifteenth pneumatic shuttle valve has a second connecting end connected with the outlet of the third adsorption tower, and a first connecting end connected with the second gas discharge valve; The twenty-first pneumatic shuttle valve has a first connecting end connected with the outlet of the fourth adsorption tower, and a second connecting end connected with the second gas discharge valve; The sixteenth pneumatic shuttle valve has a first connecting end connected with the oxygen supply port of the circulating compressor, and a second connecting end connected with the inlet of the secondary-purified oxygen buffer tank; The twenty-second pneumatic shuttle valve has a first connecting end connected with the outlet of the circulating compressor, and a second connecting end connected with the inlet of the secondary-purified oxygen buffer tank.

5. The medical oxygen generator as claimed in claim 3 or 4, characterized in that The pneumatic shuttle valves are connected through joints and pipelines.

6. The medical oxygen generator as claimed in claim 1, wherein The air buffer tank, the primary-purified oxygen buffer tank and the secondary-purified oxygen buffer tank each comprise a plurality of aluminum tank separators.

7. The medical oxygen generator as claimed in claim 1, wherein The intermediate of the medical oxygen generator is integrally provided with a compressed air treatment device, a primary-purified oxygen buffer tank and a secondary-purified oxygen buffer tank; the primary-purification module and the secondary-purification module are respectively arranged on the two sides of the oxygen generator.

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