An apparatus for improving oxygen generation efficiency and its usage method

Abstract

The present invention discloses a device for improving oxygen production efficiency, which comprises an air compressor, a turbine and impeller device, an oxygen production device, a one-way valve, and an oxygen tank that are connected in sequence; the turbine and impeller device consists of two independent sealed housings, and a turbine and an impeller are respectively arranged in the two sealed housings. The turbine and the impeller are coaxially connected. The two sealed housings are respectively provided with independent air inlets and air outlets, namely a turbine end air inlet, a turbine end air outlet, an impeller end air inlet, and an impeller end air outlet. The present invention also provides a method for using the device for improving oxygen production efficiency. The present invention changes the operation in the prior art of leading out oxygen from the oxygen tank to desorb and purge the molecular sieve, and does not add a vacuum device for desorption operation. Instead, it utilizes the air flow kinetic energy in the intake pipeline to drive the impeller to rotate, and the impeller rotates in the sealed housing to generate negative pressure for negative pressure desorption, thereby improving the oxygen production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of oxygen generation, and particularly relates to a device for improving oxygen generation efficiency and a method for using the same. Background Art

[0002] People pay more and more attention to respiratory diseases, which has led to the booming development of respiratory health-related products such as oxygen generators and ventilators. However, the oxygen generator industry is a relatively small-scale industry with limited available accessories, resulting in slow development of oxygen generation technology.

[0003] Most existing oxygen generators use the PSA oxygen generation principle to produce oxygen, and the process is generally: pressurization, adsorption, desorption, cleaning; a small part also uses the VPSA oxygen generation principle to produce oxygen, and the process is generally: pressurization, adsorption, desorption, vacuum. It can be seen that the last step of the VPSA oxygen generation principle uses vacuum to replace the cleaning process in the PSA oxygen generation principle, which greatly improves the oxygen generation efficiency. However, using vacuum to replace the cleaning process requires adding vacuum equipment, that is, a vacuum pump. Due to the setting of the vacuum equipment, the energy consumption is increased, and the added vacuum equipment also increases the equipment cost, increasing the energy consumption of the whole machine while improving the oxygen generation efficiency.

[0004] Therefore, in the PSA oxygen generation principle of the prior art, using finished oxygen to backflush and clean the adsorption tower during the oxygen generation process, that is, taking out a part of the finished gas for backflushing and cleaning, is the reason for the reduction of oxygen generation efficiency. In the VPSA oxygen generation principle of the prior art, vacuum equipment is added, and the adsorption tower is made to complete the cleaning and desorption process by using the vacuum equipment to pump negative pressure, which also increases the energy consumption. Summary of the Invention

[0005] The present invention aims at the above problems, makes up for the deficiencies of the prior art, and provides a device for improving oxygen generation efficiency, including an air compressor, a turbine and impeller device, an oxygen generation device, a one-way valve, and an oxygen tank that are connected in sequence;

[0006] The turbine and impeller device consists of two independent sealed shells. A turbine and an impeller are respectively arranged in the two sealed shells. The turbine and the impeller are coaxially connected. The two sealed shells are respectively provided with independent air inlets and air outlets, namely a turbine-end air inlet, a turbine-end air outlet, an impeller-end air inlet, and an impeller-end air outlet;

[0007] The oxygen generation device includes a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a first adsorption tower, and a second adsorption tower; the first adsorption tower is provided with a first air passage and a second air passage, the fifth valve is arranged on the first air passage, one end of the second air passage is provided with two branch air passages, and the first valve and the third valve are respectively arranged on the two branch air passages, and the first valve and the third valve are in parallel; the second adsorption tower is provided with a third air passage and a fourth air passage, the sixth valve is arranged on the third air passage, one end of the fourth air passage is provided with two branch air passages, and the second valve and the fourth valve are respectively arranged on the two branch air passages, and the second valve and the fourth valve are in parallel;

[0008] The inlet of the turbine end is communicated with the air compressor, and the outlet of the turbine end is communicated with the first valve and the second valve, and the first valve and the second valve are in parallel; the inlet of the impeller end is communicated with the third valve and the fourth valve, and the third valve and the fourth valve are in parallel.

[0009] Preferably, the device for improving the oxygen generation efficiency further includes a silencer, and the silencer is communicated with the outlet of the impeller end.

[0010] Preferably, a pressure gauge and a pressure sensor are arranged in the first adsorption tower.

[0011] Preferably, the first adsorption tower is provided with a molecular sieve for adsorbing nitrogen.

[0012] Preferably, the oxygen tank is provided with a flow meter and a pressure gauge.

[0013] Preferably, a pressure gauge and a pressure sensor are arranged in the second adsorption tower.

[0014] Preferably, the second adsorption tower is provided with a molecular sieve for adsorbing nitrogen.

[0015] Another object of the present invention is to provide a method for using the device for improving the oxygen generation efficiency as described above, and the specific steps are as follows:

[0016] ① Turn on the air compressor, the air forms compressed air after passing through the air compressor, the compressed air enters the turbine of the turbine and impeller device, and the compressed air pushes the turbine to rotate, and the rotation of the turbine drives the impeller to rotate;

[0017] ② The first adsorption tower generates oxygen, and the second adsorption tower desorbs: open the first valve, the compressed air enters the first adsorption tower, and the nitrogen in the compressed air is adsorbed by the first adsorption tower; open the fifth valve, open the one-way valve, and the oxygen in the compressed air enters the oxygen tank; at the same time, open the fourth valve, since the rotation of the turbine drives the impeller to rotate, the impeller rotates in the sealed housing to generate negative pressure, so as to perform negative pressure desorption; it is necessary to confirm that the third valve, the second valve, and the sixth valve are in the closed state during the operation;

[0018] ③Oxygen production in the second adsorption tower and desorption in the first adsorption tower: When the pressure in the second adsorption tower reaches 0.1 - 0.6 MPa, close the first valve and the fifth valve, stop oxygen production in the first adsorption tower, and close the fourth valve; at the same time, open the second valve and the sixth valve, and the second adsorption tower starts to produce oxygen; open the third valve, and the first adsorption tower starts to desorb;

[0019] ④When the pressure in the first adsorption tower reaches 0.1 - 0.6 MPa, repeat the operation in step ②, and then perform the operation in step ③. The operations in step ② and step ③ are cycled alternately to achieve the purpose of continuous oxygen production until the oxygen production work is completed.

[0020] In the present invention, when the first valve, the fifth valve, and the fourth valve are opened simultaneously, the first adsorption tower produces oxygen and the second adsorption tower desorbs; when the third valve, the second valve, and the sixth valve are opened simultaneously, the second adsorption tower produces oxygen and the second adsorption tower desorbs.

[0021] In actual production, the operation of alternating oxygen production between the first adsorption tower and the second adsorption tower can be controlled by time, so as to achieve the purpose of continuous oxygen production.

[0022] When the pressures in the first adsorption tower and the second adsorption tower reach 0.1 - 0.6 MPa, it indicates that the desorption work process is completed. The value of 0.1 - 0.6 MPa varies depending on the different molecular sieves selected.

[0023] The innovation of the present invention is that neither the finished gas is used for backwashing and cleaning, nor a vacuum device is added for negative pressure desorption; instead, the turbine and impeller device are combined with the oxygen production device. The airflow of the compressed air drives the turbine in the turbine and impeller device to move, thereby driving the impeller to move, forming a negative pressure state in the adsorption tower being desorbed and completing the desorption process.

[0024] Advantages of the present invention:

[0025] The present invention changes the "backwashing and cleaning" process in the existing oxygen production process, and uses the kinetic energy of the airflow in the intake pipeline during "pressure swing adsorption" to push the exhaust pipeline of "pressure swing desorption" to form a negative pressure to complete desorption. In this way, during the oxygen production process, without increasing energy consumption, the oxygen production is doubled and the oxygen production efficiency is improved. Description of the drawings

[0026] Figure 1 It is a schematic diagram of a device for improving oxygen production efficiency of the present invention;

[0027] Wherein: 1 is a silencer; 2 is an air compressor; 3 is a turbine and impeller device; 4 is a first valve; 5 is a second valve; 6 is a third valve; 7 is a fourth valve; 8 is a first adsorption tower; 9 is a second adsorption tower; 10 is a fifth valve; 11 is a sixth valve; 12 is a check valve; 13 is an oxygen tank; 14 is a first air duct; 15 is a second air duct; 16 is a third air duct; 17 is a fourth air duct. Detailed implementation mode

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific implementation modes. It should be understood that the specific implementation modes described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] As Figure 1 shown, a device for improving oxygen production efficiency includes an air compressor 2, a turbine and impeller device 3, an oxygen production device, a check valve 12, and an oxygen tank 13 that are connected in sequence;

[0030] The turbine and impeller device 3 is composed of two independent sealed shells. A turbine and an impeller are respectively arranged in the two sealed shells. The turbine and the impeller are coaxially connected. The two sealed shells are respectively provided with independent air inlets and air outlets, namely a turbine end air inlet, a turbine end air outlet, an impeller end air inlet, and an impeller end air outlet;

[0031] The oxygen production device includes a first valve 4, a second valve 5, a third valve 6, a fourth valve 7, a fifth valve 10, a sixth valve 11, a first adsorption tower 8, and a second adsorption tower 9; the first adsorption tower 8 is provided with a first air duct 14 and a second air duct 15. A fifth valve 10 is arranged on the first air duct 14. One end of the second air duct 15 is provided with two branch air ducts, and a first valve 4 and a third valve 6 are respectively arranged on the two branch air ducts. The first valve 4 and the third valve 6 are in parallel; the second adsorption tower 9 is provided with a third air duct 16 and a fourth air duct 17. A sixth valve 11 is arranged on the third air duct 16. One end of the fourth air duct 17 is provided with two branch air ducts, and a second valve 5 and a fourth valve 7 are respectively arranged on the two branch air ducts. The second valve 5 and the fourth valve 7 are in parallel;

[0032] The turbine end air inlet is connected to the air compressor 2, and the turbine end air outlet is connected to the first valve 4 and the second valve 5. The first valve 4 and the second valve 5 are in parallel; the impeller end air inlet is connected to the third valve 6 and the fourth valve 7. The third valve 6 and the fourth valve 7 are in parallel.

[0033] Specifically, the device for improving oxygen production efficiency further includes a silencer 1, and the silencer 1 is connected to the impeller end air outlet.

[0034] Specifically, a pressure gauge and a pressure sensor are provided on the first adsorption tower 8, and a molecular sieve for adsorbing nitrogen is provided on the first adsorption tower 8.

[0035] Specifically, a flow meter and a pressure gauge are provided on the oxygen tank 13.

[0036] Specifically, a pressure gauge and a pressure sensor are provided on the second adsorption tower 9, and a molecular sieve for adsorbing nitrogen is provided on the second adsorption tower 9.

[0037] The usage method of a device for improving oxygen production efficiency according to the present invention is as follows:

[0038] ① Turn on the air compressor 2. After the air passes through the air compressor 2, compressed air is formed. The compressed air enters the turbine of the turbine and impeller device 3, and the compressed air pushes the turbine to rotate. The rotation of the turbine drives the impeller to rotate;

[0039] ② The first adsorption tower 8 produces oxygen, and the second adsorption tower 9 desorbs: Open the first valve 4, and the compressed air enters the first adsorption tower 8. The nitrogen in the compressed air is adsorbed by the first adsorption tower 8; Open the fifth valve 10 and the check valve 12, and the oxygen in the compressed air enters the oxygen tank 13; At the same time, open the fourth valve 7, and confirm that the third valve 6, the second valve 5, and the sixth valve 11 are in the closed state;

[0040] ③ The second adsorption tower 9 produces oxygen, and the first adsorption tower 8 desorbs: When the pressure in the second adsorption tower 9 reaches 0.1 - 0.6 MPa, close the first valve 4 and the fifth valve 10, stop the oxygen production of the first adsorption tower 8, and close the fourth valve 7; At the same time, open the second valve 5 and the sixth valve 11, the second adsorption tower 9 starts to produce oxygen, and open the third valve 6, and the first adsorption tower 8 starts to desorb; The above 0.1 - 0.6 MPa is the pressure cut-off point for closing and opening the valves. The value of 0.1 - 0.6 MPa is different according to the different molecular sieves selected. For example, if the molecular sieve used is a lithium molecular sieve with a diameter of 0.4 mm, the pressure cut-off point for closing and opening the valves is 0.1 MPa. If the molecular sieve used is a sodium molecular sieve with a diameter of 2.5 mm, the pressure cut-off point for closing and opening the valves is 0.6 MPa;

[0041] ④ When the pressure in the first adsorption tower 8 reaches 0.1 - 0.6 MPa, repeat the operation in step ②, and then perform the operation in step ③. The operations in step ② and step ③ are cycled alternately until the oxygen production work is completed.

[0042] In the present invention, when the first valve 4, the fifth valve 10, and the fourth valve 7 are opened simultaneously, the first adsorption tower 8 produces oxygen, and the second adsorption tower 9 desorbs; When the third valve 6, the second valve 5, and the sixth valve 11 are opened simultaneously, the second adsorption tower 9 produces oxygen, and the second adsorption tower 9 desorbs.

[0043] The present invention changes the "backwashing and cleaning" process in the oxygen production process of the prior art, and uses the kinetic energy of the air flow in the intake pipeline during "pressure boosting adsorption" to drive the exhaust pipeline of "pressure reducing desorption" to form negative pressure to complete desorption. In this way, during the oxygen production process, without increasing energy consumption, the oxygen production is doubled, thereby improving the oxygen production efficiency.

[0044] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the usage requirements, it is within the protection scope of the present invention.

Claims

1. An apparatus for improving oxygen production efficiency, characterized in that: It includes an air compressor, a turbine and impeller device, an oxygen generation device, a check valve, and an oxygen tank that are connected in sequence; The turbine and impeller device consists of two independent sealed housings. A turbine and an impeller are respectively arranged in the two sealed housings. The turbine and the impeller are coaxially connected. The two sealed housings are respectively provided with independent air inlets and air outlets, namely a turbine-end air inlet, a turbine-end air outlet, an impeller-end air inlet, and an impeller-end air outlet; The oxygen generation device includes a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a first adsorption tower, and a second adsorption tower. The first adsorption tower is provided with a first air passage and a second air passage. A fifth valve is arranged on the first air passage. One end of the second air passage is provided with two branch air passages, and a first valve and a third valve are respectively arranged on the two branch air passages. The first valve and the third valve are in parallel connection. The second adsorption tower is provided with a third air passage and a fourth air passage. A sixth valve is arranged on the third air passage. One end of the fourth air passage is provided with two branch air passages, and a second valve and a fourth valve are respectively arranged on the two branch air passages. The second valve and the fourth valve are in parallel connection; The turbine-end air inlet is communicated with the air compressor, and the turbine-end air outlet is communicated with the first valve and the second valve. The first valve and the second valve are in parallel connection; The impeller-end air inlet is communicated with the third valve and the fourth valve. The third valve and the fourth valve are in parallel connection.

2. The device for improving oxygen generation efficiency according to claim 1, wherein: The device for improving oxygen generation efficiency further includes a muffler, and the muffler is communicated with the impeller-end air outlet.

3. The device for improving oxygen production efficiency according to claim 1, characterized in that: The first adsorption tower is provided with a pressure gauge and a pressure sensor.

4. A device for improving oxygen production efficiency according to claim 1, characterized in that: The first adsorption tower is provided with a molecular sieve for adsorbing nitrogen.

5. The device for improving oxygen generation efficiency according to claim 1, wherein: The oxygen tank is provided with a flow meter and a pressure gauge.

6. The device for improving oxygen production efficiency according to claim 1, characterized in that: The second adsorption tower is provided with a pressure gauge and a pressure sensor.

7. The device for improving oxygen production efficiency according to claim 1, characterized in that: The second adsorption tower is provided with a molecular sieve for adsorbing nitrogen.

8. A method for using the device for improving oxygen production efficiency according to claim 1, characterized in that: The specific steps are as follows: ① Turn on the air compressor. The compressed air pushes the turbine to rotate, and the rotation of the turbine drives the impeller to rotate; ② The first adsorption tower generates oxygen, and the second adsorption tower desorbs: Open the first valve and the fifth valve, and open the check valve; At the same time, open the fourth valve, and confirm that the third valve, the second valve, and the sixth valve are in the closed state; ③ The second adsorption tower generates oxygen, and the first adsorption tower desorbs: When the pressure in the second adsorption tower reaches 0.1 - 0.6 MPa, close the first valve and the fifth valve, and close the fourth valve; At the same time, open the second valve, the sixth valve, and the third valve; ④ When the pressure in the first adsorption tower reaches 0.1 - 0.6 MPa, repeat the operation in step ②; Then perform the operation in step ③; The operations in step ② and step ③ are cycled alternately until the oxygen generation work is completed.

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