An oxygen generation system with substandard oxygen recovery function

Abstract

This invention provides an oxygen production system with a function for recovering substandard oxygen, comprising: an air compressor, the air outlet of which is connected to an outlet pipe; two adsorption towers, the air inlets of which are connected to the outlet pipe; two intermediate oxygen storage tanks, the air inlets of which are connected to the outlets of the adsorption towers, and the outlets of which are connected to the outlet pipe; and an oxygen storage tank, the air inlet of which is connected to the outlets of the two intermediate oxygen storage tanks. The beneficial effects of this invention are: by setting up two intermediate oxygen storage tanks, the system can detect whether the oxygen content produced by each adsorption tower is up to standard, and select whether to perform a secondary adsorption operation based on whether it is up to standard, thereby reducing the energy consumption of the equipment and ensuring the stability of the oxygen content.

Description

Technical Field

[0001] This utility model belongs to the field of oxygen generators, and in particular relates to an oxygen generation system with a function of recovering substandard oxygen. Background Technology

[0002] Pressure swing adsorption (PSA) is a relatively economical method for obtaining high-purity oxygen in small-to-medium-scale air separation oxygen production, mainly used in medical treatment and home oxygen therapy. PSA systems have strict requirements for the purity of oxygen in the product gas, generally requiring an oxygen purity of not less than 90%. Currently, when oxygen production systems detect that the purity of the produced oxygen is less than 90%, most of them discharge it through the silencer of the nitrogen exhaust port. Re-producing oxygen would result in energy waste or failure to produce qualified oxygen. Summary of the Invention

[0003] In view of this, the present invention aims to provide an oxygen generation system with a function of recovering substandard oxygen, in order to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An oxygen generation system with a function to recover substandard oxygen includes:

[0006] An air compressor, wherein the air outlet of the air compressor is connected to an air outlet pipe;

[0007] The adsorption towers are of two types, and the inlets and outlets of the two adsorption towers are connected.

[0008] Two intermediate oxygen storage tanks are provided, with their inlets connected to the outlets of the adsorption tower and their outlets connected to an outlet pipe.

[0009] An oxygen storage tank, wherein the inlet of the oxygen storage tank is connected to the outlet of two intermediate oxygen storage tanks.

[0010] Furthermore, the outlet pipe is equipped with an outlet solenoid valve, and the two adsorption towers are respectively a first adsorption tower and a second adsorption tower. The inlet of the first adsorption tower is connected to the pipe connecting the outlet pipe with a first inlet solenoid valve, and the inlet of the second adsorption tower is connected to the pipe connecting the outlet pipe with a second inlet solenoid valve.

[0011] The first adsorption tower is connected to each oxygen intermediate storage tank through a connecting pipe. A first one-way valve is connected to the pipe connecting the first adsorption tower and the connecting pipe. A second one-way valve is connected to the pipe connecting the second adsorption tower and the connecting pipe.

[0012] Furthermore, the two oxygen intermediate storage tanks are a first oxygen intermediate storage tank and a second oxygen intermediate storage tank. The inlet of the first oxygen intermediate storage tank is connected to a first oxygen solenoid valve on the pipeline connecting the connecting pipe, and the inlet of the second oxygen intermediate storage tank is connected to a second oxygen solenoid valve on the pipeline connecting the connecting pipe.

[0013] Furthermore, the oxygen storage tank’s inlet is connected to the oxygen outlet pipe, the oxygen outlet pipe is connected to the outlet of the first intermediate oxygen storage tank and a third oxygen solenoid valve is connected to the pipeline, and the oxygen outlet pipe is connected to the second intermediate oxygen storage tank and a fourth oxygen solenoid valve is connected to the pipeline.

[0014] A main oxygen solenoid valve is connected to the pipeline connecting the outlet of the oxygen storage tank and the inlet of the vacuum pump.

[0015] Furthermore, the air inlet of the first adsorption tower is connected to the air inlet of the second adsorption tower through a first balance pipe;

[0016] A first balancing solenoid valve is connected to the first balancing pipe;

[0017] The outlet of the first adsorption tower is connected to the outlet of the second adsorption tower through a second balance pipe;

[0018] The second balancing pipe is connected to the second balancing solenoid valve and the third balancing solenoid valve.

[0019] Furthermore, the oxygen generation system also includes a silencer connected to the second balance pipe. The silencer is located between the second balance solenoid valve and the third balance solenoid valve at the connection point between the silencer and the second balance pipe. A silencer solenoid valve is connected to the pipeline connecting the silencer and the second balance pipe.

[0020] Furthermore, the air inlet of the first intermediate oxygen storage tank and the air inlet of the second intermediate oxygen storage tank are respectively connected to the recovery pipe. A first oxygen recovery solenoid valve is connected to the pipe connecting the air inlet of the first intermediate oxygen storage tank and the recovery pipe, and a second oxygen recovery solenoid valve is connected to the pipe connecting the air inlet of the second intermediate oxygen storage tank and the recovery pipe.

[0021] The recovery pipe is equipped with a main recovery solenoid valve. The exhaust pipe is connected to two intake pipes via a tee. The two intake pipes are respectively connected to a first intake solenoid valve and a second intake solenoid valve. The recovery pipe is connected to the exhaust pipe, and the connection point between the recovery pipe and the exhaust pipe is located between the exhaust solenoid valve and the tee.

[0022] Furthermore, each of the aforementioned intermediate oxygen storage tanks is equipped with an oxygen content detection component.

[0023] Furthermore, the air outlet of the air compressor is connected to the air inlet of the dehumidifier through a filter, and the air outlet of the dehumidifier is connected to the air outlet pipe.

[0024] Furthermore, the air outlet of the dehumidifier is connected to the air inlet of the pressure stabilizing tank, and the air outlet of the pressure stabilizing tank is connected to the air outlet pipe.

[0025] Compared with existing technologies, the oxygen generation system with substandard oxygen recovery function described in this utility model has the following beneficial effects:

[0026] The present invention discloses an oxygen production system with a function for recovering substandard oxygen. By setting up two intermediate oxygen storage tanks, it detects whether the oxygen content produced by each adsorption tower is up to standard, and selects whether to perform a secondary adsorption operation based on whether it is up to standard. This reduces the energy consumption of the equipment and ensures the stability of the oxygen content. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a schematic diagram of the oxygen generation system described in an embodiment of the present invention;

[0029] Figure 2 As described in the embodiments of this utility model Figure 1 Schematic diagram of the structure at point A in the middle.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Air compressor; 2. Filter; 3. Dehumidifier; 4. Pressure stabilizing tank; 5. First adsorption tower; 6. Second adsorption tower; 7. First intermediate oxygen storage tank; 8. Second intermediate oxygen storage tank; 9. Oxygen storage tank; 10. Vacuum pump; 11. Silencer; 12. Outlet pipe; 13. First balance pipe; 14. Inlet pipe; 15. Second balance pipe; 16. Connecting pipe; 17. Recovery pipe; 18. Oxygen outlet pipe; 401. Outlet solenoid valve; 501. Second balance solenoid valve; 6 01. Third balancing solenoid valve; 502. First intake solenoid valve; 602. Second intake solenoid valve; 503. First balancing solenoid valve; 504. First check valve; 603. Second check valve; 701. First oxygen solenoid valve; 801. Second oxygen solenoid valve; 702. First oxygen recovery solenoid valve; 802. Second oxygen recovery solenoid valve; 703. Third oxygen solenoid valve; 803. Fourth oxygen solenoid valve; 901. Main oxygen solenoid valve; 1101. Silencer solenoid valve. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] like Figures 1 to 2 As shown, an oxygen generation system with a function of recovering substandard oxygen includes: an air compressor 1, the outlet of which is connected to an outlet pipe 12; two adsorption towers, the inlets of which are connected to the outlet pipe 12; two intermediate oxygen storage tanks, the inlets of which are connected to the outlets of the adsorption towers, and the outlets of which are connected to the outlet pipe 12; and an oxygen storage tank 9, the inlet of which is connected to the outlets of the two intermediate oxygen storage tanks.

[0037] The inside of oxygen storage tank 9 can be under negative pressure to facilitate rapid oxygen flow within the intermediate oxygen storage tank.

[0038] An outlet solenoid valve 401 is provided on the outlet pipe 12. The two adsorption towers are a first adsorption tower 5 and a second adsorption tower 6, respectively. A first inlet solenoid valve 502 is connected to the pipe connecting the inlet of the first adsorption tower 5 to the outlet pipe 12. A second inlet solenoid valve 602 is connected to the pipe connecting the inlet of the second adsorption tower 6 to the outlet pipe 12. The first adsorption tower 5 is connected to each oxygen intermediate storage tank through a connecting pipe 16. A first one-way valve 504 is connected to the pipe connecting the first adsorption tower 5 to the connecting pipe 16. A second one-way valve 603 is connected to the pipe connecting the second adsorption tower 6 to the connecting pipe 16. The connecting pipe 16 is connected to the inlet of the two oxygen intermediate storage tanks.

[0039] The two intermediate oxygen storage tanks are a first intermediate oxygen storage tank 7 and a second intermediate oxygen storage tank 8. The inlet of the first intermediate oxygen storage tank 7 is connected to the pipeline connecting the connecting pipe 16, and the inlet of the second intermediate oxygen storage tank 8 is connected to the pipeline connecting the connecting pipe 16, and the second intermediate oxygen storage tank 8 is connected to the pipeline connecting the connecting pipe 16, and the second intermediate oxygen storage tank 8 is connected to the pipeline connecting the connecting pipe 16.

[0040] The oxygen storage tank 9 has an inlet connected to an outlet pipe 18. The outlet pipe 18 is connected to the outlet of the first intermediate oxygen storage tank 7 via a third oxygen solenoid valve 703. The outlet pipe 18 is connected to the second intermediate oxygen storage tank 8 via a fourth oxygen solenoid valve 803.

[0041] A main oxygen solenoid valve 901 is connected to the pipeline connecting the outlet of the oxygen storage tank 9 and the inlet of the vacuum pump 10.

[0042] The inlet of the first adsorption tower 5 is connected to the inlet of the second adsorption tower 6 through the first balance pipe 13; the first balance pipe 13 is connected to the first balance solenoid valve 503; the outlet of the first adsorption tower 5 is connected to the outlet of the second adsorption tower 6 through the second balance pipe 15; the second balance pipe 15 is connected to the second balance solenoid valve 501 and the third balance solenoid valve 601.

[0043] The oxygen generation system also includes a silencer 11 connected to the second balance pipe 15. The silencer 11 is located between the second balance solenoid valve 501 and the third balance solenoid valve 601 at the connection point between the silencer 11 and the second balance pipe 15. A silencer solenoid valve 1101 is connected to the pipeline connecting the silencer 11 and the second balance pipe 15.

[0044] The air inlet of the first intermediate oxygen storage tank 7 and the air inlet of the second intermediate oxygen storage tank 8 are respectively connected to the recovery pipe 17. A first oxygen recovery solenoid valve 702 is connected to the pipe connecting the air inlet of the first intermediate oxygen storage tank 7 and the recovery pipe 17. A second oxygen recovery solenoid valve 802 is connected to the pipe connecting the air inlet of the second intermediate oxygen storage tank 8 and the recovery pipe 17.

[0045] The recovery pipe 17 is equipped with a recovery master solenoid valve 1701. The exhaust pipe 12 is connected to two intake pipes 14 via a tee. The two intake pipes 14 are respectively connected to a first intake solenoid valve 502 and a second intake solenoid valve 602. The recovery pipe 17 is connected to the exhaust pipe 12. The connection between the recovery pipe 17 and the exhaust pipe 12 is located between the exhaust solenoid valve 401 and the tee.

[0046] Each intermediate oxygen storage tank is equipped with an oxygen content detection component. The fixed online multi-functional oxygen detector from Jishunan Technology is model JK50-O2.

[0047] The air outlet of the air compressor 1 is connected to the air inlet of the dehumidifier 3 through the filter 2. The air outlet of the dehumidifier 3 is connected to the air outlet pipe 12. The filter 2 can filter dust in the compressed air. The filter 2 adopts, but is not limited to, the existing Huakai HK-GL series high-pressure gas separation filter 2. The dehumidifier 3 adopts, but is not limited to, the existing condenser dehumidifier. The dehumidifier can adsorb moisture in the high-pressure air.

[0048] The air outlet of dehumidifier 3 is connected to the air inlet of pressure stabilizing tank 4, and the air outlet of pressure stabilizing tank 4 is connected to air outlet pipe 12. Pressure stabilizing tank 4 plays a role in stabilizing the pressure, making the air pressure entering the adsorption tower stable.

[0049] Work process:

[0050] When this scheme is implemented, the air compressor 1 and dehumidifier 3 are started. The air compressor 1 compresses the air in the atmosphere into high-pressure air and delivers it to the pressure stabilizing tank 4. The outlet solenoid valve 401 and the first inlet solenoid valve 502 are opened, and the high-pressure air enters the first adsorption tower 5. The zeolite in the first adsorption tower 5 adsorbs the nitrogen in the high-pressure air. Then the outlet solenoid valve 401 and the first inlet solenoid valve 502 are closed. After the air pressure reaches the specified pressure, the first one-way valve 504 is opened, and the first oxygen solenoid valve 701 is opened. Oxygen enters the first oxygen intermediate storage tank 7 through the connecting pipe 16 and the first oxygen solenoid valve 701. The oxygen content detection component detects the oxygen content in the first oxygen intermediate storage tank 7. If the oxygen content in the first oxygen intermediate storage tank 7 is qualified, the third oxygen solenoid valve 703 is opened, and the oxygen enters the oxygen storage tank 9 for storage.

[0051] Open the first balancing solenoid valve 503, the second balancing solenoid valve 501, and the third balancing solenoid valve 601 to balance the pressure of the two adsorption towers. Then close the first balancing solenoid valve 503 and the third balancing solenoid valve 601, and open the silencer solenoid valve 1101. At this time, the first adsorption tower 5 undergoes depressurization desorption, and nitrogen gas is discharged into the atmosphere through the silencer solenoid valve 1101 and the silencer 11. The depressurization desorption of the second adsorption tower 6 is similar and will not be described in detail here.

[0052] If the oxygen in the first intermediate oxygen storage tank 7 is not up to standard, the first oxygen recovery solenoid valve 702, the second inlet solenoid valve 602, and the recovery main solenoid valve 1701 on the recovery pipe 17 are opened, allowing oxygen to enter the second adsorption tower 6. When the pressure reaches the specified pressure, the second one-way valve 603 opens, and oxygen enters the second intermediate oxygen storage tank 8. During this process, the first adsorption tower 5 depressurizes and desorbs, and the oxygen content in the second intermediate oxygen storage tank 8 is detected. If it is up to standard, the fourth oxygen solenoid valve 803 is opened, and oxygen enters the oxygen storage tank 9 for storage. Otherwise, the oxygen re-enters the first adsorption tower 5 after depressurization and desorption for adsorption.

[0053] By setting up two intermediate oxygen storage tanks, the oxygen content produced by each adsorption tower is tested to determine whether it meets the requirements. Based on whether it meets the requirements, multiple adsorption operations can be performed, which reduces the energy consumption of the equipment and ensures the stability of the oxygen content.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oxygen generation system with a function for recovering substandard oxygen, characterized in that, include: An air compressor (1) is provided, wherein the air outlet of the air compressor (1) is connected to the air outlet pipe (12); The adsorption towers are of two types, and the air inlets of the two adsorption towers are connected to the air outlet pipe (12). Oxygen intermediate storage tank, the number of oxygen intermediate storage tanks is two, the air inlet of the two oxygen intermediate storage tanks is connected to the air outlet of the adsorption tower, and the air outlet of the two oxygen intermediate storage tanks is connected to the air outlet pipe (12). An oxygen storage tank (9) is provided, the inlet of which is connected to the outlet of two intermediate oxygen storage tanks.

2. The oxygen generating system with substandard oxygen recovery function according to claim 1, characterized in that: The outlet pipe (12) is equipped with an outlet solenoid valve (401). The two adsorption towers are a first adsorption tower (5) and a second adsorption tower (6), respectively. The inlet of the first adsorption tower (5) is connected to the pipe of the outlet pipe (12) with a first inlet solenoid valve (502). The inlet of the second adsorption tower (6) is connected to the pipe of the outlet pipe (12) with a second inlet solenoid valve (602). The first adsorption tower (5) is connected to each oxygen intermediate storage tank through a connecting pipe (16). A first one-way valve (504) is connected to the pipe connecting the first adsorption tower (5) and the connecting pipe (16). A second one-way valve (603) is connected to the pipe connecting the second adsorption tower (6) and the connecting pipe (16).

3. The oxygen generating system with off-specification oxygen recovery function according to claim 2, characterized in that: The two oxygen intermediate storage tanks are a first oxygen intermediate storage tank (7) and a second oxygen intermediate storage tank (8). The first oxygen intermediate storage tank (7) is connected to a first oxygen solenoid valve (701) on the pipeline connecting the air inlet to the connecting pipe (16), and the second oxygen solenoid valve (801) is connected to the pipeline connecting the air inlet to the connecting pipe (16).

4. The oxygen generating system with off-specification oxygen recovery function according to claim 3, characterized in that: The oxygen storage tank (9) has an air inlet connected to an oxygen outlet pipe (18), and the oxygen outlet pipe (18) is connected to the air outlet of the first intermediate oxygen storage tank (7) via a third oxygen solenoid valve (703). The oxygen outlet pipe (18) is connected to the air outlet of the second intermediate oxygen storage tank (8) via a fourth oxygen solenoid valve (803). The main oxygen solenoid valve (901) is connected to the pipeline connecting the outlet of the oxygen storage tank (9) and the inlet of the vacuum pump (10).

5. The oxygen generating system with off-specification oxygen recovery function according to claim 3, characterized in that: The air inlet of the first adsorption tower (5) is connected to the air inlet of the second adsorption tower (6) through the first balance pipe (13); The first balancing pipe (13) is connected to a first balancing solenoid valve (503); The outlet of the first adsorption tower (5) is connected to the outlet of the second adsorption tower (6) through the second balance pipe (15); The second balancing pipe (15) is connected to the second balancing solenoid valve (501) and the third balancing solenoid valve (601).

6. The oxygen generating system with off-specification oxygen recovery function according to claim 5, characterized in that: The oxygen generation system also includes a silencer (11) connected to the second balance pipe (15). The silencer (11) is located between the second balance solenoid valve (501) and the third balance solenoid valve (601) at the connection point between the silencer (11) and the second balance pipe (15). A silencer solenoid valve (1101) is connected to the pipeline connecting the silencer (11) and the second balance pipe (15).

7. The oxygen generating system with off-specification oxygen recovery function according to claim 3, characterized in that: The air inlet of the first intermediate oxygen storage tank (7) and the air inlet of the second intermediate oxygen storage tank (8) are respectively connected to the recovery pipe (17). A first oxygen recovery solenoid valve (702) is connected to the pipeline connecting the air inlet of the first intermediate oxygen storage tank (7) and the recovery pipe (17). A second oxygen recovery solenoid valve (802) is connected to the pipeline connecting the air inlet of the second intermediate oxygen storage tank (8) and the recovery pipe (17). The recovery pipe (17) is equipped with a recovery master solenoid valve (1701). The exhaust pipe (12) is connected to two intake pipes (14) through a tee. The two intake pipes (14) are respectively connected to a first intake solenoid valve (502) and a second intake solenoid valve (602). The recovery pipe (17) is connected to the exhaust pipe (12). The connection between the recovery pipe (17) and the exhaust pipe (12) is located between the exhaust solenoid valve (401) and the tee.

8. The oxygen generating system with off-specification oxygen recovery function according to claim 1, characterized in that: Each of the aforementioned intermediate oxygen storage tanks is equipped with an oxygen content detection component.

9. An oxygen generation system with a function for recovering substandard oxygen according to claim 1, characterized in that: The air outlet of the air compressor (1) is connected to the air inlet of the dehumidifier (3) through the filter (2), and the air outlet of the dehumidifier (3) is connected to the air outlet pipe (12).

10. The oxygen generating system with off-specification oxygen recovery function according to claim 9, characterized in that: The outlet of the dehumidifier (3) is connected to the inlet of the pressure stabilizing tank (4), and the outlet of the pressure stabilizing tank (4) is connected to the outlet pipe (12).

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