Oxygen purification plant

Abstract

The utility model relates to gas preparation technical field, concretely is a kind of oxygen purification equipment, including primary filter, refrigerator, secondary filter, compressor, air buffer tower, adsorption tower one, adsorption tower two, pressure equalizing tower and oxygen buffer tower, compressor is communicated with air buffer tower through intake pipeline no.

Description

Technical Field

[0001] This utility model relates to the field of gas preparation technology, specifically to an oxygen purification device. Background Technology

[0002] Pressure Swing Adsorption (PSA) oxygen generation technology is an air separation technique that primarily relies on the different adsorption capacities of oxygen-generating molecular sieves for various gas components in the air under different pressures to achieve the separation of these components. PSA oxygen generation equipment is widely used in industries such as chemical, electronics, medical, metallurgy, and environmental remediation. However, since the oxygen content in the air is only 20%, conventional PSA technology for separating air to produce oxygen results in low purity oxygen. Substandard oxygen is directly discharged, leading to waste, and the oxygen recovery rate is also relatively low, limiting the development of PSA oxygen generation technology. Utility Model Content

[0003] The purpose of this invention is to provide an oxygen purification device that can effectively improve oxygen purity and oxygen recovery rate, thereby overcoming the problems existing in the current equipment.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an oxygen purification device, comprising a primary filter, a refrigeration unit, a secondary filter, a compressor, an air buffer tower, an adsorption tower I, an adsorption tower II, a pressure equalization tower, and an oxygen buffer tower connected by pipelines. The adsorption tower I, adsorption tower II, and pressure equalization tower are arranged in parallel. The primary filter, refrigeration unit, secondary filter, and compressor are connected to the air buffer tower via an inlet pipeline I. The air buffer tower is connected to the inlets of adsorption tower I, adsorption tower II, and pressure equalization tower via an inlet pipeline II. The outlets of adsorption tower I, adsorption tower II, and pressure equalization tower are connected to the oxygen buffer tower via an outlet pipeline I. The oxygen buffer tower is connected to the inlets of adsorption tower I and adsorption tower II sequentially via an outlet pipeline II, a return pipeline, and a rotary valve.

[0005] Based on the above technical solution, the present invention can be further improved as follows: As a further improvement to the above technical solution, the oxygen buffer tower is provided with a sampling port, which is connected to an oxygen concentration detector for detecting oxygen concentration.

[0006] As a further improvement to the above technical solution, the air inlet of the first adsorption tower is also connected to a reflux branch one, and the air inlet of the second adsorption tower is also connected to a reflux branch two. The reflux branch one and the reflux branch two are connected to a reflux pipeline, and a rotary valve is connected at the junction of the reflux branch one and the reflux branch two with the reflux pipeline.

[0007] As a further improvement to the above technical solution, the second inlet pipe is connected to the inlet of the first adsorption tower via the first inlet branch, and the outlet of the first adsorption tower is connected to the first outlet pipe via the first outlet branch; the second inlet pipe is connected to the inlet of the second adsorption tower via the second inlet branch, and the outlet of the second adsorption tower is connected to the first outlet pipe via the second outlet branch; both the first outlet branch and the second outlet branch are connected to an exhaust pipe, which is used to exhaust the regeneration waste gas in the first and second adsorption towers.

[0008] As a further improvement to the above technical solution, the first outlet branch is connected to the second outlet branch via a pressure equalization pipeline, and the first outlet branch is connected to the second inlet branch via the pressure equalization tower.

[0009] As a further improvement to the above technical solution, a dust filter and a bacteria filter are provided on the second air outlet pipe.

[0010] As a further improvement to the above technical solution, the air inlet of the first air inlet pipe is connected in sequence to the compressor, the secondary filter, the refrigeration unit and the primary filter, the air inlet of the primary filter is connected to the raw material gas, and the first adsorption tower and the second adsorption tower are filled with zeolite molecular sieves.

[0011] As a further improvement to the above technical solution, each pipeline is equipped with a valve for controlling the on / off state. The valve includes one or more of the following: pneumatic angle valve, solenoid valve, ball valve, check valve, and butterfly valve. The oxygen purification equipment also includes a PLC controller, which controls and connects to the valves and rotary valves.

[0012] The beneficial effects of this utility model are: This utility model utilizes the pressure difference between the oxygen buffer tower and adsorption tower one and adsorption tower two, and uses a rotary valve to reflux the unqualified oxygen in the oxygen buffer tower back to adsorption tower one and adsorption tower two, thereby achieving secondary purification of unqualified oxygen, effectively improving oxygen purity, and also improving the oxygen recovery efficiency of the entire equipment. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of the oxygen purification equipment provided in a preferred embodiment of the present invention; In the diagram: 11. Primary filter; 12. Refrigeration unit; 13. Secondary filter; 14. Compressor; 2. Air buffer tower; 31. Adsorption tower one; 32. Adsorption tower two; 33. Pressure equalization tower; 4. Oxygen buffer tower; 5. Rotary valve; 61. Dust filter; 62. Bacterial filter; 8. Oxygen concentration detector; 701. Inlet pipe one; 702. Inlet pipe two; 703. Outlet pipe one; 704. Outlet pipe two; 705. Return pipe; 706. Return branch one; 707. Return branch two; 708. Inlet branch one; 709. Inlet branch two; 710. Outlet branch one; 711. Outlet branch two; 712. Pressure equalization pipe; 713. Exhaust pipe. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0016] 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.

[0017] 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.

[0018] like Figure 1As shown, a preferred embodiment of this utility model provides an oxygen purification device, including a primary filter 11, a refrigerator 12, a secondary filter 13, a compressor 14, an air buffer tower 2, an adsorption tower 31, an adsorption tower 32, a pressure equalization tower 33, and an oxygen buffer tower 4 connected by pipelines. The adsorption tower 31, adsorption tower 32, and pressure equalization tower 33 are arranged in parallel. The primary filter 11, refrigerator 12, secondary filter 13, and compressor 14 are connected to the air buffer tower 2 via an inlet pipeline 701. The air buffer tower 2 is connected to the inlets of the adsorption tower 31, adsorption tower 32, and pressure equalization tower 33 via an inlet pipeline 702. The outlets of the adsorption tower 31, adsorption tower 32, and pressure equalization tower 33 are connected to the oxygen buffer tower 4 via an outlet pipeline 703. The oxygen buffer tower 4 is connected to the inlets of the adsorption tower 31 and adsorption tower 32 via an outlet pipeline 704, a return pipeline 705, and a rotary valve 5.

[0019] In this embodiment, the air inlet of the air inlet pipe 701 is connected in sequence to the compressor 14, the secondary filter 13, the refrigeration unit 12 and the primary filter 11, and the air inlet of the primary filter 11 is connected to the raw material gas.

[0020] In this embodiment, the air inlet of the adsorption tower 31 is also connected to a reflux branch 706, and the air inlet of the adsorption tower 32 is also connected to a reflux branch 707. The reflux branch 706 and the reflux branch 707 are connected to a reflux pipe 705, and a rotary valve 5 is connected at the junction of the reflux branch 706 and the reflux branch 707 with the reflux pipe 705.

[0021] In this embodiment, adsorption tower 31 and adsorption tower 32 are filled with zeolite molecular sieves. The second inlet pipe 702 is connected to the inlet of adsorption tower 31 via the first inlet branch 708, and the outlet of adsorption tower 31 is connected to the first outlet pipe 703 via the first outlet branch 710. The second inlet pipe 702 is connected to the inlet of adsorption tower 32 via the second inlet branch 709, and the outlet of adsorption tower 32 is connected to the first outlet pipe 703 via the second outlet branch 711. Both the first outlet branch 710 and the second outlet branch 711 are connected to the vent pipe 713, which is used to vent the regeneration waste gas in adsorption tower 31 and adsorption tower 32.

[0022] In this embodiment, the first outlet branch 710 is connected to the second outlet branch 711 via the equalization pipeline 712, and the first outlet branch 710 is connected to the second inlet branch 709 via the equalization tower 33.

[0023] In this embodiment, the oxygen buffer tower 4 is equipped with a sampling port connected to an oxygen concentration detector 8 for detecting oxygen concentration. When the detected oxygen concentration is unqualified, the valve at the outlet of the second outlet pipe 704 is closed, and the oxygen in the oxygen buffer tower 4 is transported to the first adsorption tower 31 and the second adsorption tower 32 for secondary purification through the rotary valve 5, thereby rapidly increasing the oxygen concentration. Preferably, the second outlet pipe 704 is equipped with a dust filter 61 and a bacteria filter 62.

[0024] Specifically, each pipeline is equipped with a valve for controlling the on / off state. The valve includes one or more of the following: pneumatic angle valve, solenoid valve, ball valve, check valve, and butterfly valve. The oxygen purification equipment also includes a PLC controller, which controls and connects to the valves and rotary valve 5.

[0025] The working process of the above-mentioned oxygen purification equipment is as follows: After being purified, cooled and compressed by the primary filter 11, the refrigeration unit 12, the secondary filter 13 and the compressor 14, the raw gas enters the air buffer tower 2 through the inlet pipe 1 701. The air output from the air buffer tower 2 enters the adsorption tower 1 31 and the adsorption tower 2 32 through the inlet pipe 2 702 respectively. The oxygen produced by the adsorption tower 1 31 and the adsorption tower 2 32 enters the oxygen buffer tower 4 through the outlet branch pipe 1 710, the outlet branch pipe 2 711 and the outlet pipe 1 703 respectively. When the oxygen concentration in the oxygen buffer tower 4 reaches the required level (qualified), it is then output through the dust filter 61, the bacterial filter 62, and the second outlet pipe 704. After the molecular sieve adsorbs nitrogen to near saturation, the supply of raw material gas is stopped and the pressure of the adsorption tower 31 and the second adsorption tower 32 is reduced. The nitrogen adsorbed by the molecular sieve in the adsorption tower 31 and the second adsorption tower 32 is desorbed, the molecular sieve is regenerated and reused. The adsorption tower 31 and the second adsorption tower 32 work alternately to continuously produce oxygen. After being emptied, the pressure in adsorption towers 31 and 32 is only atmospheric pressure. When the oxygen in oxygen buffer tower 4 fails the purity test, the valve on outlet pipe 704 is closed, increasing the pressure inside oxygen buffer tower 4. Then, rotary valve 5 connects oxygen buffer tower 4 with adsorption towers 31 and 32 by rotation. Utilizing the pressure difference between oxygen buffer tower 4 and adsorption towers 31 and 32, the oxygen in oxygen buffer tower 4 that fails the purity test is transported to adsorption towers 31 and 32 via outlet pipe 704 and return pipe 705 for secondary purification, thus achieving secondary purification of the substandard oxygen.

[0026] This invention utilizes the pressure difference between the oxygen buffer tower 4 and the adsorption towers 31 and 32 to reflux substandard oxygen from the oxygen buffer tower 4 to the adsorption towers 31 and 32 via a rotary valve 5. This achieves secondary purification of the substandard oxygen, effectively improving oxygen purity and the overall oxygen recovery efficiency of the equipment.

[0027] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0028] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An oxygen purification device, characterized in that: The system includes a primary filter, a refrigeration unit, a secondary filter, a compressor, an air buffer tower, an adsorption tower 1, an adsorption tower 2, a pressure equalization tower, and an oxygen buffer tower, all connected by pipelines. The adsorption tower 1, adsorption tower 2, and pressure equalization tower are arranged in parallel. The primary filter, refrigeration unit, secondary filter, and compressor are connected to the air buffer tower via inlet pipeline 1. The air buffer tower is connected to the inlets of adsorption tower 1, adsorption tower 2, and pressure equalization tower via inlet pipeline 2. The outlets of adsorption tower 1, adsorption tower 2, and pressure equalization tower are connected to the oxygen buffer tower via outlet pipeline 1. The oxygen buffer tower is connected to the inlets of adsorption tower 1 and adsorption tower 2 in sequence via outlet pipeline 2, a return pipeline, and a rotary valve.

2. The oxygen purification equipment according to claim 1, characterized in that: The oxygen buffer tower is equipped with a sampling port, which is connected to an oxygen concentration detector for detecting oxygen concentration.

3. The oxygen purification equipment according to claim 1, characterized in that: The air inlet of adsorption tower one is also connected to reflux branch one, and the air inlet of adsorption tower two is also connected to reflux branch two. Reflux branch one and reflux branch two are connected to reflux pipeline, and a rotary valve is connected at the junction of reflux branch one and reflux branch two with reflux pipeline.

4. The oxygen purification equipment according to claim 3, characterized in that: The second inlet pipe is connected to the inlet of the first adsorption tower via the first inlet branch pipe, and the outlet of the first adsorption tower is connected to the first outlet pipe via the first outlet branch pipe; the second inlet pipe is connected to the inlet of the second adsorption tower via the second inlet branch pipe, and the outlet of the second adsorption tower is connected to the first outlet pipe via the second outlet branch pipe; both the first outlet branch pipe and the second outlet branch pipe are connected to an exhaust pipe, which is used to exhaust the regeneration waste gas in the first and second adsorption towers.

5. The oxygen purification equipment according to claim 4, characterized in that: The first outlet branch is connected to the second outlet branch via the equalization pipeline, and the first outlet branch is connected to the second inlet branch via the equalization tower.

6. The oxygen purification equipment according to claim 5, characterized in that: The second air outlet pipe is equipped with a dust filter and a bacteria filter.

7. The oxygen purification equipment according to claim 6, characterized in that: The air inlet of the first air inlet pipe is connected in sequence to the compressor, the secondary filter, the refrigeration unit and the primary filter. The air inlet of the primary filter is connected to the raw material gas. The first adsorption tower and the second adsorption tower are filled with zeolite molecular sieves.

8. The oxygen purification equipment according to claim 7, characterized in that: Each pipeline is equipped with a valve for controlling the on / off state. The valve includes one or more of the following: pneumatic angle valve, solenoid valve, ball valve, check valve, and butterfly valve. The oxygen purification equipment also includes a PLC controller, which controls and connects to the valves and rotary valves.

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