VPSA (Vacuum Pressure Swing Adsorption) oxygen production device

Abstract

The utility model relates to the technical field of oxygen production, in particular to a VPSA (Vacuum Pressure Swing Adsorption) oxygen production device. Comprising an air inlet assembly, a first air inlet valve, a second air inlet valve, a first vacuum valve, a second vacuum valve, an outlet vacuum pump blower, two adsorption towers, a first air outlet valve, a second air outlet valve, an air outlet buffer tank, a metering assembly, a first pipeline, a second pipeline, a first pressure equalizing valve, a second pressure equalizing valve and a regulating valve, the gas inlet assembly is connected with the two adsorption towers through a first gas inlet valve and a second gas inlet valve respectively; the outlet vacuum pump blower is respectively connected with the two adsorption towers through a first vacuum valve and a second vacuum valve, and the air outlet buffer tank is respectively connected with the two adsorption towers through a corresponding first air outlet valve and a corresponding second air outlet valve; in this way, the technical problems that in the prior art, when a VPSA oxygen generating device adopting a nine-valve technology is used for reducing pressure through a pressure equalizing valve after adsorption / desorption of an adsorption tower is completed, noise is large, airflow impact is high, and hidden danger of equipment is caused by long-term operation are solved.

Description

Technical Field

[0001] This utility model relates to the field of oxygen production technology, and in particular to a VPSA oxygen production device. Background Technology

[0002] Oxygen, as an important industrial and medical gas, is experiencing continuously growing demand across numerous industries. Traditional oxygen production methods, such as cryogenic air separation, while producing high-purity oxygen, suffer from drawbacks such as high equipment investment, high energy consumption, and complex operation, making them unsuitable for scenarios with relatively low oxygen demand and high cost sensitivity. Therefore, vacuum pressure swing adsorption (VPSA) oxygen production technology has emerged.

[0003] However, in the existing technology, the VPSA oxygen generation unit using the 9-valve process has problems such as high noise, strong airflow impact, and potential equipment hazards caused by long-term operation when the pressure is reduced by the pressure equalization valve after the adsorption / desorption of the adsorption tower. Utility Model Content

[0004] The purpose of this utility model is to provide a VPSA oxygen generator, which aims to solve the technical problems of high noise, strong airflow impact, and potential equipment hazards caused by long-term operation when the VPSA oxygen generator using the 9-valve process reduces pressure using the equalizing valve after the adsorption / desorption of the adsorption tower.

[0005] To achieve the above objectives, this utility model employs a VPSA oxygen generation device, comprising an air intake assembly, a first air intake valve, a second air intake valve, a first vacuum valve, a second vacuum valve, an outlet vacuum pump blower, two adsorption towers, a first outlet valve, a second outlet valve, an outlet buffer tank, a metering assembly, a first pipeline, a second pipeline, a first pressure equalizing valve, a second pressure equalizing valve, and a regulating valve. The air intake assembly is connected to the two adsorption towers respectively through the first air intake valve and the second air intake valve.

[0006] The outlet vacuum pump blower is connected to the two adsorption towers through the first vacuum valve and the second vacuum valve, respectively. The outlet buffer tank is connected to the two adsorption towers through the corresponding first outlet valve and the second outlet valve, respectively. The two ends of the first pipeline and the second pipeline are respectively connected to the outlet of the corresponding adsorption tower. The first pressure equalization valve is installed on the first pipeline. The second pressure equalization valve and the regulating valve are both installed on the second pipeline. The metering component is installed on the outlet buffer tank.

[0007] The air intake assembly includes an inlet buffer tank and an air intake vacuum pump blower. The air intake end of the air intake vacuum pump blower is connected to the inlet buffer tank, and the air outlet end of the air intake vacuum pump blower is connected to the first air intake valve and the second air intake valve.

[0008] The metering component includes an AC valve and a flow meter, with the AC valve positioned between the outlet buffer tank and the flow meter.

[0009] The VPSA oxygen generator also includes a vacuum bypass valve and a blower bypass valve. The inlet of the vacuum bypass valve is connected to the inlet buffer tank, and the outlet of the vacuum bypass valve is connected to the first inlet valve and the second inlet valve.

[0010] The blower bypass valves are all connected to the inlet buffer tank and the outlet vacuum pump blower.

[0011] The VPSA oxygen generator also includes an outlet silencer, which is connected to the outlet vacuum pump blower.

[0012] This utility model discloses a VPSA oxygen generator. In practical use, before the adsorption and desorption pressures reach saturation, the regulating valve connected to the second equalizing valve is opened to control the pipeline flow rate and oxygen flow rate (before the second equalizing valve is opened, the regulating valve is already open to the set opening degree, so process valves must be used in series). When the regulating valve is 100% fully open, the molecular sieve adsorption is saturated. Then, the first equalizing valve is opened to flush the adsorption tower, which has just been evacuated, with oxygen-enriched air from the tower. Before the first equalizing valve is opened, the adsorption and desorption pressures are lower than the traditional process pressures. Due to the addition of the second equalizing valve, the pipeline cross-sectional area is increased. When the pressure difference between the two adsorption towers decreases before equalization, the pipeline flow rate and airflow noise are lower than in the traditional process. This method solves the technical problems of existing VPSA oxygen generators using a 9-valve process, which have high noise, strong airflow impact, and potential equipment hazards caused by long-term operation when the pressure is reduced by the equalizing valve after adsorption / desorption in the adsorption tower. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the VPSA oxygen generator of this utility model.

[0015] 1-First inlet valve, 2-Second inlet valve, 3-First vacuum valve, 4-Second vacuum valve, 5-Outlet vacuum pump blower, 6-Adsorption tower, 7-First outlet valve, 8-Second outlet valve, 9-Outlet buffer tank, 10-First pipeline, 11-Second pipeline, 12-First equalizing valve, 13-Second equalizing valve, 14-Regulating valve, 15-Outlet silencer, 16-Inlet buffer tank, 17-Inlet vacuum pump blower, 18-AC valve, 19-Flow meter, 20-Vacuum bypass valve, 21-Blower bypass valve. Detailed Implementation

[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0017] Please see Figure 1 , Figure 1 This is a schematic diagram of the VPSA oxygen generator of this utility model.

[0018] This utility model provides a VPSA oxygen generator, including an air intake assembly, a first air intake valve 1, a second air intake valve 2, a first vacuum valve 3, a second vacuum valve 4, an outlet vacuum pump blower 5, two adsorption towers 6, a first outlet valve 7, a second outlet valve 8, an outlet buffer tank 9, a metering assembly, a first pipeline 10, a second pipeline 11, a first pressure equalizing valve 12, a second pressure equalizing valve 13, and a regulating valve 14. The air intake assembly is connected to the two adsorption towers 6 through the first air intake valve 1 and the second air intake valve 2, respectively.

[0019] The outlet vacuum pump blower 5 is connected to the two adsorption towers 6 through the first vacuum valve 3 and the second vacuum valve 4 respectively. The outlet buffer tank 9 is connected to the two adsorption towers 6 through the corresponding first outlet valve 7 and the second outlet valve 8 respectively. The two ends of the first pipeline 10 and the second pipeline 11 are respectively connected to the outlet of the corresponding adsorption tower 6. The first pressure equalization valve 12 is installed on the first pipeline 10. The second pressure equalization valve 13 and the regulating valve 14 are both installed on the second pipeline 11. The metering component is installed on the outlet buffer tank 9.

[0020] The VPSA oxygen generator also includes an outlet silencer 15, which is connected to the outlet vacuum pump blower 5.

[0021] In this specific embodiment, during actual use, before the adsorption and desorption pressures reach saturation, the regulating valve 14 connected to the second equalizing valve 13 is opened to control the pipeline flow rate and oxygen flow rate (before the second equalizing valve 13 is opened, the regulating valve 14 is already opened to the set opening degree, so process valves must be used in series). When the regulating valve 14 is 100% fully open, the molecular sieve adsorption is saturated. Then, the first equalizing valve 12 is opened to flush the adsorption tower 6, which has just been evacuated, with oxygen-enriched air from the tower. Before the first equalizing valve 12 is opened, the adsorption and desorption pressures are lower than the traditional process pressures. Due to the addition of the second equalizing valve 13, the pipeline cross-sectional area is increased. When the pressure difference between the two adsorption towers 6 decreases before equalization, the pipeline flow rate and airflow noise are lower than in the traditional process. This method solves the technical problems of high noise, strong airflow impact, and potential equipment hazards caused by long-term operation when the VPSA oxygen generator using the 9-valve process in the prior art uses the equalizing valve to reduce pressure after adsorption / desorption in the adsorption tower 6.

[0022] The air intake assembly includes an inlet buffer tank 16 and an air intake vacuum pump blower 17. The air intake end of the air intake vacuum pump blower 17 is connected to the inlet buffer tank 16, and the air outlet end of the air intake vacuum pump blower 17 is connected to the first air intake valve 1 and the second air intake valve 2.

[0023] In this specific embodiment, during actual use, air enters the intake vacuum pump blower 17 through the inlet buffer tank 16, and enters the lower part of the adsorption tower 6 through the first intake valve 1 and the second intake valve 2 under the delivery of the intake vacuum pump blower 17.

[0024] Secondly, the metering component includes an AC valve 18 and a flow meter 19, with the AC valve 18 disposed between the outlet buffer tank 9 and the flow meter 19.

[0025] In this specific embodiment, the flow meter 19 is used to measure the fluid flowing through the AC valve 18.

[0026] Meanwhile, the VPSA oxygen generator also includes a vacuum bypass valve 20 and a blower bypass valve 21. The inlet of the vacuum bypass valve 20 is connected to the inlet buffer tank 16, and the outlet of the vacuum bypass valve 20 is connected to the first inlet valve 1 and the second inlet valve 2.

[0027] The blower bypass valve 21 is connected to the inlet buffer tank 16 and the outlet vacuum pump blower 5.

[0028] In this specific embodiment, the inlet buffer tank 16 can directly allow gas to enter the first inlet valve 1 and the second inlet valve 2 through the vacuum bypass valve 20.

[0029] In the VPSA oxygen generator of this invention, before the adsorption and desorption pressures reach saturation, the regulating valve 14 connected to the second equalizing valve 13 is opened to control the pipeline flow rate and oxygen flow rate (the regulating valve 14 is already opened to a set degree before the second equalizing valve 13 is opened, so process valves must be used in series). When the regulating valve 14 is 100% fully open, the molecular sieve adsorption is saturated. Then, the first equalizing valve 12 is opened to flush the adsorption tower 6, which has just been evacuated, with oxygen-enriched air from the tower. Before the first equalizing valve 12 is opened, the adsorption and desorption pressures are lower than the traditional process pressures. Due to the addition of the second equalizing valve 13, the pipeline cross-sectional area is increased. When the pressure difference between the two adsorption towers 6 decreases before equalization, the pipeline flow rate and airflow noise are lower than in the traditional process. This method solves the technical problems of existing VPSA oxygen generators using a 9-valve process, which have high noise, strong airflow impact, and potential equipment hazards caused by long-term operation when the pressure is reduced by the equalizing valve after adsorption / desorption in the adsorption tower 6.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A VPSA oxygen generator, characterized in that, It includes an air intake assembly, a first air intake valve, a second air intake valve, a first vacuum valve, a second vacuum valve, an outlet vacuum pump blower, two adsorption towers, a first outlet valve, a second outlet valve, an outlet buffer tank, a metering assembly, a first pipeline, a second pipeline, a first pressure equalizing valve, a second pressure equalizing valve, and a regulating valve. The air intake assembly is connected to the two adsorption towers through the first air intake valve and the second air intake valve, respectively. The outlet vacuum pump blower is connected to the two adsorption towers through the first vacuum valve and the second vacuum valve, respectively. The outlet buffer tank is connected to the two adsorption towers through the corresponding first outlet valve and the second outlet valve, respectively. The two ends of the first pipeline and the second pipeline are respectively connected to the outlet of the corresponding adsorption tower. The first pressure equalization valve is installed on the first pipeline. The second pressure equalization valve and the regulating valve are both installed on the second pipeline. The metering component is installed on the outlet buffer tank.

2. The VPSA oxygen generator as described in claim 1, characterized in that, The air intake assembly includes an inlet buffer tank and an air intake vacuum pump blower. The air intake end of the air intake vacuum pump blower is connected to the inlet buffer tank, and the air outlet end of the air intake vacuum pump blower is connected to the first air intake valve and the second air intake valve.

3. The VPSA oxygen generator as described in claim 2, characterized in that, The metering component includes an AC valve and a flow meter, with the AC valve positioned between the outlet buffer tank and the flow meter.

4. The VPSA oxygen generator as described in claim 3, characterized in that, The VPSA oxygen generator also includes a vacuum bypass valve and a blower bypass valve. The inlet of the vacuum bypass valve is connected to the inlet buffer tank, and the outlet of the vacuum bypass valve is connected to the first inlet valve and the second inlet valve. The blower bypass valves are all connected to the inlet buffer tank and the outlet vacuum pump blower.

5. The VPSA oxygen generator as described in claim 4, characterized in that, The VPSA oxygen generator also includes an outlet silencer, which is connected to the outlet vacuum pump blower.

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