Molecular sieve adsorption device for PSA oxygen generator and method thereof

Abstract

This invention relates to the field of molecular sieve adsorption technology for PSA oxygen generators, and discloses a molecular sieve adsorption device and method for PSA oxygen generators. The device includes a fixed frame, with a desorption mechanism and a rotation mechanism inside the fixed frame. The desorption mechanism includes a first adsorption tower, and a second adsorption tower is located inside the fixed frame. Both the first and second adsorption towers are fixedly connected to an inlet pipe and an outlet pipe on their outer surfaces. This molecular sieve adsorption device and method for PSA oxygen generators, by incorporating a vacuum pump, enables adsorption and desorption in the first and second adsorption towers. After the adsorption process is complete, a vacuum is applied to the inside of the adsorption towers, rapidly reducing the pressure inside. This causes nitrogen molecules adsorbed on the molecular sieve surface to desorb due to the pressure reduction. The vacuum forcefully removes most of the desorbed nitrogen, thereby regenerating the molecular sieve and ensuring that the adsorption towers can continuously and efficiently perform oxygen separation.

Description

Technical Field

[0001] This invention relates to the field of molecular sieve adsorption technology for PSA oxygen generators, specifically to a molecular sieve adsorption device and method for PSA oxygen generators. Background Technology

[0002] PSA oxygen concentrators utilize pressure changes to separate gases. Molecular sieves are commonly used adsorbent materials in PSA oxygen concentrators. Their main function is to separate oxygen and nitrogen based on the size and polarity of different gas molecules. Under certain pressure, some components in the gas mixture, such as nitrogen, are adsorbed by the pores of the molecular sieve, while oxygen passes through. This process depends on the physical properties of the gas molecules, such as molecular diameter, polarity, and interaction forces with the molecular sieve material.

[0003] Traditional PSA oxygen generators typically use exhaust pressure reduction when desorbing and regenerating saturated molecular sieves. However, this method has low regeneration efficiency, especially since some nitrogen molecules may remain deep in the molecular sieve channels and are difficult to completely desorb, causing the adsorption capacity of the molecular sieve to gradually decrease, which in turn affects the oxygen purity and the continuous operational stability of the equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a molecular sieve adsorption device and method for PSA oxygen generators to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a molecular sieve adsorption device and method for a PSA oxygen generator, comprising a fixed frame, wherein a desorption mechanism is provided inside the fixed frame, and a rotation mechanism is provided inside the fixed frame;

[0006] The desorption mechanism includes a first adsorption tower, and a second adsorption tower is disposed inside the fixed frame. The outer surfaces of the first and second adsorption towers are fixedly connected to an inlet pipe and an outlet pipe. The bottom end of each inlet pipe and the top end of each outlet pipe are fixedly connected to a sealing rotary joint. The fixed ends of two of the sealing rotary joints are jointly connected to a first multi-port pipe, and the top ends of the other two sealing rotary joints are fixedly connected to a second multi-port pipe. The outer surfaces of the first and second multi-port pipes are fixedly connected to two first solenoid valves, and the outer surface of the second multi-port pipe is fixedly connected to a second solenoid valve. Vacuum pumps are fixedly installed on the upper surfaces of both the first and second adsorption towers.

[0007] Preferably, the rotating mechanism includes a servo motor, the output end of which is fixedly connected to a first bevel gear. The outer surface of the first bevel gear is meshed with two second bevel gears. The inner wall of each second bevel gear is fixedly connected to an electromagnetic clutch. The bottom surface of each electromagnetic clutch is fixedly connected to the inner bottom wall of the fixed frame. The output end of each electromagnetic clutch is fixedly connected to a worm gear. The outer surface of each worm gear is meshed with a worm wheel. The inner wall of each worm wheel is fixedly connected to the outer surface of the air intake pipe.

[0008] Preferably, the bottom surface of the fixed frame is fixedly connected to four support legs, and each support leg has an installation hole on its upper surface.

[0009] Preferably, each of the air inlet pipes and air outlet pipes is fixedly connected to a bearing on its outer surface, and the outer ring of each bearing is fixedly connected to the inner wall of the fixed frame.

[0010] Preferably, the outer surfaces of the first multi-port pipe and the second multi-port pipe are each fixedly connected to two stabilizing plates, and the two sets of stabilizing plates are respectively fixedly connected to the upper surface and the bottom surface of the fixed frame on their respective sides.

[0011] Preferably, the right ends of the first multi-port pipe and the second multi-port pipe are both fixedly connected to flanges, and each flange has six mating holes on its left side.

[0012] Preferably, the outer surfaces of the first adsorption tower and the second adsorption tower are both fixedly connected to a release pipe, and the outer surface of each release pipe is fixedly connected to a third solenoid valve.

[0013] Preferably, the upper surfaces of the first adsorption tower and the second adsorption tower are each fixedly connected to two stabilizing blocks, and the outer surface of each stabilizing block is fixedly connected to the outer surface of the vacuum pump.

[0014] Preferably, each of the worm gears is fixedly connected to a support plate at both ends, and the bottom surface of each support plate is fixedly connected to the inner bottom wall of the fixed frame.

[0015] A method for using a molecular sieve adsorption device for a PSA oxygen generator specifically includes the following steps:

[0016] S1: When in use, first connect the first solenoid valve, the second solenoid valve, the vacuum pump, the third solenoid valve, the servo motor and the electromagnetic clutch to the external power supply. When in use, connect the first multi-port pipe to the external gas supply pipeline and the second multi-port pipe to the oxygen pipeline so that the gas passes through the first adsorption tower to produce oxygen.

[0017] S2: When desorption is required in the first adsorption tower, before desorption, the corresponding electromagnetic clutch is activated according to the object to be desorbed, and the servo motor is started simultaneously. The servo motor drives the first bevel gear to rotate. The first bevel gear, through its meshing with two second bevel gears, transmits power to the engaged electromagnetic clutch. The output end of the electromagnetic clutch then drives the worm to rotate. Since the worm meshes with the worm wheel, and the worm wheel is fixedly sleeved on the outer surface of the inlet pipe, the rotation of the worm drives the worm wheel and the inlet pipe fixedly connected to it to rotate together. The inlet pipe is fixedly connected to the first or second adsorption tower, while the outlet pipe is connected to the first or second adsorption tower. The sealed rotary joint is connected to the second multi-port pipe, enabling the first or second adsorption tower to rotate stably around the inlet and outlet pipes. During the rotation of the adsorption tower, the molecular sieve particles inside it continuously change their relative positions and force directions under the action of centrifugal force. The binding force between the nitrogen molecules that were originally tightly adsorbed in the molecular sieve channels and the channel walls is disturbed and loosened. The molecular sieve particles themselves also produce small displacements and collisions, further weakening the adsorption force of nitrogen molecules and making it easier for nitrogen molecules to desorb from the surface of the molecular sieve, thereby significantly improving the desorption efficiency and making full preparations for the subsequent adsorption oxygen production process.

[0018] S3: During desorption, close the first solenoid valves at both ends of the first adsorption tower and open the first solenoid valves at both ends of the second adsorption tower. This allows the raw material gas to enter the second adsorption tower through the first multi-port pipe and the inlet pipe for adsorption and oxygen production. At the same time, open the third solenoid valve on the first adsorption tower to first discharge the high-pressure gas remaining inside the first adsorption tower, reducing its adsorption capacity for nitrogen molecules. Then, close the third solenoid valve and start the vacuum pump at the top of the first adsorption tower. The vacuum pump performs vacuuming inside the first adsorption tower, rapidly reducing the pressure inside the tower to a lower level. This causes a large amount of nitrogen molecules in the molecular sieve channels to desorb due to the sharp drop in pressure. The vacuum pump then forcefully extracts the desorbed nitrogen from the adsorption tower, achieving preliminary molecular sieve regeneration.

[0019] S4: In the final stage of desorption, close the second solenoid valve and open the first solenoid valve at the top of the first adsorption tower and the third solenoid valve on the first adsorption tower. This allows some of the oxygen-enriched gas produced by the second adsorption tower to flow back into the first adsorption tower through the second multi-port pipe, counter-currently purging the molecular sieve inside. During the flow, the oxygen-enriched gas can reverse-push and carry out residual nitrogen molecules and any trace amounts of water vapor and other impurities deep within the molecular sieve pores, further improving the regeneration cleanliness of the molecular sieve. After desorption is complete, restore the oxygen production channel of the second adsorption tower. The same method can be used when desorption of the second adsorption tower is required.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] First, this invention, by incorporating a vacuum pump, enables adsorption and desorption in both the first and second adsorption towers. The vacuum process is applied to the interior of the adsorption towers after the adsorption process is complete, rapidly reducing the pressure inside. This causes nitrogen molecules adsorbed on the molecular sieve surface to desorb due to the reduced pressure. The vacuum forcefully removes most of the desorbed nitrogen, thereby regenerating the molecular sieve and ensuring continuous and efficient oxygen separation. This effectively improves the oxygen production and purity of the PSA oxygen generator. Simultaneously, through the coordination of the first and second multi-port pipes, as well as the first and second solenoid valves, when one adsorption tower becomes saturated, the oxygen-enriched product from the other adsorption tower can be backflowed to the saturated tower for purging. This backflow completely removes any remaining nitrogen and water vapor from the molecular sieve micropores, further enhancing the regeneration effect of the molecular sieve and preventing residual impurities from affecting subsequent adsorption efficiency.

[0022] Secondly, this invention incorporates a servo motor that drives the first bevel gear to rotate. The first bevel gear, through meshing with two second bevel gears, simultaneously drives electromagnetic clutches on both sides. When rotation of the first or second adsorption tower is required, the corresponding electromagnetic clutch engages, transmitting power to the worm gear. The worm gear meshes with the worm wheel, thereby rotating the intake pipe, which is fixedly connected to the worm wheel. Since the intake pipe is fixedly connected to the adsorption tower, and the outlet pipe is connected to the second multi-port pipe via a sealed rotary joint, the adsorption tower can rotate stably around the intake and outlet pipes. This rotation causes the nitrogen particles to continuously change their force direction, disturbing and loosening the binding force between the molecules and the molecular sieve channels. This results in micro-displacement of the molecular sieve particles, loosening the nitrogen adsorption force, increasing the desorption rate, and making it easier to expel the nitrogen. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a perspective view of the fixed frame of the present invention in cross-section;

[0025] Figure 3 This is a perspective view of the first adsorption tower of the present invention from below;

[0026] Figure 4 This is a perspective view of the first multi-port tube of the present invention;

[0027] Figure 5 This is a perspective view of the electromagnetic clutch of the present invention;

[0028] Figure 6 This is a perspective view of the vacuum pump of the present invention.

[0029] The components include: 1. Fixed frame; 2. Desorption mechanism; 201. First adsorption tower; 202. Second adsorption tower; 203. Inlet pipe; 204. Outlet pipe; 205. Sealing rotary joint; 206. Second multi-port pipe; 207. First solenoid valve; 208. Second solenoid valve; 209. First multi-port pipe; 210. Vacuum pump; 3. Rotation mechanism; 301. Servo motor; 302. First bevel gear; 303. Second bevel gear; 304. Electromagnetic clutch; 305. Worm gear; 306. Worm wheel; 4. Support leg; 5. Mounting hole; 6. Stabilizing plate; 7. Bearing; 8. Flange; 9. Connecting hole; 10. Support plate; 11. Release pipe; 12. Third solenoid valve; 13. Stabilizing block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see Figure 1-6 It includes a fixed frame 1, a desorption mechanism 2 is provided inside the fixed frame 1, and a rotation mechanism 3 is provided inside the fixed frame 1;

[0033] The desorption mechanism 2 includes a first adsorption tower 201 and a second adsorption tower 202 inside the fixed frame 1. The outer surfaces of both the first and second adsorption towers 201 and 202 are fixedly connected to an inlet pipe 203 and an outlet pipe 204. The bottom end of each inlet pipe 203 and the top end of each outlet pipe 204 are fixedly connected to a sealing rotary joint 205. The fixed ends of two sealing rotary joints 205 are jointly connected to a first multi-port pipe 209, and the top ends of the other two sealing rotary joints 205 are fixedly connected to a second multi-port pipe 206. The outer surfaces of both the first and second multi-port pipes 209 and 206 are fixedly connected to two first solenoid valves 207, and the outer surface of the second multi-port pipe 206 is fixedly connected to a second solenoid valve 208. A vacuum pump 210 is fixedly installed on the upper surfaces of both the first and second adsorption towers 201 and 202. By setting up the desorption mechanism 2, the regeneration effect of the molecular sieve can be further improved, and the impact of residual impurities on subsequent adsorption efficiency can be avoided.

[0034] The bottom surface of the fixed frame 1 is fixedly connected with four support legs 4. Each support leg 4 has a mounting hole 5 on its upper surface. By using the support legs 4 and mounting holes 5, the entire device can be stably installed in the designated working position, which enhances the stability of the device during operation and prevents displacement or tipping caused by equipment vibration.

[0035] Each inlet pipe 203 and outlet pipe 204 has a bearing 7 fixedly connected to its outer surface. The outer ring of each bearing 7 is fixedly connected to the inner wall of the fixed frame 1. The bearing 7 provides stable support for the rotation of the inlet pipe 203 and outlet pipe 204, effectively reducing the frictional resistance of the inlet pipe 203 and outlet pipe 204 during rotation, ensuring the smoothness and stability of the adsorption tower rotation, and avoiding direct contact between the inlet pipe 203 and outlet pipe 204 and the fixed frame 1 to prevent wear.

[0036] Two stabilizing plates 6 are fixedly connected to the outer surfaces of the first multi-port pipe 209 and the second multi-port pipe 206. The two sets of stabilizing plates 6 are fixedly connected to the upper and lower surfaces of the fixed frame 1 respectively on their side closest to each other. The stabilizing plates 6 can effectively fix and support the first multi-port pipe 209 and the second multi-port pipe 206, preventing the multi-port pipe from shifting or shaking due to pressure changes or equipment vibration during gas transportation.

[0037] The right ends of the first multi-port pipe 209 and the second multi-port pipe 206 are both fixedly connected to flanges 8. Each flange 8 has six mating holes 9 on its left side. The flanges 8 and mating holes 9 facilitate quick and sealed connection of the first multi-port pipe 209 and the second multi-port pipe 206 to external gas source pipes and oxygen output pipes. The first multi-port pipe 209 is connected to the external compressed gas supply pipe, and the second multi-port pipe 206 is connected to the external oxygen pipe. The even distribution of the six mating holes 9 ensures the stability and sealing of the connection, effectively preventing gas leakage at the connection and ensuring the normal operation of the entire oxygen generation system.

[0038] The outer surfaces of the first adsorption tower 201 and the second adsorption tower 202 are both fixedly connected to release pipes 11. The outer surface of each release pipe 11 is fixedly connected to a third solenoid valve 12. When the adsorption tower completes the desorption and regeneration process, the third solenoid valve 12 opens, which can quickly discharge the residual desorbed gas in the tower through the release pipe 11, so as to avoid these residual gases from mixing with the raw material gas in the subsequent adsorption process.

[0039] Two stabilizing blocks 13 are fixedly connected to the upper surfaces of the first adsorption tower 201 and the second adsorption tower 202. The outer surface of each stabilizing block 13 is fixedly connected to the outer surface of the vacuum pump 210. The stabilizing blocks 13 can firmly fix the vacuum pump 210, ensuring that the vacuum pump 210 will not be displaced or loosened due to vibration during operation, and ensuring the sealing and stability of the connection between the vacuum pump 210 and the adsorption tower.

[0040] The specific implementation method of this embodiment is as follows: In use, firstly, the first solenoid valve 207, the second solenoid valve 208, the vacuum pump 210, and the third solenoid valve 12 are connected to an external power supply. When it is necessary to perform desorption on the first adsorption tower 201, the first solenoid valves 207 at both ends of the first adsorption tower 201 are closed, and the first solenoid valves 207 at both ends of the second adsorption tower 202 are opened simultaneously, allowing the raw material gas to enter the second adsorption tower 202 through the first multi-port pipe 209 and the inlet pipe 203 for adsorption and oxygen production. At the same time, the third solenoid valve 12 on the first adsorption tower 201 is opened to first discharge the high-pressure gas remaining inside the first adsorption tower 201, reducing the adsorption capacity for nitrogen molecules. Then, the third solenoid valve 12 is closed, and the vacuum pump 210 at the top of the first adsorption tower 201 is started. The vacuum pump 210 performs vacuuming treatment inside the first adsorption tower 201, quickly reducing the pressure inside the tower to... At a lower pressure level, nitrogen molecules in the molecular sieve channels are desorbed in large quantities due to the sharp drop in pressure. Vacuum pump 210 forcefully extracts the desorbed nitrogen from the adsorption tower, achieving initial molecular sieve regeneration. In the final desorption process, the second solenoid valve 208 is closed and the first solenoid valve 207 at the top of the first adsorption tower 201 and the third solenoid valve 12 on the first adsorption tower 201 are opened, allowing some of the oxygen-enriched gas produced by the second adsorption tower 202 to flow back into the first adsorption tower 201 through the second multi-port pipe 206, counter-currently purging the molecular sieve inside. During the flow, the oxygen-enriched gas can reverse-push and carry out residual nitrogen molecules and possible trace amounts of water vapor and other impurities deep in the molecular sieve channels, further improving the regeneration cleanliness of the molecular sieve. After desorption is completed, the oxygen production channel of the second adsorption tower 202 is restored. The same method can be used when desorption of the second adsorption tower 202 is required.

[0041] Example 2

[0042] Please see Figure 1-6 The rotating mechanism 3 includes a servo motor 301. The output end of the servo motor 301 is fixedly connected to a first bevel gear 302. The outer surface of the first bevel gear 302 is meshed with two second bevel gears 303. The inner wall of each second bevel gear 303 is fixedly connected to an electromagnetic clutch 304. The bottom surface of each electromagnetic clutch 304 is fixedly connected to the inner bottom wall of the fixed frame 1. The output end of each electromagnetic clutch 304 is fixedly connected to a worm gear 305. The outer surface of each worm gear 305 is meshed with a worm wheel 306. The inner wall of each worm wheel 306 is fixedly connected to the outer surface of the air inlet pipe 203. By setting the rotating mechanism 3, the binding force between molecules and molecular sieve channels can be disturbed and loosened, causing the molecular sieve particles to undergo micro-displacement, loosening the nitrogen adsorption force, and improving the desorption rate.

[0043] Each worm 305 has a support plate 10 fixedly connected to both ends. The bottom surface of each support plate 10 is fixedly connected to the inner bottom wall of the fixed frame 1. The support plate 10 can stably support both ends of the worm 305, ensuring that the worm 305 will not move axially or radially during rotation, thereby ensuring the precise meshing between the worm 305 and the worm wheel 306.

[0044] The specific implementation of this embodiment is as follows: In use, firstly, the servo motor 301 and the electromagnetic clutch 304 are connected to an external power source. Before performing the desorption operation, the electromagnetic clutch 304 corresponding to the object to be desorbed is activated, and the servo motor 301 is started simultaneously. The servo motor 301 drives the first bevel gear 302 to rotate. The first bevel gear 302 transmits power to the engaged electromagnetic clutch 304 through its meshing with two second bevel gears 303. The output end of the electromagnetic clutch 304 then drives the worm 305 to start rotating. Since the worm 305 meshes with the worm wheel 306, and the worm wheel 306 is fixedly sleeved on the outer surface of the intake pipe 203, the rotation of the worm 305 drives the worm wheel 306 and the intake pipe 203 fixedly connected to it to rotate together. 03 is fixedly connected to the first adsorption tower 201 or the second adsorption tower 202, while the outlet pipe 204 is connected to the second multi-port pipe 206 through the sealed rotary joint 205, so that the first adsorption tower 201 or the second adsorption tower 202 can rotate stably with the inlet pipe 203 and the outlet pipe 204 as the axis. During the rotation of the adsorption tower, the molecular sieve particles inside it continuously change their relative position and force direction under the action of centrifugal force. The binding force between the nitrogen molecules that were originally tightly adsorbed in the molecular sieve channels and the channel wall is disturbed and loosened. The molecular sieve particles themselves also produce small displacements and collisions, which further weakens the adsorption force of nitrogen molecules, making it easier for nitrogen molecules to desorb from the surface of the molecular sieve, thereby significantly improving the desorption efficiency and making full preparations for the subsequent adsorption oxygen production process.

[0045] The working principle of this invention is as follows: When in use, first connect the first solenoid valve 207, the second solenoid valve 208, the vacuum pump 210, the third solenoid valve 12, the servo motor 301 and the electromagnetic clutch 304 to the external power supply. When in use, connect the first multi-port pipe 209 to the external gas supply pipeline and connect the second multi-port pipe 206 to the oxygen pipeline so that the gas passes through the first adsorption tower 201 to produce oxygen.

[0046] When desorption is required in the first adsorption tower 201, before desorption, the corresponding electromagnetic clutch 304 is activated according to the object to be desorbed, and the servo motor 301 is started simultaneously. The servo motor 301 drives the first bevel gear 302 to rotate. The first bevel gear 302 transmits power to the engaged electromagnetic clutch 304 through its meshing with two second bevel gears 303. The output end of the electromagnetic clutch 304 then drives the worm 305 to start rotating. Since the worm 305 meshes with the worm wheel 306, and the worm wheel 306 is fixedly sleeved on the outer surface of the air inlet pipe 203, the rotation of the worm 305 drives the worm wheel 306 and the air inlet pipe 203 fixedly connected to it to rotate together. The air inlet pipe 203 and the first adsorption tower 201 or the second adsorption tower 202 are then rotated together. The two adsorption towers 202 are fixedly connected, while the outlet pipe 204 is connected to the second multi-port pipe 206 through a sealed rotary joint 205. This allows the first adsorption tower 201 or the second adsorption tower 202 to rotate stably around the inlet pipe 203 and the outlet pipe 204. During the rotation of the adsorption tower, the molecular sieve particles inside it continuously change their relative position and force direction under the action of centrifugal force. The binding force between the nitrogen molecules that were originally tightly adsorbed in the molecular sieve channels and the channel walls is disturbed and loosened. The molecular sieve particles themselves also produce small displacements and collisions, which further weakens the adsorption force of nitrogen molecules and makes it easier for nitrogen molecules to desorb from the surface of the molecular sieve, thereby significantly improving the desorption efficiency and making full preparations for the subsequent adsorption oxygen production process.

[0047] During desorption, the first solenoid valves 207 at both ends of the first adsorption tower 201 are closed, while the first solenoid valves 207 at both ends of the second adsorption tower 202 are opened, allowing the raw material gas to enter the second adsorption tower 202 through the first multi-port pipe 209 and the inlet pipe 203 for adsorption and oxygen production. At the same time, the third solenoid valve 12 on the first adsorption tower 201 is opened to first discharge the high-pressure gas remaining inside the first adsorption tower 201, reducing the adsorption capacity for nitrogen molecules. Then, the third solenoid valve 12 is closed, and the vacuum pump 210 at the top of the first adsorption tower 201 is started. The vacuum pump 210 performs vacuum treatment inside the first adsorption tower 201, quickly reducing the pressure inside the tower to a lower level, causing a large amount of nitrogen molecules in the molecular sieve channels to desorb due to the sharp drop in pressure. The vacuum pump 210 forcefully extracts the desorbed nitrogen from the adsorption tower, achieving preliminary molecular sieve regeneration.

[0048] In the final stage of desorption, the second solenoid valve 208 is closed and the first solenoid valve 207 at the top of the first adsorption tower 201 and the third solenoid valve 12 on the first adsorption tower 201 are opened. This allows some of the oxygen-enriched gas produced by the second adsorption tower 202 to flow back into the first adsorption tower 201 through the second multi-port pipe 206, thus counter-currently purging the molecular sieve inside. During the flow, the oxygen-enriched gas can reverse-push and carry out residual nitrogen molecules and any trace amounts of water vapor and other impurities deep within the molecular sieve channels, further improving the regeneration cleanliness of the molecular sieve. After desorption is completed, the oxygen production channel of the second adsorption tower 202 is restored. The same method can be used when desorption of the second adsorption tower 202 is required.

[0049] A method for using a molecular sieve adsorption device for a PSA oxygen generator specifically includes the following steps:

[0050] S1: When in use, first connect the first solenoid valve 207, the second solenoid valve 208, the vacuum pump 210, the third solenoid valve 12, the servo motor 301 and the electromagnetic clutch 304 to the external power supply. When in use, connect the first multi-port pipe 209 to the external gas supply pipeline and connect the second multi-port pipe 206 to the oxygen pipeline so that the gas passes through the first adsorption tower 201 to produce oxygen.

[0051] S2: When desorption is required on the first adsorption tower 201, before desorption, the corresponding electromagnetic clutch 304 is activated according to the object to be desorbed, and the servo motor 301 is started simultaneously. The servo motor 301 drives the first bevel gear 302 to rotate. The first bevel gear 302 transmits power to the engaged electromagnetic clutch 304 through its meshing with two second bevel gears 303. The output end of the electromagnetic clutch 304 then drives the worm 305 to start rotating. Since the worm 305 meshes with the worm wheel 306, and the worm wheel 306 is fixedly sleeved on the outer surface of the air inlet pipe 203, the rotation of the worm 305 drives the worm wheel 306 and the air inlet pipe 203 fixedly connected to it to rotate together. The air inlet pipe 203 and the first adsorption tower 201... Alternatively, the second adsorption tower 202 can be fixedly connected, and the outlet pipe 204 can be connected to the second multi-port pipe 206 through a sealed rotary joint 205, so that the first adsorption tower 201 or the second adsorption tower 202 can rotate stably around the inlet pipe 203 and the outlet pipe 204 as the axis. During the rotation of the adsorption tower, the molecular sieve particles inside it continuously change their relative position and force direction under the action of centrifugal force. The binding force between the nitrogen molecules that were originally tightly adsorbed in the molecular sieve channels and the channel wall is disturbed and loosened. The molecular sieve particles themselves also produce small displacements and collisions, which further weakens the adsorption force of nitrogen molecules, making it easier for nitrogen molecules to desorb from the surface of the molecular sieve, thereby significantly improving the desorption efficiency and making full preparations for the subsequent adsorption oxygen production process.

[0052] S3: During desorption, the first solenoid valves 207 at both ends of the first adsorption tower 201 are closed, and the first solenoid valves 207 at both ends of the second adsorption tower 202 are opened simultaneously, allowing the raw material gas to enter the second adsorption tower 202 through the first multi-port pipe 209 and the inlet pipe 203 for adsorption and oxygen production. At the same time, the third solenoid valve 12 on the first adsorption tower 201 is opened to first discharge the high-pressure gas stored inside the first adsorption tower 201, reducing the adsorption capacity for nitrogen molecules. Then, the third solenoid valve 12 is closed, and the vacuum pump 210 at the top of the first adsorption tower 201 is started. The vacuum pump 210 performs vacuum treatment inside the first adsorption tower 201, quickly reducing the pressure inside the tower to a lower level, causing a large amount of nitrogen molecules in the molecular sieve channels to desorb due to the sharp decrease in pressure. The vacuum pump 210 forcefully extracts the desorbed nitrogen from the adsorption tower, realizing the initial regeneration of the molecular sieve.

[0053] S4: In the final process of desorption, close the second solenoid valve 208 and open the first solenoid valve 207 at the top of the first adsorption tower 201 and the third solenoid valve 12 on the first adsorption tower 201. This allows some of the oxygen-enriched gas produced by the second adsorption tower 202 to flow back into the first adsorption tower 201 through the second multi-port pipe 206, thus counter-currently purging the molecular sieve inside. During the flow, the oxygen-enriched gas can reverse-push and carry out residual nitrogen molecules and possible trace amounts of water vapor and other impurities deep in the molecular sieve channels, further improving the regeneration cleanliness of the molecular sieve. After desorption is completed, restore the oxygen production channel of the second adsorption tower 202. The same method can be used when desorption of the second adsorption tower 202 is required.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A molecular sieve adsorption device for a PSA oxygen generator, comprising a fixed frame (1), characterized in that: The fixed frame (1) is provided with a desorption mechanism (2) and a rotation mechanism (3). The desorption mechanism (2) includes a first adsorption tower (201), and a second adsorption tower (202) is provided inside the fixed frame (1). The outer surfaces of the first adsorption tower (201) and the second adsorption tower (202) are fixedly connected to an inlet pipe (203) and an outlet pipe (204). The bottom end of each inlet pipe (203) and the top end of each outlet pipe (204) are fixedly connected to a sealing rotary joint (205). The fixed ends of two sealing rotary joints (205) are fixedly connected to a first multi-port pipe (209), and the top ends of the other two sealing rotary joints (205) are fixedly connected to a second multi-port pipe (206). The outer surfaces of the first multi-port pipe (209) and the second multi-port pipe (206) are fixedly connected to two first solenoid valves (207), and the outer surface of the second multi-port pipe (206) is fixedly connected to a second solenoid valve (208). Vacuum pumps (210) are fixedly installed on the upper surfaces of the first adsorption tower (201) and the second adsorption tower (202).

2. The molecular sieve adsorption device for a PSA oxygen generator according to claim 1, characterized in that: The rotating mechanism (3) includes a servo motor (301). The output end of the servo motor (301) is fixedly connected to a first bevel gear (302). The outer surface of the first bevel gear (302) is meshed with two second bevel gears (303). The inner wall of each second bevel gear (303) is fixedly connected to an electromagnetic clutch (304). The bottom surface of each electromagnetic clutch (304) is fixedly connected to the inner bottom wall of the fixed frame (1). The output end of each electromagnetic clutch (304) is fixedly connected to a worm (305). The outer surface of each worm (305) is meshed with a worm wheel (306). The inner wall of each worm wheel (306) is fixedly connected to the outer surface of the air intake pipe (203).

3. The molecular sieve adsorption device for a PSA oxygen generator according to claim 1, characterized in that: The bottom surface of the fixed frame (1) is fixedly connected with four support legs (4), and each support leg (4) has an installation hole (5) on its upper surface.

4. The molecular sieve adsorption device for a PSA oxygen generator according to claim 1, characterized in that: Each of the air inlet pipes (203) and air outlet pipes (204) has a bearing (7) fixedly connected to its outer surface, and the outer ring of each bearing (7) is fixedly connected to the inner wall of the fixed frame (1).

5. A molecular sieve adsorption device for a PSA oxygen generator according to claim 1, characterized in that: Two stabilizing plates (6) are fixedly connected to the outer surfaces of the first multi-port pipe (209) and the second multi-port pipe (206). The two sets of stabilizing plates (6) are fixedly connected to the upper and lower surfaces of the fixed frame (1) respectively on their side closest to each other.

6. The molecular sieve adsorption device for a PSA oxygen generator according to claim 1, characterized in that: The right ends of the first multi-port pipe (209) and the second multi-port pipe (206) are fixedly connected with flanges (8), and each flange (8) has six mating holes (9) on its left side.

7. A molecular sieve adsorption device for a PSA oxygen generator according to claim 1, characterized in that: The outer surfaces of the first adsorption tower (201) and the second adsorption tower (202) are both fixedly connected to a release pipe (11), and the outer surface of each release pipe (11) is fixedly connected to a third solenoid valve (12).

8. A molecular sieve adsorption device for a PSA oxygen generator according to claim 1, characterized in that: The upper surfaces of the first adsorption tower (201) and the second adsorption tower (202) are each fixedly connected to two stabilizing blocks (13), and the outer surface of each stabilizing block (13) is fixedly connected to the outer surface of the vacuum pump (210).

9. A molecular sieve adsorption device for a PSA oxygen generator according to claim 2, characterized in that: Each of the worm gears (305) has a support plate (10) fixedly connected to both ends, and the bottom surface of each support plate (10) is fixedly connected to the inner bottom wall of the fixed frame (1).

10. A method of using a molecular sieve adsorption device for a PSA oxygen generator according to any one of claims 1-9, characterized in that: Specifically, the following steps are included: S1: When in use, first connect the first solenoid valve (207), the second solenoid valve (208), the vacuum pump (210), the third solenoid valve (12), the servo motor (301) and the electromagnetic clutch (304) to the external power supply. When in use, connect the first multi-port pipe (209) to the external gas supply pipeline and connect the second multi-port pipe (206) to the oxygen pipeline so that the gas passes through the first adsorption tower (201) to produce oxygen. S2: When desorption is required in the first adsorption tower (201), before desorption, the corresponding electromagnetic clutch (304) is activated according to the object to be desorbed, and the servo motor (301) is started. The servo motor (301) drives the first bevel gear (302) to rotate. The first bevel gear (302) transmits power to the engaged electromagnetic clutch (304) through the meshing relationship with the two second bevel gears (303). The output end of the electromagnetic clutch (304) then drives the worm (305) to start rotating. Since the worm (305) meshes with the worm wheel (306) and the worm wheel (306) is fixedly sleeved on the outer surface of the air inlet pipe (203), the rotation of the worm (305) drives the worm wheel (306) and the air inlet pipe (203) fixedly connected to it to rotate together. The first adsorption tower (201) or the second adsorption tower (202) is fixedly connected, and the outlet pipe (204) is connected to the second multi-port pipe (206) through a sealed rotary joint (205), so that the first adsorption tower (201) or the second adsorption tower (202) can rotate stably with the inlet pipe (203) and the outlet pipe (204) as the axis. During the rotation of the adsorption tower, the molecular sieve particles inside it continuously change their relative position and force direction under the action of centrifugal force. The binding force between the nitrogen molecules that were originally tightly adsorbed in the molecular sieve pores and the pore wall is disturbed and loosened. The molecular sieve particles themselves also produce small displacements and collisions, which further weakens the adsorption force of nitrogen molecules, making it easier for nitrogen molecules to desorb from the surface of the molecular sieve, thereby significantly improving the desorption efficiency and making full preparations for the subsequent adsorption oxygen production process. S3: During desorption, the first solenoid valves (207) at both ends of the first adsorption tower (201) are closed, and the first solenoid valves (207) at both ends of the second adsorption tower (202) are opened at the same time, so that the raw material gas enters the second adsorption tower (202) through the first multi-port pipe (209) and the inlet pipe (203) for adsorption and oxygen production. At the same time, the third solenoid valve (12) on the first adsorption tower (201) is opened to first discharge the high-pressure gas stored inside the first adsorption tower (201) and reduce the adsorption capacity for nitrogen molecules. Then the third solenoid valve (12) is closed, and the vacuum pump (210) at the top of the first adsorption tower (201) is started. The vacuum pump (210) performs vacuum treatment inside the first adsorption tower (201) and quickly reduces the pressure inside the tower to a lower level, causing a large amount of nitrogen molecules in the molecular sieve channels to desorb due to the sharp decrease in pressure. The vacuum pump (210) forcefully extracts the desorbed nitrogen from the adsorption tower to achieve the initial regeneration of the molecular sieve. S4: In the final process of desorption, close the second solenoid valve (208) and open the first solenoid valve (207) at the top of the first adsorption tower (201) and the third solenoid valve (12) on the first adsorption tower (201), so that part of the oxygen-enriched gas produced by the second adsorption tower (202) flows back into the first adsorption tower (201) through the second multi-port pipe (206) to purge the molecular sieve inside. During the flow of the oxygen-enriched gas, it can push out the nitrogen molecules and possible trace water vapor and other impurities that remain deep in the molecular sieve pores, further improving the regeneration cleanliness of the molecular sieve. After desorption is completed, restore the oxygen production channel of the second adsorption tower (202). The same method can be used when desorption of the second adsorption tower (202) is required.

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