A nitrogen production equipment system and process flow thereof

Abstract

The application relates to a nitrogen production equipment system and a process flow thereof, and belongs to the field of nitrogen production technology. The system comprises an air compressor, a purification mechanism, a buffer tank, reaction tanks, a gas storage tank and a cleaning mechanism. The purification mechanism is communicatively arranged on the air compressor and used for filtering impurities in compressed gas generated by the air compressor. The buffer tank is communicatively arranged on the purification mechanism. At least two reaction tanks are communicatively arranged on the buffer tank. An adsorption zone and a recovery zone are formed in the reaction tank. Carbon molecular sieve is filled in the adsorption zone. An exhaust port is communicatively arranged on the reaction tank and connected with the adsorption zone. The gas storage tank is communicatively arranged on the adsorption zones of the two reaction tanks. The cleaning mechanism is arranged on the reaction tank and used for cleaning the carbon molecular sieve in the adsorption zone. The application can improve the recovery effect of the carbon molecular sieve in the reaction tank, keep good adsorption effect of the carbon molecular sieve during each adsorption, and improve the nitrogen production efficiency and quality.

Description

Technical Field

[0001] This application relates to the field of nitrogen generation technology, and in particular to a nitrogen generation equipment system and its process flow. Background Technology

[0002] Nitrogen production refers to the physical separation of oxygen and nitrogen from the air to obtain high-purity nitrogen. Nitrogen production systems typically use air as a raw material and employ various physical methods to separate the nitrogen. Currently, common nitrogen production technologies on the market include cryogenic air separation, membrane separation, and pressure swing adsorption (PSA). Cryogenic air separation involves complex equipment and high energy consumption, making it unsuitable for small-scale systems. Membrane separation produces nitrogen with lower purity, failing to meet the demands of high-end applications. In contrast, pressure swing adsorption, due to its simple equipment, convenient operation, and low operating costs, is widely used in small and medium-sized nitrogen production systems.

[0003] Existing pressure swing adsorption (PSA) nitrogen generators typically employ a two- or multi-tank circulating adsorption process. The two reaction tanks are connected by pipelines, and the inside of the reaction tanks is filled with adsorbent material to adsorb oxygen and other impurities in the air. The two reaction tanks are switched during use. When one reaction tank is adsorbing, the other reaction tank is connected to the atmosphere to discharge the adsorbed gas, thereby achieving regeneration or recovery and thus achieving continuous nitrogen production.

[0004] Since the adsorbent material sieves components in the air through its internal micropores, when the reaction vessel is regenerated or restored, dust and other impurities in the air are difficult to be effectively removed from the adsorbent material. This results in a low regeneration or restoration effect of the adsorbent material in the reaction vessel, affecting the adsorption effect of the adsorbent material in the next cycle, and consequently reducing the subsequent nitrogen production efficiency and quality. Summary of the Invention

[0005] In order to improve nitrogen production efficiency and quality, this application provides a nitrogen production equipment system and its process flow.

[0006] The nitrogen generation equipment system provided in this application adopts the following technical solution: A nitrogen generation equipment system includes an air compressor, a purification mechanism, a buffer tank, a reaction tank, a storage tank, and a cleaning mechanism. The purification mechanism is connected to the air compressor and is used to filter impurities in the compressed gas produced by the air compressor. The buffer tank is connected to the purification mechanism. At least two reaction tanks are connected to the buffer tank. Each reaction tank is divided into an adsorption zone and a recovery zone. The adsorption zone is filled with carbon molecular sieves. An outlet is provided on the reaction tank and connected to the adsorption zone. The storage tank is connected to the adsorption zone of the two reaction tanks. The cleaning mechanism is located on the reaction tank and is used to clean the carbon molecular sieves in the adsorption zone.

[0007] By adopting the above technical solution, the air compressor compresses air into compressed gas. The compressed gas is then passed into a purification mechanism, which filters impurities from the compressed gas. After filtration, the compressed gas enters a buffer tank to alleviate pressure fluctuations. The compressed gas in the buffer tank then enters the adsorption zone of one of the reaction tanks. The carbon molecular sieves in the adsorption zone adsorb oxygen and other impurities from the compressed air. The separated nitrogen is stored in a storage tank. During the adsorption process, the gas adsorbed by the carbon molecular sieves in the other reaction tank is discharged from the outlet. At the same time, a cleaning mechanism cleans the impurities adsorbed on the carbon molecular sieves in the other reaction tank and moves them to the recovery zone. The compressed gas from the buffer tank is then passed into the cleaned reaction tank. The reaction tank that performed the adsorption operation in the previous operation is then vented and cleaned, thus continuously producing nitrogen. The purification mechanism reduces the impurity content of the compressed gas entering the reaction tank, thereby reducing the amount of impurities adhering to the carbon molecular sieves in the reaction tank. Simultaneously, the cleaning mechanism cleans the impurities on the carbon molecular sieves, improving the recovery effect of the carbon molecular sieves in the reaction tank. This ensures that the carbon molecular sieves maintain a good adsorption effect each time they adsorb, improving nitrogen production efficiency and quality.

[0008] Optionally, the purification mechanism includes an oil separator, a precision filter, a dryer, a dust filter, and an activated carbon filter. The oil separator is connected to the air compressor, the precision filter is connected to the oil separator, the dryer is connected to the precision filter, the dust filter is connected to the dryer, and the activated carbon filter is connected to the dust filter and connected to the reaction tank.

[0009] By adopting the above technical solution, the oil separator filters the oil in the compressed air, the precision filter filters the fine particles in the compressed air, the dryer removes the moisture in the compressed air, the dust filter removes the dust in the compressed air, and the activated carbon filter filters the impurities in the compressed air, thus achieving multiple filtration of the compressed air and improving the purity of the compressed air stored in the buffer tank.

[0010] Optionally, the cleaning mechanism includes a net bag, a vibration motor, a blowing assembly, and a sealing assembly. The net bag is disposed on the inner wall of the reaction vessel to divide the interior of the reaction vessel into an adsorption zone and a recovery zone. The vibration motor is disposed on the net bag. The blowing assembly is disposed on the reaction vessel and is used to blow air onto the net bag. The sealing assembly is disposed on the reaction vessel and is used to seal the bottom of the net bag.

[0011] By adopting the above technical solution, the vibration motor is started, which drives the mesh bag to vibrate, and the mesh bag drives the carbon molecular sieve to vibrate, thereby removing the impurities adhering to the carbon molecular sieve. The impurities fall into the recovery zone through the pores of the mesh bag. At the same time, the blowing component blows air onto the carbon molecular sieve, blowing the impurities on the carbon molecular sieve to the recovery zone, thereby cleaning the carbon molecular sieve and reducing the amount of impurities adhering to the carbon molecular sieve. After cleaning, the sealing component seals the bottom of the mesh bag, and then compressed air can be introduced into the adsorption zone for adsorption.

[0012] Optionally, the net bag includes an outer frame, an inner frame, a buffer spring, a net body, and a positioning element. The outer frame is circumferentially disposed on the inner wall of the reaction vessel, the inner frame is slidably disposed on the outer frame, the vibration motor is disposed on the inner frame, the buffer spring is circumferentially spaced on the inner frame, the buffer spring is connected to the outer frame, the net body is disposed on the inner frame to form a carrier that is hollow inside and open at the top, and the positioning element is disposed on the outer frame and is used to position the inner frame on the outer frame.

[0013] By adopting the above technical solution, the staff first releases the positioning component to position the inner frame on the outer frame, and then starts the vibration motor to drive the inner frame to vibrate. The inner frame drives the mesh to vibrate, which in turn drives the carbon molecular sieve inside the mesh to vibrate. During the vibration, the buffer spring expands and contracts with the vibration of the inner frame, providing buffer for the inner frame and reducing the vibration transmitted from the inner frame to the outer frame. This reduces the vibration of the reaction vessel after the vibration motor is started, and reduces the probability of vibration damage to the reaction vessel.

[0014] Optionally, the positioning component includes a tapered plug and a push rod. Multiple tapered plugs are slidably disposed on the outer frame, and multiple positioning holes are provided on the inner frame for the tapered plugs to be inserted after the vibration motor stops vibrating. The push rod is disposed on the outer frame and is used to drive the tapered plugs to slide.

[0015] By adopting the above technical solution, after the vibration motor is turned off, the buffer spring circumferentially mounted on the inner frame is reset, so that multiple conical plugs are aligned with multiple positioning holes respectively. Then, the conical plugs are pushed into the positioning holes by the push rod, so that the inner frame can be conveniently positioned on the outer frame.

[0016] Optionally, the sealing assembly includes a support frame, a sealing plate, a sealing strip, and a drive motor. The support frame is circumferentially disposed on the inner wall of the reaction vessel, the mesh bag abuts against the support frame, the sealing plate is hinged to the support frame, the sealing strip is circumferentially disposed on the sealing plate, and the drive motor is disposed on the support frame and coaxially connected to the hinge axis of the sealing plate.

[0017] By adopting the above technical solution, when cleaning the carbon molecular sieve, the staff starts the drive motor, which makes the sealing plate rotate away from the support frame, so that the mesh bag is connected to the recovery zone, making it easier for impurities in the carbon molecular sieve in the mesh bag to fall into the recovery zone. After cleaning, the staff starts the drive motor, which makes the sealing plate rotate closer to the support frame. The sealing plate drives the sealing strip to press against the support frame, which separates the adsorption zone and the recovery zone, improving the sealing of the adsorption zone.

[0018] Optionally, the support frame is provided with a positioning component for positioning the closure plate on the support frame. The positioning component includes a positioning block and a positioning cylinder. The positioning block is slidably disposed on the support frame. The positioning block has an opening on one side facing the closure plate. The opening of the positioning block gradually decreases from the direction close to the closure plate to the direction far away from the closure plate. The positioning cylinder is disposed on the support frame and connected to the positioning block.

[0019] By adopting the above technical solution, after the sealing plate and sealing strip are pressed against the support frame, the positioning cylinder is activated. The piston rod of the positioning cylinder drives the positioning block to move towards the sealing plate. The side wall of the opening side of the positioning block squeezes the sealing plate, causing the sealing plate to continue to move towards the support frame, thereby improving the stability of the sealing plate and sealing strip pressed against the support frame and improving the isolation effect between the adsorption area and the sealing area.

[0020] Optionally, the blowing assembly includes an exhaust fan, an air duct, and a high-pressure nozzle. The exhaust fan is connected to the buffer tank, the air duct is connected to the exhaust fan, and the high-pressure nozzle is installed on the reaction tank and connected to the exhaust fan.

[0021] By adopting the above technical solution, the staff starts the exhaust fan, which draws the filtered high-pressure gas in the buffer tank into the high-pressure nozzle through the air guide pipe. The high-pressure gas is then sprayed from the high-pressure nozzle onto the carbon molecular sieve, blowing away the impurities adhering to the carbon molecular sieve.

[0022] Optionally, the top of the reaction vessel is provided with an inspection port, the flange of the inspection port is provided with a cover, the outer frame is slidably disposed on the inner wall of the reaction vessel along the height direction, and the reaction vessel is provided with a control component for driving the outer frame to slide.

[0023] By adopting the above technical solution, when it is necessary to replace the carbon molecular sieve in the mesh body, the staff can open the inspection port and then drive the outer frame to slide towards the inspection port through the control component. The outer frame will drive the mesh body and carbon molecular sieve through the inspection port, and the staff can then take out and replace the carbon molecular sieve in the mesh body, thus improving the convenience of replacing the carbon molecular sieve in the reaction vessel.

[0024] The nitrogen production process provided in this application adopts the following technical solution: A nitrogen production process includes the following steps: S1: The air compressor produces compressed gas from air, and the purification unit filters the compressed gas; S2: The filtered compressed gas enters one of the reaction tanks, and the other reaction tank discharges the adsorbed gas. At the same time, the cleaning mechanism cleans the impurities on the carbon molecular sieve in the adsorption zone of the reaction tank to the recovery zone. S3: The nitrogen gas separated in the reaction vessel is stored in the gas storage tank; S4: Nitrogen gas is pressurized by a booster connected to a gas storage tank, and then the high-pressure nitrogen gas is converted into liquid nitrogen by a liquid nitrogen generator; S5: The filtered compressed gas is introduced into another cleaned reaction tank to discharge the gas adsorbed in the previous reaction tank and clean the previous reaction tank. This process is repeated to continuously produce nitrogen efficiently.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By reducing the impurity content of the compressed gas introduced into the reaction tank through the purification mechanism, the amount of impurities adhering to the carbon molecular sieve in the reaction tank is reduced. At the same time, the cleaning mechanism cleans the impurities on the carbon molecular sieve, improving the recovery effect of the carbon molecular sieve in the reaction tank, so that the carbon molecular sieve can maintain a good adsorption effect each time it adsorbs, thereby improving nitrogen production efficiency and nitrogen production quality. 2. The mesh bag drives the carbon molecular sieve to vibrate, thereby removing the impurities adhering to the carbon molecular sieve. The impurities fall into the recovery zone from the pores of the mesh bag. At the same time, the blowing component blows air onto the carbon molecular sieve, blowing the impurities on the carbon molecular sieve to the recovery zone, thereby cleaning the carbon molecular sieve and reducing the amount of impurities adhering to the carbon molecular sieve. 3. By controlling the components, the outer frame is slid towards the inspection port. The outer frame drives the mesh and carbon molecular sieve through the inspection port, allowing the staff to remove and replace the carbon molecular sieve inside the mesh, thus improving the convenience of replacing the carbon molecular sieve in the reaction vessel. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the nitrogen generation equipment system and its process flow according to an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the structure of the reaction vessel according to an embodiment of this application.

[0028] Figure 3 This is a cross-sectional structural diagram of the reaction vessel according to an embodiment of this application.

[0029] Figure 4 yes Figure 3 A magnified view of part A in the diagram.

[0030] Reference numerals: 1. Air compressor; 2. Purification mechanism; 21. Oil separator; 22. Precision filter; 23. Dryer; 24. Dust filter; 25. Activated carbon filter; 3. Buffer tank; 4. Reaction tank; 5. Air storage tank; 6. Cleaning mechanism; 61. Mesh bag; 611. Outer frame; 612. Inner frame; 613. Buffer spring; 614. Mesh body; 615. Positioning element; 6151. Conical plug; 6152. Push 62. Vibration motor; 63. Blowing assembly; 631. Exhaust fan; 632. Air duct; 633. High-pressure nozzle; 64. Sealing assembly; 641. Support frame; 642. Sealing plate; 643. Sealing strip; 644. Drive motor; 7. Adsorption area; 8. Recovery area; 9. Positioning assembly; 91. Positioning block; 92. Positioning cylinder; 10. Cover; 11. Control assembly; 12. Intensifier; 13. Liquid nitrogen machine. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a nitrogen generation equipment system and its process flow.

[0033] Reference Figure 1 A nitrogen generation equipment system includes an air compressor 1, a purification mechanism 2, a buffer tank 3, a reaction tank 4, a gas storage tank 5, and a cleaning mechanism 6. The purification mechanism 2 is connected and installed on the air compressor 1. The purification mechanism 2 is used to filter impurities in the compressed gas produced by the air compressor 1. The purification mechanism 2 includes an oil separator 21 connected to the outlet end of the air compressor 1 via a pipeline, a precision filter 22 connected to the outlet end of the oil separator 21 via a pipeline, a dryer 23 connected to the outlet end of the precision filter 22 via a pipeline, and a dust filter connected to the outlet end of the dryer 23 via a pipeline. 24 and activated carbon filter 25 are connected to the outlet of dust filter 24 via a pipeline. Buffer tank 3 is connected to the outlet of activated carbon filter 25 via a pipeline. In this embodiment, the bottom of oil remover 21, precision filter 22, dryer 23, dust filter 24, activated carbon filter 25 and buffer tank 3 are all connected to a drain outlet connected to a sewage pipe. A control valve is installed on the drain outlet to facilitate the cleaning of impurities in oil remover 21, precision filter 22, dryer 23, dust filter 24, activated carbon filter 25 and buffer tank 3 by the operator.

[0034] Air compressor 1 compresses air to form compressed gas. The compressed gas passes through an oil separator 21 to filter out oil, a precision filter 22 to filter out fine particles, a dryer 23 to remove moisture, a dust filter 24 to remove dust, and an activated carbon filter 25 to filter out impurities. The compressed gas then enters a buffer tank 3 for storage and pressure stabilization, mitigating pressure fluctuations. Through multiple filtrations, various impurities in the compressed gas are removed, effectively improving the purity of the compressed gas entering the buffer tank 3.

[0035] Reference Figure 1 , Figure 2 At least two reaction vessels 4 are connected to buffer tank 3 via pipes. The reaction vessels 4 are filled with carbon molecular sieves for adsorbing oxygen and other impurities in the compressed gas. In this embodiment, each reaction vessel 4 is equipped with a solenoid valve on the connecting pipe between the buffer tank 3 and the reaction vessel 4, so that the operator can control the connection between the reaction vessel 4 and the buffer tank 3. An inspection port is provided on the top of the reaction vessel 4. A cover 10 is installed on the flange of the inspection port. An outlet is installed on the cover 10 and connected to the inside of the reaction vessel 4. A solenoid valve is installed on the outlet, so that the operator can control the opening and closing of the outlet.

[0036] Reference Figure 1 , Figure 3 The cleaning mechanism 6 is installed on the reaction tank 4. The cleaning mechanism 6 is used to clean the carbon molecular sieve inside the reaction tank 4. The cleaning mechanism 6 includes a net bag 61, a vibration motor 62, a blowing assembly 63, and a sealing assembly 64. The net bag 61 is installed on the inner wall of the reaction tank 4. The net bag 61 is used to store the carbon molecular sieve. The net bag 61 divides the inside of the reaction tank 4 into an adsorption zone 7 and a recovery zone 8. The discharge port is connected to the adsorption zone 7. In this embodiment, a drain port connected to the adsorption zone 7 is installed on the reaction tank 4. A solenoid valve is installed on the drain port, and the drain port is connected to the drain pipe.

[0037] Reference Figure 3 , Figure 4The net 61 includes an outer frame 611, an inner frame 612, a buffer spring 613, a net body 614, and a positioning element 615. The outer frame 611 is slidably installed on the inner wall of the reaction tank 4 along the height direction. The outer frame 611 is hollow inside and open at both the top and bottom. A control component 11 is installed on the reaction tank 4. The control component 11 is used to drive the outer frame 611 to slide. In this embodiment, the control component 11 includes a control motor and a control screw. The control motor is installed on the inner wall of the reaction tank 4, and the control screw is installed on the output shaft of the control motor. The control screw is threadedly connected to the outer frame 611. When the operator starts the control motor, by switching the forward and reverse rotation of the output shaft of the control motor, the control screw can be reversed, thereby driving the outer frame 611 to move in a direction toward or away from the cover 10.

[0038] Reference Figure 3 , Figure 4 The outer frame 611 has grooves on its circumferential inner wall. The inner frame 612 is slidably installed in the grooves. The inner frame 612 is hollow inside and open at both the top and bottom. Multiple buffer springs 613 are installed circumferentially on the inner frame 612. The multiple buffer springs 613 are respectively installed circumferentially on the inner wall of the groove. The mesh body 614 is installed on the inner frame 612. The mesh body 614 forms a carrier that is hollow inside and open at the top. The carbon molecular sieve is installed inside the mesh body 614. The pore size of the mesh body 614 is smaller than the diameter of the carbon molecular sieve. The vibration motor 62 is installed at the bottom of the inner frame 612.

[0039] When the carbon molecular sieve inside the mesh 614 needs to be cleaned, the operator starts the vibration motor 62. The vibration motor 62 drives the inner frame 612 to vibrate, which in turn drives the mesh 614 to vibrate, thereby causing the carbon molecular sieve inside the mesh 614 to vibrate. Impurities adhering to the carbon molecular sieve can then pass through the pores at the bottom of the mesh 614 and fall into the recovery zone 8 under the action of vibration, thus cleaning the carbon molecular sieve and reducing the amount of impurities adhering to it. During the vibration process, the buffer spring 613 extends and retracts with the vibration of the inner frame 612, providing buffer for the inner frame 612 and reducing the vibration transmitted from the inner frame 612 to the outer frame 611, thereby reducing the vibration of the reaction vessel 4 after the vibration motor 62 is started and reducing the probability of vibration damage to the reaction vessel 4.

[0040] When the carbon molecular sieve inside the mesh 614 needs to be replaced, the staff opens the inspection port and drives the outer frame 611 to slide towards the cover 10 through the control component 11. The outer frame 611 drives the inner frame 612 and the mesh 614 to move, so that the mesh 614 can pass through the inspection port. The staff can then easily and quickly take out the carbon molecular sieve inside the mesh 614, effectively improving the convenience of replacing the carbon molecular sieve in the reaction vessel 4.

[0041] Reference Figure 3 , Figure 4 The positioning component 615 is installed on the outer frame 611. The positioning component 615 is used to position the inner frame 612 on the outer frame 611. The positioning component 615 includes a conical plug 6151 and a push rod 6152. Multiple conical plugs 6151 are slidably installed on the outer frame 611. The diameter of the conical plugs 6151 gradually decreases from the outer frame 611 to the inner frame 612. Multiple positioning holes are opened on the inner frame 612. The positioning holes are used for the conical plugs 6151 to be inserted after the vibration motor 62 stops vibrating. The push rod 6152 is installed on the outer frame 611. The push rod 6152 is used to drive the conical plugs 6151 to slide in a direction closer to or away from the positioning holes. In this embodiment, the push rod 6152 is a cylinder. The cylinder is installed on the outer frame 611, and the piston rod of the cylinder is connected to the conical plugs 6151.

[0042] When cleaning the carbon molecular sieve, the operator activates the push rod 6152, causing the conical plug 6151 to move out of the positioning hole, releasing the positioning of the inner frame 612 on the outer frame 611. The inner frame 612 can then slide on the outer frame 611. After cleaning, multiple buffer springs 613 reset, thereby driving the inner frame 612 to reset. At this time, the conical plug 6151 is aligned with the positioning hole. The operator then activates the push rod 6152 again, causing the conical plug 6151 to be inserted into the positioning hole, which can easily position the inner frame 612 on the outer frame 611, improving the stability of the inner frame 612 in the subsequent nitrogen production process.

[0043] Reference Figure 1 , Figure 3 A blower assembly 63 is installed on the reaction vessel 4. The blower assembly 63 is used to blow air onto the net bag 61. The blower assembly 63 includes an exhaust fan 631, an air duct 632, and a high-pressure nozzle 633. The air inlet of the exhaust fan 631 is connected to the buffer tank 3, and the air duct 632 is connected to the air outlet of the exhaust fan 631. In this embodiment, the air duct 632 is a corrugated hose. Multiple high-pressure nozzles 633 are circumferentially spaced on the side wall of the reaction vessel 4 near the top, and all of the multiple high-pressure nozzles 633 are connected to the air duct 632.

[0044] The staff starts the exhaust fan 631, which draws out the filtered high-pressure gas from the buffer tank 3. The high-pressure gas enters the high-pressure nozzle 633 through the air guide pipe 632 and is sprayed out. The high-pressure gas is sprayed onto the carbon molecular sieve, which blows away the impurities adhering to the carbon molecular sieve and improves the cleaning effect of the carbon molecular sieve.

[0045] Reference Figure 3A sealing assembly 64 is installed on the reaction vessel 4. The sealing assembly 64 is used to seal the bottom opening of the inner frame 612. The sealing assembly 64 includes a support frame 641, a sealing plate 642, a sealing strip 643, and a drive motor 644. The support frame 641 is hollow inside and open at both the top and bottom. The support frame 641 is circumferentially installed on the inner wall of the reaction vessel 4. The bottom of the outer frame 611 abuts against the support frame 641. The sealing plate 642 is hinged to the bottom wall of the support frame 641. The sealing plate 642 is used to seal the opening of the support frame 641. The sealing strip 643 is circumferentially installed on the side of the sealing plate 642 facing the support frame 641. The drive motor 644 is installed on the support frame 641. The output shaft of the drive motor 644 is coaxially connected to the hinge shaft of the sealing plate 642.

[0046] When cleaning the carbon molecular sieve, the operator controls the drive motor 644 to start, which drives the sealing plate 642 to rotate away from the support frame 641, opening the opening of the support frame 641 to allow impurities adhering to the carbon molecular sieve to pass through. After cleaning, the operator controls the drive motor 644 to rotate the sealing plate 642 towards the support frame 641, so that the sealing strip 643 on the sealing plate 642 presses against the support frame 641, thus sealing the opening of the support frame 641 and separating the adsorption zone 7 from the recovery zone 8, thereby improving the sealing performance of the adsorption zone 7.

[0047] Reference Figure 3 A positioning component 9 is installed on the support frame 641. The positioning component 9 is used to position the closing plate 642 on the support frame 641. The positioning component 9 includes a positioning block 91 and a positioning cylinder 92. The positioning block 91 is slidably installed on the bottom wall of the support frame 641. The positioning block 91 has an opening on one side facing the closing plate 642. The opening diameter of the positioning block 91 gradually decreases from the direction close to the closing plate 642 to the direction away from the closing plate 642. The positioning cylinder 92 is installed on the support frame 641 along the sliding direction of the positioning block 91. The piston rod of the positioning cylinder 92 is connected to the positioning block 91.

[0048] After the sealing plate 642 rotates to close the opening of the support frame 641, the piston rod of the positioning cylinder 92 extends, causing the positioning block 91 to move toward the sealing plate 642. During the movement of the positioning block 91, the side wall on the opening side squeezes the sealing plate 642, causing the sealing plate 642 to continue moving toward the support frame 641. The sealing plate 642 presses the sealing strip 643 onto the support frame 641, effectively improving the isolation effect of the sealing plate 642 between the adsorption area 7 and the sealing area.

[0049] Reference Figure 1 A nitrogen production process includes the following steps: S1: Air compressor 1 compresses air into compressed gas, and purification unit 2 filters the compressed gas; S2: The filtered compressed gas enters one of the reaction tanks 4, and the other reaction tank 4 discharges the adsorbed gas. At the same time, the cleaning mechanism 6 cleans the impurities on the carbon molecular sieve in the adsorption zone 7 of the reaction tank 4 to the recovery zone 8. S3: The nitrogen gas separated in reaction vessel 4 enters storage tank 5 for storage; S4: Nitrogen gas is pressurized by a booster 12 connected to the gas storage tank 5, and then the high-pressure nitrogen gas is converted into liquid nitrogen by a liquid nitrogen generator 13; S5: The filtered compressed gas is introduced into another cleaned reaction tank 4 to discharge the gas adsorbed by the previous reaction tank 4 and clean the previous reaction tank 4. This process is repeated to continuously produce nitrogen efficiently.

[0050] The implementation principle of a nitrogen generation equipment system and its process flow in this application embodiment is as follows: Air compressor 1 compresses air into compressed gas. The compressed gas is sequentially passed through oil separator 21, precision filter 22, dryer 23, dust filter 24, and activated carbon filter 25 for filtration. The filtered compressed gas enters buffer tank 3 to alleviate pressure fluctuations. Then, one reaction tank 4 is connected to buffer tank 3, and the connection between the other reaction tank 4 and the other reaction tank 4 is disconnected. The compressed gas is then introduced into one of the reaction tanks 4. The carbon molecular sieve in mesh 614 adsorbs oxygen and impurities in the compressed air, thereby separating nitrogen from the compressed gas. The separated nitrogen is introduced into storage tank 5, and then pressurized by booster compressor 12 and output as liquid nitrogen by liquid nitrogen generator 13. During the nitrogen generation process, the outlet of the other reaction tank 4 is opened, allowing the gas adsorbed by the carbon molecular sieve to be released. The gas is discharged, and then the sealing plate 642 is opened to connect the adsorption zone 7 and the recovery zone 8. The exhaust fan 631 and the vibration motor 62 are started to clean the impurities adhering to the carbon molecular sieve into the recovery zone 8. Then the sealing plate 642 is closed, and the reaction tank 4 after cleaning the carbon molecular sieve is connected to the buffer tank 3. The connection between the previous nitrogen-producing reaction tank 4 and the buffer tank 3 is disconnected, and the previous nitrogen-producing reaction tank 4 is vented and cleaned. This cycle is repeated to continuously produce liquid nitrogen. The purification mechanism 2 reduces the impurity content of the compressed gas introduced into the reaction tank 4, thereby reducing the amount of impurities adhering to the carbon molecular sieve in the reaction tank 4. At the same time, the cleaning mechanism 6 cleans the impurities on the carbon molecular sieve, improving the recovery effect of the carbon molecular sieve in the reaction tank 4. This ensures that the carbon molecular sieve maintains a good adsorption effect each time it adsorbs, improving nitrogen production efficiency and quality.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nitrogen generation equipment system, characterized in that: The system includes an air compressor (1), a purification mechanism (2), a buffer tank (3), a reaction tank (4), a gas storage tank (5), and a cleaning mechanism (6). The purification mechanism (2) is connected to the air compressor (1) and is used to filter impurities in the compressed gas produced by the air compressor (1). The buffer tank (3) is connected to the purification mechanism (2). At least two reaction tanks (4) are connected to the buffer tank (3). The reaction tank (4) is divided into an adsorption zone (7) and a recovery zone (8). The adsorption zone (7) is filled with carbon molecular sieves. The reaction tank (4) is connected to the adsorption zone (7) and has an outlet. The gas storage tank (5) is connected to the adsorption zone (7) of the two reaction tanks (4). The cleaning mechanism (6) includes a net bag (61), a vibration motor (62), a blowing assembly (63), and a sealing assembly (64). The net bag (61) is disposed on the inner wall of the reaction tank (4) and divides the interior of the reaction tank (4) into an adsorption zone (7) and a recovery zone (8). The vibration motor (62) is disposed on the net bag (61). The blowing assembly (63) is disposed on the reaction tank (4) and is used to blow air onto the net bag (61). The sealing assembly (64) is disposed on the reaction tank (4) and is used to seal the bottom of the net bag (61). The net bag (61) includes an outer frame (611), an inner frame (612), a buffer spring (613), a net body (614), and a positioning element (615). The outer frame (611) is circumferentially arranged on the inner wall of the reaction tank (4). The inner frame (612) is slidably arranged on the outer frame (611). The inner wall of the outer frame (611) is provided with a sliding groove. The inner frame (612) is slidably installed in the sliding groove. The vibration motor (62) is arranged on the inner frame (612). The buffer spring (613) is circumferentially spaced on the inner frame (612). The buffer spring (613) is connected to the outer frame (611). The net body (614) is arranged on the inner frame (612) to form a carrier that is hollow inside and open at the top. The positioning element (615) is arranged on the outer frame (611) and is used to position the inner frame (612) on the outer frame (611). The sealing assembly (64) includes a support frame (641), a sealing plate (642), a sealing strip (643), and a drive motor (644). The support frame (641) is circumferentially disposed on the inner wall of the reaction vessel (4). The mesh bag (61) abuts against the support frame (641). The sealing plate (642) is hinged to the support frame (641). The sealing strip (643) is circumferentially disposed on the sealing plate (642). The drive motor (644) is disposed on the support frame (641) and coaxially connected to the hinge axis of the sealing plate (642). The blowing assembly (63) includes an exhaust fan (631), an air duct (632), and a high-pressure nozzle (633). The exhaust fan (631) is connected to the buffer tank (3), the air duct (632) is connected to the exhaust fan (631), and the high-pressure nozzle (633) is located on the reaction tank (4) and connected to the exhaust fan (631).

2. The nitrogen generation equipment system according to claim 1, characterized in that: The purification mechanism (2) includes an oil remover (21), a precision filter (22), a dryer (23), a dust filter (24), and an activated carbon filter (25). The oil remover (21) is connected to the air compressor (1), the precision filter (22) is connected to the oil remover (21), the dryer (23) is connected to the precision filter (22), the dust filter (24) is connected to the dryer (23), and the activated carbon filter (25) is connected to the dust filter (24) and connected to the reaction tank (4).

3. The nitrogen generation equipment system according to claim 1, characterized in that: The positioning component (615) includes a tapered plug (6151) and a push rod (6152). Multiple tapered plugs (6151) are slidably arranged on the outer frame (611). Multiple positioning holes are provided on the inner frame (612) for inserting the tapered plugs (6151) after the vibration motor (62) stops vibrating. The push rod (6152) is arranged on the outer frame (611) and is used to drive the tapered plugs (6151) to slide.

4. A nitrogen generation equipment system according to claim 1, characterized in that: The support frame (641) is provided with a positioning component (9) for positioning the closing plate (642) on the support frame (641). The positioning component (9) includes a positioning block (91) and a positioning cylinder (92). The positioning block (91) is slidably disposed on the support frame (641). The positioning block (91) is open on one side facing the closing plate (642). The opening of the positioning block (91) gradually decreases from the direction close to the closing plate (642) to the direction away from the closing plate (642). The positioning cylinder (92) is disposed on the support frame (641) and connected to the positioning block (91).

5. A nitrogen generation equipment system according to claim 1, characterized in that: The top of the reaction vessel (4) is provided with an inspection port, and the flange of the inspection port is provided with a cover (10). The outer frame (611) is slidably disposed on the inner wall of the reaction vessel (4) along the height direction of the reaction vessel (4). The reaction vessel (4) is provided with a control component (11) for driving the outer frame (611) to slide.

6. A nitrogen generation process flow applied to the nitrogen generation equipment system according to any one of claims 1-5, characterized in that: Includes the following steps: S1: The air compressor (1) compresses air into compressed gas, and the purification mechanism (2) filters the compressed gas; S2: The filtered compressed gas enters one of the reaction tanks (4), and the other reaction tank (4) discharges the adsorbed gas. At the same time, the cleaning mechanism (6) cleans the impurities on the carbon molecular sieve in the adsorption zone (7) of the reaction tank (4) to the recovery zone (8). S3: The nitrogen gas separated in the reaction vessel (4) is stored in the gas storage tank (5); S4: Nitrogen gas is pressurized by a booster (12) connected to a gas storage tank (5), and then the high-pressure nitrogen gas is converted into liquid nitrogen by a liquid nitrogen generator (13); S5: The filtered compressed gas is introduced into another cleaned reaction tank (4) to discharge the gas adsorbed by the previous reaction tank (4) and clean the previous reaction tank (4). This process is repeated to continuously produce nitrogen efficiently.

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