Energy-saving nitrogen production equipment and method with pressure swing adsorption function

Abstract

The application discloses an energy-saving nitrogen production equipment and method with pressure swing adsorption function, and relates to the technical field of nitrogen production. The application comprises a nitrogen production tank, further comprises a partition disc and a top sealing disc fixedly installed in the nitrogen production tank, and a partition plate fixedly installed between the partition disc and the top sealing disc for partitioning the nitrogen production tank into a first nitrogen production area and a second nitrogen production area; the first nitrogen production area and the second nitrogen production area are both provided with a nitrogen production assembly; a pressure swing adsorption unit comprises a gas guiding assembly and a pressure increasing assembly; and an equalizing desorption unit comprises a gas storage assembly and a stamping assembly. The application has the advantages that the alternate operation of the first nitrogen production area and the second nitrogen production area can effectively improve the production capacity, the gas flow direction can be flexibly controlled during the nitrogen production, the oxygen and nitrogen separation effect is enhanced by self-pressurization, the gas production efficiency is improved, the residual pressure energy can be recycled and utilized to realize the equalization of the pressure of the first nitrogen production area and the second nitrogen production area, the discharge of the oxygen-rich tail gas is accelerated in the pressure relief stage, the operation energy consumption is effectively reduced, and the energy-saving effect is remarkable.

Description

Technical Field

[0001] This invention relates to the technical field of nitrogen production, and in particular to an energy-saving nitrogen production device and method with pressure swing adsorption (PSA) function. Background Technology

[0002] Nitrogen is a colorless, odorless, and chemically stable inert gas with excellent properties such as flame retardancy, corrosion prevention, oxidation prevention, and inert protection. It is one of the most widely used basic gas sources in industrial production. Existing factories usually use nitrogen generation equipment to produce nitrogen, and the nitrogen generation process uses compressed air as raw material, which does not produce harmful gases or waste, thus falling under the field of environmental protection engineering construction.

[0003] Existing nitrogen generation equipment employs various methods to produce nitrogen, such as a novel nitrogen generation tower disclosed in CN218249399U, which includes an outer tower. The bottom of the outer tower is connected to an inlet pipe, which extends upward to the interior of the outer tower and communicates with an inner tower. The inner tower is mounted on top of a filter cartridge, and the bottom of the filter cartridge is connected to the inner bottom wall of the outer tower. One end of the filter cartridge is connected to an outlet pipe, and the other end of the outlet pipe extends out of the interior of the outer tower.

[0004] Existing nitrogen generation equipment typically produces nitrogen through pressure swing adsorption of molecular sieves in a nitrogen generation tower. However, the internal volume of the nitrogen generation tower is fixed, and the adsorption pressure is increased by simply pressurizing the inlet gas. It is impossible to dynamically adjust the adsorption chamber volume according to the operating conditions, resulting in low nitrogen generation efficiency. For example, in the aforementioned prior art, the nitrogen generator uses a fixed-volume inner tower and an outer tower to produce nitrogen. The internal pressure of the nitrogen generator cannot be controlled in real time, resulting in high ineffective energy consumption at low pressure. Furthermore, it cannot recover and reuse residual pressure. During nitrogen production, the gases of different regions and purities within the tower are not graded and recovered, leading to a significant waste of effective gas and pressure energy, which has certain limitations. Therefore, there is an urgent need to design an energy-saving nitrogen generation device and method with pressure swing adsorption (PSA) function to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an energy-saving nitrogen generation device and method with pressure swing adsorption (PSA) function, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving nitrogen generator with pressure swing adsorption (PSA) function, comprising a nitrogen generator tank, and further comprising: A partition plate and a top plate are fixedly installed inside the nitrogen generator, and a partition plate for dividing the inside of the nitrogen generator into nitrogen generation zone one and nitrogen generation zone two is fixedly installed between the partition plate and the top plate. The nitrogen generator is equipped with an air injection component for introducing compressed air into nitrogen generation zone one and nitrogen generation zone two. Nitrogen generation units are installed in both nitrogen generation zone one and nitrogen generation zone two, and each nitrogen generation unit is equipped with a molecular sieve box for adsorbing oxygen and permeating nitrogen. The pressure swing adsorption unit is installed inside the nitrogen generator and includes a gas guiding component and a pressurization component. The gas guiding component is equipped with a nitrogen exhaust pipe for discharging pure nitrogen gas, and the pressurization component is equipped with two elastic pressurization sleeves for adjusting the internal pressure of nitrogen generation zone one and nitrogen generation zone two. The pressure equalization and desorption unit installed in the nitrogen generator includes a gas storage component and a stamping component. The gas storage component is equipped with a gas storage box for storing air in the elastic pressurization sleeve, and the stamping component is equipped with a pressure equalization box for achieving pressure equalization between nitrogen generation zone one and nitrogen generation zone two.

[0007] Preferably, the nitrogen generator is equipped with an intelligent control unit on its side. The intelligent control unit is used to control the operation and on / off status of the nitrogen assembly, pressure swing adsorption unit, and pressure equalization desorption unit, so as to achieve energy-saving and efficient nitrogen production.

[0008] Preferably, the air injection assembly includes an air inlet cylinder for conveying compressed air, and a filter disc and an activated carbon adsorption plate are fixedly installed inside the air inlet cylinder, wherein the filter disc is used to filter impurities in the compressed air, and the activated carbon adsorption plate is used to adsorb water vapor in the compressed air. The nitrogen generator is fixedly connected to an air inlet pipe 1 and an air inlet pipe 2, and the gas injection ends of the air inlet pipe 1 and the air inlet pipe 2 are located in nitrogen generation zone 1 and nitrogen generation zone 2, respectively. Both the air inlet pipe 1 and the air inlet pipe 2 are connected to the air inlet cylinder.

[0009] Preferably, the nitrogen generation assembly includes two support frames fixedly installed on the side of the partition plate, and the molecular sieve box is vertically slidably installed between the two support frames. The upper and lower parts of the molecular sieve box are fixedly installed with shock-absorbing springs between them and the two support frames to buffer its vibration. A flow guiding mechanism is installed between the two support frames.

[0010] Preferably, the flow guiding mechanism includes a flow guiding plate fixedly installed between two support frames, and the flow guiding plate is located at the lower part of the molecular sieve box. Multiple staggered flow guiding plates 1 and 2 for conducting compressed air are fixedly installed inside the flow guiding plate, and each flow guiding plate 1 has multiple flow guiding straight holes, and each flow guiding plate 2 has multiple flow guiding spiral holes. The lower part of the guide plate is provided with a support groove, and a synchronizing rod is slidably installed in the support groove. Multiple shielding plates for selectively shielding the first or second guide plate are fixedly installed on the synchronizing rod. An electromagnetic plate is fixedly installed on the synchronizing rod. An electromagnetic plate 2 that cooperates with the electromagnetic plate 1 is fixedly installed on the inner wall of the support groove. A reset spring rod for resetting is fixedly installed between the electromagnetic plate 1 and the inner wall of the support groove.

[0011] Preferably, the gas guiding assembly includes two nitrogen gas conduits for outputting nitrogen gas, which are fixedly connected to the upper part of the capping plate, and the two nitrogen gas conduits are respectively connected to nitrogen generation zone one and nitrogen generation zone two, and the nitrogen gas exhaust pipe is fixedly connected between the two nitrogen gas conduits. An air blasting box is fixedly installed on the top plate. A linkage roller is rotatably installed between the air blasting box and the nitrogen exhaust pipe. Multiple fan impellers are fixedly installed on the linkage roller, and all the fan impellers are located inside the nitrogen exhaust pipe.

[0012] Preferably, the pressurization assembly includes a cylindrical cam fixedly mounted on the linkage roller, an air suction plate for adsorbing air is slidably mounted inside the air box, a pusher is fixedly mounted on the air suction plate, and a spiral cam groove that cooperates with the pusher is provided on the cylindrical cam. The two elastic booster sleeves are respectively fixedly installed on both sides of the partition plate. An air supply pipe for air intake is fixedly connected to the air box. An air guide pipe for exhaust is fixedly connected to the lower part of the air box. An air injection pipe for air filling is fixedly installed between the air guide pipe and the two elastic booster sleeves.

[0013] Preferably, the gas storage assembly includes a gas storage box fixedly installed inside the nitrogen generator, and the gas storage box is located below the partition plate. Both of the two elastic pressure-boosting sleeves are fixedly connected to the gas storage box by a gas extraction pipe for venting.

[0014] Preferably, the stamping assembly includes a return gas plate slidably installed in the gas storage tank, and a plurality of lifting spring rods for lifting and resetting are fixedly installed between the return gas plate and the bottom of the gas storage tank. Two gas filling boxes for filling are fixedly connected between the gas storage tank and the partition plate, and the two gas filling boxes are respectively located in nitrogen generation zone one and nitrogen generation zone two. The pressure equalization box is fixedly installed on the partition plate and is located above the two molecular sieve boxes. Two waste oxygen discharge pipes for discharging oxygen-enriched tail gas are fixedly connected to the nitrogen generation tank, and the two waste oxygen discharge pipes are respectively located in nitrogen generation zone one and nitrogen generation zone two.

[0015] An energy-saving nitrogen generation method with pressure swing adsorption (PSA) function, used in the aforementioned energy-saving nitrogen generation equipment, includes the following steps: S1. Compressed air is injected into nitrogen generation zone one through the air injection component, so that the internal pressure of nitrogen generation zone one gradually increases; S2. The compressed air in nitrogen generation zone 1 comes into contact with the molecular sieve box in the nitrogen generation component under high pressure. The molecular sieve box will adsorb the oxygen in the compressed air, and the pure nitrogen will pass through the molecular sieve box and then be discharged through the nitrogen exhaust pipe in the gas delivery component. S3. When nitrogen is emitted, the booster assembly is driven to fill the elastic booster sleeve with external air, causing it to expand, reducing the volume of nitrogen generation zone 1, increasing the internal pressure, and enhancing the oxygen and nitrogen adsorption and separation effect. S4. After nitrogen generation in nitrogen generation zone one is completed, open the equalizing box in the stamping assembly to allow the remaining high-pressure nitrogen in nitrogen generation zone one to enter nitrogen generation zone two, thereby equalizing the internal pressure of nitrogen generation zone one and nitrogen generation zone two. S5. By adsorbing air from inside the elastic pressurizing sleeve through the gas storage box, the internal volume of the nitrogen generation zone is increased and the pressure is reduced. After the pressure is reduced, the oxygen adsorbed in the molecular sieve box is automatically desorbed. S6. The air in the gas storage tank is released by the stamping component, which impacts the oxygen-rich tail gas inside the nitrogen generation zone and causes it to be quickly discharged from the nitrogen generation zone. S7. While nitrogen generation zone one completes the desorption operation, compressed air is introduced into nitrogen generation zone two to repeat the nitrogen generation process of S1-S6, so as to realize the alternating nitrogen generation of nitrogen generation zone one and nitrogen generation zone two.

[0016] This invention provides an energy-saving nitrogen generation device and method with pressure swing adsorption (PSA) function. It has the following beneficial effects: 1. When preparing nitrogen, this nitrogen generator uses a filter disc and activated carbon adsorption plate inside the air inlet to filter out solid impurities and water vapor in the compressed air step by step. This effectively prevents pollutants from entering the molecular sieve box and causing the adsorption medium to degrade. It ensures the quality of the incoming air from the source and improves the purity of the finished nitrogen product.

[0017] 2. When preparing nitrogen, this nitrogen generator separates nitrogen and oxygen through a molecular sieve box, achieving efficient nitrogen production. At the same time, the combination of guide plate one and guide plate two allows for flexible adjustment of the airflow path according to the internal pressure, improving the internal flow field of the nitrogen generation zone and eliminating airflow deviation and crossflow problems. Meanwhile, the shock-absorbing springs buffer the operating vibration of the molecular sieve box, reducing wear and effectively extending its service life.

[0018] 3. When preparing nitrogen, this nitrogen generator can use the impact of nitrogen emission to purge the elastic pressure jacket, and dynamically change the internal volume of the nitrogen generation zone by means of the elastic pressure jacket. In turn, the internal pressure is increased by reducing the volume of the nitrogen generation zone, which can further enhance the oxygen absorption effect of the molecular sieve box and effectively improve the oxygen-nitrogen separation efficiency and unit gas production capacity.

[0019] 4. When this nitrogen generator produces nitrogen, after nitrogen production is completed in nitrogen production zone one, the remaining high-pressure gas in nitrogen production zone one is introduced into nitrogen production zone two through the equalization box to complete the equalization. This can make full use of the pressure energy of the remaining gas, reduce the energy loss caused by direct venting of high-pressure gas, and use the airflow generated when the elastic pressure booster sleeve releases pressure to impact the oxygen-rich tail gas, thereby increasing its emission speed. The energy-saving effect is significant, and the nitrogen production efficiency is further improved.

[0020] In summary, the alternating operation of nitrogen production zone one and nitrogen production zone two in this invention can effectively increase production capacity, and the airflow direction can be flexibly controlled during nitrogen production. At the same time, the autonomous pressurization enhances the oxygen-nitrogen separation effect and improves gas production efficiency. Meanwhile, residual pressure energy can be recovered and utilized to achieve pressure equalization between nitrogen production zone one and nitrogen production zone two. During the depressurization stage, the emission of oxygen-enriched tail gas is accelerated, effectively reducing operating energy consumption and achieving significant energy-saving effects.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of an energy-saving nitrogen generator with pressure swing adsorption function proposed in this invention; Figure 2 for Figure 1 A schematic diagram of the nitrogen generator after removing the support legs; Figure 3 for Figure 2 Schematic diagram of the internal structure of the nitrogen generator; Figure 4 for Figure 3 The front view; Figure 5 for Figure 3 A schematic diagram of the structure after removing the nitrogen generator; Figure 6 for Figure 5 Schematic diagram of the upper structure of the middle partition plate, partition plate, and capping plate; Figure 7 for Figure 6 Schematic diagram of the structure of the medium molecular sieve box; Figure 8 for Figure 7 Schematic diagram of the structure of the central guide plate; Figure 9 for Figure 8 A schematic diagram of the structure after rotation at a certain angle; Figure 10 for Figure 9 A structural decomposition diagram; Figure 11 for Figure 10 Enlarged view of the structure at part A in the middle; Figure 12 for Figure 11 Schematic diagram of the structure of the middle blower and the air storage tank; Figure 13 for Figure 12Schematic diagram of the structure of the middle blower and nitrogen pipe; Figure 14 for Figure 13 Schematic diagram of the internal structure of the middle blower and nitrogen pipe; Figure 15 for Figure 12 A schematic diagram of the structure of the central air storage box and the elastic pressure booster sleeve; Figure 16 for Figure 15 A schematic diagram of the internal structure of the gas storage box.

[0023] In the diagram: 1. Nitrogen generator, 2. Return gas plate, 3. Inlet cylinder, 4. Inlet pipe 1, 5. Inlet pipe 2, 6. Intelligent control unit, 7. Blower box, 8. Nitrogen manifold, 9. Injection pipe, 10. Guide pipe, 11. Divider plate, 12. Divider plate, 13. Top plate, 14. Waste oxygen manifold, 15. Molecular sieve box, 16. Gas storage box, 17. Elastic pressure boosting sleeve, 18. Nitrogen conduit, 19. Guide plate, 20. Pressure equalization box, 21. Support frame, 22. Shock absorber spring, 23. Guide plate 1, 24. Guide plate 2, 25. Baffle plate, 26. Lifting spring rod, 27. Synchronizing rod, 28. Reset spring rod, 29. Electromagnetic plate 1, 30. Electromagnetic plate 2, 31. Air inlet box, 32. Extraction pipe, 33. Make-up pipe, 34. Linkage roller, 35. Suction plate, 36. Fan impeller, 37. Cylindrical cam, 38. Pushing frame, 39. Spiral cam groove. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Example 1: Refer to Figures 1-4 An energy-saving nitrogen generator with pressure swing adsorption function includes a nitrogen generator tank 1. The lower part of the nitrogen generator tank 1 is provided with support legs, which provide stable support for the nitrogen generator tank 1 and improve the stability of the nitrogen generation process.

[0026] This nitrogen generator also includes: A partition plate 11 and a top plate 13 are fixedly installed inside the nitrogen generator 1, and a partition plate 12 for dividing the interior of the nitrogen generator 1 into nitrogen generation zone one and nitrogen generation zone two is fixedly installed between the partition plate 11 and the top plate 13. The area between the partition plate 11 and the top plate 13 inside the nitrogen generator 1 is the nitrogen preparation area. The partition plate 12 is vertically set between the partition plate 11 and the top plate 13, dividing the nitrogen preparation area into two identical nitrogen preparation spaces on the left and right. The nitrogen preparation space on the left is named nitrogen preparation area one, and the nitrogen preparation space on the right is named nitrogen preparation area two.

[0027] The nitrogen generator 1 is equipped with an air injection assembly for introducing compressed air into nitrogen generation zone 1 and nitrogen generation zone 2; The air injection assembly includes an air inlet cylinder 3 for conveying compressed air, and a filter disc and an activated carbon adsorption plate are fixedly installed inside the air inlet cylinder 3. The filter disc is used to filter impurities in the compressed air, and the activated carbon adsorption plate is used to adsorb water vapor in the compressed air. An external air compressor delivers compressed air to the intake cylinder 3. As the compressed air is delivered into the intake cylinder 3, it comes into contact with the filter disc and the activated carbon adsorption plate in sequence. At this time, the filter disc removes impurities from the compressed air, and the activated carbon adsorption plate removes water vapor and fine impurities from the compressed air, thus achieving multi-stage purification of the compressed air. This prevents pollutants from entering the nitrogen generator 1 and causing the adsorption medium to degrade, ensuring the quality of the intake air from the source and improving the purity of the finished nitrogen product.

[0028] The nitrogen generator 1 is fixedly connected to an air inlet pipe 4 and an air inlet pipe 5, and the gas injection ends of the air inlet pipe 4 and the air inlet pipe 5 are located in the nitrogen generation zone 1 and the nitrogen generation zone 2, respectively. Both the air inlet pipe 4 and the air inlet pipe 5 are connected to the air inlet cylinder 3. Compressed air in the air inlet cylinder 3 is transported to nitrogen generation zone 1 and nitrogen generation zone 2 in nitrogen generation tank 1 through air inlet pipe 1 4 and air inlet pipe 2 5. When air is supplied through air inlet pipe 1 4, air inlet pipe 2 5 is in a closed state, and when air is supplied through air inlet pipe 2 5, air inlet pipe 1 4 is in a closed state, so as to realize independent nitrogen generation operation in nitrogen generation zone 1 and nitrogen generation zone 2.

[0029] The pressure swing adsorption unit is installed inside the nitrogen generator 1. The pressure swing adsorption unit is used to dynamically adjust the internal pressure of the chamber according to the operating status of the compressed air in nitrogen generator zone 1 or nitrogen generator zone 2. By increasing the adsorption working pressure through volume change, the oxygen-nitrogen separation effect is enhanced, the gas production efficiency is effectively improved, and the internal airflow pattern is optimized to ensure smooth airflow, reduce operating losses, and make the adsorption separation process more stable and efficient.

[0030] The pressure equalization and desorption unit installed in nitrogen generator 1 is used to achieve pressure balance between nitrogen generation zone 1 and nitrogen generation zone 2, fully recover and utilize residual pressure energy, reduce energy waste, and at the same time, it can quickly guide the waste gas during the desorption stage, accelerate the regeneration speed of the adsorption medium, ensure the continuous operation of the equipment, and achieve outstanding overall energy-saving effect.

[0031] The side of the nitrogen generator 1 is equipped with an intelligent control host 6, which is used to control the operation and on / off status of the nitrogen assembly, pressure swing adsorption unit, and pressure equalization desorption unit, so as to achieve energy-saving and efficient nitrogen production.

[0032] Example 2: Refer to Figures 3-11 The technical solution that differs from that of Embodiment 1 is that nitrogen generation components are provided in both nitrogen generation zone 1 and nitrogen generation zone 2, and molecular sieve boxes 15 for adsorbing oxygen and permeating nitrogen are provided in the nitrogen generation components. The nitrogen generation assembly includes two support frames 21 fixedly installed on the side of the partition plate 12, and the molecular sieve box 15 is vertically slidably installed between the two support frames 21. The upper and lower parts of the molecular sieve box 15 are fixedly installed with shock-absorbing springs 22 to buffer its vibration between the two support frames 21. The shock-absorbing springs 22 installed at the top and bottom of the molecular sieve box 15 are used to dampen and buffer the molecular sieve box 15, thereby preventing the molecular sieve box 15 from vibrating under the action of airflow scouring and pressure fluctuation. The shock-absorbing springs 22 arranged at the top and bottom provide all-round buffering of vibration and reduction of impact on the molecular sieve box 15, avoid the components from colliding and wearing each other, ensure the stability of the working posture of the molecular sieve box 15, and improve the reliability of equipment operation.

[0033] After entering the nitrogen generation zone 1, the compressed air will be located at the lower part of the molecular sieve box 15. As the compressed air is continuously injected, the internal pressure of the nitrogen generation zone 1 will continuously increase. Under the action of pressure, the compressed air will flow upward and pass through the molecular sieve box 15. At this time, the oxygen in the compressed air is adsorbed by the medium in the molecular sieve box 15, causing it to separate from the nitrogen. After separation, the nitrogen will pass through the molecular sieve box 15 into its upper part and finally be discharged directly to the outside.

[0034] In a further embodiment, a flow guiding mechanism is installed between the two support frames 21. The flow guiding mechanism includes a flow guiding plate 19 fixedly installed between the two support frames 21, and the flow guiding plate 19 is located at the lower part of the molecular sieve box 15. Multiple staggered flow guiding plates 23 and 24 for conducting compressed air are fixedly installed inside the flow guiding plate 19. Each guide plate 23 has multiple straight guide holes, which form a straight airflow channel, effectively reducing the gas flow resistance and ensuring smooth airflow under high flow rate and high velocity conditions, avoiding pressure loss. This is suitable for the gas delivery requirements of the high-pressure adsorption stage, that is, opening multiple guide plates 23 during high-pressure adsorption to efficiently prepare nitrogen.

[0035] Each guide plate 24 has multiple guide spiral holes. When the airflow passes through the guide spiral holes, the flow direction will change under the action of the spiral, forming a turbulent vortex, allowing the gas to fully contact the molecular sieve, eliminating dead angles in the flow field, improving the uniformity of oxygen and nitrogen adsorption and separation, and at the same time reducing airflow impact, reducing media wear, and enhancing the exhaust gas purging and desorption effect. That is, during low-pressure desorption, multiple guide plates 24 are opened to carry out the oxygen-enriched tail gas purging and emission process.

[0036] The lower part of the guide plate 19 is provided with a support groove, and a synchronizing rod 27 is slidably installed in the support groove. Multiple baffles 25 for selectively blocking the first guide plate 23 or the second guide plate 24 are fixedly installed on the synchronizing rod 27. An electromagnetic plate 29 is fixedly installed on the synchronizing rod 27. An electromagnetic plate 30 that cooperates with the electromagnetic plate 29 is fixedly installed on the inner wall of the support groove. A reset spring rod 28 for resetting is fixedly installed between the electromagnetic plate 29 and the inner wall of the support groove. In the initial state, multiple baffles 25 block multiple guide plates 24. At this time, the guide holes on multiple guide plates 23 are all connected, which improves the adsorption efficiency of compressed air in the high-pressure adsorption stage. During oxygen desorption, electromagnetic plate 29 and electromagnetic plate 30 are activated, generating an electromagnetic attraction force between them. Electromagnetic plate 29 slides towards electromagnetic plate 30 under the magnetic attraction, thereby driving synchronous rod 27 to slide within the support groove. When synchronous rod 27 slides, it drives multiple baffle plates 25 to slide, causing the baffle plates 25 to slide from the lower part of guide plate 24 to the lower part of guide plate 23, thereby releasing the obstruction of multiple guide plates 24 and obstructing multiple guide plates 23. At this time, the guide spiral holes on multiple guide plates 24 will be in a connected state, increasing the purging and emission efficiency of oxygen-enriched exhaust gas.

[0037] When the synchronizing rod 27 moves, it will stretch the reset spring rod 28. After the oxygen-enriched exhaust gas is discharged, the electromagnetic plate 1 29 and electromagnetic plate 2 30 are de-energized. The reset spring rod 28 will automatically retract and pull the synchronizing rod 27 and multiple baffle plates 25 to reset, and then baffle multiple guide plates 24 again, so that nitrogen adsorption preparation can be carried out again.

[0038] Example 3: Refer to Figures 3-6 as well as Figures 12-14 The technical difference between this embodiment and embodiment two is that the pressure swing adsorption unit includes a gas guiding component and a pressurizing component. The gas guiding component is provided with a nitrogen exhaust pipe 8 for discharging pure nitrogen gas, and the pressurizing component is provided with two elastic pressurizing sleeves 17 for adjusting the internal pressure of nitrogen generation zone one and nitrogen generation zone two. The gas guiding assembly includes two nitrogen gas conduits 18 fixedly connected to the upper part of the capping plate 13 for outputting nitrogen gas, and the two nitrogen gas conduits 18 are respectively connected to nitrogen generation zone one and nitrogen generation zone two, and the nitrogen gas discharge pipe 8 is fixedly connected between the two nitrogen gas conduits 18. The pure nitrogen gas after passing through the molecular sieve box 15 will be located between the molecular sieve box 15 and the capping plate 13. For ease of explanation, this area in nitrogen production zone one will be named temporary storage zone one, and this area in nitrogen production zone two will be named temporary storage zone two. The same applies to the following descriptions.

[0039] Nitrogen gas in the temporary storage area will enter the nitrogen conduit 18 and be discharged directly through the nitrogen exhaust pipe 8, thereby completing the collection of pure nitrogen gas.

[0040] An air blasting box 7 is fixedly installed on the top plate 13. A linkage roller 34 is rotatably installed between the air blasting box 7 and the nitrogen pipe 8. Multiple fan impellers 36 are fixedly installed on the linkage roller 34, and all the fan impellers 36 are located inside the nitrogen pipe 8. When nitrogen flows in the nitrogen pipe 8, it impacts multiple impellers 36 inside. The impellers 36 rotate under the action of the airflow, which in turn drives the linkage roller 34 to rotate synchronously, thus converting the impact kinetic energy of the nitrogen flow into the rotational potential energy of the linkage roller 34.

[0041] In a further embodiment, the pressurization assembly includes a cylindrical cam 37 fixedly mounted on the linkage roller 34, an air suction plate 35 for adsorbing air is slidably mounted in the air box 7, a pusher 38 is fixedly mounted on the air suction plate 35, and a spiral cam groove 39 that cooperates with the pusher 38 is provided on the cylindrical cam 37. When the linkage roller 34 rotates, it will drive the cylindrical cam 37 to rotate inside the air box 7. When the cylindrical cam 37 rotates, it will drive the spiral cam groove 39 on it to rotate. During the rotation of the cylindrical cam 37, the groove wall of the spiral cam groove 39 continuously squeezes the mating end of the pusher frame 38, so that under the guidance of the spiral groove trajectory, it drives the pusher frame 38 to move forward in a straight line. When the trajectory on the spiral cam groove 39 switches to the reverse spiral segment, the groove wall on the other side of the spiral cam groove 39 will push the pusher 38 in the opposite direction, thereby pulling the pusher 38 to move backward and reset. The continuous rotation of the spiral cam groove 39 drives the pusher 38 to move back and forth, thereby driving the suction plate 35 to move back and forth in the air box 7.

[0042] Two elastic booster sleeves 17 are fixedly installed on both sides of the partition plate 12. An air supply pipe 33 for air intake is fixedly connected to the air box 7. An air guide pipe 10 for exhaust is fixedly connected to the lower part of the air box 7. An air injection pipe 9 for air filling is fixedly installed between the air guide pipe 10 and the two elastic booster sleeves 17. When the suction plate 35 moves backward, it will draw outside air into the air box 7 through the air supply pipe 33. When the suction plate 35 moves forward, it will push out the air drawn into the air box 7 through the air guide pipe 10 and introduce it into the elastic pressure sleeve 17 through the air injection pipe 9, which will continuously inflate the elastic pressure sleeve 17.

[0043] After the elastic pressurizing sleeve 17 is filled with air, it will gradually expand and encroach on the internal space of the nitrogen generation zone 1, reducing the internal volume of the nitrogen generation zone 1 and thus increasing the internal pressure of the nitrogen generation zone 1. This pressurization can further enhance the oxygen adsorption capacity of the molecular sieve box 15, give full play to the adsorption and separation performance of the molecular sieve box 15, and achieve energy-saving operation while improving gas production efficiency.

[0044] Example 4: Refer to Figures 3-6 as well as Figure 12 , Figures 15-16 The difference between this embodiment and embodiment three is that the pressure equalization and desorption unit includes a gas storage component and a stamping component. The gas storage component is provided with a gas storage box 16 for storing air in the elastic pressurizing sleeve 17, and the stamping component is provided with a pressure equalization box 20 for achieving pressure equalization between nitrogen generation zone one and nitrogen generation zone two. The gas storage assembly includes a gas storage box 16 fixedly installed inside the nitrogen generator 1, and the gas storage box 16 is located at the lower part of the partition plate 11. Both elastic pressure-boosting sleeves 17 are fixedly connected to the gas storage box 16 with a gas extraction pipe 32 for venting. Once the compressed air in nitrogen generation zone 1 has finished generating nitrogen, the suction pipe 32 on the corresponding elastic pressure boosting sleeve 17 can be opened to allow the air in the elastic pressure boosting sleeve 17 to enter the air storage tank 16 for storage through the suction pipe 32, thus completing the depressurization of the elastic pressure boosting sleeve 17. When the air inside the elastic pressure booster sleeve 17 decreases, it will automatically contract. At this time, the internal volume of the nitrogen generation zone increases and the pressure will decrease simultaneously. The oxygen adsorbed in the molecular sieve box 15 will automatically desorb under low pressure, thereby promoting the oxygen release efficiency.

[0045] In a further embodiment, the equalizing box 20 is fixedly installed on the partition plate 12, and the equalizing box 20 is located above the two molecular sieve boxes 15. After the nitrogen production process in nitrogen production zone 1 is completed, some high-pressure nitrogen gas is still stored in temporary storage zone 1 in nitrogen production zone 1. At this time, the equalizing box 20 is opened to connect temporary storage zone 1 and temporary storage zone 2 in nitrogen production zone 1 and nitrogen production zone 2. The high-pressure nitrogen gas in temporary storage zone 1 is injected into temporary storage zone 2 through the equalizing box 20, thereby reducing the internal pressure of temporary storage zone 1 and increasing the internal pressure of temporary storage zone 2, thus completing the equalization of nitrogen production zone 1 and nitrogen production zone 2. This fully utilizes the remaining pressure energy inside the temporary storage area, avoiding energy loss caused by direct venting of high-pressure gas. At the same time, it boosts the pressure of the nitrogen production area, reducing the energy consumed during subsequent nitrogen production and pressure boosting, resulting in better energy-saving effects.

[0046] After the internal pressure of nitrogen generation zone one decreases, the oxygen adsorbed in the molecular sieve box 15 will be fully desorbed and released, and diffused throughout nitrogen generation zone one. After nitrogen generation zone two is pressurized, the equalization box 20 is closed and the air inlet pipe 2 5 is opened to introduce compressed air into nitrogen generation zone two. The nitrogen generation process of nitrogen generation zone one can be replicated in nitrogen generation zone two, realizing the uninterrupted operation of the nitrogen generation process and effectively improving the efficiency of nitrogen production.

[0047] The stamping assembly includes a return air plate 2 that is slidably installed in the gas storage box 16, and a plurality of lifting spring rods 26 for lifting and resetting are fixedly installed between the return air plate 2 and the bottom of the gas storage box 16. The gas storage box 16 and the partition plate 11 are fixedly connected to two air-filling boxes 31 for air filling, and the two air-filling boxes 31 are located in nitrogen production zone one and nitrogen production zone two respectively. After the elastic booster sleeve 17 enters the air storage tank 16, it will accumulate on the upper part of the return air plate 2 and push the return air plate 2 downward. When the return air plate 2 moves downward, it will compress the multiple lifting spring rods 26 at the bottom.

[0048] Two waste oxygen discharge pipes 14 for discharging oxygen-enriched tail gas are fixedly connected to the nitrogen generator 1, and the two waste oxygen discharge pipes 14 are located in nitrogen generation zone one and nitrogen generation zone two respectively. Once the oxygen in the molecular sieve box 15 has been desorbed, the waste oxygen discharge pipe 14 on the nitrogen generation zone 1 can be opened, allowing the oxygen-enriched tail gas to be discharged directly through the waste oxygen discharge pipe 14. At the same time, the air inlet box 31 located in the nitrogen generation zone 1 is opened to depressurize the gas storage tank 16. During depressurization, multiple lifting spring rods 26 will automatically reset and push the return air plate 2 upward. The upward movement of the return air plate 2 will squeeze the air accumulated on it, causing it to be rushed into the nitrogen generation zone 1 through the air inlet box 31. The air entering the nitrogen generation zone 1 will quickly impact the oxygen-enriched tail gas inside, causing it to be quickly discharged from the waste oxygen discharge pipe 14, thereby effectively improving the emission efficiency of the oxygen-enriched tail gas.

[0049] The waste oxygen discharge pipe 14, the inlet pipe 4, the extraction pipe 32, and other pipes used for transporting gas mentioned above are all equipped with one-way valves. The opening and closing of the one-way valves controls the connection status of the pipes and the direction of airflow, so that the gas inside the nitrogen generator 1 will not leak or backflow.

[0050] The working principle of this nitrogen generator is as follows: When generating nitrogen, first open the air inlet pipe 4 to introduce compressed air into the nitrogen generation zone 1. As the compressed air is continuously injected, the internal pressure of the nitrogen generation zone 1 continues to increase. Under the action of pressure, the compressed air flows upward and passes through the molecular sieve box 15. The oxygen in the box is adsorbed by the medium in the molecular sieve box 15 and separated from the nitrogen. After separation, the nitrogen enters the temporary storage zone 1 through the molecular sieve box 15 and is directly discharged through the nitrogen outlet pipe 8, thus completing the collection of pure nitrogen.

[0051] When nitrogen flows in the nitrogen pipe 8, the elastic pressure sleeve 17 is continuously inflated by the cooperation of the gas guiding component and the pressure boosting component, causing it to gradually expand. When the elastic pressure sleeve 17 expands, it reduces the internal volume of the nitrogen generation zone and increases the internal pressure. By pressurizing, the molecular sieve box 15 is further enhanced to adsorb oxygen, thereby improving the efficiency of nitrogen separation and preparation.

[0052] After the nitrogen production process in nitrogen production zone 1 is completed, the equalization box 20 is opened to connect temporary storage zones 1 and 2 within nitrogen production zone 1 and nitrogen production zone 2. High-pressure nitrogen gas in temporary storage zone 1 is injected into temporary storage zone 2 through the equalization box 20, reducing the internal pressure of temporary storage zone 1 and increasing the internal pressure of temporary storage zone 2, thus completing the equalization of nitrogen production zone 1 and nitrogen production zone 2.

[0053] After the nitrogen generation zone 2 has been pressurized, the equalization box 20 is closed and the air inlet pipe 2 5 is opened to introduce compressed air into the nitrogen generation zone 2. The nitrogen generation process of the nitrogen generation zone 1 is repeated in the nitrogen generation zone 2 to achieve uninterrupted nitrogen generation.

[0054] After the internal pressure of nitrogen generation zone 1 decreases, the oxygen adsorbed in molecular sieve box 15 will be fully desorbed, released, and diffused in nitrogen generation zone 1. Then, the waste oxygen discharge pipe 14 on nitrogen generation zone 1 is opened so that the oxygen-enriched tail gas can be directly discharged through the waste oxygen discharge pipe 14. During the oxygen-enriched exhaust gas emission process, air is rapidly injected into the nitrogen generation zone 1 through the cooperation of the stamping components. The air entering the nitrogen generation zone 1 will quickly impact the oxygen-enriched exhaust gas inside, causing it to be rapidly discharged from the waste oxygen discharge pipe 14, further improving the emission efficiency of the oxygen-enriched exhaust gas.

[0055] This invention also provides an energy-saving nitrogen generation method with pressure swing adsorption (PSA) function, used in the aforementioned energy-saving nitrogen generation equipment, comprising the following steps: S1. Compressed air is injected into nitrogen generation zone one through the air injection component, so that the internal pressure of nitrogen generation zone one gradually increases; S2. The compressed air in nitrogen generation zone 1 comes into contact with the molecular sieve box 15 in the nitrogen generation component under high pressure. The molecular sieve box 15 will adsorb the oxygen in the compressed air, and the pure nitrogen will pass through the molecular sieve box 15 and then be discharged through the nitrogen exhaust pipe 8 in the gas guiding component. S3. When nitrogen is discharged, the booster assembly is driven to fill the elastic booster sleeve 17 with external air to expand it, reduce the volume of nitrogen generation zone 1, increase the internal pressure, and enhance the oxygen and nitrogen adsorption and separation effect. S4. After nitrogen generation in nitrogen generation zone one is completed, open the equalizing box 20 in the stamping assembly to allow the remaining high-pressure nitrogen in nitrogen generation zone one to enter nitrogen generation zone two, thereby equalizing the internal pressure of nitrogen generation zone one and nitrogen generation zone two. S5. By adsorbing the air inside the elastic pressure boosting sleeve 17 through the gas storage box 16, the internal volume of the nitrogen generation zone is increased and the pressure is reduced. After the pressure is reduced, the oxygen adsorbed in the molecular sieve box 15 is automatically desorbed. S6. The air in the gas storage tank 16 is released by the stamping component, and the oxygen-rich tail gas inside the nitrogen generation zone is impacted and quickly discharged from the nitrogen generation zone. S7. While nitrogen generation zone one completes the desorption operation, compressed air is introduced into nitrogen generation zone two to repeat the nitrogen generation process of S1-S6, so as to realize the alternating nitrogen generation of nitrogen generation zone one and nitrogen generation zone two.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving nitrogen generator with pressure swing adsorption (PSA) function, comprising a nitrogen generator tank (1), characterized in that, Also includes: A partition plate (11) and a top plate (13) are fixedly installed inside the nitrogen generator (1), and a partition plate (12) for dividing the inside of the nitrogen generator (1) into a nitrogen generation zone one and a nitrogen generation zone two is fixedly installed between the partition plate (11) and the top plate (13). An air injection assembly for introducing compressed air into the nitrogen generation zone one and the nitrogen generation zone two is provided on the nitrogen generator (1). Nitrogen generation components are installed in both nitrogen generation zone 1 and nitrogen generation zone 2, and molecular sieve boxes (15) for adsorbing oxygen and permeating nitrogen are installed in the nitrogen generation components. The pressure swing adsorption unit is installed inside the nitrogen generator (1) and includes a gas guiding component and a pressurizing component. The gas guiding component is equipped with a nitrogen discharge pipe (8) for discharging pure nitrogen gas, and the pressurizing component is equipped with two elastic pressurizing sleeves (17) for adjusting the internal pressure of nitrogen generation zone one and nitrogen generation zone two. The pressure equalization and desorption unit installed in the nitrogen generator (1) includes a gas storage component and a stamping component. The gas storage component is provided with a gas storage box (16) for storing air in the elastic pressurizing sleeve (17), and the stamping component is provided with a pressure equalization box (20) for achieving pressure equalization between nitrogen generation zone one and nitrogen generation zone two.

2. The energy-saving nitrogen generator with pressure swing adsorption function according to claim 1, characterized in that, The nitrogen generator (1) is equipped with a smart control host (6) on its side. The smart control host (6) is used to control the operation and on / off status of the nitrogen assembly, pressure swing adsorption unit, and pressure equalization desorption unit, so as to realize the energy-saving and efficient preparation of nitrogen.

3. The energy-saving nitrogen generator with pressure swing adsorption function according to claim 1, characterized in that, The air injection assembly includes an air inlet cylinder (3) for conveying compressed air, and a filter disc and an activated carbon adsorption plate are fixedly installed inside the air inlet cylinder (3). The filter disc is used to filter impurities in the compressed air, and the activated carbon adsorption plate is used to adsorb water vapor in the compressed air. The nitrogen generator (1) is fixedly connected to an air inlet pipe 1 (4) and an air inlet pipe 2 (5), and the gas injection ends of the air inlet pipe 1 (4) and the air inlet pipe 2 (5) are located in nitrogen generation zone 1 and nitrogen generation zone 2, respectively. The air inlet pipe 1 (4) and the air inlet pipe 2 (5) are both connected to the air inlet cylinder (3).

4. The energy-saving nitrogen generator with pressure swing adsorption function according to claim 3, characterized in that, The nitrogen generation assembly includes two support frames (21) fixedly installed on the side of the partition plate (12), and the molecular sieve box (15) is vertically slidably installed between the two support frames (21). The upper and lower parts of the molecular sieve box (15) and the two support frames (21) are both fixedly installed with shock-absorbing springs (22) to buffer its vibration. A flow guiding mechanism is installed between the two support frames (21).

5. An energy-saving nitrogen generator with pressure swing adsorption function according to claim 4, characterized in that, The flow guiding mechanism includes a flow guiding plate (19) fixedly installed between two support frames (21), and the flow guiding plate (19) is located at the lower part of the molecular sieve box (15). Multiple staggered flow guiding plates one (23) and two flow guiding plates two (24) for conducting compressed air are fixedly installed in the flow guiding plate (19). Each flow guiding plate one (23) has multiple flow guiding straight holes, and each flow guiding plate two (24) has multiple flow guiding spiral holes. The lower part of the guide plate (19) is provided with a support groove, and a synchronizing rod (27) is slidably installed in the support groove. Multiple shielding plates (25) for selectively shielding the first guide plate (23) or the second guide plate (24) are fixedly installed on the synchronizing rod (27). An electromagnetic plate (29) is fixedly installed on the synchronizing rod (27). An electromagnetic plate (30) that cooperates with the electromagnetic plate (29) is fixedly installed on the inner wall of the support groove. A reset spring rod (28) for resetting is fixedly installed between the electromagnetic plate (29) and the inner wall of the support groove.

6. The energy-saving nitrogen generator with pressure swing adsorption function according to claim 4, characterized in that, The gas guiding assembly includes two nitrogen gas conduits (18) for outputting nitrogen gas, which are fixedly connected to the upper part of the capping plate (13). The two nitrogen gas conduits (18) are respectively connected to nitrogen generation zone one and nitrogen generation zone two. The nitrogen gas discharge pipe (8) is fixedly connected between the two nitrogen gas conduits (18). An air blasting box (7) is fixedly installed on the top plate (13). A linkage roller (34) is rotatably installed between the air blasting box (7) and the nitrogen pipe (8). Multiple wind impellers (36) are fixedly installed on the linkage roller (34), and all the wind impellers (36) are located inside the nitrogen pipe (8).

7. An energy-saving nitrogen generator with pressure swing adsorption (PSA) function according to claim 6, characterized in that, The pressurization assembly includes a cylindrical cam (37) fixedly mounted on the linkage roller (34), an air suction plate (35) for adsorbing air is slidably mounted in the air box (7), a pusher (38) is fixedly mounted on the air suction plate (35), and a spiral cam groove (39) that cooperates with the pusher (38) is opened on the cylindrical cam (37). The two elastic booster sleeves (17) are fixedly installed on both sides of the partition plate (12). The air box (7) is fixedly connected to the air supply pipe (33) for air intake. The lower part of the air box (7) is fixedly connected to the air guide pipe (10) for exhaust. The air guide pipe (10) and the two elastic booster sleeves (17) are both fixedly installed with air injection pipes (9) for air filling.

8. An energy-saving nitrogen generator with pressure swing adsorption function according to claim 7, characterized in that, The gas storage assembly includes a gas storage box (16) fixedly installed inside the nitrogen generator (1), and the gas storage box (16) is located at the lower part of the partition plate (11). Both of the two elastic pressure-boosting sleeves (17) are fixedly connected to the gas storage box (16) by a gas extraction pipe (32) for venting.

9. An energy-saving nitrogen generator with pressure swing adsorption function according to claim 8, characterized in that, The stamping assembly includes a return air plate (2) that is slidably installed in the gas storage box (16), and a plurality of lifting spring rods (26) for lifting and resetting are fixedly installed between the return air plate (2) and the bottom of the gas storage box (16). The gas storage box (16) and the partition plate (11) are fixedly connected to two air-filling boxes (31) for air filling, and the two air-filling boxes (31) are located in nitrogen production zone one and nitrogen production zone two respectively. The pressure equalization box (20) is fixedly installed on the partition plate (12), and the pressure equalization box (20) is located above the two molecular sieve boxes (15). The nitrogen production tank (1) is fixedly connected to two waste oxygen discharge pipes (14) for discharging oxygen-enriched tail gas, and the two waste oxygen discharge pipes (14) are located in nitrogen production zone one and nitrogen production zone two respectively.

10. An energy-saving nitrogen generation method with pressure swing adsorption (PSA) function, used in the energy-saving nitrogen generation equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Compressed air is injected into nitrogen generation zone one through the air injection component, so that the internal pressure of nitrogen generation zone one gradually increases; S2. The compressed air in the nitrogen generation zone 1 comes into contact with the molecular sieve box (15) in the nitrogen generation assembly under high pressure. The molecular sieve box (15) will adsorb the oxygen in the compressed air, and the pure nitrogen will pass through the molecular sieve box (15) and then be discharged through the nitrogen exhaust pipe (8) in the gas delivery assembly. S3. When nitrogen is discharged, the booster assembly is driven to fill the elastic booster sleeve (17) with external air to expand it, reduce the volume of nitrogen generation zone 1, increase the internal pressure, and enhance the oxygen and nitrogen adsorption and separation effect. S4. After nitrogen generation in nitrogen generation zone 1 is completed, open the equalizing box (20) in the stamping assembly to allow the remaining high-pressure nitrogen in nitrogen generation zone 1 to enter nitrogen generation zone 2, thereby equalizing the internal pressure of nitrogen generation zone 1 and nitrogen generation zone 2. S5. By adsorbing the air inside the elastic pressure booster sleeve (17) through the gas storage box (16), the internal volume of the nitrogen generation zone is increased and the pressure is reduced. After the pressure is reduced, the oxygen adsorbed in the molecular sieve box (15) is automatically desorbed. S6. The air in the gas storage tank (16) is released by the stamping component, and the oxygen-rich tail gas inside the nitrogen generation zone is impacted and quickly discharged from the nitrogen generation zone. S7. While nitrogen generation zone one completes the desorption operation, compressed air is introduced into nitrogen generation zone two to repeat the nitrogen generation process of S1-S6, so as to realize the alternating nitrogen generation of nitrogen generation zone one and nitrogen generation zone two.

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