Device for rapidly improving purity during starting-up of pressure swing adsorption nitrogen generation

Abstract

The utility model discloses a pressure swing adsorption nitrogen generation starting-up rapid purity improving device, and belongs to the field of nitrogen generation devices, the pressure swing adsorption nitrogen generation starting-up rapid purity improving device comprises a base, and the top end of the base is sequentially provided with an air compressor, a buffer tank, a freeze dryer, a first reaction tank, a second reaction tank and a gas storage tank; an air inlet frame is fixedly mounted on the side, away from the buffer tank, of the air compressor, a mounting frame is arranged in the air inlet frame, dust collection cotton is arranged in the mounting frame, an air inlet is formed in the top end of the air inlet frame, a blocking block matched with the air inlet is fixedly mounted at the top end of the mounting frame, and clamping blocks are fixedly mounted on the two sides of the blocking block; a clamping groove matched with the blocking block is formed in the top end of the air inlet frame. Through the arrangement of the dustproof cotton, the function of filtering dust in the air is achieved, through the cooperation of the molecular filter, the fine filter and the ultra-fine filter, the function of absorbing and filtering water vapor and oil in the air is achieved, and the nitrogen extraction quality can be improved.

Description

Technical Field

[0001] This application relates to the field of nitrogen production devices, and more specifically, to a device for rapidly improving the purity during the startup of pressure swing adsorption nitrogen production. Background Technique

[0002] Pressure swing adsorption nitrogen equipment uses carbon molecular sieve as an adsorbent and utilizes the principle of pressure swing adsorption to produce nitrogen. The principle of separating air depends on the different diffusion rates of oxygen and nitrogen in the micropores of the carbon molecular sieve. The diffusion rate of oxygen into the molecular sieve is much faster, so oxygen molecules are adsorbed on the solid phase of the carbon molecular sieve, while nitrogen molecules are enriched in the gas phase. The oxygen adsorption capacity of the carbon molecular sieve increases with the increase in pressure and decreases with the decrease in pressure. In this way, the carbon molecular sieve adsorbs oxygen under pressure and desorbs oxygen under reduced pressure, forming a cyclic operation to achieve the purpose of nitrogen production.

[0003] Some existing nitrogen production devices are compressed by an air compressor and then enter the nitrogen production device, and then are collected after production. Some existing nitrogen production devices directly introduce air into the interior of the nitrogen production device. The air may contain dust, which will affect the subsequent nitrogen production quality of the equipment. Therefore, in order to solve the above problems, we propose a device for rapidly improving the purity during the startup of pressure swing adsorption nitrogen production. Utility Model Content

[0004] In order to solve the above problems, this application provides a device for rapidly improving the purity during the startup of pressure swing adsorption nitrogen production, and adopts the following technical solutions:

[0005] A device for rapidly improving the purity during the startup of pressure swing adsorption nitrogen production includes a base. An air compressor, a buffer tank, a refrigerated dryer, a first reaction tank, a second reaction tank, and a gas storage tank are sequentially arranged at the top of the base;

[0006] An air intake frame is fixedly installed on the side of the air compressor away from the buffer tank. An installation frame is arranged inside the air intake frame. Dust-absorbing cotton is arranged inside the installation frame. An air intake port is opened at the top of the air intake frame, and a plug block matching the air intake port is fixedly installed at the top of the installation frame. Clamping blocks are fixedly installed on both sides of the plug block. A clamping groove matching the plug block is opened at the top of the air intake frame. First movable grooves are opened on the inner walls of one side of the clamping groove, and fixing components are arranged inside the first movable grooves;

[0007] A first conduit is connected between the air compressor and the buffer tank, and a filtering assembly is connected to the first conduit. A second conduit is provided between the buffer tank and the freeze dryer, and a first one-way valve is provided in the middle of the second conduit. A third conduit is connected between the freeze dryer and the first reaction tank. A fourth conduit is connected between the first reaction tank and the second reaction tank, and a second one-way valve is provided in the middle of the fourth conduit. A reflux pipe is provided between the bottom end of the second reaction tank and the first reaction tank, and a fourth one-way valve is provided in the middle of the reflux pipe. A concentration detector is provided on the side wall of the second reaction tank. A fifth conduit is connected between the second reaction tank and the gas storage tank, and a third one-way valve is provided between the fifth conduits.

[0008] Support rings are fixedly installed in both the first reaction tank and the second reaction tank, and sleeves are provided on the tops of the two support rings. Carbon molecular sieve plates arranged in a linear array are fixedly installed in the sleeves, and positioning assemblies are provided between the sleeves and the support rings of the same group.

[0009] By adopting the above technical solution, when the device is in use, the staff moves the installation frame with the dust-absorbing cotton into the air inlet frame, so that the plug block installed at the top of the installation frame is engaged with the air inlet opened at the top of the air inlet frame. Subsequently, the plug block and the air inlet frame are fixed through the fixing component, which can play a role in fixing the dust-absorbing cotton. Then, through the operation of the air compressor, air enters the air compressor for compression through the air inlet frame. The setting of the dust-absorbing cotton in the air inlet frame plays a role in filtering dust in the air. Subsequently, the air enters the buffer tank through the first conduit, and a filtering assembly is provided on the side wall of the first conduit, achieving the effect of further filtering the air, playing a role in removing water vapor and oil mist in the air, which is beneficial to improving the processing quality of nitrogen. Subsequently, the gas enters the freeze dryer through the second conduit. The freeze dryer can play a role in removing water vapor in the air. The air after removing water vapor enters the first reaction tank through the third conduit. The setting of the carbon molecular sieve plate in the first reaction tank plays a role in absorbing oxygen, and nitrogen is enriched in the tank body. Subsequently, the gas enters the second reaction tank through the fourth conduit. The carbon molecular sieve plate is provided in the second reaction tank, playing a role in further absorbing oxygen. A concentration detector is provided in the second reaction tank, playing a role in detecting the nitrogen concentration inside the second reaction tank. When the nitrogen purity in the second reaction tank is insufficient, the gas enters the first reaction tank through the reflux pipe and circulates multiple times to achieve the effect of fully purifying nitrogen. Subsequently, the oxygen in the first reaction tank and the second reaction tank is discharged. Then, nitrogen enters the gas storage tank through the fifth conduit, which can play a role in collecting nitrogen.

[0010] Through the setting of the positioning assembly between the sleeve and the support ring of the same group, it plays a role in positioning and fixing the sleeve, and thus plays a role in fixing the carbon molecular sieve plate, facilitating the subsequent extraction of nitrogen by the device and facilitating the subsequent disassembly and maintenance of the carbon molecular sieve plate by the staff.

[0011] Furthermore, the fixing assembly includes a fixing block slidably installed in the first movable groove, a first spring is fixedly connected between the inner wall of the fixing block on the side away from the card block in the same group and the side opposite to the first movable groove in the same group, two side walls of the card blocks are provided with fixing grooves matching the fixed blocks in the same group, a toggle block is fixedly installed on the top of the fixing block, and the tops of the two toggle blocks slide through the first movable grooves in the same group.

[0012] By adopting the above technical scheme, the staff will enter the installation frame into the air intake frame from the inlet and outlet opened at the top of the air intake frame, and make the card block enter the card slot opened at the top of the air intake frame. When the card block slides into the card slot of the same group, the card block pushes the fixed block of the same group to slide into the first movable slot, and the fixed block pushes the first spring of the same group to contract. Then, when the card block is engaged with the card slot of the same group, the fixed block returns to its original position under the elastic force of the first spring of the same group, and makes the fixed block engage with the fixed slot opened on the side wall of the card block, so as to play the role of fixing the card block, thereby achieving the effect of fixing the dust cotton. When the dust cotton needs to be removed, the staff only needs to pull the fixed block of the same group to slide into the first movable slot through the toggle block, so that the fixed block is disengaged from the fixed slot opened on the side wall of the card block, and then the dust cotton can be pulled out through the handle installed on the top of the block.

[0013] Furthermore, the two fixed blocks are fixedly installed with limiting blocks on both sides of one end away from the same group of the clamping blocks, and the inner walls of the two first movable grooves are provided with limiting grooves matching the limiting blocks in the same group.

[0014] By adopting the above technical solution, when the fixed block slides in the first movable groove, the fixed block slides in the limiting groove with the same group of limiting blocks. The cooperation between the limiting block and the limiting groove is conducive to maintaining the sliding stability of the fixed block and helps to prevent the fixed block from leaving the first movable groove.

[0015] Furthermore, sliders are fixedly installed on both sides of the installation frame, the inner wall of the air intake frame is provided with a slide groove matching the slider on the same side, the side wall of the installation frame is provided with a sealing sleeve, and two symmetrically distributed rubber blocks are fixedly installed on the bottom end of the installation frame, and the inner wall of the bottom end of the air intake frame is provided with a groove matching the rubber block in the same group.

[0016] By adopting the above technical scheme, when the installation frame slides into the air intake frame, the slider installed on the side wall of the installation frame engages with the slide groove provided on the inner wall of the air intake frame. Through the cooperation of the slider and the slide groove, the installation frame is positioned, which is beneficial to maintaining the sliding stability of the installation frame. The rubber block installed on the bottom end of the installation frame engages with the groove provided on the inner wall of the bottom end of the air intake frame, which plays a role in positioning and fixing the installation frame. The side wall of the installation frame is provided with a sealing sleeve, which is beneficial to increase the sealing of the installation frame and the air intake frame.

[0017] Furthermore, the filter assembly includes a molecular filter connected to the first conduit, a fine filter and an ultra-fine filter are provided on the side wall of the first conduit, and the fine filter is located between the molecular filter and the ultra-fine filter.

[0018] By adopting the above technical solution, the side wall of the first conduit is provided with a molecular filter, a fine filter and an ultra-fine filter, which can filter and remove water vapor, dust and oil mist in the air, thereby improving the quality of the air and facilitating the subsequent extraction of nitrogen by the equipment.

[0019] Furthermore, the positioning assembly includes two plug blocks arranged at the bottom end of the sleeve, the top of the support ring is provided with a slot matching the plug block in the same group, the inner wall of the slot is provided with two symmetrically distributed second movable grooves, positioning rods are slidably installed in the second movable grooves, a second spring is fixedly connected between the opposite side of the two positioning rods in the same group and the inner wall of one side of the second movable groove in the same group, the side wall of the plug block is provided with a positioning groove matching the positioning rod in the same group, two symmetrically distributed rubber rods are fixedly installed at the bottom end of the sleeve, and the top of the support ring is provided with a receiving groove matching the rubber rod in the same group.

[0020] By adopting the above technical scheme, the staff places the sleeve above the support ring of the same group, so that the plug installed at the bottom end of the sleeve moves into the slot opened at the top of the support ring. When the plug slides into the slot of the same group, the plug pushes the positioning rod of the same group to slide into the second movable slot of the same group, and the positioning rod pushes the second spring of the same group to contract. When the plug and the slot of the same group are engaged, the positioning rod is engaged with the positioning slot opened on the side wall of the plug under the push of the elastic force of the second spring of the same group, which can play the role of positioning and fixing the plug, and can play the role of fixing the carbon molecular sieve plate. When the sleeve and the support ring are fitted, the rubber rod installed at the bottom end of the sleeve is engaged with the receiving groove opened at the top of the support ring, and the sleeve is positioned and fixed through the cooperation of the rubber rod and the support ring.

[0021] Furthermore, two symmetrically distributed stabilizing blocks are fixedly mounted on the side walls at opposite ends of the two positioning rods in the same group, and a stabilizing groove matching the stabilizing blocks in the same group is formed on the inner wall of the second movable groove.

[0022] By adopting the above technical solution, when the positioning rod slides in the second movable groove, the positioning rod slides with the stabilizing block in the stabilizing groove on the same side. The cooperation between the stabilizing block and the stabilizing groove is helpful to maintain the sliding stability of the positioning rod and helps to prevent the positioning rod from leaving the second movable groove in the same group.

[0023] Furthermore, a mounting ring is fixedly installed in the return pipe, and a guide fan is arranged in the mounting ring.

[0024] By adopting the above technical solution, the arrangement of the diversion fan in the return pipe plays a role in diversion.

[0025] In summary, the present application includes the following beneficial technical effects:

[0026] (1) In the present utility model, the arrangement of the dust-proof cotton plays a role in filtering dust in the air, and through the cooperation of the molecular filter, the fine filter and the ultra-fine filter, it plays a role in absorbing and filtering water vapor and oil substances in the air, which is beneficial to improving the extraction quality of nitrogen.

[0027] (2) In the present utility model, the arrangement of the fixing component plays a role in fixing the installation frame, which is beneficial to improving the stability of the installation of the dust-proof cotton, and is convenient for the staff to replace and clean the dust-proof cotton subsequently, which is beneficial to maintaining the filtering and dust-proof effect of the equipment.

[0028] (3) In the present utility model, the arrangement of the carbon molecular sieve plate plays a role in filtering and separating oxygen and nitrogen, and through the arrangement of the positioning component between the carbon molecular sieve plate and the support ring, it plays a role in positioning and fixing the carbon molecular sieve plate, which is convenient for the staff to disassemble and replace subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a pressure swing adsorption nitrogen production device for quickly improving purity during startup;

[0030] Figure 2 For the present utility model Figure 1 An enlarged view of A in;

[0031] Figure 3 It is a cross-sectional view of the air inlet frame in the present utility model;

[0032] Figure 4 For the present utility model Figure 3 An enlarged view of B in;

[0033] Figure 5 It is a cross-sectional view of the first reaction tank and the second reaction tank in the present utility model;

[0034] Figure 6 For the present utility model Figure 5 An enlarged view of C in;

[0035] Figure 7 It is a cross-sectional view of the support ring in the present utility model;

[0036] Figure 8 For the present utility model Figure 7 An enlarged view of D in;

[0037] Description of the reference numerals in the drawings:

[0038] 1. Base; 2. Air compressor; 3. Intake frame; 4. Molecular filter; 5. Fine filter; 6. Ultra-fine filter; 7. First conduit; 8. Buffer tank; 9. First check valve; 10. Second conduit; 11. Freeze dryer; 12. Third conduit; 13. First reaction tank; 14. Fourth conduit; 15. Second check valve; 16. Second reaction tank; 17. Third check valve; 18. Fifth conduit; 19. Gas storage tank; 20. Return pipe; 21. Fourth check valve; 22. Installation frame; 23. Plug block; 24. Clamping block; 25. Card slot; 26. Dust-absorbing cotton; 27. Fixed block; 28. First spring; 29. First movable slot; 30. Rubber block; 31. Carbon molecular sieve plate; 32. Sleeve; 33. Support ring; 34. Installation ring; 35. Guide fan; 36. Insert block; 37. Insert slot; 38. Second spring; 39. Positioning rod; 40. Second movable slot. Detailed implementation manner

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0040] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The following is a further detailed description of the present application in conjunction with the attached Figures 1-8 This application is further described in detail below.

[0043] Please refer to Figures 1-8, A device for rapidly improving the purity during the startup of pressure swing adsorption nitrogen production, which includes a base 1. On the top of the base 1, an air compressor 2, a buffer tank 8, a refrigerated dryer 11, a first reaction tank 13, a second reaction tank 16, and a gas storage tank 19 are successively arranged. On the side of the air compressor 2 away from the buffer tank 8, an air inlet frame 3 is fixedly installed. Inside the air inlet frame 3, an installation frame 22 is provided. Inside the installation frame 22, a dust-absorbing cotton 26 is provided. An air inlet is opened at the top of the air inlet frame 3, and the top of the installation frame 22 is fixedly installed with a plug block 23 that matches the air inlet. On both sides of the plug block 23, clamping blocks 24 are fixedly installed. A card slot 25 that matches the plug block 23 is opened at the top of the air inlet frame 3. On the inner wall of one side of the card slot 25, a first movable slot 29 is opened. Inside the first movable slot 29, a fixing component is provided. The fixing component includes a fixing block 27 slidably installed inside the first movable slot 29. Between the side of the fixing block 27 away from the clamping block 24 of the same group and the inner wall of the side of the first movable slot 29 opposite to it, a first spring 28 is fixedly connected. On the side walls of the two clamping blocks 24, fixing slots that match the fixing block 27 of the same group are opened. On the top of the fixing blocks 27, toggle blocks are fixedly installed, and the tops of the two toggle blocks slidably penetrate through the first movable slot 29 of the same group.

[0044] The staff enters the installation frame 22 into the air inlet frame 3 through the inlet and outlet opened at the top of the air inlet frame 3, and makes the clamping block 24 enter the card slot 25 opened at the top of the air inlet frame 3. When the clamping block 24 slides into the card slot 25 of the same group, the clamping block 24 pushes the fixing block 27 of the same group to slide into the first movable slot 29, and the fixing block 27 pushes the first spring 28 of the same group to contract. Subsequently, after the clamping block 24 is engaged with the card slot 25 of the same group, the fixing block 27 returns to its original position under the elastic force of the first spring 28 of the same group, and the fixing block 27 is engaged with the fixing slot opened on the side wall of the clamping block 24 of the same group, which can play a role in fixing the clamping block 24, and thus achieve the effect of fixing the dust-absorbing cotton 26. When it is necessary to disassemble the dust-absorbing cotton 26, the staff only needs to pull the fixing block 27 of the same group to slide into the first movable slot 29 through the toggle block, so that the fixing block 27 is disengaged from the fixing slot opened on the side wall of the clamping block 24, and then the dust-absorbing cotton 26 can be pulled out through the handle installed at the top of the plug block 23.

[0045] On both sides of one end of the two fixing blocks 27 away from the clamping block 24 of the same group, limit blocks are fixedly installed. On the inner walls of the two first movable slots 29, limit slots that match the limit blocks of the same group are opened. When the fixing block 27 slides inside the first movable slot 29, the fixing block 27 drives the limit block of the same group to slide inside the limit slot. Through the cooperation of the limit block and the limit slot, it is beneficial to maintain the stability of the sliding of the fixing block 27 and helps to prevent the fixing block 27 from disengaging from the first movable slot 29.

[0046] Sliders are fixedly installed on both sides of the installation frame 22. Sliding grooves matching the sliders on the same side are provided on the inner wall of the air intake frame 3. A sealing sleeve is sleeved on the side wall of the installation frame 22, and two symmetrically distributed rubber blocks 30 are fixedly installed at the bottom end of the installation frame 22. Grooves matching the rubber blocks 30 in the same group are provided on the inner wall of the bottom end of the air intake frame 3. When the installation frame 22 slides into the air intake frame 3, the sliders installed on the side wall of the installation frame 22 are engaged with the sliding grooves provided on the inner wall of the air intake frame 3. Through the cooperation of the sliders and the sliding grooves, the installation frame 22 can be positioned, which is beneficial to maintaining the stability of the sliding of the installation frame 22. Moreover, the rubber blocks 30 installed at the bottom end of the installation frame 22 are engaged with the grooves provided on the inner wall of the bottom end of the air intake frame 3, which plays a role in positioning and fixing the installation frame 22. And due to the arrangement of the sealing sleeve on the side wall of the installation frame 22, it is beneficial to increase the sealing performance of the fitting between the installation frame 22 and the air intake frame 3.

[0047] Positioning components are provided between the sleeve 32 and the support rings 33 in the same group. The positioning components include two insertion blocks 36 provided at the bottom end of the sleeve 32. Slots 37 matching the insertion blocks 36 in the same group are provided at the top end of the support ring 33. Two symmetrically distributed second moving grooves 40 are provided on the inner wall of the slot 37. Positioning rods 39 are slidably installed in the second moving grooves 40. Second springs 38 are fixedly connected between the opposite sides of the two positioning rods 39 in the same group and the inner wall of one side of the second moving grooves 40 in the same group. Positioning grooves matching the positioning rods 39 in the same group are provided on the side wall of the insertion block 36. Two symmetrically distributed rubber rods are fixedly installed at the bottom end of the sleeve 32. Receiving grooves matching the rubber rods in the same group are provided at the top end of the support ring 33.

[0048] The staff places the sleeve 32 above the support rings 33 in the same group, so that the insertion blocks 36 installed at the bottom end of the sleeve 32 move into the slots 37 provided at the top end of the support ring 33. When the insertion blocks 36 slide into the slots 37 in the same group, the insertion blocks 36 push the positioning rods 39 in the same group to slide into the second moving grooves 40 in the same group, and the positioning rods 39 push the second springs 38 in the same group to contract. When the insertion blocks 36 are engaged with the slots 37 in the same group, the positioning rods 39 are engaged with the positioning grooves provided on the side wall of the insertion blocks 36 in the same group under the elastic force of the second springs 38 in the same group, which can play a role in positioning and fixing the insertion blocks 36, and thus can play a role in fixing the carbon molecular sieve plate 31. Moreover, when the sleeve 32 and the support ring 33 are in contact, the rubber rods installed at the bottom end of the sleeve 32 are engaged with the receiving grooves provided at the top end of the support ring 33. Through the cooperation of the rubber rods and the support ring 33, the sleeve 32 can be positioned and fixed. Two symmetrically distributed stabilizing blocks are fixedly installed on the side walls of the opposite ends of the two positioning rods 39 in the same group. Stabilizing grooves matching the stabilizing blocks in the same group are provided on the inner wall of the second moving groove 40. When the positioning rods 39 slide in the second moving groove 40, the positioning rods 39 drive the stabilizing blocks to slide in the stabilizing grooves on the same side. Through the cooperation of the stabilizing blocks and the stabilizing grooves, it is beneficial to maintain the stability of the sliding of the positioning rods 39, and it helps to prevent the positioning rods 39 from disengaging from the second moving grooves 40 in the same group.

[0049] A first conduit 7 is connected between an air compressor 2 and a buffer tank 8, and the first conduit 7 is connected with a filtering assembly. The filtering assembly includes a molecular filter 4 connected to the first conduit 7. A fine filter 5 and an ultra-fine filter 6 are provided on the side wall of the first conduit 7. The fine filter 5 is located between the molecular filter 4 and the ultra-fine filter 6. When the device is in use, the air compressor 2 operates to allow air to enter the interior of the air compressor 2 through an air intake frame 3. Through the arrangement of a dust-absorbing cotton 26 in the air intake frame 3, the dust in the air is filtered. Subsequently, the air enters the buffer tank 8 through the first conduit 7. Through the arrangement of the molecular filter 4, the fine filter 5 and the ultra-fine filter 6 on the side wall of the first conduit 7, the water vapor, dust and oil mist in the air are filtered and removed, which is beneficial to improving the quality of the air and facilitating the subsequent nitrogen extraction of the device.

[0050] A second conduit 10 is provided between the buffer tank 8 and a freeze dryer 11. A first one-way valve 9 is provided in the middle of the second conduit 10. A third conduit 12 is connected between the freeze dryer 11 and a first reaction tank 13. A fourth conduit 14 is connected between the first reaction tank 13 and a second reaction tank 16. A second one-way valve 15 is provided in the middle of the fourth conduit 14. A reflux pipe 20 is provided between the bottom end of the second reaction tank 16 and the first reaction tank 13. A fourth one-way valve 21 is provided in the middle of the reflux pipe 20. A concentration detector is provided on the side wall of the second reaction tank 16. A fifth conduit 18 is connected between the second reaction tank 16 and a gas storage tank 19. A third one-way valve 17 is provided between the fifth conduits 18; Support rings 33 are fixedly installed in both the first reaction tank 13 and the second reaction tank 16. Sleeve pipes 32 are provided at the tops of the two support rings 33. Carbon molecular sieve plates 31 arranged in a linear array are fixedly installed in the sleeve pipes 32. An installation ring 34 is fixedly installed in the reflux pipe 20. A diversion fan 35 is provided in the installation ring 34.

[0051] The gas enters the freeze dryer 11 through the second conduit 10. The freeze dryer 11 can remove the water vapor in the air. The air after removing the water vapor enters the first reaction tank 13 through the third conduit 12. Through the arrangement of the carbon molecular sieve plates 31 in the first reaction tank 13, the oxygen is absorbed, and nitrogen is enriched in the tank body. Subsequently, the gas enters the second reaction tank 16 through the fourth conduit 14. Carbon molecular sieve plates 31 are provided in the second reaction tank 16 to further absorb oxygen. A concentration detector is provided in the second reaction tank 16 to detect the nitrogen concentration inside the second reaction tank 16. When the nitrogen concentration in the second reaction tank 16 is insufficient, the gas enters the first reaction tank 13 through the reflux pipe 20 and circulates multiple times to achieve the effect of fully purifying nitrogen. Subsequently, the oxygen in the first reaction tank 13 and the second reaction tank 16 is discharged. Subsequently, the nitrogen enters the gas storage tank 19 through the fifth conduit 18, and the nitrogen can be collected.

[0052] The implementation principle of the embodiment of this application is as follows: When the device is in use, the staff moves the installation frame 22 with the dust-absorbing cotton 26 into the air inlet frame 3, so that the plug 23 installed at the top of the installation frame 22 is engaged with the air inlet opening provided at the top of the air inlet frame 3. Subsequently, the plug 23 and the air inlet frame 3 are fixed through the fixing component, which can play a role in fixing the dust-absorbing cotton 26. Then, through the operation of the air compressor 2, air enters the air compressor 2 through the air inlet frame 3 for compression. The dust-absorbing cotton 26 provided in the air inlet frame 3 plays a role in filtering dust in the air. Subsequently, the air enters the buffer tank 8 through the first conduit 7, and a filtering component is provided on the side wall of the first conduit 7 to achieve the effect of further filtering the air, playing a role in removing water vapor and oil mist in the air, which is beneficial to improving the processing quality of nitrogen. Then, the gas enters the freeze dryer 11 through the second conduit 10. The freeze dryer 11 can play a role in removing water vapor in the air. The air after removing water vapor enters the first reaction tank 13 through the third conduit 12. The carbon molecular sieve plate 31 provided in the first reaction tank 13 plays a role in absorbing oxygen, and nitrogen is enriched in the tank body. Then, the gas enters the second reaction tank 16 through the fourth conduit 14. The carbon molecular sieve plate 31 is provided in the second reaction tank 16 to play a role in further absorbing oxygen. A concentration detector is provided in the second reaction tank 16 to play a role in detecting the nitrogen concentration inside the second reaction tank 16. When the nitrogen purity in the second reaction tank 16 is insufficient, the gas enters the first reaction tank 13 through the return pipe 20 and circulates multiple times to achieve the effect of fully purifying nitrogen. Then, the oxygen in the first reaction tank 13 and the second reaction tank 16 is discharged. Subsequently, nitrogen enters the gas storage tank 19 through the fifth conduit 18, which can play a role in collecting nitrogen.

[0053] Through the setting of the positioning component between the sleeve 32 and the same group of support rings 33, it plays a role in positioning and fixing the sleeve 32, and further plays a role in fixing the carbon molecular sieve plate 31, which is convenient for the device to extract nitrogen subsequently and is also convenient for the staff to disassemble and repair the carbon molecular sieve plate 31 later.

[0054] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A device for quickly improving the purity of nitrogen produced by pressure swing adsorption, comprising a base (1), characterized in that: An air compressor (2), a buffer tank (8), a freeze dryer (11), a first reaction tank (13), a second reaction tank (16) and an air storage tank (19) are sequentially arranged on the top of the base (1); An air intake frame (3) is fixedly mounted on a side of the air compressor (2) away from the buffer tank (8), a mounting frame (22) is arranged inside the air intake frame (3), a dust collecting cotton (26) is arranged inside the mounting frame (22), an air inlet is arranged at the top of the air intake frame (3), and the top of the mounting frame (22) is fixedly mounted on a blocking block (23) matching the air inlet, a clamping block (24) is fixedly mounted on both sides of the blocking block (23), a clamping groove (25) matching the blocking block (23) is arranged at the top of the air intake frame (3), a first movable groove (29) is arranged on the inner wall of one side of the clamping groove (25), and a fixed component is arranged inside the first movable groove (29); A first conduit (7) is connected between the air compressor (2) and the buffer tank (8), and the first conduit (7) is connected to a filter assembly; a second conduit (10) is provided between the buffer tank (8) and the freeze dryer (11), and a first one-way valve (9) is provided in the middle of the second conduit (10); a third conduit (12) is connected between the freeze dryer (11) and the first reaction tank (13); a fourth conduit (14) is connected between the first reaction tank (13) and the second reaction tank (16), and a second one-way valve (15) is provided in the middle of the fourth conduit (14); a return pipe (20) is provided between the bottom end of the second reaction tank (16) and the first reaction tank (13), and a fourth one-way valve (21) is provided in the middle of the return pipe (20); a concentration detector is provided on the side wall of the second reaction tank (16); a fifth conduit (18) is connected between the second reaction tank (16) and the gas storage tank (19), and a third one-way valve (17) is provided between the fifth conduit (18); Support rings (33) are fixedly installed in the first reaction tank (13) and the second reaction tank (16), and sleeves (32) are provided on the tops of the two support rings (33), and carbon molecular sieve plates (31) distributed in a linear array are fixedly installed in the sleeves (32), and positioning components are provided between the sleeves (32) and the support rings (33) of the same group.

2. The device for rapidly improving the purity of nitrogen production by pressure swing adsorption according to claim 1, characterized in that: The fixing assembly comprises a fixing block (27) slidably mounted in the first movable groove (29), a first spring (28) being fixedly connected between the inner wall of the fixing block (27) on the side away from the clamping block (24) of the same group and opposite to the first movable groove (29) of the same group, the side walls of the two clamping blocks (24) are provided with fixing grooves matching the fixing blocks (27) of the same group, the top of the fixing block (27) is fixedly mounted with a toggle block, and the tops of the two toggle blocks slide through the first movable groove (29) of the same group.

3. The device for rapidly improving the purity of nitrogen produced by pressure swing adsorption according to claim 2 is characterized in that: Limiting blocks are fixedly installed on both sides of one end of the two fixed blocks (27) away from the same group of the clamping blocks (24), and the inner walls of the two first movable grooves (29) are provided with limiting grooves matching the limiting blocks in the same group.

4. The device for rapidly improving the purity of nitrogen produced by pressure swing adsorption according to claim 1 is characterized in that: Slide blocks are fixedly mounted on both sides of the installation frame (22); a slide groove matching the slide block on the same side is provided on the inner wall of the air intake frame (3); a sealing sleeve is provided on the side wall of the installation frame (22); and two symmetrically distributed rubber blocks (30) are fixedly mounted on the bottom end of the installation frame (22); and a groove matching the rubber block (30) of the same group is provided on the inner wall of the bottom end of the air intake frame (3).

5. The device for rapidly improving the purity of nitrogen produced by pressure swing adsorption according to claim 1 is characterized in that: The filter assembly comprises a molecular filter (4) connected to a first conduit (7); a fine filter (5) and an ultra-fine filter (6) are provided on the side wall of the first conduit (7); and the fine filter (5) is located between the molecular filter (4) and the ultra-fine filter (6).

6. The device for rapidly improving the purity of nitrogen produced by pressure swing adsorption according to claim 1 is characterized in that: The positioning assembly comprises two plug blocks (36) arranged at the bottom end of the sleeve (32); a slot (37) matching the plug blocks (36) of the same group is provided at the top end of the support ring (33); two second movable grooves (40) symmetrically distributed are provided on the inner wall of the slot (37); positioning rods (39) are slidably installed in each of the second movable grooves (40); a second spring (38) is fixedly connected between the opposite side of the two positioning rods (39) of the same group and the inner wall of one side of the second movable groove (40) of the same group; a positioning slot matching the positioning rod (39) of the same group is provided on the side wall of the plug block (36); two symmetrically distributed rubber rods are fixedly installed at the bottom end of the sleeve (32); and a receiving groove matching the rubber rod of the same group is provided on the top end of the support ring (33).

7. The device for rapidly improving the purity of nitrogen produced by pressure swing adsorption during startup according to claim 6 is characterized in that: Two symmetrically distributed stabilizing blocks are fixedly mounted on the side walls at opposite ends of the two positioning rods (39) in the same group, and a stabilizing groove matching the stabilizing blocks in the same group is formed on the inner wall of the second movable groove (40).

8. The device for rapidly improving the purity of nitrogen produced by pressure swing adsorption according to claim 1 is characterized in that: A mounting ring (34) is fixedly mounted inside the return pipe (20), and a flow guide fan (35) is arranged inside the mounting ring (34).

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