Waste gas recovery device of nitrogen making machine

Abstract

The invention discloses a nitrogen making machine waste gas recovery device, and relates to the technical field of nitrogen making machines, the nitrogen making machine waste gas recovery device comprises: a ventilation mechanism, the ventilation mechanism comprises a cylinder body mixing liquid accumulation cylinder; a demisting mechanism is mounted in the barrel and comprises a demister, a supporting beam, a middle shaft, a bracket and a gear; a lifting mechanism is mounted in the barrel and comprises a large floating plate, a lifting rod and a rack; and an oil removing mechanism is mounted on the middle shaft and comprises a sleeve, a toothed plate, a transverse frame, a baffle, a stand column, a mother plate, a connecting block and a daughter plate. The demister has the advantages that oil drops on the blades of the demister are removed by utilizing buoyancy of recycled water mist or oil mist, and the water mist and oil mist removing performance of the demister is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen generators, and more particularly to a waste gas recovery device for a nitrogen generator. Background Art

[0002] The nitriding process is essential in many industrial fields, including chemistry, metallurgy, glass, ceramics and metal processing. However, the waste gas generated in this process will have a serious impact on the environment and workers' health if it is not properly treated.

[0003] The waste gas generated during the nitridation process is mainly oxygen-rich gas, which has many uses, such as being used as combustion-supporting gas in industrial heating equipment such as boilers, in the oxygenation process in activated sludge method or other biochemical treatment processes, in greenhouse planting, etc. The waste gas (oxygen-rich gas) in the nitridation process needs to be treated by a gas purification tower (such as an adsorption tower, a washing tower, etc.) before it can be reused. Before the waste gas enters the gas purification tower, it needs to be treated by a demister to remove water mist and oil mist in the gas, ensuring that the waste gas purification process will not be disturbed by droplets.

[0004] The demister separates liquid droplets or solid particles from the air flow through mechanical separation, inertial collision, gravity sedimentation and other methods. It is often used to remove water mist, oil mist or other liquid droplets from the gas. The oil mist in the exhaust gas may adhere to the demister due to the viscosity of the oil, which may cause the performance of the demister to deteriorate or even become clogged. In addition, the demister on the gas purification tower is difficult to be cleaned in time, which can easily affect the efficiency and effect of exhaust gas treatment. Therefore, it is necessary to propose a nitrogen generator exhaust gas recovery device to solve the above problems. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a nitrogen generator waste gas recovery device, which can solve the problem that when the demister treats the waste gas in the nitrogen making process of the existing nitrogen generator, the oil mist is easy to condense and adhere to the demister blades, resulting in the deterioration of the demister performance or blockage. It has the advantage of using the buoyancy of the recovered water mist or oil mist to remove the oil droplets on the demister blades, thereby ensuring the performance of the demister in removing water mist and oil mist.

[0006] To solve the above problems, the present invention adopts the following technical solutions:

[0007] A nitrogen generator waste gas recovery device comprises a ventilation mechanism, wherein the ventilation mechanism comprises a cylinder, and a liquid storage cylinder is arranged at the inner bottom end of the cylinder;

[0008] A defogger mechanism is installed inside the cylinder, and the defogger mechanism includes a defogger installed inside the cylinder, a support beam is fixed inside the defogger, a central axis is arranged on the top of the support beam, two brackets are symmetrically installed on the top surface of the support beam, and a gear is rotatably connected to each bracket;

[0009] A lifting mechanism is installed inside the cylinder, and the lifting mechanism includes a large floating plate slidably connected to the inside of the liquid collection cylinder, a lifting rod is installed on the top of the large floating plate, and the lifting rod is slidably connected to the top of the liquid collection cylinder, and two racks are symmetrically installed on the top of the lifting rod, and the two racks pass through the support beam and are respectively meshed with the corresponding gears;

[0010] An oil removal mechanism is installed on the central axis, and the oil removal mechanism includes a sleeve sleeved on the outside of the central axis, two tooth plates are symmetrically arranged on the outside of the sleeve, and the tooth plates are meshed and connected with the corresponding gears, and two cross frames are symmetrically fixed to the outside of the sleeve, a baffle is installed on the bottom surface of the cross frame, and a number of columns are equidistantly installed on the bottom surface of the baffle, a mother plate is installed at the bottom end of the column, and a number of connecting blocks are rotatably connected on both sides of the mother plate, and sub-plates are fixed to the ends of the several connecting blocks on each side of the mother plate.

[0011] As a preferred solution of the present invention, the ventilation mechanism also includes a liquid discharge port arranged at the bottom of the cylinder, an air inlet is arranged on the side of the bottom end of the cylinder, an air outlet is arranged on the top of the cylinder, a cross beam is installed at the upper end of the cylinder, a plurality of resistance plates are fixed at equal distances at the bottom of the cross beam, and the resistance plates are slidably connected to the side walls of the cross frame.

[0012] As a preferred solution of the present invention, the lifting mechanism also includes a plurality of shifting teeth equidistantly fixed on the outside of the rack, a hook arm is installed on the top of each shifting tooth, a limiting groove is provided on the side wall of the lifting rod, a locking rod is slidably connected to the top of the liquid accumulation cylinder, a through groove is penetrated through the locking rod, a sliding column is slidably connected in the through groove, two abutting rods are fixed on both sides of the sliding column, and the abutting rods abut the side walls of the through groove, and a small floating plate is installed on the top of the sliding column.

[0013] As a preferred solution of the present invention, the oil removal mechanism further includes a first spring and a slide bar installed inside the cross frame, the slide bar is elastically connected to the inside of the cross frame through the first spring, and the baffle is installed at the bottom of the slide bar.

[0014] As a preferred solution of the present invention, a folding mechanism is installed on the column, and the folding mechanism includes a shell arranged on the column, a lever is rotatably connected inside the shell, a pressure rod is fixed to the side surface of one end of the lever, and a connecting rod is rotatably connected to the other end of the lever, a telescopic rod and a second spring are installed in the shell, the telescopic rod is elastically connected to the inside of the shell through the second spring, a circular plate is installed at the inner end of the telescopic rod, a slide cylinder is slidably connected to the outside of the bottom end of the column, the bottom end of the connecting rod is rotatably connected to the side surface of the slide cylinder, the bottom end of the slide cylinder is symmetrically rotatably connected to pulling arms on both sides, and the bottom ends of the pulling arms are respectively rotatably connected to the corresponding sub-plates, an inner rod is installed on the top of the slide cylinder, the inner rod slides inside the column, and the circular plate contacts the top end of the inner rod, a third spring is installed outside the inner rod, and the inner rod is elastically connected to the inside of the column through the third spring.

[0015] As a preferred embodiment of the present invention, a steam injection mechanism is installed on the top surface of the support beam, and the steam injection mechanism includes two support frames symmetrically installed on the top surface of the support beam, a torsion spring and a pipe are installed on the top of the support frame, and the pipe is elastically connected to the top of the support frame through the torsion spring, and a plurality of nozzles are equidistantly installed on the bottom surface of the pipe, and a through pipe is installed on the top of the pipe, and the top of the through pipe is connected to a steam pipe, a triangular block and a fourth spring are installed inside the through pipe, and the triangular block is elastically connected to the through pipe through the fourth spring, and a closing disk is installed inside the through pipe, and the closing disk is installed at the bottom of the triangular block, and a shifting frame is installed on the side of the pipe, and the shifting frame abuts against a plurality of the shifting teeth.

[0016] As a preferred solution of the present invention, a shaking mechanism is installed at the bottom of the support beam, and the shaking mechanism includes two shells symmetrically installed on the bottom surface of the support beam, a fifth spring and a slider are installed inside the shell, and the slider is elastically connected to the inside of the shell through the fifth spring, a long rod is installed on the side of the slider, a plurality of shifting blocks are equidistantly fixed on the top surface of the long rod, a collision block is installed on the side of the long rod, and the collision block abuts against a plurality of the shifting teeth.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. Remove the oil mist and water mist from the exhaust gas through the demister and collect them at the bottom of the cylinder. When the collected liquid reaches a certain height, the buoyancy of the collected liquid is used to slide the lock rod and release the lock on the lifting rod, so as to achieve the effect of timing the start of the large floating plate; similarly, the buoyancy of the liquid is used to make the large floating plate drive the lifting rod and the rack to rise, so that the oil removal mechanism is driven downward by the gear, and then the surface of the corrugated blades in the demister is scraped through the sub-plate to automatically remove the oil stains. A folding mechanism is also installed on the column. When the oil removal mechanism scrapes the oil from the blades in the demister, the circular plate can prevent the inner rod from sliding, thereby fixing the slide cylinder, and preventing the sub-plate from rotating, ensuring the scraping function of the sub-plate; when the oil removal mechanism is reset, the resistance plate inside the cylinder pushes the pressure rod and the telescopic rod, and finally folds the sub-plate into a "V" shape, thereby reducing the obstruction to the gap between the blades in the demister and making the exhaust gas flow more smoothly.

[0019] 2. By raising the rack, not only can the opening of the through pipe be controlled, so that the external high-temperature steam can be sprayed into the demister through the nozzle on the pipe, the blades can be steam-heated, and stubborn stains can be loosened, making it easier to scrape oil off the sub-plate and improving the cleaning efficiency, but the rack also drives the shifting teeth to rise, and the pipe can be driven to swing by shifting the shifting frame, so that the spraying range of the high-temperature steam can be increased, so that more blades can be heated and the heating effect can be improved.

[0020] 3. Similarly, the rise of the rack is used to drive the shifting teeth to contact the collision block, so that the long rod vibrates regularly, driving the shifting block to touch each blade in the demister, causing the blade to vibrate, and cooperating with the sub-plate, the sub-plate is pushed downward to shake off the oil mist and water stains that have been scraped off, so that impurities can drip quickly and thoroughly, further improving the cleaning efficiency of the water mist and oil mist on the blades in the demister. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall cutaway structure of the present invention;

[0023] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 It is a schematic diagram of the lifting mechanism structure of the present invention;

[0025] Figure 5 It is a partial structural schematic diagram of the lifting mechanism of the present invention;

[0026] Figure 6 It is a partial cutaway structural schematic diagram of the demisting mechanism of the present invention;

[0027] Figure 7It is a schematic diagram of the coordination structure of the lifting mechanism and the oil removal mechanism of the present invention;

[0028] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0029] Fig. 9 It is a schematic diagram of the folding mechanism structure of the present invention;

[0030] Fig.10 For the present invention Fig. 9 The enlarged structural diagram at C in the middle;

[0031] Fig.11 It is a schematic diagram of the coordination structure of the lifting mechanism and the steam injection mechanism of the present invention;

[0032] Fig.12 It is a schematic diagram of the structure of the steam injection mechanism of the present invention;

[0033] Fig.13 It is a schematic diagram of the coordination structure of the lifting mechanism and the shaking mechanism of the present invention.

[0034] Description of the numbers in the figure:

[0035] 1. Ventilation mechanism; 11. Cylinder; 12. Drain port; 13. Air inlet; 14. Air outlet; 15. Liquid accumulation cylinder; 16. Crossbeam; 17. Contact plate; 2. Demisting mechanism; 21. Demister; 22. Support beam; 23. Central axis; 24. Bracket; 25. Gear; 3. Lifting mechanism; 31. Large floating plate; 32. Lifting rod; 33. Rack; 34. Gear; 35. Hook arm; 36. Limiting groove; 37. Lock rod; 38. Through groove; 39. Sliding column; 391. Contact rod; 392. Small floating plate; 4. Oil removal mechanism; 41. Sleeve; 42. Tooth plate; 43. Crossbeam; 44. First spring; 45. Sliding bar; 46. Baffle; 47. Column; 48, motherboard; 49, connecting block; 491, sub-board; 5, folding mechanism; 51, shell; 52, lever; 53, pressure rod; 54, telescopic rod; 55, second spring; 56, circular plate; 57, slide; 58, connecting rod; 59, pulling arm; 591, inner rod; 592, third spring; 6, steam injection mechanism; 61, support frame; 62, torsion spring; 63, pipeline; 64, nozzle; 65, through pipe; 66, steam pipe; 67, triangular block; 68, fourth spring; 69, closing disk; 691, shifting frame; 7, shaking mechanism; 71, shell; 72, fifth spring; 73, slider; 74, long rod; 75, shifting block; 76, collision block. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] For example, see Figures 1 to 13 As shown, the present invention discloses a nitrogen generator waste gas recovery device, comprising a ventilation mechanism 1, the ventilation mechanism 1 comprises a cylinder 11, and a liquid storage cylinder 15 is arranged at the inner bottom end of the cylinder 11;

[0038] A defogger mechanism 2 is installed inside the cylinder 11, and the defogger mechanism 2 includes a defogger 21 installed inside the cylinder 11, a support beam 22 is fixed inside the defogger 21, a central axis 23 is arranged on the top of the support beam 22, two brackets 24 are symmetrically installed on the top surface of the support beam 22, and a gear 25 is rotatably connected to each bracket 24;

[0039] A lifting mechanism 3 is installed inside the cylinder 11. The lifting mechanism 3 includes a large floating plate 31 slidably connected to the inside of the liquid collection cylinder 15. A lifting rod 32 is installed on the top of the large floating plate 31. The lifting rod 32 is slidably connected to the top of the liquid collection cylinder 15. Two racks 33 are symmetrically installed on the top of the lifting rod 32. The two racks 33 penetrate the support beam 22 and are respectively meshed with corresponding gears 25.

[0040] An oil removal mechanism 4 is installed on the central shaft 23, and the oil removal mechanism 4 includes a sleeve 41 which is sleeved on the outside of the central shaft 23, and two tooth plates 42 are symmetrically arranged on the outside of the sleeve 41, and the tooth plates 42 are meshed and connected with the corresponding gears 25. Two cross frames 43 are also symmetrically fixed to the outside of the sleeve 41, and a baffle 46 is installed on the bottom surface of the cross frame 43. A number of columns 47 are equidistantly installed on the bottom surface of the baffle 46, and a mother plate 48 is installed at the bottom end of the column 47. A number of connecting blocks 49 are rotatably connected on both sides of the mother plate 48, and sub-plates 491 are fixed to the ends of the several connecting blocks 49 on each side of the mother plate 48.

[0041] The waste gas generated during the nitrogen production process of the nitrogen generator enters the cylinder 11 through the air inlet 13, passes through the demister 21 from bottom to top, and is finally discharged from the air outlet 14. A plurality of parallel corrugated blades are arranged inside the demister 21. When the waste gas containing water mist or oil mist passes through the corrugated blades in the demister 21, the waste gas flows along the channel formed by the corrugated blades, while the larger oil mist particles cannot turn with the air flow due to their large inertia, and will directly hit the surface of the corrugated blades and adhere to them, and finally converge to form droplets (water or oil), which drip to the bottom of the cylinder 11 under the action of gravity.

[0042] When the dripping liquid reaches a certain amount, it fills the liquid collection cylinder 15 at the bottom of the cylinder 11. The buoyancy of the liquid is used to make the large floating plate 31 in the liquid collection cylinder 15 float up, driving the lifting rod 32 to move upward (according to the attached Figure 2 The lifting rod 32 drives the rack 33 to rise, thereby driving the sleeve 41 slidably connected to the central axis 23 to descend through the gear 25 on the top of the support beam 22, and the sleeve 41 drives the cross frame 43 to descend. The cross frame 43 drives a number of columns 47 to descend through the baffle 46, and the mother plate 48 at the bottom of the column 47 drives the sub-plate 491 to descend. The sub-plates 491 are respectively opposite to the surfaces of the corresponding corrugated blades. The oil and water droplets attached to the corrugated blades of the demister 21 are scraped off by the scraping of the sub-plate 491, thereby achieving the purpose of quickly cleaning the demister 21. In actual use, the defogger 21 has narrow gaps between the blades and many dead corners, which makes it difficult for workers to clean it, which is time-consuming and laborious. In addition, the entire exhaust gas treatment equipment needs to be shut down before cleaning, which will affect the efficiency of the entire exhaust gas treatment. Compared with the prior art, the present invention collects the buoyancy after collecting a sufficient amount of liquid, thereby driving the oil removal mechanism 4 to clean the oil and other impurities in the defogger 21, which not only has the effect of regular cleaning, but also can achieve automatic cleaning without human intervention, and there is no need to shut down the entire exhaust gas treatment equipment, thereby greatly reducing the tediousness of manual cleaning and improving the defogger performance and service life of the defogger 21.

[0043] Example 2: This example is an explanation based on Example 1. For details, please refer to Figures 1 to 13 The ventilation mechanism 1 also includes a liquid discharge port 12 arranged at the bottom of the cylinder 11, an air inlet 13 is arranged on the bottom side of the cylinder 11, an air outlet 14 is arranged on the top of the cylinder 11, a cross beam 16 is installed at the upper end of the cylinder 11, and a plurality of abutment plates 17 are fixed at equal distances at the bottom of the cross beam 16, and the abutment plates 17 are slidably connected to the side walls of the cross frame 43.

[0044] The lifting mechanism 3 also includes a plurality of shifting teeth 34 equidistantly fixed on the outside of the rack 33, a hook arm 35 is installed on the top of each shifting tooth 34, a limiting groove 36 is provided on the side wall of the lifting rod 32, a locking rod 37 is slidably connected to the top of the liquid collection cylinder 15, a through groove 38 is penetrated on the locking rod 37, a sliding column 39 is slidably connected in the through groove 38, two abutting rods 391 are fixed on both sides of the sliding column 39, and the abutting rods 391 abut against the side walls of the through groove 38, and a small floating plate 392 is installed on the top of the sliding column 39.

[0045] The oil removal mechanism 4 further includes a first spring 44 and a slide bar 45 installed inside the cross frame 43 . The slide bar 45 is elastically connected to the inside of the cross frame 43 through the first spring 44 , and a baffle 46 is installed at the bottom of the slide bar 45 .

[0046] A steam injection mechanism 6 is installed on the top surface of the support beam 22, and the steam injection mechanism 6 includes two support frames 61 symmetrically installed on the top surface of the support beam 22, a torsion spring 62 and a pipe 63 are installed on the top of the support frame 61, the pipe 63 is elastically connected to the top of the support frame 61 through the torsion spring 62, a plurality of nozzles 64 are equidistantly installed on the bottom surface of the pipe 63, a through pipe 65 is installed on the top of the pipe 63, the top of the through pipe 65 is connected to the steam pipe 66, a triangular block 67 and a fourth spring 68 are installed inside the through pipe 65, the triangular block 67 is elastically connected to the through pipe 65 through the fourth spring 68, a closing disk 69 is installed inside the through pipe 65, and the closing disk 69 is installed at the bottom of the triangular block 67, a shifting frame 691 is installed on the side of the pipe 63, and the shifting frame 691 abuts against a plurality of shifting teeth 34.

[0047] In order to ensure that the lifting mechanism 3 can rise regularly (due to the different exhaust gas flow rates and flow rates in the cylinder 11, or the different amounts of liquid in the exhaust gas filtered by the demister 21, the time to collect the same volume of liquid each time will be different, but the approximate time difference is not large, therefore, using the buoyancy of the liquid to allow the small float 392 to drive the locking rod 37 to release the lock on the lifting rod 32 can be regarded as having a timing effect), so that the oil removal mechanism 4 can achieve the effect of cleaning the demister 21 regularly and can make full use of the buoyancy of the collected liquid, a locking rod 37 is provided on the top of the liquid collection cylinder 15 to limit the rise of the lifting rod 32. In the initial state, the sliding column 39 drops to the lowest position due to gravity, and its right side push rod 391 pushes against the side of the through groove 38 (as shown in the attached Figure 5 The side walls of the through groove 38 are inclined surfaces with opposite inclination directions, and the resistance rod 391 against the side of the through groove 38 can cause the locking rod 37 to slide left and right at the top of the liquid accumulation cylinder 15), so that the end of the locking rod 37 is inserted into the limit groove 36, and the lifting rod 32 cannot slide, thereby limiting the sliding of the large floating plate 31. When the bottom of the cylinder 11 or the liquid surface inside the liquid storage cylinder 15 contacts the small float 392, the buoyancy of the liquid causes the small float 392 to rise, and the small float 392 drives the slide column 39 to rise, and its right side support rod 391 no longer contacts the right side of the through groove 38. Instead, the support rod 391 on the left side of the slide column 39 begins to contact the left side of the through groove 38, thereby driving the locking rod 37 to slide to the left, and the end of the locking rod 37 slides out of the limit groove 36, thereby releasing the lock of the lifting rod 32. Under the action of the buoyancy of the liquid, the large float 31 drives the lifting rod 32 and the rack 33 to rise, and finally realizes automatic start, and drives the oil removal mechanism 4 to descend through the gear 25 to clean the oil stains in the demister 21.

[0048] In order to improve the effect of scraping off oil by the sub-plate 491, and after the demister 21 is used for a long time, the oil on the corrugated blades may be more viscous and have stronger adhesion, and it is difficult to effectively remove the oil by scraping by the sub-plate 491 alone. Therefore, in the initial state, the hook arm 35 at the top of the rack 33 contacts the triangular block 67 at the top of the through-tube 65, so that the closing disk 69 closes the steam pipe 66, and the external high-temperature steam cannot enter the pipe 63 through the steam pipe 66. At the same time, the fourth spring 68 is stretched by the triangular block 67. When the rack 33 rises, the hook arm 35 rises synchronously and immediately releases the triangular block 67. Under the elastic force of the fourth spring 68, the triangular block 67 drives the closing disk 69 to slide inside the through-tube 65, so that the closing disk 69 no longer blocks the steam pipe 66. The external high-temperature steam enters the pipe 63 through the steam pipe 66 and is sprayed from each nozzle 64 to heat the blades in the demister 21.

[0049] As the rack 33 continues to rise, the several teeth 34 distributed on its surface begin to push the push rack 691 in turn. The push rack 691 drives the pipe 63 to swing on the top of the support frame 61. The pipe 63 drives the torsion spring 62 inside the support frame 61 to store force, and at the same time drives the nozzle 64 to swing, which can increase the coverage of high-temperature steam, so that more blades can be heated, and improve the heating effect and degreasing effect.

[0050] After a certain amount of liquid is collected inside the cylinder 11, the liquid can be discharged by opening the valve at the bottom of the discharge port 12. When the liquid is lost, the buoyancy disappears, and the lifting mechanism 3 automatically resets, thereby driving the oil removal mechanism 4, the steam injection mechanism 6 and the shaking mechanism 7 to reset.

[0051] Example 3: This example is an explanation based on Example 1. For details, please refer to Figures 1 to 13 A folding mechanism 5 is installed on the column 47. The folding mechanism 5 includes a shell 51 arranged on the column 47. A lever 52 is rotatably connected to the inside of the shell 51. A pressure rod 53 is fixed to the side of one end of the lever 52. A connecting rod 58 is rotatably connected to the other end of the lever 52. A telescopic rod 54 and a second spring 55 are installed in the shell 51. The telescopic rod 54 is elastically connected to the inside of the shell 51 through the second spring 55. A circular plate 56 is installed at the inner end of the telescopic rod 54. The bottom end of the column 47 is externally slidably connected to the outside. It is connected to a slide 57, the bottom end of the connecting rod 58 is rotatably connected to the side of the slide 57, the bottom end of the slide 57 is symmetrically rotatably connected to the pull arms 59 on both sides, and the bottom ends of the pull arms 59 are rotatably connected to the corresponding sub-plates 491, an inner rod 591 is installed on the top of the slide 57, the inner rod 591 slides inside the column 47, and the circular plate 56 abuts against the top of the inner rod 591, a third spring 592 is installed outside the inner rod 591, and the inner rod 591 is elastically connected to the inside of the column 47 through the third spring 592.

[0052] A shaking mechanism 7 is installed at the bottom of the support beam 22, and the shaking mechanism 7 includes two shells 71 symmetrically installed on the bottom surface of the support beam 22, and a fifth spring 72 and a slider 73 are installed inside the shell 71. The slider 73 is elastically connected to the inside of the shell 71 through the fifth spring 72. A long rod 74 is installed on the side of the slider 73, and a plurality of shifting blocks 75 are equidistantly fixed on the top surface of the long rod 74. A collision block 76 is installed on the side of the long rod 74, and the collision block 76 abuts against a plurality of shifting teeth 34.

[0053] During the normal operation of the demister 21, the oil removal mechanism 4 is suspended at the top of the demister 21. In order for the sub-plate 491 not to hinder the gas circulation efficiency, a folding mechanism 5 is installed on the column 47. When the oil removal mechanism 4 is normally scraping off the oil stains on the blades in the demister 21, the elastic force of the second spring 55 causes the telescopic rod 54 to have a tendency to move inside the column 47, thereby driving the circular plate 56 inside the column 47 (a cavity is provided inside the column 47 for the inner rod 591 to slide, and the circular plate 56 is in the cavity), and resists the top of the inner rod 591, so that the inner rod 591 cannot rise, thereby controlling the slide 57 to be unable to move, and then supporting the sub-plate 491 through the pull arm 59, so that the sub-plate 491 will not drive the connecting block 49 and the mother plate 48 to rotate. In the process of scraping off the oil stains on the blade surface in the demister 21, the sub-plate 491 can effectively scrape the blade surface.

[0054] When the oil removal mechanism 4 has finished scraping and returned to its initial position, the plurality of abutment plates 17 below the cross beam 16 in the cylinder 11 will simultaneously abut the pressure rod 53 and the outer end of the telescopic rod 54 (a wedge is provided at the outer end of the telescopic rod 54), prompting the telescopic rod 54 to drive the circular plate 56 to slide to the outside of the outer shell 51 and compress the second spring 55, so that the circular plate 56 no longer blocks the sliding of the inner rod 591 inside the column 47; at the same time, the abutment plate 17 drives the lever 52 to swing inside the outer shell 51 by pushing the pressure rod 53 downward (the lever 52 is arranged as a square frame structure at the rotation position inside the outer shell 51 to prevent the inner rod 591 from sliding), and the other end of the lever 52 drives the slide 57 to rise through the connecting rod 58, and the slide 57 then pulls the sub-plate 491 through the pulling arm 59, and the sub-plate 491 rotates relative to the mother plate 48 through the connecting block 49, and the sub-plate 491 folds into a "V" shape, thereby reducing the obstruction to the gap between the blades in the demister 21 and allowing the gas to flow more smoothly.

[0055] The rack 33 is used to drive the shifting tooth 34 to rise, and the impact block 76 at the bottom of the support beam 22 can be regularly moved. The impact block 76 drives the long rod 74 to slide horizontally. The long rod 74 drives the slider 73 to slide in the shell 71 and compresses the fifth spring 72. At the same time, the long rod 74 hits each blade in the defogger 21 through the several shifting blocks 75 on its top, thereby driving the blade to vibrate, and cooperating with the sub-plate 491, the sub-plate 491 is pushed downward to shake off the oil mist and water stains that have been scraped away, so that impurities can drip quickly and thoroughly, further improving the cleaning efficiency of the water mist and oil mist on the blades in the defogger 21.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A nitrogen generator waste gas recovery device, comprising a ventilation mechanism (1), characterized in that: The ventilation mechanism (1) comprises a cylinder (11), and a liquid collection cylinder (15) is provided at the inner bottom end of the cylinder (11); A demisting mechanism (2) is installed inside the cylinder (11), the demisting mechanism (2) comprising a demisting device (21) installed inside the cylinder (11), a support beam (22) is fixed inside the demisting device (21), a central axis (23) is arranged on the top of the support beam (22), two brackets (24) are symmetrically installed on the top surface of the support beam (22), and each of the brackets (24) is rotatably connected to a gear (25); A lifting mechanism (3) is installed inside the cylinder (11), and the lifting mechanism (3) comprises a large floating plate (31) slidably connected to the inside of the liquid collection cylinder (15), a lifting rod (32) is installed on the top of the large floating plate (31), and the lifting rod (32) is slidably connected to the top of the liquid collection cylinder (15), and two racks (33) are symmetrically installed on the top of the lifting rod (32), and the two racks (33) pass through the support beam (22) and are respectively meshed and connected with the corresponding gears (25); An oil removal mechanism (4) is mounted on the central shaft (23). The oil removal mechanism (4) comprises a sleeve (41) sleeved on the outside of the central shaft (23). Two tooth plates (42) are symmetrically arranged on the outside of the sleeve (41), and the tooth plates (42) are meshedly connected with the corresponding gears (25). Two cross frames (43) are also symmetrically fixed on the outside of the sleeve (41). A baffle (46) is mounted on the bottom surface of the cross frame (43). A plurality of columns (47) are equidistantly mounted on the bottom surface of the baffle (46). A motherboard (48) is mounted on the bottom end of the column (47). A plurality of connecting blocks (49) are rotatably connected to both sides of the motherboard (48). Sub-plates (491) are fixed to the ends of the plurality of connecting blocks (49) on each side of the motherboard (48).

2. The nitrogen generator waste gas recovery device according to claim 1, characterized in that: The ventilation mechanism (1) further comprises a liquid discharge port (12) arranged at the bottom of the cylinder (11); an air inlet (13) is arranged at the side of the bottom end of the cylinder (11); an air outlet (14) is arranged at the top end of the cylinder (11); a crossbeam (16) is installed at the upper end of the cylinder (11); a plurality of abutment plates (17) are fixed at equal intervals at the bottom of the crossbeam (16); and the abutment plates (17) are slidably connected to the side walls of the cross frame (43).

3. The nitrogen generator waste gas recovery device according to claim 1, characterized in that: The lifting mechanism (3) further comprises a plurality of shifting teeth (34) equidistantly fixed to the outside of the rack (33), a hook arm (35) being mounted on the top of each shifting tooth (34), a limiting groove (36) being mounted on the side wall of the lifting rod (32), a locking rod (37) being slidably connected to the top of the liquid storage cylinder (15), a through groove (38) being penetrated through the locking rod (37), a sliding column (39) being slidably connected in the through groove (38), two abutting rods (391) being fixed on both sides of the sliding column (39), the abutting rods (391) abutting against the side wall of the through groove (38), and a small floating plate (392) being mounted on the top of the sliding column (39).

4. The nitrogen generator waste gas recovery device according to claim 1, characterized in that: The oil removal mechanism (4) further comprises a first spring (44) and a slide bar (45) installed inside the cross frame (43); the slide bar (45) is elastically connected to the inside of the cross frame (43) via the first spring (44), and the baffle (46) is installed at the bottom of the slide bar (45).

5. The nitrogen generator waste gas recovery device according to claim 1, characterized in that: A folding mechanism (5) is installed on the column (47). The folding mechanism (5) comprises a shell (51) arranged on the column (47). A lever (52) is rotatably connected to the inside of the shell (51). A pressure rod (53) is fixed to the side surface of one end of the lever (52). The other end of the lever (52) is rotatably connected to a connecting rod (58). A telescopic rod (54) and a second spring (55) are installed in the shell (51). The telescopic rod (54) is elastically connected to the inside of the shell (51) via the second spring (55). A circular plate (56) is installed at the inner end of the telescopic rod (54). The bottom end of the column (47) is externally slidably connected to the outside. A slide cylinder (57) is connected, the bottom end of the connecting rod (58) is rotatably connected to the side of the slide cylinder (57), and the bottom ends of the pulling arms (59) are symmetrically rotatably connected to the pull arms (59) on both sides of the bottom end of the slide cylinder (57), and the bottom ends of the pulling arms (59) are respectively rotatably connected to the corresponding sub-plates (491), and an inner rod (591) is installed on the top of the slide cylinder (57), and the inner rod (591) slides inside the column (47), and the circular plate (56) abuts against the top end of the inner rod (591), and a third spring (592) is installed outside the inner rod (591), and the inner rod (591) is elastically connected to the inside of the column (47) through the third spring (592).

6. The nitrogen generator waste gas recovery device according to claim 3, characterized in that: A steam injection mechanism (6) is installed on the top surface of the support beam (22), and the steam injection mechanism (6) comprises two support frames (61) symmetrically installed on the top surface of the support beam (22), a torsion spring (62) and a pipe (63) are installed on the top of the support frame (61), the pipe (63) is elastically connected to the top of the support frame (61) through the torsion spring (62), a plurality of nozzles (64) are installed at equal intervals on the bottom surface of the pipe (63), a through pipe (65) is installed on the top of the pipe (63), and the through pipe The top of the through pipe (65) is connected to a steam pipe (66), a triangular block (67) and a fourth spring (68) are installed inside the through pipe (65), the triangular block (67) is elastically connected to the through pipe (65) through the fourth spring (68), a closing disk (69) is installed inside the through pipe (65), and the closing disk (69) is installed on the bottom of the triangular block (67), a shifting frame (691) is installed on the side of the pipeline (63), and the shifting frame (691) abuts against a plurality of the shifting teeth (34).

7. The nitrogen generator waste gas recovery device according to claim 6, characterized in that: A shaking mechanism (7) is installed at the bottom of the support beam (22), and the shaking mechanism (7) comprises two shells (71) symmetrically installed on the bottom surface of the support beam (22), a fifth spring (72) and a slider (73) are installed inside the shell (71), and the slider (73) is elastically connected to the inside of the shell (71) through the fifth spring (72), a long rod (74) is installed on the side of the slider (73), a plurality of shifting blocks (75) are equidistantly fixed on the top surface of the long rod (74), and a collision block (76) is installed on the side of the long rod (74), and the collision block (76) abuts against a plurality of the shifting teeth (34).

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