Maltodextrin tail wind dust removal device and dust removal method

Abstract

The present invention relates to the field of maltodextrin tail wind treatment, and discloses a maltodextrin tail wind dust removal device and a dust removal method. The problem to be solved by the present invention is that when the tail gas of the existing maltodextrin is discharged during the processing, a spraying method is used to remove impurities in the tail gas, and the tail gas after dust removal still contains a part of impurities, and the dust removal process will cause the filter to contain impurities, and the impurities on the filter need to be cleaned regularly, which affects the efficiency of tail gas emission. The present invention sucks gas into the secondary filter cartridge through the discharge device and the air inlet valve, and then the gas is sprayed to allow dust impurities to remain in the water in the secondary filter cartridge and on the filter, and then the discharge device squeezes the control device after discharging the gas, so that after the gas is discharged, the reciprocating device can open the drain valve to discharge the filtered water.

Description

Technical Field

[0001] The invention relates to the field of maltodextrin tail wind treatment, and in particular to a maltodextrin tail wind dust removal device and a dust removal method. Background Art

[0002] The problem of smog is gaining increasing attention across society. In the corn processing industry, for example, in the production of starch, maltodextrin, and other products, the dry airflow and product are typically separated using only a single cyclone separator. While this separation efficiency reaches 99%, it still struggles to meet increasingly stringent environmental requirements.

[0003] An existing patent (publication number: CN207838617U) discloses a maltodextrin spray drying powder collection system based on a thermophoretic dust collector and a sieve plate tower. The system comprises a thermophoretic dust collector, a sieve plate tower, and a mist eliminator. The upper end of the thermophoretic dust collector is connected to the dextrin spray drying exhaust inlet, and the lower end is connected to the sieve plate tower. A mist eliminator is located at the top of the sieve plate tower, and a first centrifugal fan is located at the rear end of the mist eliminator. The thermophoretic dust collector is particularly suitable for removing light dust, effectively aggregating submicron particles into millimeter-sized particles for easy removal, significantly reducing the difficulty of capturing light submicron particles. However, this prior art has at least the following unresolved issues: Exhaust gas from the maltodextrin processing process is dedusted using a spray method. However, the exhaust gas still contains some impurities after dust removal. Furthermore, the dust removal process can cause impurities to accumulate on the filter screen, requiring regular cleaning of the filter screen, which affects the efficiency of exhaust gas emissions. Summary of the Invention

[0004] The object of the present invention is to provide a maltodextrin tail wind dust removal device and a dust removal method to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a maltodextrin tail wind dust removal device, comprising a hollow shell, an air inlet pipe is provided on the outer wall of the hollow shell, a spray area is provided in the hollow shell, the air inlet pipe is connected to the spray area in the hollow shell, a support frame is fixedly connected to the inner wall of the hollow shell, a control chamber is formed between the support frame and the inner wall of the hollow shell, a driving device is provided in the control chamber, the driving device is rotatably matched with the hollow shell, a secondary filter cartridge is fixedly provided on the top of the support frame, a discharge device is correspondingly connected to the driving device, and the two discharge devices are respectively connected to the The inner walls of the two secondary filter cartridges are slidably matched, and spray heads are provided on the inner walls of the two secondary filter cartridges. Air intake valves are provided on the outer walls of the two secondary filter cartridges, and the air inlet end of the air intake valve is connected to the spray area. Drain valves are provided at the bottom of the two secondary filter cartridges, and a filter screen is provided at the bottom of the secondary filter cartridge above the drain valve. A drainage filter chamber is also provided in the hollow shell, and the discharge ends of the two drain valves are connected to the drainage filter chamber. An exhaust pipe for exhausting gas is provided on the control chamber. A switching device is rotatably provided on the two secondary filter cartridges, and the switching device slides with the outer wall of the secondary filter cartridge.

[0006] The transmission mechanism that this second end is connected with this second end is that this second end is connected with this second end to the transmission mechanism, and this second end is connected with this second end to the transmission mechanism, and this second end is connected with this second end to the transmission mechanism.

[0007] Preferably, the two discharge devices each include side baffles fixedly arranged on the inner wall of the sliding cylinder, a sieve column is slidably arranged in the sliding cylinder, a limiting rod is fixedly connected to the sieve column, the limiting rod slides with the inner wall of the sliding cylinder, a pressure spring is sleeved on the limiting rod, the two ends of the pressure spring are respectively connected to the bottom of the sieve column and the two side baffles, the sieve column is conically arranged, and an inclined surface in contact with the sieve column is arranged on the inner wall of the sliding cylinder, and the air intake valve is a one-way valve.

[0008] Preferably, the two switching devices both include a rotating cylinder rotatably arranged on the top of the secondary filter cylinder, a rotating gear is fixedly connected to the rotating cylinder, and a driving gear is fixedly connected to the driving rod, and the driving gear is meshed with the rotating gear. The outer wall of the rotating cylinder is provided with side strips arranged in an inclined manner, and a clamping plate is fixedly provided on the outer wall of the secondary filter cylinder, and a lower pressure rod is slidably provided in the two clamping plates, and the upper end of the lower pressure rod is rotatably provided with two limiting wheels, and the side strip on the outer wall of the rotating cylinder is located between the two limiting wheels, and the other end of the lower pressure rod is set in the direction of the drain valve, and a control device is provided between the lower pressure rod and the drain valve.

[0009] Preferably, the control device includes a card seat fixedly arranged on the outer wall of the secondary filter cartridge, a compression rod is slidably provided on the card seat, the compression rod is located below the lower pressure rod, and the lower pressure rod is telescopically arranged, a compression spring is sleeved on the compression rod, and the two ends of the compression spring are respectively connected to the compression rod and the card seat, a trigger rod is slidably provided on the compression rod, the trigger rod is slidably arranged on the card seat, a card cavity is opened on the card seat, a conical stopper is fixed on the trigger rod, the conical stopper slides with the card cavity, and a connecting spring is sleeved on the trigger rod, and the two ends of the connecting spring are respectively engaged with the conical stop The block is connected to the compression rod, and a resistance rod is also slidably provided on the card seat, one end of the resistance rod is arranged toward the card cavity, and a notch is provided on the end of the resistance rod facing the card cavity, and the notch contacts the conical stop block, and the resistance rod is also provided with an inclined end that contacts the inclined surface of the conical stop block, and a return spring is also provided on the resistance rod, and the two ends of the return spring are respectively connected to the resistance rod and the card seat, and a control rod is vertically provided on the resistance rod, and a wedge-shaped wedge block is provided on the control rod, and a wedge-shaped groove in contact with the wedge block is provided on the resistance rod, and the bottom of the trigger rod contacts the control end of the drain valve.

[0010] Preferably, a reciprocating device is also provided on the support frame, and the reciprocating device includes a reciprocating plate slidably arranged on the support frame, a fixed frame is fixedly provided on the reciprocating plate, a sliding groove is provided on the fixed frame, and a rotating block is also fixedly connected to the driving rod, and a push rod is fixedly connected to the end of the rotating block away from the driving rod, and the push rod is in contact with the sliding groove on the fixed frame, and a pressure block is fixedly provided on the fixed frame, and the pressure block is in contact with the control rod.

[0011] Preferably, the present invention further provides a maltodextrin tail wind dust removal method, which is implemented using the above-mentioned maltodextrin tail wind dust removal device, comprising the following steps:

[0012] S1: When the tail gas in maltodextrin is processed, the tail gas is sucked into the spray area in the hollow shell through the air inlet pipe. The spray area first performs a preliminary spray filtration on the inhaled tail gas, and then the first connecting block is rotated under the drive of the driving motor. The first connecting block and the second connecting block are connected by a connecting rod. Then, when the first connecting block rotates, the connecting rod can be driven to rotate the second connecting block. The connecting rod between the first connecting block and the second connecting block will swing around the axis point of the driving motor. Since the connecting frame and the extension rod can rotate relative to each other, and the ball between the extension rod and the moving rod is hinged, When the connecting frame provided on the connecting rod swings under the drive of the connecting rod, the extension rod drives the moving rod to move back and forth, and the other end of the moving rod is hingedly matched with the mounting rod. Then, when the moving rod moves back and forth, the sliding cylinder can be driven to move back and forth in the secondary filter cylinder through the mounting rod. When the connecting rod swings under the drive of the first connecting block and the second connecting block, the sliding cylinders in the two secondary filter cylinders will move in the opposite direction, so that the discharge devices on the two sliding cylinders move alternately in the opposite direction. The alternating movement of the two discharge devices can respectively collect the gas in the spray area into the secondary filter cylinder.

[0013] S2: When the sliding cylinder slides upward in the secondary filter cylinder, the sliding cylinder will drive the sieve column to move upward, and the upward movement of the sliding cylinder will drive the sieve column to move upward. Under the restriction of the pressure spring, the sieve column will fit with the inclined surface on the inner wall of the secondary filter cylinder, so that when the sliding cylinder moves upward, the air inlet valve is in an open state, and the gas in the spray area can be drawn into the secondary filter cylinder through the air inlet valve, and the gas in the secondary filter cylinder is filtered for the second time through the spray head on the secondary filter cylinder. When the sliding cylinder moves downward in the secondary filter cylinder, the air inlet valve is in a closed state when the sliding cylinder moves downward. Under the influence of the gas resistance in the secondary filter cylinder, the limit rod on the sieve column squeezes the pressure spring, so that the sieve column is separated from the inclined surface on the inner wall of the sliding cylinder, and the gas filtered in the secondary filter cylinder can be discharged outward;

[0014] When the second gear is in the air, the second gear is in the air, and the second gear is in the air, so that the two gears in the air can be driven by the second gear to rotate. When the gear is in the air, the second gear is in the air, and the two gears in the air can be driven by the second gear to rotate. When the gear is in the air, the second gear is in the air, and the two gears in the air can be driven by the second gear to rotate. When the gear is in the air, the second gear is in the air, and the two gears in the air can be driven by the second gear to rotate.

[0015] S4: When the gas enters the secondary filter cartridge, the air inlet valve is closed during the downward movement of the sliding cylinder, and the gas can be discharged from the secondary filter cartridge through the exhaust pipe at the control chamber. After the gas is discharged, there is still water in the secondary filter cartridge during the filtration process and stays at the inner bottom of the secondary filter cartridge. At this time, the sliding cylinder continues to move downward, and the pressing rod moves downward under the drive of the rotating cylinder. The pressing rod contacts the top surface of the compression rod at this time, and the continuous downward movement of the pressing rod drives the compression rod to move downward. The downward movement of the compression rod compresses the connecting spring provided between the compression rod and the trigger rod, and the conical stopper on the trigger rod is now abutted by the notch on the resistance rod, thereby making the trigger rod under pressure. When the gas in the secondary filter cartridge is discharged outward, it reaches the secondary filter cartridge. When the water storage position is inside, the driving rod drives the rotating block to rotate, and the rotating block will drive the fixed frame to move the reciprocating plate toward the control rod through the push rod and contact the control rod. After the pressure block on the fixed frame contacts the control rod, it will drive the control rod to press down, and the wedge block on the control rod will contact the wedge groove on the interference rod, thereby causing the interference rod to separate the notch from the conical stopper under the drive of the wedge groove. When the conical stopper no longer contacts the interference rod, the trigger rod will move downward rapidly under the drive of the connecting spring, and the trigger rod will contact the control end of the drain valve to open the drain valve, so that the water after gas filtration in the secondary filter cartridge can be discharged into the drain filter chamber. At this time, the flow rate of water when the drain valve is opened will flush the impurities remaining on the filter screen, thereby removing the impurities remaining on the filter screen.

[0016] S5: The downward pressure rod is telescopically set to continuously squeeze the compression rod, so that the trigger rod can continuously contact the drain valve to drain all the water in the secondary filter cartridge. When all the water is drained, the downward pressure rod moves up and separates from the compression rod, and the pressure block on the fixed frame no longer contacts the control rod. The resistance rod is reset under the drive of the reset spring, and the compression rod moves up and reset under the drive of the compression spring. The trigger rod also moves up and reset at the same time under the drive of the connecting spring. After the conical stopper on the trigger rod contacts the inclined end of the resistance rod, it moves up and contacts the notch on the resistance rod again, thereby separating the trigger rod from the drain valve and closing the drain valve, so that the two secondary filter cartridges can continuously remove dust from the gas.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, when the connecting rod swings driven by the first connecting block and the second connecting block, the sliding cylinders in the two secondary filter cylinders will move in the opposite direction, and the discharge devices on the two sliding cylinders will move alternately in the opposite direction. Through the alternating movement of the two discharge devices, the gas in the spray area can be collected into the secondary filter cylinder respectively, and the gas is filtered again through the spray heads in the two secondary filter cylinders to further filter the impurities contained in the gas.

[0019] In the present invention, under the influence of the gas resistance in the secondary filter cylinder, the limiting rod on the sieve column squeezes the pressure spring, so that the sieve column is separated from the inclined surface on the inner wall of the sliding cylinder, and the gas filtered in the secondary filter cylinder can be discharged outward, thereby realizing secondary filtration of the gas and more effectively removing impurities in the gas. Since the driving device controls the two discharge devices to move alternately in the two secondary filter cylinders, the gas in the spray area can be alternately introduced into the two secondary filter cylinders, so that the gas is continuously filtered in the two secondary filter cylinders.

[0020] In the present invention, when the sliding cylinder moves downward to discharge the gas, the pressing rod will contact the control device, and then the pressing rod will contact the control device through the downward pressure of the controlling rod, so that the controlling device will open the drain valve and discharge the water in the secondary filter cylinder after the gas is filtered. Through this setting, the frequency of the reciprocating movement of the pressing rod is the same as the frequency of the movement of the sliding cylinder, so that the pressing rod can contact the control device to discharge the water in the secondary filter cylinder.

[0021] In the present invention, the trigger rod contacts the control end of the drain valve to open the drain valve so that the water in the secondary filter cartridge that has filtered the gas can be discharged into the drain filter chamber. At this time, when the drain valve is opened, the flow rate of water will flush the impurities remaining on the filter screen, and then remove the impurities remaining on the filter screen. Through this arrangement, when the gas is undergoing dust removal treatment, the gas is first sucked into the secondary filter cartridge through the discharge device and the air intake valve. After that, the gas is sprayed to allow dust and impurities to remain in the water in the secondary filter cartridge and on the filter screen. Subsequently, the discharge device squeezes the control device after discharging the gas, so that after the gas is discharged, the drain valve can be opened under the drive of the reciprocating device to discharge the filtered water. First, the filtered water can be centrally processed, and second, the dust and impurities remaining on the filter screen can be effectively flushed, and the impurities on the filter screen are removed by the accumulated water, so that the filter screen can be self-cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a sectional view of the three-dimensional structure of the present invention;

[0024] Figure 3 It is a partial three-dimensional structural cross-sectional view of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the discharge device and the driving device of the present invention;

[0026] Figure 5 This is a sectional view of the three-dimensional structure of the secondary filter cartridge of the present invention;

[0027] Figure 6 It is a schematic diagram of a partial three-dimensional structure of the driving device of the present invention;

[0028] Figure 7 It is a sectional view of the three-dimensional structure of the discharge device of the present invention;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the driving device and the switching device of the present invention;

[0030] Figure 9 It is a schematic diagram of the three-dimensional structure of the control device of the present invention;

[0031] Figure 10 is a sectional view of the three-dimensional structure of the control device of the present invention;

[0032] Figure 11 It is a schematic diagram of the three-dimensional structure of the reciprocating device and the control device of the present invention.

[0033] In the figure: 1. Hollow shell; 11. Air inlet pipe; 12. Spray area; 13. Support frame; 14. Control chamber; 15. Secondary filter cartridge; 16. Inlet valve; 17. Drain valve; 18. Filter screen; 19. Drain filter chamber; 101. Exhaust pipe; 2. Drive device; 21. Drive motor; 22. First connecting block; 23. Drive rod; 24. Second connecting block; 25. Connecting rod; 26. Connecting frame; 27. Extension rod; 28. Sliding cylinder; 29. ​​Mounting rod; 210. Moving rod; 211. Ball; 3. Discharge device; 31. Side baffle; 32. Sieve column; 33. Limit rod; 34. Pressure spring; 3 5. Inclined surface; 4. Switching device; 41. Rotating cylinder; 42. Rotating gear; 43. Driving gear; 44. Side strip; 45. Card plate; 46. Pressing rod; 47. Limiting wheel; 5. Control device; 51. Card seat; 52. Compression rod; 53. Compression spring; 54. Trigger rod; 55. Card cavity; 56. Conical stopper; 57. Connecting spring; 58. Resistance rod; 59. Notch; 510. Inclined end; 511. Return spring; 512. Control rod; 513. Wedge block; 6. Reciprocating device; 61. Reciprocating plate; 62. Fixed frame; 63. Sliding groove; 64. Rotating block; 65. Push rod; 66. Pressing block. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] See also Figures 1 to 11The present invention provides a technical solution: a maltodextrin tail wind dust removal device, comprising a hollow shell 1, an air inlet pipe 11 is provided on the outer wall of the hollow shell 1, a spray area 12 is provided in the hollow shell 1, the air inlet pipe 11 is communicated with the spray area 12 in the hollow shell 1, a support frame 13 is fixedly connected to the inner wall of the hollow shell 1, a control chamber 14 is formed between the support frame 13 and the inner wall of the hollow shell 1, a driving device 2 is provided in the control chamber 14, the driving device 2 is rotatably matched with the hollow shell 1, a secondary filter cartridge 15 is fixedly provided on the top of the support frame 13, a discharge device 3 is correspondingly connected to the driving device 2, and the two discharge devices 3 are respectively connected to the two secondary filter cartridges 15 The inner wall of the two secondary filter cartridges 15 slides together, a spray head is provided on the inner wall of the two secondary filter cartridges 15, and an air inlet valve 16 is provided on the outer wall of the two secondary filter cartridges 15. The air inlet end of the air inlet valve 16 is connected to the spray area 12, and a drain valve 17 is provided at the bottom of the two secondary filter cartridges 15, and a filter screen 18 is provided at the bottom of the secondary filter cartridge 15 above the drain valve 17. A drainage filter chamber 19 is also provided in the hollow shell 1, and the discharge ends of the two drain valves 17 are connected to the drainage filter chamber 19. An exhaust pipe 101 for exhausting gas is provided on the control chamber 14, and a switching device 4 is rotatably provided on the two secondary filter cartridges 15, and the switching device 4 slides with the outer wall of the secondary filter cartridge 15.

[0036] In this embodiment, the driving device 2 includes a driving motor 21 fixedly connected to the top of the hollow shell 1, the main shaft of the driving motor 21 is rotatably matched with the top of the hollow shell 1, and the main shaft of the driving motor 21 extends toward the control chamber 14. A first connecting block 22 set obliquely is fixedly connected to the main shaft of the driving motor 21, and a driving rod 23 is rotatably provided on the support frame 13. A second connecting block 24 arranged opposite to the first connecting block 22 is fixedly provided on the driving rod 23. A connecting rod 25 is provided between the first connecting block 22 and the second connecting block 24. A connecting frame 26 is hingedly provided on the connecting rod 25. Extension rods 27 are respectively provided at both ends of the connecting frame 26 extending toward the direction of the two secondary filter cylinders 15. The extension rods 27 and the connecting frame 26 can rotate relative to each other. Sliding cylinders 28 are slidably provided in the two secondary filter cylinders 15. The two sliding cylinders 28 are fixedly connected with mounting rods 29. The mounting rods 29 on the two sliding cylinders 28 are hingedly provided with moving rods 210. The other end of the moving rod 210 away from the mounting rod 29 is provided with a ball 211. The balls 211 on the two moving rods 210 are respectively hingedly matched with the two extension rods 27 on the connecting frame 26, and the two discharge devices 3 are respectively provided on the two sliding cylinders 28.

[0037] When the tail gas in the maltodextrin is treated, the tail gas is sucked into the spray area 12 in the hollow shell 1 through the air inlet pipe 11. The spray area 12 first performs a preliminary spray filtration on the inhaled tail gas, and then the first connecting block 22 is rotated under the drive of the driving motor 21. The first connecting block 22 and the second connecting block 24 are connected by a connecting rod 25. Then, when the first connecting block 22 rotates, it can drive the connecting rod 25 to rotate the second connecting block 24. The connecting rod 25 between the first connecting block 22 and the second connecting block 24 will swing around the axis point of the driving motor 21. Since the extension rod 27 on the connecting frame 26 is hinged with the ball 211 between the moving rod 210, when the connecting frame 26 set on the connecting rod 25 swings under the drive of the connecting rod 25 The extension rod 27 will drive the moving rod 210 to move back and forth, and the other end of the moving rod 210 is hinged with the mounting rod 29, and then when the moving rod 210 moves back and forth, the mounting rod 29 can drive the sliding cylinder 28 to move back and forth in the secondary filter cylinder 15, and when the connecting rod 25 swings under the drive of the first connecting block 22 and the second connecting block 24, the sliding cylinders 28 in the two secondary filter cylinders 15 will move in the opposite direction, so that the discharge devices 3 on the two sliding cylinders 28 will move alternately in the opposite direction. Through the alternating movement of the two discharge devices 3, the gas in the spray area 12 can be collected respectively toward the secondary filter cylinder 15, and the gas is filtered again by the spray heads in the two secondary filter cylinders 15 to further filter the impurities contained in the gas.

[0038] In this embodiment, the two discharge devices 3 both include side baffles 31 fixedly arranged on the inner wall of the sliding cylinder 28, a sieve column 32 is slidingly arranged in the sliding cylinder 28, a limiting rod 33 is fixedly connected to the sieve column 32, the limiting rod 33 slides with the inner wall of the sliding cylinder 28, a pressure spring 34 is sleeved on the limiting rod 33, the two ends of the pressure spring 34 are respectively connected to the sieve column 32 and the bottom of the two side baffles 31, the sieve column 32 is conically arranged, and an inclined surface 35 in contact with the sieve column 32 is arranged on the inner wall of the sliding cylinder 28, and the intake valve 16 is a one-way valve.

[0039] When the sliding cylinder 28 slides upward in the secondary filter cylinder 15, the sliding cylinder 28 will drive the sieve column 32 to move upward. The upward movement of the sliding cylinder 28 drives the sieve column 32 to move upward. Under the restriction of the pressure spring 34, the sieve column 32 is fitted with the inclined surface 35 on the inner wall of the secondary filter cylinder 15, so that when the sliding cylinder 28 moves upward, the air inlet valve 16 is in the open state, and the gas in the spray area 12 can be drawn into the secondary filter cylinder 15 through the air inlet valve 16, and the gas in the secondary filter cylinder 15 is filtered for the second time through the spray head on the secondary filter cylinder 15. When the sliding cylinder 28 moves downward in the secondary filter cylinder 15, the air inlet valve 16 is opened. When the valve 16 is in a closed state, the limit rod 33 on the sieve column 32 squeezes the pressure spring 34 under the influence of the gas resistance in the secondary filter cartridge 15, so that the sieve column 32 is separated from the inclined surface 35 on the inner wall of the sliding cylinder 28, and the gas filtered in the secondary filter cartridge 15 can be discharged outward, thereby realizing secondary filtration of the gas and more effectively removing impurities in the gas. Since the driving device 2 controls the two discharge devices 3 to move alternately in the two secondary filter cartridges 15, the gas in the spray area 12 can be alternately introduced into the two secondary filter cartridges 15, so that the gas is continuously filtered in the two secondary filter cartridges 15 without interruption.

[0040] In this embodiment, the two switching devices 4 both include a rotating cylinder 41 rotatably set on the top of the secondary filter cylinder 15, a rotating gear 42 is fixedly connected to the rotating cylinder 41, and a driving gear 43 is fixedly connected to the driving rod 23, and the driving gear 43 is meshed with the rotating gear 42. The outer wall of the rotating cylinder 41 is provided with an inclined side strip 44, and the outer wall of the secondary filter cylinder 15 is fixedly provided with a clamping plate 45, and a lower pressure rod 46 is slidably provided in the two clamping plates 45. The upper end of the lower pressure rod 46 is rotatably provided with two limiting wheels 47, and the side strip 44 on the outer wall of the rotating cylinder 41 is located between the two limiting wheels 47. The other end of the lower pressure rod 46 is set in the direction of the drain valve 17, and a control device 5 is provided between the lower pressure rod 46 and the drain valve 17.

[0041] When the driving motor 21 drives the first connecting block 22 to rotate so that the second connecting block 24 drives the driving rod 23 to rotate, the driving rod 23 drives the driving gear 43 to rotate, and the rotation of the driving gear 43 can contact the rotating gears 42 on the two switching devices 4, so that the driving gear 43 can synchronously drive the two rotating gears 42 to rotate, and the rotation of the rotating gear 42 can drive the rotating cylinder 41 to rotate. When the rotating cylinder 41 rotates, the side strips 44 drive the two limiting wheels 47 to move, and the two limiting wheels 47 drive the lower pressure rod 46 to move up and down reciprocatingly. The reciprocating up and down movement of the lower pressure rod 46 is consistent with the movement frequency of the sliding cylinder 28 in the secondary filter cylinder 15. When the sliding cylinder 28 When moving upward, the lower pressure rod 46 will move upward, and when the sliding cylinder 28 moves downward to discharge the gas in the secondary filter cylinder 15 to the outside, the drain valve 17 set at the bottom of the secondary filter cylinder 15 is in a closed state. After the sliding cylinder 28 moves downward to discharge the gas, the lower pressure rod 46 will contact the control device 5, and then through the downward pressure of the lower pressure rod 46, it will contact the control device 5, causing the control device 5 to open the drain valve 17 and discharge the water in the secondary filter cylinder 15 after filtering the gas. Through this setting, the frequency of the reciprocating movement of the lower pressure rod 46 is the same as the frequency of the movement of the sliding cylinder 28, which facilitates the lower pressure rod 46 to contact the control device 5 and discharge the water in the secondary filter cylinder 15.

[0042] In this embodiment, the control device 5 includes a base 51 fixedly arranged on the outer wall of the secondary filter cartridge 15, and a compression rod 52 is slidably provided on the base 51. The compression rod 52 is located below the lower pressure rod 46, and the lower pressure rod 46 is telescopically arranged. A compression spring 53 is sleeved on the compression rod 52, and the two ends of the compression spring 53 are respectively connected to the compression rod 52 and the base 51. A trigger rod 54 is slidably provided on the compression rod 52, and the trigger rod 54 is slidably provided on the base 51. A card cavity 55 is opened on the base 51, and a conical stopper 56 is fixed on the trigger rod 54. The conical stopper 56 slides with the card cavity 55, and a connecting spring 57 is sleeved on the trigger rod 54. The two ends of the connecting spring 57 are respectively connected to the conical stopper 56 and the compression The retraction rod 52 is connected, and a resistance rod 58 is also slidably provided on the base 51, and one end of the resistance rod 58 is arranged toward the card cavity 55, and a notch 59 is provided on the end of the resistance rod 58 facing the card cavity 55, and the notch 59 contacts the conical stopper 56, and the resistance rod 58 is also provided with an inclined end 510 that contacts the inclined surface 35 of the conical stopper 56, and the resistance rod 58 is also provided with a return spring 511, and the two ends of the return spring 511 are respectively connected to the resistance rod 58 and the card seat 51, and a control rod 512 is vertically provided on the resistance rod 58, and a wedge block 513 with a wedge-shaped setting is provided on the control rod 512, and a wedge-shaped groove in contact with the wedge block 513 is provided on the resistance rod 58, and the bottom of the trigger rod 54 contacts the control end of the drain valve 17.

[0043] The support frame 13 is also provided with a reciprocating device 6, which includes a reciprocating plate 61 slidably arranged on the support frame 13, a fixed frame 62 is fixedly arranged on the reciprocating plate 61, a sliding groove 63 is provided on the fixed frame 62, and a rotating block 64 is fixedly connected to the driving rod 23. The end of the rotating block 64 away from the driving rod 23 is fixedly connected to a push rod 65, and the push rod 65 is in contact with the sliding groove 63 on the fixed frame 62. A pressure block 66 is fixedly provided on the fixed frame 62, and the pressure block 66 is in contact with the control rod 512.

[0044] When the gas enters the secondary filter cartridge 15, the air inlet valve 16 is closed during the downward movement of the sliding cylinder 28, and the gas can be discharged from the secondary filter cartridge 15 through the exhaust pipe 101 at the control chamber 14. After the gas is discharged, there is still water in the secondary filter cartridge 15 during the filtration process and stays at the inner bottom of the secondary filter cartridge 15. At this time, the sliding cylinder 28 continues to move downward, and the pressing rod 46 moves downward under the drive of the rotating cylinder 41. The pressing rod 46 contacts the top surface of the compression rod 52 at this time. The continuous downward movement of the pressing rod 46 will drive the compression rod 52 to move downward, and the downward movement of the compression rod 52 will cause the compression rod 52 and the trigger The connecting spring 57 provided between the rods 54 is under pressure, and the conical stopper 56 on the trigger rod 54 is abutted by the notch 59 on the abutting rod 58, so that the trigger rod 54 is under pressure. When the gas in the secondary filter cartridge 15 is discharged outward and reaches the water storage position in the secondary filter cartridge 15, the driving rod 23 drives the rotating block 64 to rotate. The rotating block 64 drives the fixed frame 62 to drive the reciprocating plate 61 toward the control rod 512 through the push rod 65, and the pressure block 66 on the fixed frame 62 contacts the control rod 512, which drives the control rod 512 to press down, and the control rod 51 2 will contact the wedge-shaped groove on the interference rod 58, and then the interference rod 58 will separate the notch 59 from the conical stopper 56 under the drive of the wedge-shaped groove. When the conical stopper 56 is no longer in contact with the interference rod 58, the trigger rod 54 will move downward rapidly under the drive of the connecting spring 57, and the trigger rod 54 will contact the control end of the drain valve 17 to open the drain valve 17, so that the water after gas filtration in the secondary filter cartridge 15 can be discharged into the drain filter chamber 19. At this time, the flow rate of water when the drain valve 17 is opened will flush the impurities remaining on the filter screen 18, thereby removing the impurities remaining on the filter screen 18. When the gas is undergoing dust removal treatment, it is first sucked into the secondary filter cartridge 15 through the discharge device 3 and the air inlet valve 16. The gas is then sprayed so that dust impurities remain in the water in the secondary filter cartridge 15 and on the filter screen 18. The discharge device 3 then discharges the gas and squeezes the control device 5, so that after the gas is discharged, the drain valve 17 can be opened under the drive of the reciprocating device 6 to discharge the filtered water. First, the filtered water can be centrally processed, and second, the dust impurities remaining on the filter screen 18 can be effectively flushed, and the impurities on the filter screen 18 are removed by the accumulated water, so that the filter screen 18 can be self-cleaned.

[0045] The downward pressure rod 46 is telescopically arranged to continuously squeeze the compression rod 52, so that the trigger rod 54 can continuously contact the drain valve 17 to drain all the water in the secondary filter cartridge 15. When all the water is drained, the downward pressure rod 46 moves up and separates from the compression rod 52, and the pressure block 66 on the fixing frame 62 no longer contacts the control rod 512. The resistance rod 58 is reset under the drive of the reset spring 511, and the compression rod 52 moves up and reset under the drive of the compression spring 53. The trigger rod 54 moves up and reset at the same time under the drive of the connecting spring 57. After the conical stopper 56 on the trigger rod 54 contacts the inclined end 510 on the resistance rod 58, it moves up and contacts the notch 59 on the resistance rod 58 again, thereby separating the trigger rod 54 from the drain valve 17 and closing the drain valve 17, so that the two secondary filter cartridges 15 can continue to remove dust from the gas.

[0046] The present invention also provides a maltodextrin tail wind dust removal method, which is implemented using the above-mentioned maltodextrin tail wind dust removal device, including the following steps: S1: When the tail gas in the maltodextrin is treated, the tail gas is sucked into the spray area 12 in the hollow shell 1 through the air inlet pipe 11, and the spray area 12 first performs a preliminary spray filtration on the inhaled tail gas, and then the first connecting block 22 is rotated under the drive of the driving motor 21. The first connecting block 22 and the second connecting block 24 are connected by a connecting rod 25, and then when the first connecting block 22 rotates, it can drive the connecting rod 25 to rotate the second connecting block 24, and the connecting rod 25 between the first connecting block 22 and the second connecting block 24 will swing around the axis point of the driving motor 21. Since the connecting frame 26 and the extension rod 27 can rotate relative to each other, and the extension rod The ball 211 between 27 and the moving rod 210 is hingedly matched, and then when the connecting frame 26 provided on the connecting rod 25 swings under the drive of the connecting rod 25, the extension rod 27 drives the moving rod 210 to move back and forth, and the other end of the moving rod 210 is hingedly matched with the mounting rod 29, and then when the moving rod 210 moves back and forth, the sliding cylinder 28 can be driven to move back and forth in the secondary filter cylinder 15 through the mounting rod 29, and when the connecting rod 25 swings under the drive of the first connecting block 22 and the second connecting block 24, the sliding cylinders 28 in the two secondary filter cylinders 15 will move in the opposite direction, so that the discharge devices 3 on the two sliding cylinders 28 will move alternately in the opposite direction, and the gas in the spray area 12 can be collected into the secondary filter cylinder 15 respectively through the alternating movement of the two discharge devices 3;

[0047] When the sliding cylinder 28 is moved upward in the secondary filter cartridge 15, the sliding cylinder 28 drives the sieve column 32 to move upward, and the sliding cylinder 28 drives the sieve column 32 to move upward, and under the restriction of the pressure spring 34, the sieve column 32 is in contact with the inclined surface 35 on the inner wall of the secondary filter cartridge 15, thereby causing the sliding cylinder 28 to move upward. At this time, the air inlet valve 16 is in the open state, and the air in the spray area 12 can be drawn into the secondary filter cartridge 15 through the intake valve 16, and the air in the secondary filter cartridge 15 is filtered twice through the spray head on the secondary filter cartridge 15. When the sliding cylinder 28 is moved downward in the secondary filter cartridge 15, the air in the secondary filter cartridge 15 is closed. Under the influence of the air resistance in the secondary filter cartridge 15, the limiting rod 33 on the sieve column 32 squeezes the pressure spring 34, so that the sieve column 32 is separated from the inclined surface 35 on the inner wall of the sliding cylinder 28, thereby allowing the filtered air in the secondary filter cartridge 15 to be discharged outward.

[0048] S3: When the driving motor 21 drives the first connecting block 22 to rotate so that the second connecting block 24 drives the driving rod 23 to rotate, the driving rod 23 drives the driving gear 43 to rotate, and the rotation of the driving gear 43 can contact the rotating gears 42 on the two switching devices 4, so that the driving gear 43 can synchronously drive the two rotating gears 42 to rotate, and the rotation of the rotating gear 42 can drive the rotating cylinder 41 to rotate. When the rotating cylinder 41 rotates, the side strip 44 drives the two limiting wheels 47 to move, and the two limiting wheels 47 drive the pressing rod 46 to move. The reciprocating up and down movement of the lower pressure rod 46 is consistent with the moving frequency of the sliding cylinder 28 in the secondary filter cylinder 15. When the sliding cylinder 28 moves up, the lower pressure rod 46 moves upward. When the sliding cylinder 28 moves downward to discharge the gas in the secondary filter cylinder 15, the drain valve 17 provided at the bottom of the secondary filter cylinder 15 is in a closed state. After the sliding cylinder 28 moves downward to discharge the gas, the lower pressure rod 46 contacts the control device 5, and then contacts the control device 5 through the downward pressure of the lower pressure rod 46, causing the control device 5 to open the drain valve 17.

[0049] When the air in the secondary filter cartridge 15 is discharged outwards, it reaches the water storage position in the secondary filter cartridge 15. When the pressing block 66 on the fixing frame 62 contacts the control rod 512, the control rod 512 is pressed downward, and the wedge block 513 on the control rod 512 contacts the wedge groove on the abutting rod 58, thereby causing the abutting rod 58 to separate the notch 59 from the conical stopper 56 under the drive of the wedge groove. When the conical stopper 56 no longer contacts the abutting rod 58, the trigger rod 54 moves downward rapidly under the drive of the connecting spring 57, and the trigger rod 54 contacts the control end of the drain valve 17 to open the drain valve 17, thereby allowing the water after gas filtration in the secondary filter cartridge 15 to be discharged into the drain filter chamber 19. At this time, when the drain valve 17 is opened, the water flow rate will flush the impurities remaining on the filter screen 18, thereby removing the impurities remaining on the filter screen 18.

[0050] S5: The lower pressure rod 46 is telescopically arranged to continuously squeeze the compression rod 52, so that the trigger rod 54 can continuously contact the drain valve 17 to drain all the water in the secondary filter cartridge 15. When all the water is drained, the lower pressure rod 46 moves up and separates from the compression rod 52, and the pressure block 66 on the fixing frame 62 no longer contacts the control rod 512. The resistance rod 58 is reset under the drive of the reset spring 511, and the compression rod 52 moves up and reset under the drive of the compression spring 53. The trigger rod 54 moves up and reset at the same time under the drive of the connecting spring 57. After the conical stop block 56 on the trigger rod 54 contacts the inclined end 510 on the resistance rod 58, it will move up and contact the notch 59 on the resistance rod 58 again, thereby separating the trigger rod 54 from the drain valve 17 and closing the drain valve 17, so that the two secondary filter cartridges 15 can continue to remove dust from the gas.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A maltodextrin tail wind dust removal device, characterized by: The invention comprises a hollow shell (1), wherein an air inlet pipe (11) is provided on the outer wall of the hollow shell (1), a spraying area (12) is provided in the hollow shell (1), the air inlet pipe (11) is connected to the spraying area (12) in the hollow shell (1), a support frame (13) is fixedly connected to the inner wall of the hollow shell (1), a control chamber (14) is formed between the support frame (13) and the inner wall of the hollow shell (1), a driving device (2) is provided in the control chamber (14), the driving device (2) is rotatably matched with the hollow shell (1), a secondary filter cartridge (15) is fixedly provided on the top of the support frame (13), a discharge device (3) is correspondingly connected to the driving device (2), the two discharge devices (3) are respectively slidably matched with the inner walls of the two secondary filter cartridges (15), and the two secondary filter cartridges (15) are respectively rotatably matched with the inner walls of the two secondary filter cartridges (15). A spray head is provided on the inner wall of each filter cartridge (15), an air inlet valve (16) is provided on the outer wall of each of the two secondary filter cartridges (15), the air inlet end of the air inlet valve (16) is connected to the spray area (12), a drain valve (17) is provided at the bottom of each of the two secondary filter cartridges (15), and a filter screen (18) is provided at the bottom of each of the secondary filter cartridges (15) above the drain valve (17), a drain filter chamber (19) is further provided in the hollow shell (1), the discharge end of each of the two drain valves (17) is connected to the drain filter chamber (19), an exhaust pipe (101) for exhausting gas is provided on the control chamber (14), a switching device (4) is rotatably provided on each of the two secondary filter cartridges (15), and the switching device (4) is slidably matched with the outer wall of the secondary filter cartridge (15); The driving device (2) includes a driving motor (21) fixedly connected to the top of the hollow shell (1), the main shaft of the driving motor (21) is rotatably matched with the top of the hollow shell (1), the main shaft of the driving motor (21) is extended toward the control chamber (14), a first connecting block (22) arranged obliquely is fixedly connected to the main shaft of the driving motor (21), a driving rod (23) is rotatably provided on the support frame (13), a second connecting block (24) arranged opposite to the first connecting block (22) is fixedly provided on the driving rod (23), a connecting rod (25) is provided between the first connecting block (22) and the second connecting block (24), a connecting frame (26) is hingedly provided on the connecting rod (25), and the connecting frame ( The two ends of the connecting frame (26) are respectively provided with extension rods (27) extending in the direction of the two secondary filter cylinders (15), and the extension rods (27) and the connecting frame (26) can rotate relative to each other. Sliding cylinders (28) are slidably provided in the two secondary filter cylinders (15), and the two sliding cylinders (28) are fixedly connected with mounting rods (29). The mounting rods (29) on the two sliding cylinders (28) are hingedly provided with moving rods (210), and the other end of the moving rod (210) away from the mounting rod (29) is provided with a ball (211). The balls (211) on the two moving rods (210) are respectively hingedly matched with the two extension rods (27) on the connecting frame (26), and the two discharge devices (3) are respectively provided on the two sliding cylinders (28).

2. A maltodextrin tail wind dust removal device according to claim 1, characterized in that: The two discharge devices (3) each include a side baffle (31) fixedly arranged on the inner wall of the sliding cylinder (28), a sieve column (32) is slidably arranged in the sliding cylinder (28), a limit rod (33) is fixedly connected to the sieve column (32), the limit rod (33) is slidably matched with the inner wall of the sliding cylinder (28), a pressure spring (34) is sleeved on the limit rod (33), the two ends of the pressure spring (34) are respectively connected to the sieve column (32) and the bottom of the two side baffles (31), the sieve column (32) is conical, and an inclined surface (35) in contact with the sieve column (32) is provided on the inner wall of the sliding cylinder (28), and the air intake valve (16) is a one-way valve.

3. A maltodextrin tail wind dust removal device according to claim 2, characterized in that: The two switching devices (4) both include a rotating cylinder (41) rotatably arranged on the top of the secondary filter cylinder (15), a rotating gear (42) fixedly connected to the rotating cylinder (41), a driving gear (43) fixedly connected to the driving rod (23), the driving gear (43) meshing with the rotating gear (42), an outer wall of the rotating cylinder (41) is provided with an inclined side strip (44), a clamping plate (45) is fixedly provided on the outer wall of the secondary filter cylinder (15), a lower pressure rod (46) is slidably provided in each of the two clamping plates (45), the upper end of the lower pressure rod (46) is rotatably provided with two limiting wheels (47), the side strip (44) on the outer wall of the rotating cylinder (41) is located between the two limiting wheels (47), the other end of the lower pressure rod (46) is arranged in the direction of the drain valve (17), and a control device (5) is provided between the lower pressure rod (46) and the drain valve (17).

4. A maltodextrin tail wind dust removal device according to claim 3, characterized in that: The control device (5) comprises a holder (51) fixedly arranged on the outer wall of the secondary filter cartridge (15); a compression rod (52) is slidably arranged on the holder (51); the compression rod (52) is located below the lower pressure rod (46), and the lower pressure rod (46) is telescopically arranged; a compression spring (53) is sleeved on the compression rod (52); two ends of the compression spring (53) are respectively connected to the compression rod (52) and the holder (51); the compression rod (52) A trigger rod (54) is slidably provided on the upper portion, the trigger rod (54) being slidably provided on the card seat (51), the card seat (51) being provided with a card cavity (55), a conical stopper (56) being fixedly provided on the trigger rod (54), the conical stopper (56) being slidably engaged with the card cavity (55), a connecting spring (57) being sleeved on the trigger rod (54), and two ends of the connecting spring (57) being respectively connected to the conical stopper (56) and the compression rod (52).

5. The maltodextrin tail wind dust removal device according to claim 4, characterized in that: The card seat (51) is also provided with a resisting rod (58) in a sliding manner. One end of the resisting rod (58) is provided in the card cavity (55). The end of the resisting rod (58) facing the card cavity (55) is provided with a notch (59), and the notch (59) contacts the conical stopper (56). The resisting rod (58) is also provided with an inclined end (510) that contacts the inclined surface (35) of the conical stopper (56). The resisting rod (58) is also provided with a complex The reset spring (511) is connected to the contact rod (58) and the base (51) at both ends, respectively. The contact rod (58) is provided with a control rod (512) vertically. The control rod (512) is provided with a wedge-shaped wedge block (513) arranged in a wedge shape. The contact rod (58) is provided with a wedge-shaped groove in contact with the wedge block (513). The bottom of the trigger rod (54) is in contact with the control end of the drain valve (17).

6. The maltodextrin tail wind dust removal device according to claim 5, characterized in that: The support frame (13) is further provided with a reciprocating device (6), the reciprocating device (6) comprising a reciprocating plate (61) slidably provided on the support frame (13), a fixed frame (62) fixedly provided on the reciprocating plate (61), a sliding groove (63) provided on the fixed frame (62), a rotating block (64) fixedly connected to the driving rod (23), an end of the rotating block (64) away from the driving rod (23) fixedly connected to a push rod (65), the push rod (65) contacts the sliding groove (63) on the fixed frame (62), a pressing block (66) fixedly provided on the fixed frame (62), and the pressing block (66) contacts the control rod (512).

7. A method for removing dust from maltodextrin tail wind, which is achieved by using a maltodextrin tail wind dust removal device according to any one of claims 1 to 6, characterized in that: The steps include: S1: When the tail gas in maltodextrin is processed, the tail gas is sucked into the spray area (12) in the hollow shell (1) through the air inlet pipe (11). The spray area (12) first performs a preliminary spray filtration on the sucked tail gas, and then the first connecting block (22) is rotated under the drive of the driving motor (21). The first connecting block (22) and the second connecting block (24) are connected by a connecting rod (25). Then, when the first connecting block (22) rotates, it can drive the connecting rod (25) to rotate the second connecting block (24). The connecting rod (25) between the first connecting block (22) and the second connecting block (24) will swing around the axis of the driving motor (21). Since the connecting frame (26) and the extension rod (27) can rotate relative to each other, and the ball (211) between the extension rod (27) and the moving rod (210) is hinged, When the connecting frame (26) provided on the connecting rod (25) swings under the drive of the connecting rod (25), the extension rod (27) drives the moving rod (210) to move back and forth, and the other end of the moving rod (210) is hingedly matched with the mounting rod (29), and then when the moving rod (210) moves back and forth, the sliding cylinder (28) can be driven to move back and forth in the secondary filter cylinder (15) through the mounting rod (29), and when the connecting rod (25) swings under the drive of the first connecting block (22) and the second connecting block (24), the sliding cylinders (28) in the two secondary filter cylinders (15) will move in the opposite direction, so that the discharge devices (3) on the two sliding cylinders (28) will move in the opposite direction and alternately. Through the alternating movement of the two discharge devices (3), the gas in the spraying area (12) can be collected in the secondary filter cylinder (15). S2: When the sliding cylinder (28) slides upward in the secondary filter cylinder (15), the sliding cylinder (28) drives the sieve column (32) to move upward, and the sliding cylinder (28) drives the sieve column (32) to move upward. Under the restriction of the pressure spring (34), the sieve column (32) fits with the inclined surface (35) on the inner wall of the secondary filter cylinder (15), and then when the sliding cylinder (28) moves upward, the air inlet valve (16) is in the open state, and the gas in the spray area (12) can be drawn into the secondary filter cylinder (15) through the air inlet valve (16). The spray head on the secondary filter cartridge (15) performs secondary filtration on the gas in the secondary filter cartridge (15), and when the sliding cartridge (28) moves downward in the secondary filter cartridge (15), the sliding cartridge (28) moves downward and the air inlet valve (16) is in a closed state. Under the influence of the gas resistance in the secondary filter cartridge (15), the limiting rod (33) on the sieve column (32) squeezes the pressure spring (34), so that the sieve column (32) is separated from the inclined surface (35) on the inner wall of the sliding cartridge (28), thereby being able to discharge the filtered gas in the secondary filter cartridge (15) to the outside; S3: When the driving motor (21) drives the first connecting block (22) to rotate so that the second connecting block (24) drives the driving rod (23) to rotate, the driving rod (23) drives the driving gear (43) to rotate, and the driving gear (43) rotates so that it can contact the rotating gears (42) on the two switching devices (4), thereby making the driving gear (43) synchronously drive the two rotating gears (42) to rotate, and the rotating gear (42) rotates so that the rotating drum (41) can be driven to rotate. When the rotating drum (41) rotates, the side strip (44) drives the two limiting wheels (47) to move, and the two limiting wheels (47) drive the pressing rod (46) to rotate. ) moves up and down reciprocatingly, and the reciprocating up and down movement of the lower pressure rod (46) is consistent with the movement frequency of the sliding cylinder (28) in the secondary filter cylinder (15). When the sliding cylinder (28) moves up, the lower pressure rod (46) moves up, and when the sliding cylinder (28) moves down to discharge the gas in the secondary filter cylinder (15), the drain valve (17) provided at the bottom of the secondary filter cylinder (15) is in a closed state. After the sliding cylinder (28) moves down to discharge the gas, the lower pressure rod (46) contacts the control device (5), and then contacts the control device (5) by pressing the lower pressure rod (46), so that the control device (5) opens the drain valve (17); S4: When the gas enters the secondary filter cartridge (15), the air inlet valve (16) is closed during the downward movement of the sliding cylinder (28), and the gas is discharged from the secondary filter cartridge (15) through the exhaust pipe (101) at the control chamber (14). After the gas is discharged, the water in the secondary filter cartridge (15) during the filtering process remains at the bottom of the secondary filter cartridge (15). At this time, the sliding cylinder (28) continues to move downward, and the lower pressure rod (46) moves downward under the drive of the rotating cylinder (41). The lower pressure rod (46) is at this time The top surface of the compression rod (52) is in contact with the lower pressure rod (46). The continuous downward movement of the compression rod (52) drives the compression rod (52) to move downward, and the downward movement of the compression rod (52) compresses the connecting spring (57) provided between the compression rod (52) and the trigger rod (54). At this time, the conical stopper (56) on the trigger rod (54) is abutted by the notch (59) on the abutting rod (58), thereby causing the trigger rod (54) to be in a compressed state. When the gas in the secondary filter cartridge (15) is discharged outward and reaches the water storage part in the secondary filter cartridge (15), the The driving rod (23) drives the rotating block (64) to rotate, and the rotating block (64) drives the fixed frame (62) to drive the reciprocating plate (61) to move toward the control rod (512) through the push rod (65) to contact the control rod (512). After the pressing block (66) on the fixed frame (62) contacts the control rod (512), it drives the control rod (512) to press down, and the wedge block (513) on the control rod (512) contacts the wedge groove on the contact rod (58), so that the contact rod (58) drives the notch (59) under the drive of the wedge groove. ) is separated from the conical stopper (56). When the conical stopper (56) is no longer in contact with the abutting rod (58), the trigger rod (54) will move downward rapidly under the drive of the connecting spring (57). The trigger rod (54) contacts the control end of the drain valve (17) to open the drain valve (17), thereby enabling the water after gas filtration in the secondary filter cartridge (15) to be discharged into the drain filter chamber (19). At this time, the flow rate of the water when the drain valve (17) is opened will flush the impurities remaining on the filter screen (18), thereby removing the impurities remaining on the filter screen (18); S5: The lower pressure rod (46) is in a telescopic arrangement and continuously squeezes the compression rod (52), so that the trigger rod (54) can continuously contact the drain valve (17) to drain all the water in the secondary filter cartridge (15). After all the water is drained, the lower pressure rod (46) moves upward and separates from the compression rod (52). The pressure block (66) on the fixed frame (62) no longer contacts the control rod (512), and the contact rod (58) is reset under the drive of the reset spring (511). The compression rod (52) is released under the compression spring. Driven by the spring (53), the trigger rod (54) moves upward and resets at the same time driven by the connecting spring (57). After the conical stopper (56) on the trigger rod (54) contacts the inclined end (510) on the abutting rod (58), it moves upward and contacts the notch (59) on the abutting rod (58) again, thereby separating the trigger rod (54) from the drain valve (17) and closing the drain valve (17), so that the two secondary filter cartridges (15) can continuously remove dust from the gas.

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