Maltodextrin tail wind dust removal device and method

Abstract

The invention relates to the field of maltodextrin tail wind treatment, discloses a maltodextrin tail wind dust removal device and a dust removal method, and aims to solve the problem that impurities in tail gas are removed by adopting a spraying method when the tail gas is discharged in the existing maltodextrin processing process, so that the tail gas is not polluted. And the tail gas after dust removal still contains a part of impurities, and the impurities on the filter screen need to be cleaned regularly in the dust removal process when the filter screen contains the impurities, so that the tail gas emission efficiency is influenced. According to the invention, gas is sucked into the secondary filter cartridge through the discharge device and the gas inlet valve, then the gas is sprayed to enable dust and impurities to remain in water and a filter screen in the secondary filter cartridge, and then the discharge device discharges the gas and extrudes the control device; and after the gas is discharged, the water discharge valve can be opened under the driving of the reciprocating device 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 haze problem is increasingly attracting the attention of the whole society. In the production process of corn deep processing industry, starch, maltodextrin, etc., the separation of dry airflow and product generally only uses a cyclone separator. Although the separation efficiency reaches 99%, it is still difficult to meet the increasingly stringent environmental protection requirements.

[0003] The existing patent (Announcement No.: CN207838617U) discloses a maltodextrin spray drying powder collection system based on a thermophoretic dust collector and a sieve plate tower, including a thermophoretic dust collector, a sieve plate tower, and a demister; the upper end of the thermophoretic dust collector is connected to the dextrin spray drying tail gas inlet, and the lower end is connected to the sieve plate tower; a demister is provided on the top of the sieve plate tower; a first centrifugal fan is provided at the rear end of the demister, and the thermophoretic dust collector is particularly suitable for removing light dust, and can effectively gather submicron particles into millimeter-sized particles, which is convenient for removal and greatly reduces the difficulty of capturing light submicron particles. However, there are at least the following problems in the above-mentioned prior art that have not been solved: when the tail gas of the existing maltodextrin is discharged during the processing, the impurities in the tail gas are removed by a spraying method, and the tail gas after the dust removal still contains a part of the 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. 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 arranged on the outer wall of the hollow shell, a spray area is arranged 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 arranged in the control chamber, the driving device is rotatably matched with the hollow shell, a secondary filter cartridge is fixedly arranged 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 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 with 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 with the drainage filter chamber. An exhaust pipe for exhausting gas is provided on the control chamber. Switching devices are rotatably provided on the two secondary filter cartridges, and the switching devices are slidably matched with the outer walls of the secondary filter cartridges.

[0006] Preferably, the driving device includes a driving motor fixedly connected to the top of the hollow shell, the main shaft of the driving motor is rotatably matched with the top of the hollow shell, the main shaft of the driving motor extends toward the control chamber, the main shaft of the driving motor is fixedly connected to a first connecting block arranged obliquely, the support frame is rotatably provided with a driving rod, the driving rod is fixedly provided with a second connecting block arranged opposite to the first connecting block, a connecting rod is provided between the first connecting block and the second connecting block, the connecting rod is hingedly provided with a connecting frame, the two ends of the connecting frame are respectively extended with extension rods in the direction of two secondary filter cylinders, the extension rod and the connecting frame can rotate relative to each other, sliding cylinders are slidably provided in the two secondary filter cylinders, the two sliding cylinders are fixedly connected to mounting rods, the mounting rods on the two sliding cylinders are hingedly provided with moving rods, and the other end of the moving rod away from the mounting rod is provided with a ball, the balls on the two moving rods are respectively hingedly matched with the two extension rods on the connecting frame, and the two discharge devices are respectively provided on the two sliding cylinders.

[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 is slidably matched 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 arranged in a conical shape, 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 arranged as 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, a driving gear is fixedly connected to the driving rod, the driving gear is meshed with the rotating gear, the outer wall of the rotating cylinder is provided with inclined side strips, a clamping plate is fixedly provided on the outer wall of the secondary filter cylinder, a lower pressure rod is slidably provided in the two clamping plates, the upper end of the lower pressure rod is rotatably provided with two limiting wheels, the side strip on the outer wall of the rotating cylinder is located between the two limiting wheels, the other end of the lower pressure rod is arranged 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 arranged 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 arranged 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 fixedly arranged on the trigger rod, the conical stopper slidably cooperates with the card cavity, and a connecting spring is sleeved on the trigger rod, and the two ends of the connecting spring are respectively connected to the conical stopper The block is connected with the compression rod, and a resistance rod is also slidably arranged on the base, one end of the resistance rod is arranged toward the card cavity, and a notch is arranged at the end of the resistance rod facing the card cavity, and the notch contacts the conical block, and an inclined end in contact with the inclined surface of the conical block is also arranged on the resistance rod, and a return spring is also arranged on the resistance rod, and the two ends of the return spring are respectively connected with the resistance rod and the card seat, a control rod is vertically arranged on the resistance rod, a wedge block arranged in a wedge shape is arranged on the control rod, a wedge-shaped groove in contact with the wedge block is opened 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 arranged on the reciprocating plate, a sliding groove is provided on the fixed frame, 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, the push rod is in contact with the sliding groove on the fixed frame, and a pressure block is fixedly arranged 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: S1: When the tail gas in maltodextrin is treated, the tail gas is sucked into the spray area in the hollow shell through the air inlet pipe. The spray area first performs 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 relatively, and the ball between the extension rod and the moving rod is hinged, the connecting frame and the extension rod can rotate relatively. When the connecting frame arranged on the connecting rod swings driven by 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, and 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, and 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, so that the discharge devices on the two sliding cylinders will move in the opposite direction and alternately, and the gas in the spraying area can be collected toward the secondary filter cylinder respectively through the alternating movement of the two discharge devices; 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, and 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, and 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 to the outside; S3: When the driving motor drives the first connecting block to rotate so that the second connecting block drives the driving rod to rotate, the driving rod will drive the driving gear to rotate, and the rotation of the driving gear can contact the rotating gears on the two switching devices, so that the driving gear can synchronously drive the two rotating gears to rotate, and the rotation of the rotating gear can drive the rotating drum to rotate. When the rotating drum rotates, the side strips will drive the two limiting wheels to move, and the two limiting wheels will drive the lower pressure rod to move up and down reciprocatingly. The reciprocating up and down movement of the lower pressure rod is consistent with the movement frequency of the sliding drum in the secondary filter drum. When the sliding drum moves up, the lower pressure rod will move upward, and when the sliding drum moves down to discharge the gas in the secondary filter drum to the outside, the drain valve set at the bottom of the secondary filter drum is in a closed state, and after the sliding drum moves down to discharge the gas, the lower pressure rod will contact the control device, and then contact the control device through the downward pressure of the lower pressure rod, so that the control device opens the drain valve; 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 to discharge the filtered gas. 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 driven by the rotating cylinder. The pressing rod contacts the top surface of the compression rod at this time. The continuous downward movement of the pressing rod will drive the compression rod to move downward, and the downward movement of the compression rod will compress the connecting spring arranged between the compression rod and the trigger rod, and the conical stopper on the trigger rod is abutted by the notch on the abutting rod at this time, so that the trigger rod is in a compressed state at this time. When the gas in the secondary filter cartridge is discharged outward, it reaches the secondary filter cartridge. When the water storage part is reached, the driving rod drives the rotating block to rotate, and the rotating block drives the fixed frame to drive the reciprocating plate to move 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 drives the control rod to press down, and the wedge block on the control rod contacts the wedge groove on the resistance rod, so that the resistance rod is driven by the wedge groove to separate the notch from the conical block. When the conical block no longer contacts the resistance rod, the trigger rod moves downward rapidly driven by the connecting spring, and the trigger rod contacts 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, and then remove the impurities remaining on the filter screen. S5: The lower pressure rod is telescopically arranged 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 lower 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 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.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 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 toward the secondary filter cylinders 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.

[0013] 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 after filtering in the secondary filter cylinder can be discharged to the outside, 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 without interruption.

[0014] 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 pressing down, so that the control device will open the drain valve to discharge the water in the secondary filter cylinder after the gas is filtered. Through this arrangement, 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.

[0015] In the present invention, the trigger rod contacts the control end of the drain valve to open the drain valve so that the water after gas filtering 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, 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. Then, the gas is sprayed to leave dust and impurities in the water in the secondary filter cartridge and on the filter screen. Subsequently, the discharge device squeezes the control device after the gas is discharged, 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. The impurities on the filter screen are removed by the accumulated water, and the filter screen can be self-cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a sectional view of the three-dimensional structure of the present invention; Figure 3 It is a partial three-dimensional structural cross-sectional view of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the discharge device and the drive device of the present invention; Figure 5 It is a sectional view of the three-dimensional structure of the secondary filter cartridge of the present invention; Figure 6 It is a schematic diagram of a partial three-dimensional structure of the driving device of the present invention; Figure 7 It is a sectional view of the three-dimensional structure of the discharge device of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the driving device and the switching device of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the control device of the present invention; Fig.10 It is a sectional view of the three-dimensional structure of the control device of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the reciprocating device and the control device of the present invention.

[0017] In the figure: 1. hollow shell; 11. air inlet pipe; 12. spray area; 13. support frame; 14. control chamber; 15. secondary filter cartridge; 16. air 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. Rejection 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

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0019] 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 arranged on the outer wall of the hollow shell 1, a spray area 12 is arranged in the hollow shell 1, the air inlet pipe 11 is connected 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 arranged in the control chamber 14, the driving device 2 is rotatably matched with the hollow shell 1, a secondary filter cartridge 15 is fixedly arranged on the top of the supporting frame 13, a discharge device 3 is correspondingly connected to the driving device 2, and two discharge devices 3 are respectively connected to two secondary filter cartridges 15 The inner wall of the two secondary filter cartridges 15 is slidably matched, a spray head is provided on the inner wall of the two secondary filter cartridges 15, an air inlet valve 16 is provided on the outer wall of the two secondary filter cartridges 15, and the air inlet end of the air inlet valve 16 is connected with the spray area 12, and the bottom of the two secondary filter cartridges 15 is provided with a drain valve 17, and the bottom of the secondary filter cartridge 15 is located above the drain valve 17 and is provided with a filter screen 18, and a drain filter chamber 19 is also provided in the hollow shell 1, and the discharge ends of the two drain valves 17 are connected with the drain filter chamber 19, and 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 is slidably matched with the outer wall of the secondary filter cartridge 15.

[0020] 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, the main shaft of the driving motor 21 is extended toward the control chamber 14, and 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 arranged on the support frame 13, a second connecting block 24 arranged opposite to the first connecting block 22 is fixedly arranged on the driving rod 23, a connecting rod 25 is arranged between the first connecting block 22 and the second connecting block 24, and a connecting frame 26 is hingedly arranged on the connecting rod 25, so that Extension rods 27 are respectively provided at both ends of the connecting frame 26 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 mounting rods 29 are fixedly connected to the two sliding cylinders 28. 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.

[0021] 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 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, so that 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, and the alternating movement of the two discharge devices 3 can collect the gas in the spray area 12 toward the secondary filter cylinder 15 respectively, and the gas will be filtered again by the spray heads in the two secondary filter cylinders 15 to further filter the impurities contained in the gas.

[0022] In this embodiment, 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 limiting rod 33 is fixedly connected to the sieve column 32, the limiting rod 33 is slidably matched 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 arranged in a conical shape, 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 arranged as a one-way valve.

[0023] 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, and the upward movement of 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 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 an 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, and when the sliding cylinder 28 moves downward in the secondary filter cylinder 15, the sliding cylinder 28 moves downward. The valve 16 is in a closed state. Under the influence of the gas resistance in the secondary filter cartridge 15, the limit 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, and the gas filtered in the secondary filter cartridge 15 can be discharged to the outside, 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.

[0024] 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, a driving gear 43 is fixedly connected to the driving rod 23, 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, the outer wall of the secondary filter cylinder 15 is fixedly provided with a clamping plate 45, and a downward pressure rod 46 is slidably provided in the two clamping plates 45, and the upper end of the downward 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 downward pressure rod 46 is set in the direction of the drain valve 17, and a control device 5 is provided between the downward pressure rod 46 and the drain valve 17.

[0025] 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 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 pressure rod 46 will move upward, and when the sliding cylinder 28 moves downward to discharge the gas in the secondary filter cylinder 15, the drain valve 17 set at the bottom of the secondary filter cylinder 15 is in a closed state, and when the sliding cylinder 28 moves downward to discharge the gas, the pressure rod 46 will contact the control device 5, and then through the downward pressure of the pressure rod 46, it will contact the control device 5, so that the control device 5 will open the drain valve 17 and discharge the water in the secondary filter cylinder 15 after the gas is filtered. Through this arrangement, the frequency of the reciprocating movement of the pressure rod 46 is the same as the frequency of the movement of the sliding cylinder 28, so that the pressure rod 46 can contact the control device 5 to discharge the water in the secondary filter cylinder 15.

[0026] In this embodiment, the control device 5 includes 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, and the two ends of the compression spring 53 are respectively connected to the compression rod 52 and the holder 51, a trigger rod 54 is slidably arranged on the compression rod 52, the trigger rod 54 is slidably arranged on the holder 51, a card cavity 55 is opened on the holder 51, a conical stopper 56 is fixedly arranged on the trigger rod 54, the conical stopper 56 is slidably matched with the card cavity 55, a connecting spring 57 is sleeved on the trigger rod 54, and the two ends of the connecting spring 57 are respectively connected to the conical stopper 56 and the compression The retracted rod 52 is connected, and a resistance rod 58 is also slidably arranged on the base 51, one end of the resistance rod 58 is arranged toward the card cavity 55, and a notch 59 is arranged at 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, a control rod 512 is vertically arranged on the resistance rod 58, and a wedge block 513 arranged in a wedge shape is arranged on the control rod 512, and a wedge groove that contacts the wedge block 513 is opened on the resistance rod 58, and the bottom of the trigger rod 54 contacts the control end of the drain valve 17.

[0027] The support frame 13 is also provided with a reciprocating device 6, and the reciprocating device 6 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 opened on the fixed frame 62, and a rotating block 64 is also fixedly connected to the driving rod 23, and a push rod 65 is fixedly connected to the end of the rotating block 64 away from the driving rod 23, and the push rod 65 is in contact with the sliding groove 63 on the fixed frame 62, and a pressure block 66 is fixedly arranged on the fixed frame 62, and the pressure block 66 is in contact with the control rod 512.

[0028] When the gas enters the secondary filter cartridge 15, the 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, the water in the secondary filter cartridge 15 during the filtration process remains 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 arranged between the rods 54 is compressed, 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 in a compressed state at this time. 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 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 direction of the control rod 512 through the push rod 65, and the pressing block 66 on the fixed frame 62 drives the control rod 512 to press down after contacting the control rod 512, and the control rod 512 is pressed down. The wedge block 513 on the second filter cartridge 15 will contact the wedge groove on the contact rod 58, so that the contact rod 58 is driven by the wedge groove to separate the notch 59 from the conical block 56. When the conical block 56 is no longer in contact with the contact 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, 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 rinsed. The impurities on the filter screen 18 are removed by the accumulated water, and the filter screen 18 is self-cleaned.

[0029] 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 resets under the drive of the compression spring 53. The trigger rod 54 moves up and resets 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 abuts against 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 continuously remove dust from the gas.

[0030] 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, and includes 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 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, and 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, because the connecting frame 26 and the extension rod 27 can rotate relatively, and the extension rod The ball 211 between 27 and the moving rod 210 is hingedly matched, and then 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 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, and the gas in the spray area 12 can be collected toward the secondary filter cylinder 15 through the alternating movement of the two discharge devices 3; 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, and the upward movement of 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 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 an 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, and when the sliding cylinder 28 moves downward in the secondary filter cylinder 15, the sliding cylinder 28 moves downward. At this time, the air inlet valve 16 is in a closed state, and under the influence of the gas resistance in the secondary filter cylinder 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, so that the filtered gas in the secondary filter cylinder 15 can be discharged 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, so that the driving gear 43 can synchronously drive the two rotating gears 42 to rotate, and the rotating gear 42 rotates so that it can drive the rotating cylinder 41 to rotate, and 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 down-pressing 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 down-pressing rod 46 moves upward, 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 down-pressing rod 46 contacts the control device 5, and then contacts the control device 5 through the downward pressure of the down-pressing 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 can be discharged from the secondary filter cartridge 15 through the exhaust pipe 101 at the control chamber 14 to discharge the filtered gas. 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 compress the connecting spring 57 arranged between the compression rod 52 and the trigger rod 54, and the conical stopper 56 on the trigger rod 54 is now abutted by the notch 59 on the abutting rod 58, so that the trigger rod 54 is in a compressed state at this time. When the gas in the secondary filter cartridge 15 is discharged outward and reaches the water storage position in the secondary filter cartridge 15, , at this time, the driving rod 23 drives the rotating block 64 to rotate, and the rotating block 64 will drive the fixed frame 62 to drive the reciprocating plate 61 to move toward the direction of the control rod 512 and contact the control rod 512 through the push rod 65. After the pressure block 66 on the fixed frame 62 contacts the control rod 512, it will drive the control rod 512 to press down, and the wedge block 513 on the control rod 512 will contact the wedge groove on the abutting rod 58, so that the abutting rod 58 is driven by the wedge groove to separate the notch 59 from the conical block 56. When the conical block 56 no longer contacts the abutting rod 58, the trigger rod 54 will move downward rapidly driven by 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 to 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. 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 resets under the drive of the compression spring 53. The trigger rod 54 moves up and resets 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 continuously remove dust from the gas.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A maltodextrin tail wind dust removal device, characterized in that: The invention comprises a hollow shell (1), wherein an air inlet pipe (11) is arranged on the outer wall of the hollow shell (1), a spraying area (12) is arranged inside the hollow shell (1), the air inlet pipe (11) is connected to the spraying area (12) inside 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 arranged in the control chamber (14), the driving device (2) and the hollow shell (1) are rotatably matched, a secondary filter cartridge (15) is fixedly arranged 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 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); 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 housing (1); the discharge ends of the two drain valves (17) are connected to the drain 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 each of the two secondary filter cartridges (15); the switching device (4) is slidably matched with the outer wall of the secondary filter cartridge (15).

2. A maltodextrin tail wind dust removal device according to claim 1, characterized in that: The driving device (2) comprises a driving motor (21) fixedly connected to the top of the hollow shell (1), the main shaft of the driving motor (21) being rotatably matched with the top of the hollow shell (1), the main shaft of the driving motor (21) extending toward the control chamber (14), the main shaft of the driving motor (21) being fixedly connected to a first connecting block (22) arranged obliquely, the supporting frame (13) being rotatably provided with a driving rod (23), the driving rod (23) being fixedly provided with a second connecting block (24) arranged opposite to the first connecting block (22), a connecting rod (25) being provided between the first connecting block (22) and the second connecting block (24), the connecting rod (25) being hingedly provided with a connecting frame (26), the connecting frame (26) Extension rods (27) are respectively provided at both ends of the connecting frame (26) extending in 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).

3. A maltodextrin tail wind dust removal device according to claim 2, 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) in correspondence, 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 arranged in a conical shape, 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 air intake valve (16) is arranged as a one-way valve.

4. A maltodextrin tail wind dust removal device according to claim 3, characterized in that: The two switching devices (4) each comprise a rotating cylinder (41) rotatably arranged on the top of the secondary filter cylinder (15); a rotating gear (42) is fixedly connected to the rotating cylinder (41); a driving gear (43) is fixedly connected to the driving rod (23); the driving gear (43) meshes 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 arranged on the outer wall of the secondary filter cylinder (15); a pressing rod (46) is slidably arranged in each of the two clamping plates (45); two limiting wheels (47) are rotatably arranged at the upper end of the pressing rod (46); 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 pressing rod (46) is arranged in the direction of the drain valve (17); and a control device (5) is arranged between the pressing rod (46) and the drain valve (17).

5. A maltodextrin tail wind dust removal device according to claim 4, 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) being slidably arranged on the holder (51), the compression rod (52) being located below the lower pressure rod (46), and the lower pressure rod (46) being telescopically arranged, a compression spring (53) being sleeved on the compression rod (52), two ends of the compression spring (53) being respectively connected to the compression rod (52) and the holder (51), the compression rod (52) A trigger rod (54) is slidably arranged on the upper part, the trigger rod (54) is slidably arranged on the clamping seat (51), a clamping cavity (55) is provided on the clamping seat (51), a conical stopper (56) is fixedly arranged on the trigger rod (54), the conical stopper (56) is slidably matched with the clamping cavity (55), and a connecting spring (57) is sleeved on the trigger rod (54), and two ends of the connecting spring (57) are respectively connected to the conical stopper (56) and the compression rod (52).

6. A maltodextrin tail wind dust removal device according to claim 5, characterized in that: The card seat (51) is also provided with a resisting rod (58) slidably disposed thereon, one end of the resisting rod (58) being disposed toward the card cavity (55), a notch (59) being disposed at the end of the resisting rod (58) facing the card cavity (55), and the notch (59) being in contact with the conical stopper (56), the resisting rod (58) being also provided with an inclined end (510) in contact with the inclined surface (35) of the conical stopper (56), and the resisting rod (58) being also provided with a complex The return spring (511) is provided with a reset spring (511), the two ends of the reset spring (511) are respectively connected to the abutment rod (58) and the holder (51), the abutment rod (58) is vertically provided with a control rod (512), the control rod (512) is provided with a wedge block (513) arranged in a wedge shape, the abutment rod (58) is provided with a wedge groove in contact with the wedge block (513), and the bottom of the trigger rod (54) is in contact with the control end of the drain valve (17).

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

8. A method for removing dust from maltodextrin tail wind, using a maltodextrin tail wind dust removal device as claimed in any one of claims 1 to 7, characterized in that: The steps include: 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). The spray area (12) first performs 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). When the first connecting block (22) rotates, the connecting rod (25) can be driven 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 hingedly matched, the connecting frame (26) and the extension rod (27) can rotate relative to each other. 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), so that 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) move in the opposite direction, so that the discharge devices (3) on the two sliding cylinders (28) move in the opposite direction alternately, and the gas in the spraying area (12) can be collected toward the secondary filter cylinder (15) through the alternating movement of the two discharge devices (3); 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. 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) and the inclined surface (35) on the inner wall of the secondary filter cylinder (15) are fitted. When the sliding cylinder (28) moves upward, the air inlet valve (16) is in an open state. The air inlet valve (16) can be used to draw the gas in the spraying area (12) into the secondary filter cylinder (15). 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 limit 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 enabling the gas in the secondary filter cartridge (15) to be discharged to the outside after being filtered; 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 enabling the driving gear (43) to synchronously drive the two rotating gears (42) to rotate, and the rotating gear (42) rotates so that the rotating cylinder (41) can be driven to rotate, and 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 rotate. ) reciprocates up and down, the reciprocating up and down movement of the pressing 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 pressing rod (46) moves upward, and 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, and when the sliding cylinder (28) moves downward to discharge the gas, the pressing rod (46) contacts the control device (5), and then contacts the control device (5) by pressing the pressing rod (46) downward, 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, water in the secondary filter cartridge (15) during the filtering process remains at the inner 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). At this time, the lower pressure rod (46) The compression rod (52) is in contact with the top surface of the compression rod (52). The downward movement of the compression rod (52) drives the compression rod (52) to move downward. The downward movement of the compression rod (52) causes the connecting spring (57) provided between the compression rod (52) and the trigger rod (54) to be compressed. The conical stopper (56) on the trigger rod (54) is abutted by the notch (59) on the abutting rod (58). The trigger rod (54) is then in a compressed state. When the gas in the secondary filter cartridge (15) is discharged outward and reaches the water storage portion in the secondary filter cartridge (15), the The driving rod (23) drives the rotating block (64) to rotate, and the rotating block (64) causes 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 downward, and the wedge block (513) on the control rod (512) contacts the wedge groove on the abutting rod (58), so that the abutting rod (58) is driven by the wedge groove to move the notch (59) ) is separated from the conical stopper (56), and when the conical stopper (56) is no longer in contact with the abutment rod (58), the trigger rod (54) will move downward rapidly under the drive of the connection spring (57), and the trigger rod (54) will contact the control end of the drain valve (17) to open the drain valve (17), thereby enabling the water in the secondary filter cartridge (15) to be discharged after the gas is filtered 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 downward pressing 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 discharge all the water in the secondary filter cartridge (15). After all the water is discharged, the downward pressing rod (46) moves upward and separates from the compression rod (52), and the pressing block (66) on the fixing frame (62) no longer contacts the control rod (512). The contact rod (58) is reset under the drive of the reset spring (511), and the compression rod (52) is released under the compression spring. The trigger rod (54) is driven by the connecting spring (57) to move upward and reset, and the trigger rod (54) is driven by the connecting spring (57) to move upward and reset at the same time. After the conical stopper (56) on the trigger rod (54) contacts the inclined end (510) on the abutting rod (58), the trigger rod (54) 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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