A dust collecting device for directional collection of lead-containing flue dust

Abstract

The present application relates to the technical field of smoke cleaning, and discloses a kind of directional trapping dust collecting equipment of lead-containing flue dust, including middle box, the top side of the middle box is fixedly connected with pulse injection main pipe, the top of the middle box is fixedly connected with multiple injection branch pipes, the outside of the injection branch pipe is fixedly connected with multiple nozzles, the top of the middle box is fixedly connected with top plate, the inside of the top plate is provided with anti-turbulence mechanism, the bottom of the middle box is fixedly connected with dust hopper, the inside top of the dust hopper is fixedly connected with anti-backflow mechanism, the inside of the dust hopper is provided with arch breaking mechanism.The composition of anti-turbulence mechanism and anti-backflow mechanism realizes that filter bag is individually covered when cleaning filter bag, and guides airflow to carry dust downward into dust collecting hopper, and can prevent dust in dust collecting hopper from flying again and adhering to filter bag, so that it can prevent toxic dust from circulating and adsorbing filter bag, and improve trapping efficiency.

Description

Technical Field

[0001] This invention relates to the field of smoke and dust cleaning technology, specifically to a directional dust collection device for lead-containing flue gas. Background Technology

[0002] Existing technologies for directional dust collection of lead-containing flue gas often employ pulse-jet bag filters. Lead-containing flue gas enters the dust chamber through the inlet and flows directionally towards the filter bags, where lead dust is trapped on the outer surface. The purified flue gas is then collected and discharged through the outlet duct. A pulse-jet cleaning mechanism is installed at the top of the equipment. Compressed air is sprayed downwards through pulse valves and nozzles to perform pulse cleaning of the filter bags, causing the attached lead dust to fall into the lower ash hopper and then be discharged and collected through the ash discharge component. This equipment relies on filter bags to achieve directional dust interception, making it suitable for treating lead-containing flue gas in smelting conditions and widely used.

[0003] While pulse jet baghouse dust collectors in the current technology can remove lead dust during pulse cleaning, the airflow impacts the dust inside the housing and in the dust collection hopper. This causes the dust to be carried away by the turbulent flow, resulting in secondary dust re-adhesion onto the filter bag surface. Consequently, toxic dust is re-adsorbed onto the filter bag, reducing the collection efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a directional dust collection device for lead-containing flue gas, which solves the problem that in existing pulse bag dust collectors, dust is re-entrained and adheres to the surface of the filter bags during filter bag cleaning, reducing collection efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a directional dust collection device for lead-containing flue gas, comprising a middle chamber, a pulse jet main pipe fixedly connected to one side of the top of the middle chamber, multiple pulse jet branch pipes fixedly connected to both sides of the top of the middle chamber, multiple nozzles fixedly connected to the outside of the pulse jet branch pipes, a top plate fixedly connected to the top of the middle chamber, an anti-turbulence mechanism provided inside the top plate, a dust collection hopper fixedly connected to the bottom of the middle chamber, an anti-backflow mechanism fixedly connected to the top inner side of the dust collection hopper, an arch-breaking mechanism provided inside the dust collection hopper, a clean air outlet pipe fixedly connected to the top outer side of the middle chamber, and an air inlet flue fixedly connected to the outer side of the dust collection hopper.

[0006] Preferably, the anti-turbulence mechanism includes four connecting pipe heads, the bottom ends of which are detachably connected to the four corners of the top plate. An accordion-style airbag is threaded into the bottom end of each connecting pipe head. A tension spring is fitted around the accordion-style airbag. A fixed cylinder is fixedly connected to the bottom of the accordion-style airbag. Multiple ventilation holes are opened at the top of the fixed cylinder. A central tube is fixedly connected inside each ventilation hole. A sliding ring is slidably connected inside the fixed cylinder. Multiple exhaust holes are opened in the middle of the central tube. A return spring is installed inside the fixed cylinder. A movable dust baffle is slidably connected inside the central housing. The four fixed cylinders are respectively inserted into the four corners of the movable dust baffle. A fixing nut is threaded into the outside of each fixed cylinder. The fixing nut is located at the bottom of the movable dust baffle. Multiple folded membranes are fixedly connected to the bottom of the top plate. The bottom of each folded membrane is fixedly connected to the top of the movable dust baffle.

[0007] Preferably, the anti-backflow mechanism includes multiple conical hoppers, each of which is fixedly connected to the inner top of the dust collection hopper. A sealing ring is fixedly connected to the outside of each conical hopper, and a dust outlet bottom is fixedly connected to the bottom of the sealing ring. A fixed column is fixedly connected to the outside of the dust outlet bottom, and a rotating cylinder is rotatably connected to the outside of the fixed column. A torsion spring is provided inside the rotating cylinder, and a dust blocking plate is fixedly connected to the outside of the rotating cylinder.

[0008] Preferably, the arch-breaking mechanism includes a central cylinder, with multiple fixed rods fixedly connected to the outside of the central cylinder. The ends of the fixed rods away from the central cylinder are fixedly connected to the inner side of the ash collection hopper. Four ventilation connecting pipes are fixedly connected to the outside of the central cylinder. A movable pipe is slidably connected to the other end of each ventilation connecting pipe. A connecting head is fixedly connected to the top of the movable pipe. A retaining spring is sleeved on the outside of the movable pipe. A retaining ring is fixedly connected to the other end of each ventilation connecting pipe. A fixed box is fixedly connected to the outside of the ash collection hopper. An impeller is rotatably connected inside the fixed box. A crankshaft is fixedly connected to the middle of the impeller. An agitator is rotatably connected to the middle of the crankshaft. A rotating sleeve is slidably connected to the outside of the agitator. Multiple stabilizing rods are rotatably connected to the outside of the rotating sleeve. The ends of the multiple stabilizing rods away from the rotating sleeve are all fixedly connected to the inside of the ash collection hopper. A stabilizing frame is fixedly connected to the inside of the air inlet flue. The end of the crankshaft away from the fixed box is rotatably connected to the inside of the stabilizing frame. A pipe is fixedly connected between the top of the fixed box and the bottom of the central cylinder.

[0009] Preferably, one end of the return spring is fixedly connected to the bottom of the inner end of the fixed cylinder, and the other end of the return spring is fixedly connected to the bottom of the sliding ring.

[0010] Preferably, the inner side of the sliding ring is slidably connected to the outside of the middle tube, and the bottom of the middle tube penetrates the bottom of the fixed cylinder.

[0011] Preferably, one end of the tension spring is fixedly connected to the bottom of the top plate, and the other end of the tension spring is fixedly connected to the top of the movable dust baffle.

[0012] Preferably, one end of the torsion spring is fixedly connected to the inside of the rotating cylinder, and the other end of the torsion spring is fixedly connected to the outside of the fixed column.

[0013] Preferably, one end of the clamping spring is fixedly connected to the top of the retaining ring, and the other end of the clamping spring is fixedly connected to the bottom of the coupling head.

[0014] Preferably, one end of the crankshaft is rotatably connected to the outer wall of the ash collection hopper, and the other end of the crankshaft is rotatably connected to the end of the fixed box near the ash collection hopper.

[0015] This invention provides a directional dust collection device for lead-containing flue gas. It has the following beneficial effects: 1. This invention, through the combination of an anti-turbulence mechanism and an anti-backflow mechanism, enables the filter bag to be individually covered during cleaning, and guides the airflow to carry dust downwards into the dust collection hopper. It also prevents the dust in the dust collection hopper from being re-entrained and adhering to the filter bag, thereby preventing toxic dust from circulating and adsorbing onto the filter bag and improving the collection efficiency.

[0016] 2. The present invention uses an arch-breaking mechanism to drive the impeller to rotate with gas during filter bag cleaning, which in turn drives the stirring rod to break the arch. At this time, the ash discharge valve is opened to facilitate dust discharge, thereby improving dust discharge efficiency and preventing dust accumulation inside the dust collection hopper. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the box in this invention; Figure 3 This is a schematic diagram of the structure of the folded membrane of the present invention; Figure 4 This is a schematic diagram of the tension spring of the present invention; Figure 5 This is a schematic diagram of the connecting pipe head of the present invention; Figure 6 This is a schematic diagram of the structure of the accordion-type airbag of the present invention; Figure 7 This is a schematic diagram of the internal structure of the fixing cylinder of the present invention; Figure 8This is a schematic diagram of the anti-backflow mechanism of the present invention; Figure 9 This is a schematic diagram of the conical bucket structure of the present invention; Figure 10 This is a schematic diagram of the internal structure of the rotating cylinder of the present invention; Figure 11 This is a schematic diagram of the arch-breaking mechanism of the present invention; Figure 12 This is a schematic diagram of the structure of the active tube of the present invention; Figure 13 This is a schematic diagram of the internal structure of the fixing box of the present invention.

[0018] The components include: 1. Middle housing; 2. Pulse jet main pipe; 3. Pulse jet branch pipe; 4. Nozzle; 5. Anti-turbulence mechanism; 501. Connecting pipe head; 502. Bellows-style airbag; 503. Tension spring; 504. Fixing cylinder; 505. Vent hole; 506. Middle pipe; 507. Sliding ring; 508. Exhaust hole; 509. Return spring; 510. Fixing nut; 511. Movable dust baffle; 512. Folded membrane; 6. Anti-backflow mechanism; 601. Conical hopper; 602. Sealing baffle ring; 603. Dust outlet bottom; 604. 605. Fixed column; 606. Rotating cylinder; 607. Torsion spring; 608. Dust baffle plate; 709. Arch breaking mechanism; 7000. Concentrating cylinder; 7001. Fixed rod; 701. Ventilation connecting pipe; 702. Retaining ring; 703. Movable pipe; 704. Connecting head; 705. Pressing spring; 706. Fixed box; 707. Impeller; 718. Crankshaft; 719. Stirring rod; 710. Rotating sleeve; 711. Stabilizing rod; 712. Stabilizing frame; 713. Ash collection hopper; 714. Clean air outlet duct; 10. Top plate; 11. Air inlet flue. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see the appendix Figure 1 - Appendix Figure 13This invention provides a directional dust collection device for lead-containing flue gas, comprising a middle housing 1, a pulse jet main pipe 2 fixedly connected to one side of the top of the middle housing 1, multiple jet branch pipes 3 fixedly connected to the top of the middle housing 1, multiple nozzles 4 fixedly connected to the outside of the jet branch pipes 3, a top plate 10 fixedly connected to the top of the middle housing 1, an anti-turbulence mechanism 5 provided inside the top plate 10, and a dust collection hopper 8 fixedly connected to the bottom of the middle housing 1, with an anti-backflow mechanism fixedly connected to the top of the inner side of the dust collection hopper 8. Structure 6, anti-turbulence mechanism 5 can cover the outside of the filter bag when cleaning the filter bag, and together with anti-backflow mechanism 6, it prevents the flying dust from adhering to the filter bag with the turbulence. The inside of the dust collection hopper 8 is equipped with an arch breaking mechanism 7, which has the function of breaking the arch. The top of the outer side of the middle box 1 is fixedly connected to the clean air outlet pipe 9, and the outside of the dust collection hopper 8 is fixedly connected to the air inlet flue 11. Multiple venturi tubes are fixed inside the top plate 10, and bag cages are installed at the bottom of the venturi tubes. Filter bags are installed on the outside of the bag cages.

[0021] The anti-turbulence mechanism 5 includes four connecting pipe heads 501. The top of each connecting pipe head 501 is located at the bottom of one of the four nozzles 4. The bottom ends of the four connecting pipe heads 501 are detachably connected to the four corners of the top plate 10. An accordion-style airbag 502 is threaded into the bottom end of each connecting pipe head 501. The accordion-style airbag 502 extends as air enters. A tension spring 503 is fitted around the outside of the accordion-style airbag 502. When no air enters the accordion-style airbag 502, there is no air pressure pushing it. Therefore, under the tension of the tension spring 503, the accordion-style airbag 502 retracts, allowing it to return to its original length. The bottom of the accordion-style airbag 502 is fixedly connected to a fixed cylinder 504, which provides the installation position and allows gas to be discharged. Multiple vent holes 505 are provided at the top of the fixed cylinder 504, allowing gas to enter the interior of the fixed cylinder 504. A central tube 506 is fixedly connected inside the vent holes 505. A sliding ring 507 is slidably connected inside the fixed cylinder 504. The sliding ring 507 can move downwards when pushed by gas. Multiple exhaust holes 508 are provided in the middle of the central tube 506. When the sliding ring 507 is pushed downwards by gas, it can exhaust gas. This allows gas to enter through the exhaust port 508 and exit through the central tube 506. A return spring 509 is installed inside the fixed cylinder 504. After no gas enters the fixed cylinder 504, the return spring 509 pushes the sliding ring 507 upwards. A movable dust baffle 511 is slidably connected inside the central housing 1. The four fixed cylinders 504 are respectively inserted into the four corners of the movable dust baffle 511. A fixing nut 510 is threaded onto the outside of the fixed cylinders 504 and is located at the bottom of the movable dust baffle 511. Multiple folded membranes 512 are fixedly connected to the bottom of the top plate 10. The accordion-style airbag 502 can push the movable dust baffle... The dust plate 511 moves downward, and the movable dust baffle 511 can drive the folded film 512 to move downward, so that the folded film 512 covers the outside of the cloth bag. The bottom of the folded film 512 is fixedly connected to the top of the movable dust baffle 511. One end of the return spring 509 is fixedly connected to the bottom of the inside of the fixed cylinder 504, and the other end of the return spring 509 is fixedly connected to the bottom of the sliding ring 507. The inner side of the sliding ring 507 is slidably connected to the outside of the middle tube 506. The bottom of the middle tube 506 passes through the bottom of the fixed cylinder 504. One end of the tension spring 503 is fixedly connected to the bottom of the top plate 10, and the other end of the tension spring 503 is fixedly connected to the top of the movable dust baffle 511. During bag cleaning, nozzle 4 sprays high-pressure gas. The high-pressure gas from the nozzles 4 located at the four corners above the top plate 10 enters the interior of the connecting pipe head 501 through the connecting pipe head 501, thus blowing the gas into the bellows-type airbag 502. This causes the bellows-type airbag 502 to extend, allowing the movable dust baffle 511 to move downwards. This, in turn, stretches the tension spring 503. When the fixed cylinder 504 contacts the connecting head 706, the bellows-type airbag 502 cannot move downwards. At this time, the gas can enter the interior of the fixed cylinder 504 through the vent hole 505, thereby driving the sliding ring 507 to move downwards and compressing the return spring 509. When the sliding ring 507 moves below the exhaust hole 508, the gas can enter the interior of the middle tube 506 through the middle tube 506. The top of the central tube 506 is blocked by the fixed cylinder 504, while the lower end of the central tube 506 can spray gas, thereby relieving the air pressure in the accordion-type airbag 502 and allowing the movable dust baffle 511 to be located inside the lower part of the central box 1. When the movable dust baffle 511 moves downward, it can drive the folded membrane 512 to stretch, so that the folded membrane 512 covers the bag cage and the cloth bag outside the bag cage. When the nozzle 4 blows out gas, the gas blows and shakes the cloth bag, thereby cleaning the cloth bag. After the gas enters the interior of the folded membrane 512 through the cloth bag, the air pressure in the folded membrane 512 increases due to the obstruction of the anti-backflow mechanism 6. Since the anti-backflow mechanism 6 has only one outlet, the airflow will flow downward and be discharged. Therefore, there will be no turbulence inside the folded membrane 512, and the dust will also be discharged downward with the airflow.

[0022] The anti-backflow mechanism 6 includes multiple conical hoppers 601, all of which are fixedly connected to the inner top of the dust collection hopper 8. A sealing ring 602 is fixedly connected to the outside of each conical hopper 601. The conical hoppers 601 can seal the gap at the connection between the movable dust baffle 511 and the folded membrane 512, and the sealing performance is improved by the anti-blocking effect of the sealing ring 602. A dust outlet bottom 603 is fixedly connected to the bottom of the sealing ring 602, which can discharge airflow and dust. A fixing column 60 is fixedly connected to the outside of the dust outlet bottom 603. 4. A rotating cylinder 605 is rotatably connected to the outside of the fixed column 604. The rotating cylinder 605 provides the installation position. A torsion spring 606 is installed inside the rotating cylinder 605. A dust blocking plate 607 is fixedly connected to the outside of the rotating cylinder 605. Under the action of the reaction force, the torsion spring 606 can drive the dust blocking plate 607 to rotate even when there is no airflow, and cover the bottom of the dust outlet 603. One end of the torsion spring 606 is fixedly connected to the inside of the rotating cylinder 605, and the other end of the torsion spring 606 is fixedly connected to the outside of the fixed column 604. When the movable dust baffle 511 moves downward, the top of the conical hopper 601 inserts into the notch at the connection between the movable dust baffle 511 and the folded membrane 512, while the sealing ring 602 adheres to the bottom of the movable dust baffle 511. This not only maintains the seal but also prevents the conical hopper 601 from inserting into the interior of the folded membrane 512, thus affecting the seal. When the air pressure in the folded membrane 512 increases, it can blow open the dust baffle 607, causing it to rotate. The rotation of the dust baffle 607 drives the rotating cylinder 605 to rotate and compress the torsion. The dust will be ejected through the dust outlet bottom 603 following the airflow. Although the airflow can blow up the dust in the dust collection hopper 8, the dust blown up by the turbulent flow in the dust collection hopper 8 will not adhere to the outside of the filter bag because the filter bag is covered by the folded membrane 512. Since the cross-section of the dust outlet bottom 603 is small and a mixture of gas and dust is continuously ejected, the dust blown up by the turbulent flow in the dust collection hopper 8 will not enter the interior of the folded membrane 512 through the dust outlet bottom 603. Therefore, it can avoid the secondary mixing and flying of dust during dust removal, and the recirculation of toxic dust to the filter bag, which would reduce the collection efficiency.

[0023] The arch-breaking mechanism 7 includes a concentrator 701. Multiple fixed rods 702 are fixedly connected to the outside of the concentrator 701. The ends of the fixed rods 702 away from the concentrator 701 are fixedly connected to the inside of the ash collection hopper 8. The fixed rods 702 can be connected to the outside of the concentrator 701. Four ventilation pipes 703 are fixedly connected to the outside of the concentrator 701. The concentrator 701 can collect the gas discharged from the multiple ventilation pipes 703. A movable pipe 705 is slidably connected to the other end of each ventilation pipe 703. A connecting head 706 is fixedly connected to the top of the movable pipe 705. The connecting head 706 can abut against the bottom of the fixed cylinder 504. The movable pipe 705 is sleeved on the outside. A retaining spring 707 is included. The retaining spring 707 uses its own reaction force to exert an upward reaction force on the connecting head 706, thus blocking the bottom of the retaining ring 704. The extension thrust of the bellows-type airbag 502 and the reaction force of the retaining spring 707 tightly compress the connecting head 706 against the bottom of the fixed cylinder 504, improving sealing. Simultaneously, the compression of the retaining spring 707 restricts the fixed cylinder 504 from further downward movement. A retaining ring 704 is externally fixed to the other end of the vent pipe 703. The retaining ring 704 acts as a limit, allowing the retaining spring 707 to function. The external fixing of the ash hopper 8... A mounting box 708 is connected, providing an installation position. An impeller 709 is rotatably connected inside the mounting box 708, rotating under the influence of airflow. A crankshaft 710 is fixedly connected to the center of the impeller 709, driving the crankshaft 710 to rotate. An agitator 711 is rotatably connected to the center of the crankshaft 710, and a rotating sleeve 712 is slidably connected to the outside of the agitator 711. The rotating sleeve 712 restricts the movement trajectory of the bottom of the agitator 711. Multiple stabilizing rods 713 are rotatably connected to the outside of the rotating sleeve 712, mounting the rotating sleeve 712. The multiple stabilizing rods 713 are located away from the rotating sleeve 712. One end of the moving sleeve 712 is fixedly connected to the inside of the ash collection hopper 8. A stabilizing frame 714 is fixedly connected to the inside of the air intake flue 11. The stabilizing frame 714 can stabilize the crankshaft 710. The end of the crankshaft 710 away from the fixed box 708 is rotatably connected to the inside of the stabilizing frame 714. A pipe is fixedly connected between the top of the fixed box 708 and the bottom of the concentrating cylinder 701. One end of the clamping spring 707 is fixedly connected to the top of the retaining ring 704. The other end of the clamping spring 707 is fixedly connected to the bottom of the connecting head 706. One end of the crankshaft 710 is rotatably connected to the outer wall of the ash collection hopper 8. The other end of the crankshaft 710 is rotatably connected to the end of the fixed box 708 near the ash collection hopper 8. When the fixed cylinder 504 contacts the coupling head 706, it first pushes the coupling head 706 and the movable tube 705 downwards, compressing the clamping spring 707. Utilizing the reaction force of the clamping spring 707 and the thrust of the gas in the bellows-type airbag 502, the bottom of the fixed cylinder 504 is tightly pressed against the inside of the coupling head 706, improving the sealing performance. The gas ejected from the fixed cylinder 504 enters the interior of the concentrator 701 through the movable tube 705 and the venting connection tube 703, and is discharged into the interior of the concentrator 708 through the pipe between the bottom of the concentrator 701 and the fixed box 708. This drives the impeller 709 to rotate. After the impeller 709 rotates, it drives the crankshaft 710 to rotate, which in turn drives the top of the stirring rod 711 to rotate with the crankshaft 710. Under the limitation of the rotating sleeve 712, the bottom of the stirring rod 711 can move up and down continuously and swing, thereby playing a role in breaking the arch.

[0024] Working principle: During bag cleaning, nozzles 4 spray high-pressure gas. The high-pressure gas from the nozzles 4 located at the four corners above the top plate 10 enters the interior of the connecting pipe head 501 through the connecting pipe head 501, thus blowing the gas into the bellows-type airbag 502. This causes the bellows-type airbag 502 to extend, allowing the movable dust baffle 511 to move downwards. This, in turn, stretches the tension spring 503. When the fixed cylinder 504 contacts the connecting head 706, the bellows-type airbag 502 cannot move downwards. At this time, the gas can enter the interior of the fixed cylinder 504 through the vent hole 505, thereby driving the sliding ring 507 to move downwards and compressing the return spring 509. When the sliding ring 507 moves below the exhaust hole 508, the gas can enter the interior of the middle tube 506 through the middle tube 506. Because the top of the central tube 506 is blocked by the fixed cylinder 504, the lower end of the central tube 506 can spray gas, thereby relieving the air pressure in the accordion-type airbag 502 and allowing the movable dust baffle 511 to be located inside the lower part of the central box 1. When the movable dust baffle 511 moves downward, it can drive the folded membrane 512 to stretch, so that the folded membrane 512 covers the bag cage and the cloth bag outside the bag cage. When the nozzle 4 blows out gas, the gas blows the cloth bag to shake, thereby cleaning the cloth bag. After the gas enters the interior of the folded membrane 512 through the cloth bag, the air pressure in the folded membrane 512 increases due to the obstruction of the conical hopper 601. Since the dust outlet bottom 603 is the only outlet, the airflow will flow downward and be discharged. Therefore, there will be no turbulence inside the folded membrane 512, and the dust will also be discharged downward with the airflow. When the movable dust baffle 511 moves downward, the top of the conical hopper 601 inserts into the notch at the connection between the movable dust baffle 511 and the folded membrane 512, while the sealing ring 602 adheres to the bottom of the movable dust baffle 511. This not only maintains the seal but also prevents the conical hopper 601 from inserting into the interior of the folded membrane 512, thus affecting the seal. When the air pressure in the folded membrane 512 increases, it can blow open the dust baffle 607, causing it to rotate. The rotation of the dust baffle 607 drives the rotating cylinder 605 to rotate and compress the torsion. Spring 606, dust will be ejected through dust outlet bottom 603 with the airflow. At this time, although the airflow can blow up the dust in dust collection hopper 8, the dust blown up by the turbulent flow in dust collection hopper 8 will not adhere to the outside of the filter bag because the filter bag is covered by pleated membrane 512. Because the cross-section of dust outlet bottom 603 is small and a mixture of gas and dust is continuously ejected, the dust blown up by the turbulent flow in dust collection hopper 8 will not enter the interior of pleated membrane 512 through dust outlet bottom 603. Therefore, it can avoid secondary mixing and flying of dust during dust cleaning, and prevent toxic dust from circulating and adsorbing the filter bag, reducing the collection efficiency. When the fixed cylinder 504 contacts the coupling head 706, it first pushes the coupling head 706 and the movable tube 705 downwards, compressing the clamping spring 707. Utilizing the reaction force of the clamping spring 707 and the thrust of the gas in the bellows-type airbag 502, the bottom of the fixed cylinder 504 is tightly pressed against the inside of the coupling head 706, improving the sealing performance. The gas ejected from the fixed cylinder 504 enters the interior of the concentrator 701 through the movable tube 705 and the venting connection tube 703, and is discharged into the interior of the concentrator 708 through the pipe between the bottom of the concentrator 701 and the fixed box 708. This drives the impeller 709 to rotate. After the impeller 709 rotates, it drives the crankshaft 710 to rotate, which in turn drives the top of the stirring rod 711 to rotate with the crankshaft 710. Under the limitation of the rotating sleeve 712, the bottom of the stirring rod 711 can move up and down continuously and swing, thereby playing a role in breaking the arch.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A directional dust collection device for lead-containing flue gas, comprising a middle housing (1), characterized in that, A pulse jet manifold (2) is fixedly connected to one side of the top of the middle box (1). Multiple jet branch pipes (3) are fixedly connected to the top of the middle box (1). Multiple nozzles (4) are fixedly connected to the outside of the jet branch pipes (3). A top plate (10) is fixedly connected to the top of the middle box (1). An anti-turbulence mechanism (5) is provided inside the top plate (10). A dust collection hopper (8) is fixedly connected to the bottom of the middle box (1). An anti-backflow mechanism (6) is fixedly connected to the top inside the dust collection hopper (8). An arch-breaking mechanism (7) is provided inside the dust collection hopper (8). A clean air outlet pipe (9) is fixedly connected to the top outside of the middle box (1). An air inlet flue (11) is fixedly connected to the outside of the dust collection hopper (8).

2. The directional dust collection device for lead-containing flue gas according to claim 1, characterized in that, The anti-turbulence mechanism (5) includes four connecting pipe heads (501). The bottom ends of the four connecting pipe heads (501) are detachably connected to the four corners of the top plate (10). The bottom ends of the connecting pipe heads (501) are internally threaded with bellows-type airbags (502). The bellows-type airbags (502) are externally fitted with tension springs (503). The bottom of the bellows-type airbags (502) is fixedly connected to a fixing cylinder (504). The top of the fixing cylinder (504) has multiple ventilation holes (505). The ventilation holes (505) are internally fixedly connected to a central tube (506). The fixing cylinder (504) is internally slidably connected to a sliding ring (507). The middle tube (506) has multiple exhaust holes (508) in the middle. The fixed cylinder (504) is equipped with a return spring (509). The middle box (1) is slidably connected to a movable dust baffle (511). The four fixed cylinders (504) are respectively inserted into the four corners of the movable dust baffle (511). The fixed cylinder (504) is threaded with a fixing nut (510). The fixing nut (510) is located at the bottom of the movable dust baffle (511). The bottom of the top plate (10) is fixedly connected to multiple folded membranes (512). The bottom of the folded membranes (512) is fixedly connected to the top of the movable dust baffle (511).

3. The directional dust collection device for lead-containing flue gas according to claim 1, characterized in that, The anti-backflow mechanism (6) includes multiple conical hoppers (601), each of which is fixedly connected to the inner top of the dust collection hopper (8). A sealing ring (602) is fixedly connected to the outside of each conical hopper (601), and a dust outlet bottom (603) is fixedly connected to the bottom of the sealing ring (602). A fixed column (604) is fixedly connected to the outside of the dust outlet bottom (603), and a rotating cylinder (605) is rotatably connected to the outside of the fixed column (604). A torsion spring (606) is provided inside the rotating cylinder (605), and a dust blocking plate (607) is fixedly connected to the outside of the rotating cylinder (605).

4. The directional dust collection device for lead-containing flue gas according to claim 1, characterized in that, The arch-breaking mechanism (7) includes a central cylinder (701), to which multiple fixed rods (702) are fixedly connected. One end of each fixed rod (702) away from the central cylinder (701) is fixedly connected to the inner side of the ash collection hopper (8). Four ventilation connecting pipes (703) are fixedly connected to the outside of the central cylinder (701). A movable pipe (705) is slidably connected to the other end of each ventilation connecting pipe (703). A connecting head (706) is fixedly connected to the top of the movable pipe (705). A retaining spring (707) is sleeved on the outside of the movable pipe (705). A retaining ring (704) is fixedly connected to the other end of each ventilation connecting pipe (703). A fixed box (708) is fixedly connected to the outside of the ash collection hopper (8). An impeller (709) is rotatably connected inside the ash collection hopper (8). A crankshaft (710) is fixedly connected to the middle of the impeller (709). An agitator (711) is rotatably connected to the middle of the crankshaft (710). A rotating sleeve (712) is slidably connected to the outside of the agitator (711). Multiple stabilizing rods (713) are rotatably connected to the outside of the rotating sleeve (712). The ends of the multiple stabilizing rods (713) away from the rotating sleeve (712) are all fixedly connected to the inside of the ash collection hopper (8). A stabilizing frame (714) is fixedly connected inside the air intake flue (11). The end of the crankshaft (710) away from the fixed box (708) is rotatably connected to the inside of the stabilizing frame (714). A pipe is fixedly connected between the top of the fixed box (708) and the bottom of the collection cylinder (701).

5. The directional dust collection device for lead-containing flue gas according to claim 2, characterized in that, One end of the return spring (509) is fixedly connected to the bottom of the inner end of the fixed cylinder (504), and the other end of the return spring (509) is fixedly connected to the bottom of the sliding ring (507).

6. The directional dust collection device for lead-containing flue gas according to claim 2, characterized in that, The inner side of the sliding ring (507) is slidably connected to the outside of the middle tube (506), and the bottom of the middle tube (506) penetrates the bottom of the fixed cylinder (504).

7. The directional dust collection device for lead-containing flue gas according to claim 2, characterized in that, One end of the tension spring (503) is fixedly connected to the bottom of the top plate (10), and the other end of the tension spring (503) is fixedly connected to the top of the movable dust baffle (511).

8. The directional dust collection device for lead-containing flue gas according to claim 3, characterized in that, One end of the torsion spring (606) is fixedly connected to the inside of the rotating cylinder (605), and the other end of the torsion spring (606) is fixedly connected to the outside of the fixed column (604).

9. A directional dust collection device for lead-containing flue gas according to claim 4, characterized in that, One end of the clamping spring (707) is fixedly connected to the top of the retaining ring (704), and the other end of the clamping spring (707) is fixedly connected to the bottom of the coupling head (706).

10. A directional dust collection device for lead-containing flue gas according to claim 4, characterized in that, One end of the crankshaft (710) is rotatably connected to the outer wall of the ash collection hopper (8), and the other end of the crankshaft (710) is rotatably connected to the end of the fixed box (708) near the ash collection hopper (8).

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