A filter unit in-line dust collector and method for high temperature flue gas

Abstract

The application relates to the technical field of flue gas dust removal and filtration, in particular to a filter unit series dust remover and method for high-temperature flue gas, wherein a dust collecting hopper is arranged at the bottom of a first chamber of the dust removal device, a plurality of through holes are formed in a layer plate, filter cartridges are arranged in the through holes, a flue gas inlet is arranged on the side wall of the first chamber, and a flue gas outlet is arranged on the side wall of a second chamber; a fixing mechanism is arranged at the bottom of the first chamber, the bottom of the filter cartridge is sealingly arranged on the fixing mechanism, a dust cleaning mechanism is arranged in the filter cartridge, a motor is arranged at the outer top end of a third chamber, a threaded shaft is arranged at the output end of the motor, the threaded shaft penetrates through the third chamber and the second chamber and extends to the inside of the first chamber, and the threaded shaft in the third chamber is driven to each group of dust cleaning mechanisms through a gear assembly; through the integrated and collaborative mechanism of dust cleaning, dust capturing and dust unloading, the filter cartridge is continuously cleaned and the whole-process closed-loop collection of dust is realized under the non-stop state, and the secondary pollution of dust in the dust cleaning process is avoided.

Description

Technical Field

[0001] This invention relates to the field of flue gas dust removal and filtration technology, specifically to a series-connected dust collector and method for high-temperature flue gas. Background Technology

[0002] Flue gas is mainly generated in high-temperature processes such as fuel combustion, metal smelting, chemical reactions, and building material processing in industrial production. It contains a large amount of harmful components such as dust particles, acidic gases, heavy metals, and organic pollutants. If it is emitted directly without effective filtration, the dust particles in these high-temperature flue gases will seriously pollute the atmospheric environment, leading to regional air quality deterioration and frequent smog. At the same time, the heavy metal dust carried in the flue gas will cause soil and water pollution after settling, and will threaten ecological security through bioaccumulation in the food chain.

[0003] Chinese patent document (publication number: CN117398798A) discloses a kiln flue gas dust removal and filtration device and its filtration method, relating to the field of flue gas dust removal and filtration technology. The device includes: a dust removal tower, wherein multiple baffle plates are fixed at equal intervals from top to bottom along the inner wall of the dust removal tower; an extended turbulence mechanism, comprising multiple extended turbulence components connected in sequence and fixed rods penetrating the multiple extended turbulence components, wherein the multiple extended turbulence components are respectively positioned between two adjacent baffle plates; and a spraying mechanism installed on the dust removal tower. This invention significantly extends the flow path of the kiln flue gas and prolongs the residence time of the kiln flue gas between two adjacent baffle plates. Simultaneously, the porous turbulence plates on the extended turbulence components effectively agitate and impact the washing liquid and kiln flue gas, forming turbulence, greatly improving the mixing effect between the washing liquid and the kiln flue gas, and thus improving the treatment effect of the kiln flue gas.

[0004] Existing flue gas dust removal devices generally suffer from the problem of disorderly scattering of dust detached from the filter cartridge surface during pulse cleaning, making it difficult to collect effectively. This results in low cleaning efficiency and a high risk of secondary pollution. At the same time, traditional dust collection mechanisms lack effective dust removal methods, causing dust to accumulate on the filter plate surface and clog the pores, leading to reduced air permeability and dust collection efficiency. Furthermore, the dust collection structure of existing devices tends to re-lift the already dislodged dust during upward reset and cannot provide a smooth falling channel for the continuously scattered dust in the chamber, causing dust to remain and disperse in the chamber, exacerbating the risk of secondary pollution. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a series-connected dust collector and method for high-temperature flue gas. It utilizes an openable dust collection mechanism driven by a lifting frame within the first chamber, working in conjunction with a cleaning mechanism to achieve synchronous dust collection and cleaning. The lifting frame moves up and down via the rotation of a threaded shaft. During downward movement, it drives the first and second filter plates to a horizontally closed state to intercept and collect dust detached from the filter cartridge. A curved disk at the bottom of the threaded shaft triggers a vibration component to apply high-frequency vibration to the filter plates, causing the dust to quickly fall into the ash hopper. During upward resetting, the guide rod in the flipping component guides the first filter plate to automatically flip around the shaft to an open state. This avoids re-lifting the already dislodged dust and provides a vertical channel for continuously falling dust within the chamber, achieving a closed-loop integrated system of cleaning, dust collection, and dust removal. This effectively solves the problems of disordered dust diffusion, filter plate clogging, and secondary pollution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A series-connected dust collector for high-temperature flue gas includes multiple dust collection devices connected in series in a flue gas treatment duct. The dust collection devices comprise a third chamber, a second chamber, and a first chamber, sealed sequentially from top to bottom. A dust collection hopper is located at the bottom of the first chamber. Several through-holes are formed on a shelf between the second and first chambers, and filter cartridges are installed within these through-holes. The openings of the filter cartridges communicate with the second chamber. A flue gas inlet is located on the side wall of the first chamber, and a flue gas outlet is located on the side wall of the second chamber. A fixing mechanism is located at the bottom of the first chamber, and the bottom of the filter cartridges is sealed and mounted on the fixing mechanism. A dust removal mechanism is located inside the filter cartridges. A motor is located at the top of the third chamber, and a threaded shaft is located at the output end of the motor. The threaded shaft passes through the third and second chambers and extends into the first chamber. The threaded shaft located in the third chamber is driven by a gear assembly to each dust removal mechanism. A dust collection mechanism is screwed onto the threaded shaft located inside the first chamber. Under normal operating conditions, the dust collection mechanism captures the scattered dust processed by the dust removal mechanism and then shakes it into the dust collection hopper.

[0007] Preferably, the fixing mechanism includes a frame fixed to the bottom of the first chamber, with multiple trays inside the frame, adjacent trays fixedly connected, and the trays connected to the frame by connecting rods. The trays have grooves, and a limiting hole is opened in the middle of the grooves. The bottom end of the filter cartridge is set as an open structure, and the bottom of the filter cartridge extends outward to form an outer edge. The outer edge of the bottom end of the filter cartridge is sealed and fixed in the groove by a pressure ring, and the outer edge of the top of the filter cartridge is sealed and fixed to the top of the shelf.

[0008] Preferably, the dust removal mechanism includes a hollow rotating rod, one end of which is mounted in the limiting hole of the tray via an angular contact ball bearing, and the other end of which passes through the second chamber and the third chamber and extends to the outside of the top plate of the third chamber. The end of the rotating rod is connected to a high-pressure air source via a rotary joint. The through-hole of the rotating rod and the third chamber is connected by a rotary bearing. An air jet pipe is provided on the outer periphery of the rotating rod located inside the filter cartridge, and a nozzle is provided on the outer periphery of the air jet pipe. The air jet pipe is connected to the hollow rotating rod.

[0009] Preferably, the gear assembly includes a driving gear, a driven gear, and an idler gear installed inside the third chamber. The driving gear is fixedly sleeved on the smooth section of the threaded shaft, and the driven gear is fixedly sleeved on the rotating rod. The driving gear and the adjacent driven gear are driven by meshing through the idler gear, and the driven gear at the far end is driven by meshing with the adjacent driven gear through a second idler gear.

[0010] Preferably, the dust collection mechanism includes a lifting frame and guide rods. Multiple guide rods are fixedly installed near the side wall in the first chamber, and the edge of the lifting frame is slidably sleeved on the guide rods. Multiple clearance rings are fixedly installed inside the lifting frame, and the clearance rings are sleeved on the outer periphery of the filter cartridge. A guide plate is fixedly installed in the middle of the lifting frame, and a threaded hole is opened on the guide plate. The threaded section of the threaded shaft is screwed into the threaded hole of the guide plate. A filter plate is installed inside the lifting frame, and a shaking component is installed at the bottom end of the threaded shaft.

[0011] Preferably, the vibration component includes a guide block and a curved disk. The guide block is fixed between several trays by welding. The smooth end of the bottom of the threaded shaft rotates through the guide block. The curved disk is fixed at the bottom of the threaded shaft. The top outer periphery of the curved disk has multiple arc-shaped plates arranged in an array, forming an interlocking annular slope. Several telescopic rods slide through the edge of the guide block. The bottom end of the telescopic rod abuts against the arc-shaped plate. A wing plate extends outward from a certain distance from the bottom end of the telescopic rod. A second return spring is slidably sleeved on the telescopic rod. The two ends of the second return spring abut against the wing plate and the bottom end of the guide block, respectively. A contact rod is set at the top of the telescopic rod. The contact rod is connected to the telescopic rod by a buffer spring. The bottom end of the threaded section of the threaded shaft and the contact rod are on the same plane when the threaded section rises to its highest point. A first return spring is sleeved at the bottom of several guide rods. The highest point of the first return spring in its non-stressed state is on the same plane as the bottom end of the threaded section of the threaded shaft.

[0012] Preferably, several of the avoidance rings and guide plates form a linearly arranged and spaced fixed body, which is connected to the lifting frame by welding. The guide plate is located in the middle of the fixed body. A filter plate is arranged between the linearly arranged fixed bodies. A rotating shaft is fixed at both ends of the filter plate. The rotating shaft rotates through the side wall of the lifting frame and the end of the rotating shaft extends into the side plate of the first chamber. A flipping component is arranged inside the side plate.

[0013] Preferably, the flipping assembly includes a guide rod and several guide grooves opened vertically along the side plate. The rotating shaft on each filter plate extends into the guide groove. A torsion spring is provided between the rotating shaft and the lifting frame. A sleeve is slidably provided on the rotating shaft. The keyway provided on the inner wall of the sleeve slides in cooperation with the spline on the outer peripheral surface of the rotating shaft. The guide rod is fixed on the outer periphery of the sleeve. A first traction groove and a second traction groove are opened in parallel on one side wall inside the guide groove. The second traction groove is deeper than the first traction groove. The bottom end of the second traction groove is connected to the first traction groove through a first transition traction groove. The top end of the second traction groove is connected to the first traction groove through a second transition traction groove. Under the action of the torsion spring, the guide rod slides against the traction groove. When the guide rod passes through traction grooves of different depths, it rotates, causing the filter plate to rotate at a certain angle, realizing the switching between horizontal closure and inclined opening of the filter plate.

[0014] Preferably, the length of the second traction groove is less than that of the first traction groove, both ends of the second traction groove are located inside the end of the first traction groove and maintain a distance, and the connection between the first transition traction groove and the second transition traction groove and the second traction groove is smoothly connected; the connection between the first transition traction groove and the first traction groove is lower than the lowest point of the first traction groove, and the connection between the second transition traction groove and the first traction groove is higher than the lowest point of the first traction groove.

[0015] Preferably, a series-connected dust removal method for high-temperature flue gas filters includes the following steps: S1. Flue gas enters the first chamber through the inlet pipe. The dust in the flue gas is initially intercepted on the outer wall of the filter cartridge. The purified airflow passes through the inside of the filter cartridge and enters the second chamber through the through-hole, and then is discharged to the next process through the outlet pipe. S2. When the dust accumulation on the surface of the filter cartridge reaches the set value, the motor is started. The motor drives the rotating rod to rotate through the gear assembly, which drives the jet pipe to spray pulse airflow onto the inner wall of the filter cartridge for back-blowing and dust removal, causing the dust accumulation on the surface of the filter cartridge to peel off and fall downward in the first chamber. S3. The motor synchronously drives the threaded shaft to rotate. Through the threaded engagement, the lifting frame moves the filter plate in a horizontal closed state. During the downward movement, it captures a large area of ​​scattered dust that is peeled off from the filter cartridge and transports the dust to the vicinity of the dust collection hopper. S4. During the process of the lifting frame descending to the bottom position, the curved disk at the bottom of the threaded shaft continuously triggers the telescopic rod to generate high-frequency micro-vibration. The vibration force is transmitted to the guide plate and filter plate through the contact rod, which applies a continuous shaking action to the collected dust, causing the dust to quickly detach and fall into the dust collection hopper. S5. After the ash is unloaded, the motor rotates in the opposite direction to drive the threaded shaft to rotate in the opposite direction. The lifting frame drives the dust collection mechanism to reset upward. During the upward movement, the guide rod is guided by the traction groove in the side plate and automatically drives the filter plate to rotate around the shaft to the open shape, providing a vertical channel for the dust that is continuously scattered in the first chamber, so that it can directly pass through the open filter plate and fall into the ash hopper. S6. After the lifting frame is reset to the initial position, the first filter plate returns to the horizontal closed state under the guidance of the guide rod, and the system enters the next dust removal cycle to achieve continuous dust removal of flue gas.

[0016] 1. The dust removal device of the present invention achieves continuous cleaning of the filter cartridge and closed-loop collection of dust throughout the entire process without stopping the machine through an integrated synergistic mechanism of dust removal, dust collection, and dust unloading. Specifically, when the pulse airflow blows the filter cartridge to clean it, the motor starts simultaneously to drive the lifting frame to move downward. The dust collection mechanism then unfolds to intercept the scattered dust and impurities peeled off from the surface of the filter cartridge and transports them in an orderly manner to the dust collection hopper for centralized storage. After the dust collection mechanism completes the downward collection, the motor continues to run to trigger the shaking component, which causes the dust attached to the filter plate to be quickly unloaded, effectively avoiding secondary dust dispersion and pollution during the cleaning process. After the dust is unloaded, the motor rotates in the opposite direction to reset the dust collection mechanism upward. At the same time as the lifting frame moves upward, the flipping component is automatically triggered to drive the filter plate to flip to a certain angle to open. This reduces the attachment of scattered dust in the first chamber to the filter plate and provides a smooth passage for dust to fall into the dust collection hopper in subsequent cleaning cycles.

[0017] 2. The dust collection component of this invention works in conjunction with the dust removal mechanism to achieve all-time coordinated protection of the dust removal process through the intelligent opening and closing action of the filter plate. Specifically, when the filter cartridge is pulse-jet cleaning in the first chamber, the lifting frame drives the filter plate to be in a closed state, i.e., horizontally unfolded and descending. At this time, the filter plate captures the dust and impurities that are peeled off from the surface of the filter cartridge, effectively preventing the disorderly diffusion of dust under the action of gravity and airflow, and avoiding the secondary pollution problem commonly encountered in the dust removal of traditional dust collectors. When the dust collection mechanism completes the downward collection and the dust is discharging by the vibration component, when the lifting frame returns to its original position, the guide rod, guided by the specific traction groove trajectory in the side plate, automatically triggers the filter plate to flip to the open state. At this time, the filter plate presents an open shape at a certain angle, which not only allows the unloaded dust to pass through smoothly without being lifted again, but also provides a vertically penetrating falling channel for continuous dust removal in the first chamber, so that the newly peeled dust can directly pass through the open filter plate and quickly reach the bottom of the dust collection hopper.

[0018] 3. The vibration component of this invention triggers a telescopic rod to generate high-frequency micro-vibration through the continuous rotation of the curved disk at the bottom of the threaded shaft. The vibration force is then transmitted to the guide plate and filter plate via the contact rod. During the entire working cycle of the dust collection mechanism, a continuous vibration effect is applied to the filter plate, causing the dust adhering to the surface and pores of the filter plate to be quickly detached and smoothly discharged into the dust collection hopper. This effectively avoids the problems of pore blockage and reduced air permeability caused by the gradual accumulation of dust in traditional fixed dust collection devices. At the same time, since the vibration force comes from the continuous rotation of the threaded shaft rather than an independent drive device that starts and stops intermittently, the vibration frequency is stable and the energy consumption is extremely low, achieving continuous dust removal without the need for an additional motor or air source.

[0019] 4. The flipping component of this invention, through the cooperation of multiple interconnected traction grooves and guide rods set in the side plate, realizes the automatic flipping action of the filter plate when the lifting frame moves upward and resets. This changes the filter plate from a horizontal closed state to an open state at a certain angle. This allows the unloaded dust to pass through smoothly without being lifted again, and provides a vertical channel for the dust generated by subsequent dust cleaning in the first chamber to reach the dust collection hopper directly, effectively avoiding the retention and secondary dispersion of dust in the chamber. At the same time, since the flipping action is achieved entirely by the passive following of the guide rod in the specific traction groove trajectory, no additional drive device, sensor or control signal is required. This makes the flipping mechanism simple in structure, reliable in action and almost zero in energy consumption. Even in long-term high-temperature dust environment, it is not easy to jam or fail. More importantly, the rapid attitude change process of the filter plate from horizontal to flipped generates an instantaneous inertial throwing force, which significantly improves the cleaning ability of attached dust. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the external structure of the single-unit dust removal device of the present invention; Figure 2 This is a three-dimensional schematic diagram of the internal structure of the single-unit dust removal device of the present invention; Figure 3 This is a three-dimensional schematic diagram of the disassembled structure of the dust removal mechanism of the dust removal device of the present invention; Figure 4 This is a three-dimensional schematic diagram of the gear assembly installation structure of the dust removal device of the present invention; Figure 5 This is a three-dimensional schematic diagram of the installation structure of the dust collection mechanism of the dust removal device of the present invention; Figure 6 This is a three-dimensional schematic diagram of the disassembled dust collection mechanism of the dust removal device of the present invention; Figure 7 This is a three-dimensional schematic diagram of the disassembled structure of the shaking component of the dust removal device of the present invention; Figure 8 This is a schematic diagram of the filter plate in a horizontally closed state of the dust removal device flipping assembly of the present invention. Figure 9 This is a schematic diagram of the tilted opening state of the filter plate of the dust removal device flipping assembly of the present invention. Figure 10 This is a schematic diagram of the traction groove layout structure of the dust removal device flipping assembly of the present invention; Figure 11 This is a schematic diagram of the guide rod installation structure of the dust removal device flipping assembly of the present invention; In the diagram: First chamber - 11; Second chamber - 12; Third chamber - 13; Ash hopper - 14; Smoke inlet - 15; Smoke outlet - 16; Motor - 17; Rotary bearing - 18; Rotary joint - 19; Filter cartridge - 20; Tray - 21; Groove - 22; Pressure ring - 23; Frame - 24; Guide block - 25; Threaded shaft - 26; Rotating rod - 27; Jet pipe - 28; Angular contact ball bearing - 29; Drive gear - 30; Driven gear - 31; Idler gear - 32; Shelf plate - 33; Through opening - 34; Guide rod - 35; Lifting frame - 36; Clearance ring - 37; Guide plate - 38; Second filter plate - 39; First filter plate - 40; Rotating shaft - 41; First return spring - 42; Curved disc - 43; Arc plate - 44; Wing plate - 45; Telescopic rod - 46; Contact rod - 47; Side plate - 48; Guide rod - 49; First traction groove - 50; Second traction groove - 51; First transition traction groove - 52; Second transition traction groove - 53; Guide groove - 54; Spline - 55; Sleeve - 56; Torsion spring - 57. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0022] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Figures 1-11As shown, a series-connected dust collector for high-temperature flue gas includes multiple dust collection devices connected in series in a flue gas treatment duct. Each dust collection device includes a third chamber 13, a second chamber 12, and a first chamber 11, which are sealed sequentially from top to bottom. A dust collection hopper 14 is located at the bottom of the first chamber 11. Several through-holes 34 are opened on a shelf 33 between the second chamber 12 and the first chamber 11. Filter cartridges 20 are installed within the through-holes 34, and the openings of the filter cartridges 20 communicate with the second chamber 12. A flue gas inlet 15 is provided on the side wall of the first chamber 11, and a flue gas outlet 16 is provided on the side wall of the second chamber 12. A fixing mechanism is provided at the bottom of the first chamber 11, and the bottom of the filter cartridge 20 is sealed and installed on the fixing mechanism. A dust removal mechanism is provided inside the filter cartridge 20. A motor 17 is provided at the top of the outside of the third chamber 13. A threaded shaft 26 is provided at the output end of the motor 17. The threaded shaft 26 passes through the third chamber 13 and the second chamber 12 and extends into the interior of the first chamber 11. The threaded shaft 26 located in the third chamber 13 is driven to each dust removal mechanism through a gear assembly. A dust collection mechanism is screwed onto the threaded shaft 26 located inside the first chamber 11. Under normal working conditions, the dust collection mechanism captures the scattered dust processed by the dust removal mechanism and then shakes it into the dust collection hopper 14. Industrial flue gas dust removal is a crucial aspect of environmental governance. Existing dust collectors mostly employ single-stage filtration, which suffers from uneven filter media load and insufficient reliability. This invention connects multiple dust removal devices (filtration units) in series within the treatment flue. In the pretreatment stage, high-temperature flue gas can first enter a waste heat boiler or cooling tower for cooling. Subsequently, it passes through a cyclone preheater to separate coarse dust particles. Then, a flow equalization device evenly distributes the flue gas flow rate, and a temperature regulation system controls the flue gas temperature to prevent condensation or burnout of the filter media. The pretreated flue gas then enters the dust removal device (filtration unit) of this invention, significantly improving filtration efficiency.

[0024] Furthermore, the fixing mechanism includes a frame 24 fixed to the bottom of the first chamber 11, a plurality of trays 21 are provided inside the frame 24, adjacent trays 21 are fixedly connected, and the trays 21 are connected to the frame 24 by connecting rods. The trays 21 have grooves 22, and a limiting hole is opened in the middle of the grooves 22. The bottom end of the filter cartridge 20 is set as an open structure, and the bottom of the filter cartridge 20 extends outward to form an outer edge. The outer edge of the bottom end of the filter cartridge 20 is sealed and fixed in the groove 22 by a pressure ring 23, and the outer edge of the top of the filter cartridge 20 is sealed and fixed to the top of the shelf 33. The outer edge of the top of the filter cartridge 20 is fixedly connected to the shelf 33 by a second pressure ring. The second pressure ring is connected by bolts and the connection is sealed with a gasket. The pressure ring 23 is connected to the groove of the tray 21 by bolts, and the connection is sealed with a sealing gasket; The top of the connecting rod adopts a rounded curved surface structure, which facilitates dust to fall into the dust collection hopper 14 and reduces dust accumulation; When the flue gas enters the first chamber 11 through the inlet 15, it is filtered by the filter cartridge 20 and then the clean flue gas enters the second chamber 12 and is discharged from the outlet 16. Dust and particles are separated by the filter cartridge 20 and fall into the ash hopper 14.

[0025] Furthermore, the dust removal mechanism includes a hollow rotating rod 27. One end of the rotating rod 27 is installed in the limiting hole of the tray 21 through an angular contact ball bearing 29. The other end of the rotating rod 27 passes through the second chamber 12 and the third chamber 13 and extends to the outside of the top plate of the third chamber 13. The end of the rotating rod 27 is connected to a high-pressure air source through a rotating joint 19. The through-hole of the rotating rod 27 and the third chamber 13 is connected by a rotating bearing 18. An air jet pipe 28 is provided on the outer periphery of the rotating rod 27 located inside the filter cartridge 20. A nozzle is provided on the outer periphery of the air jet pipe 28. The air jet pipe 28 is connected to the hollow rotating rod 27. The high-pressure gas source is connected to the rotary joint 19 via an electromagnetic pulse valve. The electromagnetic pulse valve opens intermittently, causing the high-pressure gas to be sprayed onto the inner wall of the filter cartridge 20 in a pulse manner through the rotating rod 27 and the jet pipe 28, so that the dust accumulated on the outside of the filter cartridge 20 can be quickly removed.

[0026] A pressure sensor is installed at the filter cartridge. The pressure sensor, electromagnetic pulse valve, motor 17, etc. are all connected to the main unit. The main unit is connected to the PLC control system. When the pressure sensor reaches the threshold, the electromagnetic pulse valve and motor 17 are activated.

[0027] It should be noted that both motor 17 and the main unit are connected to an external power source. Motor 17, the main unit, the PLC control system, the electromagnetic pulse valve, and the external air source are all conventional settings and belong to existing technology. The principle will not be explained in detail here.

[0028] Furthermore, the gear assembly includes a driving gear 30, a driven gear 31, and an idler gear 32 installed inside the third chamber 13. The driving gear 30 is fixedly sleeved on the smooth section of the threaded shaft 26, and the driven gear 31 is fixedly sleeved on the rotating rod 27. The driving gear 30 and the adjacent driven gear 31 are meshed and driven through the idler gear 32. The driven gear at the far end is meshed with the adjacent driven gear through the second idler gear. When the motor 17 drives the threaded shaft 26 to rotate, the gear assembly drives multiple rotating rods 27 and jet pipes 28 to rotate inside the corresponding filter cartridges 20. In conjunction with the electromagnetic pulse valve, intermittent airflow is input to achieve all-round jet cleaning of the filter cartridges 20.

[0029] Furthermore, the dust collection mechanism includes a lifting frame 36 and guide rods 35. Multiple guide rods 35 are fixedly installed near the side wall within the first chamber 11, and the edge of the lifting frame 36 is slidably fitted onto the guide rods 35. Multiple clearance rings 37 are fixedly installed inside the lifting frame 36, and the clearance rings 37 are spaced and fitted around the outer periphery of the filter cartridge 20. A guide plate 38 is fixedly installed in the middle of the lifting frame 36, and a threaded hole is provided on the guide plate 38. The threaded section of the threaded shaft 26 is screwed into the threaded hole of the guide plate 38. A filter plate is installed inside the lifting frame 36, and a shaking component is installed at the bottom end of the threaded shaft 26. When the motor 17 drives the threaded shaft 26 to rotate, the threaded shaft 26 causes the lifting frame 36 to move downward along the guide rod 35. During the downward movement of the lifting frame 36, the filter plate on the lifting frame 36 collects the dust scattered inside the first chamber 11 and moves to the bottom of the first chamber 11, where it is shaken off into the dust collection hopper 14 by the shaking component. More importantly, after the dust removal mechanism sprays away the dust or impurities accumulated on the filter cartridge 20, it works in conjunction with the lifting frame 36 to move down, promptly capturing the scattered dust or impurities and shaking them into the dust collection hopper 14, thus avoiding secondary pollution from the dust.

[0030] Furthermore, the vibration assembly includes a guide block 25 and a curved disk 43. The guide block 25 is fixed between several trays 21 by welding. The smooth end of the bottom of the threaded shaft 26 rotates through the guide block 25. The curved disk 43 is fixed at the bottom end of the threaded shaft 26. The top outer periphery of the curved disk 43 has multiple arc-shaped plates 44 arranged in an array, forming an interlocking annular slope. Several telescopic rods 46 slide through the edge of the guide block 25. The bottom end of the telescopic rod 46 abuts against the arc-shaped plate 44, and a certain distance from the bottom end of the telescopic rod 46... The outer periphery extends to form a wing plate 45. A second return spring is slidably sleeved on the telescopic rod 46. The two ends of the second return spring abut against the bottom ends of the wing plate 45 and the guide block 25, respectively. A contact rod 47 is provided at the top end of the telescopic rod 46. The contact rod 47 is connected to the telescopic rod 46 by a buffer spring. The bottom end of the threaded section of the threaded shaft 26 is on the same plane as the contact rod 47 when it rises to the highest point. A first return spring 42 is sleeved at the bottom of several guide rods 35. The highest point of the first return spring 42 in the non-forced state is on the same plane as the bottom end of the threaded section of the threaded shaft 26. When motor 17 starts, it drives threaded shaft 26 to rotate via gear assembly. The threaded section of threaded shaft 26 drives lifting frame 36 to move downward along guide rod 35. When lifting frame 36 moves to the bottom end of threaded section of threaded shaft 26, lifting frame 36 stops moving downward. At this time, lifting frame 36 is supported upward by first return springs 42 sleeved at the bottom of several guide rods 35, so that the threaded hole on bottom guide plate 38 of lifting frame 36 keeps in contact with the bottom end of threaded section of threaded shaft 26 but no longer generates downward driving force. Lifting frame 36 remains in this position. At the same time, curved disk 43 fixed to the bottom end of threaded shaft 26 continues to rotate with threaded shaft 26. The multiple arc plates 44 arranged in an array on the outer periphery of the top of curved disk 43 form an interlocking annular slope that meets the bottom end of telescopic rod 46. With continuous contact, when the protruding part of the arc plate 44 rotates to the bottom of the telescopic rod 46, the telescopic rod 46 is pushed upward and compresses the second return spring. When the concave part of the arc plate 44 rotates to the bottom of the telescopic rod 46, the telescopic rod 46 quickly falls and resets under the action of the second return spring, thereby causing the contact rod 47 at the top of the telescopic rod 46 to reciprocate up and down. Since the lifting frame 36 has now descended to the same height as the contact rod 47, the contact rod 47 repeatedly strikes the bottom guide plate 38 of the lifting frame 36 during the up and down reciprocating motion, generating continuous mechanical vibration and transmitting it to the filter plate on the lifting frame 36. This vibration causes the captured dust attached to the filter plate to overcome the adhesion and fall off quickly. The fallen dust falls into the ash hopper 14 below under the action of gravity and is collected. The vibration component converts the rotational motion of the threaded shaft 26 into the reciprocating impact motion of the telescopic rod 46, thereby achieving vibration cleaning of the filter plate. This effectively prevents dust accumulation on the filter plate from causing a decrease in dust collection efficiency and ensures the continuous and effective operation of the dust collection mechanism.

[0031] More importantly, since the threaded hole on the bottom guide plate 38 of the lifting frame 36 is in contact with the bottom end of the threaded section of the threaded shaft 26 but no longer generates a downward driving force, the lifting frame 36 remains in this position. When it is necessary to raise the lifting frame 36, the motor 17 can rotate in the opposite direction to drive the lifting frame 36 to move upward along the threaded shaft 26 to restore the initial position. During the collision with the guide plate 38, the contact rod 47 is provided with a reverse movement stroke through the compression of the buffer spring.

[0032] Furthermore, several of the avoidance rings 37 and guide plates 38 form a linearly arranged and spaced array of fixed bodies. The fixed bodies are connected to the lifting frame 36 by welding, and the guide plates 38 are located in the middle of the fixed bodies. Filter plates are arranged between the linearly arranged fixed bodies. Rotating shafts 41 are fixed at both ends of the filter plates. The rotating shafts 41 rotate through the side wall of the lifting frame 36, and the end of the rotating shafts 41 extends into the side plate 48 of the first chamber 11. A flipping assembly is arranged inside the side plate 48. The filter plate includes a first filter plate 40 and a second filter plate 39. Since the filter plate needs to rotate, a normal gap is maintained between the filter plate and the adjacent fixed body to facilitate smooth rotation.

[0033] Furthermore, The flipping assembly includes a guide rod 49 and several guide grooves 54 vertically opened along the side plate 48. The rotating shaft 41 on each filter plate extends into the guide groove 54. A torsion spring 57 is provided between the rotating shaft 41 and the lifting frame 36. A sleeve 56 is slidably provided on the rotating shaft 41. The keyway provided on the inner wall of the sleeve 56 is slidably engaged with the spline 55 on the outer peripheral surface of the rotating shaft 41. The guide rod 49 is fixed on the outer periphery of the sleeve 56. A first traction groove 50 and a second traction groove 51 are opened in parallel on one side wall inside the guide groove 54. The second traction groove 51 is deeper than the first traction groove 50. The bottom end of the second traction groove 51 is connected to the first traction groove 50 through a first transition traction groove 52, and the top end of the second traction groove 51 is connected to the first traction groove 50 through a second transition traction groove 53. Under the action of the torsion spring 57, the guide rod 49 slides against the traction groove. When the guide rod 49 passes through traction grooves of different depths, it rotates, causing the filter plate to rotate at a certain angle, realizing the switching between horizontal closure and inclined opening of the filter plate. Under the action of the torsion spring 57, the end of the guide rod 49 slides against the traction groove. When the guide rod 49 slides in the first traction groove 50, the filter plate is in a horizontal state, which is conducive to capturing dust as the filter plate moves toward the dust collection hopper 14. When the guide rod 49 enters the second traction groove 51 from the bottom of the first traction groove 50, the guide rod 49 rotates under the action of the torsion spring 57 because the second traction groove 51 is deeper. This causes the filter plate to rotate at a certain angle to form an opening, which is conducive to opening a channel for the dust in the first chamber 11 to descend into the dust collection hopper 14 as the filter plate rises away from the dust collection hopper 14 with the lifting frame 36.

[0034] Furthermore, the length of the second traction groove 51 is less than that of the first traction groove 50, and both ends of the second traction groove 51 are located inside the end of the first traction groove 50 and maintain a distance from each other. The connection between the first transition traction groove 52 and the second transition traction groove 53 and the second traction groove 51 is smoothly transitioned and connected. The connection between the first transition traction groove 52 and the first traction groove 50 is lower than the lowest point of the first traction groove 50, and the connection between the second transition traction groove 53 and the first traction groove 50 is higher than the lowest point of the first traction groove 50. Since the connection point between the first transition traction groove 52 and the first traction groove 50 is lower than the lowest point of the first traction groove 50, when the guide rod 49 moves upward from the bottom of the first traction groove 50, the guide rod 49 enters the first transition traction groove 52 and then merges into the second traction groove 51, completing the flipping of the filter plate, and the filter plate changes from a horizontal closed state to an open state; when the guide rod 49 moves downward from the top of the first traction groove 50, the guide rod 49 will briefly fall into the first transition traction groove 52 and then quickly rise back into the first traction groove 50, maintaining its initial direction of movement; it should be emphasized that when the guide rod 49 suddenly falls into the first transition traction groove 52, it will cause the downward-moving filter plate to suddenly turn and return to a horizontal state, which significantly enhances the dust removal from the filter plate and improves the dust unloading capacity. Because the connection point between the second transition traction groove 53 and the first traction groove 50 is higher than the lowest point of the first traction groove 50, the guide rod 49 avoids deviation from the path and maintains the moving direction of the first traction groove 50 as it moves downward from the top. It should be noted that when the guide rod 49 moves in the transition traction groove, it achieves axial sliding through the keyway fit between the sleeve 56 and the rotating shaft 41, and ensures synchronous rotation. The end of the rotating shaft 41 slides inside the guide groove 54 and also has the functions of rotation and limiting, so as to prevent it from falling out of the guide groove 54. The sleeve 56 is widened to open a receiving groove, which facilitates its smooth movement, including axial movement along the rotating shaft 41, movement along the length direction of the guide groove 54, and rotation.

[0035] A method for dust removal using a series-connected filtration unit for high-temperature flue gas includes the following steps: S1. Flue gas enters the first chamber 11 through the inlet pipe 15. The dust in the flue gas is initially intercepted on the outer wall of the filter cartridge 20. The purified airflow passes through the inside of the filter cartridge 20 and enters the second chamber 12 through the through-hole 34, and then is discharged to the next process through the outlet pipe 16. S2. When the dust accumulation on the surface of the filter cartridge 20 reaches the set value, the motor 17 and the electromagnetic pulse valve are started. The motor 17 drives the rotating rod 27 to rotate through the driving gear 30, the driven gear 31 and the idler gear 32, which drives the jet pipe 28 to spray pulse airflow onto the inner wall of the filter cartridge 20 for back-blowing and dust removal, so that the dust accumulation on the surface of the filter cartridge 20 is peeled off and falls downward in the first chamber 11. S3, the motor 17 synchronously drives the threaded shaft 26 to rotate, and through the threaded engagement, the lifting frame 36 drives the filter plate to move in a horizontal closed state. During the downward movement, it captures the scattered dust that is peeled off from the filter cartridge 20 over a large area and transports the dust to the vicinity of the dust collection hopper 14. S4. During the process of the lifting frame 36 descending to the bottom position, the curved disk 43 at the bottom of the threaded shaft 26 continuously triggers the telescopic rod 46 to generate high-frequency micro-vibration. The vibration force is transmitted to the guide plate 38 and filter plate through the contact rod 47, which applies a continuous shaking action to the collected dust, causing the dust to quickly detach and fall into the dust collection hopper 14. S5. After the ash is unloaded, the motor 17 rotates in the opposite direction to drive the threaded shaft 26 to rotate in the opposite direction. The lifting frame 36 drives the dust collection mechanism to reset upward. During the upward movement, the guide rod 49 is guided by the first traction groove 50, the second traction groove 51 and the transition traction grooves 52 and 53 in the side plate 48. It automatically drives the filter plate to rotate around the rotating shaft 41 to the open shape, providing a vertical channel for the dust that is continuously scattered in the first chamber 11, so that it can directly pass through the open filter plate and fall into the ash hopper 14. S6. After the lifting frame 36 is reset to its initial position, the first filter plate 40 returns to its horizontal closed state under the guidance of the guide rod 49, and the system enters the next dust removal cycle to achieve continuous dust removal of flue gas.

[0036] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A series-connected dust collector for high-temperature flue gas, comprising multiple dust collection devices connected in series in a flue gas treatment duct, characterized in that, The dust removal device includes a third chamber (13), a second chamber (12), and a first chamber (11) arranged in a sealed manner from top to bottom. A dust collection hopper (14) is provided at the bottom of the first chamber (11). Several through-holes (34) are opened on the shelf (33) between the second chamber (12) and the first chamber (11). Filter cartridges (20) are installed in the through-holes (34), and the openings of the filter cartridges (20) are connected to the second chamber (12). A smoke inlet (15) is provided on the side wall of the first chamber (11), and a smoke outlet (16) is provided on the side wall of the second chamber (12). A fixing mechanism is provided at the bottom of the first chamber (11), and the filter cartridges (20) are... The bottom seal of the filter cartridge (20) is installed on the fixed mechanism. A dust removal mechanism is set inside the filter cartridge (20). A motor (17) is set at the top of the outside of the third chamber (13). A threaded shaft (26) is set at the output end of the motor (17). The threaded shaft (26) passes through the third chamber (13) and the second chamber (12) and extends into the first chamber (11). The threaded shaft (26) located in the third chamber (13) is driven to each dust removal mechanism through a gear assembly. A dust collection mechanism is screwed onto the threaded shaft (26) located inside the first chamber (11). Under normal working conditions, the dust collection mechanism captures the scattered dust processed by the dust removal mechanism and then shakes it into the dust collection hopper (14). The dust collection mechanism includes a lifting frame (36) and guide rods (35). Multiple guide rods (35) are fixedly installed near the side wall in the first chamber (11). The edge of the lifting frame (36) is slidably sleeved on the guide rods (35). Multiple clearance rings (37) are fixedly installed inside the lifting frame (36). The clearance rings (37) are sleeved on the outer periphery of the filter cartridge (20) with gaps. A guide plate (38) is fixedly installed in the middle of the lifting frame (36). A threaded hole is opened on the guide plate (38). The threaded section of the threaded shaft (26) is screwed into the threaded hole of the guide plate (38). A filter plate is installed inside the lifting frame (36). A shaking component is installed at the bottom end of the threaded shaft (26). Several of the aforementioned avoidance rings (37) and guide plates (38) form a linearly arranged and spaced array of fixed bodies. The fixed bodies are connected to the lifting frame (36) by welding. The guide plates (38) are located in the middle of the fixed bodies. Filter plates are arranged between the linearly arranged fixed bodies. Rotating shafts (41) are fixed at both ends of the filter plates. The rotating shafts (41) rotate through the side wall of the lifting frame (36). The end of the rotating shafts (41) extends into the side plate (48) of the first chamber (11). A flipping assembly is arranged inside the side plate (48). The flipping assembly includes a guide rod (49) and several guide grooves (54) vertically opened along the side plate (48). A rotating shaft (41) on each filter plate extends into the guide groove (54). A torsion spring (57) is installed between the rotating shaft (41) and the lifting frame (36). A sleeve (56) is slidably mounted on the rotating shaft (41). A keyway on the inner wall of the sleeve (56) slides in conjunction with a spline (55) on the outer circumferential surface of the rotating shaft (41). The guide rod (49) is fixed to the outer circumference of the sleeve (56). A first traction groove (50) and a... are parallel to each other on one side wall of the guide groove (54). The second traction groove (51) is deeper than the first traction groove (50). The bottom end of the second traction groove (51) is connected to the first traction groove (50) through the first transition traction groove (52), and the top end of the second traction groove (51) is connected to the first traction groove (50) through the second transition traction groove (53). Under the action of the torsion spring (57), the guide rod (49) slides against the traction groove. When the guide rod (49) passes through traction grooves of different depths, it rotates and drives the filter plate to rotate at a certain angle, thereby realizing the switching between horizontal closure and inclined opening of the filter plate.

2. The series-connected dust collector for high-temperature flue gas according to claim 1, characterized in that, The fixing mechanism includes a frame (24) fixed to the bottom of the first chamber (11), and a plurality of trays (21) are provided inside the frame (24). Adjacent trays (21) are fixedly connected, and the trays (21) and the frame (24) are connected by connecting rods. The trays (21) have grooves (22), and a limiting hole is opened in the middle of the grooves (22). The bottom of the filter cylinder (20) is set as an open structure, and the bottom of the filter cylinder (20) extends outward to form an outer edge. The outer edge of the bottom of the filter cylinder (20) is sealed and fixed in the groove (22) by a pressure ring (23). The outer edge of the top of the filter cylinder (20) is sealed and fixed to the top of the shelf (33).

3. The series-connected dust collector for high-temperature flue gas according to claim 2, characterized in that, The dust removal mechanism includes a hollow rotating rod (27). One end of the rotating rod (27) is installed in the limiting hole of the tray (21) through an angular contact ball bearing (29). The other end of the rotating rod (27) passes through the second chamber (12) and the third chamber (13) and extends to the outside of the top plate of the third chamber (13). The end of the rotating rod (27) is connected to the high-pressure air source through a rotating joint (19). The through-hole of the rotating rod (27) and the third chamber (13) is connected by a rotating bearing (18). An air jet pipe (28) is provided on the outer periphery of the rotating rod (27) located inside the filter cartridge (20). A nozzle is provided on the outer periphery of the air jet pipe (28). The air jet pipe (28) is connected to the hollow rotating rod (27).

4. The series-connected dust collector for high-temperature flue gas according to claim 3, characterized in that, The gear assembly includes a driving gear (30), a driven gear (31), and an idler gear (32) installed inside the third chamber (13). The driving gear (30) is fixedly sleeved on the smooth section of the threaded shaft (26), and the driven gear (31) is fixedly sleeved on the rotating rod (27). The driving gear (30) and the adjacent driven gear (31) are meshed and driven through the idler gear (32). The driven gear at the far end is meshed with the adjacent driven gear through the second idler gear.

5. The series-connected dust collector for high-temperature flue gas according to claim 4, characterized in that, The vibration assembly includes a guide block (25) and a curved disk (43). The guide block (25) is fixed between several trays (21) by welding. The smooth end of the bottom of the threaded shaft (26) rotates through the guide block (25). The curved disk (43) is fixed at the bottom of the threaded shaft (26). The top outer periphery of the curved disk (43) has multiple arc-shaped plates (44) arranged in an array. The multiple arc-shaped plates (44) form an interlocking annular slope. Several telescopic rods (46) slide through the edge of the guide block (25). The bottom end of the telescopic rod (46) abuts against the arc-shaped plate (44). At a certain distance from the bottom end of the telescopic rod (46), the vibration propels the guide block (25) to rotate towards the curved disk (44). The outer periphery extends to form a wing plate (45), and a second return spring is slidably sleeved on the telescopic rod (46). The two ends of the second return spring abut against the bottom ends of the wing plate (45) and the guide block (25) respectively. A contact rod (47) is set at the top end of the telescopic rod (46), and the contact rod (47) is connected to the telescopic rod (46) by a buffer spring. The bottom end of the threaded section of the threaded shaft (26) is on the same plane as the contact rod (47) when it rises to the highest point. A first return spring (42) is sleeved at the bottom of several guide rods (35). The highest point of the first return spring (42) in the non-forced state is on the same plane as the bottom end of the threaded section of the threaded shaft (26).

6. The series-connected dust collector for high-temperature flue gas according to claim 5, characterized in that, The length of the second traction groove (51) is less than that of the first traction groove (50). Both ends of the second traction groove (51) are located inside the end of the first traction groove (50) and maintain a distance. The connection between the first transition traction groove (52) and the second transition traction groove (53) and the second traction groove (51) is smoothly connected. The connection between the first transition traction groove (52) and the first traction groove (50) is lower than the lowest point of the first traction groove (50), and the connection between the second transition traction groove (53) and the first traction groove (50) is higher than the lowest point of the first traction groove (50).

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