Dust cleaning device of floor type sintering large flue and dust cleaning method of dust cleaning device

Abstract

The invention provides a floor type large sintering flue ash removal device, a rail assembly, a traveling assembly and an ash scraping assembly are arranged in a large flue, the rail assembly comprises two rail sets arranged on the two side walls in the large flue, the traveling assembly comprises two sets of driving mechanisms and a movable frame, and the movable frame is arranged on the two rail sets. The ash scraping assembly comprises a moving plate, a toothed plate, a first scraping plate, a second scraping plate, a transmission mechanism, a rocker arm and a supporting plate. The track assembly provides a track for the advancing assembly to move in the large flue, the advancing assembly can move autonomously and drive the ash scraping assembly to move in the smoke flowing direction and conduct ash scraping operation at the same time, and the design effectively solves the problem that in the prior art, ash is prone to being accumulated in a floor type large flue. While the ash removal effect is ensured, low-power-consumption operation can be achieved by means of the pushing effect of flue gas.

Description

Technical Field

[0001] This invention relates to a ash removal device and method for flues, specifically to a ash removal device and method for a floor-mounted sintering flue, belonging to the field of sintering technology. Background Technology

[0002] In the existing sintering machine workshop of the steel plant, the main flue is generally located 7 meters above the ground. The main purpose of this design is to install double-layer ash discharge valves and corresponding leakage channels under the main flue. However, this increases the overall elevation of the workshop and related connecting facilities and equipment, which not only increases the project cost, but also increases the failure points due to the existence of double-layer ash discharge valves, thus increasing the overall air leakage rate of the sintering machine.

[0003] To address the aforementioned issues, existing technology has proposed a patent for "a floor-mounted large flue and sintering machine main plant" (publication number CN113432445A, as shown in the image). Figure 1 (As shown). In this patent, the floor-mounted flue includes a large flue and a dust transfer and collection mechanism located at the bottom of the flue on the dust output side; wherein, the bottom of the large flue is provided with a discharge hole for dust to fall; the dust transfer and collection mechanism is used to transfer and collect the dust discharged from the discharge hole of the large flue, and the dust transfer and collection mechanism includes a sealed shell and a dust conveyor arranged along the extension direction of the large flue, a sealed channel is provided inside the sealed shell, the dust conveyor is located inside the sealed channel, and at least one end of the sealed shell is provided with a temporary storage box for collecting dust, and the dust discharged from the discharge hole of the large flue is transferred to the temporary storage box for collection by the dust conveyor. The floor-mounted sintering machine system with a large flue disclosed in this technology reduces the installation position of the large flue, reduces the elevation of the sintering machine plant, and reduces the engineering cost of the plant.

[0004] Existing technologies have improved the structure of floor-standing sintering flues after further research. For example, patent CN221724940U discloses a floor-standing flue, such as... Figure 2 As shown, the system includes a main flue and multiple air guide pipes connecting to the main flue. The main flue comprises multiple flue segments arranged sequentially, with expansion joints between adjacent flue segments and adjacent flue segments connected by expansion joint assemblies. The flue segments are made of concrete. Using this disclosed technology for a ground-mounted flue eliminates the need for dedicated support beams and maintenance platforms in the workshop, significantly reducing project costs. It also significantly improves the overall seismic performance, structural stability, and ease of daily maintenance of the workshop. The concrete structure of the flue prevents corrosion and facilitates routine maintenance. Furthermore, the upper surface of the flue can serve as a platform for installing process equipment in metallurgical processes, making the workshop layout more compact and rational.

[0005] While the ground-mounted layout of the main sintering plant's flue offers significant advantages, it also presents several problems that urgently need improvement, the most prominent being ash accumulation within the flue. Compared to traditional flues (see...),... Figure 3 ) and floor-mounted large flue (see Figure 1 It is evident that the traditional method of unloading ash from large flues is to directly discharge it into the ash hopper (such as...). Figure 3 As shown), while the ground-mounted large flue discharges ash to the scraper conveyor (such as...). Figure 4 (As shown). Therefore, the opening size of a single ash discharge port in a ground-mounted flue is much smaller than that of a traditional flue, making it easier for ash to accumulate after the flue is laid on the ground. When the ash accumulation reaches a certain level, the dust may not be able to be discharged to the scraper conveyor normally, thus affecting production. Summary of the Invention

[0006] To address the problem of ash accumulation inside ground-mounted sintering flues, this invention proposes a ash-cleaning device and method for such flues. The invention includes a track assembly, a traveling assembly, and a ash-scraping assembly within the flue. The track assembly comprises two track groups mounted on the side walls of the flue. The traveling assembly includes two drive mechanisms and a movable frame. The ash-scraping assembly includes a moving plate, a toothed plate, a first scraper, a second scraper, a transmission mechanism, a rocker arm, and a support plate. The track assembly provides the traveling assembly with a track for movement within the flue. The traveling assembly can move autonomously, driving the ash-scraping assembly to move in the direction of flue gas flow while simultaneously performing ash-scraping operations. This design effectively solves the problem of ash accumulation inside ground-mounted flues in existing technologies. Furthermore, this invention ensures effective ash removal while achieving low-power operation by utilizing the propulsive force of the flue gas.

[0007] According to a first embodiment of the present invention, a dust removal device for a floor-mounted sintering flue is provided.

[0008] A dust removal device for a floor-mounted sintering flue includes a large flue with dust collection holes and air guide pipes at its bottom and top. The device also includes a track assembly, a traveling assembly, and a dust scraping assembly disposed within the flue. The track assembly comprises two track groups: a lower track and an upper track. The traveling assembly includes two sets of drive mechanisms and a movable frame. The dust scraping assembly includes a moving plate, a toothed plate, a first scraper, a second scraper, a transmission mechanism, a rocker arm, and a support plate. The two track groups are respectively disposed on the side walls of the flue, with the lower track located below the upper track. The two sets of drive mechanisms are respectively disposed between the lower and upper tracks of the two track groups. The movable frame is disposed between the two sets of drive mechanisms and fixedly connected to them. The moving plate is disposed above the bottom plate of the flue and below the movable frame. The toothed plate extends through the moving plate along the length of the flue and is slidably connected to it. The first and second scrapers are respectively disposed on both sides of the moving plate and hinged to it. The transmission mechanism is disposed above the moving plate and fixedly connected to it. The output end of the transmission mechanism is fixedly connected to the front end of the toothed plate. The upper end of the rocker arm is hinged to the movable frame, and the lower end is hinged to the top of the moving plate. The upper end of the support plate is fixedly connected to the movable frame, the lower end of the support plate is located behind the moving plate, and the rear end of the toothed plate abuts against the support plate after penetrating the moving plate.

[0009] Preferably, the scraping assembly further includes two gears respectively installed at hinge positions between the movable plate and the first scraper, and between the movable plate and the second scraper. The two gears pass through the side walls of the movable plate and mesh with the side walls of a toothed plate located within the movable plate. Furthermore, the top and bottom plates on both sides of the movable plate extend outwards, and the two gears are respectively positioned between the extending top and bottom plates, and are rotatably connected to the top and bottom plates via shafts.

[0010] In this invention, two track sets are symmetrically arranged on the two side walls of the main flue along its length, and both the lower and upper tracks of the track sets are parallel to the bottom plate of the main flue. Two drive mechanisms are symmetrically arranged between the lower and upper tracks of the two track sets.

[0011] Preferably, the upper track has a toothed groove on its inner top wall. Preferably, the lower track has multiple ash-filling holes. Preferably, the multiple ash-filling holes are evenly arranged along the length of the lower track.

[0012] In this invention, each drive mechanism includes a wheel frame, a motor, a drive wheel, and at least two rollers. The wheel frame is fixed to one side of the movable frame. The motor and drive wheel are arranged on the upper part of the wheel frame, and the motor, wheel frame, and drive wheel are connected through the motor's output shaft. The outer rim of the drive wheel has teeth that mesh with the grooves of the upper track. At least two rollers are mounted on the bottom of the wheel frame, and the rollers are rotatably connected to the wheel frame via shafts. All rollers are disposed within and in contact with the lower track. Preferably, all rollers are arranged along the length of the lower track.

[0013] Preferably, the exterior of the motor undergoes high-temperature resistant treatment. More preferably, this high-temperature resistant treatment includes installing a heat shield or applying a high-temperature resistant coating to the exterior of the motor.

[0014] Preferably, the rocker arm is hinged to the center of the front end of the movable frame. Preferably, the scraping assembly includes two rocker arms. The transmission mechanism is located above the central axis of the moving plate, and the two rocker arms are respectively hinged to the top positions of the moving plate on both sides of the transmission mechanism.

[0015] Preferably, the support plate is fixedly connected to the middle of the rear end of the movable frame.

[0016] In this invention, the main flue includes an upper vertical section and a lower inclined section. The shapes of the first scraper and the second scraper are matched with the internal shape of the main flue. Preferably, the bottom positions of the movable plate and the support plate are higher than the bottom positions of the first scraper and the second scraper.

[0017] Preferably, the track assembly is disposed on the vertical section sidewall of the main flue. Preferably, each track group in the track assembly further includes a connecting plate. The connecting plate is installed on the vertical section sidewall of the main flue, and the lower and upper tracks of the track group are fixed by the connecting plate.

[0018] Preferably, the traveling assembly also includes a winch fixed to the partition wall at the tail end of the main flue. The output cable of the winch passes through the partition wall at the tail end of the main flue and connects to the middle of the rear end of the movable frame.

[0019] As a preferred option, an inspection door is provided on the rear partition wall of the main flue.

[0020] In this invention, the transmission mechanism is an electro-hydraulic actuator or an electric actuator. Preferably, the transmission mechanism undergoes a high-temperature resistant treatment. Preferably, the high-temperature resistant treatment includes spraying a high-temperature resistant coating onto the exterior of the transmission mechanism or wrapping it with high-temperature resistant fabric.

[0021] In this invention, multiple ash collection holes and multiple air guide pipes are respectively provided at the bottom and top of the main flue. The multiple ash collection holes and multiple air guide pipes are each independently and evenly arranged along the length of the main flue. Preferably, the ash collection holes are inverted frustum shapes.

[0022] According to a second embodiment of the present invention, a method for cleaning ash from a floor-mounted sintering flue is provided.

[0023] A method for cleaning a floor-mounted sintering flue or a method for cleaning a flue using the cleaning device described in the first embodiment, the method comprising the following steps: S1. Before the ash removal device operates, the first and second scrapers are unfolded into a staggered arrangement with their openings facing the flue gas outlet. Then, the transmission mechanism extends the drive toothed plate from the inner cavity of the moving plate, disengaging it from the supporting plate that was originally in contact with it. At this time, the moving plate, under its own weight, moves closer to the supporting plate and sinks. The first and second scrapers sink along with the moving plate and approach the bottom wall of the main flue. Simultaneously, the two sets of drive mechanisms, through the movable frame, drive the moving plate to move along the flue gas flow direction within the main flue. During this movement, the first and second scrapers scrape the accumulated ash in the main flue into the ash collection holes. When the moving plate reaches the front end of the main flue, the ash removal operation is complete.

[0024] S2. The transmission mechanism retracts, causing the toothed plate to retract into the inner cavity of the moving plate. After passing through the moving plate, the rear end of the toothed plate abuts against the support plate. At this time, the moving plate is supported and lifted by the reaction force, and the first and second scrapers float away from the bottom wall of the main flue. At the same time, the two sets of drive mechanisms drive the moving plate to move through the movable frame. Finally, the traveling component and the ash scraping component return to the end position of the main flue, preparing for the next ash scraping operation.

[0025] According to a third embodiment of the present invention, a method for cleaning ash from a floor-mounted sintering flue is provided.

[0026] A method for cleaning a floor-mounted sintering flue or a method for cleaning a flue using the cleaning device described in the first embodiment, the method comprising the following steps: S1. Inside the main flue, the transmission mechanism extends the drive toothed plate out of the inner cavity of the moving plate. The toothed plate meshes with the gear, causing it to rotate and open the first and second scrapers, spreading them out in a staggered arrangement with their openings facing the flue gas outlet. At this time, the toothed plate disengages from the originally opposing support plate, and the moving plate, under its own weight, moves closer to the support plate and sinks. The first and second scrapers sink along with the moving plate and approach the bottom wall of the main flue. Simultaneously, the two sets of drive mechanisms, through the movable frame, move the moving plate along the flue gas flow direction within the main flue. During this movement, the first and second scrapers scrape the accumulated ash in the main flue into the ash collection holes. When the moving plate reaches the front end of the main flue, the ash removal operation is complete.

[0027] S2. The transmission mechanism retracts, causing the toothed plate to retract into the inner cavity of the moving plate. After passing through the moving plate, the rear end of the toothed plate abuts against the support plate. At this time, the moving plate is supported and lifted by the reaction force. The first and second scrapers are driven to rotate to a state parallel to the flue gas flow direction and float away from the bottom wall of the main flue. At the same time, the two sets of drive mechanisms drive the moving plate to move through the movable frame. Finally, the traveling component and the ash scraping component return to the tail end of the main flue, ready for the next ash scraping operation.

[0028] In this invention, in steps S1 and S2, the two sets of drive mechanisms drive the movable plate to move through the movable frame. Specifically, the two motors of the two sets of drive mechanisms rotate simultaneously, and the motors drive the drive wheels to mesh with the upper rail to realize the movement of the drive wheels relative to the upper rail. The movable frame and the movable plate are driven to move through the connection of the wheel frame.

[0029] In this invention, during step S1, when the first and second scrapers sink and approach the bottom wall of the main flue, a gap is left between the first and second scrapers and the bottom wall of the main flue. Preferably, the gap is 1-5 mm, more preferably 2-4 mm.

[0030] Preferably, in step S1, when the resistance of the first and second scrapers in advancing and cleaning is low, the motor can be left off, and the drive wheel can move relative to the upper track by means of the propulsion of the flue gas, thereby driving the movable frame and the moving plate to move along the flue gas flow direction. When the resistance of the first and second scrapers in advancing and cleaning is high, the motor is then turned on, and the drive wheel moves relative to the upper track under the combined action of the flue gas propulsion and the motor drive, thereby driving the movable frame and the moving plate to move along the flue gas flow direction.

[0031] Preferably, in step S2, the motor can be left running, and the movable frame and moving plate can be pulled back to the end position of the main flue by a winch.

[0032] To address the problem of ash accumulation inside existing floor-mounted sintering flues, this invention proposes a ash-cleaning device and method for floor-mounted sintering flues. The invention incorporates a track assembly, a traveling assembly, and an ash-scraping assembly within the flue. The track assembly includes two track groups mounted on the side walls of the flue. The traveling assembly comprises two drive mechanisms and a movable frame. The ash-scraping assembly includes a moving plate, a toothed plate, a first scraper, a second scraper, a transmission mechanism, a rocker arm, and a support plate. The track assembly provides the traveling assembly with a track for movement within the flue. The traveling assembly can move autonomously, simultaneously driving the ash-scraping assembly to move in the direction of flue gas flow and perform ash-scraping operations. This design effectively solves the problem of ash accumulation inside existing floor-mounted flues. Furthermore, this invention ensures effective ash removal while achieving low-power operation by utilizing the propulsive force of the flue gas.

[0033] In this invention, the ash removal device for the floor-mounted flue includes a large flue (which can be a concrete structure). Ash collection holes and air guide pipes are respectively provided at the bottom and top of the flue. The ash collection holes are preferably frustum-shaped to ensure a large ash collection surface at the top, allowing the accumulated ash inside the flue to be discharged (e.g., discharged into a scraper conveyor). Based on the existing floor-mounted flue, this invention adds a track assembly, a traveling assembly, and a ash scraping assembly within the flue. The track assembly includes two track groups mounted on the two side walls of the flue. The traveling assembly is mounted on the two track groups and can move along them within the flue. The ash scraping assembly is installed below the traveling assembly. When the traveling assembly moves towards the front end of the flue, the ash scraping assembly scrapes the ash from the bottom of the flue into the ash collection holes. After ash removal is complete, when the traveling assembly moves towards the rear end of the flue, the ash scraping assembly does not contact the bottom of the flue, reducing frictional resistance.

[0034] It should be noted that the front and rear ends (or rear ends) of the main flue described here are relative concepts defined based on the direction of flue gas flow. Specifically, along the flue gas flow direction, the downstream end (i.e., the end where the flue gas outlet is located) is the front end of the main flue, and the upstream end is the rear end. Correspondingly, with the front and rear ends of the main flue determined, the two sides of the side walls of the main flue are also determined. In this invention, the direction in which the traveling component drives the ash-scraping component to clean the ash is along the flue gas flow direction. Under this premise, the traveling component can utilize the propulsive force of the flue gas itself to achieve low-power operation while completing the ash cleaning process.

[0035] Specifically, in the track assembly, each track group includes a lower track and an upper track, which are respectively set on the side walls inside the main flue. The traveling assembly includes two sets of drive mechanisms and a movable frame. The two sets of drive mechanisms are respectively set between the lower and upper tracks of the two track groups, and the movable frame is set between the two sets of drive mechanisms and fixedly connected to the drive mechanisms. The ash scraping assembly includes a moving plate, a toothed plate, a first scraper, a second scraper, a transmission mechanism, a rocker arm, and a support plate. The moving plate is located below the movable frame and above the bottom plate inside the main flue to ensure that the entire ash scraping assembly does not contact the bottom wall (or bottom plate) of the main flue during periods without ash removal, reducing frictional resistance. The toothed plate extends through the moving plate along the length of the main flue and is slidably connected to the moving plate. The first and second scrapers are respectively set on both sides of the moving plate and hinged to it. The transmission mechanism is located above the moving plate and fixedly connected to it. The output end of the transmission mechanism is fixedly connected to the front end of the toothed plate. The transmission mechanism primarily provides the driving force for the extension and retraction of the toothed plate relative to the moving plate. The specific structure of the transmission mechanism is not limited; for example, it can be an electro-hydraulic actuator or an electric actuator. For instance, when an electro-hydraulic actuator is specifically chosen, it is powered by an external cable (a high-temperature cable, such as a fluoroplastic insulated cable, polytetrafluoroethylene (PTFE) cable, or mineral insulated cable (MI), preferably a mineral insulated cable (MI) suitable for the extreme environment inside the large flue; the cable is supplied through a hole in the partition wall at the tail of the large flue, and the hole is properly sealed). The exterior of the electro-hydraulic actuator (including the telescopic rod) is coated with a high-temperature resistant coating or wrapped with high-temperature resistant fabric to ensure stable operation in high-temperature and acidic environments. The movement of the electro-hydraulic actuator is periodic and its usage frequency is low. The upper end of the rocker arm is hinged to the movable frame of the traveling component, and the lower end is hinged to the top of the moving plate. The rocker arm enables the traveling component to drive the scraping component to move. The upper end of the support plate is fixedly connected to the movable frame, and the lower end of the support plate is located behind the movable plate. The rear end of the toothed plate abuts against the support plate after penetrating the movable plate. It should be noted that the front end of the toothed plate is aligned with the front end of the main flue, while the rear end of the toothed plate and the rear end of the movable plate are aligned with the rear end of the main flue.

[0036] Before actual use, the cleaning device for the aforementioned floor-mounted flue gas duct is first unfolded into a staggered arrangement of the first and second scrapers (the first and second scrapers are arranged one after the other along the length of the flue gas duct, or the lengths of the two scrapers are set to be different, so that they are unfolded into a staggered arrangement), with their openings facing the flue gas outlet direction, so as to facilitate cleaning along the flue gas flow direction. Then, the cleaning begins: the transmission mechanism extends and drives the toothed plate to extend out of the inner cavity of the moving plate. The toothed plate disengages from the support plate that was originally in contact with it. At this time, the moving plate moves closer to the support plate and sinks under its own weight. The first and second scrapers sink with the moving plate and approach the bottom wall of the flue gas duct (the first and second scrapers are in close contact with the bottom wall of the flue gas duct, specifically a gap of 1~5mm, preferably 2~4mm, can be reserved from the bottom wall to avoid direct contact and high frictional resistance). Simultaneously, two sets of drive mechanisms, via a movable frame, move the movable plate along the flue gas flow direction within the main flue. During this movement, the first and second scrapers scrape the accumulated ash in the main flue into the ash collection holes. When the movable plate reaches the front end of the main flue, the ash removal operation is complete. Then, the device returns: the transmission mechanism retracts, causing the toothed plate to retract into the inner cavity of the movable plate. After passing through the movable plate, the rear end of the toothed plate again contacts the support plate. At this point, the movable plate is supported and lifted by the reaction force, and the first and second scrapers float away from the bottom wall of the main flue. Similarly, the two sets of drive mechanisms, via the movable frame, move the movable plate, and finally, the traveling component and the ash removal component return to the rear end of the main flue, preparing for the next ash removal operation.

[0037] As a preferred embodiment, gears are installed at the hinge points of both the first and second scrapers and the moving plate. The two gears pass through the side walls of the moving plate and mesh with the side walls of a toothed plate located within the moving plate. Furthermore, the top and bottom plates on both sides of the moving plate extend outwards, and the two gears are respectively positioned between the extended top and bottom plates, achieving a rotatable connection via shafts. This can be understood as gears with shafts, where the shafts and gears rotate synchronously. This structural design ensures that when the toothed plate slides relative to the moving plate, it can drive the two gears, thereby driving the first and second scrapers to rotate. Therefore, before using the entire dust removal device, it is unnecessary to arrange the first and second scrapers in an alternating pattern. When cleaning begins in the direction of flue gas flow, the first and second scrapers, after the transmission mechanism extends, are driven by the meshing gears of the toothed plates to unfold. The two scrapers unfold alternately, with their openings facing the flue gas outlet, ensuring that as much ash as possible from the bottom of the main flue is scraped into the ash collection holes. Furthermore, the two scrapers rotate and unfold into an alternate shape under the drive of the toothed plates and gears, so they will not easily rotate when encountering resistance from accumulated ash, thus affecting the cleaning effect. Even when facing thick layers of ash, they can still be scraped clean. In addition, the movement of the first and second scrapers is affected by the flue gas velocity, requiring only a small amount of power to operate. After cleaning is complete and they return to the end of the main flue, the transmission mechanism retracts, causing the toothed plates to retract into the inner cavity of the moving plate. The rear end of the toothed plates, after passing through the moving plate, re-engages with the support plate. At this time, the moving plate is supported and lifted by the reaction force. The first and second scrapers are driven to rotate to a state parallel to (or nearly parallel to) the flue gas flow direction as the toothed plates retract and the drive gears retract. Figure 15 As shown, since the return stroke is in the opposite direction to the flue gas flow, and the two scrapers are parallel to the flue gas flow, the forward resistance of the device can be reduced, and the scrapers float up away from the bottom wall of the main flue.

[0038] In this invention, the shapes of the first and second scrapers of the ash-scraping assembly are matched to the internal shape of the main flue. Specifically, the interior of the main flue may be rectangular, trapezoidal, or other specific shapes, and the first and second scrapers are designed accordingly as plate-like structures. For example, when the interior of the main flue is rectangular, the first and second scrapers can be designed as rectangular flat plates, with their length and width customized according to the dimensions of the main flue to ensure complete coverage of the ash accumulation area at the bottom of the main flue during the ash-scraping process. If the interior of the main flue is trapezoidal, the first and second scrapers can be designed as trapezoidal plates, with the length and height of the upper and lower bases matching the dimensions of the trapezoidal cross-section of the main flue to achieve efficient ash-scraping. This shape-matching design allows the ash-scraping assembly to better fit the interior of the main flue, improving the ash-scraping effect and reducing ash residue. Simultaneously, the first and second scrapers are made of wear-resistant and high-temperature-resistant materials to adapt to the harsh working environment inside the main flue and extend the service life of the ash-scraping assembly. In addition, since the first and second scrapers will come close to the bottom wall of the large flue as the moving plate sinks during the ash removal process, in order to avoid the moving plate and the support plate interfering with the ash removal operation, the bottom position of the moving plate and the support plate in this invention is higher than the bottom position of the first and second scrapers.

[0039] To ensure uniform force distribution and smooth ash removal by the traveling component, the present invention symmetrically arranges two track groups of the track assembly on the two side walls of the main flue. Furthermore, the lower and upper tracks of the track groups are arranged parallel to the bottom plate of the main flue, and the two drive mechanisms of the traveling component are symmetrically arranged between the lower and upper tracks of the two track groups.

[0040] In this invention, the traveling assembly includes two symmetrically arranged drive mechanisms and a movable frame. Each drive mechanism includes a wheel frame, a motor, a drive wheel, and at least two rollers. That is, the two drive mechanisms consist of two symmetrically arranged wheel frames, two motors, two drive wheels, and at least four rollers. The two wheel frames are symmetrically fixed to both sides of the movable frame. Each wheel frame has a motor (the motor is externally treated for high temperatures, for example, by installing a heat shield or spraying a high-temperature resistant coating to adapt to the extreme environment inside the large flue) and a drive wheel arranged on its upper part. The motor, wheel frame, and drive wheel are connected via the motor's output shaft. The drive wheel rotates with the motor's output shaft, and the drive wheel is rotatably connected to the wheel frame. The outer rim of the drive wheel has teeth, while the inner top wall of the upper rail in the track assembly has grooves. The teeth of the drive wheel mesh with the grooves of the upper rail, allowing the drive wheel to move relative to the upper rail through the engagement of the teeth and grooves. This engagement also drives the entire movable frame and the dust scraping assembly (because the meshing surface of the upper rail in contact with the drive wheel faces downwards, dust will not accumulate on the upper rail surface, ensuring smooth movement of the drive wheel). At least two rollers are installed at the bottom of each wheel frame, and the rollers are rotatably connected to the wheel frame via shafts. All rollers are located within and in contact with the lower rail. In the two sets of drive mechanisms symmetrically arranged on both sides of the main flue, the reason why each set of drive mechanisms, that is, the movable frame, is equipped with at least two rollers on each side (for example, the number of rollers is 2, 3 or 4... preferably, multiple rollers are arranged along the length of the lower track) is that the movable frame of the traveling component supports the entire ash scraping component, and the traveling component mainly relies on the rollers for support. By symmetrically arranging multiple rollers on both sides, it can be ensured that there is surface contact between the traveling component and the track component. In this way, when the rollers move along the lower track, it can be ensured that the movable frame will not sink or rotate due to gravity, thereby ensuring that the lower ash scraping component can smoothly complete the ash cleaning operation.

[0041] In this invention, the main flue includes an upper vertical section and a lower inclined section. Preferably, the track assembly is installed on the side wall of the vertical section of the main flue to effectively reduce its impact on ash accumulation. Specifically, the track assembly includes two track groups symmetrically arranged on the two side walls of the main flue. Each track group includes a lower track and an upper track arranged parallel to each other along the length of the main flue. The upper track has a toothed groove on its inner top wall, which engages with the teeth of the outer ring of the drive wheel of the traveling component. Multiple ash-collecting holes are evenly arranged along the length of the lower track, penetrating downwards through it. When the roller of the traveling component moves within the lower track, it can push the accumulated ash to the ash-collecting holes and cause it to fall (since the entire transmission force is concentrated on the upper track, after ash accumulates in the main flue, the dust will fall into the lower track, not affecting the transmission between the upper track and the drive wheel; the falling dust will be dislodged as the roller moves). Preferably, the track assembly also includes a connecting plate. The connecting plate is installed on the side wall of the main flue. The lower and upper rails are fixed to the side of the main flue using the connecting plate. The upper and lower rails and the connecting plate form a U-shaped or similar U-shaped structure. The design of the connecting plate makes the connection between the upper and lower rails and the side wall of the main flue more stable, enhancing the overall structural strength of the track assembly and enabling it to better withstand the weight of the traveling and scraping components, as well as various forces generated during operation. Simultaneously, this U-shaped or similar U-shaped structure can also prevent dust from entering the track assembly to a certain extent, reducing the impact of dust on the track assembly's operation and ensuring that the traveling component can move smoothly on the track, thereby ensuring that the entire dust removal device can complete the dust removal operation stably and efficiently. The connecting plate can be made of high-temperature resistant and corrosion-resistant materials compatible with the main flue to adapt to the harsh environment inside the main flue and extend the service life of the track assembly.

[0042] Preferably, in the ash scraping assembly, the rocker arm is hinged to the middle of the front end of the movable frame of the traveling assembly. This connection position and hinge method ensures that when the traveling assembly drives the ash scraping assembly to move, the rocker arm can transmit power more flexibly, making the sinking and floating movements of the moving plate more stable and smooth. During the actual operation of the large flue, factors such as the temperature and flow rate of the flue gas may change. This stable movement helps the ash scraping assembly better adapt to different working conditions and ensures the stability of the ash removal effect. At the same time, when encountering complex local ash accumulation in the large flue, the stable movement also allows the first and second scrapers to more effectively scrape the accumulated ash into the ash discharge hole, avoiding the formation of ash removal dead zones.

[0043] Preferably, the support plate is fixedly connected to the middle of the rear end of the movable frame. Positioning the support plate at the middle of the rear end of the movable frame provides a stable and suitable support point for the toothed plate. When the transmission mechanism retracts, causing the toothed plate to return to the inner cavity of the movable plate, the contact between the rear end of the toothed plate and the support plate can evenly apply a reaction force, allowing the movable plate to be smoothly supported and lifted. This design helps ensure that the first and second scrapers can smoothly float away from the bottom wall of the main flue during the return journey, reducing problems such as scraper tilting or jamming caused by uneven force, and further improving the reliability and stability of the entire dust removal device.

[0044] The present invention also has an inspection door installed on the partition wall at the tail end of the flue. When maintenance is required, the device can be inspected by opening the inspection door. (In production, the sintering machine will also be shut down for maintenance periodically. The ash removal device described in the present invention can be inspected at the same time when the sintering machine is shut down for maintenance.)

[0045] Further preferably, the traveling component of this invention also includes a winch, which is fixed to the rear partition wall of the main flue. The output cable of the winch passes through the rear partition wall of the main flue and connects to the middle of the rear end of the movable frame (the perforation is sealed). Connecting to the middle of the movable frame ensures balanced force distribution, guaranteeing smooth movement of the traveling component under the pull of the winch. When the motor drives the movable frame and the ash scraping component back from the front end of the main flue to the rear end, due to significant resistance (reverse flow of flue gas also generates resistance), the winch can be intervened to provide the return power. After intervention, the winch can pull the entire device back to the rear end of the main flue. Furthermore, the output cable of the winch is equipped with a scale, allowing operators to easily determine the real-time position of the device within the main flue.

[0046] It is worth noting that, according to the thrust formula for wind (i.e., smoke), F = 0.5 × Cd × ρ × A × v 2 (Where Cd is the drag coefficient; ρ is the flue gas density; v is the airflow velocity relative to the object; and A is the projected area of ​​the object). The thrust F per square meter inside the main flue of the device is F = 0.5 × 0.5 × 1.3 × 1 × 20. 2 The resistance is approximately 130 N (Cd drag coefficient is taken as 0.5; ρ is the flue gas density, taken as 1.3 kg / m³). 3(where v is the airflow velocity relative to the object, taken as 20 m / s). It can be seen that when the device of this invention moves along the direction of the flue gas flow, it can basically move under the thrust of the flue gas. Therefore, furthermore, the motor in the traveling component of this invention can also be turned on only when needed to drive the device to move. For example, when the device is working along the direction of the flue gas flow, the motor is not turned on initially. The device moves forward to clean the ash under the propulsion of the flue gas, and the movement of the device in the main flue can be monitored by the scale on the output cable of the winch. If the monitoring finds that the device moves a shorter distance in the main flue within a certain period of time, it indicates that the moving resistance may be too high, and the device moves slowly. At this time, the motor is turned on to drive the device forward. That is, while ensuring the ash cleaning effect, low power consumption operation is achieved.

[0047] In this application, the length of the main flue is 0.5 to 200 m, preferably 1 to 120 m, more preferably 2 to 100 m, and even more preferably 3 to 80 m.

[0048] In this application, the width of the main flue (when the width varies at different locations, i.e., the maximum width) is 0.5~50m, preferably 0.8~30m, more preferably 1~20m, and even more preferably 1.5~10m.

[0049] Compared with the prior art, the present invention has the following beneficial technical effects: 1. This invention incorporates a track assembly, a traveling assembly, and a ash-scraping assembly within a large flue. The track assembly provides a path for the traveling assembly to move within the flue. The traveling assembly can move autonomously, simultaneously driving the ash-scraping assembly to move in the direction of flue gas flow and perform ash-scraping operations. This design effectively solves the problem of easy ash accumulation inside floor-mounted large flues in existing technologies. Moreover, this invention ensures effective ash removal while achieving low-power operation by utilizing the propulsive force of the flue gas.

[0050] 2. In the ash scraping assembly of this invention, a gear and toothed plate meshing transmission is used to enable the first scraper and the second scraper to automatically unfold and retract. That is, the first scraper and the second scraper can unfold into an interlaced shape during the ash cleaning operation to ensure the ash cleaning effect. At the same time, in the return phase after the ash cleaning is completed, they can rotate to a direction parallel to the flue gas flow direction to reduce the operating resistance of the device and further achieve low power consumption operation.

[0051] 3. In this invention, the shapes of the first and second scrapers are matched with the internal shape of the main flue to ensure complete coverage of the ash accumulation area and reduce ash residue. Furthermore, the track assembly, while ensuring stable movement of the traveling components, also prevents ash accumulation from affecting the operation of the device.

[0052] 4. When the device of the present invention moves along the direction of flue gas flow, it can use the thrust of flue gas to start the motor as needed, which reduces energy consumption and improves economy while ensuring the ash removal effect. It has the advantages of high efficiency, reliability and low power consumption, and provides a new solution for ash removal of sintering flue gas. Attached Figure Description

[0053] Figure 1 A schematic diagram of the layout of the main plant building with a ground-mounted large flue in the existing technology; Figure 2 This is a schematic diagram of a floor-mounted large flue structure in the existing technology; Figure 3 A schematic diagram of the ash discharge port of a traditional large flue. Figure 4 A schematic diagram of the ash discharge port of a ground-mounted large flue; Figure 5 This is a schematic diagram of the overall structure of the floor-mounted large flue in this invention; Figure 6 This is a front view of the floor-mounted large flue in this invention; wherein: the arrow indicates the direction of flue gas flow within the large flue; Figure 7 This is a side view of the ash removal device for the floor-standing sintering flue in this invention. Figure 8 for Figure 7 A magnified view of position A in the middle; Figure 9 This is a schematic diagram of the track assembly, travel assembly, and ash scraping assembly inside the large flue in this invention; Figure 10 This is a top view of the main flue in this invention; Figure 11 This is a connection diagram between the track assembly, the traveling assembly, and the scraping assembly in this invention; Figure 12 This is a partial side view of the structure in this invention; Figure 13 This is an exploded view of the track assembly in this invention; Figure 14 This is a structural diagram of the ash scraping component and part of the traveling component in this invention; Figure 15 This is a top view of the slagging component in this invention; Figure 16 This is a partial connection diagram of the scraping component and the traveling component in this invention.

[0054] Figure label: Figure 2 Figure labels in the diagram: 1: Main flue; 1.4: Reinforced concrete layer; 1.5: Thermal insulation layer; 1.6: Wear-resistant layer; 3: Sintering machine gas duct; 4: Process equipment.

[0055] Figure 4 Figure labels in the diagram: 3: Scraper; 21: Floor-standing large flue body; 26: Air guide pipe.

[0056] Figures 5-16 Figure labels in the diagram: 1: Main flue; 101: Vertical section; 102: Inclined section; 2: Ash discharge hole; 3: Air duct; 4: Track assembly; 401: Lower track; 40101: Ash discharge hole; 402: Upper track; 403: Connecting plate; 5: Traveling assembly; 501: Movable frame; 502: Wheel frame; 503: Motor; 504: Drive wheel; 505: Roller; 506: Winch; 6: Ash scraping assembly; 601: Moving plate; 602: Toothed plate; 603: First scraper; 604: Second scraper; 605: Transmission mechanism; 606: Rocker arm; 607: Support plate; 608: Gear; 7: Inspection door. Detailed Implementation

[0057] The technical solution of the present invention will be illustrated below with examples. The scope of protection sought by the present invention includes, but is not limited to, the following embodiments.

[0058] According to a first embodiment of the present invention, a dust removal device for a floor-mounted sintering flue is provided.

[0059] A dust removal device for a floor-mounted sintering flue includes a flue 1, with dust collection holes 2 and air guide pipes 3 at the bottom and top of the flue 1, respectively. The device also includes a track assembly 4, a traveling assembly 5, and a dust scraping assembly 6 disposed within the flue 1. The track assembly 4 comprises two track groups: a lower track 401 and an upper track 402. The traveling assembly 5 includes two sets of drive mechanisms and a movable frame 501. The dust scraping assembly 6 includes a moving plate 601, a toothed plate 602, a first scraper 603, a second scraper 604, a transmission mechanism 605, a rocker arm 606, and a support plate 607. The two track groups are respectively disposed on the side walls of the flue 1, with the lower track 401 located below the upper track 402. The two sets of drive mechanisms are respectively disposed between the lower track 401 and the upper track 402 of the two track groups. The movable frame 501 is disposed between the two sets of drive mechanisms 501 and is fixedly connected to the drive mechanisms 501. The movable plate 601 is positioned above the bottom plate inside the main flue 1 and below the movable frame 501. A toothed plate 602 extends through the movable plate 601 along the length of the main flue 1 and is slidably connected to it. A first scraper 603 and a second scraper 604 are respectively positioned on both sides of the movable plate 601 and hinged to it. A transmission mechanism 605 is positioned above the movable plate 601 and fixedly connected to it. The output end of the transmission mechanism 605 is fixedly connected to the front end of the toothed plate 602. The upper end of the rocker arm 606 is hinged to the movable frame 501, and the lower end is hinged to the top of the movable plate 601. The upper end of the support plate 607 is fixedly connected to the movable frame 501, the lower end of the support plate 607 is located behind the movable plate 601, and the rear end of the toothed plate 602 abuts against the support plate 607 after penetrating the movable plate 601.

[0060] Preferably, the scraping assembly 6 further includes two gears 608 respectively installed at hinge positions between the movable plate 601 and the first scraper 603, and between the movable plate 601 and the second scraper 604. The two gears 608 pass through the side walls of the movable plate 601 and mesh with the side walls of the toothed plate 602 located within the movable plate 601. Furthermore, the top and bottom plates on both sides of the movable plate 601 extend outwards, and the two gears 608 are respectively disposed between the extending top and bottom plates, and are rotatably connected to the top and bottom plates via shafts.

[0061] In this invention, two track sets are symmetrically arranged on the two side walls of the main flue 1 along its length, and the lower track 401 and upper track 402 of the track sets are both parallel to the bottom plate of the main flue 1. Two sets of drive mechanisms 501 are symmetrically arranged between the lower track 401 and the upper track 402 of the two track sets.

[0062] Preferably, the upper track 402 has a toothed groove on its inner top wall. Preferably, the lower track 401 has a plurality of lower ash holes 40101. Preferably, the plurality of lower ash holes 40101 are evenly arranged along the length direction of the lower track 401.

[0063] In this invention, each drive mechanism includes a wheel frame 502, a motor 503, a drive wheel 504, and at least two rollers 505. The wheel frame 502 is fixed to one side of the movable frame 501. The motor 503 and the drive wheel 504 are arranged on the upper part of the wheel frame 502, and the motor 503, wheel frame 502, and drive wheel 504 are connected through the output shaft of the motor 503. The outer circumference of the drive wheel 504 has teeth that mesh with the tooth grooves of the upper track 402. At least two rollers 505 are mounted on the bottom of the wheel frame 502, and the rollers 505 are rotatably connected to the wheel frame 502 via shafts. All rollers 505 are disposed within and in contact with the lower track 401. Preferably, all rollers 505 are arranged along the length of the lower track 401.

[0064] Preferably, the exterior of the motor 503 undergoes high-temperature resistant treatment. Preferably, the high-temperature resistant treatment includes installing a heat insulation cover or spraying a high-temperature resistant coating on the exterior of the motor 503.

[0065] Preferably, the rocker arm 606 is hinged to the middle of the front end of the movable frame 501. Preferably, the ash scraping assembly 6 includes two rocker arms 606. The transmission mechanism 605 is located above the central axis of the moving plate 601, and the two rocker arms 606 are respectively hinged to the top positions of the moving plate 601 on both sides of the transmission mechanism 605.

[0066] Preferably, the support plate 608 is fixedly connected to the middle of the rear end of the movable frame 501.

[0067] In this invention, the main flue 1 includes an upper vertical section 101 and a lower inclined section 102. The shapes of the first scraper 603 and the second scraper 604 are matched with the internal shape of the main flue 1. Preferably, the bottom positions of the movable plate 601 and the support plate 607 are higher than the bottom positions of the first scraper 603 and the second scraper 604.

[0068] Preferably, the track assembly 4 is disposed on the vertical section sidewall of the main flue 1. Preferably, in the track assembly 4, each track group further includes a connecting plate 403. The connecting plate 403 is installed on the vertical section sidewall of the main flue 1, and the lower track 401 and the upper track 402 of the track group are fixed by the connecting plate 403.

[0069] Preferably, the traveling assembly 5 further includes a winch 506 fixed to the rear partition wall of the main flue 1. The output cable of the winch 506 passes through the rear partition wall of the main flue 1 and connects to the middle of the rear end of the movable frame 501.

[0070] As a preferred option, an inspection door 7 is provided on the rear partition wall of the main flue 1.

[0071] In this invention, the transmission mechanism 605 is an electro-hydraulic actuator or an electric actuator. Preferably, the transmission mechanism 605 undergoes high-temperature resistant treatment on its exterior. Preferably, the high-temperature resistant treatment includes spraying a high-temperature resistant coating onto the exterior of the transmission mechanism 605 or wrapping it with high-temperature resistant fabric.

[0072] In this invention, multiple ash collection holes 2 and multiple air guide pipes 3 are respectively provided at the bottom and top of the main flue 1. The multiple ash collection holes 2 and multiple air guide pipes 3 are each independently and evenly arranged along the length of the main flue 1. Preferably, the ash collection holes 2 are inverted frustum shapes. Example 1

[0073] like Figure 5 , 7 As shown in Figures -8, 11-12, and 14-16, a dust removal device for a floor-mounted sintering flue includes a flue 1, with dust collection holes 2 and air guide pipes 3 at the bottom and top of the flue 1, respectively. The device also includes a track assembly 4, a traveling assembly 5, and a dust scraping assembly 6 disposed within the flue 1. The track assembly 4 comprises two track groups: a lower track 401 and an upper track 402. The traveling assembly 5 includes two sets of drive mechanisms and a movable frame 501. The dust scraping assembly 6 includes a moving plate 601, a toothed plate 602, a first scraper 603, a second scraper 604, a transmission mechanism 605, a rocker arm 606, and a support plate 607. The two track groups are respectively disposed on the side walls within the flue 1, with the lower track 401 located below the upper track 402. The two sets of drive mechanisms are respectively disposed between the lower track 401 and the upper track 402 of the two track groups. A movable frame 501 is positioned between two sets of drive mechanisms 501 and is fixedly connected to the drive mechanisms 501. A movable plate 601 is positioned above the inner bottom plate of the main flue 1 and below the movable frame 501. A toothed plate 602 extends through the movable plate 601 along the length of the main flue 1 and is slidably connected to the movable plate 601. A first scraper 603 and a second scraper 604 are respectively positioned on both sides of the movable plate 601 and hinged to it. A transmission mechanism 605 is positioned above the movable plate 601 and is fixedly connected to it. The output end of the transmission mechanism 605 is fixedly connected to the front end of the toothed plate 602. The upper end of the rocker arm 606 is hinged to the movable frame 501, and the lower end is hinged to the top of the movable plate 601. The upper end of the support plate 607 is fixedly connected to the movable frame 501, the lower end of the support plate 607 is located behind the movable plate 601, and the rear end of the toothed plate 602 abuts against the support plate 607 after penetrating the movable plate 601. Example 2

[0074] The embodiment 1 is repeated, except that the scraping assembly 6 further includes two gears 608 respectively installed at hinge positions between the movable plate 601 and the first scraper 603, and between the movable plate 601 and the second scraper 604. The two gears 608 pass through the side walls of the movable plate 601 and mesh with the side walls of the toothed plate 602 located within the movable plate 601. Furthermore, the top and bottom plates on both sides of the movable plate 601 extend outwards, and the two gears 608 are respectively disposed between the extending top and bottom plates on both sides, and are rotatably connected to the top and bottom plates via shafts. Example 3

[0075] The embodiment 2 is repeated, except that the two track groups are symmetrically arranged on the two side walls of the main flue 1 along its length, and the lower track 401 and upper track 402 of the track groups are both arranged parallel to the bottom plate of the main flue 1. Two sets of drive mechanisms 501 are symmetrically arranged between the lower track 401 and upper track 402 of the two track groups. Example 4

[0076] The embodiment 3 is repeated, except that the inner top wall of the upper track 402 is provided with a toothed groove. Example 5

[0077] like Figure 13 As shown, embodiment 4 is repeated, except that the lower track 401 is provided with multiple lower ash holes 40101. Example 6

[0078] Example 5 is repeated, except that the plurality of lower ash holes 40101 are evenly arranged along the length of the lower track 401. Example 7

[0079] The embodiment 6 is repeated, except that each drive mechanism includes a wheel frame 502, a motor 503, a drive wheel 504, and two rollers 505. The wheel frame 502 is fixed to one side of the movable frame 501. The motor 503 and drive wheel 504 are arranged on the upper part of the wheel frame 502, and the motor 503, wheel frame 502, and drive wheel 504 are connected through the output shaft of the motor 503. The outer ring of the drive wheel 504 has teeth that mesh with the tooth grooves of the upper rail 402. Two rollers 505 are installed at the bottom of the wheel frame 502, and the rollers 505 are rotatably connected to the wheel frame 502 through shafts. All rollers 505 are disposed within and in contact with the lower rail 401. Example 8

[0080] Example 7 is repeated, except that the two rollers 505 are arranged along the length of the lower track 401. Example 9

[0081] Example 8 is repeated, except that the exterior of the motor 503 undergoes high-temperature resistant treatment. This high-temperature resistant treatment involves installing a heat shield on the exterior of the motor 503. Example 10

[0082] Example 8 is repeated, except that the exterior of the motor 503 undergoes a high-temperature resistant treatment. This high-temperature resistant treatment involves spraying a high-temperature resistant coating onto the exterior of the motor 503. Example 11

[0083] The same embodiment 9 is repeated, except that the rocker arm 606 is hinged to the middle of the front end of the movable frame 501. Example 12

[0084] The embodiment 11 is repeated, except that the scraping assembly 6 includes two rocker arms 606. The transmission mechanism 605 is located above the central axis of the moving plate 601, and the two rocker arms 606 are respectively hinged to the top positions of the moving plate 601 on both sides of the transmission mechanism 605. Example 13

[0085] The embodiment 12 is repeated, except that the support plate 608 is fixedly connected to the middle of the rear end of the movable frame 501. Example 14

[0086] The embodiment 13 is repeated, except that the main flue 1 includes an upper vertical section 101 and a lower inclined section 102. The shapes of the first scraper 603 and the second scraper 604 are matched with the internal shape of the main flue 1. Example 15

[0087] Example 14 is repeated, except that the bottom positions of the moving plate 601 and the support plate 607 are higher than the bottom positions of the first scraper 603 and the second scraper 604. Example 16

[0088] Repeat Example 15, except that the track assembly 4 is installed on the vertical section sidewall of the main flue 1. Example 17

[0089] The embodiment 16 is repeated, except that in the track assembly 4, each track group also includes a connecting plate 403. The connecting plate 403 is installed on the vertical section side wall of the main flue 1, and the lower track 401 and the upper track 402 of the track group are fixed by the connecting plate 403. Example 18

[0090] The embodiment 17 is repeated, except that the traveling component 5 further includes a winch 506 fixed to the rear partition wall of the main flue 1. The output cable of the winch 506 passes through the rear partition wall of the main flue 1 and connects to the middle of the rear end of the movable frame 501. Example 19

[0091] The same as embodiment 18 is repeated, except that an inspection door 7 is provided on the rear partition wall of the main flue 1. Example 20

[0092] Example 19 is repeated, except that the transmission mechanism 605 is an electro-hydraulic actuator. Example 21

[0093] Example 19 is repeated, except that the transmission mechanism 605 is an electric push rod. Example 22

[0094] Example 21 is repeated, except that the electric actuator is subjected to high-temperature resistant treatment on its exterior. The high-temperature resistant treatment is performed by wrapping the exterior of the electric actuator with high-temperature resistant fabric. Example 23

[0095] Example 20 is repeated, except that the electro-hydraulic actuator undergoes a high-temperature resistant treatment on its exterior. This high-temperature resistant treatment involves spraying a high-temperature resistant coating onto the exterior of the electro-hydraulic actuator. Example 24

[0096] like Figure 6 , 9 As shown, embodiment 23 is repeated, except that multiple ash collection holes 2 and multiple air guide pipes 3 are respectively provided at the bottom and top of the main flue 1. The multiple ash collection holes 2 and the multiple air guide pipes 3 are each independently and evenly arranged along the length of the main flue 1. Example 25

[0097] like Figure 10 As shown, embodiment 24 is repeated, except that the dust collection hole 2 is an inverted frustum shape. Example 26

[0098] A method for cleaning a floor-mounted sintering flue, using the cleaning device described in Example 1, includes the following steps: S1. Before the ash removal device operates, the first scraper 603 and the second scraper 604 are unfolded into an alternating arrangement with their openings facing the flue gas outlet. Then, the transmission mechanism 605 extends the drive toothed plate 602 out of the inner cavity of the moving plate 601. The toothed plate 602 disengages from the originally opposing support plate 607. At this time, the moving plate 601, under its own weight, moves closer to the support plate 607 and sinks. The first scraper 603 and the second scraper 604 sink along with the moving plate 601 and approach the bottom wall of the main flue 1. Simultaneously, the two sets of drive mechanisms, through the movable frame 501, drive the moving plate 601 to move along the flue gas flow direction within the main flue 1. During this movement, the first scraper 603 and the second scraper 604 scrape the accumulated ash in the main flue 1 into the ash collection hole 2. When the moving plate 601 moves to the front end position of the main flue 1, the ash removal operation is completed.

[0099] S2. The retraction of the transmission mechanism 605 causes the toothed plate 602 to retract into the inner cavity of the moving plate 601. After passing through the moving plate 601, the rear end of the toothed plate 602 abuts against the support plate 607. At this time, the moving plate 601 is supported and lifted by the reaction force, and the first scraper 603 and the second scraper 604 float away from the bottom wall of the main flue 1. At the same time, the two sets of drive mechanisms drive the moving plate 601 to move through the movable frame 501. Finally, the traveling component 5 and the ash-scraping component 6 return to the tail end of the main flue 1, ready for the next ash-scraping operation. Example 27

[0100] A method for cleaning a floor-mounted sintering flue, using the cleaning device described in Example 2, includes the following steps: S1. Inside the main flue 1, the transmission mechanism 605 extends to drive the toothed plate 602 out of the inner cavity of the moving plate 601. The toothed plate 602 meshes with the gear 608, causing it to rotate and open the first scraper 603 and the second scraper 604, making them staggered and with their openings facing the flue gas outlet. At this time, the toothed plate 602 disengages from the originally opposing support plate 607, and the moving plate 601 then moves closer to the support plate 607 and sinks under its own weight. The first scraper 603 and the second scraper 604 sink with the moving plate 601 and approach the bottom wall of the main flue 1. Simultaneously, the two sets of drive mechanisms drive the moving plate 601 to move along the flue gas flow direction inside the main flue 1 via the movable frame 501. During the movement, the first scraper 603 and the second scraper 604 scrape the accumulated ash in the main flue 1 into the ash collection hole 2. When the moving plate 601 moves to the front end position of the main flue 1, the ash cleaning operation is completed.

[0101] S2. The retraction of the transmission mechanism 605 causes the toothed plate 602 to retract into the inner cavity of the moving plate 601. After passing through the moving plate 601, the rear end of the toothed plate 602 abuts against the support plate 607. At this time, the moving plate 601 is supported and lifted by the reaction force. The first scraper 603 and the second scraper 604 are driven to rotate to a state parallel to the flue gas flow direction and float away from the bottom wall of the main flue 1. At the same time, the two sets of drive mechanisms drive the moving plate 601 to move through the movable frame 501. Finally, the traveling component 5 and the ash scraping component 6 return to the tail end of the main flue 1, ready for the next ash scraping operation. Example 28

[0102] A method for cleaning a floor-mounted sintering flue, using the cleaning device described in Example 25, includes the following steps: S1. Inside the main flue 1, the electro-hydraulic actuator extends, driving the toothed plate 602 to extend from the inner cavity of the moving plate 601. The toothed plate 602 meshes with the gear 608, causing it to rotate and opening the first scraper 603 and the second scraper 604, which are then arranged in an alternating pattern with their openings facing the flue gas outlet. At this time, the toothed plate 602 disengages from the originally opposing support plate 607, and the moving plate 601, under its own weight, moves closer to the support plate 607 and sinks. The first scraper 603 and the second scraper 604 sink along with the moving plate 601 and approach the bottom wall of the main flue 1. Simultaneously, the two motors 503 of the two sets of drive mechanisms rotate at the same time. The motors 503 drive the drive wheel 504 to mesh with the upper rail 402, enabling the drive wheel 504 to move relative to the upper rail 402. Through the connection of the wheel frame 502, the movable frame 501 and the moving plate 601 move along the flue gas flow direction within the main flue 1. During the movement, the first scraper 603 and the second scraper 604 scrape the accumulated ash in the main flue 1 into the ash discharge hole 2. When the moving plate 601 moves to the front end of the main flue 1, the ash removal operation is completed.

[0103] S2. The electro-hydraulic actuator retracts, causing the toothed plate 602 to retract into the inner cavity of the moving plate 601. After passing through the moving plate 601, the rear end of the toothed plate 602 abuts against the support plate 607. At this time, the moving plate 601 is supported and lifted by the reaction force. The first scraper 603 and the second scraper 604 are driven to rotate to a state parallel to the flue gas flow direction and float away from the bottom wall of the main flue 1. At the same time, the two motors 503 of the two sets of drive mechanisms rotate in opposite directions. The motors 503 drive the drive wheels 504 to engage with the upper rail 402, so that the drive wheels 504 move relative to the upper rail 402. Through the connection of the wheel frame 502, the movable frame 501 and the moving plate 601 move in the opposite direction of the flue gas flow direction. Finally, the traveling component 5 and the ash scraping component 6 return to the tail end of the main flue 1, ready for the next ash scraping operation. Example 29

[0104] Example 28 is repeated, except that in step S1, when the first scraper 603 and the second scraper 604 sink and approach the bottom wall of the main flue 1, a gap is left between the first scraper 603 and the second scraper 604 and the bottom wall of the main flue 1. The gap is 2mm. Example 30

[0105] Example 28 is repeated, except that in step S1, when the first scraper 603 and the second scraper 604 sink down and approach the bottom wall of the main flue 1, a gap is left between the first scraper 603 and the second scraper 604 and the bottom wall of the main flue 1. The gap is 4mm. Example 31

[0106] Example 28 is repeated, except that in step S1, when the first scraper 603 and the second scraper 604 sink and approach the bottom wall of the main flue 1, a gap is left between the first scraper 603 and the second scraper 604 and the bottom wall of the main flue 1. The gap is 3mm. Example 32

[0107] Repeat Embodiment 31, except that in step S1, when the resistance of the first scraper 603 and the second scraper 604 in advancing and cleaning is small, the motor 503 can be left off. The drive wheel 504 moves relative to the upper track 402 by the propulsion of the flue gas, thereby driving the movable frame 501 and the moving plate 601 to move along the flue gas flow direction. Simultaneously, the movement of the moving plate 601 within the main flue 1 is monitored using a scale on the output cable of the winch 506. If it is found that the moving distance of the moving plate 601 within the main flue 601 is too small within a certain period, it indicates that the moving resistance is too large and the device moves slowly. In this case, the motor 503 is then turned on, and the movable frame 501 and the moving plate 601 move forward under the combined action of the flue gas propulsion and the motor 503 drive. Example 33

[0108] Repeat embodiment 31, except that in step S2, the motor 503 may not be turned on, and the driving force may be provided by the winch 506 to pull the movable frame 501 and the movable plate 601 back to the tail end position of the main flue 1.

Claims

1. A dust removal device for a floor-mounted sintering flue, comprising a flue (1), wherein dust collection holes (2) and air guide pipes (3) are respectively provided at the bottom and top of the flue (1); characterized in that: The device also includes a track assembly (4), a traveling assembly (5), and a scraping assembly (6) disposed within the main flue (1); wherein, the track assembly (4) includes two track groups, the track groups including a lower track (401) and an upper track (402); the traveling assembly (5) includes two sets of drive mechanisms and a movable frame (501); the scraping assembly (6) includes a moving plate (601), a toothed plate (602), a first scraper (603), a second scraper (604), a transmission mechanism (605), a rocker arm (606), and a support plate (607); the two track groups are respectively disposed on the two side walls within the main flue (1), and the lower track (401) is located below the upper track (402); the two sets of drive mechanisms are respectively disposed between the lower track (401) and the upper track (402) of the two track groups; the movable frame (501) is disposed between the two sets of drive mechanisms (501) and is fixedly connected to the drive mechanisms (501); the moving plate (601) The toothed plate (602) is positioned above the bottom plate of the main flue (1) and below the movable frame (501); the toothed plate (602) extends through the movable plate (601) along the length of the main flue (1) and is slidably connected to the movable plate (601); the first scraper (603) and the second scraper (604) are respectively positioned on both sides of the movable plate (601) and are hinged to the movable plate (601); the transmission mechanism (605) is positioned above the movable plate (601) and is hinged to the movable plate (601). 1) Fixed connection; the output end of the transmission mechanism (605) is fixedly connected to the front end of the toothed plate (602); the upper end of the rocker arm (606) is hinged to the movable frame (501), and the lower end is hinged to the top of the moving plate (601); the upper end of the support plate (607) is fixedly connected to the movable frame (501), the lower end of the support plate (607) is located behind the moving plate (601), and the rear end of the toothed plate (602) abuts against the support plate (607) after penetrating the moving plate (601).

2. The dust removal device according to claim 1, characterized in that: The scraping assembly (6) further includes two gears (608) respectively installed at the hinge positions between the movable plate (601) and the first scraper (603) and between the movable plate (601) and the second scraper (604); the two gears (608) respectively pass through the two side walls of the movable plate (601) and mesh with the two side walls of the toothed plate (602) located in the movable plate (601); moreover, the top plate and bottom plate on both sides of the movable plate (601) extend outward, and the two gears (608) are respectively arranged between the top plate and bottom plate extending on both sides, and are rotatably connected to the top plate and bottom plate through shafts.

3. The dust removal device according to claim 1 or 2, characterized in that: Two track sets are symmetrically arranged on the two side walls of the main flue (1) along its length, and the lower track (401) and upper track (402) of the track sets are both parallel to the bottom plate of the main flue (1); two sets of drive mechanisms (501) are symmetrically arranged between the lower track (401) and upper track (402) of the two track sets; and / or The upper track (402) has a toothed groove on its inner top wall; preferably, the lower track (401) has a plurality of lower ash holes (40101); preferably, the plurality of lower ash holes (40101) are evenly arranged along the length direction of the lower track (401).

4. The dust removal device according to claim 3, characterized in that: Each drive mechanism includes a wheel frame (502), a motor (503), a drive wheel (504), and at least two rollers (505); wherein, the wheel frame (502) is fixed to one side of the movable frame (501); the upper part of the wheel frame (502) is provided with a motor (503) and a drive wheel (504), and the motor (503), wheel frame (502), and drive wheel (504) are connected through the output shaft of the motor (503); the outer ring of the drive wheel (504) is provided with teeth, which mesh with the tooth groove of the upper rail (402); at least two rollers (505) are installed at the bottom of the wheel frame (502), and the rollers (505) are rotatably connected to the wheel frame (502) through shafts; all rollers (505) are arranged in the lower rail (401) and in contact with the lower rail (401); preferably, all rollers (505) are arranged along the length direction of the lower rail (401); Preferably, the motor (503) is subjected to high-temperature resistant treatment on its exterior; preferably, the high-temperature resistant treatment includes setting a heat insulation cover or spraying a high-temperature resistant coating on the exterior of the motor (503).

5. The dust removal device according to any one of claims 1-4, characterized in that: The rocker arm (606) is hinged to the middle of the front end of the movable frame (501); preferably, the scraping assembly (6) includes two rocker arms (606); the transmission mechanism (605) is located above the central axis of the moving plate (601), and the two rocker arms (606) are respectively hinged to the top positions of the moving plate (601) on both sides of the transmission mechanism (605); and / or The support plate (608) is fixedly connected to the middle of the rear end of the movable frame (501).

6. The dust removal device according to any one of claims 1-5, characterized in that: The main flue (1) includes an upper vertical section (101) and a lower inclined section (102); the shapes of the first scraper (603) and the second scraper (604) are matched with the internal shape of the main flue (1); preferably, the bottom positions of the moving plate (601) and the support plate (607) are higher than the bottom positions of the first scraper (603) and the second scraper (604); Preferably, the track assembly (4) is disposed on the vertical section sidewall of the main flue (1); preferably, in the track assembly (4), each track group further includes a connecting plate (403); the connecting plate (403) is installed on the vertical section sidewall of the main flue (1) and the lower track (401) and upper track (402) of the track group are fixed by the connecting plate (403).

7. The dust removal device according to any one of claims 1-6, characterized in that: The traveling assembly (5) further includes a winch (506) fixed to the rear partition wall of the main flue (1); the output cable of the winch (506) passes through the rear partition wall of the main flue (1) and is connected to the middle of the rear end of the movable frame (501); and / or An inspection door (7) is provided on the partition wall at the end of the main flue (1).

8. The dust removal device according to any one of claims 1-7, characterized in that: The transmission mechanism (605) is an electro-hydraulic actuator or an electric actuator; preferably, the transmission mechanism (605) undergoes high-temperature resistant treatment on its exterior; preferably, the high-temperature resistant treatment includes spraying a high-temperature resistant coating onto the exterior of the transmission mechanism (605) or wrapping it with high-temperature resistant fabric; and / or Multiple ash collection holes (2) and multiple air guide pipes (3) are provided at the bottom and top of the main flue (1), respectively; the multiple ash collection holes (2) and multiple air guide pipes (3) are each arranged independently and evenly along the length of the main flue (1); preferably, the ash collection holes (2) are inverted frustum shapes.

9. A method for cleaning a floor-mounted sintering flue or a method for cleaning a flue using the cleaning device described in any one of claims 1-8, the method comprising the following steps: S1. Before the dust removal device is operated, the first scraper (603) and the second scraper (604) are first unfolded into an alternating arrangement with their openings facing the flue gas outlet direction; then, the transmission mechanism (605) extends the drive toothed plate (602) to extend out of the inner cavity of the moving plate (601), and the toothed plate (602) disengages from the originally opposing support plate (607). At this time, the moving plate (601) moves closer to the support plate (607) and sinks under its own weight, and the first scraper (603) and the second scraper... (604) As the moving plate (601) sinks and approaches the bottom wall of the main flue (1), at the same time, the two sets of drive mechanisms drive the moving plate (601) to move along the flue gas flow direction in the main flue (1) through the movable frame (501). During the movement, the first scraper (603) and the second scraper (604) scrape the ash accumulated in the main flue (1) into the ash discharge hole (2). When the moving plate (601) moves to the front end of the main flue (1), the ash cleaning operation is completed. S2. The transmission mechanism (605) retracts and drives the toothed plate (602) to retract into the inner cavity of the moving plate (601). After the rear end of the toothed plate (602) passes through the moving plate (601), it abuts against the support plate (607). At this time, the moving plate (601) is supported and lifted by the reaction force, and the first scraper (603) and the second scraper (604) float away from the bottom wall of the main flue (1). At the same time, the two sets of drive mechanisms drive the moving plate (601) to move through the movable frame (501). Finally, the traveling component (5) and the ash scraping component (6) return to the tail end of the main flue (1) to prepare for the next ash scraping operation.

10. A method for cleaning a floor-mounted sintering flue or a method for cleaning a flue using the cleaning device described in any one of claims 1-8, the method comprising the following steps: S1. Inside the main flue (1), the transmission mechanism (605) extends to drive the toothed plate (602) to extend out from the inner cavity of the moving plate (601). The toothed plate (602) meshes with the gear (608) to rotate, opening the first scraper (603) and the second scraper (604), so that they are arranged in an alternating pattern with their openings facing the flue gas outlet. At this time, the toothed plate (602) disengages from the support plate (607) that was originally in contact with it. The moving plate (601) then moves closer to the support plate (607) and sinks under its own weight. The first scraper... (603) and the second scraper (604) descend and approach the bottom wall of the main flue (1) as the moving plate (601) descends; at the same time, the two sets of drive mechanisms drive the moving plate (601) to move along the flue gas flow direction in the main flue (1) through the movable frame (501). During the movement, the first scraper (603) and the second scraper (604) scrape the ash accumulated in the main flue (1) into the ash discharge hole (2); when the moving plate (601) moves to the front end of the main flue (1), the ash cleaning operation is completed. S2. The transmission mechanism (605) retracts and drives the toothed plate (602) to retract into the inner cavity of the moving plate (601). After the rear end of the toothed plate (602) passes through the moving plate (601), it abuts against the support plate (607). At this time, the moving plate (601) is supported and lifted by the reaction force. The first scraper (603) and the second scraper (604) are driven to rotate to a state parallel to the flue gas flow direction and float away from the bottom wall of the main flue (1). At the same time, the two sets of drive mechanisms drive the moving plate (601) to move through the movable frame (501). Finally, the traveling component (5) and the ash scraping component (6) return to the tail end of the main flue (1) to prepare for the next ash scraping operation.

11. The method according to claim 9 or 10, characterized in that: In steps S1 and S2, the two sets of drive mechanisms drive the movable plate (601) to move via the movable frame (501). Specifically, the two motors (503) of the two sets of drive mechanisms rotate simultaneously, and the motors (503) drive the drive wheels (504) to mesh with the upper rail (402) to realize the movement of the drive wheels (504) relative to the upper rail (402), and drive the movable frame (501) and the movable plate (601) to move through the connecting action of the wheel frame (502); and / or In step S1, when the first scraper (603) and the second scraper (604) sink down and approach the bottom wall of the main flue (1), there is a gap between the first scraper (603) and the second scraper (604) and the bottom wall of the main flue (1); preferably, the gap is 1~5mm, more preferably 2-4mm.

12. The method according to claim 11, characterized in that: In step S1, when the resistance of the first scraper (603) and the second scraper (604) in advancing and cleaning is small, the motor (503) can be left off, and the drive wheel (504) can be moved relative to the upper track (402) by the pushing action of the flue gas, thereby driving the movable frame (501) and the moving plate (601) to move along the flue gas flow direction; when the resistance of the first scraper (603) and the second scraper (604) in advancing and cleaning is large, the motor (503) is turned on, and the drive wheel (504) moves relative to the upper track (402) under the combined action of the flue gas pushing and the motor (503), thereby driving the movable frame (501) and the moving plate (601) to move along the flue gas flow direction; and / or In step S2, the motor (503) can be turned on, and the hoist (501) and the moving plate (601) can be pulled back to the end position of the main flue (1) by the winch (506) without turning on the motor (503).

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