Bag dust collector ash hopper cleaning device

Abstract

This invention discloses a dust collector hopper cleaning device. Addressing the problem of scattered small agglomerates on the inner wall of the hopper being difficult to remove completely by mechanical vibration, this invention employs a synergistic cleaning strategy of "aggregation + vibration crushing." A hydrated active cementitious medium (such as lime slurry or cement-based slurry) is sprayed through a gelation-promoting spray pipe, inducing the scattered small agglomerates to agglomerate into brittle large agglomerates. These aggregated large agglomerates are easily broken and fragmented under the impact of the vibrating structure, creating an arching effect between the fragments and promoting the peeling and shedding of residual scale. Simultaneously, a pre-formed protective film is used through a film-promoting spray pipe to achieve source protection, and the cleaning efficiency is further enhanced by the flushing and cleaning pipe and the insulation chamber. This solution makes agglomerate cleaning more thorough, significantly reduces the frequency of cleaning, and avoids secondary dust generation from mechanical scraping and the resource waste of wet washing. It is particularly suitable for long-term stable cleaning of industrial dust such as cement.

Description

Technical Field

[0001] This invention relates to the field of dust collector cleaning technology, and in particular to an automated cleaning device for the dust hopper of a bag filter, used to clean the dust clumps that have condensed on the inner wall of the dust hopper, ensuring the continuous and stable operation of the dust collection system. Background Technology

[0002] After long-term operation, the dust accumulated on the inner wall of the bag filter dust hopper forms scattered small clumps under the influence of temperature, humidity and chemical components. In severe cases, this can block the outlet and affect the smooth flow of ash.

[0003] Currently, three main cleaning methods are used: First, the silo vibration method (such as Chinese patent CN201921813137.3), which uses a vibrating motor or scraper to remove dust. However, due to the dispersed distribution and small size of small clumps, the vibration energy is diluted by numerous anchoring points, and the impact force obtained at a single point is insufficient to overcome the adhesion, making it difficult to effectively remove the clumps. Second, the mechanical scraping method is limited by the inverted conical cavity of the ash hopper, resulting in an unsatisfactory coverage area, many dead corners in the cleaning process, and a tendency to cause secondary dust generation. Third, wet washing (such as Chinese patent CN201410558536.5) faces the dilemma of difficult precise positioning and resource waste, and moisture can easily exacerbate scaling of certain materials. There is also a heat preservation and anti-condensation solution (Chinese patent CN201710374505.8), but it focuses on prevention rather than removal of existing clumps.

[0004] The fundamental limitation of existing solutions lies in their attempt to directly apply external force to dispersed small clumps, without addressing the underlying structural characteristics of the clumps. If scattered small clumps could be aggregated into brittle large clumps, not only would the external force be concentrated, but the aggregated large clumps would also exhibit an arching effect during crushing, facilitating complete detachment. However, currently, there is no known solution for cleaning ash hoppers that combines chemical agglomeration with physical crushing. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a dust hopper cleaning device for a bag filter. By introducing materials that can undergo a gelation reaction with the scattered small clumps on the inner wall of the dust hopper, the dispersed small clumps are aggregated into larger, more brittle clumps. Then, vibration and impact are used to break them up and remove them, thereby achieving automated and efficient cleaning of the dust hopper's accumulated dirt.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] This invention provides a dust hopper cleaning device for a baghouse dust collector, comprising a gelation-promoting spray pipe, a directional walking structure, and a vibration structure. The gelation-promoting spray pipe is disposed within the dust collection chamber of the dust hopper and is used to spray a gelation reaction medium onto the inner wall of the dust collection chamber, causing loose small clumps adhering to the inner wall to undergo a gelation reaction and polymerize into brittle large clumps. The directional walking structure is connected to the gelation-promoting spray pipe and is used to drive the gelation-promoting spray pipe to move along the contour trajectory of the inner wall of the dust collection chamber, so that the gelation reaction medium covers the inner wall of the dust collection chamber. The vibration structure is used to apply vibration to the dust hopper, breaking up the brittle large clumps and causing them to fall off and be discharged from the dust hopper.

[0008] Furthermore, the ash hopper cleaning device also includes a film-promoting spray pipe, which is arranged side by side with the gel-promoting spray pipe and is connected to the directional walking structure. The film-promoting spray pipe is filled with a release agent, which is used to form a protective film on the inner wall of the dust collection chamber to isolate the inner wall from the flue gas dust and inhibit the formation of initial scale from the source.

[0009] Furthermore, the gelation-promoting spray pipe and the film-promoting spray pipe are evenly spaced along the length of the pipe with multiple atomizing nozzles. The spraying direction of the atomizing nozzles is towards the inner wall of the dust collection chamber to ensure that the sprayed material is in uniform and sufficient contact with the inner wall.

[0010] Furthermore, the gel reaction medium is one or more of lime slurry, gypsum slurry, fly ash composite cementitious slurry, slag micro powder slurry, cement-based slurry, and alkali-activated cementitious slurry. The gel reaction medium contains hydration-active cementitious components. The hydration-active cementitious components can undergo hydration, cementation, and cross-linking reactions with the calcium salts, silicates, and ash components in the scattered small clumps, causing the scattered small clumps to aggregate into large clumps that are strong in integrity, brittle, and easily broken.

[0011] Furthermore, the directional walking structure includes a directional track opened along the inner contour of the upper part of the dust collection chamber, a walking frame movably installed in the directional track and connected to one end of the gelation-promoting spray pipe, and a circumferential rotating component set at the bottom outlet of the ash hopper and connected to the other end of the gelation-promoting spray pipe. The circumferential rotating component adaptively rotates and adjusts with the position change of the walking frame, and in conjunction with the inverted conical structure of the ash hopper, achieves full coverage of the inner wall of the dust collection chamber by the gelation-promoting spray pipe.

[0012] Furthermore, the ash hopper cleaning device also includes a power drive structure that is connected to the traveling frame. The power drive structure includes a surrounding motor and a transmission chain. The transmission chain is arranged inside the directional track contour. The transmission chain is meshed with a transmission gear. The transmission gear is rotatably connected to the lower end of the traveling frame. Limiting blocks are provided on both sides of the transmission chain to limit the lateral deviation of the transmission chain and ensure its stable movement trajectory.

[0013] Furthermore, a rigid guide rail is provided above the transmission chain, which is consistent with the trajectory of the directional track. At least one roller is in rolling contact on both sides of the rigid guide rail. The roller is located at the upper end of the walking frame, so that while relying on the chain drive to complete the circumferential power transmission, the overall movement is guided and limited and the operation is stable.

[0014] Furthermore, both the gel-promoting spray tube and the film-promoting spray tube pass through the walking frame of the directional walking structure and are connected to flexible conveying tubes. The ends of the two flexible conveying tubes are respectively connected to a liquid storage tank built into the mounting shell. The mounting shell is fixedly installed on the side wall of the bag filter. An automatic winding structure for winding the flexible conveying tube is provided inside the mounting shell. The winding speed of the automatic winding structure is adapted to the movement trajectory and speed of the walking frame, so that the flexible conveying tube adaptively winds up and unwinds with the circumferential movement of the gel-promoting spray tube and the film-promoting spray tube.

[0015] Furthermore, the shell wall of the ash hopper has a sandwiched cavity structure to form an insulation cavity. The insulation cavity is connected to the original high-temperature flue gas through a flue gas pipe, which is used to introduce the waste heat of the original high-temperature flue gas into the insulation cavity to maintain a constant temperature and insulation environment in the dust collection cavity, effectively preventing condensation and moisture on the inner wall, inhibiting the formation of stubborn scale from the source, and stabilizing the temperature and humidity environment for the gelation reaction, thus synergistically promoting the efficient shedding of caking. The insulation cavity structure combines the advantages of corrosion resistance and heat insulation of the ash hopper shell with energy-saving utilization of waste heat.

[0016] Furthermore, the bag filter is applied to the cement production process, and the ash hopper is used to collect dust containing calcium salts, silicates and ash components in the cement production process. The hydration active cementitious component contained in the gel reaction medium has homologous cementitious activity with the dust component to promote the agglomeration and aggregation of the scattered small agglomerates into the brittle large agglomerates.

[0017] Furthermore, the cement production process includes at least one of the following steps: raw material grinding, rotary kiln tail gas treatment, clinker cooling via grate cooler, cement grinding, raw material drying, and cement packaging; the original high-temperature flue gas introduced into the insulation cavity comes from the rotary kiln system in the cement production process, realizing the synergistic integration of on-site utilization of waste heat from the kiln system and ash hopper insulation.

[0018] Compared with the prior art, the present invention has the following beneficial effects: Firstly, by introducing a hydrated active gelling medium through a gelation-promoting spray pipe, scattered small clumps are actively induced to gel and aggregate into brittle large clumps. This fundamentally changes the traditional cleaning logic that relies solely on mechanical vibration to remove granular deposits. Because of their small size and scattered distribution, the vibration energy of scattered small clumps is diluted and spread among numerous anchoring points. The impact force obtained at a single point is insufficient to overcome their adhesion to the wall surface, making them difficult to shake off. On the other hand, the large clumps that have gelled into a whole are significantly more brittle internally and are easily broken and fragmented under the action of vibration. During the fragmentation process, the adjacent fragments generate an arching effect due to geometric interlocking. The fragments squeeze and push each other, further destroying the adhesion and anchoring between the remaining fragments and the wall surface, forming a chain of "vibration-arching-peeling" detachment. This makes the clump cleaning more thorough and significantly reduces the cleaning frequency. Secondly, a protective film is pre-formed on the inner wall through the film-forming spray pipe, which isolates the adsorption and adhesion of flue gas and dust to the inner wall from the source, forming a "prevention-cleaning" synergy with gel cleaning; Thirdly, through the combination of directional track, walking frame, circumferential rotating parts and the power drive structure of the surrounding motor-chain-gear, as well as the guiding support of rigid guide rails and rollers, the spray pipe can achieve full coverage and stable operation of the inner wall of the inverted conical dust collection chamber. Fourth, the integration of flexible conveying pipe, liquid storage tank, mounting shell and automatic winding structure ensures continuous and reliable material supply during the circumferential movement of the spray pipe; Fifth, the waste heat of flue gas is introduced through the interlayer insulation cavity to stabilize the temperature and humidity environment of the gelation reaction and inhibit condensation, thus taking into account both energy saving and cleaning efficiency. Sixth, in the cement production process, the gel medium and dust components have homologous gelling activity, resulting in a more complete reaction. Furthermore, the waste heat from the rotary kiln system can be directly used to heat the insulation cavity, enabling the recycling of process resources and long-term stable cleaning of ash hopper scale. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention applied to a bag filter dust collector; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a partial cross-sectional structural diagram of the present invention; Figure 4 for Figure 3 Enlarged view of a section at point II; Figure 5 for Figure 2 A magnified view of part I.

[0020] Figure label: Dust hopper 01, dust collection chamber 011, outlet 012, insulation chamber 02, flue gas duct 021, bag filter 03, gelation spray pipe 10, directional walking structure 20, film-promoting spray pipe 30, atomizing nozzle 40, power drive structure 50, directional track 21, walking frame 22, circumferential rotating component 23, surrounding motor 51, transmission chain 52, transmission gear 53, limit stop 521, guide rail 61, roller 62, flushing and cleaning pipe 70, pressurizing nozzle 71, flexible conveying pipe 80, flexible sleeve 81, mounting shell 90. Detailed Implementation

[0021] Example:

[0022] refer to Figure 1 This embodiment provides a cleaning device for the ash hopper 01 of a bag filter. It activates when the bag filter 03 is not in use and is used to clean the clumps that have accumulated on the inner wall of the ash hopper 01, ensuring smooth ash discharge and preventing blockage of the outlet 012. It introduces material that can react with the loose small clumps on the inner wall of the ash hopper 01 and aggregate into larger clumps. Utilizing the characteristic that these large clumps are easily broken and fragmented under vibration, it achieves automatic and efficient cleaning of the accumulated dirt in the ash hopper 01.

[0023] refer to Figure 2 The cleaning device includes: a gelation-promoting spray pipe 10, used to spray out the gelation reaction medium inside it, which reacts and polymerizes with the small clumps on the inner wall of the dust collection chamber 011 of the ash hopper 01 to form large clumps; a directional walking structure 20, connected to the gelation-promoting spray pipe 10 to drive it to circulate along the contour trajectory of the inner wall of the dust collection chamber 011, ensuring that the sprayed gelation reaction medium fully contacts all areas of the inner wall of the dust collection chamber 011 as much as possible, enhancing the reaction efficiency, ensuring the forming quality of the large clumps and the subsequent cleaning effect; and a vibration structure, used to generate impact vibration to break up the generated large clumps and discharge them from the outlet 012 of the ash hopper 01 (e.g., Figure 3 (As shown) it fell.

[0024] refer to Figure 2 , Figure 5 The directional walking structure 20 is also connected to a film-promoting spray pipe 30, which is arranged side by side with the gel-promoting spray pipe 10. It contains a release agent to form a protective film on the inner wall after spraying. This film is used when there is no or very little scale buildup on the inner wall, to isolate the inner wall from flue gas dust, reduce the adhesion between the two, and inhibit the initial formation of scale. The protective film can be applied when the ash hopper 01 is first used, or after a single ash cleaning and manual re-inspection for confirmation, allowing for film re-formation and reuse.

[0025] refer to Figure 5Both the gelation-promoting spray pipe 10 and the film-promoting spray pipe 30 spray the corresponding materials through atomizing nozzles 40. The atomizing nozzles 40 are evenly spaced along the length of the pipe, and their spraying direction is towards the inner wall of the dust collection chamber 011. By increasing the amount of material sprayed and specifying the spraying direction, sufficient contact between the reactants and the inner wall is further ensured, improving the uniformity and efficiency of the gelation reaction, as well as the film-forming effect.

[0026] To prevent clogging of the atomizing nozzles 40 and pressurizing nozzles 71 due to solidification of residual slurry or dust intrusion during long-term operation or shutdown of the equipment, this embodiment also includes a nozzle anti-clogging pretreatment mechanism. Specifically, after each spraying operation, each nozzle is briefly backwashed with clean water from the flushing pipe 70 to remove residual slurry residue in the nozzle cavity and nozzle orifice. Simultaneously, each atomizing nozzle 40 and pressurizing nozzle 71 has a resilient self-closing cap at its outlet. This cap automatically opens when there is spraying pressure inside the pipe and closes due to its own elasticity after spraying stops, effectively preventing external dust from entering the nozzle orifice during equipment shutdown. Furthermore, a filter screen is installed at the outlet of the gel reaction medium storage tank to intercept any particulate impurities that may be present in the slurry, reducing the risk of nozzle clogging at the source. These anti-clogging measures ensure that each nozzle maintains good atomization and smooth spraying during repeated start-ups and shutdowns.

[0027] The gel reaction medium can be selected from lime slurry, gypsum slurry, fly ash composite cementitious slurry, slag micro powder slurry, cement-based slurry and alkali-activated cementitious slurry, etc., all of which contain hydration active cementitious components, which can react with calcium salts, silicates and ash components in small clumps to undergo hydration, cementation and cross-linking reactions, and aggregate the scattered small clumps into larger clumps with stronger overall brittleness.

[0028] refer to Figure 3 , Figure 4 The directional walking structure 20 includes a directional track 21 opened along the inner contour of the upper part of the dust collection chamber 011. A walking frame 22 is movably installed within the directional track 21. The walking frame 22 is connected to the power drive structure 50 (e.g., Figure 1 (As shown) It is connected to the transmission and is also connected to one end of the gelation spray pipe 10 and the film-forming spray pipe 30. The other end of the two pipes is connected to the circumferential rotating part 23, which is located at the outlet 012 at the bottom of the ash hopper 01.

[0029] Therefore, the power drive structure 50 can drive the walking frame 22 to move along the directional track 21, thereby driving the upper ends of the two pipes to move along the upper contour of the dust collection chamber 011. At the same time, in conjunction with the inverted conical structure of the ash hopper 01, the circumferential rotating part 23 at the bottom can adaptively rotate and adjust with the continuous change of the position of the upper end of the pipe, thereby realizing the full coverage operation along the inner wall of the pipe.

[0030] refer to Figure 2 The power drive structure 50 includes a surrounding motor 51 and a transmission chain 52 (e.g., ...) that drives the motor. Figure 4 As shown), the transmission chain 52 is arranged inside the directional track 21 according to its outline, and is meshed with the transmission gear 53 (as shown). Figure 4 As shown), the transmission gear 53 is connected to the lower end of the traveling frame 22 by its own rotation. Therefore, the transmission chain 52 can drive the transmission gear 53 and the traveling frame 22 to move along the trajectory of the directional track 21, thereby achieving full coverage of the inner wall of the dust collection chamber 011 by the two pipes (the transmission chain 52 and the transmission gear 53 are shown in the figure in a simplified manner, and their structures are not shown in detail). Reference Figure 4 The transmission chain 52 is also provided with limit blocks 521 on both sides to limit the lateral displacement of the transmission chain 52 and ensure its movement trajectory is stable.

[0031] To ensure the stability of the traveling frame 22 during movement, a rigid support transmission is also provided, the specific structure of which is as follows. (Reference) Figure 4 Above the transmission chain 52, a rigid guide rail 61 is provided, which is aligned with the trajectory of the directional track 21. At least one roller 62 is rolled in contact with both sides of the guide rail 61, and the roller 62 is located on the upper end of the traveling frame 22. Therefore, while the traveling frame 22 completes the circumferential power transmission through chain drive, its roller 62 also follows the trajectory of the guide rail 61, thereby achieving the guiding and limiting of the overall movement and smooth operation.

[0032] refer to Figure 1 , Figure 5 The gelation-promoting spray pipe 10 and the film-promoting spray pipe 30 are also connected to the flexible conveying pipe 80 through the walking frame 22. The two flexible conveying pipes 80 are flexible and easily deformable. Their ends are respectively connected to the liquid storage tanks. The two liquid storage tanks are respectively installed with the gelation reaction medium and the release agent. The liquid storage tanks are all built into the mounting shell 90. The mounting shell 90 is fixedly installed on the side wall of the bag dust collector 03.

[0033] To enable the flexible conveying tube 80 to adapt its distance from the liquid storage tank as the spray pipe moves circumferentially, an automatic winding structure is also provided inside the mounting shell 90. This structure is used to wind up the flexible conveying tube 80 and can automatically wind or unwind it as needed for the length. The winding and unwinding actions and speed of the automatic winding structure are adapted to the starting position of the traveling frame 22, the distance changes of the trajectory, and the speed of the movement (the liquid storage tank, the automatic winding structure, and the water storage tank mentioned below are not shown in the figure).

[0034] During the process of loose small clumps agglomerating into larger clumps on the inner wall of dust collection chamber 011, then being broken up and detached by vibration, the original small clumps can be largely cleaned up. However, due to differences in the degree of gel polymerization and the location of fracture under stress, some thinner and smaller scale particles may remain as clumps. Therefore, for more thorough cleaning, a residual scale removal structure is added. (Reference) Figure 1 , Figure 5 This is achieved by adding a flushing and cleaning pipe 70, which is arranged parallel to the gelation spray pipe 10 and contains tap water. The water supply tank is still connected through the flexible conveying pipe 80 and built into the mounting shell 90. The flushing and cleaning pipe 70 is equipped with multiple pressurized nozzles 71 at equal intervals along its length, so that the water in the pipe can be sprayed out at a certain pressure, thereby flushing off the small scale residues on the inner wall for a deeper and more thorough cleaning. The vibration structure can be implemented by a vibrating motor, which is installed on the outer wall of the ash hopper 01.

[0035] To prevent the flexible conveying tube 80 from twisting and deforming during its movement, a flexible sleeve 81 is also fitted over all three components (e.g., ...). Figure 5 As shown), the three components are gathered and tightly bound together, and arranged in a neat manner into an integrated structure. The flexible sleeve 81 is wound and bound together with the flexible conveying tube 80 onto the automatic winding structure.

[0036] refer to Figure 3 , Figure 4 In this embodiment, a cavity is formed in the shell wall of the ash hopper 01 to create an insulation cavity 02. The insulation cavity 02 is insulated by introducing the residual heat of the original high-temperature flue gas through the flue gas pipe 021. By introducing the residual heat of the flue gas through the insulation cavity 02, a constant temperature can be maintained inside the ash hopper 01, effectively preventing condensation and moisture on the inner wall and inhibiting the formation of stubborn scale from the source. At the same time, this insulation effect can also stabilize the temperature and humidity environment inside the cavity, ensuring uniform and sufficient gelation reaction, weakening the anchoring effect of the protective film on the scale, and synergistically promoting efficient removal of clumps and more thorough cleaning. In addition, it also has the advantages of corrosion protection and heat insulation of the ash hopper 01 shell and energy-saving utilization of residual heat, enabling long-term and stable cyclic cleaning of scale in the ash hopper 01.

[0037] As an alternative or supplementary implementation method for the heat source of the insulation cavity 02, an electric heater or steam coil can also be added inside the interlayer cavity of the insulation cavity 02. The electric heater can be in the form of heating wire or heating film, evenly distributed along the inner side of the interlayer wall of the ash hopper 01 shell, and works with a temperature sensor and thermostat to automatically regulate the temperature inside the insulation cavity 02. When the waste heat from the flue gas is insufficient or during equipment shutdown for maintenance, the electric heater provides independent heating to maintain the wall temperature of the ash hopper 01 above the dew point temperature, preventing condensation and scale buildup. The steam coil method involves spirally arranging steam coils along the conical surface of the ash hopper 01 inside the insulation cavity 02, introducing low-pressure steam from the existing steam network of the plant. The latent heat released by steam condensation is used to evenly heat the shell wall of the ash hopper 01. A drain valve is installed at the end of the coil to remove condensate. Both methods can be used in parallel with the waste heat insulation of the flue gas or used independently, flexibly selected according to the on-site heat source conditions.

[0038] Work process:

[0039] When using the ash hopper 01 for the first time, start the film-promoting spray pipe 30 to spray the release agent onto the inner wall, forming a protective film that isolates the flue gas dust from the inner wall. This inhibits the formation of scale and reduces the frequency of cleaning during subsequent dust collection.

[0040] After prolonged operation, some scattered small clumps will inevitably form on the inner wall of the dust collection chamber 011. At this time, the gelation-promoting spray pipe 10 is activated to spray a gel reaction medium onto the inner wall, which reacts with the small clumps to polymerize into larger clumps. During the polymerization process, some clumps, due to their weak adhesion to the wall surface, fall off by their own weight; while some large clumps that do not fall off rely on their brittleness and easy breakage characteristics, and are broken and detached by the vibration structure, thus achieving basic cleaning of the small clumps on the inner wall. However, even smaller dirt clumps may still remain.

[0041] Therefore, the flushing and cleaning pipe 70 is activated, causing water inside the pipe to be sprayed onto the inner wall at a preset pressure, which flushes away small scale particles, achieving a deep and thorough cleaning of the scale buildup on the inner wall.

[0042] After completing the above cleaning, as needed: manually enter the ash hopper 01 for re-inspection and manually clean any remaining thin layer of scale, then restart the film-forming spray pipe 30 to reform the protective film; and repeat the above cleaning operation.

[0043] The above description is merely a specific example of the present invention and does not constitute any limitation on the present invention. Obviously, those skilled in the art, after understanding the content and principles of the present invention, may make various modifications and changes in form and detail without departing from the principles and structure of the present invention; however, these modifications and changes based on the spirit of the present invention are still within the scope of protection of the claims of the present invention.

Claims

1. A dust hopper cleaning device for a bag filter, characterized in that, include: The gelation spray pipe (10) is set in the dust collection chamber (011) of the ash hopper (01) and is used to spray the gelation reaction medium onto the inner wall of the dust collection chamber (011) so that the scattered small clumps attached to the inner wall undergo a gelation reaction and polymerize to form brittle large clumps. The directional walking structure (20) is connected to the gelation spray pipe (10) and is used to drive the gelation spray pipe (10) to move along the contour trajectory of the inner wall of the dust collection chamber (011) so that the gelation reaction medium covers the inner wall of the dust collection chamber (011); A vibrating structure is used to apply vibration to the ash hopper (01) to break up the brittle large agglomerates and cause them to fall off and be discharged from the ash hopper (01).

2. The ash hopper cleaning device according to claim 1, characterized in that... It also includes a film-promoting spray tube (30), which is arranged side by side with the gel-promoting spray tube (10) and is connected to the directional walking structure (20). The film-promoting spray tube (30) is filled with a release agent, which is used to form a protective film on the inner wall of the dust collection chamber (011) to isolate the inner wall from the flue gas dust.

3. The ash hopper cleaning device according to claim 2, characterized in that... The gelation-promoting spray pipe (10) and the film-promoting spray pipe (30) are evenly spaced along the length of the pipe with multiple atomizing nozzles (40), and the spraying direction of the atomizing nozzles (40) is towards the inner wall of the dust collection chamber (011).

4. The ash hopper cleaning device according to claim 1, characterized in that... The gel reaction medium is one or more of lime slurry, gypsum slurry, fly ash composite cementitious slurry, slag micro powder slurry, cement-based slurry, and alkali-activated cementitious slurry. The gel reaction medium contains hydration-active cementitious components, which can undergo hydration, cementation, and cross-linking reactions with calcium salts, silicates, and ash components in the scattered small clumps.

5. The ash hopper cleaning device according to claim 1, characterized in that... The directional walking structure (20) includes: A directional track (21) is provided along the inner contour of the upper part of the dust collection chamber (011); The walking frame (22) is movably installed in the directional track (21), and the walking frame (22) is connected to one end of the gelation spray pipe (10); A circumferential rotating component (23) is located at the outlet (012) at the bottom of the ash hopper (01). The other end of the gelation spray pipe (10) is connected to the circumferential rotating component (23). The circumferential rotating component (23) makes adaptive rotation adjustment as the position of the walking frame (22) changes.

6. The ash hopper cleaning device according to claim 5, characterized in that... It also includes a power drive structure (50) that is connected to the walking frame (22). The power drive structure (50) includes a surrounding motor (51) and a transmission chain (52). The transmission chain (52) is arranged inside the directional track (21) along its contour. The transmission chain (52) is meshed with a transmission gear (53). The transmission gear (53) is rotated and connected to the lower end of the walking frame (22). Limiting blocks (521) are provided on both sides of the transmission chain (52) to limit the lateral deviation of the transmission chain (52).

7. The ash hopper cleaning device according to claim 6, characterized in that... A rigid guide rail (61) is provided above the transmission chain (52) and is consistent with the trajectory of the directional track (21). At least one roller (62) is rollingly contacted on both sides of the rigid guide rail (61), and the roller (62) is located on the upper end of the walking frame (22).

8. The ash hopper cleaning device according to claim 5, characterized in that... Both the gelation-promoting spray tube (10) and the film-promoting spray tube (30) pass through the walking frame (22) of the directional walking structure (20) and are connected to flexible conveying tubes (80). The ends of the two flexible conveying tubes (80) are respectively connected to a liquid storage tank built into the mounting shell (90). The mounting shell (90) is fixedly installed on the side wall of the bag filter (03). An automatic winding structure for winding up the flexible conveying tubes (80) is provided inside the mounting shell (90). The winding and unwinding speed of the automatic winding structure is adapted to the movement trajectory and movement speed of the walking frame (22).

9. The dust hopper cleaning device for a bag filter according to any one of claims 1-8, characterized in that... It is applied to the cement production process to collect dust containing calcium salts, silicates and ash in the cement production process. The hydration active gelling component contained in the gel reaction medium has homologous gelling activity with the dust component to promote the agglomeration and aggregation of the scattered small agglomerates into the brittle large agglomerates.

10. The dust hopper cleaning device for a bag filter according to claim 9, characterized in that... The cement production process includes at least one of the following steps: raw material grinding, rotary kiln tail gas treatment, clinker cooling by grate cooler, cement grinding, raw material drying, and cement packaging; the shell wall of the ash hopper (01) is a sandwich cavity structure to form an insulation cavity (02), and the insulation cavity (02) is connected to the original high-temperature flue gas of the rotary kiln system in the cement production process through a flue gas pipe (021).

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