Dust treatment device for coal unloading of car dumper
By using a sealed cover and dry dust removal technology in the tipper coal unloading device, a slightly negative pressure environment is created. Combined with three-stage dust collection points, the problem of freezing of wet dust removal equipment in northern winters is solved, achieving stable dust removal and environmental improvement throughout the year.
Patent Information
- Application Number
- CN202511606113.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2025-12-12
AI Technical Summary
In existing technologies, wet dust removal equipment for tipper coal unloading devices is prone to freezing in northern winters, resulting in poor dust removal efficiency. Furthermore, dry dust removal is insufficient for controlling dust at different stages of the coal unloading process.
A dust treatment device for coal unloading on a tipper was designed. It adopts a large sealed cover to create a micro-negative pressure environment, combined with three-stage dust collection points, and utilizes dry dust removal technology. The dust collection system, consisting of the sealed cover, gas collection duct, dust collector, and induced draft fan, can accurately capture dust at each stage.
It achieves stable dust removal throughout the year, significantly reduces dust concentration, improves the working environment, reduces health hazards, and does not affect the production process. It is also easy to operate and maintain.
Smart Images
Figure CN121107145A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of coal dust treatment, in particular to a dust treatment device for a dumper unloading coal. BACKGROUND
[0003] At present, the dumper unloading coal dust treatment mainly adopts two kinds of technologies of dry dust removal and wet dust removal, wherein the wet dust removal is represented by the micro-fog efficiency increasing dust removal technology, the micron level particles are formed by atomizing water, and the affinity between water and dust is improved by adding special dust suppression liquid, so that the dust is wet and agglomerated and settled, and the wet dust removal is mainly used for dust treatment in links such as material storage and transportation, crushing, etc., but in the winter in the north, the temperature is often below zero, the water pipe and atomizing equipment of the wet dust removal are prone to freezing and icing, resulting in equipment failure, and after icing, the dust is easy to accumulate on the surface of the equipment, further affecting the normal operation of the dumper, and it is difficult to meet the stable dust removal demand in winter, the existing scheme of dry dust removal mainly focuses on extracting the coal dust in the belt guide groove under the material falling point of the dumper, but it is not targeted for the dust generated in different stages during the unloading process. CONTENT OF THE UTILITY MODEL
[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a dust treatment device for a dumper unloading coal.
[0005] The technical scheme adopted by the present application to solve its technical problems is: a dust treatment device for a dumper unloading coal, comprising a dust collector for providing a dust removal space, a gas collecting flue is communicated with the inlet end of the dust collector, a plurality of inclined branch pipes are communicated with a sealing cover on the outer wall of the gas collecting flue, a dust collector outlet flue is communicated with the outlet end of the dust collector, an exhaust assembly for discharging flue gas is communicated with the end of the dust collector outlet flue, a plurality of guide vanes are fixed in the sealing cover, a rectangular recess is formed in the bottom end of the sealing cover, a buffer connecting piece is fixed in the rectangular recess, a rectangular mounting plate is fixed to the bottom end of the buffer connecting piece, and a buffer plate for dust sealing is fixed in the rectangular mounting plate. The buffer connecting piece comprises a connecting fixed piece fixed in the recess of the sealing cover, a buffer piece is fixed to the bottom end of the connecting fixed piece, and the bottom end of the buffer piece is fixedly connected with the rectangular mounting plate.
[0006] Further, an electric valve is arranged at the outlet of the sealing cover, the electric valve is interlocked with the dumper hook platform, and the sealing cover is provided with an observation window and a small single door.
[0007] Further, the gas collecting flue is arranged along the outer side wall or support of the sealing cover, and the gas collecting flue is transported into the dust collector through the sealing cover and the inclined branch pipes.
[0008] Furthermore, the emission assembly includes an induced draft fan fixed at the end of the dust collector outlet flue, and the induced draft fan is fixed to a chimney at the air outlet. The induced draft fan is a centrifugal induced draft fan used to provide negative pressure power, so that a slight negative pressure is formed inside the sealing cover, and at the same time, the purified gas is drawn to the chimney.
[0009] Furthermore, the guide vane is configured as two separate parts, and a pin and a torsion spring are provided at the connection point of the guide vane, with a limit protrusion provided on the pin.
[0010] Furthermore, the multi-layered sealing covers, together with the gas collection flue, form a dust collection system. The sealing cover for the main collection point is located on the outside of the platform in the tipper chamber, while the sealing covers for the auxiliary collection points are located on both sides near the center line of the tipper.
[0011] The beneficial effects of this invention are: 1. Significant dust removal effect, protecting the environment: A micro-negative pressure environment is created by a large sealed cover, which, together with three-stage dust collection points, accurately captures dust at each stage. After treatment, the dust concentration at the work site meets the standards, effectively improving the working environment and reducing the harm of dust to the health of employees and the pollution to the surrounding environment.
[0012] 2. Adaptable to winter operating conditions: It adopts dry dust removal, which does not rely on water, and completely solves the problem of failure of wet dust removal (water spraying, micro-mist, etc.) due to freezing blockage at low temperatures in northern winters, so as to achieve stable operation throughout the year.
[0013] 3. Airflow design optimization: The total airflow and the distribution ratio of each dust collection point are determined through triple verification. The location of the dust collection point is optimized by utilizing the kinetic energy of dust. The minimum airflow is used to achieve an air exchange every half minute, balancing dust removal effect and energy consumption control.
[0014] 4. Convenient operation and maintenance, high degree of automation: The electric valves are interlocked with the tippler equipment for automatic opening and closing, and the sealed cover is equipped with an observation window and a maintenance slip door, which facilitates observation of the operating status and maintenance, reducing manual operation.
[0015] 5. Reasonable structure, no impact on production: The sealing cover adopts a semi-sealed design, which does not interfere with the operation of coal car entry and exit, tipper turning, etc. The dust collection point layout avoids key areas, realizing the synergy between dust removal and production. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the present invention.
[0017] Figure 2 yes Figure 1 A top-down view of the connection structure details.
[0018] Figure 3 yes Figure 1 Detailed diagram of the right-side connection structure.
[0019] Figure 4 yes Figure 1 Detailed cross-sectional view of the connection structure of the central sealing cover.
[0020] Figure 5 yes Figure 4 A detailed diagram of the connecting structure viewed from below.
[0021] Figure 6 yes Figure 4 Enlarged detail of the connection structure at point A in the middle. Explanation of reference numerals in the attached drawings: 1. Dust collector; 2. Gas collection duct; 3. Sealing cover; 4. Dust collector outlet duct; 5. Exhaust fan; 6. Chimney; 7. Guide vane; 8. Connecting fastener; 9. Buffer; 10. Rectangular mounting plate; 11. Buffer plate. Detailed Implementation
[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.
[0023] See Figures 1-6 This is a schematic diagram of the structure of the present invention, a dust treatment device for coal unloading on a tipper, including a dust collector 1 that provides dust removal space. The dust collector 1 is preferably a bag filter, with the processing air volume matching the total exhaust volume of the system. It is equipped with multiple polyester needle-punched felt filter bags inside. The filter bags are made of polyester short fibers and needle-punching process, with uniform fiber density and good air permeability. The filtration area of a single filter bag can reach 2-3㎡, and the overall filtration efficiency is not less than 99.9%, which can effectively intercept dust particles. It is equipped with a pulse jet cleaning system, which uses compressed air as the cleaning power. The jet frequency is controlled by an electromagnetic pulse valve to realize the rapid removal of dust from the surface of the filter bags and avoid filter bag clogging. A conical ash hopper and a screw conveyor are provided at the bottom for dust recovery. The conical ash hopper has a cone angle design to facilitate dust sliding and prevent ash accumulation. The screw conveyor uses stainless steel blades, and the conveying capacity matches the ash volume of the dust collector. The recovered dust can be directly transported to the coal bunker or dust collection tank for secondary utilization.
[0024] The inlet end of the dust collector 1 is connected to the gas collection duct 2, which is welded from seamless steel pipe. The outer wall of the gas collection duct 2 is connected to the sealing cover 3 through multiple inclined branch pipes. The sealing cover 3 is used to collect the dust generated during coal unloading. The sealing cover 3 adopts a semi-sealed design. The inclined branch pipe is a seamless steel pipe, which is inserted into the gas collection duct 2 at a 45° angle to avoid airflow collision and reduce resistance loss. The interface is sealed with a flange and graphite gasket. The flange is a flat welded steel flange. The graphite gasket has the characteristics of temperature resistance, corrosion resistance and good sealing performance, which can effectively prevent the leakage of dust-laden airflow.
[0025] The dust collector 1 is connected to the dust collector outlet flue 4 at its outlet end. The diameter of the dust collector outlet flue 4 is the same as that of the gas collecting flue 2. The inner wall is lined with wear-resistant ceramic to resist dust erosion. The ceramic lining is made of alumina and is fixed by high-temperature adhesive bonding to extend the service life of the flue. The end of the dust collector outlet flue 4 is connected to an exhaust assembly for discharging flue gas. The exhaust assembly includes an induced draft fan 5 and a chimney 6. The bottom is equipped with a concrete support and a lightning protection device. The lightning protection device adopts a combination of lightning rod and grounding electrode.
[0026] Multiple guide vanes 7 are fixed inside the sealing cover 3. The guide vanes 7 are set in two parts and are made of stainless steel, which has good corrosion resistance and structural strength. A pin and a torsion spring are set at the connection of the guide vanes 7, and a limit protrusion is set on the pin to limit the rotation angle range of the vanes. The opening of the vanes can be automatically adjusted according to the airflow speed to optimize the airflow distribution. A rectangular groove is provided inside the bottom end of the sealing cover 3. A buffer connector is fixed inside the rectangular groove. The buffer connector is used to reduce the vibration transmission of the sealing cover colliding with the coal on the unloading vehicle. The buffer connector includes a connecting fastener 8 fixed in the groove of the sealing cover 3. It is fixed to the bottom of the sealing cover 3 by expansion bolts to ensure a firm connection. A buffer 9 is fixed at the bottom end of the connecting fastener 8. The buffer 9 is a shock-absorbing spring with excellent shock absorption and buffering effect. It can absorb the energy generated by the impact. The bottom end of the buffer 9 is fixedly connected to the rectangular mounting plate 10. A buffer plate 11 for dust collection and sealing is fixed inside the rectangular mounting plate 10. The buffer plate 11 is a rubber plate with an integral molding process for the flange, which fits tightly with the contact part of the sealing cover.
[0027] An electric valve is installed at the outlet of the sealing cover 3, and the electric valve is interlocked with the unhooking platform of the tipper. The valve opens automatically when the unhooking platform is raised and closes automatically when the rotor is flipped. The sealing cover 3 is equipped with an observation window and a small single door. The observation window is made of double-layered tempered glass, which has good heat insulation and impact resistance, and allows the interior of the sealing cover 3 to be viewed. The small single door facilitates maintenance of the interior of the sealing cover 3.
[0028] The gas collection flue 2 is arranged along the outer wall or support of the sealing cover 3. The support is fixed on the concrete column and the support is welded to the concrete column through pre-embedded steel plates. Polyurethane pads are added between the support and the flue to reduce vibration, which can effectively reduce the transmission of flue vibration to the support. The gas collection flue 2 transports the dust-laden airflow to the dust collector 1 through the sealing cover 3 and the inclined branch pipe.
[0029] The emission assembly includes an induced draft fan 5 fixed at the end of the dust collector outlet flue 4. The induced draft fan 5 is fixed to a chimney 6 at the air outlet. The induced draft fan 5 is a centrifugal induced draft fan, which can be adjusted by frequency conversion according to the dust concentration during actual operation. It is used to provide negative pressure power to form a negative pressure inside the sealed cover, ensuring that the dust-laden airflow does not overflow. At the same time, it draws the purified gas to the chimney 6. The multi-layered sealed cover 3, together with the gas collection flue, forms a dust collection system. The sealed cover 3 for the main collection point is located outside the platform of the tipper chamber. The sealed cover 3 for the auxiliary collection point is located on both sides near the center line of the tipper. The sealed cover 3 for the main collection point is located outside the platform of the tipper chamber and is a rectangular cover. The cover is welded from thick steel plates and the inner wall is smoothed to reduce airflow resistance. It mainly captures a large amount of dust generated at the moment of unloading. The sealed cover 3 for the auxiliary collection point is located on both sides near the center line of the tipper and is a rectangular cover. It is used to capture dust that escapes from the inside and is lifted up with the rotation of the vehicle beam.
[0030] When using this invention: Dust generated during coal unloading by the tippler is first collected by a multi-layered sealing cover in the dust collection system. The rectangular sealing cover at the main collection point is located outside the tippler chamber platform, specifically designed to capture the large amount of dust generated during unloading. Its cover is made of thick steel plate welded together and has a smooth inner wall to reduce airflow resistance. The rectangular sealing covers at the auxiliary collection points are located on both sides of the tippler's centerline, used to collect dust escaping from the inside and rising with the rotation of the car beam. The stainless steel guide vanes inside the sealing cover are connected by pins and torsion springs, and can automatically adjust the opening according to the airflow speed and control the rotation range through limit protrusions to optimize airflow distribution. The buffer connector at the bottom is connected to the rectangular mounting plate through connecting fasteners and shock-absorbing springs. The rubber buffer plate can reduce the vibration transmission of the sealing cover when colliding with the coal unloading vehicle and enhance the sealing effect.
[0031] The electric valve at the outlet of the sealing cover is interlocked with the tipper unhooking platform. It automatically opens when the unhooking platform is raised and automatically closes when the rotor is flipped, ensuring accurate and efficient dust collection. The collected dust-laden airflow is transported to the gas collection flue through a seamless steel pipe inclined branch pipe that is connected at a 45° angle to the gas collection flue. The flat-welded steel flange and graphite gasket at the interface can prevent airflow leakage. The gas collection flue is arranged along the wall or support. The support is fixed to the concrete column by welding with the pre-embedded steel plate. The polyurethane gasket between the support and the flue can reduce vibration transmission.
[0032] Dust-laden airflow enters the dust collector through the gas collection duct. The polyester needle-punched felt filter bags inside filter the dust particles. The matching pulse jet cleaning system uses compressed air to periodically clean the dust on the surface of the filter bags through electromagnetic pulse valves to prevent clogging. The filtered dust slides down the conical ash hopper to the screw conveyor, which transports it to the coal bunker or dust collection tank for secondary use. The purified gas is discharged through the dust collector outlet duct. The alumina wear-resistant ceramic lining on the inner wall of the duct can resist dust erosion. Then, the centrifugal induced draft fan in the discharge component provides negative pressure to draw the gas to the chimney 6 for discharge.
Claims
1. A dust treatment device for coal unloading using a tipper, characterized in that, The dust collector (1) provides a dust removal space. The inlet end of the dust collector (1) is connected to a gas collection flue (2). The outer wall of the gas collection flue (2) is connected to a sealing cover (3) through multiple inclined branch pipes. The outlet end of the dust collector (1) is connected to a dust collector outlet flue (4). The end of the dust collector outlet flue (4) is connected to an emission assembly for discharging flue gas. Multiple guide vanes (7) are fixed inside the sealing cover (3). A rectangular groove is opened inside the bottom end of the sealing cover (3). A buffer connector is fixed inside the rectangular groove. A rectangular mounting plate (10) is fixed at the bottom end of the buffer connector. A buffer plate (11) for dust collection and sealing is fixed inside the rectangular mounting plate (10). The buffer connector includes a connecting fastener (8) fixed in the groove of the sealing cover (3), and a buffer (9) is fixed at the bottom end of the connecting fastener (8). The bottom end of the buffer (9) is fixedly connected to the rectangular mounting plate (10).
2. The dust treatment device for coal unloading using a tipper according to claim 1, characterized in that: An electric valve is provided at the outlet of the sealing cover (3), and the electric valve is interlocked with the tipper unhooking platform. The sealing cover (3) is also provided with an observation window and a small single door.
3. The dust treatment device for unloading coal using a tipper according to claim 1, characterized in that: The gas collection flue (2) is arranged along the outer wall or support of the sealing cover (3), and the gas collection flue (2) is transported to the dust collector (1) through the sealing cover (3) and the inclined branch pipe.
4. The dust treatment device for coal unloading using a tipper according to claim 1, characterized in that: The emission assembly includes an induced draft fan (5) fixed at the end of the dust collector outlet flue (4). The induced draft fan (5) is fixed to a chimney (6) at the air outlet. The induced draft fan (5) is a centrifugal induced draft fan used to provide negative pressure power, so that a slight negative pressure is formed inside the sealed cover, and at the same time, the purified gas is drawn to the chimney (6).
5. A dust treatment device for unloading coal using a tipper according to claim 1, characterized in that: The guide vane (7) is provided in two parts. A pin and a torsion spring are provided at the connection of the guide vane (7), and a limit protrusion is provided on the pin.
6. The dust treatment device for coal unloading using a tipper according to claim 1, characterized in that: The multi-layered sealing cover (3) is combined with the gas collection flue to form a dust collection system. The sealing cover (3) for the main collection point is located outside the platform of the tipper chamber, and the sealing cover (3) for the auxiliary collection point is located on both sides near the center line of the tipper.