Pebble coal sorting device
By designing the sorting grid and dust removal components of the stone and coal sorting device, the effective separation of stone and coal particles is achieved, solving the problems of resource waste and environmental pollution, and improving sorting efficiency and device stability.
Patent Information
- Application Number
- CN202511505245.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-01-27
AI Technical Summary
In the existing technology, the way stone coal produced by medium-speed coal mills is processed leads to resource waste and increased impurities in the pulverizing system, which affects the operation of the coal mill and poses an environmental pollution risk.
Design a stone and coal separation device that uses a sorting grid and dust removal components to separate stone and coal from coal particles. The separation is carried out by gravity and particle size difference, and the dust removal components are used to purify coal dust and prevent dust leakage.
Successfully separating coal particles from coal pebbles avoids resource waste, reduces impurities entering the coal mill, ensures environmentally friendly emissions, reduces environmental pollution, and improves sorting efficiency and equipment stability.
Smart Images
Figure CN121402306A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of industrial material handling technology, and in particular to a stone and coal sorting device. Background Technology
[0002] Medium-speed coal mills are widely used in power plant boiler units due to their low investment and good economic efficiency. However, during operation, medium-speed coal mills produce coking coal, which mainly consists of coal gangue, broken coal pieces, stones, and coal powder, with a particle size generally not exceeding 50 mm and a bulk density of 1.0–1.5 t / m³. 3 The temperature is approximately 150℃. Currently, power plants mainly handle coke in two ways: either discarding it directly or adding it to the raw coal for re-grinding in a coal mill.
[0003] When the coal mill is operating well and the raw coal quality is normal, the amount of coke and the raw coal content are small, making direct disposal feasible. However, due to the poor quality of raw coal in most power plants, the coal mills generally operate poorly, leading to a significant increase in coke emissions, with a marked increase in the raw coal content. Directly discarding coke with a high raw coal content would be a waste of resources, while adding it back into the coal mill would increase impurities, affect the normal operation of the pulverizing system, and exacerbate wear and tear on the coal mill. Summary of the Invention
[0004] The present invention aims to at least partially solve one of the technical problems in the related art.
[0005] Therefore, embodiments of the present invention propose a stone and coal sorting device that can effectively sort stone and coal while taking into account clean and environmentally friendly requirements.
[0006] The stone and coal separation device of this invention includes: Warehouse body; A sorting assembly is inclined through the bin body. The sorting assembly has an inlet and an outlet located outside the bin body, and a sorting channel located inside the bin body. The height of the inlet is higher than the height of the outlet. A sorting grid plate is provided at the bottom of the sorting channel so that coal particles in the gravel and coal fall into the bin body through the holes of the sorting grid plate. An opening is provided at the top of the sorting channel so that coal dust generated by the flow of gravel and coal in the sorting channel flows into the bin body through the opening. A dust removal component is connected to the silo body and is used to extract coal dust from the silo body and purify the coal dust.
[0007] In some embodiments, the bottom of the silo is provided with a discharge port, and the discharge port is provided with a discharge valve.
[0008] In some embodiments, the lower part of the silo is inverted cone shape so that falling coal particles are collected at the discharge port.
[0009] In some embodiments, the sorting assembly includes an inclined conveying pipe with a rectangular cross-sectional shape, the two ports of the conveying pipe being the inlet and the outlet, respectively, and the cavity of the conveying pipe being the sorting channel.
[0010] In some embodiments, the inclination angle of the delivery pipe is 30° to 60°.
[0011] In some embodiments, the aperture size of the sorting grid plate is 1 mm to 10 mm.
[0012] In some embodiments, the dust removal assembly includes a dust collector and a negative pressure centrifugal fan. The inlet of the dust collector is connected to the inner cavity of the chamber, the outlet of the dust collector is connected to the inlet of the negative pressure centrifugal fan, and the outlet of the negative pressure centrifugal fan is connected to the atmospheric environment.
[0013] In some embodiments, the dust collector is located at the center of the top of the silo.
[0014] In some embodiments, the top of the silo is provided with a manhole door, which is eccentrically positioned.
[0015] In some embodiments, the chamber is provided with a maintenance staircase adjacent to the sorting channel, and the maintenance staircase is arranged parallel to the sorting channel.
[0016] The stone and coal sorting device of this invention successfully separates coal particles from stone and coal through the particle size screening effect of the sorting grid, avoiding the resource waste caused by directly discarding stone and coal with high coal content, and also avoiding the impurity problem brought by the stone and coal re-entering the coal mill. The closed structure of the bin and the combined use of the dust removal components ensure that there is no leakage of coal dust during the sorting process, avoiding dust pollution to the environment and meeting environmental protection requirements. Attached Figure Description
[0017] Figure 1 This is a side view schematic diagram of the stone and coal sorting device according to an embodiment of the present invention.
[0018] Figure 2 This is a schematic diagram of the structure of the stone and coal sorting device according to an embodiment of the present invention.
[0019] Figure label: 100 - cobblestones; 200 - coal particles; 1-Hopper body; 11-Discharge valve; 12-Manhole; 13-Maintenance ladder; 2-Sorting assembly; 21-Conveying pipe; 201-Inlet; 202-Outlet; 203-Sorting channel; 204-Sorting grating; 3-Dust removal components; 31-Dust collector; 32-Negative pressure centrifugal fan. Detailed Implementation
[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0021] The stone and coal sorting device of the present invention is described below with reference to the accompanying drawings.
[0022] like Figure 1 and Figure 2 As shown, the stone and coal sorting device of this embodiment includes a bin 1, a sorting component 2, and a dust removal component 3.
[0023] The bin 1 is a closed container for the sorting device. The sorting of the stone coal 100 is completed inside the bin 1, and the sorted coal particles 200 are temporarily stored inside the bin 1.
[0024] The sorting component 2 penetrates the bin body 1 at a specific angle and position. The sorting component 2 has an inlet 201 and an outlet 202, with the inlet 201 being higher than the outlet 202. That is, the inlet 201 is the upper outlet of the sorting component 2 exiting the bin body 1, and the outlet 202 is the lower outlet of the sorting component 2 exiting the bin body 1. The sorting component 2 has a sorting channel 203 located within the bin body 1.
[0025] Unsorted coke 100 is fed into the sorting channel 203 through the feed inlet 201. The coke 100 slides along the inclined sorting channel 203 towards the discharge outlet 202. A sorting grid plate 204 is provided at the bottom of the sorting channel 203 so that, during the downward slide of the coke 100, the coal particles 200 mixed inside fall into the bin 1 through the holes of the sorting grid plate 204. The sorted coke 100 is discharged from the discharge outlet 202, thus completing the sorting of the coke 100.
[0026] The top of the sorting channel 203 has an opening. During the flow of the stone coal 100 within the sorting channel 203, coal dust is generated and flows into the bin 1 through the opening. The dust removal component 3 is connected to the bin 1. The dust removal component 3 is used to extract the coal dust from the bin 1 and purify the coal dust, thereby reducing dust generation during the sorting of stone coal 100 and improving the environmental friendliness of the sorting device.
[0027] The stone and coal sorting device of this invention sorts stone and coal 100 within a closed silo 1, effectively separating coal particles 200 from the stone and coal 100 using gravity and particle size differences. Coal dust generated during the sorting process enters the silo 1 through an opening at the top of the sorting channel 203, and is subsequently extracted and purified by the dust removal component 3, preventing dust leakage and achieving environmentally friendly emissions.
[0028] Specifically, the sorting component 2 is inclined through the bin 1 at a specific angle, with the inlet 201 higher than the outlet 202. Unsorted coke 100 enters the sorting channel 203 from the inlet 201 and slides along the inclined channel towards the outlet 202. During the sliding process, coal particles 200 mixed inside the coke 100 fall into the bin 1 through the holes of the sorting grid 204, while the coke 100 remains on the sorting grid 204 and is discharged from the outlet 202.
[0029] The sorting grating 204 is densely covered with tiny holes, the size of which is designed to allow only coal particles 200 to pass through, while cobblestones 100 cannot pass through due to their larger particle size, thus achieving the separation of coal particles 200 and cobblestones 100.
[0030] The stone and coal sorting device of this invention successfully separates coal particles 200 from the stone and coal 100 through the particle size screening effect of the sorting grid plate 204. This avoids the resource waste caused by directly discarding the stone and coal 100 with a high coal content, and also avoids the impurity problem caused by the stone and coal 100 re-entering the coal mill. The closed structure of the bin 1 and the combined use of the dust removal component 3 ensure that there is no leakage of coal dust during the sorting process, avoiding dust pollution to the environment and meeting environmental protection requirements.
[0031] In some embodiments, such as Figure 1 As shown, the bottom of the silo 1 is provided with a discharge port, and the discharge port is provided with a discharge valve 11.
[0032] During the sorting process, coal particles 200 fall through the sorting grid 204 into the bottom of the bin 1. The discharge port provides a discharge channel for the coal particles 200, ensuring that the sorted coal particles 200 can be smoothly discharged from the bin 1 for recycling. A reasonable discharge port design can improve the discharge efficiency of coal particles 200, reduce the accumulation of coal particles 200 at the bottom of the bin 1, and ensure the continuity and efficiency of the sorting process.
[0033] The discharge valve 11 can adjust the discharge speed of coal particles 200 as needed, preventing excessively fast discharge that could cause coal particles 200 to overflow, or excessively slow discharge that could affect the sorting efficiency. The discharge valve 11 can be connected to the control system to achieve periodic automated discharge control, improving the operating efficiency and stability of the device.
[0034] The design of the discharge port and discharge valve 11 must ensure the airtightness of the silo 1 to prevent coal dust leakage and avoid environmental pollution. In the non-discharge state, the discharge valve 11 should be able to close completely to prevent air or other impurities from entering the silo 1, affecting the sorting effect and the negative pressure environment inside the silo 1.
[0035] The discharge valve 11 should be designed for easy inspection and maintenance, for example, by adopting a structure that is easy to disassemble and clean, to ensure long-term stable operation of the device. The operation of the discharge valve 11 should be simple, facilitating adjustment and control by operators, thereby improving the ease of operation of the device.
[0036] Furthermore, such as Figure 1 and Figure 2 As shown, the lower part of the silo 1 is inverted cone shape so that the falling coal particles 200 can be collected at the discharge port.
[0037] The inverted cone design guides the coal particles 200 towards the center during their descent. After passing through the sorting grid 204, the coal particles 200 naturally slide along the surface of the inverted cone towards the discharge port, thus achieving efficient concentration of the coal particles 200. This design avoids the dispersion of coal particles 200 at the bottom of the bin 1, reducing the possibility of coal particle accumulation.
[0038] The inverted cone-shaped structure allows coal particles 200 to smoothly converge at the discharge port, reducing blockages and obstructions during the discharge process. The discharge port is designed at the center of the bottom of the bin 1. Guided by the inverted cone shape, the coal particles 200 can be discharged from the bin 1 quickly and efficiently, improving the overall operating efficiency of the sorting device.
[0039] The traditional flat-bottomed silo design tends to cause coal particles 200 to accumulate in certain areas at the bottom, especially near the discharge port. The inverted cone design, with its inclined surface, effectively reduces the accumulation of coal particles 200, ensuring that the coal particles 200 are evenly distributed and discharged smoothly.
[0040] The inverted cone-shaped structure makes the distribution of coal particles 200 more concentrated at the bottom of the bin 1, reducing the difficulty of cleaning and maintenance. Operators can more easily clean the residual coal particles 200 at the bottom of the bin 1, ensuring the long-term stable operation of the unit.
[0041] In some embodiments, such as Figure 1 and Figure 2 As shown, the sorting assembly 2 includes an inclined conveying pipe 21, which is inserted obliquely into the upper middle part of the bin body 1. The conveying pipe 21 has a rectangular cross-sectional shape, with an inlet 201 and an outlet 202 at its upper and lower ends, respectively. The cavity of the conveying pipe 21 serves as a sorting channel 203. An opening is provided on the top wall of the conveying pipe 21, and the bottom wall of the conveying pipe 21 is formed by a sorting grid plate 204.
[0042] Understandably, the sorting assembly 2 adopts a rectangular tubular structure, which has high strength in terms of bending and torsion resistance, and can withstand the impact and friction forces generated during the sorting of gravel and coal 100. This structural design ensures the stability of the sorting assembly 2 during long-term operation and reduces failures caused by structural deformation or damage.
[0043] The rectangular tubular structure provides a larger internal space, which is beneficial for the arrangement of the sorting grid 204 and the passage of coal particles 200. The larger internal space reduces the risk of material blockage during the sorting process and improves sorting efficiency.
[0044] The rectangular tubular structure facilitates the installation and replacement of the sorting grating 204. Maintenance personnel can easily access the sorting channel 203 through the opening in the conveying pipe 21 to perform cleaning and maintenance. This design improves the maintainability of the device and reduces operational interruptions due to improper maintenance.
[0045] The oblique insertion design of the conveying pipe 21 allows unsorted gravel and coal 100 to slide naturally towards the discharge port 202 under gravity, reducing the need for additional power, lowering energy consumption, and improving the operating efficiency of the device. The conveying pipe 21 is obliquely inserted in the upper middle part of the bin 1, while the lower part of the bin 1 is a temporary storage area for coal particles 200, making the internal spatial layout of the bin 1 more rational. The sorting channel 203 is located inside the bin 1, while the inlet 201 and outlet 202 are located outside the bin 1, optimizing the overall structure and facilitating operation and maintenance.
[0046] In some embodiments, the inclination angle of the conveying pipe 21 is 30° to 60°. The inclination angle of the conveying pipe 21 can be an angle within the range of 30° to 60°, such as 30°, 35°, 40°, 45°, 50°, 55° or 60°.
[0047] An inclination angle between 30° and 60° ensures that the sliding speed of the coal particles 100 in the conveying pipe 21 is moderate. This moderate sliding speed allows the coal particles 200 sufficient time to pass through the sorting grid 204, ensuring the efficiency of the sorting process. An angle that is too small will cause the coal particles 100 to slide too slowly, increasing the sorting time; an angle that is too large may cause them to slide too fast, resulting in incomplete sorting.
[0048] A proper selection of the tilt angle ensures that the cobblestones 100 are evenly distributed in the conveying pipe 21, preventing material accumulation or uneven distribution and ensuring the uniformity and stability of the sorting. A moderate tilt angle helps to thoroughly separate the coal particles 200 and the cobblestones 100, reducing impurity residue and improving the sorting quality.
[0049] In some embodiments, the aperture size of the sorting grating 204 is from 1 mm to 10 mm. In stone and coal sorting devices, the aperture size design of the sorting grating 204 has a significant impact on sorting efficiency, coal particle recovery rate, and equipment maintenance. Different aperture sizes can be used to accommodate different operating conditions. Small orifice size (1mm to 3mm) is suitable for separating fine coal particles 200, especially when the coal dust content in the gravel coal 100 is high. The small orifice can effectively separate fine coal particles 200, ensuring that the coal dust falls to the bottom of the bin 1 through the orifice, reducing coal dust waste; it can achieve fine separation of coal particles 200, reduce the residual coal dust in the gravel coal 100, and improve the separation quality.
[0050] Medium aperture size (4mm to 6mm) is suitable for separating medium-sized coal particles (200mm) and is applicable to most stone and coal separation scenarios (100mm). The medium aperture size can better balance separation efficiency and maintenance requirements, ensuring smooth passage of coal particles (200mm) while reducing the risk of clogging. It is suitable for coal particles (200mm) of different sizes and has good versatility and adaptability.
[0051] Large aperture size (7mm to 10mm) is suitable for separating larger coal particles (200), especially in cases where the coal particles (200) are relatively large in gravelly coal (100). The large apertures allow for rapid discharge of the coal particles (200), improving sorting efficiency and reducing sorting time. The larger aperture design also reduces the likelihood of clogging, especially when the coal particles (200) are large.
[0052] The aperture size should match the particle size distribution of coal particles 200 in the coke 100. For example, if the coal particles 200 are mainly fine particles, a smaller aperture size should be selected; if the coal particles 200 are larger, a larger aperture size should be selected.
[0053] For gravelly coal with a high coal dust content (e.g., 100), smaller orifice sizes are needed to ensure effective coal dust separation, but care must be taken to prevent clogging. Larger orifice sizes can be considered for rapid sorting, while smaller orifice sizes are preferred for high-precision sorting. Larger orifice sizes are generally easier to maintain and clean, while smaller orifice sizes require more frequent inspection and cleaning.
[0054] In some embodiments, such as Figure 1 and Figure 2 As shown, the dust removal assembly 3 includes a dust collector 31 and a negative pressure centrifugal fan 32. The inlet of the dust collector 31 is connected to the inner cavity of the chamber 1, the outlet of the dust collector 31 is connected to the inlet of the negative pressure centrifugal fan 32, and the outlet of the negative pressure centrifugal fan 32 is connected to the atmospheric environment.
[0055] Dust collector 31 is used to capture and collect coal dust generated within the chamber 1, ensuring that the gas is purified before emission. Dust-laden gas enters dust collector 31 from chamber 1. As the gas passes through a filter medium (such as a filter bag), particulate matter is trapped, and clean gas passes through. The filter medium is cleaned or replaced periodically to maintain dust removal efficiency.
[0056] The negative pressure centrifugal fan 32 provides a negative pressure environment, causing the dust-laden gas in the chamber 1 to enter the dust collector 31, and then discharging the purified gas into the atmosphere. The fan impeller rotates to generate negative pressure, drawing the dust-laden gas into the dust collector 31. The purified gas is then discharged into the atmosphere through the fan.
[0057] The dust collector 31 and the negative pressure centrifugal fan 32 work together in the stone and coal sorting device to effectively capture coal dust, reduce emissions, and lower air pollution; reduce the concentration of coal dust in the bin, providing a safer and healthier working environment; maintain a negative pressure environment to ensure the smooth progress of the sorting process and avoid gas leakage; reduce coal dust accumulation, reduce equipment wear and corrosion, and extend service life; and ensure that emissions meet standards and avoid environmental violation risks.
[0058] Furthermore, such as Figure 1 and Figure 2 As shown, the dust collector 31 is located at the center of the top of the silo 1. Under negative pressure, the airflow inside the silo 1 typically flows upward from the bottom, carrying coal dust upwards. Placing the dust collector 31 at the center of the top effectively captures this rising coal dust, reducing the diffusion and deposition of coal dust inside the silo 1. The central position at the top also helps to uniformly extract dust-laden gas throughout the silo 1, ensuring the uniformity and efficiency of the dust removal effect.
[0059] In some embodiments, such as Figure 1 and Figure 2 As shown, a manhole door 12 is provided on the top of the bin body 1. The manhole door 12 provides a passage for maintenance personnel to enter the interior of the bin body 1, which facilitates the inspection, maintenance and cleaning of the internal structure of the sorting device.
[0060] The manhole 12 is eccentrically positioned at the top of the silo body 1. This eccentric placement of the manhole 12 effectively avoids the installation location of the dust collector 31, preventing spatial conflict between the two. The dust collector 31 is typically located at the top center to optimize coal dust extraction efficiency; therefore, the eccentric positioning of the manhole 12 ensures that the two do not interfere with each other spatially. This eccentric positioning also makes the spatial layout at the top of the silo body 1 more rational, avoiding space waste and structural complexity caused by overlapping positions of the manhole 12 and the dust collector 31.
[0061] In some embodiments, such as Figure 2 As shown, the storage chamber 1 is equipped with a maintenance staircase 13 adjacent to the sorting channel 203, and the maintenance staircase 13 is arranged parallel to the sorting channel 203.
[0062] If the amount of stone coal 100 discharged from the outlet 202 of the sorting component 2 is found to be abnormally reduced or the coal content is abnormally high, maintenance personnel can enter the bin 1 through the manhole 12 and use the maintenance ladder 13 as a stable foothold to inspect the sorting channel 203, clear the blocked stone coal 100 or replace the damaged sorting grid plate 204.
[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0067] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A stone and coal sorting device, characterized in that, include: Warehouse body; A sorting assembly is inclined through the bin body. The sorting assembly has an inlet and an outlet located outside the bin body, and a sorting channel located inside the bin body. The height of the inlet is higher than the height of the outlet. A sorting grid plate is provided at the bottom of the sorting channel so that coal particles in the gravel and coal fall into the bin body through the holes of the sorting grid plate. An opening is provided at the top of the sorting channel so that coal dust generated by the flow of gravel and coal in the sorting channel flows into the bin body through the opening. A dust removal component is connected to the silo body and is used to extract coal dust from the silo body and purify the coal dust.
2. The stone and coal sorting device according to claim 1, characterized in that, The bottom of the silo is provided with a discharge port, and the discharge port is provided with a discharge valve.
3. The stone and coal sorting device according to claim 2, characterized in that, The lower part of the silo is inverted cone-shaped so that falling coal particles are collected at the discharge port.
4. The stone and coal sorting device according to claim 1, characterized in that, The sorting assembly includes an inclined conveying pipe with a rectangular cross-section. The two ports of the conveying pipe are the inlet and the outlet, respectively, and the cavity of the conveying pipe is the sorting channel.
5. The stone and coal sorting device according to claim 4, characterized in that, The inclination angle of the conveying pipe is 30° to 60°.
6. The stone and coal sorting device according to claim 1, characterized in that, The aperture size of the sorting grating is 1mm to 10mm.
7. The stone and coal sorting device according to claim 1, characterized in that, The dust removal assembly includes a dust collector and a negative pressure centrifugal fan. The inlet of the dust collector is connected to the inner cavity of the silo, the outlet of the dust collector is connected to the inlet of the negative pressure centrifugal fan, and the outlet of the negative pressure centrifugal fan is connected to the atmospheric environment.
8. The stone and coal sorting device according to claim 7, characterized in that, The dust collector is located at the center of the top of the silo.
9. The stone and coal sorting device according to claim 1, characterized in that, The top of the silo is provided with a manhole door, which is eccentrically positioned.
10. The stone and coal sorting device according to claim 9, characterized in that, The chamber is equipped with a maintenance staircase adjacent to the sorting channel, and the maintenance staircase is arranged parallel to the sorting channel.