A non-powered dust removal device for a belt conveyor and a pulverizer

Abstract

The application relates to the technical field of dust removal equipment, in particular to a non-powered dust removal device for a belt conveyor and a pulverizer, which comprises an isolation cover and a collecting cover installed on the isolation cover, a partition plate is arranged in the collecting cover, the partition plate divides the internal space of the collecting cover into a first collecting area and a second collecting area, an air port is left between the partition plate and the inner wall of the collecting cover, and the first collecting area and the second collecting area are communicated through the air port; dust in airflow is separated and collected in a regional mode, the collection effect of dust can be effectively improved, the air passage is ensured to be smooth, the dust removal efficiency is improved, dust is collected in a non-powered mode, the structure mode of the device can be effectively simplified, assembly and maintenance are facilitated, and the operation cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust removal equipment, in particular to a non-powered dust removal device for a belt conveyor and a pulverizer. BACKGROUND

[0002] In the coal, mining, power, metallurgy and other industries, the crushing and conveying of coal are key links in the production process. The belt conveyor, as the main coal conveying equipment, is widely used in the coal transfer process. However, a large amount of dust is generated due to the impact and airflow disturbance caused by the pulverizer when crushing coal, and the dust is conveyed to the lower belt conveyor during bulk material conveying. A large amount of dust escapes from various parts of the belt conveyor, causing dust pollution. Therefore, dust removal treatment is needed.

[0003] The existing dust removal methods are mostly wet dust removal or fan dust removal. When wet dust removal is used, coal is easily water-absorbed, which increases the moisture content of the coal and affects the product quality. When fan dust removal is used, the high equipment energy consumption leads to high operating costs, and the complex mechanical structure is prone to failure and difficult to maintain. Based on the above problems, a solution is needed that does not require external power, has a simple structure, and has high dust removal efficiency. SUMMARY

[0004] The present application provides a non-powered dust removal device for a belt conveyor and a pulverizer, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0006] A non-powered dust removal device for a belt conveyor, comprising a isolation cover and a collection cover mounted on the isolation cover, a partition plate is arranged in the collection cover, the partition plate divides the internal space of the collection cover into a first collection area and a second collection area, an air opening is left between the partition plate and the inner wall of the collection cover, and the first collection area and the second collection area are communicated through the air opening;

[0007] A plurality of partition bodies are arranged in the first collection area along the conveying direction of the conveying belt, an air guide channel is left between adjacent two partition bodies, and the air guide channel is communicated with the interior of the isolation cover, and a collection groove for collecting large particle impurities is formed in the top of each partition body;

[0008] A filter body is arranged in the second collection area, and the filter body is used for filtering small particle impurities.

[0009] In some embodiments of the present application, the diameter of the air guide channel gradually increases in the direction away from the conveying belt.

[0010] In some embodiments of the present application, a wind guide plate is inclinedly arranged at the bottom of each partition body, and the bottom of the wind guide plate extends into the isolation cover.

[0011] In some embodiments of the present application, the length of the air deflector extending in the isolation cover gradually increases along the conveying direction of the conveying belt.

[0012] In some embodiments of the present application, the bottom surface of the air deflector is provided with an air guiding arc slot.

[0013] In some embodiments of the present application, the top opening of the collecting groove is provided with an inclined opening, and an air guiding plate is arranged on the inclined opening, one side of the air guiding plate is used to guide the flow direction of the gas in the air guiding channel, and the other side of the air guiding plate is provided with a plurality of blocking bodies for blocking particulate matters.

[0014] In some embodiments of the present application, the filter body comprises a filter bag and a spring body connected to the tail of the filter bag, the spring body is mounted on the partition plate, and the opening of the filter bag passes through the collecting cover and is mounted on the top of the collecting cover by a compression ring.

[0015] In some embodiments of the present application, a plurality of blowing units are arranged on the isolation cover, the blowing unit comprises an air guiding pipe, both ends of the air guiding pipe are mounted on the isolation cover and communicate with the inside of the isolation cover, and the inner diameter of the air guiding pipe gradually decreases along the conveying direction of the conveying belt.

[0016] In some embodiments of the present application, the end of the isolation cover towards the conveying direction of the conveying belt is provided with a wind blocking curtain.

[0017] A pulverizer comprises a pulverizing part, a conveying belt and the above-mentioned unpowered dust removal device, the pulverizing part is used for pulverizing coal, the conveying belt is connected with the output end of the pulverizing part, and the unpowered dust removal device is used in cooperation with the conveying belt and collects dust on the conveying belt.

[0018] The technical scheme of the present application can achieve the following technical effects:

[0019] By separating and collecting the dust in the airflow in a regional manner, the collection effect of the dust can be effectively improved, the airflow can be ensured to be unobstructed, and the dust removal efficiency can be improved. Meanwhile, by collecting the dust in a unpowered manner, the structure of the device can be effectively simplified, assembly and maintenance can be facilitated, and the operation cost can be greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creating any inventive labor.

[0021] Figure 1 is a structural schematic diagram of the present application;

[0022] Figure 2 is a structural schematic diagram of the collecting cover in the embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of the cross section of the collecting cover in the embodiment of the present application;

[0024] Figure 4 is Figure 3 a structural schematic diagram from another perspective;

[0025] Figure 5 is a structural schematic diagram of the air guide plate and the blocking body in the embodiment of the present application;

[0026] Figure 6 is another shape schematic diagram of the blocking body in the embodiment of the present application.

[0027] Reference signs:

[0028] 100, conveying belt;

[0029] 200, isolation cover; 201, wind curtain;

[0030] 300, collecting cover; 301, partition; 302, separation body; 303, air guide channel; 304, collecting groove; 305, air port; 306, filter body; 307, air guide plate; 308, air guide arc groove; 309, air guide plate; 310, blocking body; 311, filter bag; 312, spring body; 313, pressing ring; 314, air guide pipe; 315, flat port. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] As Figures 1 to 4As shown, the unpowered dust removal device for the belt conveyor of the present application comprises an isolation cover 200 and a collecting cover 300 installed on the isolation cover 200, a partition plate 301 is arranged in the collecting cover 300, the partition plate 301 divides the internal space of the collecting cover 300 into a first collecting area and a second collecting area, an air port 305 is left between the partition plate 301 and the inner wall of the collecting cover 300, and the first collecting area and the second collecting area are communicated through the air port 305;

[0034] A plurality of partition bodies 302 are arranged in the first collecting area along the conveying direction of the conveying belt 100, a wind guide channel 303 is left between the adjacent two partition bodies 302, and the wind guide channel 303 is communicated with the inside of the isolation cover 200, and a collecting groove 304 for collecting large-particle impurities is formed in the top of the partition body 302;

[0035] A filter body 306 is arranged in the second collecting area, and the filter body 306 is used for filtering small-particle impurities;

[0036] In the present application, the isolation cover 200 can be buckled on the outer side of the conveying belt 100 through the rack, so that the isolation cover 200 and the conveying belt 100 can form a closed conveying channel, one end of the channel is located at the output end of the external crusher, and the other end of the channel is located at the position where the crushed coal is received, of course, the upper and lower sides of the conveying belt 100 can be located in the isolation cover 200, or the upper part of the conveying belt 100 for conveying coal can be located in the isolation cover 200, and the lower part can be directly exposed outside the isolation cover 200; When the external crusher crushes coal, the crushing units such as crushing hammers and crushing discs in the crusher run at high speed, the crushing units will damage the coal and generate a large amount of dust, and due to the high-speed operation of the crushing units, the air flow and the dust flow will be pushed, that is, the crushing units provide a positive pressure driving force for the air flow and the dust flow, the air flow carrying the dust will enter the isolation cover 200, that is, the dust will be conveyed synchronously with the bulk material on the conveying belt 100, at this time, the air in the isolation cover 200 is in a positive pressure state; The collecting cover 300 is installed on the isolation cover 200, since the bulk material is conveyed on the upper surface of the conveying belt 100, the collecting cover 300 needs to be installed on the top of the isolation cover 200, in the horizontal direction, the collecting cover 300 can be installed at a position close to the output end of the crusher or close to the discharging position of the conveying belt 100, and the specific installation number of the collecting cover 300 and the structure inside can be selected according to actual needs;

[0037] The baffle 301 in the collecting cover 300 is mainly used to divide the collecting cover 300 into two chambers, i.e. a first collecting area and a second collecting area. The first collecting area is located at the lower side and communicates with the isolation cover 200 through a plurality of air guide passages 303. The first collecting area is mainly used to collect large-particle dust. The air outlet 305 formed between the baffle 301 and the inner wall of the conveying belt 100 can allow the first collecting area and the second collecting area to communicate. In this way, the airflow in the first collecting area can flow into the second collecting area through the air outlet 305. The filter body 306 in the second collecting area can filter the airflow. In this way, the pure air passes through the filter body 306 and is discharged, and the small-particle impurities are intercepted in the second collecting area. In order to improve the efficiency, a plurality of groups of filter bodies 306 can be provided. Since the small-particle dust is intercepted in the second collecting area, the baffle 301 can be arranged in an inclined state to facilitate dust accumulation and unified cleaning. In this way, as the dust accumulates and increases, it will accumulate on one side of the baffle 301 due to gravity. In order to separate the dust from the air by inertia when the dust flows, the air outlet 305 and the filter body 306 can be distributed left and right in the horizontal direction, i.e. as shown in Figure 4 the airflow can flow to the right and upward in the collecting cover 300 to the position of the air outlet 305, pass through the air outlet 305, and then flow to the left in the reverse direction. The airflow passing through the filter body 306 will flow upward in the filter body 306 and be discharged to the outside of the collecting cover 300. In this way, the airflow direction is changed multiple times.

[0038] The collecting groove 304 is mainly used to collect large-particle dust. In order to facilitate cleaning, the bottom surface of the collecting groove 304 can be arranged in an inclined state. In this way, the dust falling into the collecting groove 304 can be easily accumulated and slid to one side of the collecting groove 304 by gravity. In order to facilitate the cleaning of the dust collected in the collecting cover 300, a first cleaning opening communicating with each collecting groove 304 and a second cleaning opening communicating with the second collecting area can be formed on the outer wall of the collecting cover 300. The first cleaning opening and the second cleaning opening need to be provided with sealing plates to ensure that the collecting cover 300 is sealed.

[0039] In use, the airflow agitated by the pulverizer and in a positive pressure state carries the dust to flow horizontally in the isolation cover 200, and the flow direction is consistent with the conveying direction of the conveying belt 100. Since the airflow is in a positive pressure state, when it moves to the collection cover 300, due to the sudden increase in space and the positive pressure effect of the airflow, the airflow carrying the dust flows towards the collection cover 300, that is, the static pressure between the airflows pushes the airflows to diffuse in the collection cover 300, and at the same time, the increase in space reduces the flow rate of the airflow, so that the flow rate of the dust is reduced, and the large-particle dust is separated from the airflow due to inertia. The airflow can enter the first collection area through multiple air guide channels 303. Since the air guide channels 303 are inclined, the airflow can smoothly flow into the first collection area, reducing the flow resistance of the airflow. Since the flow rate of the airflow decreases, the pushing force of the airflow on the dust decreases, and the large-particle dust naturally falls after separating from the air guide channel 303. The falling dust directly falls into the collection tank 304, thereby achieving the collection of large-particle dust. When the falling point of the large-particle dust is far away, it falls to the position of the adjacent air guide channel 303. At this time, the airflow in the air guide channel 303 provides a pushing force to the dust, making it move horizontally and fall into the corresponding collection tank 304. The airflow after deceleration flows into the second collection area through the air outlet 305. The filter 306 filters the airflow, thereby intercepting small-particle impurities. The filtered airflow is directly discharged outside the collection cover 300, and the intercepted dust falls on the partition plate 301, thereby achieving the collection of dust. In this collection process, no additional power supply is required.

[0040] By separating and collecting the dust in the airflow in a regional manner, the collection effect of the dust can be effectively improved, the air passage can be kept unobstructed, and the dust removal efficiency can be improved. At the same time, by collecting the dust in a power-free manner, the structure of the device can be effectively simplified, assembly and maintenance can be facilitated, and the operating cost can be greatly reduced.

[0041] To reduce the turbulence phenomenon caused by the airflow entering the collection cover 300 and improve the stability of the airflow, the diameter of the air guide channel 303 can be gradually increased in a direction away from the conveying belt 100 based on the inclined arrangement of the air guide channel 303, as shown in FIG. 6. This can reduce airflow separation and facilitate the conversion of the maximum kinetic energy of the airflow into static pressure, thereby helping the airflow to diffuse and avoiding excessive airflow speed and turbulence when entering the collection cover 300, thereby avoiding energy waste caused by excessive turbulence. Figure 4

[0042] It should be noted that in conventional structures, the space is generally directly or suddenly enlarged, which can cause severe turbulence of the airflow when entering a larger space. The flow rate of the airflow is subject to friction loss and cannot be effectively converted into static pressure inside the airflow, resulting in large energy loss and difficulty in controlling the flow direction of the dust. ​

[0043] Although the airflow in the isolation cover 200 is under positive pressure, due to the distance between the collection cover 300 and the conveying belt 100, part of the airflow and dust will stay in the isolation cover 200 and cannot enter the collection cover 300. In order to improve the dust collection effect, a wind guide structure extending into the isolation cover 200 can be arranged in the collection cover 300 to help guide the airflow. As shown in Figure 4 Each partition body 302 is provided with a wind guide plate 307 at the bottom, and the bottom of the wind guide plate 307 extends into the isolation cover 200.

[0044] When the airflow in the isolation cover 200 flows to the position of the wind guide plate 307, the wind guide plate 307 will block and guide the airflow, thereby helping the airflow to enter the collection cover 300 and reducing the residual amount of dust in the isolation cover 200. By using the wind guide plate 307, the distance between the collection cover 300 and the conveying belt 100 can be reduced, thereby reducing the airflow storage space.

[0045] As shown in Figure 4 The extension length of each wind guide plate 307 in the isolation cover 200 gradually increases along the conveying direction of the conveying belt 100. By gradually increasing, each wind guide plate 307 can uniformly distribute the airflow into the wind guide channel 303, thereby avoiding the concentration of airflow in the first wind guide channel 303, which can cause large particles to concentrate and affect the separation effect, improve the uniformity of airflow distribution, and reduce the collision rate and shielding rate between impurities.

[0046] It should be noted that since the bottom of each wind guide plate 307 extends into the isolation cover 200, part of the bulk material on the conveying belt 100 can contact the wind guide plate 307, which can hinder the conveying work of the wind guide plate 307. To avoid this phenomenon, the wind guide plate 307 can be made of soft materials such as silicone and rubber.

[0047] When the conveying belt 100 conveys the bulk material, the dust deposited on the conveying belt 100 or the dust deposited on the bulk material cannot flow synchronously with the airflow, so a large amount of dust cannot be effectively cleaned and collected. To solve this problem, the airflow direction in the isolation cover 200 corresponding to the collection cover 300 can be guided to flow towards the upper surface of the conveying belt 100, thereby blowing the dust on the conveying belt 100 and the dust on the bulk material. As shown in Figure 3As shown, the bottom surface of the air deflector 307 is provided with an air guide arc groove 308, that is, the front surface of the air deflector 307 is used to guide the airflow into the collection cover 300, and the bottom surface of the air deflector 307, as the back surface, can be provided with the air guide arc groove 308. When the airflow passes through the bottom of the air deflector 307, the airflow speed at the bottom of the air deflector 307 is relatively high compared to the airflow speed in the air guide arc groove 308. Therefore, the airflow at the bottom of the air deflector 307 is in a relatively negative pressure state. At this time, the airflow will flow towards the inside of the air guide arc groove 308. The air guide arc groove 308 guides the airflow again, so that the airflow flows obliquely downward. In this way, the airflow blows the dust on the conveying belt 100 and the dust on the bulk material, achieving the effect of pneumatic cleaning. After impacting the conveying belt 100 and the bulk material thereon, the airflow reverses and flows obliquely upward, thereby carrying the dust into the collection cover 300;

[0048] It should be noted that since the airflow in the isolation cover 200 mainly flows horizontally, the part of the airflow guided by the air guide arc groove 308 will not produce a large impact force on the conveying belt 100, and will not affect the normal conveying work of the conveying belt 100. After being guided by the air guide arc groove 308, the airflow in the isolation cover 200 corresponding to the collection cover 300 can flow horizontally in an S shape. Of course, in actual use, the air guide arc groove 308 can form an S bend, but it is not easy to form a continuous S bend. The arrangement of multiple air guide arc grooves 308 can prolong the path of this flow form.

[0049] To guide the airflow in the first collection area horizontally and make it flow towards the air port 305, and to intercept large particle impurities, the Figure 4 As shown, the top opening of the collection groove 304 is provided with a slope, and the slope is provided with an air guide plate 309. One side of the air guide plate 309 is used to guide the airflow in the air guide channel 303, and the other side of the air guide plate 309 is provided with a plurality of blocking bodies 310 for blocking particulate matter. By using the slope arrangement, the opening diameter of the collection groove 304 can be increased, making it easier for large particle impurities to enter the collection groove 304 along the inclined direction of the outer wall of the partition body 302, and improving the impurity collection effect. The air guide plate 309 is installed on the back side of the partition body 302, and is used in cooperation with the slope of the collection groove 304. The shape of the air guide plate 309 can guide the airflow in the air guide channel 303 horizontally on its back surface, so that the airflow flows horizontally. In this way, the large particle impurities in the airflow will fall synchronously due to inertia. The impurities directly move towards the front surface of the collection groove 304 or the front surface of the adjacent air guide plate 309, and the impurities falling on the front surface of the air guide plate 309 can roll along the air guide plate 309 and fall into the collection groove 304, thereby further improving the collection effect;

[0050] It should be noted that the several blocking bodies 310 arranged on the front surface of the air guide plate 309 are mainly used for blocking the large-particle impurities from moving along the air guide plate 309 in the upward direction, and allowing the large-particle impurities to move along the air guide plate 309 in the downward direction, thereby realizing the separate interception effect of the large-particle impurities;

[0051] In actual use, the shape of the blocking body 310 can be Figure 5 the shape of the inclined tooth shown in FIG. 6, or the shape of the angle plate shown in FIG. 7, and of course other shapes, as long as the shape can achieve the purpose of blocking and guiding the movement of the large-particle impurities, is within the protection scope of the present case. Figure 6

[0052] Since part of the dust will be adsorbed on the filter body 306 when the filter body 306 filters the dust, causing the filter body 306 to be blocked, in order to make the filter body 306 always have high flowability, the specific structure of the filter body 306 can be set, such as Figure 4 shown in FIG. 8, the filter body 306 includes a filter bag 311 and a spring body 312 connected with the tail of the filter bag 311, the spring body 312 is installed on the partition plate 301, and the opening of the filter bag 311 passes through the collecting cover 300 and is installed on the top of the collecting cover 300 through a compression ring 313;

[0053] The filter bag 311 is mainly used for filtering and intercepting small-particle dust in the airflow, and the collecting cover 300 is provided with a through hole allowing the open end of the filter bag 311 to pass through, and the tail end of the filter bag 311 is located in the collecting cover 300, and the compression ring 313 can fix the open end of the filter bag 311; when the airflow flows to the position of the filter bag 311, the airflow can blow the filter bag 311 to deform, at this time the filter bag 311 can pull the spring body 312 to elastically deform, so that the reverse elastic pulling force of the spring body 312 on the filter bag 311, so that the filter bag 311 can be in a state of shaking, facilitating the dust adsorbed on the filter bag 311 to fall off.

[0054] In order to further improve the cleaning effect of the dust on the conveying belt 100 and the dust on the bulk material, an air guide structure can be arranged on the isolation cover 200, so that the airflow in the isolation cover 200 that has not moved to the position of the collecting cover 300 is inclined downward and blown to the conveying belt 100, as shown in Figure 4 shown in FIG. 10, the isolation cover 200 is provided with several blowing units, and the blowing unit includes an air guide pipe 314, both ends of the air guide pipe 314 are installed on the isolation cover 200 and communicate with the isolation cover 200, and the inner diameter of the air guide pipe 314 gradually decreases along the conveying direction of the conveying belt 100;

[0055] ​The wide end of the air duct 314 is far from the collection hood 300, and the narrow end of the air duct 314 is close to the collection hood 300. When the airflow flows inside the isolation hood 200, some of the airflow will enter the air duct 314 from the wide end. The air duct 314 guides the airflow inside, so that the airflow flows downward at an angle when it is discharged from the narrow end of the air duct 314. In this way, the airflow will be blown onto the conveyor belt 100. The gradually changing inner diameter of the air duct 314 can concentrate the airflow and accelerate the airflow discharge speed, thereby improving the blowing effect.

[0056] To facilitate the entry of more airflow into the duct 314, the wide opening of the duct 314 can be set to an inclined state; to expand the blowing area on the conveyor belt 100, the narrow end of the duct 314 can be set to a flat opening 315 to improve the airflow diffusion area; of course, to improve the blowing effect and comprehensiveness, multiple ducts 314 can be set, or multiple ducts 314 can be arranged in an alternating manner.

[0057] Optimized from the above implementation, such as Figure 3 As shown, a windbreak curtain 201 is provided at the end of the isolation cover 200 facing the conveyor belt 100 in the conveying direction; the windbreak curtain 201 can be used to block the airflow inside the isolation cover 200, thereby reducing the amount of airflow discharged from the unloading end of the conveyor belt 100 and making it easier for more airflow to enter the collection cover 300.

[0058] A crusher includes a crushing section, a conveyor belt 100, and the aforementioned non-powered dust collection device. The crushing section is used to crush coal. The conveyor belt 100 is connected to the output end of the crushing section. The non-powered dust collection device works in conjunction with the conveyor belt 100 to collect dust on the conveyor belt 100. The non-powered dust collection device is stationary relative to the crushing section. Multiple non-powered dust collection devices can be arranged along the conveying direction of the conveyor belt 100. The conveyor belt 100 transversely conveys bulk materials within a complete channel composed of multiple isolation covers 200. The airflow generated by the crushing section during coal crushing can serve as the main power source for the airflow. This ensures that the airflow is under positive pressure when flowing within the isolation covers 200, thus facilitating power supply for subsequent airflow processing. It should be noted that during operation, a small amount of airflow is discharged through the inlet of the crushing section. However, since coal is continuously introduced into the crushing section from the inlet, and the movement of coal within the crushing section obstructs the airflow, the airflow discharged from the inlet of the crushing section is relatively small.

[0059] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A non-powered dust removal device for a belt conveyor, said dust removal device being connected to the output end of an external crusher, and the external crusher providing a positive pressure driving force for the airflow and dust output therefrom, characterised in that, The device comprises an isolation cover and a collecting cover installed on the isolation cover, a partition is arranged in the collecting cover, the partition divides the interior space of the collecting cover into a first collecting area and a second collecting area, an air port is left between the partition and the inner wall of the collecting cover, and the first collecting area and the second collecting area are communicated through the air port; A plurality of partition bodies are arranged in the first collecting area along the conveying direction of the conveying belt, an air guide channel is left between two adjacent partition bodies, the air guide channel is communicated with the interior of the isolation cover, and a collecting groove for collecting large-particle impurities is formed in the top of each partition body; A filter body is arranged in the second collecting area, and the filter body is used for filtering small-particle impurities; An air guide plate is obliquely arranged at the bottom of each partition body, and the bottom of the air guide plate extends into the isolation cover; The extension length of each air guide plate in the isolation cover gradually increases along the conveying direction of the conveying belt; An air guide arc groove is arranged on the bottom surface of the air guide plate; A plurality of blowing units are arranged on the isolation cover, each blowing unit comprises an air guide pipe, both ends of the air guide pipe are installed on the isolation cover and communicated with the interior of the isolation cover, and the inner diameter of the air guide pipe gradually decreases along the conveying direction of the conveying belt.

2. A non-powered dusting device for a belt conveyor as claimed in claim 1, wherein, The caliber of the air guide channel gradually increases along the direction away from the conveying belt.

3. A non-powered dusting device for a belt conveyor as claimed in claim 1, wherein, The top opening of the collecting groove is arranged as an inclined opening, an air guide plate is arranged on the inclined opening, one side of the air guide plate is used for guiding the flow direction of the gas in the air guide channel, and the other side of the air guide plate is provided with a plurality of blocking bodies for blocking particulate matters.

4. A non-powered dusting device for a belt conveyor as claimed in claim 1, wherein, The filter body comprises a filter bag and a spring body connected with the tail of the filter bag, the spring body is installed on the partition, and the opening of the filter bag penetrates through the collecting cover and is installed on the top of the collecting cover through a compression ring.

5. A non-powered dusting device for a belt conveyor as claimed in claim 1, wherein, The end of the isolation cover towards the conveying direction of the conveying belt is provided with a wind blocking curtain.

6. A shredder characterized by, The device comprises a crushing part, a conveying belt and a plurality of unpowered dust removal devices according to any one of claims 1 to 5, the crushing part is used for crushing coal, the conveying belt is connected with the output end of the crushing part, and the unpowered dust removal device is used in cooperation with the conveying belt and collects dust on the conveying belt.

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