A dust removal device

Abstract

The utility model relates to a dust removal device, it includes casing, air extraction unit, dust collecting unit, blow unit and prilling unit, prilling unit includes box, two prilling rollers and drive assembly, the outer surface of each prilling roller is equipped with recess, two prilling rollers contact each other and the recess on it mutually cooperate and form a plurality of granulating units in relative position, the width of recess gradually reduces from the opening end to the bottom, and its maximum depth is less than the maximum width. Through setting prilling unit on dust removal device, can suck into dust chamber's flying dust accurate extrusion into dense granular, further through the optimization to prilling roller, make the particle after extrusion more compact firm, will not because drop on the conveyer belt and cause structural damage or because the belt vibration, material impact influence and raise again, avoid the occurrence of secondary flying dust. In addition, the equipment can flexibly cope with the dust produced by different materials, and the versatility is good.

Description

Technical Field

[0001] This utility model relates to the field of dust removal equipment technology, specifically to a dust removal device. Background Technology

[0002] In industrial production, powdery or granular materials such as coal, coke, lime, and aluminum powder are typically transported continuously using belt conveyors. However, due to factors such as mechanical vibration, airflow, and collisions between materials during transport, a large amount of dust is inevitably generated. These suspended dust particles not only severely pollute the working environment and reduce equipment visibility, but also cause continuous damage to the respiratory system of operators. Long-term exposure to such high-dust environments can easily induce serious occupational respiratory diseases such as pneumoconiosis, posing a significant threat to workers' health.

[0003] To address the aforementioned issues, the applicant previously developed a single-point multi-functional dust removal device (patent number CN 111888839B). This device uses a negative pressure suction principle to collect dust into a receiving device, and then uses a spiral cutter to mechanically compress the collected dust, forming a relatively dense block structure before it falls back onto the conveyor belt. However, after extensive experimental verification by the applicant, this method still has the following problems:

[0004] First, the auger does not completely compress the dust: Although compression reduces the looseness of the dust, the compressed dust particles can still be structurally damaged by the impact of falling particles, causing secondary dust. Even particles that have not been structurally damaged may still be stirred up again by belt vibration, material impact, or airflow, making it impossible to completely eliminate secondary dust.

[0005] Secondly, the equipment has limited adaptability: the extrusion effect of the spiral auger may be unstable for different types of dust (such as light and fluffy coal powder and aluminum powder that is prone to static electricity), resulting in fluctuations in dust suppression efficiency.

[0006] The above background information is provided only to aid in understanding the concept and technical solution of this application. It does not necessarily belong to the prior art of this application, nor does it necessarily provide technical guidance. In the absence of clear evidence that the above information was disclosed before the filing date of this application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0007] The purpose of this invention is to provide a novel dust removal device.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] This utility model provides a dust removal device, which includes:

[0010] The housing has a dust removal chamber and an exhaust channel and a feeding channel connected to the dust removal chamber;

[0011] An extraction unit, the input end of which is connected to the extraction duct, is used to create a negative pressure in the dust removal chamber and draw dust into the dust removal chamber through the feeding duct;

[0012] A dust collection unit is provided in the dust removal chamber for filtering and collecting dust within the dust removal chamber;

[0013] A blowing unit, disposed on the housing, is used to generate airflow to blow off the dust accumulated on the dust collection unit; and,

[0014] A granulation unit, comprising a housing, two granulation rollers, and a drive assembly;

[0015] The housing is used to receive dust from the dust collection unit. The two granulating rollers are rotatably disposed in the housing and arranged parallel to each other around their own axis. The outer surface of each granulating roller is provided with multiple grooves distributed along the circumference and axial direction of the granulating roller. The two granulating rollers are in contact with each other, and the grooves on them cooperate with each other in relative positions to form multiple granulation units. The width of the grooves gradually decreases from the opening end to the bottom, and the maximum depth of the grooves is less than the maximum width of the grooves. The drive assembly is used to drive the two granulating rollers to rotate synchronously in opposite directions.

[0016] In some embodiments, the maximum depth of the groove is D, and the maximum width of the groove is L, satisfying the relationship: 2D≤L≤3D. Preferably, the maximum depth of the groove is 2mm to 4mm.

[0017] In some embodiments, the groove is spherical.

[0018] In some embodiments, the drive assembly includes a motor and a speed reducer connected to the output shaft of the motor, the speed reducer being a dual-shaft output speed reducer, with its two output shafts respectively connected to two granulation rollers.

[0019] In some embodiments, the drive assembly includes two meshing gears fixedly connected to the two granulation rollers, a motor, and a reducer connected to the output shaft of the motor. The reducer is a single-shaft output reducer, and the output shaft of the reducer is connected to either of the two gears.

[0020] In some embodiments, the dust removal chamber includes a first dust removal area and a second dust removal area located on the upper and lower sides and connected to each other, and the dust collection unit is at least partially located in the second dust removal area.

[0021] In some embodiments, the dust collection unit includes one or more filter cartridges.

[0022] In some embodiments, the dust removal device further includes a screw conveyor located at the bottom of the dust removal chamber, with the discharge end of the screw conveyor located directly above the housing, which has an open structure at both the top and bottom.

[0023] In some embodiments, the bottom of the dust removal chamber has a V-shaped structure.

[0024] In some embodiments, the dust removal chamber has a discharge port at the bottom, the granulation unit is located outside the receiving chamber and below the discharge port, and the inlet of the box body is directly opposite the discharge port.

[0025] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0026] This invention, by incorporating a granulation unit into the dust removal device, precisely compresses the dust drawn into the dust removal chamber into dense granules. Furthermore, through optimization of the granulation rollers, the compressed granules are made even more compact and robust, preventing structural damage from falling onto the conveyor belt or being re-entrained due to belt vibration or material impact, thus avoiding secondary dust generation. In addition, this equipment can flexibly handle dust generated by different materials, demonstrating good versatility. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the dust removal device provided in Example 1;

[0028] Figure 2 A schematic diagram of the dust removal device (housing not shown) provided in Example 1;

[0029] Figure 3 A bottom view of the dust removal device (housing not shown) provided in Embodiment 1;

[0030] Figure 4 A side view of the dust removal device (housing not shown) provided in Embodiment 1;

[0031] Figure 5 This is a schematic diagram of the structure of a granulation unit (driving components not shown) provided in Example 1;

[0032] Figure 6 A side view of a granulation unit (driving components not shown) provided in Example 1;

[0033] Figure 7 for Figure 6 A cross-sectional view of the AA plane;

[0034] Figure 8 This is a schematic diagram of the structure of a granulation roller provided in Example 1;

[0035] Figure 9 A schematic diagram of another granulation unit (driving components not shown) provided in Example 1;

[0036] Figure 10 A side view of another granulation unit (driving components not shown) provided in Example 1;

[0037] Figure 11 for Figure 10 A cross-sectional view of the BB plane;

[0038] The components include: 1. Support frame; 2. Shell; 21. Feed channel; 22. Exhaust channel; 3. Exhaust unit; 4. Dust collection unit; 41. Filter cartridge; 5. Spraying unit; 6. Granulation unit; 61. Box; 62. Granulation roller; 621. Groove; 63. Drive assembly; 631. Gear; 7. Screw conveyor; 71. Screw shaft; 72. Screw conveyor motor. Detailed Implementation

[0039] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0040] In the description of the embodiments of this utility model, it should be understood that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are only for the purpose of facilitating the description of the embodiments of this utility model 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, and therefore should not be construed as a limitation on the embodiments of this utility model.

[0041] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The foregoing disclosure provides many different implementations or examples for carrying out different structures of the embodiments of this utility model. To simplify the disclosure of the embodiments of this utility model, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the embodiments of this utility model. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this utility model; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0044] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0045] Example 1

[0046] A dust removal device, such as Figures 1 to 4 As shown, it includes a support frame 1, a housing 2, an extraction unit 3, a dust collection unit 4, a jet blowing unit 5, and a granulation unit 6. The housing 2 is mounted on the support frame 1 and forms a dust collection chamber with an extraction channel 22 and a feeding channel 21 connected to the dust collection chamber. The extraction unit 3 is mounted on the support frame 1, and its input end is connected to the extraction channel 22 to create a negative pressure in the dust collection chamber, thereby drawing dust into the dust collection chamber through the feeding channel 21. The dust collection unit 4 is located in the dust collection chamber and is used to filter and collect dust within the dust collection chamber. The jet blowing unit 5 is located on the housing 2 and is used to generate airflow to blow off the dust accumulated on the dust collection unit 4. The granulation unit 6 includes a housing 61, two granulation rollers 62, and a drive assembly 63. The housing 61 is mounted on the support frame 1 and is used to receive dust from the dust collection unit 4; two granulation rollers 62 are arranged in parallel inside the housing 61 and are configured to rotate around their own axis; the drive assembly 63 is mounted on the support frame 1 and is used to drive the two granulation rollers 62 to rotate synchronously in opposite directions.

[0047] Taking one of the granulation rollers 62 as an example, such as Figure 7 , Figure 8 and Figure 11As shown, the outer surface of the granulating roller 62 is provided with a plurality of grooves 621 distributed along the circumference and axial direction of the granulating roller 62. The width of the grooves 621 gradually decreases from the opening end to the bottom, and the maximum depth of the grooves 621 is less than the maximum width of the grooves 621. Two granulating rollers 62 are in contact with each other, and the grooves 621 on them cooperate with each other in relative positions to form a plurality of granulation units.

[0048] For loose dust such as pulverized coal, traditional granulating rollers 62 struggle to form structurally stable particles during the extrusion process. This is because the inter-particle forces in pulverized coal are weak, and the particles formed by conventional groove designs 621 are not firmly bonded internally. Particles falling onto the conveyor belt can still cause structural damage, and they are easily broken by belt vibration and material impact during transport, leading to secondary dust problems. This application optimizes the groove structure 621 of the granulating roller 62 by adopting a gradually narrowing groove design. The width of the groove 621 gradually decreases from the opening end to the bottom, while the depth of the groove 621 is also reduced, forming a progressive compression zone. This design has the following advantages: First, the dust is gradually compressed from wide to narrow within the groove 621, avoiding material rebound caused by instantaneous high pressure, resulting in a tighter internal bond between pulverized coal particles and improved density. Second, the coordinated adjustment of the groove depth and width ensures uniform transmission of compression force, reduces local stress concentration, and prevents particle breakage due to internal defects after forming. Third, this structure is not only suitable for pulverized coal, but also for other materials (such as materials with larger particle size, higher moisture content, or greater viscosity), achieving stable granulation and reducing the risk of secondary dust generation. This application also optimizes the distance between the two granulating rollers 62, ensuring they remain in contact at all times, thereby forming a stable compression zone. This ensures that the dust is subjected to uniform and continuous compression, avoiding problems such as unsuccessful or loose granulation due to gap fluctuations. According to the applicant's experiments, the optimized granulating rollers 62 can reduce the breakage rate of pulverized coal particles by 90% or more during transportation.

[0049] Furthermore, the maximum depth of the groove 621 is defined as D, and the maximum width of the groove 621 is defined as L. The relationship between the two is: 2D≤L≤3D. Preferably, the maximum depth of the groove 621 is 2mm to 4mm. In this embodiment, the groove 621 is spherical, with a maximum depth of 3mm and a maximum width of 8mm. Grooves that are too deep or too shallow, too large or too small, will affect the dust particle formation rate and breakage rate; therefore, the above-mentioned ranges are preferred.

[0050] The drive assembly 63 includes a motor and a reducer connected to the motor's output shaft. The reducer is a dual-shaft output reducer, with its two output shafts respectively connected to the two granulating rollers 62. This reducer employs a dual-shaft output structure, with its two output shafts directly connected to the two granulating rollers 62, directly and equally transmitting power to the two granulating rollers 62. This completely eliminates the problem of uneven torque distribution caused by meshing clearance, wear, and other factors in gear 631 transmission, ensuring that the two granulating rollers 62 are subjected to completely symmetrical forces, and that the two granulating rollers 62 always maintain completely consistent speed and pressure. This avoids the phase difference that may exist in traditional transmission methods, significantly improving the uniformity and density of particle formation. Furthermore, it is more conducive to the miniaturization of the equipment. Of course, in some other embodiments, the reducer can also be a single-shaft output reducer. In this type of embodiment, the drive assembly 63 also includes two meshing gears 631 respectively fixedly connected to the two granulating rollers 62, and the reducer's output shaft is connected to either of the two gears 631 (e.g., Figures 5 to 8 (As shown).

[0051] The housing 61 has an open-top and open-bottom structure, with the upper opening serving as the feed inlet and the lower opening as the discharge outlet. Dust enters the housing 61 through the feed inlet and is granulated by the two granulating rollers 62. The granulated dust then falls onto the conveyor belt below through the discharge outlet and is transported downstream with the material. To prevent dust from falling directly through the gap between the inner wall of the housing 61 and the granulating rollers 62 without being granulated by the rollers, a funnel-shaped guide channel (not shown) is provided at the feed inlet of the housing 61. This channel employs a reduced-size design to ensure that all incoming dust is guided to the effective working area of ​​the granulating rollers 62, effectively preventing unformed dust from leaking directly through the gap between the inner wall of the housing 61 and the granulating rollers 62. Mounting plates are provided at the upper and lower ends of the housing 61 for installation and fixation. Fixing methods include, but are not limited to, bolt and nut fixing, welding fixing, and snap-fit ​​fixing. The shape of the housing 61 is not specifically limited; for example, it is a cube structure.

[0052] The bottom of the dust collection chamber has a V-shaped structure, and a screw conveyor 7 is installed inside it. The discharge end of the screw conveyor 7 is located directly above the housing 61. The V-shaped structure enables automatic dust collection, and the collected dust undergoes preliminary compression during the screw conveying process, which is beneficial for subsequent granulation. The screw conveyor 7 includes a screw shaft 71 and a screw conveyor motor 72 connected to the screw shaft 71. The screw conveyor motor 72 drives the screw shaft 71 to rotate around its own axis, thereby conveying and initially compressing the dust.

[0053] The dust removal chamber includes a first dust removal area and a second dust removal area located on the upper and lower sides, separated by a partition. The partition has through holes (not shown in the figure) connecting the two areas. A feeding channel 21 communicates with the second dust removal area and may optionally have one or more channels. In this embodiment, two feeding channels 21 are symmetrically arranged, with the inlet of the feeding channel 21 located below the second dust removal area. An exhaust channel 22 communicates with the first dust removal area. An exhaust unit 3 includes a fan, which is connected to the feeding channel 21 via a pipe. A dust collection unit 4 includes one or more filter cartridges 41 corresponding to the through holes. The filter cartridges 41 pass through their corresponding through holes and are at least partially located within the second dust removal area, and are fixedly connected to a partition around the through holes. In this embodiment, the dust collection unit 4 has four filter cartridges arranged in pairs, and the structure of the filter cartridges 41 can refer to existing technologies in the art.

[0054] When the extraction unit 3 is running, it creates a negative pressure in the first dust removal area, causing the airflow from the second dust removal area and the feed channel 21 to flow through the filter cartridge 41 towards the first dust removal area. During this process, dust on the conveyor belt is drawn into the feed channel 21 by the negative pressure, and then intercepted and accumulated by the filter cartridge 41, achieving efficient dust removal.

[0055] The jet cleaning unit 5 includes a compressed gas storage tank, a pulse valve for controlling the release of compressed gas, and a jet pipe connected to the pulse valve. The compressed gas is preferably inexpensive and readily available compressed air. In this embodiment, the jet pipe has multiple nozzles corresponding to the filter cartridge 41, located above the filter cartridge 41, for periodically cleaning the filter cartridge 41 and maintaining the continuous operation of the dust removal device.

[0056] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A dust removal device, characterized in that, include: The housing (2) has a dust removal chamber and an exhaust channel (22) and a feed channel (21) connected to the dust removal chamber; The air extraction unit (3) is connected to the air extraction channel (22) at its input end. It is used to create a negative pressure in the dust removal chamber and draw dust into the dust removal chamber through the feed channel (21). A dust collection unit (4) is provided in the dust removal chamber for filtering and collecting dust in the dust removal chamber; A blowing unit (5) is disposed on the housing (2) and is used to generate airflow to blow off the dust accumulated on the dust collection unit (4); as well as, The granulation unit (6) includes a housing (61), two granulation rollers (62), and a drive assembly (63). The housing (61) is used to receive dust from the dust collection unit (4); two granulating rollers (62) are rotatably disposed inside the housing (61) and arranged in parallel around their own axis. The outer surface of each granulating roller (62) is provided with a plurality of grooves (621) distributed along the circumference and axial direction of the granulating roller (62). The two granulating rollers (62) are in contact with each other and the grooves (621) on them cooperate with each other in relative positions to form a plurality of granulation units. The width of the groove (621) gradually decreases from the opening end to the bottom. The maximum depth of the groove (621) is less than the maximum width of the groove (621). The drive assembly (63) is used to drive the two granulating rollers (62) to rotate synchronously in opposite directions.

2. The dust removal device according to claim 1, characterized in that, The maximum depth of the groove (621) is D, and the maximum width of the groove (621) is L. The relationship between the two is: 2D≤L≤3D.

3. The dust removal device according to claim 2, characterized in that, The maximum depth of the groove (621) is 2mm to 4mm.

4. The dust removal device according to claim 1, characterized in that, The groove (621) is spherical.

5. The dust removal device according to claim 1, characterized in that, The drive assembly (63) includes a motor and a reducer connected to the output shaft of the motor. The reducer is a dual-shaft output reducer, and its two output shafts are respectively connected to two granulation rollers (62).

6. The dust removal device according to claim 1, characterized in that, The drive assembly (63) includes two gears (631) that mesh with each other and are fixedly connected to the two granulation rollers (62), a motor, and a reducer connected to the output shaft of the motor. The reducer is a single-shaft output reducer, and the output shaft of the reducer is connected to either of the two gears (631).

7. The dust removal device according to claim 1, characterized in that, The dust removal chamber includes a first dust removal area and a second dust removal area located on the upper and lower sides and connected to each other. The dust collection unit (4) is at least partially located in the second dust removal area. And / or, the dust collection unit (4) includes one or more filter cartridges (41).

8. The dust removal device according to claim 1, characterized in that, The dust removal device also includes a spiral conveyor (7) located at the bottom of the dust removal chamber. The discharge end of the spiral conveyor (7) is located directly above the box (61), which has an open structure at the top and bottom.

9. The dust removal device according to claim 1 or 8, characterized in that, The bottom of the dust removal chamber has a V-shaped structure.

10. The dust removal device according to claim 1, characterized in that, The bottom of the dust removal chamber has a discharge port, the granulation unit (6) is located outside the dust removal chamber and below the discharge port, and the inlet of the box (61) is directly opposite the discharge port.

Images