A mine-used wet dust removal device for grading treatment according to dust particle size difference

Abstract

The application relates to the dust removal technical field and discloses a mine wet dust removal device for grading treatment according to dust particle size difference, which comprises a cyclone dust removal section, a vibrating string grate dust removal section and a demisting device. The cyclone dust removal section comprises a cyclone dust removal section shell, a cyclone dust removal spraying device and a cyclone impeller. The cyclone dust removal spraying device and the cyclone impeller are sequentially arranged in the cyclone dust removal section shell along the direction of airflow advancement in the cyclone dust removal section shell. A water inlet and a blow-off port are arranged at the bottom of the cyclone dust removal section shell. The vibrating string grate dust removal section comprises a vibrating string grate dust removal section shell, a vibrating string grate and a ventilation equipment. The vibrating string grate and the ventilation equipment are sequentially arranged in the vibrating string grate dust removal section shell along the direction of airflow advancement in the vibrating string grate dust removal section shell. The application realizes grading treatment of dust through a sectional structure, avoids mixing and accumulation of large particles and small particles, has the advantages of reducing the risk of equipment blockage and prolonging the service life.

Description

Technical Field

[0001] This application relates to the field of dust removal technology, and in particular to a wet dust removal device for mining that classifies dust particles based on their size differences. Background Technology

[0002] Coal, as my country's basic energy source and an important industrial raw material, provides energy security for the country's economic and social development, accounting for more than 70% of primary energy production and consumption. With the high demand for coal energy and the development of rapid full-face tunneling technology, the amount of dust generated at the tunneling face has increased significantly, leading to a sharp rise in explosion accidents and pollution risks. According to underground measurements, the dust concentration at the tunneling face can reach up to 1000 mg / m³. Because tunneling tunnels are often single-ended, and the congestion caused by numerous pieces of equipment within the narrow space makes dust accumulation extremely easy. High concentrations of dust can easily trigger explosions, causing significant economic losses and casualties. At the same time, high concentrations of dust are also a major cause of pneumoconiosis among coal miners, seriously threatening their occupational health and safety. Pneumoconiosis is the most frequently reported occupational disease in my country, accounting for approximately 90% of all reported occupational diseases.

[0003] Existing wet dust collection technologies typically employ a holistic dust collection approach, treating dust particles of different sizes in the dust-laden airflow uniformly. This method results in a large amount of dust being removed from the airflow along the same path, causing dust particles of various sizes (especially large particles) to mix and accumulate. This easily leads to clogging of nozzles and filters, accelerates component aging, and thus shortens the service life of the equipment. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of the prior art and provide a wet dust removal device for mining that classifies dust particles based on their size differences, which has the advantages of reducing the risk of equipment blockage and extending service life.

[0005] To achieve the above objectives, the present invention provides a wet dust collector for mining applications that classifies dust particles based on their size differences, characterized in that it comprises:

[0006] The cyclone dust removal section includes a cyclone dust removal section shell, a cyclone dust removal spray device, and a cyclone impeller. The cyclone dust removal spray device and the cyclone impeller are sequentially arranged inside the cyclone dust removal section shell along the direction of airflow inside the shell. The bottom of the cyclone dust removal section shell is provided with a water inlet and a sewage outlet. The cyclone dust removal spray device is connected to the water inlet, and the sewage outlet is connected to the interior of the cyclone dust removal section shell.

[0007] A vibrating wire grid dust removal section, comprising a vibrating wire grid section housing, a vibrating wire grid, and ventilation equipment, wherein the vibrating wire grid and ventilation equipment are sequentially arranged inside the vibrating wire grid section housing along the direction of airflow inside the housing.

[0008] The device includes a demisting device, which is located at the rear end of the ventilation equipment along the direction of airflow inside the housing of the vibrating wire grid dust removal section, and the demisting device is located inside the housing of the vibrating wire grid dust removal section.

[0009] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The device is characterized in that the blade installation angle of the swirl impeller is 60°, the hub ratio is 0.3, and the number of blades is 10.

[0010] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The device is characterized in that the cyclone dust removal spray device includes a first spray water supply ring and a first nozzle. The first spray water supply ring is circumferentially arranged within the cyclone dust removal section housing. One end of the first nozzle is connected to the first spray water supply ring. The nozzle orifice is arranged along the direction of airflow within the vibrating wire grid dust removal section housing and is used to wet the inner wall of the cyclone dust removal section housing. Multiple first nozzles are arranged sequentially and at intervals on the first spray water supply ring. The water inlet end of the first spray water supply ring is connected to the water inlet.

[0011] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The device is characterized in that the cyclone dust removal section further includes a protective cover, which is disposed at the air inlet of the cyclone dust removal section shell.

[0012] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The device is characterized in that the vibrating wire grid dust removal section further includes a vibrating wire grid spray device. The vibrating wire grid spray device is disposed on the rear side of the vibrating wire grid along the direction of airflow within the housing of the vibrating wire grid dust removal section. The vibrating wire grid spray device includes a second spray water supply ring and a second nozzle. The nozzle of the second spray water supply ring faces the vibrating wire grid. Multiple second nozzles are evenly distributed along the second spray water supply ring.

[0013] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The device is characterized in that the ventilation equipment includes a motor, a motor support, a mixing impeller, and a guide impeller. The motor is fixedly mounted inside the housing of the vibrating wire grid dust removal section via the motor support. The motor has a first motor output end and a second motor output end sequentially arranged along the direction of airflow within the housing of the vibrating wire grid dust removal section. The mixing impeller is mounted on the first motor output end, and the guide impeller is mounted on the second motor output end. The first motor output end is connected to the motor's output shaft for outputting power, and the second motor output end is fixedly connected to the motor's housing to provide a mounting base for the guide impeller.

[0014] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The device is characterized in that the blades of the mixed-flow impeller have an installation angle of 45°, a hub ratio of 0.6, 12 blades, and a blade thickness of 6 mm.

[0015] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences, characterized in that...

[0016] The impeller blades have an installation angle of 30°, a hub ratio of 0.45, 11 blades, and a blade thickness of 4mm.

[0017] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The device is characterized in that the demisting device is a composite baffle demisting grid, which includes trapezoidal grids and hollow tubes disposed between adjacent trapezoidal grids.

[0018] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences, characterized in that a wastewater tank is provided at the bottom of the shell of the vibrating wire grid dust removal section.

[0019] Furthermore, this application also proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences, characterized in that a double-opening side door is installed on the front side of the housing of the vibrating wire grid dust removal section.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. This application provides a wet dust removal device for mining that classifies dust particles based on their size, comprising a cyclone dust removal section, a vibrating wire grid dust removal section, and a demisting device. The segmented structure enables the classification of dust particles, avoiding the mixing and accumulation of large and small particles, and has the advantages of reducing the risk of equipment blockage and extending service life.

[0022] 2. This application provides a wet dust collector for mining applications that classifies dust particles based on their size. It employs a primary dust collector to handle large particles in high-concentration dust, and a secondary dust collector to handle smaller particles in the dust-laden airflow. This achieves graded treatment of dust across a wide range, reducing the workload on the equipment. Graded treatment effectively reduces the likelihood of equipment clogging and the frequency of cleaning.

[0023] 3. The wet dust collector for mining that provides a dust particle size classification treatment uses a high-speed rotating airflow generated by a swirl impeller to separate large dust particles from the dust-laden airflow under centrifugal force. Combined with the wetting effect of the parallel spray system on the inner wall, it increases the adhesion of large dust particles, improves the removal effect of large dust particles, and at the same time reduces equipment wear and extends equipment life.

[0024] 4. The wet dust removal device for mining applications provided in this application for classifying and treating dust particles by size difference is equipped with a vibrating wire grid plate. When the dust-laden airflow after the removal of large particles passes through, the small dust particles in the airflow are captured and removed by the vibrating wire grid plate. The secondary spray system wets the vibrating wire grid plate, improving the capture effect of small dust particles. At the same time, the impact cleans the vibrating wire grid plate, making it less likely for small dust particles to cause blockage.

[0025] 5. This application provides a wet dust collector for mining applications that classifies dust particles based on their size. It utilizes an active mixing impeller to generate a high-speed airflow to power the classification and dust removal process. A guide impeller alters the airflow direction, improving its flow characteristics and providing more favorable conditions for subsequent dehydration. The water-containing airflow passes through a designed composite demister plate, effectively removing droplets from the airflow.

[0026] 6. The wet dust removal device for mining that provides a graded treatment of dust particle size difference is equipped with multi-level functional units and detachable components. The dust removal structures at each level can be assembled as needed. The primary spray system and swirl impeller in the primary large particle dust removal device can also be assembled as needed, providing a flexible selection method. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of a wet dust removal device for mining that performs graded treatment based on differences in dust particle size, provided as an embodiment of this application.

[0028] Figure 2 This is a three-dimensional structural diagram of a mine wet dust collector with a partially cut-off shell, which is provided as an embodiment of this application for classifying dust particle size differences.

[0029] Figure 3This is a three-dimensional structural diagram of the internal components of a wet dust collector for mining applications, designed for classifying dust particle size differences, after removing the shells of the cyclone dust collector section and the vibrating wire grid dust collector section, as provided in this application embodiment.

[0030] Figure 4 This is a three-dimensional half-sectional schematic diagram of the demisting device in a wet dust removal device for mining applications, which is used for classifying dust particle size differences, according to an embodiment of this application.

[0031] Figure 5 This is a half-sectional view of a demisting device in a wet dust collector for mining applications, which is designed for classifying dust particle size differences, according to an embodiment of this application.

[0032] Figure label:

[0033] 100—Swirl dust removal section; 110—Swirl dust removal section shell; 111—Water inlet; 112—Sewage outlet; 120—Swirl dust removal spray device; 121—First spray water supply ring; 122—First nozzle; 130—Swirl impeller; 140—Protective cover;

[0034] 200—Vibrating wire grid dust removal section; 210—Vibrating wire grid dust removal section shell;

[0035] 211—Sewage tank; 212—Side-opening double door; 220—Vibrating wire grate;

[0036] 230—Ventilation equipment; 231—Motor; 232—Motor bracket;

[0037] 233—Mixed-flow impeller; 234—Guide impeller; 240—Vibrating wire grid spray device;

[0038] 241—Second spray water supply ring; 242—Second nozzle;

[0039] 300—Demisting device; 310—Trapezoidal grid plate; 311—Trapezoidal grid plate body;

[0040] 312—First vertical baffle; 313—Second vertical baffle; 320—Hollow tube. Detailed Implementation

[0041] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0042] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] Mining wet dust collectors, designed for classifying dust particles based on size, are devices that capture dust using droplets, liquid films, or bubbles. Among these, the vibrating wire grid dust collector is a type of wet dust collector with a vibrating wire grid as its core component. The vibrating wire grid typically consists of several parallel, tensioned stainless steel wires (diameters from a few tenths to 1 mm) fixed within a steel frame, with a spacing of approximately 1.5 mm between the wires. When dust-laden airflow passes through the vibrating wire grid, the wires vibrate under the influence of the airflow, generating standing waves (sound field). Dust is captured through a multi-layered mechanism involving acoustic agglomeration, inertial collision, interception, and water film adhesion. However, for larger dust particles, the grid can easily clog, increasing grid resistance and damaging the wires, thus shortening the equipment's lifespan.

[0044] In this regard, such as Figure 1-5As shown, this embodiment provides a wet dust removal device for mining applications that classifies dust particles based on their size. It includes a cyclone dust removal section 100, a vibrating wire grid dust removal section 200, and a demisting device 300. The cyclone dust removal section 100 includes a cyclone dust removal section housing 110, a cyclone dust removal spray device 120, and a cyclone impeller 130. The cyclone dust removal spray device 120 and the cyclone impeller 130 are sequentially arranged within the cyclone dust removal section housing 110 along the direction of airflow within the housing. The bottom of the cyclone dust removal section housing 110 is provided with a water inlet 111 and a drain outlet 112. The cyclone dust removal spray device 120 and the... The inlet 111 is connected to the outlet 112, which is connected to the interior of the cyclone dust collector section housing 110. The vibrating wire grid dust collector section 200 includes a vibrating wire grid dust collector section housing 210, a vibrating wire grid 220, and a ventilation device 230. The vibrating wire grid 220 and the ventilation device 230 are sequentially arranged inside the vibrating wire grid dust collector section housing 210 along the direction of airflow inside the housing. The demisting device 300 is arranged at the rear end of the ventilation device 230 along the direction of airflow inside the vibrating wire grid dust collector section housing 210, and the demisting device 300 is located inside the vibrating wire grid dust collector section housing 210.

[0045] For ease of understanding, the following explains some key terms in this embodiment:

[0046] The cyclone dust removal section 100, as part of the overall equipment, is used to treat dust-laden airflow. It uses the centrifugal force generated by the rotation of the airflow to throw the dust onto the wall surface and then wash away the dust with a water film. It can effectively remove larger dust particles in the dust-laden airflow, such as dust particles with a diameter >10μm.

[0047] The vibrating wire grid dust removal section 200, as part of the overall equipment, is used to remove dust from the dust-laden airflow after it has been treated by the cyclone dust removal section 100. It utilizes the self-excited vibration of the vibrating wire grid as the dust-laden airflow passes through it to generate standing waves (sound field). Through a multi-layered dust collection mechanism involving acoustic agglomeration, inertial collision, interception, and water film adhesion, it can effectively remove dust particles with a diameter of 1.5~10μm from the dust-laden airflow.

[0048] The demister 300, as part of the overall equipment, is used to demister the airflow after it has been processed by the vibrating wire grid dust removal section 200. It may employ a baffle demister grid.

[0049] This embodiment of a wet dust collector for mining applications, designed for graded treatment of dust particles based on size differences, divides the dust removal process into two functional zones: a cyclone dust removal section and a vibrating wire grid dust removal section. This achieves graded treatment of the dust-laden airflow, effectively alleviating the problem of easy clogging in single-filter structures. The cyclone dust removal section, through the cooperation of a cyclone dust removal spray device and a cyclone impeller, utilizes the centrifugal force generated by the cyclone to throw large dust particles in the airflow towards the inner wall of the casing and discharge them with the water flow. This pretreatment process reduces the load on subsequent dust removal sections and prevents large dust particles from directly entering the vibrating wire grid dust removal section and causing blockage. The vibrating wire grid dust removal section uses vibrating wire grids to perform secondary interception of the airflow, utilizing vibration characteristics to prevent fine dust from accumulating on the grid surface, thereby maintaining unobstructed airflow and extending the service life of the equipment. Ventilation equipment is installed after the vibrating wire grids, providing power to the entire dust removal system and ensuring that the dust-laden airflow can overcome the resistance of each dust removal structure and pass smoothly.

[0050] This embodiment further proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences. The swirl impeller 130 has a blade installation angle of 60°, a hub ratio of 0.3, and 10 blades.

[0051] To ensure that the 130 swirl impeller generates sufficient dust removal swirl with minimal wind resistance, Fluent numerical simulation was used to optimize the design of the swirl impeller, reducing wind resistance, increasing linear velocity, and achieving good removal of large dust particles.

[0052] Specifically, the blade installation angle of the swirl impeller 130 refers to the angle between the blades of the swirl impeller 130 and the axial direction of the airflow. This angle directly determines the tangential momentum gained by the airflow when passing through the impeller, thus affecting the swirl intensity. Setting the blade installation angle to 60° can impart a suitable rotational intensity to the airflow entering the swirl dust removal section 100, ensuring that the airflow forms a stable swirl field within the swirl dust removal section housing 110.

[0053] The hub ratio of the swirl impeller 130 refers to the ratio of the hub diameter to the outer diameter of the impeller, which affects the impeller's flow area and the airflow distribution in the central region. Setting the hub ratio to 0.3 rationally distributes the impeller's flow area, effectively controlling the velocity distribution in the impeller's central region while ensuring airflow capacity. This avoids flow channel blockage caused by an excessively large hub or unstable central backflow caused by an excessively small hub.

[0054] The number of blades in the swirl impeller 130 refers to the number of blades on the swirl impeller 130, which affects the uniformity of airflow in the impeller circumferential direction and turbulence loss. Setting the number of blades to 10 achieves a uniform blade distribution in the impeller circumferential direction. This blade configuration can effectively smooth the rotational pressure gradient of the airflow and reduce turbulence loss of the airflow on the blade surface.

[0055] Through the above technical solution, this application optimizes the flow field characteristics inside the cyclone dust removal section 100 by precisely defining the key geometric parameters of the cyclone impeller 130, thereby improving the centrifugal separation effect of dust in the dust-laden airflow. Specifically, the blade installation angle of the cyclone impeller 130 is set to 60°, ensuring that the airflow entering the cyclone dust removal section 100 obtains a suitable rotation intensity, ensuring that the airflow forms a stable cyclone field within the shell 110 of the cyclone dust removal section, and promoting the more effective migration of large dust particles to the inner wall of the shell 110 under the action of centrifugal force, achieving efficient pre-dust removal. At the same time, the hub ratio is set to 0.3, which effectively controls the velocity distribution in the central region of the impeller while ensuring the airflow capacity, avoiding channel blockage or unstable central backflow. The number of blades is set to 10, achieving a uniform blade distribution, smoothing the rotational pressure gradient of the airflow, reducing turbulence losses, and ensuring a more uniform distribution of the cyclone field in the radial and axial directions. The synergistic effect of these parameters significantly improves the collection efficiency of large dust particles in the cyclone dust collector section 100, reduces the load on the subsequent vibrating wire grid dust collector section 200, effectively avoids wear and blockage of internal components caused by dust accumulation, extends the service life of the device, and improves the overall operational stability of the dust collector.

[0056] This application further proposes that the cyclone dust removal spray device 120 includes a first spray water supply ring 121 and a first nozzle 122. The first spray water supply ring 121 is arranged circumferentially within the cyclone dust removal section housing 110. One end of the first nozzle 122 is connected to the first spray water supply ring 121. The nozzle orifice of the first nozzle 122 is arranged along the direction of airflow inside the vibrating wire grid dust removal section housing 210 and is used to wet the inner wall of the cyclone dust removal section housing 110. There are multiple first nozzles 122, which are arranged sequentially and spaced apart on the first spray water supply ring 121. The water inlet end of the first spray water supply ring 121 is connected to the water inlet 111.

[0057] Specifically, the cyclone dust removal spray device 120 is a key component in a mine wet dust removal device that classifies dust particles based on their size. In this embodiment, it consists of a first spray water supply ring 121 and a first nozzle 122. The first spray water supply ring 121 is responsible for water distribution, while the first nozzle 122 is responsible for atomizing and spraying the water. The first spray water supply ring 121 is an annular or polygonal pipe arranged circumferentially around the shell 110 of the cyclone dust removal section, i.e., surrounding the inside of the shell, providing a uniform water distribution inside the shell, thus constructing a circumferential spray wetting system. This circumferential arrangement ensures that the water mist can cover the inside of the shell from multiple directions. For example, a circular pipe can be used, fixed inside the shell by a fixing connector. The first nozzle 122 is the core component for realizing water mist spraying. One end of it is connected to the first spray water supply ring 121 to receive the water flow from the water supply ring.

[0058] Furthermore, the nozzle direction of the first nozzle 122 is crucial for achieving a specific wetting effect. It is positioned along the direction of airflow within the housing 210 of the vibrating wire grid dust removal section, aiming to ensure that the sprayed water mist effectively covers and wets the inner wall of the cyclone dust removal section 100, following the airflow direction. This arrangement ensures that the water mist, driven by the airflow, forms a continuous water film on the inner wall of the cyclone dust removal section 100, effectively capturing dust adhering to the wall surface. To achieve comprehensive and uniform wetting of the inner wall of the cyclone dust removal section housing 110, multiple first nozzles 122 are arranged and spaced sequentially on the first spray water supply ring 121. By rationally designing the number and spacing of the nozzles, wetting blind spots or over-wetting areas can be avoided, ensuring that an effective wetted layer is formed on the entire inner wall surface. For example, the nozzles can be evenly distributed around the circumference of the water supply ring according to the housing diameter and the required wetting range, or a non-uniform spacing can be used according to the airflow characteristics and dust distribution. Furthermore, the water inlet of the first spray water supply ring 121 is connected to the water inlet 111, ensuring a continuous and stable water supply for the entire spray system. The water inlet 111 is typically connected to an external water supply system to provide the necessary water for the operation of the mine wet dust collector, which classifies dust particles based on their size. This direct connection simplifies the water circuit design, reduces intermediate steps, and helps ensure the stability of water pressure and flow rate.

[0059] Through the above technical solution, the cyclone dust removal spray device 120 constructs a surrounding spray wetting system through a circumferentially arranged first spray water supply ring 121 and multiple spaced first nozzles 122. The nozzles 122 are positioned along the airflow direction and are specifically designed to wet the inner wall of the cyclone dust removal section housing 110. Under the action of the cyclone impeller 130, the airflow carrying dust impacts the water film on the inner wall, and the dust is captured by the water film. Under the action of gravity, the captured dust is carried by the water flow and discharged along the inner wall through the drain port 112. The spaced arrangement of the multiple first nozzles 122 ensures uniform wetting, avoids the occurrence of local dry areas, and effectively suppresses secondary dust re-entrainment and accumulation. At the same time, the direct connection between the first spray water supply ring 121 and the water inlet 111 ensures that the spray device can obtain a continuous and stable water supply, further improving the self-cleaning ability and operational stability of the dust removal device, effectively solving the problems of dust accumulation, secondary pollution, and cleaning difficulties on the inner wall of the housing, and extending the service life of the equipment.

[0060] This application further proposes that the cyclone dust removal section 100 also includes a protective cover 140, which is disposed at the air inlet of the cyclone dust removal section housing 110.

[0061] Specifically, the protective cover 140 is a metal mesh structure, which is installed at the air inlet of the cyclone dust collector section shell 110, completely covering the air inlet. The metal mesh can be made of woven or welded stainless steel wire. The protective cover 140 is fixed to the air inlet of the cyclone dust collector section shell 110 by bolts or clips.

[0062] The protective cover 140 can prevent large pieces of coal and other impurities from entering the dust removal device and causing damage to the device.

[0063] This application further proposes that the vibrating wire grid dust removal section 200 also includes a vibrating wire grid spray device 240. The vibrating wire grid spray device 240 is arranged on the rear side of the vibrating wire grid 220 along the direction of airflow inside the housing 210 of the vibrating wire grid dust removal section. The vibrating wire grid spray device 240 includes a second spray water supply ring 241 and a second nozzle 242. The nozzle of the second spray water supply ring 241 faces the vibrating wire grid 220. There are multiple second nozzles 242, and the multiple second nozzles 242 are evenly distributed on the second spray water supply ring 241.

[0064] Specifically, the vibrating wire grid spray device 240 is designed to spray liquid onto the vibrating wire grid 220. It can be implemented in various forms; for example, it can be a fine atomization system driven by a high-pressure pump, producing a fine water mist by pressurizing water and delivering it to nozzles; or it can be a low-pressure spray system, relying on gravity or a lower water supply pressure to form water droplets or streams through nozzles. The device can be designed as a modular unit integrated into a piping system or as a stand-alone component. The installation position of the vibrating wire grid spray device 240 is limited to the downstream side of the vibrating wire grid 220, i.e., after the airflow has passed through the vibrating wire grid 220. This arrangement ensures that the spray can effectively act on the surface of the vibrating wire grid 220. Specifically, the device can be securely installed on the inner wall of the vibrating wire grid dust removal section housing 210 using brackets or fasteners through welding, bolting, or snap-fitting, ensuring that its spray direction covers the vibrating wire grid 220.

[0065] The second spray water supply ring 241 is a ring-shaped or near-ring-shaped pipe structure whose main function is to receive water from the outside and distribute it evenly to multiple second nozzles 242. This water supply ring can be made of corrosion-resistant metal materials (such as stainless steel) or high-strength plastics, and its diameter and wall thickness should be sufficient to withstand the system water supply pressure and ensure that the water flow remains stable and uniform throughout the water supply ring. The water supply ring is typically connected to the main water supply pipeline via flanges, threaded joints, or quick couplings. The second nozzles 242 are components used to disperse the water flow into specific shapes (such as mist, fan-shaped, or conical) or droplet sizes. The types of second nozzles 242 are diverse; for example, impact nozzles with good atomization effects can be selected to produce a fine water mist; fan-shaped nozzles can be selected to provide a wide coverage area; or solid conical nozzles can be selected to achieve a stronger scouring effect. The nozzles are typically made of wear-resistant and corrosion-resistant materials, such as stainless steel, ceramics, or special engineering plastics, to adapt to wet dust removal environments.

[0066] The nozzle 242 faces the vibrating wire grid plate 220, which clearly defines the spray direction of the second nozzle 242, meaning the sprayed water stream or mist is directly directed towards the vibrating wire grid plate 220. This directional spraying aims to ensure that water can effectively wet or wash the surface of the vibrating wire grid plate 220. The nozzle can be installed at a fixed angle, so that its spray axis forms a specific angle with the surface of the vibrating wire grid plate 220 to optimize the wetting or cleaning effect; it can also be designed with an adjustable angle structure to flexibly adjust the spray direction and coverage area under different working conditions. Multiple second nozzles 242 are evenly distributed along the second spray water supply ring 241. This arrangement aims to ensure that the entire surface of the vibrating wire grid plate 220 is uniformly sprayed. By installing multiple second nozzles 242 at equal intervals on the second spray water supply ring 241, spray blind spots or localized dry areas can be avoided. In addition, depending on the specific geometry and size of the vibrating wire grid plate 220, a non-equal spacing arrangement that still achieves comprehensive and uniform coverage can also be adopted.

[0067] Through the above technical solution, in the vibrating wire grid dust removal section 200, the vibrating wire grid spray device 240 is cleverly positioned on the rear side of the vibrating wire grid 220, with the nozzles of its second nozzles 242 facing the vibrating wire grid 220. This configuration allows the vibrating wire grid 220 to be continuously or intermittently sprayed and wetted, thereby forming a water film on its surface. This water film significantly enhances the vibrating wire grid 220's ability to capture fine dust particles, as a wet surface more easily adsorbs and adheres to dust. Simultaneously, the scouring effect of the spray effectively prevents dust from drying and accumulating on the surface of the vibrating wire grid 220, avoiding grid blockage caused by dust accumulation, thus maintaining the unobstructed flow of the vibrating wire grid 220 and ensuring the stability and durability of dust removal efficiency. The uniform arrangement of multiple second nozzles 242 along the second spray water supply ring 241 further ensures the comprehensiveness and uniformity of the spray, eliminating the potential for insufficient local cleaning. In view of this, the solution not only improves the dust removal performance of the vibrating wire grid dust removal section 200, but also extends the service life of the vibrating wire grid 220, reduces the maintenance frequency and cost, and effectively reduces the risk of secondary dust generation, making the entire mine wet dust removal device for classifying and treating dust particle size differences more efficient and stable in operation.

[0068] This application further proposes a wet dust removal device for mining applications that classifies dust particles based on their size. The ventilation equipment 230 includes a motor 231, a motor bracket 232, a mixing impeller 233, and a guide impeller 234. The motor 231 is fixedly mounted inside the vibrating wire grid dust removal section housing 210 via the motor bracket 232. The motor 231 has a first motor output end and a second motor output end sequentially arranged along the direction of airflow inside the vibrating wire grid dust removal section housing 210. The mixing impeller 233 is mounted on the first motor output end, and the guide impeller 234 is mounted on the second motor output end. The first motor output end is connected to the motor's output shaft for power output; the second motor output end is fixedly connected to the motor's housing for providing a mounting base for the guide impeller 234.

[0069] Specifically, as the core power source of the ventilation equipment 230, the motor 231 is responsible for providing the mechanical energy required to drive the mixed-flow impeller 233 to rotate. It uses an explosion-proof motor, and a soundproof protective shell can be installed on the outside of the motor. This shell protects the motor from corrosion by dust, dust-laden droplets, and water mist, effectively improving the motor's service life and reducing noise. The soundproof protective shell can be a structure with sound-insulating material inside a metal shell to achieve both corrosion resistance and sound insulation. The motor bracket 232 is used to securely install the motor 231 inside the vibrating wire grid dust collector section housing 210. It can be connected to the housing by welding to ensure structural strength, or by bolts for easy disassembly and maintenance. The mixed-flow impeller 233 is an impeller that combines the characteristics of axial and centrifugal fans. Its blade design allows for both axial and radial flow of air as it passes through. Its main function is to efficiently provide initial pressurization to the airflow and generate a large air volume.

[0070] The blades of the mixing impeller 233 can adopt different shapes, such as curved blades or straight blades, to adapt to different flow and pressure requirements; the material can be wear-resistant and corrosion-resistant, such as stainless steel or composite materials. The guide impeller 234 is located downstream of the mixing impeller 233. Its main function is to further pressurize the airflow and rectify the rotating airflow generated by the mixing impeller 233, making it axial flow, thereby improving the stability and efficiency of the airflow and converting some dynamic pressure into static pressure. The blades of the guide impeller 234 can be designed as fixed or adjustable to optimize airflow characteristics; its material also needs to consider wear resistance and corrosion resistance. The motor 231 is fixedly installed inside the vibrating wire grid dust collector section housing 210 via the motor bracket 232. This installation method ensures the stability and reliability of the ventilation equipment 230 inside the vibrating wire grid dust collector section housing 210, avoiding displacement or damage caused by vibration or airflow impact, thus ensuring the normal operation of the entire dust collection device. The motor 231 has a first motor output end and a second motor output end arranged sequentially along the direction of airflow inside the dust removal section housing 210 of the vibrating wire grid plate. The first motor output end is connected to the output shaft of the motor and is used to output power. The second motor output end is fixedly connected to the housing of the motor and is used to provide an installation foundation for the guide impeller 234. This specific installation configuration allows the mixing impeller 233 to first process the airflow, providing basic flow and pressure. Subsequently, the guide impeller 234 performs secondary processing on the airflow passing through the mixing impeller 233, further increasing the pressure and rectifying the airflow to form a highly efficient and stable ventilation effect.

[0071] Through the above technical solution, the mine wet dust removal device for dust particle size classification in this application introduces a structurally optimized ventilation device 230 in the vibrating wire grid dust removal section 200. This ventilation device 230 uses a motor 231 fixedly installed inside the housing 210 of the vibrating wire grid dust removal section via a motor bracket 232.

[0072] Innovatively, a mixed-flow impeller 233 first efficiently pressurizes and increases the flow rate of the dust-laden airflow, ensuring smooth passage through the vibrating wire grid plate 220. Subsequently, a guide impeller 234 further pressurizes and rectifies the airflow after passing through the mixed-flow impeller 233, effectively converting the rotational component of the airflow into axial kinetic energy and static pressure. This significantly improves the stability and uniformity of the airflow and further enhances the overall efficiency of the ventilation equipment. This series-connected and coordinated impeller configuration not only provides stable and sufficient power to ensure efficient passage of the dust-laden airflow through the vibrating wire grid plate dust removal section 200, promoting full contact between dust and water mist, but also reduces airflow turbulence and energy loss by optimizing airflow organization, thus lowering energy consumption. Simultaneously, the stable airflow helps reduce impact and wear on the vibrating wire grid plate 220 and other internal components, extending the equipment's service life. This effectively solves the problems of insufficient efficiency, high energy consumption, and easy wear of traditional ventilation equipment under harsh operating conditions, thereby improving the dust removal efficiency and operational reliability of the entire mine wet dust removal device for classifying dust particle size differences.

[0073] This application further proposes that the blade installation angle of the mixed flow impeller 233 is 45°, the hub ratio is 0.6, the number of blades is 12, and the blade thickness is 6mm.

[0074] Specifically, the blade installation angle of the mixed-flow impeller 233 refers to the angle between the blade chord and the impeller's plane of rotation, which directly affects the impeller's efficiency in doing work on the airflow and the velocity field distribution of the airflow after passing through the impeller. The 45° blade installation angle was selected through Fluent numerical simulation optimization to balance airflow and air pressure, resulting in better overall performance.

[0075] The hub ratio of the mixed-flow impeller 233 refers to the ratio of the impeller hub diameter to the impeller outer diameter. It affects the impeller's flow channel area, the flow characteristics of the airflow inside the impeller, and the impeller's efficiency. A hub ratio of 0.6 helps optimize the airflow distribution at the blade roots, reduce backflow, and thus improve the overall efficiency and stability of the impeller. This hub ratio can be fixed by determining the hub and blade dimensions during impeller design based on the required fluid characteristics and structural strength, or it can be achieved by selecting different combinations of hub and blade sizes.

[0076] The mixed-flow impeller 233 has 12 blades. The number of blades affects the impeller's work capacity, airflow uniformity, noise, and manufacturing cost and weight. The 12-blade design ensures sufficient airflow guidance and energy transfer while avoiding excessive blades that could lead to channel blockage and increased friction loss, thus contributing to efficient and stable airflow delivery. The number of blades can be determined during the impeller design phase based on calculations and optimizations of required performance parameters (such as airflow, air pressure, efficiency, and noise) and structural strength. Prefabricated blades are then fixed to the hub using methods such as casting, welding, or riveting. During the design process, the number of blades in the guide impeller 234 must also be considered to ensure that the number of blades in the guide impeller 234 is coprime with the number of blades in the mixed-flow impeller 233. This reduces pressure pulsation on the blade surface, and the spiral-shaped airflow is redirected axially after passing through the guide impeller, providing favorable conditions for subsequent dehydration and improving the dehydration effect.

[0077] The blades of the mixed-flow impeller 233 have a thickness of 6 mm. Blade thickness affects the structural strength, stiffness, aerodynamic performance (such as drag and noise), as well as the weight and manufacturing cost of the impeller. In mine wet dust collectors that classify dust particles based on their size, the blades need to withstand the impact and wear of the dust-laden airflow. A thickness of 6 mm provides sufficient structural strength and wear resistance to ensure the impeller's long-term stable operation under harsh conditions, while avoiding excessive thickness that would lead to decreased aerodynamic performance and increased weight.

[0078] By precisely setting the blade installation angle, hub ratio, number of blades, and blade thickness of the mixed-flow impeller 233, this application optimizes the aerodynamic performance of the mixed-flow impeller 233. Specifically, the 45° blade installation angle provides sufficient airflow while ensuring high wind pressure, effectively driving the dust-laden airflow through the vibrating wire grid plate 220. The hub ratio of 0.6 helps improve the airflow distribution at the blade root and reduces backflow. The 12-blade design provides sufficient working surface while avoiding flow channel blockage and friction loss. The 6mm blade thickness ensures the structural strength and wear resistance of the impeller in dusty environments. The synergistic effect of these parameters enables the mixed-flow impeller 233 to generate a more stable and uniform airflow, significantly improving the flow field distribution inside the vibrating wire grid plate dust removal section 200, effectively avoiding airflow turbulence, eddies, and dead zones, thereby improving dust removal efficiency and reducing excessive dust accumulation in local areas. This, in turn, reduces the risk of filter element blockage and wear, and extends the service life of the equipment.

[0079] This application further proposes that the guide impeller 234 has a blade mounting angle of 30°, a hub ratio of 0.45, a number of blades of 11, and a blade thickness of 4 mm.

[0080] Specifically, the blade installation angle of the guide impeller 234 is 30°, which is the angle between the blade chord and the impeller's plane of rotation. Its main function is to guide and correct the airflow direction. By setting the blade installation angle to 30°, the guide impeller 234 can effectively rectify the airflow with a rotational component after passing through the mixing impeller 233, maximizing its axial component, and converting the kinetic energy of the airflow into static pressure energy, thereby improving the static pressure efficiency of the ventilation equipment 230.

[0081] The hub ratio of the guide impeller 234 is 0.45. This parameter is defined as the ratio of the impeller hub diameter to the blade outer diameter, and it affects the uniformity of airflow distribution in the impeller radial direction and the structural strength of the impeller. A hub ratio of 0.45 provides sufficient flow area for the airflow while ensuring the structural stability of the guide impeller 234. This results in a more uniform radial velocity distribution of the airflow as it passes through the guide impeller 234, reducing potential flow field separation or turbulence in the hub region. In other embodiments, the hub ratio can be set to, for example, 0.4 to provide a larger flow area, or 0.5 to enhance the structural strength of the hub region, depending on specific design requirements.

[0082] The guide impeller 234 has 11 blades. The number of blades is a crucial factor affecting the uniformity of the work done by the impeller on the airflow and the flow field pulsation. The 11-blade design effectively reduces mutual interference between the blades and the airflow while ensuring airflow rectification, thus minimizing airflow pulsation and resulting in a smoother airflow after leaving the guide impeller 234. Furthermore, a suitable number of blades helps balance manufacturing complexity and maintenance costs. In other embodiments, the number of blades can be set to, for example, 10 to further reduce manufacturing costs, or 12 to provide more precise airflow control, depending on specific needs.

[0083] The blade thickness of the guide impeller 234 is 4 mm. Blade thickness is a key parameter determining the blade's structural rigidity, wear resistance, and aerodynamic performance. Setting the blade thickness to 4 mm aims to provide the guide impeller 234 with sufficient mechanical strength to resist the scouring and wear of high-speed dust-laden airflow, thereby extending its service life. Simultaneously, this thickness also considers aerodynamic performance, avoiding excessive flow resistance due to excessively thick blades. In other embodiments, the blade thickness can also be set to, for example, 3 mm to optimize aerodynamic performance, or 5 mm to further enhance wear resistance, depending on material properties and the expected wear level.

[0084] Through the above technical solution, the blade installation angle, hub ratio, number of blades, and blade thickness of the guide impeller 234 are precisely optimized, enabling the guide impeller 234 to efficiently rectify the rotating airflow generated by the mixing impeller 233, effectively converting the kinetic energy of the airflow into static pressure energy, thereby significantly improving the overall static pressure efficiency of the ventilation equipment 230. This optimized design effectively avoids secondary eddies and unnecessary pressure losses when the airflow passes through the guide impeller 234, ensuring the stability and uniformity of the airflow and providing an ideal flow field environment for the subsequent dust removal process. At the same time, the reasonable blade thickness enhances the wear resistance of the guide impeller 234 in dusty environments, effectively extending the service life of the equipment and reducing maintenance costs. The synergistic effect of these parameters not only solves the problems of low airflow rectification efficiency, high energy consumption, and rapid component wear caused by unreasonable structural parameters of the guide impeller 234, but also ensures that the mine wet dust collector for classifying dust particles by size can maintain efficient, stable, and long-term operation when handling high-concentration dust.

[0085] This application further proposes that the demisting device 300 is a composite deflector demisting grid plate, which includes a trapezoidal grid plate 310 and a hollow tube 320 disposed between adjacent trapezoidal grid plates 310.

[0086] Specifically, the composite deflector grid plate is a highly efficient gas-liquid separation device that separates liquid droplets (mist droplets) entrained in the airflow from the gas by changing the airflow direction and utilizing principles such as inertial collision and gravity settling.

[0087] The trapezoidal grid plate 310 is one of the core components of the composite deflector grid plate. Its special shape (trapezoidal) is designed to optimize the airflow deflection path and increase the contact area between the airflow and the grid plate surface, thereby improving the droplet capture efficiency. When the airflow passes through the trapezoidal grid plate 310, it undergoes multiple directional changes, causing the droplets to impact the grid plate surface due to inertia and coalesce into a liquid film. The trapezoidal grid plate 310 can be made of corrosion-resistant materials such as plastics (e.g., polypropylene, polyvinyl chloride) or metals (e.g., stainless steel) to adapt to the humid and potentially corrosive environment inside the wet dust collector for mining applications that classifies dust particles based on their size. Furthermore, the tilt angle and spacing of the trapezoidal grid plate 310 can be optimized according to the expected airflow velocity and droplet size distribution to reduce airflow resistance while ensuring demisting efficiency.

[0088] In this embodiment, the trapezoidal grid plate 310 includes a trapezoidal grid plate body 311, a first vertical baffle 312, and a second vertical baffle 313. The length directions of both the first vertical baffle 312 and the second vertical baffle 313 are along the length direction of the trapezoidal grid plate body 311. The first vertical baffle 312 is vertically disposed above the rising section of the trapezoidal grid plate body 311, and its lower end is fixedly connected to the trapezoidal grid plate body 311. The rising section is located near the airflow inlet direction of the demister 300. The second vertical baffle 313 is vertically disposed below the descending section of the trapezoidal grid plate body 311, and its upper end is fixedly connected to the trapezoidal grid plate body 311. The descending section is located near the airflow outlet direction of the demister 300.

[0089] The hollow tube 320 is disposed between adjacent trapezoidal grid plates 310, and its main function is to improve the water mist removal effect. Through two vertical baffles and three hollow tubes, the airflow characteristics inside the demisting device 300 are changed, forming a pressurized area above the baffles and a depressurized turbulent area behind the baffles. The pressurized side enhances the inertial impact effect of the droplets, while the low-pressure turbulent side causes tiny droplets to collide and condense, further improving the water mist removal effect.

[0090] Meanwhile, the hollow tube 320 can also support and fix the adjacent trapezoidal grid plate 310 to a certain extent, enhancing the overall structural stability of the demister. The hollow tube 320 can be made of the same material as the trapezoidal grid plate 310, such as corrosion-resistant plastic or stainless steel, to ensure material compatibility and durability. The cross-sectional shape of the hollow tube 320 can be circular, square, or elliptical, and its size and arrangement can be designed according to the droplet flow rate and drainage requirements to ensure that the droplets can be discharged quickly and prevent clogging.

[0091] Through the above technical solution, the demisting device 300 is designed as a composite baffle demisting grid, specifically employing a trapezoidal grid 310 and a hollow tube 320 disposed between adjacent trapezoidal grids 310, which significantly improves demisting efficiency. The unique geometry of the trapezoidal grid 310 and the two vertical baffles causes the airflow to undergo multiple turns during passage, increasing the collision opportunities between droplets and the grid surface, thereby effectively capturing fine droplets. Furthermore, it effectively prevents water mist from entering downstream equipment or being emitted into the environment with the airflow, protecting downstream equipment from corrosion and damage, and ensuring the cleanliness of the emitted gas, thus improving the overall performance and operational stability of the entire mine wet dust collector designed for the graded treatment of dust particle size differences.

[0092] This application further proposes a wet dust removal device for mining applications that classifies dust particles based on their size differences, wherein a wastewater tank 211 is provided at the bottom of the housing 210 of the vibrating wire grid dust removal section.

[0093] Specifically, the wastewater tank 211 is a structure used to collect and guide wastewater. The wastewater tank 211 typically refers to a container or channel located at the bottom of the equipment to collect liquids (such as dust-laden wastewater) and guide them to the discharge outlet. Its main function is to prevent the disorderly accumulation of liquid inside the equipment, keep the equipment clean, and facilitate centralized wastewater treatment. In practical applications, the wastewater tank 211 can be designed as a groove structure integrally formed with the bottom of the vibrating wire grid dust collector section housing 210, with a certain slope at the bottom to allow wastewater to flow to the pre-set drain outlet under gravity. This integrated design reduces connection gaps, lowers the risk of leakage, and enhances the overall structural integrity. Alternatively, the wastewater tank 211 can also be an additional structure manufactured separately and installed at the bottom of the vibrating wire grid dust collector section housing 210, for example, by welding, bolting, or sealing. This method facilitates modular production and installation, and allows for easy disassembly for maintenance or replacement when needed. Wastewater tanks are typically made of corrosion-resistant materials, such as stainless steel, acid and alkali resistant plastics, or carbon steel coated with an anti-corrosion layer, to adapt to the corrosive environment of dusty wastewater.

[0094] Through the above technical solution, a wastewater tank 211 is installed at the bottom of the housing 210 of the vibrating wire grid dust removal section. This effectively collects the dust-laden wastewater generated during the dust removal process of the vibrating wire grid dust removal section 200 and guides it to a pre-set discharge port. This design avoids the disorderly accumulation of wastewater at the bottom of the housing, thereby significantly reducing the risk of internal dampness and corrosion and extending the service life of the equipment. At the same time, centralized collection and discharge of wastewater helps to maintain the cleanliness and dryness of the internal environment of the vibrating wire grid dust removal section 200, reduces the interference of wastewater on airflow, effectively avoids secondary dust generation, and thus maintains and improves dust removal efficiency. In addition, the wastewater tank 211 greatly simplifies the daily cleaning and maintenance of the equipment, ensuring that all components of the entire mine wet dust removal device for classifying dust particle size differences, including the cyclone dust removal section 100 and the demister 300, can operate stably and efficiently.

[0095] This application further proposes a wet dust removal device for mining that is designed for classifying dust particle size differences, wherein a double-opening side door 212 is installed on the front side of the housing 210 of the vibrating wire grid dust removal section.

[0096] The double-leaf side-opening door 212 is a door structure consisting of two door panels that can open to both sides. It is typically connected to the vibrating wire grid dust collector section housing 210 via hinges or sliding rails and is equipped with a locking mechanism to ensure sealing and safety during equipment operation. Specifically, the double-leaf side-opening door 212 can be opened by rotating it outwards or inwards using hinges installed on one side of the door panels. The door panels are sealed together with a sealing strip and secured with latches, bolts, or quick-locking mechanisms. This design is simple, offers a large opening angle, and facilitates personnel access and tool operation. Alternatively, the double-leaf side-opening door 212 can also employ a sliding rail structure, allowing the two door panels to slide open along the sides of the vibrating wire grid dust collector section housing 210. This method is suitable for space-constrained situations or scenarios where the door panels do not occupy any external space. The door panels also require sealing strips and locking mechanisms. The main function of the double-opening side door 212 is to provide a spacious and convenient passage for inspecting, cleaning, maintaining and replacing the components inside the vibrating wire grid dust removal section 200.

[0097] Through the above technical solution, a double-opening side door 212 is installed on the front side of the housing 210 of the vibrating wire grid dust removal section, greatly facilitating the internal maintenance of the equipment. The design of the double-opening side door 212 allows operators to quickly and conveniently enter the internal space of the vibrating wire grid dust removal section 200 without extensive disassembly of the entire dust removal device. This not only facilitates the daily inspection, cleaning, and maintenance of core components such as the vibrating wire grid 220 and ventilation equipment 230, but also significantly shortens the time required for troubleshooting and component replacement. By providing a direct and spacious maintenance passage, the difficulty and labor intensity of maintenance are effectively reduced, the operational reliability and maintainability of the equipment are improved, thereby extending the service life of the equipment and reducing overall operating costs.

[0098] The following example will provide a more detailed explanation of the above technical solution:

[0099] Consider an underground coal mine tunneling face where high-concentration dust-laden airflow is generated during operations. To effectively purify the air, protect the health of workers, and avoid safety hazards caused by dust accumulation, a mine-graded wet dust collector is deployed here, designed to classify and process dust particles based on their size.

[0100] The device first performs preliminary treatment on the dust-laden airflow through a cyclone dust removal section 100. The dust-laden airflow enters the cyclone dust removal section housing 110. At the air inlet, a protective cover 140 blocks larger debris from entering, protecting the internal components. A cyclone dust removal spray device 120 receives clean water through a water inlet 111. The cyclone dust removal spray device 120 includes a first spray water supply ring 121 arranged circumferentially along the cyclone dust removal section housing 110, and a plurality of first nozzles 122 arranged sequentially at intervals on the first spray water supply ring 121. The nozzles 122 are positioned along the airflow direction, spraying water mist onto the inner wall of the cyclone dust removal section housing 110 to keep the inner wall moist. Subsequently, the airflow passes through a cyclone impeller 130. The cyclone impeller 130 has a blade installation angle of 60°, a hub ratio of 0.3, and 10 blades, its function being to impart strong rotational motion to the airflow, forming a high-speed cyclone. Under centrifugal force, large dust particles in the airflow are thrown towards the inner wall of the cyclone dust collector section shell 110, which has been moistened by water mist. They combine with the water film to form dust-laden water droplets, which flow downwards along the inner wall and are finally discharged through the drain port 112. This stage achieves highly efficient pre-separation of large dust particles. Unlike existing technologies that mix dust of all particle sizes, this device separates and discharges large dust particles in the initial stage, effectively preventing them from entering subsequent dust collection stages, significantly reducing the risk of clogging of subsequent components, and extending the service life of the equipment.

[0101] After passing through the cyclone dust removal section 100, most of the large dust particles have been removed from the airflow, leaving mainly medium and small-sized dust particles. The airflow then enters the vibrating wire grid dust removal section housing 210 of the vibrating wire grid dust removal section 200. The vibrating wire grid dust removal section 200 also includes a vibrating wire grid spray device 240, which is located behind the vibrating wire grid 220. The vibrating wire grid spray device 240 includes a second spray water supply ring 241 and multiple second nozzles 242 evenly distributed along the second spray water supply ring 241. The nozzles 242 face the vibrating wire grid 220, continuously spraying water mist onto the vibrating wire grid 220 to keep it moist. When the airflow passes through the moistened vibrating wire grid 220, the medium and small-sized dust particles come into full contact with the water film and are captured through mechanisms such as inertial collision, interception, and diffusion. The captured dust particles combine with water to form dust-laden water droplets, which fall into the wastewater tank 211 at the bottom of the vibrating wire grid dust collector section housing 210 under gravity and are discharged through the drain port. A ventilation device 230 is installed after the vibrating wire grid 220 to provide airflow power. The ventilation device 230 includes a motor 231, a motor bracket 232, a mixing impeller 233, and a guide impeller 234. The motor 231 is fixedly installed inside the vibrating wire grid dust collector section housing 210 via the motor bracket 232. The mixing impeller 233 is installed on the first motor output end of the motor 231, with a blade installation angle of 45°, a hub ratio of 0.6, 12 blades, and a blade thickness of 6 mm. The guide impeller 234 is installed on the second motor output end of the motor 231, with a blade installation angle of 30°, a hub ratio of 0.45, 11 blades, and a blade thickness of 4 mm. The mixing impeller 233 and the guide impeller 234 work together to efficiently draw airflow through the vibrating wire grid plate 220 and provide a stable airflow for subsequent demisting. A double-opening side door 212 is installed on the front of the vibrating wire grid plate dust removal section housing 210, facilitating inspection and maintenance of the vibrating wire grid plate 220 and the vibrating wire grid plate spray device 240. The vibrating wire grid plate dust removal section 200 focuses on treating medium and small-diameter dust particles after pre-dust removal, avoiding clogging problems caused by mixing with large dust particles. This graded treatment method allows the vibrating wire grid plate 220 to focus more on its designed function, improving the collection efficiency of fine dust while reducing wear and aging, and extending the service life of the vibrating wire grid plate 220 and related components.

[0102] Finally, the airflow after being processed by the vibrating wire grid dust removal section 200 has a significantly reduced dust content, but still contains a large amount of water mist. This airflow then enters the demister 300, which is located at the rear end of the ventilation equipment 230 and inside the housing 210 of the vibrating wire grid dust removal section. The demister 300 is a composite baffle demister, including trapezoidal grids 310 and hollow tubes 320 disposed between adjacent trapezoidal grids 310. When the misty airflow passes through the composite baffle demister, the airflow is forced to change direction multiple times. Water mist particles in the airflow collide with the surfaces of the trapezoidal grids 310 and the hollow tubes 320 due to inertia, agglomerate into larger water droplets, slide off the grid surface under gravity, and finally collect and discharge.

[0103] This three-stage wet dust collector for mining applications, designed for classifying dust particles based on their size, utilizes a cyclone dust collector (100) to efficiently remove large dust particles, a vibrating wire grid dust collector (200) to finely capture small dust particles, and finally, a demisting device (300) to thoroughly remove water mist, ensuring the cleanliness of the exhaust gas. The entire process avoids the mixing and accumulation of dust particles of different sizes, fundamentally solving the problems of nozzle and filter clogging, component aging, and short equipment lifespan in existing technologies. The coordinated operation of each functional stage significantly improves operational stability and reliability while maintaining high dust removal efficiency and reducing maintenance costs.

[0104] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A mine dust removal device for dust particle size difference classification treatment, characterized in that, include: A cyclone dust removal section (100) includes a cyclone dust removal section shell (110), a cyclone dust removal spray device (120), and a cyclone impeller (130). The cyclone dust removal spray device (120) and the cyclone impeller (130) are arranged sequentially inside the cyclone dust removal section shell (110) along the direction of airflow inside the cyclone dust removal section shell (110). The bottom of the cyclone dust removal section shell (110) is provided with a water inlet (111) and a sewage outlet (112). The cyclone dust removal spray device (120) is connected to the water inlet (111), and the sewage outlet (112) is connected to the interior of the cyclone dust removal section shell (110). The vibrating wire grid dust removal section (200) includes a vibrating wire grid dust removal section housing (210), a vibrating wire grid (220), and a ventilation device (230). The vibrating wire grid (220) and the ventilation device (230) are arranged sequentially inside the vibrating wire grid dust removal section housing (210) along the direction of airflow inside the housing (210). The demisting device (300) is arranged at the rear end of the ventilation equipment (230) along the direction of airflow inside the dust removal section housing (210) of the vibrating wire grid plate, and the demisting device (300) is located inside the dust removal section housing (210) of the vibrating wire grid plate.

2. The mine-used wet dust removal device for grading treatment according to particle size difference of dust according to claim 1, characterized in that, The blade installation angle of the swirl impeller (130) is 60°, the hub ratio is 0.3, and the number of blades is 10.

3. The mine-used wet dust removal device for grading treatment according to particle size difference of dust according to claim 1, characterized in that, The cyclone dust removal spray device (120) includes a first spray water supply ring (121) and a first nozzle (122). The first spray water supply ring (121) is arranged circumferentially inside the cyclone dust removal section housing (110). One end of the first nozzle (122) is connected to the first spray water supply ring (121). The nozzle (122) is arranged along the direction of airflow inside the vibrating wire grid dust removal section housing (210) and is used to wet the inner wall of the cyclone dust removal section housing (110). There are multiple first nozzles (122). Multiple first nozzles (122) are arranged sequentially and spaced on the first spray water supply ring (121). The water inlet end of the first spray water supply ring (121) is connected to the water inlet (111).

4. The mine-used wet dust removal device for grading treatment according to particle size difference of dust according to claim 1, characterized in that, The vibrating wire grid dust removal section (200) also includes a vibrating wire grid spray device (240). The vibrating wire grid spray device (240) is arranged on the rear side of the vibrating wire grid (220) along the direction of airflow inside the housing (210) of the vibrating wire grid dust removal section. The vibrating wire grid spray device (240) includes a second spray water supply ring (241) and a second nozzle (242). The nozzle of the second spray water supply ring (241) faces the vibrating wire grid (220). There are multiple second nozzles (242). Multiple second nozzles (242) are evenly distributed on the second spray water supply ring (241) along the second spray water supply ring (241).

5. The mine-used wet dust removal device for grading treatment according to particle size difference of dust according to claim 1, characterized in that, The ventilation equipment (230) includes a motor (231), a motor bracket (232), a mixed-flow impeller (233), and a guide impeller (234). The motor (231) is fixedly installed inside the vibrating wire grid dust removal section housing (210) through the motor bracket (232). The motor (231) has a first motor output end and a second motor output end arranged sequentially along the direction of airflow inside the vibrating wire grid dust removal section housing (210). The mixed-flow impeller (233) is installed on the first motor output end, and the guide impeller (234) is installed on the second motor output end. The first motor output end is connected to the output shaft of the motor and is used to output power. The second motor output end is fixedly connected to the outer casing of the motor and is used to provide an installation foundation for the guide impeller (234).

6. The mine-used wet dust removal device for grading treatment according to particle size difference of dust according to claim 5, characterized in that, The mixed-flow impeller (233) has a blade installation angle of 45°, a hub ratio of 0.6, 12 blades, and a blade thickness of 6 mm.

7. A wet dust collector for mining applications that classifies dust particles based on size differences, as described in claim 5, is characterized in that... The guide impeller (234) has a blade installation angle of 30°, a hub ratio of 0.45, 11 blades, and a blade thickness of 4 mm.

8. The mine-used wet dust removal device for grading treatment according to particle size difference of dust according to claim 1, characterized in that, The demisting device (300) is a composite demisting grid plate, which includes trapezoidal grid plates (310) and hollow tubes (320) disposed between adjacent trapezoidal grid plates (310).

9. A wet dust collector for mining applications that classifies dust particles based on size differences, as described in claim 1, is characterized in that... A sewage tank (211) is provided at the bottom of the dust removal section housing (210) of the vibrating wire grid plate.

10. A wet dust collector for mining applications that classifies dust particles based on size differences, as described in claim 1, is characterized in that... The front side of the dust removal section housing (210) of the vibrating wire grid plate is equipped with a double-opening side door (212).

Images