A dust removal device for mining

Abstract

This invention discloses a dust removal device for mining applications in the field of mining environmental engineering technology. The device includes a pipe, a fence, an atomizer, and a fan. The fence is installed inside the pipe, the atomizer is located between the pipe inlet and the fence, and the fan is connected to the pipe inlet. The fan uses turbulent blades. The atomizer creates a high-concentration, uniform water mist field, causing fine dust particles and water droplets to combine under Brownian motion and inertial collisions to form moist condensation nuclei. The fan then creates a turbulent flow field inside the pipe, causing free dry dust particles and tiny droplets to collide with the formed condensation nuclei at high frequency, resulting in mutual adhesion and agglomeration. A fence is installed downstream of the atomizer to intercept the agglomerated sludge. Clean airflow passes through the fence openings and is discharged through the outlet, achieving precise capture and efficient interception of respirable dust.

Description

Technical Field

[0001] This invention relates to the field of mining environmental engineering technology, specifically to a dust removal device for mining operations. Background Technology

[0002] Currently, most dust removal in mines uses filter screen interception equipment, which uses the pores of the filter screen to block dust particles in the dust-laden airflow, thus achieving air-dust separation.

[0003] High humidity is common in underground mines, where mine dust easily absorbs moisture and clumps together. Even after clumping, the dust particles remain small. Therefore, when using a simple filtration or interception structure, only a portion of the moisture-absorbing and clumping dust particles can be intercepted by the filter screen due to their small size. This not only results in unsatisfactory purification effects, but also causes the intercepted moisture-absorbing and clumping dust to adhere tightly to the filter screen surface, making it impossible to clean the filter screen in a timely and effective manner, leading to a sharp decline in dust removal efficiency.

[0004] In summary, existing dust removal equipment used in mining operations is insufficient to handle the processing needs of small-particle, hygroscopic, and agglomerated mineral dust in high-humidity environments, resulting in poor purification effects and easy clogging of filters. Summary of the Invention

[0005] Therefore, this invention provides a dust removal device for mining operations to address the problems of existing dust removal devices in mining operations being unable to handle the processing needs of small-particle-size hygroscopic and agglomerated mineral dust in high-humidity environments, resulting in poor purification effects and easy clogging of filters.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions: A dust removal device for mining operations, comprising: The pipe has an air inlet and an air outlet at both ends along the airflow direction. A fence is installed inside the pipe, and the pores of the fence meet the following conditions: it allows airflow to pass through while intercepting clumps of mud that have agglomerated. Atomizer is fixedly installed inside the pipe and located between the air inlet and the grille. The atomizer is used to spray high-concentration water mist. The atomized droplets sprayed by the atomizer meet the following conditions: the atomized droplet size matches the aerodynamic equivalent diameter of the respirable dust, forming a high-concentration uniform water mist field so that the fine dust and water droplets collide and combine to form wet condensation nuclei. A fan, connected to the air inlet, is used to provide directional driving force for the dust-laden airflow, causing the dust-laden air to flow directionally from the air inlet to the air outlet. A guide plate with random orientation is provided in the pipe wall near the air outlet of the fan. When the laminar airflow passes through the guide plate, it forms turbulence, thereby creating a turbulent flow field inside the pipe. This causes free dry dust particles and tiny droplets to collide at high frequency with the formed condensation nuclei, achieving mutual adhesion and agglomeration. The length of the tube section between the fence and the atomizer satisfies the following condition: allowing dust and water droplets to collide and agglomerate in turbulent flow to form mud.

[0007] As a preferred embodiment of the dust removal equipment for mining according to the present invention, a high-pressure nozzle is provided on the inner wall of the pipeline, and the spraying direction of the high-pressure nozzle is towards the fence, and the fence is rotatably connected to the pipeline.

[0008] As a preferred embodiment of a dust removal device for mining applications according to the present invention, the atomizer includes: A ring-shaped water distribution pipeline is coaxially and fixedly assembled on the inner wall of the pipeline; A plurality of atomizing nozzles are evenly distributed along the inner circumference of the annular water distribution pipeline. All of the atomizing nozzles are connected to the annular water distribution pipeline, and the spray direction is directed toward the central area of ​​the pipeline.

[0009] As a preferred embodiment of the dust removal equipment for mining according to the present invention, a motor is fixedly installed on the side of the pipe near the air outlet, and a scraper is fixedly connected to the output shaft of the motor. The scraper is located between the air outlet and the fence, and the cutting edge of the scraper is in close contact with the inner wall of the pipe. The motor is used to drive the scraper to rotate, so as to scrape off the mud that has settled and adhered to the inner wall of the pipe.

[0010] As a preferred embodiment of the dust removal equipment for mining according to the present invention, a drain outlet is provided at the bottom of the pipe, and the drain outlet is located in the area directly below the scraper and the fence.

[0011] The embodiments of the present invention have the following advantages: This invention creates a high-concentration, uniform water mist field by installing an atomizer inside the pipe. This allows fine dust particles and water droplets to combine under Brownian motion and inertial collisions to form moist condensation nuclei. A fan with turbulent blades then creates a turbulent flow field inside the pipe, causing free dry dust particles and tiny droplets to collide with the formed condensation nuclei at high frequency, resulting in mutual adhesion and agglomeration. A grid is installed downstream of the atomizer to intercept the agglomerated clumps, while clean airflow passes through the grid openings and is discharged through the outlet, achieving precise capture and efficient interception of respirable dust. Attached Figure Description

[0012] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0013] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0014] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the pipeline in an embodiment of the present invention.

[0015] In the picture: 1. Pipeline; 11. Air inlet; 12. Air outlet; 2. Fence; 3. Atomizer; 31. Circular water distribution pipeline; 32. Atomizing nozzle; 4. Fan; 5. High-pressure nozzle; 6. Motor; 7. Scraper; 8. Drain outlet. Detailed Implementation

[0016] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This invention provides a dust removal device for mining operations. Please refer to [link / reference]. Figure 1-2 The system primarily works by using an atomizer inside the pipe to spray high-concentration water mist, causing fine dust particles to collide and combine with water droplets to form moist condensation nuclei. A fan is installed at the air inlet, and a randomly oriented guide plate is installed inside the fan. When the laminar airflow passes through the guide plate, it forms turbulence, which causes free dry dust particles and tiny droplets to collide with the formed condensation nuclei at high frequency, resulting in mutual adhesion and aggregation. Finally, the particles are intercepted by the grid, thus achieving dust removal.

[0018] The mine's dust removal equipment includes: Pipeline 1 has an air inlet 11 and an air outlet 12 at both ends along the airflow direction; Fence 2 is installed inside pipe 1. The pores of fence 2 meet the following conditions: they allow airflow to pass through while intercepting clumps of mud that have formed agglomeration. Atomizer 3 is fixedly installed inside pipe 1 and located between air inlet 11 and fence 2. Atomizer 3 is used to spray high-concentration water mist. The atomized droplets sprayed by atomizer 3 meet the following conditions: the atomized droplet size matches the aerodynamic equivalent diameter of respirable dust, forming a high-concentration uniform water mist field, so that fine dust and water droplets combine under Brownian motion and inertial collision to form wet condensation nuclei. The fan 4 is connected to the air inlet 11 and is used to provide directional driving force for the dust-laden airflow, so that the dust-laden airflow flows directionally from the air inlet 11 to the air outlet 12. The fan 4 has a randomly oriented guide plate in the pipe wall near the air outlet end. When the laminar airflow passes through the guide plate, it forms turbulence, so as to form a turbulent flow field inside the pipe 1, which promotes the free dry dust particles and tiny droplets to collide with the formed condensation nuclei at high frequency, so as to achieve mutual adhesion and agglomeration. The length of the tube section between the fence 2 and the atomizer 3 meets the following condition: allowing dust and water droplets to collide and agglomerate in turbulent flow to form mud.

[0019] In this method, after the fan 4 starts, it drives the dust-laden airflow to flow into the pipe 1 in a directional manner. The atomizer 3 sprays out a high-concentration uniform water mist field that matches the particle size of the respirable dust. The fine dust and water droplets combine under the action of Brownian motion and inertial collision to form moist condensation nuclei. The turbulent blades form a turbulent flow field inside the pipe 1, which causes the free dry dust particles, tiny droplets and the formed condensation nuclei to collide at high frequency, so that they adhere and agglomerate with each other, gradually forming mud. The pipe section between the grid 2 and the atomizer 3 provides sufficient space for dust agglomeration. The formed mud is intercepted by the grid 2, and the clean airflow is discharged through the air outlet 12 through the gaps in the grid 2, realizing the precise capture and efficient interception of respirable dust.

[0020] To improve the anti-clogging performance of fence 2, ensure continuous and stable airflow, and maintain the dust interception effect, the following preferred embodiments are proposed: Specifically, a high-pressure nozzle 5 is provided on the inner wall of the pipe 1, and the spray direction of the high-pressure nozzle 5 is towards the fence 2, and the fence 2 is rotatably connected to the pipe 1.

[0021] The fence 2 is driven to rotate by a drive device, and pressure sensing devices are set on both sides of the fence 2 (both the drive device and the pressure sensing device are existing technologies and are not shown in the figure, so they will not be explained in detail here). When the fence 2 has been working for a period of time, the pressure difference on both sides of the fence 2 reaches a set threshold, triggering the cleaning work, starting the high-pressure nozzle 5, and driving the fence 2 to rotate. The rotating fence 2 can increase the probability of contact with mud in the airflow and improve the comprehensiveness of interception. On the other hand, it is convenient for the high-pressure nozzle 5 to thoroughly clean the fence 2.

[0022] In this way, the high-pressure nozzle 5 can spray high-pressure water in a directional manner to wash away the mud adhering to the surface of the fence 2. Combined with the rotation of the fence 2, it can achieve a comprehensive washing of the entire fence 2, promptly peel off the accumulated mud, prevent the pores of the fence 2 from being blocked by mud, ensure smooth airflow through the fence 2, and continuously maintain the fence 2's ability to intercept condensed mud, ensuring the long-term stable operation of the dust removal equipment.

[0023] To further improve the uniformity of the water mist field and ensure sufficient multi-directional contact between fine dust and water droplets, the following preferred embodiments are proposed: Specifically, atomizer 3 includes: The annular water distribution pipe 31 is coaxially fixedly assembled on the inner wall of the pipe 1; Several atomizing nozzles 32 are evenly distributed along the inner wall of the annular water distribution pipe 31. All atomizing nozzles 32 are connected to the annular water distribution pipe 31, and the spray direction is towards the central area of ​​the pipe 1.

[0024] In this manner, the circumferentially evenly distributed atomizing nozzles 32 spray synchronously from all sides of the pipe 1 toward the center. Combined with the uniform water distribution effect of the annular water distribution pipe 31, a high-concentration uniform water mist field is formed inside the pipe 1. This ensures that all dust-laden airflow passing through this area can fully contact the atomized droplets, improve the binding efficiency of dust and droplets, and enhance the condensation nucleus formation effect.

[0025] After the dust is intercepted and removed by the fence 2, a small amount of mud clumps in the airflow will still pass through the fence 2 and move downstream of the pipe 1. Due to gravity, the mud clumps are easy to settle and adhere to the inner wall of the pipe 1. In order to remove the mud clumps that have settled and adhered to the inner wall of the pipe 1 and avoid the accumulation of mud clumps affecting the internal flow field of the pipe 1, the following preferred embodiment is proposed: Specifically, a motor 6 is fixedly installed inside the pipe 1 on the side near the air outlet 12. A scraper 7 is fixedly connected to the output shaft of the motor 6. The scraper 7 is located between the air outlet 12 and the fence 2, and the cutting edge of the scraper 7 is tightly fitted with the inner wall of the pipe 1. The motor 6 is used to drive the scraper 7 to rotate, so as to scrape off the mud that has settled and adhered to the inner wall of the pipe 1.

[0026] In this method, after the motor 6 is powered on, it drives the scraper 7 to rotate continuously. The blade of the scraper 7 rotates in close contact with the inner wall of the pipe 1, directly scraping off the mud that has settled and adhered to the inner wall. The mud is then removed from the pipe wall, preventing the mud from accumulating and solidifying on the pipe wall, ensuring that the inner wall of the pipe 1 is smooth and maintaining the stability of the turbulent flow field inside the pipe 1.

[0027] To quickly remove scraped-off mud and impurities and prevent impurities from accumulating at the bottom of pipe 1, the following preferred embodiment is proposed: Specifically, a drain outlet 8 is provided at the bottom of the pipe 1, and the drain outlet 8 is located in the area directly below the scraper 7 and the fence 2.

[0028] In this way, the mud scraped off by the scraper 7 and the mud intercepted by the fence 2 are directly discharged into the outside of the pipe 1 through the sewage outlet 8 directly opposite to it, so as to realize the immediate cleaning and discharge of mud and impurities and ensure the cleanliness of the internal space of the pipe 1.

[0029] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A dust removal device for mining operations, characterized in that, have: The pipe (1) has an air inlet (11) and an air outlet (12) at both ends along the airflow direction. A fence (2) is installed inside the pipe (1), and the pores of the fence (2) satisfy the following conditions: it allows airflow to pass through while intercepting clumps of mud that have formed agglomeration. Atomizer (3) is fixedly installed inside the pipe (1) and located between the air inlet (11) and the fence (2). The atomizer (3) is used to spray high-concentration water mist. The atomized droplets sprayed by the atomizer (3) meet the following conditions: the atomized droplet size matches the aerodynamic equivalent diameter of the respirable dust, forming a high-concentration uniform water mist field so that the fine dust and water droplets collide and combine to form wet condensation nuclei. The fan (4) is connected to the air inlet (11) and is used to provide directional driving force for the dust-laden airflow, so that the dust-laden airflow flows directionally from the air inlet (11) to the air outlet (12). A guide plate with random orientation is provided in the pipe wall near the air outlet of the fan (4). When the laminar airflow passes through the guide plate, it forms turbulence, so as to form a turbulent flow field inside the pipe (1), which promotes the free dry dust particles, tiny droplets and the formed condensation nuclei to collide at high frequency, so as to achieve mutual adhesion and agglomeration. The length of the pipe section between the fence (2) and the atomizer (3) satisfies the following condition: allowing dust and water droplets to collide and condense in turbulent flow to form mud.

2. The dust removal equipment for mining as described in claim 1, characterized in that: A high-pressure nozzle (5) is provided on the inner wall of the pipe (1), and the spraying direction of the high-pressure nozzle (5) is towards the fence (2), and the fence (2) is rotatably connected to the pipe (1).

3. The dust removal equipment for mining as described in claim 1, characterized in that: The atomizer (3) includes: The annular water distribution pipeline (31) is coaxially fixedly assembled on the inner wall of the pipeline (1); A number of atomizing nozzles (32) are evenly distributed along the inner wall of the annular water distribution pipeline (31). All atomizing nozzles (32) are connected to the annular water distribution pipeline (31), and the spray direction is towards the central area of ​​the pipeline (1).

4. The dust removal equipment for mining as described in claim 1, characterized in that: A motor (6) is fixedly installed on one side of the pipe (1) near the air outlet (12). A scraper (7) is fixedly connected to the output shaft of the motor (6). The scraper (7) is located between the air outlet (12) and the fence (2), and the cutting edge of the scraper (7) is tightly attached to the inner wall of the pipe (1). The motor (6) is used to drive the scraper (7) to rotate in order to scrape off the mud that has settled and adhered to the inner wall of the pipe (1).

5. A dust removal device for mining operations according to claim 4, characterized in that: A drain outlet (8) is provided at the bottom of the pipe (1), and the drain outlet (8) is located in the area directly below the scraper (7) and the fence (2).

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