Secondary cyclone dust removal equipment for underground air purification

Abstract

The invention discloses secondary cyclone dust removal equipment for underground air purification, and belongs to the technical field of coal mine dust removal equipment, the secondary cyclone dust removal equipment comprises a vertically arranged primary cyclone dust collector, and is characterized in that the upper part of the primary cyclone dust collector is communicated with a vertically arranged secondary cyclone dust removal integrator; the secondary cyclone dust removal integrator comprises a plurality of secondary cyclone dust removers which are distributed in a circumferential array manner, a dust collection barrel communicated with the lower parts of all the secondary cyclone dust removers, and an air collection barrel communicated with the upper parts of all the secondary cyclone dust removers. According to the dust removal equipment, the two-stage cyclone dust removers are adopted to work in parallel, compared with a traditional first-stage cyclone dust remover, the dust emission concentration is effectively reduced, and due to the fact that the multiple second-stage cyclone dust removers are arranged, fine particles can be captured more efficiently; the integrated design saves space and adapts to the underground narrow environment.

Description

Technical Field

[0001] This invention relates to the field of coal mine dust removal equipment technology, specifically a two-stage cyclone dust removal device for underground air purification. Background Technology

[0002] In industrial settings such as coal mining and tunnel construction, large amounts of suspended particulate matter, including coal dust and rock dust, are generated during operations. If not promptly purified, this can not only harm workers' health but also potentially cause safety accidents such as dust explosions. Currently, the most commonly used dust removal equipment is the cyclone dust collector, which separates dust using centrifugal force, eliminating the need for regular filter replacements and simplifying maintenance. However, existing cyclone dust collectors still have the following problems in practical applications: Dust removal effect is limited: Most of them are single-stage cyclone structures, relying on the length of a single cone and the intensity of airflow rotation to separate dust. The efficiency of capturing small particles is low, which easily leads to the emission gas still containing a lot of dust.

[0003] Poor adaptability: Traditional equipment cannot dynamically adjust the internal airflow channel according to the air intake volume, and the dust removal stability is insufficient when the air intake concentration or flow rate fluctuates. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a two-stage cyclone dust collector for underground air purification, which is a two-stage cyclone composite dust collector structure. Through graded treatment, the overall purification efficiency is improved, thereby solving the problem of the single dust removal effect of traditional cyclone dust collectors.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A two-stage cyclone dust collector for underground air purification includes a vertically arranged primary cyclone dust collector. The core improvement lies in the fact that a vertically arranged secondary cyclone dust collector is connected above the primary cyclone dust collector. The secondary cyclone dust collector includes multiple circumferentially arrayed secondary cyclone dust collectors, a dust collection cylinder connected below all the secondary cyclone dust collectors, and an air gathering cylinder connected above all the secondary cyclone dust collectors.

[0006] By adopting the above scheme, the dust removal equipment uses two-stage cyclone dust collectors working in parallel. Compared with the traditional single-stage cyclone dust collector, the dust emission concentration is effectively reduced. Since there are multiple two-stage cyclone dust collectors, they are more efficient at capturing fine particles. The integrated design saves space and is suitable for narrow underground environments.

[0007] As a preferred embodiment of a two-stage cyclone dust collector for downhole air purification, the first-stage cyclone dust collector includes a first-stage cylindrical body, with a first-stage conical body connected below it. The bottom of the conical body has a first-stage ash discharge port. A first-stage air inlet pipe is tangentially connected to one side of the first-stage cylindrical body. Inside the first-stage cylindrical body, a first-stage exhaust pipe is installed coaxially with it and extends upwards to the outside. During operation, the first-stage cyclone dust collector uses the tangential air inlet pipe to cause the airflow to spiral downwards, using centrifugal force to separate large particles. The tangential air inlet forms an outer swirling airflow, throwing dust against the cylinder wall and causing it to settle. The inner swirling airflow carries a small amount of dust and is discharged upwards from the first-stage exhaust pipe, ultimately achieving initial gas purification.

[0008] As a preferred embodiment of a two-stage cyclone dust collector for downhole air purification, the dust collection cylinder includes a dust collection cylinder body located above the primary cylindrical body and coaxially mounted on the primary exhaust pipe. A dust collection cylinder cover that can be opened or closed is installed on the top of the dust collection cylinder body. The dust collection cylinder mainly collects dust from the secondary ash discharge port, and its sealing design prevents secondary dust generation. The openable cover facilitates regular dust cleaning and avoids blockage.

[0009] As a preferred embodiment of a two-stage cyclone dust collector for downhole air purification, the two-stage cyclone dust collector includes a two-stage cylindrical body, with a two-stage conical body connected below it. The bottom of the conical body has a two-stage ash discharge port connected to a dust collection cylinder. A two-stage air inlet pipe is tangentially connected to one side of the cylindrical body. All two-stage air inlets are connected to the first-stage exhaust pipe. A two-stage exhaust pipe, coaxially arranged and extending upwards to the outside of the cylindrical body, is installed inside the cylindrical body. All two-stage exhaust pipes are ultimately connected to a dust collection cylinder. The working principle of multiple two-stage cyclone dust collectors is the same as that of a single-stage cyclone dust collector; they process the dust-laden airflow discharged from the first stage in parallel, further centrifugally separating fine particles. The dust is then concentrated and discharged to the dust collection cylinder through the two-stage ash discharge port, further reducing the overall emission concentration.

[0010] As a preferred embodiment of a two-stage cyclone dust collector for downhole air purification, the air-collecting duct includes an air-collecting duct body located above the primary exhaust pipe but not connected to the primary exhaust pipe, and an upward exhaust air guide nozzle connected above the air-collecting duct body; the air-collecting duct concentrates and exhausts the clean airflow from the secondary exhaust pipe, avoiding secondary pollution caused by airflow dispersion, and the air guide nozzle optimizes the exhaust direction and can be used to avoid the work area.

[0011] The second technical problem to be solved by the present invention is to provide a two-stage cyclone dust collector for downhole air purification. By introducing flexible diameter change technology to optimize airflow control, the airflow velocity from the first-stage cyclone dust collector to the second-stage cyclone dust collector is increased, thereby solving the problem of poor adaptability of traditional cyclone dust collectors.

[0012] To achieve the above objectives, the present invention provides the following technical solution: Based on the above scheme, a flexible diameter-changing mechanism is coaxially installed inside the first-stage cylindrical body before entering the second-stage cyclone dust collector; the flexible diameter-changing mechanism includes a diameter-changing airbag coaxially attached to the inner wall of the first-stage cylindrical body, wherein the diameter-changing airbag is made of flexible material, and an air supply pipe that penetrates the first-stage cylindrical body and the dust collection cylinder is connected to the diameter-changing airbag, and an air compressor connected to the air supply pipe is installed on the outer wall of the dust collection cylinder.

[0013] By adopting the above scheme, the diameter of the airbag is changed by filling and deflating the air compressor, and the diameter of the airflow channel inside the first-stage cylindrical body is dynamically adjusted. This allows for matching different air intake volumes. For example, the channel can be narrowed to enhance centrifugal force when the concentration is high, and the channel can be widened to reduce resistance when the concentration is low, thereby improving the adaptability of the dust removal equipment in application.

[0014] As a preferred embodiment of a two-stage cyclone dust collector for downhole air purification, the flexible diameter-changing mechanism also includes two annular baffles installed parallel to each other on the inner wall of the first-stage cylindrical shell. These annular baffles are made of rigid material, and the entire diameter-changing airbag is installed between the two annular baffles. The annular baffles prevent the diameter-changing airbag from shifting vertically, allowing it to more accurately adjust the diameter of the airflow channel within the first-stage cylindrical shell. Furthermore, the expansion or contraction of the airbag is precisely controlled by an air compressor, ensuring the reliability of the airflow channel adjustment.

[0015] As a preferred embodiment of a two-stage cyclone dust collector for downhole air purification, the dust collection cylinder is also equipped with a protective pipe that completely wraps the part of the air delivery pipe inside the dust collection cylinder, protecting the air delivery pipe from dust wear or corrosion, extending the life of the pneumatic control system, and preventing air leakage from affecting the diameter change effect.

[0016] The beneficial effects of this invention are: 1. Significantly improved dust removal efficiency: The parallel operation of two-stage cyclone dust collectors effectively reduces dust emission concentration compared to traditional single-stage cyclone dust collectors. Due to the presence of multiple two-stage cyclone dust collectors, the collection of fine particles is more efficient. The integrated design saves space and is suitable for narrow underground environments. 2. Strong adaptability and stability: The flexible variable diameter mechanism dynamically adjusts the airflow channel to match different working conditions (such as high / low air intake) and avoids the decline in dust removal effect due to parameter fluctuations; 3. Easy maintenance: The dust collection cylinder collects dust centrally and can be opened for cleaning. The two-stage cyclone parallel design reduces the load on a single device and extends the overall service life. 4. Safe and reliable: No filter replacement is required, avoiding secondary pollution caused by filter failure; pneumatic control components are well protected and adaptable to humid and dusty underground environments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A 3D view of a two-stage cyclone dust collector for underground air purification; Figure 2 To showcase Figure 1 A three-dimensional diagram of the internal structure and airflow path; Figure 3 A three-dimensional view of a primary cyclone dust collector; Figure 4 To showcase Figure 3 A three-dimensional diagram of the internal structure; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 A three-dimensional view of a two-stage cyclone dust collector; Figure 7 To showcase Figure 6 A three-dimensional diagram of the internal structure; Figure 8 for Figure 7 A magnified view of a section at point B in the middle.

[0019] The diagram shows the following markings: 1-First-stage cyclone dust collector; 11-First-stage cylindrical body; 12-First-stage conical body; 13-First-stage ash discharge port; 14-First-stage air inlet pipe; 15-First-stage exhaust pipe; 2-Second-stage cyclone dust collector integrator; 21-Second-stage cyclone dust collector; 211-Second-stage cylindrical body; 212-Second-stage conical body; 213-Second-stage ash discharge port; 214-Second-stage air inlet pipe; 215-Second-stage exhaust pipe; 22-Dust collection cylinder; 221-Dust collection cylinder body; 222-Dust collection cylinder cover; 23-Air concentrator; 231-Air concentrator body; 232-Air guide nozzle; 3-Flexible diameter changing mechanism; 31-Diameter changing airbag; 32-Air delivery pipe; 33-Air compressor; 34-Annular baffle; 35-Protective pipe. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0021] like Figures 1 to 2As shown, a two-stage cyclone dust collector for underground air purification is provided. It is used in industrial settings such as coal mining and tunnel construction to remove large amounts of suspended particulate matter, such as coal dust and rock dust, generated during operations. Specifically, it includes a vertically arranged primary cyclone dust collector 1, with a vertically arranged secondary cyclone dust collector integrated unit 2 connected above it. This secondary cyclone dust collector integrated unit 2 includes five circumferentially arrayed secondary cyclone dust collectors 21, a dust collection cylinder 22 connected below all the secondary cyclone dust collectors 21, and an air-gathering cylinder 23 connected above all the secondary cyclone dust collectors 21. This dust collection equipment uses two secondary cyclone dust collectors 21 operating in parallel. Compared to the traditional primary cyclone dust collector 1, the dust emission concentration is effectively reduced. Because there are multiple secondary cyclone dust collectors 21, the collection of fine particles is more efficient. The integrated design saves space and is suitable for the narrow environment of underground mines.

[0022] like Figures 3 to 4 As shown, the primary cyclone dust collector 1 includes a primary cylindrical body 11, with a primary conical body 12 connected below it. The bottom of the conical body 12 has a primary ash discharge port 13. A primary air inlet pipe 14 is tangentially connected to one side of the primary cylindrical body 11. A primary exhaust pipe 15, coaxially arranged and extending upwards to the outside of the primary cylindrical body 11, is installed inside it. During operation, the primary cyclone dust collector 1 uses the tangential primary air inlet pipe 14 to cause the airflow to spiral downwards, using centrifugal force to separate large particles. The tangential airflow forms an outer swirling airflow, throwing dust against the cylinder wall and causing it to settle. The inner swirling airflow carries a small amount of dust and is discharged upwards from the primary exhaust pipe 15, ultimately achieving initial gas purification.

[0023] like Figures 6 to 7 As shown, the dust collection cylinder 22 includes a dust collection cylinder body located above the primary cylindrical body 11 and coaxially mounted on the primary exhaust pipe 15. A dust collection cylinder cover that can be opened or closed is installed above the dust collection cylinder body. The dust collection cylinder 22 mainly collects dust from the secondary ash discharge port 213. Its sealing design prevents secondary dust generation. The openable cover facilitates regular dust cleaning and avoids clogging.

[0024] Continue as Figures 6 to 7As shown, the secondary cyclone dust collector 21 includes a secondary cylindrical body 211, with a secondary conical body 212 connected below it. The bottom of the conical body 212 has a secondary ash discharge port 213 connected to the dust collection cylinder 22. A secondary air inlet pipe 214 is tangentially connected to one side of the secondary cylindrical body 211. All secondary air inlet pipes 214 are connected to the primary exhaust pipe 15. A secondary exhaust pipe 215, coaxially arranged and extending upwards to the outside of the secondary cylindrical body 211, is installed inside it. All secondary exhaust pipes 215 are ultimately connected to the air collection cylinder 23. The working principle of the five secondary cyclone dust collectors 21 is the same as that of the primary cyclone dust collector 1. They process the dust-laden airflow discharged from the primary stage in parallel, further centrifugally separating fine particles. The secondary ash discharge port 213 centrally discharges dust to the dust collection cylinder 22, further reducing the overall emission concentration.

[0025] Continue as Figures 6 to 7 As shown, the air-concentrating duct 23 includes an air-concentrating duct body located above the primary exhaust pipe 15 but not connected to the primary exhaust pipe 15, and an upward exhaust nozzle 232 connected above the air-concentrating duct body 23; the air-concentrating duct 23 concentrates and exhausts the clean airflow from the secondary exhaust pipe 215, avoiding secondary pollution caused by airflow dispersion, and the exhaust nozzle 232 optimizes the exhaust direction and can be used to avoid the work area.

[0026] like Figure 5 , Figure 8 As shown, a flexible diameter-changing mechanism 3 is coaxially arranged inside the primary cylindrical shell 11 before entering the secondary cyclone dust collector 21. The flexible diameter-changing mechanism 3 includes a diameter-changing airbag 31 coaxially attached to the inner wall of the primary cylindrical shell 11. The diameter-changing airbag 31 is made of flexible material. An air supply pipe 32, which penetrates the primary cylindrical shell 11 and the dust collection cylinder 22, is connected to the diameter-changing airbag 31. An air compressor 33, which communicates with the air supply pipe 32, is installed on the outer wall of the dust collection cylinder 22. By inflating and deflating the airbag by the air compressor 33, the diameter of the airflow channel inside the primary cylindrical shell 11 is dynamically adjusted, which can match different air intake volumes. For example, when the concentration is high, the channel is narrowed to enhance centrifugal force, and when the concentration is low, the channel is widened to reduce resistance, thereby improving the adaptability of the dust removal equipment.

[0027] Continue as Figure 5 , Figure 8 As shown, the flexible diameter-changing mechanism 3 also includes two annular baffles 34 installed parallel to each other on the inner wall of the first-stage cylindrical body 11. The annular baffles 34 are made of rigid material, and the entire diameter-changing airbag 31 is installed between the two annular baffles 34. The annular baffles 34 can prevent the diameter-changing airbag 31 from shifting vertically, allowing the diameter-changing airbag 31 to more accurately adjust the diameter of the airflow channel inside the first-stage cylindrical body 11. Then, the air compressor 33 precisely controls the expansion or contraction of the airbag to ensure the reliability of the airflow channel adjustment.

[0028] like Figure 8 As shown, the dust collection cylinder 22 is also equipped with a protective pipe 35 that completely wraps the air supply pipe 32 inside the dust collection cylinder 22, protecting the air supply pipe 32 from dust wear or corrosion, extending the life of the pneumatic control system, and preventing air leakage from affecting the diameter change effect.

[0029] Please refer to the working principle of this two-stage cyclone dust collector for underground air purification. Figure 2 ( Figure 2 (Solid arrows represent gas, dashed arrows represent dust): The dust-laden airflow enters the primary cylindrical body 11 tangentially from the primary inlet pipe 14, forming an external swirling airflow. As the spiral descends, large particles are thrown to the cylinder wall due to centrifugal force, while dust is thrown to the cylinder wall and settles at the primary ash discharge port 13. The internal swirling airflow carries a small amount of dust and is discharged upwards from the primary exhaust pipe 15, ultimately achieving the initial purification of the gas. The initially purified airflow enters the secondary cyclone dust collector 2 through the primary exhaust pipe 15, and is evenly distributed to multiple secondary cylindrical bodies 211 through the secondary inlet pipe 214. After further centrifugal separation, the fine particles settle to the secondary ash discharge port 213 and enter the dust collection cylinder 22. The clean airflow converges to the air collection duct 23 through the secondary exhaust pipe 215 and is discharged upwards through the air guide nozzle 232. Before operation, the diameter of the variable diameter airbag 31 can be adjusted by the air compressor 33 to optimize the airflow velocity in the primary cylinder, ensuring efficient dust removal under different working conditions.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A two-stage cyclone dust collector for underground air purification, comprising a vertically arranged primary cyclone dust collector, characterized in that: Above the primary cyclone dust collector is a vertically arranged secondary cyclone dust collector integrated unit, which includes multiple circumferentially arrayed secondary cyclone dust collectors, a dust collection cylinder connected to the bottom of all the secondary cyclone dust collectors, and an air gathering cylinder connected to the top of all the secondary cyclone dust collectors.

2. The two-stage cyclone dust collector for downhole air purification according to claim 1, characterized in that, The primary cyclone dust collector includes a primary cylindrical body, a primary conical body connected below the primary cylindrical body, a primary ash discharge port at the bottom of the primary conical body, a primary air inlet pipe tangentially connected to one side of the primary cylindrical body, and a primary exhaust pipe coaxially arranged inside the primary cylindrical body and extending upward to the outside.

3. The two-stage cyclone dust collector for downhole air purification according to claim 2, characterized in that, The dust collection cylinder includes a dust collection cylinder body located above the primary cylindrical body and coaxially mounted on the primary exhaust pipe, and a dust collection cylinder cover that can be opened or closed is installed on the top of the dust collection cylinder body.

4. The two-stage cyclone dust collector for downhole air purification according to claim 2, characterized in that, The secondary cyclone dust collector includes a secondary cylindrical body, with a secondary conical body connected below it. The bottom of the secondary conical body is provided with a secondary ash discharge port that communicates with the dust collection cylinder. A secondary air inlet pipe is tangentially connected to one side of the secondary cylindrical body. All secondary air inlet pipes are connected to the primary exhaust pipe. A secondary exhaust pipe is installed inside the secondary cylindrical body, coaxially arranged with it and extending upward to the outside. All secondary exhaust pipes are ultimately connected to the air collection cylinder.

5. The two-stage cyclone dust collector for downhole air purification according to claim 2, characterized in that, The air-gathering duct includes an air-gathering duct body located above the primary exhaust pipe but not connected to the primary exhaust pipe, and an upward exhaust air guide nozzle connected above the air-gathering duct body.

6. The two-stage cyclone dust collector for downhole air purification according to claim 2, characterized in that, The primary cylindrical body is coaxially equipped with a flexible diameter-changing mechanism that enters the secondary cyclone dust collector.

7. The two-stage cyclone dust collector for downhole air purification according to claim 6, characterized in that, The flexible diameter-changing mechanism includes a diameter-changing airbag coaxially attached to the inner wall of the primary cylindrical body. The diameter-changing airbag is made of flexible material. An air supply pipe that penetrates the primary cylindrical body and the dust collection cylinder is connected to the diameter-changing airbag. An air compressor that communicates with the air supply pipe is installed on the outer wall of the dust collection cylinder.

8. The two-stage cyclone dust collector for downhole air purification according to claim 7, characterized in that, The flexible diameter-changing mechanism also includes two annular baffles installed in parallel on the inner wall of the primary cylindrical body. The annular baffles are made of rigid material, and the entire diameter-changing airbag is installed between the two annular baffles.

9. The two-stage cyclone dust collector for downhole air purification according to claim 7, characterized in that, The dust collection cylinder is also equipped with a protective tube that completely encloses the gas delivery pipe inside the dust collection cylinder.

Images