A coal mine roadway integrated dry and wet dust removal system

Abstract

This invention proposes an integrated dry and wet dust removal system for coal mine roadways, belonging to the field of coal mine construction technology. It solves the problem that traditional dust removal equipment, relying solely on wear-resistant layers for protection, cannot mitigate the impact energy of dust airflow, leading to localized perforation and failure of the wear-resistant layer, making the equipment prone to damage. It includes a fan, an air inlet duct, and a dust removal device connected in sequence. The dust removal device internally contains a venturi tube assembly and a filter layer. The surface of the venturi tube assembly is covered with a wear-resistant layer and elastically connected to the dust removal device to absorb impact. The filter layer is fixedly connected to the dust removal device, and an annular atomizing nozzle is installed at the inlet of the dust removal device. It is mainly used for gas dust removal in coal mine roadways.

Description

Technical Field

[0001] This invention belongs to the field of coal mine construction technology, and in particular relates to an integrated dry and wet dust removal system for coal mine roadways. Background Technology

[0002] Strict control of underground air quality is crucial during coal mine construction, as miners' health and safety are directly related to air quality. Coal mine construction or mining generates large amounts of underground dust, which not only severely affects miners' respiratory system and vision, reducing work efficiency, but also, when dust concentrations reach certain levels, can trigger safety accidents such as dust explosions or fires.

[0003] Therefore, dust removal equipment plays a particularly important role in coal mine construction. Effective dust removal equipment can promptly remove dust from the air, prevent excessive dust concentration, protect the miners' working environment, and improve work efficiency. At the same time, it can also prevent safety accidents caused by dust, ensuring the safety of miners' lives.

[0004] Mine dust contains high-hardness dust particles such as silica dust and rock dust, thus requiring high wear resistance from dust removal equipment. However, traditional dust removal equipment relies solely on wear-resistant layers for protection. While these layers can resist the direct impact of high-hardness dust, they cannot mitigate the impact energy of dust airflow. Continuous impact of high-speed dust airflow on a fixed location can cause the wear-resistant layer to perforate or peel off, leading to its failure and making the equipment prone to damage. Summary of the Invention

[0005] In view of this, to address the problem that traditional dust removal equipment, relying solely on wear-resistant layers for protection, cannot mitigate the impact energy of dust airflow, leading to localized perforation and failure of the wear-resistant layer and easy equipment damage, this invention proposes an integrated dry and wet dust removal system for coal mine roadways. This system employs a "wear-resistant layer + vibration-damping structure," elastically connecting both sides of the Venturi tube assembly to the frame. Springs absorb the impact energy of dust particles, reducing the direct force on the wear-resistant layer. The buffer design dynamically changes the impact location on the equipment wall, preventing continuous localized wear and extending the overall lifespan of the wear-resistant layer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a coal mine roadway dry and wet integrated dust removal system, comprising a fan, an air inlet pipe and a dust removal device connected in sequence. The dust removal device is provided with a venturi tube assembly and a filter layer inside. The surface of the venturi tube assembly is provided with a wear-resistant layer, and the venturi tube assembly is elastically connected to the dust removal device for absorbing impact. The filter layer is fixedly connected to the dust removal device, and an annular atomizing nozzle is provided at the inlet of the dust removal device.

[0007] Furthermore, the dust removal device includes multiple dust collection boxes and multiple air distributors. The dust collection box has a cylindrical structure, with the Venturi tube assembly and filter layer located inside the dust collection box. The Venturi tube assembly is elastically connected to the dust collection box, and the filter layer is fixedly connected to the dust collection box. The multiple dust collection boxes are connected in parallel to each other and are connected to the air inlet duct through a pipe. The multiple air distributors are installed on the pipe between the multiple dust collection boxes and the air inlet duct to control the degree of connection between the dust collection boxes and the air inlet duct.

[0008] Furthermore, the air distributor includes a motor and an air distribution plate connected together. The motor is fixedly connected to the duct, and the air distribution plate is located inside the duct. The air distribution plate is a quarter-sphere.

[0009] Furthermore, the venturi tube assembly is made of stainless steel, the wear-resistant layer is made of tungsten carbide, and the filter layer includes a first filter layer and a second filter layer.

[0010] Furthermore, the first filter layer has a stainless steel wire outer surface and Pall rings as the internal filler, while the second filter layer is an activated carbon fiber felt layer.

[0011] Furthermore, an annular atomizing nozzle is provided at the inlet of the dust collection box, with its blowing direction directed toward the Venturi tube assembly.

[0012] Furthermore, the annular atomizing nozzle is located at the inlet of the dust collection box, with the inner ring being a liquid channel connected to an external water supply pipe and the outer ring being a gas channel connected to an external gas supply pipe.

[0013] Furthermore, the bottom of the dust collection box is equipped with a sewage discharge pipe, which is connected to an external sewage discharge device for discharging wastewater.

[0014] Furthermore, the dust collection box extends inward and is provided with a pair of mounting frames, and the left and right ends of the Venturi tube assembly are elastically connected to the pair of mounting frames.

[0015] Furthermore, the venturi tube assembly and the mounting frame are elastically connected by a pin and a buffer spring. The two ends of the pin are connected to the mounting frame and the venturi tube assembly, respectively. The buffer spring is sleeved on the middle section of the pin located between the mounting frame and the venturi tube assembly. The two ends of the buffer spring are in contact with the mounting frame and the venturi tube assembly, respectively. The venturi tube assembly can slide along the pin.

[0016] Compared with the prior art, the beneficial effects of the integrated dry and wet dust removal system for coal mine roadways described in this invention are: 1. The Venturi tube assembly of the present invention is elastically connected to the dust collector box, which can effectively absorb and mitigate the impact energy of the dust-laden airflow, reduce the impact loss of the wear-resistant layer on the surface of the Venturi tube assembly, and improve the service life of the equipment.

[0017] 2. This invention achieves an integrated dust removal system combining "dry" and "wet" methods through the synergistic effect of annular atomizing nozzles, venturi tube assemblies, and filter layers. It has high dust removal efficiency, fast gas purification speed, and the purified gas is directly discharged into the coal mine roadway, effectively improving the gas environment in the coal mine and protecting the health of personnel.

[0018] 3. This invention is equipped with an air distributor that can control the degree and number of connections between the dust collection boxes and the air inlet duct, enabling flexible adjustment of the equipment to adapt to different working conditions. The dust collection workload can be dynamically adjusted according to the dust collection demand. When the dust collection demand is low, the fan power is reduced and a small number of dust collection boxes are connected to the air inlet duct, saving energy and reducing equipment wear. When the dust collection demand is high, the fan power is increased and a small number of dust collection boxes are connected to the air inlet duct, while multiple dust collection boxes are connected to achieve efficient dust collection. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of the integrated dry and wet dust removal system for coal mine roadways according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the integrated dry and wet dust removal system for coal mine roadways according to the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the dust removal device described in this invention; Figure 4 This is a bottom view of the dust removal device described in this invention; Figure 5 This is a front view of the dust collector described in this invention; Figure 6 This is a right view of the dust collector box described in this invention; Figure 7 For the present invention Figure 6 Sectional view at point A in the middle; Figure 8 This is a bottom view of the dust collector box described in this invention; Figure 9 This is a schematic diagram of the structure of the air distributor described in this invention; Figure 10 This is a schematic diagram of the structure of the air distribution plate described in this invention; Figure 11 This is a schematic diagram of the structure of the annular atomizing nozzle described in this invention; Figure 12 This is a left view of the annular atomizing nozzle described in this invention; Figure 13 This is a front view of the annular atomizing nozzle described in this invention; Figure 14 For the present invention Figure 13 Sectional view at point B; Figure 15 This is a schematic diagram of the mounting frame and venturi tube assembly described in this invention; Figure 16 For the present invention Figure 15 A magnified view of a section at point C; Figure 17 For the present invention Figure 15 Left view of the structure; Figure 18 For the present invention Figure 17 A cross-sectional view along the D direction; Figure 19 For the present invention Figure 18 A magnified view of a section at point E in the middle; In the diagram: 1-fan; 2-air inlet duct; 3-dust collector; 4-air distributor; WP1-air pump; WP2-water pump; WP3-sewage pump; 31-Venturi tube assembly; 32-Filter layer; 33-Annular atomizing nozzle; 34-Drainage pipe; 35-Mounting frame; 36-Pin; 37-Buffer spring; 41-Motor; 42-Air distribution plate; 321 - First filter layer; 322 - Second filter layer; 331 - Inner ring; 332 - Outer ring; 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. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0021] I. Detailed Implementation Method 1, see [link / reference] Figure 1-19 This embodiment describes a coal mine roadway integrated dry and wet dust removal system, comprising a fan 1, an air inlet duct 2, and a dust removal device connected in sequence. The dust removal device is equipped with a Venturi tube assembly 31 and a filter layer 32 inside. The surface of the Venturi tube assembly 31 is provided with a wear-resistant layer, and the Venturi tube assembly 31 is elastically connected to the dust removal device to absorb impact. The filter layer 32 is fixedly connected to the dust removal device, and an annular atomizing nozzle is provided at the inlet of the dust removal device.

[0022] The dust removal device includes multiple dust collection boxes 3 and multiple air distributors 4. The dust collection box 3 has a cylindrical structure. The Venturi tube assembly 31 and the filter layer 32 are arranged sequentially along the airflow direction inside the dust collection box 3. The Venturi tube assembly 31 is elastically connected to the dust collection box 3, and the filter layer 32 is fixedly connected to the dust collection box 3. The multiple dust collection boxes 3 are connected in parallel to each other and are connected to the air inlet duct 2 through a pipe. The multiple air distributors 4 are installed on the pipe between the multiple dust collection boxes 3 and the air inlet duct 2 to control the degree of connection between the dust collection boxes 3 and the air inlet duct 2.

[0023] The air distributor 4 includes a motor 41 and an air distribution plate 42 connected to each other. The motor 41 is fixedly connected to the pipe, and the air distribution plate 42 is located inside the pipe. The air distribution plate 42 is a quarter-sphere.

[0024] There are three dust collectors 3 and three air distributors 4, namely a first dust collector, a second dust collector, a third dust collector, a first air distributor, a second air distributor, and a third air distributor. A right-angle tee pipe is provided between the first dust collector and the air inlet duct 2. The right-angle tee pipe includes an upper pipe opening and a lower pipe opening located on the same straight line, as well as a side pipe opening perpendicular to the upper pipe opening. The first dust collector and the air inlet duct 2 are respectively connected to the upper pipe opening and the lower pipe opening. The side pipe opening is connected to the terminal sealed branch duct. The second dust collector and the third dust collector are respectively connected to the side wall of the branch duct. The first air distributor is located at the center of the right-angle tee pipe and can control the opening and closing of the side outlet of the right-angle tee pipe. The second air distributor is located at the connection between the second dust collector and the side wall of the branch duct and can control the connection between the two. The third air distributor is located at the connection between the third dust collector and the side wall of the branch duct and can control the connection between the two.

[0025] The Venturi tube assembly 31 is made of stainless steel. In the high-humidity environment of coal mines, stainless steel effectively blocks the corrosion of moisture and acidic media, preventing structural strength reduction or failure caused by rusting of ordinary carbon steel. 316L stainless steel can be used. The wear-resistant layer is made of tungsten carbide, which has high hardness, excellent wear resistance, good corrosion resistance, and stable chemical properties. The filter layer 32 includes a first filter layer 321 and a second filter layer 322.

[0026] The first filter layer 321 has a stainless steel wire outer surface and Pall rings as the internal filler, while the second filter layer 322 is an activated carbon fiber felt layer. The large specific surface area of ​​the Pall rings provides more contact and adhesion sites for dust particles, thereby improving the interception efficiency of fine particles. The high porosity and unique window structure of the Pall rings allow dust or droplets that have accumulated on the filler surface to more easily slide off to the lower layer or collection area due to gravity or airflow scouring, preventing excessive clogging of the filler surface and maintaining long-term stable filtration performance.

[0027] The annular atomizing nozzle 33 is located at the inlet of the dust collector 3, and its blowing direction is towards the venturi tube assembly 31. The annular atomizing nozzle 33 is fixedly connected to the inner wall of the inlet pipe by a metal bracket, providing stable support.

[0028] The annular atomizing nozzle 33 is a coaxial dual-channel annular nozzle, comprising an inner ring 331, an outer ring 332, and multiple atomizing nozzles. The inner ring 331 is a liquid channel connected to an external water supply pipe, on which a water pump WP2 is installed. The outer ring 332 is a gas channel connected to an external air supply pipe, on which an air pump WP1 is installed. Multiple atomizing nozzles are evenly distributed between and connected to the inner ring 331 and the outer ring 332. The two-phase fluids interact at the outlet of the atomizing nozzles before being ejected. Gas can pass between the atomizing nozzles, which, for directional tubular airflow, can uniformly increase the humidity of the airflow, aiding in the dust suppression process of the Venturi tube assembly 31.

[0029] The dust collection box 3 is equipped with a sewage discharge pipe 34 at the bottom. The sewage discharge pipe 34 is connected to an external sewage discharge device for discharging wastewater. The external sewage discharge device includes a sewage pump WP3.

[0030] The dust collection box 3 extends inward and is provided with a pair of mounting frames 35. The left and right ends of the venturi tube assembly 31 are elastically connected to the pair of mounting frames 35.

[0031] The venturi tube assembly 31 and the mounting frame 35 are elastically connected by a pin 36 and a buffer spring 37. The pin 36 is connected at both ends to the mounting frame 35 and the venturi tube assembly 31, respectively. The buffer spring 37 is sleeved on the middle section of the pin 36 located between the mounting frame 35 and the venturi tube assembly 31, with both ends in contact with the mounting frame 35 and the venturi tube assembly 31. The venturi tube assembly 31 can slide along the pin 36. One end of the pin 36 has a fixing block for locking and limiting, and the other end has a radial through hole. After this end passes through the component to be connected, a cylindrical pin passes through the radial through hole and engages with the component to be connected.

[0032] The working principle of this invention is as follows: When the dust removal demand is small, only one dust collector is connected to the air inlet duct 2. The fan 1 operates at low power, generating negative pressure to draw dust-laden gas into the dust collector 3 through the air inlet duct 2. At the inlet of the dust collector 3, the dust-laden gas interacts with the high-pressure water mist generated by the atomizing nozzle 33 and then enters the Venturi tube assembly 31. When the Venturi tube assembly 31 is impacted by the dust-laden gas, it slides along the pin 36 while compressing the buffer spring 37 to reduce the impact. The dust-laden gas in the Venturi tube assembly 31 is affected by the Venturi effect. The gas is drawn in with water and dust through a secondary speed-up and pressure-reduction process. The resulting wastewater falls to the bottom of the dust collector 3 and is discharged through the sewage pipe 34. The gas is then filtered through the first filter layer 321 and the second filter layer 322 before being discharged into the coal mine roadway, thus completing the purification and circulation of dust-laden gas in the roadway. When the dust removal demand is high, multiple air distributors are adjusted to connect the air inlet pipe 2 with multiple dust collectors 3, increasing the power of the fan 1. By using multiple structures together, the dust removal efficiency is increased, and the purification and circulation of dust-laden gas in the roadway is achieved efficiently.

[0033] The present invention can realize the adjustment and control of the entire system by setting up a control box that is electrically connected to the fan 1 and multiple motors 41, or by adding a PLC and matching it with dust-containing gas detection sensors to realize the automatic detection and automatic adjustment of the working status of the entire system.

[0034] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A coal mine roadway integrated dry and wet dust removal system, characterized in that: The device includes a fan (1), an air inlet pipe (2), and a dust removal device connected in sequence. The dust removal device is equipped with a venturi tube assembly (31) and a filter layer (32). The surface of the venturi tube assembly (31) is provided with a wear-resistant layer, and the venturi tube assembly (31) is elastically connected to the dust removal device to absorb impact. The filter layer (32) is fixedly connected to the dust removal device. An annular atomizing nozzle (33) is provided at the inlet of the dust removal device. The dust removal device includes multiple dust collection boxes (3) and multiple air distributors (4). The dust collection box (3) has a cylindrical structure. The Venturi tube assembly (31) and the filter layer (32) are both located inside the dust collection box (3). The Venturi tube assembly (31) is elastically connected to the dust collection box (3), and the filter layer (32) is fixedly connected to the dust collection box (3). The multiple dust collection boxes (3) are connected in parallel to each other and are connected to the air inlet pipe (2) through a pipe. The multiple air distributors (4) are set on the pipe between the multiple dust collection boxes (3) and the air inlet pipe (2) to control the degree of connection between the dust collection boxes (3) and the air inlet pipe (2).

2. The integrated dry and wet dust removal system for coal mine roadways according to claim 1, characterized in that: The air distributor (4) includes a motor (41) and an air distribution plate (42) connected to each other. The motor (41) is fixedly connected to the pipe, and the air distribution plate (42) is located inside the pipe. The air distribution plate (42) is a quarter-sphere.

3. The integrated dry and wet dust removal system for coal mine roadways according to claim 1, characterized in that: The venturi tube assembly (31) is made of stainless steel, the wear-resistant layer is made of tungsten carbide, and the filter layer (32) includes a first filter layer (321) and a second filter layer (322).

4. The integrated dry and wet dust removal system for coal mine roadways according to claim 3, characterized in that: The first filter layer (321) has a stainless steel wire exterior and a Pall ring interior filler, while the second filter layer (322) is an activated carbon fiber felt layer.

5. The integrated dry and wet dust removal system for coal mine roadways according to claim 1, characterized in that: The annular atomizing nozzle (33) is located at the inlet of the dust collector (3) and its blowing direction is towards the venturi tube assembly (31).

6. The integrated dry and wet dust removal system for coal mine roadways according to claim 5, characterized in that: The annular atomizing nozzle (33) is a coaxial dual-channel annular nozzle. The inner ring (331) is a liquid channel connected to an external water supply pipe, and the outer ring (332) is a gas channel connected to an external gas supply pipe.

7. The integrated dry and wet dust removal system for coal mine roadways according to claim 5, characterized in that: The dust collector (3) is equipped with a sewage pipe (34) at the bottom, which is connected to an external sewage discharge device for discharging wastewater.

8. The integrated dry and wet dust removal system for coal mine roadways according to claim 1, characterized in that: The dust collection box (3) extends inward and is provided with a pair of mounting frames (35), and the left and right ends of the venturi tube assembly (31) are elastically connected to the pair of mounting frames (35).

9. A coal mine roadway integrated dry and wet dust removal system according to claim 8, characterized in that: The venturi tube assembly (31) and the mounting frame (35) are elastically connected by a pin (36) and a buffer spring (37). The two ends of the pin (36) are connected to the mounting frame (35) and the venturi tube assembly (31) respectively. The buffer spring (37) is sleeved on the middle section of the pin (36) located between the mounting frame (35) and the venturi tube assembly (31). The two ends of the buffer spring (37) are in contact with the mounting frame (35) and the venturi tube assembly (31) respectively. The venturi tube assembly (31) can slide along the pin (36).

Images