A three-stage dust removal device for rapid mining

Abstract

This utility model discloses a three-stage dust removal device for rapid excavation in mining, relating to the field of roadway dust removal technology. It comprises a primary dust removal zone, a secondary dust removal zone, and a tertiary dust removal zone, with the dust removal sequence sequentially passing through these zones. The primary dust removal zone is equipped with a wet dust removal fan, the secondary dust removal zone is equipped with a full-section spray device and a dustproof net, and the tertiary dust removal zone is equipped with a dry dust removal fan. The wet dust removal fan actively draws in high-concentration dust from the working face for primary physical filtration and water mist capture. The dust then passes through a combination of full-section spray and dustproof net to achieve moist settling and wastewater diversion, intercepting escaped dust. Finally, the dry dust removal fan provides ultimate purification of residual micro-dust before discharging clean airflow. This effectively reduces dust in the working face and subsequent roadways, ensuring a safe working environment and significantly reducing the occupational hazards associated with coal dust.

Description

Technical Field

[0001] This utility model relates to the field of tunnel dust removal technology, specifically a three-stage dust removal device for rapid excavation in mining. Background Technology

[0002] During intelligent and rapid tunneling in semi-coal-rock roadways, cutting coal and rock mass generates high-concentration mixed dust (coal dust accounting for 40%-60%, rock dust SiO2 content >15%), with the total dust concentration at the working face often exceeding 1000 mg / m³. 3 Of these, respirable dust accounts for 30%, seriously threatening the respiratory health of employees (leading to a surge in the risk of silicosis); at the same time, dust accumulation in the roadway is difficult to remove, with a coal dust deposition thickness of 3-5 mm. When exposed to high-temperature mechanical sparks or electrostatic discharge, there is a significant safety hazard of coal dust explosion. Therefore, this application proposes a three-stage dust removal device for mining fast excavation to solve the above problems. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In view of the shortcomings of the existing technology, this utility model provides a three-stage dust removal device for rapid mining, which solves the technical problems mentioned in the background.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a three-stage dust removal device for rapid mining, comprising a primary dust removal zone, a secondary dust removal zone and a tertiary dust removal zone, wherein the dust removal sequence passes through the primary dust removal zone, the secondary dust removal zone and the tertiary dust removal zone in sequence;

[0007] The primary dust removal zone is equipped with a wet dust removal fan, the secondary dust removal zone is equipped with a full-section spray device and a dustproof net, and the tertiary dust removal zone is equipped with a dry dust removal fan.

[0008] Preferably, a water collection trough is provided on the bottom side of the full-section spray device and the dustproof net.

[0009] Preferably, the air inlet of the wet dust collector is connected to a duct corresponding to the working face of the roadway.

[0010] Preferably, the water collection tank is equipped with a blower for pumping and discharging the dusty wastewater spray to a designated location.

[0011] Preferably, the airflow purified by the dry dust collector is discharged into the roadway through a clean air duct.

[0012] (III) Beneficial Effects

[0013] The beneficial effects of this utility model are as follows:

[0014] This type of mining rapid excavation three-stage dust removal device actively draws in high-concentration dust from the working face through a wet dust collector fan for primary physical filtration and water mist capture. Then, a combination of full-section spraying and dustproof netting achieves wet settling and wastewater diversion, intercepting escaped dust. Finally, a dry dust collector fan performs ultimate purification of residual micro-dust before discharging clean airflow. This effectively reduces dust in the working face and rear tunnel coal and rock, ensuring a safe working environment and effectively reducing the occupational hazards of coal and rock dust. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1 Primary dust removal zone, 2 Secondary dust removal zone, 3 Tertiary dust removal zone, 4 Wet dust removal fan, 5 Full-section spray device, 6 Dustproof net, 7 Water collection tank, 8 Dry dust removal fan, 9 Air duct, 10 Air pump. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] like Figure 1 As shown, this utility model provides a technical solution: a three-stage dust removal device for rapid mining, comprising a primary dust removal zone 1, a secondary dust removal zone 2 and a tertiary dust removal zone 3, wherein the dust removal sequence passes through the primary dust removal zone 1, the secondary dust removal zone 2 and the tertiary dust removal zone 3 in sequence.

[0019] The primary dust removal zone 1 is equipped with a wet dust removal fan 4. The air inlet of the wet dust removal fan 4 is connected to a ventilation duct 9 corresponding to the working face of the roadway. When the wet dust removal fan 4 is turned on, the dust-laden airflow from the tunneling head is drawn in through the negative pressure ventilation duct 9. The ventilation duct 9 is 8-12m away from the working face. The operation of the wet dust removal fan 4 generates suction, drawing in the dust-laden air through the ventilation duct 9. The fan is equipped with a spray device that sprays out a fine water mist. The dust-laden airflow mixes with the water mist, and the dust particles become heavier after being moistened and fall with the water flow. Most of the dust in the air is effectively removed, and the purified air is discharged under the action of the fan. The secondary dust removal zone 2 is equipped with a full-section spray device 5 and a dustproof net 6. A water collection tank 7 is installed on the bottom side of the full-section spray device 5 and the dustproof net 6. The water collection tank 7 is equipped with a wind pump 10 to suck up the dust-laden wastewater and discharge it to a designated location. When the escaped dust enters the secondary zone, the full-section spray device is triggered. 5. High-pressure spraying (pressure ≥ 8MPa): High-pressure water flows through the nozzle and is atomized into fine water mist particles. The water mist mixes with the dust particles, and the water mist envelops the dust, making it wet and heavier, reducing its suspension capacity in the air and accelerating its settling. At the same time, the dustproof net 6 has the functions of dust reduction and droplet blocking. After passing through the dustproof net 6, the sprayed dirty water flows along the dustproof net 6 to the bottom water collection tank 7. The sewage in the water collection tank 7 is pumped out to the sedimentation tank by the air pump 10 (automatically starts and stops every 2 hours). The three-stage dust removal zone 3 is equipped with a dry dust removal fan 8. The final residual dust is captured by the filter cartridge of the dry dust removal fan 8. The filter cloth inside the dry dust removal fan 8 filters the dust-laden airflow and captures the dust on the outer surface of the filter cloth. After the dust-laden airflow enters the dirty air duct, it is all evenly attached to all the filter cloths in the filter chamber. The purified airflow is discharged to the clean air duct. The purified airflow from the dry dust removal fan 8 is discharged to the roadway through the clean air duct.

[0020] The operational steps for this application are as follows:

[0021] Turn on the wet dust collector fan 4 to draw in the dust-laden airflow from the tunneling head through the negative pressure duct 9, with the duct 9 8-12m away from the working face. Simultaneously start the dry dust collector fan 8 to establish a three-stage dust collection negative pressure gradient. When the escaping dust enters the secondary zone, the full-section spray device 5 is triggered to spray high-pressure water (pressure ≥8MPa). The high-pressure water flows through the nozzles and is atomized into fine water mist particles. The water mist mixes with the dust particles, enveloping the dust, making it wet and heavier, reducing its suspension capacity in the air, and accelerating its settling. At the same time, the dust net 6 is installed. It has the functions of dust reduction and mist droplet blocking. After passing through the dustproof net 6, the sprayed dirty water flows along the dustproof net 6 to the bottom water collection tank 7. The sewage in the water collection tank 7 is pumped out to the sedimentation tank by the air pump 10. Finally, the residual micro dust is captured by the filter cartridge of the dry dust collector fan 8. The filter cloth in the dry dust collector fan 8 filters the dust-laden airflow and captures the dust on the outer surface of the filter cloth. After the dust-laden airflow enters the dirty air duct, it is all evenly attached to all the filter cloths in the filter chamber. The purified airflow is discharged to the clean air duct and finally the clean airflow is discharged from the exhaust port of the fan.

[0022] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mine fast digging three-stage dust removal device, characterized in that: It consists of a primary dust removal zone (1), a secondary dust removal zone (2) and a tertiary dust removal zone (3), and the dust removal sequence passes through the primary dust removal zone (1), the secondary dust removal zone (2) and the tertiary dust removal zone (3) in sequence; The primary dust removal zone (1) is equipped with a wet dust removal fan (4), the secondary dust removal zone (2) is equipped with a full-section spray device (5) and a dustproof net (6), and the tertiary dust removal zone (3) is equipped with a dry dust removal fan (8).

2. The three-stage dust removal device for rapid tunneling in mines according to claim 1, characterized in that: The bottom side of the full-section spray device (5) and the dust net (6) is provided with a water collection tank (7).

3. The three-stage dust removal device for rapid tunneling in mines according to claim 2, characterized in that: The air inlet of the wet dust collector (4) is connected to the air duct (9) corresponding to the roadway working face.

4. The three-stage dust removal device for rapid tunneling in mines according to claim 3, characterized in that: The water collection tank (7) is equipped with a blower (10) for pumping dusty sewage and discharging it to a designated location.

5. The three-stage dust removal device for rapid tunneling in mines according to claim 4, characterized in that: The purified airflow from the dry dust removal fan (8) is discharged into the roadway through the clean air duct.

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