Dust removal control system for driving working face with cooperation of rotational flow air curtain and negative pressure air draft

Abstract

The invention discloses a control dust removal system for a driving working face with a rotational flow air curtain cooperating with negative pressure air draft, and relates to the field of dust removal, the control dust removal system comprises a press-in fan, an air pressing barrel, a telescopic rotational flow air supply outlet, a telescopic dust collection cover, an air draft barrel and a dry dust removal fan; the press-in fan and the air pressing barrel are hung at the top of the central position of the tunneling roadway, the telescopic rotational flow air supply outlet is formed in an outlet of the air pressing barrel, and the horizontal distance between the telescopic rotational flow air supply outlet and the section of the tunneling working face is about 10-20 m. The problems of low operation efficiency and energy consumption increase of a ventilation and dust prevention system of the driving working face can be prevented, and the phenomenon that dust further pollutes underground airflow and other workplaces can be prevented; the air pressing barrel is adopted to generate a rotational flow air curtain to control dust on the driving face, meanwhile, the air draft barrel and the dry type dust removal fan are cooperated to capture and purify the dust, and purified dust-containing airflow can enter an underground ventilation system for circulating ventilation.

Description

Technical Field

[0001] This invention relates to the field of dust removal, and more specifically, to a dust removal control system for tunneling faces that combines a swirling air curtain with negative pressure ventilation. Background Technology

[0002] Tunneling faces are typical dust-generating sites, and ventilation and dust removal have always been the most basic dust control measures at tunneling faces. Their main functions are: first, to force in fresh airflow and provide sufficient oxygen for workers; second, to dilute toxic and harmful gases; and third, to disperse and dilute suspended dust. Domestic scholars have conducted relatively more research on ventilation and dust removal, and their research has shown that long-pressure short-extraction ventilation and dust removal is more effective than forced-in ventilation and dust removal, and can accelerate the dust removal speed. However, ventilation and dust removal is weak, and secondary dust generation is serious. Dust-laden airflow can pollute the entire working space when it flows backward. Therefore, ventilation and dust removal usually need to be supplemented by other dust removal methods. Current auxiliary ventilation and dust removal measures include wet drilling, spray dust suppression, dry drilling dust collection, dry fog dust suppression, and physical and chemical dust control. However, practice shows that metal mine ventilation systems are becoming increasingly complex, and stope ventilation and dust removal cannot meet requirements. Spraying is ineffective at reducing fine dust; chemical dust suppressants are costly and have significant side effects; wet and dry drilling dust collection methods cannot completely and effectively capture dust at the borehole opening. Because the control of dust sources and the collection of dust at the tunneling face have not yet been well resolved, the ventilation and dust removal effect at the tunneling face remains unsatisfactory. Therefore, to address these shortcomings, this invention develops a control and dust removal system for tunneling faces that combines a swirling air curtain with negative pressure ventilation. Summary of the Invention

[0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide a method that can achieve efficient mine ventilation and dust removal by utilizing negative pressure.

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A dust control system for tunneling face with swirling air curtain and negative pressure exhaust includes a forced air blower (1), a compressed air duct (2), a retractable swirling air outlet (3), a retractable dust collection hood (4), an exhaust duct (5), and a dry dust removal fan (6).

[0006] Furthermore, the compressed air fan (1) and the compressed air cylinder (2) are suspended at the top of the center of the tunnel. The outlet of the compressed air fan 1 is connected to the bottom of the compressed air cylinder 2 through a flange. A retractable swirl air outlet (3) is installed at the air outlet of the compressed air cylinder (2) by a flange connection. The retractable swirl air outlet (3) is about 10-20m away from the cross-section of the tunneling working face.

[0007] Furthermore, the exhaust duct (5) is suspended and installed on the downwind side wall of the tunnel ventilation airflow. The installation height of the exhaust duct (5) is the height of the breathing zone. The inlet of the exhaust duct (5) is fixedly connected to the retractable dust collection hood (4) through a flange. The outlet of the exhaust duct (5) is fixedly connected to the dry dust removal fan (6) through a flange. The retractable dust collection hood (4), the exhaust duct (5), and the dry dust removal fan (6) constitute a negative pressure exhaust purification system for the tunneling face. The retractable dust collection hood (4) is about 2-5m away from the cross-section of the tunneling face.

[0008] Furthermore, the dust in the tunneling face forms an air curtain for dust removal through the pressurized blower (1), the air compressor (2), and the retractable swirl air outlet (3). The air curtain is used to guide the dust-laden airflow in the partition wall to the dry dust removal fan 6. The dry dust removal fan 6 generates a negative pressure suction effect, and the dust-laden airflow enters the dry dust removal fan 6 for purification after passing through the retractable dust collection hood 4 and the exhaust duct 5 before being discharged into the roadway.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: This solution boasts advantages such as reliable system operation and high stability, preventing issues like low operating efficiency and increased energy consumption in the ventilation and dust control system at the tunneling face, as well as further pollution of underground airflow and other work areas by dust. It employs a compressed air duct to generate a swirling air curtain to control dust at the tunneling face, while simultaneously using an exhaust duct and a dry dust collector to capture and purify dust. The purified dust-laden airflow can then circulate within the underground ventilation system, effectively improving the airflow utilization efficiency of the mine ventilation system. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the plan layout of a dust control system for a tunneling face with swirling air curtain and negative pressure ventilation according to the present invention. Figure 2 This is a schematic diagram of the vertical layout of the ventilation duct at the tunneling face of the present invention.

[0011] Explanation of the labels in the diagram: 1. Forced air blower; 2. Air compressor duct; 3. Retractable swirl air outlet; 4. Retractable dust collection hood; 5. Exhaust duct; 6. Dry dust collector fan. Detailed Implementation

[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0013] Please see Figures 1 to 2A schematic diagram of the layout of a dust control system for a tunneling face, featuring a swirling air curtain combined with negative pressure ventilation. Figure 2 The schematic diagram of the ventilation duct layout at the tunneling face of this invention shows that it is composed of a forced air blower 1, a compressed air duct 2, a retractable swirl air inlet 3, a retractable dust collection hood 4, an exhaust duct 5, and a dry dust removal fan 6. The forced air blower 1 and the compressed air duct 2 are suspended from the top at the center of the tunnel. The retractable swirl air inlet 3 is installed at the outlet of the compressed air duct 2, and the horizontal distance between the retractable swirl air inlet 3 and the tunneling face cross-section is approximately 10-20m. The outlet of the forced air blower 1 is... The compressed air duct 2 and its outlet are connected to the retractable swirl air outlet 3 by flanges. The exhaust duct 5 is suspended on the downwind side wall of the tunnel ventilation airflow. The exhaust duct 5 is installed at the breathing zone height. The inlet and outlet of the exhaust duct 5 are respectively equipped with a retractable dust collection hood 4 and a dry dust removal fan 6. The retractable dust collection hood 4 is about 2-5m away from the cross-section of the tunnel working face. The exhaust duct 5 is connected to the retractable dust collection hood 4 and the dry dust removal fan 6 by flanges.

[0014] Fresh air from the mine is delivered to the working face via a compressed air fan 1 and compressed air duct 2 suspended at the top of the tunnel, and then through a retractable vortex air inlet 3. Since the compressed air duct 2 is located at the center of the tunnel roof, the retractable vortex air inlet 3 has the ability to deliver a rotating jet and induce surrounding airflow. After being ejected from the retractable vortex air inlet 3, the fresh air flows downwards at a certain rotational speed, covering the entire cross-section of the tunnel and forming an air curtain that continuously advances towards the working face. The dust-laden airflow within the air curtain is then purified by the negative pressure suction of the dry dust collector fan 6, passing through a retractable dust collection hood 4 and an exhaust duct 5 before being discharged into the tunnel.

[0015] The retractable swirl air inlet 3 and the retractable dust collection hood 4 can move as the working face advances, and the entire ventilation and dust removal system can fully adapt to the advancement of the tunneling face without having to lengthen the air compressor 2 and the exhaust duct 5 to meet the requirements of air supply and exhaust.

[0016] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A control dust removal system of a tunneling face cyclone air curtain cooperated with negative pressure exhaust, comprising a pressure fan (1), a pressure air cylinder (2), a telescopic cyclone air outlet (3), a telescopic dust collection cover (4), an exhaust cylinder (5) and a dry dust removal fan (6).

2. The control dust removal system of the tunneling face cyclone air curtain and negative pressure exhaust air cooperation according to claim 1, characterized in that: The pressure fan (1) and the pressure air cylinder (2) are hung at the top of the center position of the tunneling roadway, the outlet of the pressure fan (1) is connected to the bottom end of the pressure air cylinder (2) through a flange, the telescopic cyclone air outlet (3) is installed at the air outlet of the pressure air cylinder (2) through a flange connection, and the telescopic cyclone air outlet (3) is about 10-20 m away from the horizontal distance of the tunneling face section.

3. The control dust removal system of a tunneling face cyclone air curtain and negative pressure exhaust air cooperation according to claim 2, characterized in that: The exhaust cylinder (5) is hung and installed on the wall surface on the downwind side of the ventilation airflow of the tunneling roadway, the installation height of the exhaust cylinder (5) is the height of the breathing zone, the inlet of the exhaust cylinder (5) is fixedly connected with the telescopic dust collection cover (4) through a flange, the outlet of the exhaust cylinder (5) is fixedly connected with the dry dust removal fan (6) through a flange, the telescopic dust collection cover (4), the exhaust cylinder (5) and the dry dust removal fan (6) form a negative pressure exhaust purification system of the tunneling face, and the telescopic dust collection cover (4) is about 2-5 m away from the horizontal distance of the tunneling face section.

4. The control dust removal system of a tunneling face cyclone air curtain and negative pressure exhaust air cooperation according to claim 3, characterized in that: The dust of the tunneling face passes through the pressure fan (1), the pressure air cylinder (2) and the telescopic cyclone air outlet (3) to form an air curtain for dust removal, the air curtain is used for guiding the dust-containing airflow in the partition wall to the dry dust removal fan (6), the dry dust removal fan (6) generates a negative pressure suction effect, the dust-containing airflow enters the dry dust removal fan (6) through the telescopic dust collection cover (4) and the exhaust cylinder (5), is purified and then is discharged into the roadway.

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