CN114517705A - Single-head roadway gas-fog two-phase flow control dust settling system and method - Google Patents
Single-head roadway gas-fog two-phase flow control dust settling system and method Download PDFInfo
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- CN114517705A CN114517705A CN202210145178.XA CN202210145178A CN114517705A CN 114517705 A CN114517705 A CN 114517705A CN 202210145178 A CN202210145178 A CN 202210145178A CN 114517705 A CN114517705 A CN 114517705A
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- 230000005514 two-phase flow Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003595 mist Substances 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims abstract description 14
- 238000007664 blowing Methods 0.000 claims abstract description 9
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- 230000009471 action Effects 0.000 claims description 9
- 239000000443 aerosol Substances 0.000 claims description 9
- 230000005641 tunneling Effects 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 206010010904 Convulsion Diseases 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 230000036461 convulsion Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000030279 gene silencing Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention relates to a single-head roadway gas-fog two-phase flow control dust-settling system and method, and belongs to the field of heading face roadway dust-settling. The invention adds a guide wind cylinder at the end of a pressure wind cylinder to change the wind flow from radial blowing to blowing along the air outlet on the guide wind cylinder, and utilizes the wall attachment effect of the air flow to generate an air curtain which is parallel to the cross section of the roadway and spirally propels to a closed section, and a plurality of cloud spray nozzles are respectively arranged at two sides of the air outlet of the guide wind cylinder to spray cloud clusters with electric charges and particle diameters less than 15 microns, and the cloud clusters are wrapped by the air curtain to form a gas-mist two-phase flow curtain which propels to a closed working surface along the cross section of the roadway. The air-mist two-phase flow curtain formed by the invention has stable air flow distribution, does not blow away dust by rapid air flow, converges and interacts the dust and mist in the process of continuous propulsion so as to settle, uses little water for the mist spray head, avoids the severe environment of high dust and high humidity of a roadway, and greatly improves the operation environment of equipment and workers.
Description
Technical Field
The invention belongs to the field of dust fall of a roadway of a driving face, and relates to a gas-mist two-phase flow control dust fall method for a single-head roadway.
Background
The tunnel construction or the underground excavation face tunneling can form a single-end tunnel, a large amount of rock and coal dust is generated along with the propulsion of a working face, a long-distance air cylinder is needed to supply fresh air flow with large air quantity to blow to a plugging section for providing fresh air for operators and preventing the plugging section from accumulating toxic and harmful gases, and the displaced dirty air is pumped out of the tunnel through a negative pressure air cylinder. According to the forced ventilation mode, during air supply, a large airflow is directly blown to the blocking section and is subjected to the interception and rebound effects of the section and equipment to form turbulent flows with different speed directions and different wind speeds, dust is wrapped by the turbulent airflow and is diffused to all places of a roadway at a high speed, and the requirement of normal work of workers is far met by means of local air draft and dust exhaust of one air duct. The working face environment is extremely harsh, objects cannot be seen, particularly the physical health of an operator is seriously harmed, dust control and reduction treatment must be carried out, and otherwise, the working face environment cannot work.
The current common dust fall mode mainly comprises spraying water for dust fall or adopts matching of a wind control device and a dust removal device to solve the dust problem of a single-head tunnel, but the former generally adopts a water spray nozzle for water spraying and dust fall, the water consumption is very large, the humidity of a working surface is easy to exceed the standard, a sensing and monitoring device fails, the dust fall efficiency is not high, if a cloud spray nozzle with extremely small water spraying amount is adopted, under the condition that air flow of a compressed air cylinder directly blows to a blocking section and is blocked and rebounded by the section and equipment, turbulent flow with different speed directions and wind speeds is formed, and dust is wrapped by turbulent air flow and diffused to all places of the tunnel at an extremely high speed, cloud clusters generated by the cloud spray nozzle cannot meet the dust fall effect in the tunnel at all; the air control and dust removal device has good dust control and removal effects, but has the problems of large occupied area, high water and power consumption, high noise and the like, and causes inconvenience for workers to operate and discomfort in body feeling.
Therefore, a dust control system and a dust control method which are good in dust control effect and low in water and power consumption are urgently needed at present, so that the problems of high dust and high humidity in a roadway are solved, and the working environment of construction equipment and workers is improved.
Disclosure of Invention
In view of this, the present invention aims to provide a single-head tunnel gas-mist two-phase flow control dust settling system and method, which can reduce dust and humidity of the tunnel and improve the working environment of workers.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a double-phase flow control dust fall system of single-ended lane gas-fog, is including the pressure wind section of thick bamboo that is used for providing the new trend and the convulsions section of thick bamboo that is used for convulsions, its characterized in that: including guide air duct and cloud and mist shower nozzle, press the dryer for attaching the wall dryer, the guide air duct includes dryer body, toper guide cylinder and dryer support, the dryer body is placed subaerial in the tunnel through the dryer support, and the dryer is pressed in the one end connection, and the other end seals, and its upper portion is equipped with the air outlet, the coaxial setting of toper guide cylinder is at this internal and big footpath end connection of toper guide cylinder of dryer at the blind end of dryer body, blow off along the air outlet of dryer body in order to realize pressing the income wind from the direct-blow working face direction.
The wind tube body is provided with a plurality of cloud and mist nozzles on two sides of the wind outlet, the inlets of the cloud and mist nozzles are connected with a water supply pipeline, and the wind suction tube is arranged in the middle of a roadway.
Furthermore, a filtering device is arranged on the water supply pipeline to ensure smooth water supply of the cloud and mist nozzle.
Furthermore, the sound attenuation cotton is filled in the conical guide cylinder.
Furthermore, the air outlet adopts a slope mouth structure expanding towards two sides.
Further, an air outlet width adjusting device is arranged on the air outlet and is a plurality of bolts uniformly distributed on the air outlet.
The invention also provides a single-head roadway gas-fog two-phase flow control dust settling method based on the gas-fog two-phase flow control dust settling system, which comprises the following steps:
a. fresh air flow in the air pressing cylinder is changed from the direction of a direct blowing working surface to an air outlet above the air guiding cylinder to be blown out under the action of the air guiding cylinder, the air flow is changed into rotary motion along the cross section of the roadway under the action of a wall attachment effect, and the air flow is spirally propelled towards the direction of the tunneling surface of the roadway under the condition that the air pressing cylinder continuously supplies air to form a blocking air curtain parallel to the tunneling surface;
b. the cloud and mist nozzles are arranged on two sides of an air outlet on the guide air duct to generate cloud and mist with the particle size less than 15 microns and micro-charges, the air flow blown out from the air outlet is entrained with the cloud and mist to form an air-mist two-phase flow curtain rotating along the cross section of the roadway, and most of dust and mist particles form polymerized aerosol gel masses to sink down after the interaction of large-scale and long-time interception, collision, charge adsorption, infiltration and winding with dust in the air is generated in the process of spirally propelling the plugging section of the roadway;
c. Finally, a small part of dust, small aerosol clusters and dirty air which are not collected are pumped away by an air draft tube arranged in the middle area of the roadway.
The invention has the beneficial effects that:
1. the invention improves on the basis of the original air pumping and exhausting system of the tunnel, the tail end of the air pressing air cylinder is additionally provided with the guide air cylinder, the air flow is blown out from the radial direction to be blown out upwards along the air outlet arranged on the guide air cylinder, and an air curtain which is parallel to the cross section of the tunnel and is spirally pushed to the closed section is generated by utilizing the wall attachment effect of the air flow; the two sides of the air outlet of the guide air duct are respectively provided with a plurality of cloud spray heads, and cloud clusters with charges and particle sizes less than 15 microns are sprayed out, and the cloud clusters are wrapped by the air curtain to form gas-mist two-phase flow, and are pushed to the closed working surface along the section of the roadway; the dust generated by the construction of the closed section is not blown away by a rapid airflow any more, but is blocked and cannot escape in front of a continuously propelled gas-mist two-phase flow curtain, and is captured and collected by the actions of interception, collision, charge adsorption, infiltration and the like with micro-mist particles in the rotating mixed flow movement process of the dust and the gas-mist two-phase flow. The tiny liquid-solid aerosol is pumped out of the working surface by the dust pumping air duct, aerosol clusters with large volume and heavy weight are settled on the ground, and cannot float for the second time due to the adhesion of the aerosol clusters, so that the dust settling effect is excellent.
2. The invention adopts the air curtain generated by the guide air duct to wrap the cloud mist generated by the cloud mist spray head to form the air-mist two-phase flow curtain, achieves excellent dust fall effect and simultaneously only needs little water consumption, solves the dilemma that some high-precision instruments, instruments and intelligent equipment cannot normally work due to the severe environment of high dust and high humidity of the single-head tunnel, improves the application technology and level of automatic monitoring, monitoring and electric control equipment, realizes the intelligent construction operation of the single-head tunnel, ensures the safety of the automatic operation of mines and tunnels, improves the working environment of workers and saves great manpower and material resources.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.
Drawings
For a better understanding of the objects, aspects and advantages of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of the structure of the present invention 1;
FIG. 2 is a schematic view of the structure of the present invention 2;
FIG. 3 is a schematic structural view of a guide air duct 1;
FIG. 4 is a schematic structural diagram of a guide air duct 2;
FIG. 5 is a schematic cross-sectional view of the wind flow distribution of FIG. 1;
fig. 6 is a schematic sectional view of the wind flow distribution 2.
Reference numerals: 1-a water supply pipeline, 2-a wind pressing cylinder, 3-a guide wind cylinder, 4-a cloud and fog spray head, 5-a tunneling device, 6-a wind pumping cylinder, 7-a conical guide cylinder, 8-a wind cylinder body and 9-a wind outlet width adjusting device.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Example 1
Referring to fig. 1 to 4, the single-head tunnel gas-mist two-phase flow control dust settling system includes a pressure air duct 2, a guide air duct 3, a mist spray nozzle 4 and a suction air duct 6, wherein the pressure air duct 2 adopts a wall-attached air duct, an outlet end of the pressure air duct 2 is connected with the guide air duct 3 to guide the pressure air to blow out along the guide air duct 3 from a direct blowing working surface, and moves along with the propulsion of the working surface, and the suction air duct 6 is arranged in the middle area of the tunnel to suck a small part of dust, small aerosol clusters and dirty air which are not trapped.
The guide air duct 3 is made of stainless steel and comprises an air duct body 8, a conical guide air duct 7 and an air duct support, the air duct body is placed on the ground of a roadway through the air duct support, one end of the air duct body is connected with the pressure air duct 2, the other end of the air duct body is closed, a long and narrow air outlet is formed in the upper portion of the air duct body, the conical guide air duct 7 is coaxially arranged in the air duct body 8, and the large-diameter end of the conical guide air duct 7 is connected to the closed end of the air duct body 8 so as to guide the pressure air from a direct blowing working face to be blown out along the air outlet of the air duct body (8); the wind-facing end of the conical guide cylinder 7 adopts a guide cover made in a bullet head shape to reduce the resistance of wind flow.
The both sides of air outlet all are equipped with a plurality of cloud and fog shower nozzles 4, and water supply line 1 is connected to cloud and fog shower nozzle 4, be equipped with the spraying effect of precision filtering device in order to guarantee cloud and fog shower nozzle 4 on the water supply line 1, cloud and fog shower nozzle 4 is a device that can produce the particle diameter < 15 microns, have little electric charge's cloud and fog group, and the precision filtering device guarantee pipeline that is equipped with on its entry linkage's the water supply line is unblocked, and cloud and fog shower nozzle 4 can last work, and the water consumption of cloud and fog shower nozzle 4 is minimum, can not cause too big influence to the humidity in tunnel.
The draft tube 6 is arranged at the position of the center of the roadway, fresh air flow pressed in by the air pressing tube 2 is blown out from the direction of a direct blowing working face under the action of the guide air tube 3 and is changed into air outlet above the guide air tube 3, the air flow is changed into rotary motion along the cross section of the roadway under the action of an attaching wall effect, the air flow is spirally propelled towards the direction of a roadway driving face under the condition that the air pressing tube 2 continuously supplies air, a blocking air curtain parallel to the driving face is formed, the middle area is a low-speed area with weak air flow, the draft tube 6 is arranged in the middle area of the roadway, dust without settlement can be better pumped away, air flow circulation is accelerated, and ventilation circulation in the roadway is guaranteed.
Specifically, the noise generated by the wind flow during rapid reversing is weakened by filling silencing cotton in the conical guide cylinder 7, the air outlet adopts a slope opening structure with openings at two sides so as to be fully wrapped in cloud and mist clusters and simultaneously prevent dust from entering the cloud and mist sprayer 4, an air outlet width adjusting device 9 is arranged on the air outlet, the air outlet width adjusting device 9 is a plurality of bolts uniformly distributed on the air outlet, and the adjustment of the air outlet width can be realized by adjusting the tightness degree of the bolts, so that the air outlet width adjusting device is simple and reliable.
Example 2
The invention also provides a single-head roadway gas-fog two-phase flow control dust settling method, which comprises the following steps:
fresh air flow in the air pressing barrel 2 is changed into air outlet blow-out along the upper part of the air guiding barrel 3 from the direction of a direct blowing working face under the action of the air guiding barrel 3, upward and lateral air flow is changed into rotary motion along the cross section of the roadway under the influence of the side wall of the roadway due to the action of a wall attachment effect, and is spirally propelled towards the direction of the tunneling face of the roadway under the condition of continuous air supply to form a blocking air curtain parallel to the tunneling face, and the middle area is a low-speed area of weak air flow; the cloud mist nozzles 4 are arranged on two sides of an air outlet on the guide air duct 3 to generate cloud mist with the particle size less than 15 microns and micro-charges, the air flow blown out of the air outlet wraps the cloud mist to form an air-mist two-phase flow curtain rotating along the cross section of the roadway, and most of dust and mist particles form polymerized aerosol gel masses to sink down after the interaction of large-scale and long-time interception, collision, charge adsorption, infiltration and winding with dust in the air in the process of spirally propelling to the plugging section of the roadway; finally, a small part of the non-captured dust, small aerosol lumps and dirty air are uniformly sucked away by the suction cylinders 6 arranged in the middle area.
Referring to fig. 5 to 6, which are schematic diagrams of air flow distribution cross sections in a single-headed tunnel, the schematic diagram of air flow distribution cross sections shown in fig. 5 is an air flow condition detected under the condition that a pressing air cylinder is adopted to cooperate with a suction air cylinder in the prior art, in this press-in ventilation mode, when air is supplied, a very large air flow is directly blown to the blocked cross sections, and is subjected to interception and rebound effects of the cross sections and equipment, so that turbulent flows with different speed directions and wind speeds are formed, dust is wrapped by turbulent air flows and spread to various places of the tunnel at a very high speed, and the local air suction and dust removal of one air cylinder are only used, so that the requirement of normal work of workers is far not met, the working surface environment is extremely severe, objects cannot be seen, and the physical health of the operators is seriously damaged; the schematic cross-sectional air flow distribution diagram shown in fig. 6 is a schematic cross-sectional air flow distribution diagram obtained by detection after the air-mist two-phase flow control dust-settling system provided by the invention is used, and the air flow is stably and gradually propelled, so that no impact is caused to dust, and therefore, the dust can be guaranteed not to be blown away by the disordered air flow, and the dust can be gathered and settled by cloud and mist clusters, so that an excellent dust-settling effect is achieved, the water and electricity consumption is very low, and the purposes of dust settling and low humidity are achieved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a double-phase flow control dust fall system of one-end lane gas-fog, includes pressure wind section of thick bamboo (2) that are used for providing the new trend and an air draft section of thick bamboo (6) that are used for convulsions, its characterized in that: the forced air dryer comprises a guide air duct (3) and a cloud and mist spray head (4), wherein the forced air duct (2) is a wall-attached air duct, the guide air duct (3) comprises an air duct body (8), a conical guide air duct (7) and an air duct support, the air duct body (8) is placed on the ground of a roadway through the air duct support, one end of the air duct body is connected with the forced air duct (2), the other end of the air duct body is closed, an air outlet is formed in the upper part of the air duct body, the conical guide air duct (7) is coaxially arranged in the air duct body (8), and the large-diameter end of the conical guide air duct (7) is connected to the closed end of the air duct body (8) so as to guide forced air to be blown out along the air outlet of the air duct body (8) from a direct blowing working face;
A plurality of cloud and mist spray heads (4) are arranged on the two sides of the air outlet of the air duct body (8), and the inlets of the cloud and mist spray heads (4) are connected with the water supply pipeline (1).
2. The single-head roadway gas-mist two-phase flow control dust falling system according to claim 1, wherein: and a filtering device is arranged on the water supply pipeline (1).
3. The single-head roadway gas-mist two-phase flow control dust settling system of claim 1, wherein: and silencing cotton is filled in the conical guide cylinder (7).
4. The single-head roadway gas-mist two-phase flow control dust settling system of claim 1, wherein: the air outlet adopts a slope mouth structure expanding towards two sides.
5. The single-head roadway gas-mist two-phase flow control dust settling system of claim 1, wherein: an air outlet width adjusting device (9) is arranged on the air outlet, and the air outlet width adjusting device (9) is a plurality of bolts uniformly distributed on the air outlet.
6. A single-head lane gas-fog two-phase flow control dust settling method adopting the single-head lane gas-fog two-phase flow control dust settling system as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
a. fresh air flow in the air pressing barrel (2) is changed into air outlet blow along the upper part of the air guiding barrel (3) from the direction of a direct blowing working face under the action of the air guiding barrel (3), the air flow is changed into rotary motion along the cross section of the roadway under the action of a wall attachment effect, and the air flow is spirally propelled towards the direction of the tunneling face of the roadway under the condition that the air pressing barrel (2) continuously supplies air to form a blocking air curtain parallel to the tunneling face;
b. The mist spray heads (4) arranged at two sides of the air outlet on the guide wind cylinder (3) generate mist with particle size less than 15 microns and micro-charge, the air flow blown out from the air outlet entrains the mist to form an air-mist two-phase flow curtain rotating along the cross section of the roadway, and in the process of spirally propelling the blocking section of the roadway, after the interaction of large-scale and long-time interception, collision, charge adsorption, infiltration and winding with dust in the air, most of the dust and the mist form a polymerized aerosol group to sink down;
c. finally, a small part of dust which is not trapped, small aerosol lumps and dirty air are pumped out systematically through an air draft tube (6) arranged in the middle area of the roadway.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210145178.XA CN114517705A (en) | 2022-02-17 | 2022-02-17 | Single-head roadway gas-fog two-phase flow control dust settling system and method |
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| CN202210145178.XA CN114517705A (en) | 2022-02-17 | 2022-02-17 | Single-head roadway gas-fog two-phase flow control dust settling system and method |
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