CN115463499A - Self-air-suction foaming foam dust removal device and method for air return gallery of excavation working face - Google Patents
Self-air-suction foaming foam dust removal device and method for air return gallery of excavation working face Download PDFInfo
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- CN115463499A CN115463499A CN202211278126.6A CN202211278126A CN115463499A CN 115463499 A CN115463499 A CN 115463499A CN 202211278126 A CN202211278126 A CN 202211278126A CN 115463499 A CN115463499 A CN 115463499A
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- 239000006260 foam Substances 0.000 title claims abstract description 213
- 239000000428 dust Substances 0.000 title claims abstract description 73
- 238000005187 foaming Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000009412 basement excavation Methods 0.000 title description 6
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 238000007664 blowing Methods 0.000 claims abstract description 17
- 238000005065 mining Methods 0.000 claims abstract description 17
- 230000037452 priming Effects 0.000 claims abstract description 9
- 238000001802 infusion Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
- B01D47/021—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by bubbling the gas through a liquid bath
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2373—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/29—Mixing systems, i.e. flow charts or diagrams
- B01F23/291—Mixing systems, i.e. flow charts or diagrams for obtaining foams or aerosols
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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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- 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
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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
- E21F5/20—Drawing-off or depositing dust
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Nanotechnology (AREA)
- Dispersion Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model belongs to the technical field of remove dust, disclose from inhaling air foaming's mining working face return airway foam dust collector and method, including foam mixing chamber one and foam mixing chamber two, foam mixing chamber one has seted up foam mixed liquid inlet, foam mixed liquid inlet is connected with foam mixed liquid conveyor, the connector setting between foam mixing chamber one and the foam mixed liquid inlet is from big to little, a surface mounting of foam mixing chamber has the air self priming pump, be provided with the filter screen between foam mixing chamber one and the air self priming pump. According to the self-air-suction-foaming mining face return airway foam dust removal device and method, foam liquid conveying pipes are arranged on the upper portion of an airway and on the two lateral airway sides in an extending mode in a connected mode, foam mixed in a mixing chamber is blown out along the foam liquid conveying pipes through a blowing chamber, blown foam is evenly distributed on the cross section of the airway, dust in air of the airway is adsorbed, and the foam is intercepted through a dust catching net and then naturally settled.
Description
Technical Field
The disclosure belongs to the technical field of dust removal, and particularly relates to a self-suction air foaming foam dust removal device and method for a return airway of a mining working face.
Background
High-concentration dust can be generated on the underground coal face and the tunneling face of the coal mine in the operation process, and the dust not only influences the safety production of the coal mine, but also harms the occupational health of workers on the tunneling face. The method is characterized in that the dust is removed by adopting a water mist dust removal mode, a certain amount of water mist is mainly sprayed on the head, and the water mist covers dust to form full-section mist.
The foam dust removal device is mainly used for inhibiting dust from flying through the foam covering effect by spraying a certain amount of foam on the heading face of the heading face, and most of foam dust removal devices for the heading face mostly adopt a compressed air type foam production mode, compressed air contains a considerable amount of impurities such as solid particles and the like, and the impurities such as abrasive dust, rust slag and the like are continuously generated in an air compressor, so that the foam production rate is low.
Disclosure of Invention
The invention aims to provide a self-suction air foaming foam dust removal device and method for a return airway of a mining working face, and solves the problem of low foam production rate in the background technology.
The purpose of the disclosure can be realized by the following technical scheme:
from inhaling air frothing's mining working face return air gallery foam dust collector, including foam mixing chamber one and foam mixing chamber two, foam mixing liquid inlet has been seted up to foam mixing chamber one, foam mixing liquid inlet is connected with foam mixing liquid conveyor, the connector between foam mixing chamber one and the foam mixing liquid inlet sets up to by big to little, a foam mixing chamber surface mounting has the air self priming pump, be provided with the filter screen between foam mixing chamber one and the air self priming pump, two inner chambers of a foam mixing chamber up end and foam mixing chamber intercommunication, a foam mixing chamber terminal surface and blast chamber inner chamber intercommunication, two tops of foam mixing chamber are provided with the foam transfer line.
Preferably, be provided with supplementary mixing element in the foam mixing chamber two, supplementary mixing element sets up to mesh baffle assembly, mesh baffle assembly includes mesh circular baffle and mesh cowl, install the circular baffle of mesh between foam mixing chamber one and the foam mixing chamber two, the two inner chambers mid-mounting of foam mixing chamber have mesh cowl.
Preferably, a fan is installed in the blowing chamber.
Preferably, the second foam mixing chamber is in a circular truncated cone shape, the bottom of the circular truncated cone is fixedly connected with the top of the first foam mixing chamber, and the top of the circular truncated cone is fixedly connected with the foam infusion tube.
Preferably, the dust removing device further comprises a dust catching net which is arranged at the downstream of the dust removing device.
Preferably, the foam infusion tube is provided as a transparent hose.
Preferably, the dust removing device comprises a dust removing system, the dust removing system comprises a mixing unit, a blowing unit and a master control unit, the mixing unit is electrically connected with the foam mixing chamber, the blowing unit is electrically connected with the blowing chamber, and the master control unit is in communication connection with the mixing unit and the blowing unit.
Preferably, a pressure gauge is installed in the foam mixed liquid inlet, the pressure gauge is in communication connection with the master control unit, and the master control unit receives a pressure signal of the pressure gauge to control the air self-priming pump to work.
According to another aspect of the invention, the invention provides a self-air-suction foaming foam dedusting method for a return airway of a mining face, foam sprayed by a dedusting device is raised in the airway, dust in the airway is adsorbed, the foam is intercepted by a dust catching net, after the foam contacts the dust catching net, the foam is broken and naturally settled under gravity, and foam liquid conveying pipes are lengthened and arranged on the upper portion of the airway and on two sides of the airway.
The beneficial effect of this disclosure:
1. the foam mixed liquid conveying device and a connecting port of a foam mixing chamber are arranged to be from large to small, when foam mixed liquid enters the foam mixing chamber through a foam mixed liquid inlet, negative pressure is formed in the foam mixing chamber, air is automatically sucked through an air self-sucking pump, mixing of the foam mixed liquid and the air is completed in the mixing chamber, generated foam is blown out through a fan and is smashed through a mesh circular baffle and a mesh arc-shaped baffle and then is sprayed out along a foam liquid conveying pipe to adsorb dust in the air, the foam liquid conveying pipe is lengthened and arranged on the upper portion of a roadway and on two sides of a roadway side, the foam sprayed out along the foam liquid conveying pipe floats in the return airway after fully adsorbing the dust in the air, and the foam liquid conveying pipe automatically breaks after contacting a dust catching net, so that the dust in the air is removed.
2. This from inhaling air foaming's excavation working face return airway foam dust collector and method filters the impurity in the air through setting up the filter screen, smashes the big foam in foam mixing chamber one through setting up mesh circular baffle and mesh cowl, and the foam after smashing is more stable, is difficult to through self tension effect and quick breakage, has improved the foam quality.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic connection diagram of a mining working face return airway foam dust removal device based on self-suction air foaming and dust catching net according to an embodiment of the disclosure;
fig. 2 is a schematic view of the internal structure of a blast chamber of an embodiment of the present disclosure;
fig. 3 is a schematic connection diagram of a tunnel cross-section foam infusion tube according to an embodiment of the disclosure.
In the figure: 1. a foam mixed liquid inlet; 2. an air self-priming pump; 3. a pressure gauge; 4. a foam mixing chamber I; 5. a second foam mixing chamber; 6. a mesh circular baffle; 7. a mesh arc baffle; 8. a blast chamber; 9. a filter screen; 10. a foam infusion tube; 11. a master control unit; 12. a foam mixed liquid conveying device; 13. a dust catching net; 14. a fan.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
From inhaling air frothing's mining working face return air gallery foam dust collector, including foam mixing chamber one 4 and foam mixing chamber two 5, foam mixing liquid inlet 1 has been seted up to foam mixing chamber one 4, foam mixing liquid inlet 1 is connected with foam mixing liquid conveyor 12, the connector between foam mixing chamber one 4 and the foam mixing liquid inlet 1 sets up to be by big to little, foam mixing chamber one 4 outer surface mounting has air self priming pump 2, be provided with filter screen 9 between foam mixing chamber one 4 and the air self priming pump 2, foam mixing chamber one 4 up end and two 5 inner chambers of foam mixing chamber intercommunication, foam mixing chamber one 4 lower terminal surface and blast chamber 8 inner chambers intercommunication, two 5 tops of foam mixing chamber are provided with foam transfer line 10. In the return air roadway of the excavation working face, the foam mixed liquid conveying device 12 is started to enable the foam mixed liquid to pass through a small-to-large connecting port when entering the foam mixing chamber I4 through the foam mixed liquid inlet 1, so that negative pressure is generated inside the foam mixing chamber I4, air is automatically sucked by the air self-sucking pump 2, the foam mixed liquid is formed in the foam mixing chamber I4, the foam mixed liquid is blown out through the blowing chamber 8 through the foam mixing chamber II 5 along the foam liquid conveying pipe 10, the foam raised in the air is contacted with dust in the return air roadway of the excavation working face, and the foam fully adsorbs dust in the air. The impurities in the air are filtered by arranging a filter screen 9. The foam mixed liquid conveying device 12 is a known three-phase foam generating device for KSP mines.
Be provided with supplementary mixing member in the foam mixing chamber two 5, supplementary mixing member sets up to mesh baffle assembly, and mesh baffle assembly includes mesh circular baffle 6 and mesh cowl 7, installs mesh circular baffle 6 between foam mixing chamber one 4 and the foam mixing chamber two 5, and the foam mixing chamber two 5 inner chambers mid-mounting has mesh cowl 7. The large foam in the first foam mixing chamber 4 is crushed by installing the reticular circular baffle 6, so that the generated foam is more stable and is not easy to break; 7 radians of mesh cowl try best to laminate the mechanical internal surface and make, and such equipment is more stable, and the leakproofness is strong. The function of the baffle is the same as that of the mesh circular baffle 6, so that the foam is broken and the quality of the foam is improved.
A fan 14 is installed in the blast chamber 8. The blowing chamber 8 is internally provided with four medium-sized fans 14 with the same structure, and the four fans 14 are arranged to blow out the foam in the second foam mixing chamber 5.
The second foam mixing chamber 5 is in a circular truncated cone shape, the bottom of the circular truncated cone is fixedly connected with the top of the first foam mixing chamber 4, and the top of the circular truncated cone is fixedly connected with a foam infusion tube 10. The second foam mixing chamber 5 is a device with a round table-shaped inlet and a small outlet, the taper of the round table is 60 degrees, when the taper of the round table is 60 degrees, the generatrix of the round table is equal to the radius of the bottom surface, the area ratio of the upper bottom surface to the lower bottom surface of the round table is 1, more suitable foam enters the foam infusion tube 10 under a larger pressure, and the design with the large inlet and the small outlet can increase the pressure of the foam outlet.
The dust removing device further comprises a dust catching net 13, and the dust catching net 13 is arranged at the downstream of the dust removing device. The dust catching net 13 is arranged at the downstream of the dust removing device, so that foam in the air can be in full contact with dust conveniently, and after the foam completely adsorbs the dust, the contact dust catching net 13 is broken and naturally settled to the ground.
The foam transfusion tube 10 is a transparent hose. The foam transfer line sets up in tunnel upper portion and lane group both sides, divides to locate the inside different region in tunnel and makes along foam evenly distributed in the tunnel cross-section of foam transfer line spun, and the quality of the foam is produced in the observation that transparent hose can be better, chooses for use unified big pipe footpath to be convenient for improve foam outlet efficiency.
The dust removal device comprises a dust removal system, the dust removal system comprises a mixing unit, a blowing unit and a general control unit 11, the mixing unit is electrically connected with a foam mixing chamber I4, the blowing unit is electrically connected with a blowing chamber 8, and the general control unit 11 is in communication connection with the mixing unit and the blowing unit.
Install manometer 3 in the foam mixed liquid inlet 1, manometer 3 and total control unit 11 communication connection, total control unit 11 receives manometer 3's pressure signal control air self priming pump 2 work.
In an excavation working face return airway, when a heading machine begins to cut coal rocks, aiming at dust generated by a working face, a foam mixing and conveying device 12 conveys foam liquid, the foam mixed liquid enters a foam mixing chamber I4 from a foam mixed liquid inlet 1, and a connecting port between the foam mixed liquid inlet 1 and the foam mixing chamber I4 is set from large to small, so that the static pressure of the fluid is reduced according to Bernoulli's theorem when unpressurized and ideal fluid flows along a flow pipe at a constant flow, namely the flow speed is increased; conversely, the flow speed is reduced, the static pressure of the fluid can be increased, when the foam mixed liquid flows into the first foam mixing chamber 4 through the section of the inlet section which is suddenly reduced, negative pressure can be generated in the first foam mixing chamber 4, the pressure gauge 3 detects the pressure and transmits a pressure signal to the main control unit 11, then the main control unit 11 controls the air self-sucking pump 2 to automatically suck air into the first foam mixing chamber 4, the pressure in the foam mixed liquid reaches dynamic balance, the foam mixed liquid and the air are preliminarily mixed in the first foam mixing chamber 4, after preliminary mixing, the main control unit 11 starts a fan, the foam mixed liquid which completes the preliminary mixing is blown to the second foam mixing chamber 5 together with the air by the blowing chamber 8, the second foam mixing chamber 5 is additionally provided with a circular baffle 6, the meshed circular baffle has the function of smashing the foam, the smashed foam is more stable and difficult to break, the foam quality is ensured, a meshed arc baffle is additionally arranged on the second foam mixing chamber 5, the mesh arc baffle is used for further smashing the foam, and accordingly, and stable and difficult to smash the foam which meets the standard. Foam transfusion pipe 10 sets up in tunnel upper portion and both sides lane group, and the foam that produces in the foam mixing chamber two 5 blows out through the fan in blast chamber 8, and the foam evenly distributed along foam transfusion pipe 10 spun makes foam and the dust in the working face combine together on the tunnel cross-section, and the foam is after fully adsorbing the dust in the air, and the air return way flutters, and the automatic fracture after contacting dust catching net 13 to reach the effect of foam dust fall.
In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing illustrates and describes the general principles, principal features, and advantages of the present disclosure. It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the disclosure, and that various changes and modifications may be made to the disclosure without departing from the spirit and scope of the disclosure, which is intended to be covered by the claims.
Claims (9)
1. From inhaling air frothing's mining working face return air gallery foam dust collector, including foam mixing chamber (4) and foam mixing chamber two (5), its characterized in that, foam mixed liquid inlet (1) has been seted up in foam mixing chamber (4), foam mixed liquid inlet (1) is connected with foam mixed liquid conveyor (12), the connector between foam mixing chamber (4) and foam mixed liquid inlet (1) sets up to be by big to little, surface mounting has air self priming pump (2) in foam mixing chamber (4), be provided with filter screen (9) between foam mixing chamber (4) and air self priming pump (2), foam mixing chamber (4) up end and foam mixing chamber two (5) inner chamber intercommunication, end face and blast chamber (8) inner chamber intercommunication under foam mixing chamber (4), foam mixing chamber two (5) tops are provided with foam transfer line (10).
2. The self-air-suction foaming mining face return airway foam dust removing device according to claim 1, wherein an auxiliary mixing piece is arranged in the second foam mixing chamber (5), the auxiliary mixing piece is arranged as a mesh baffle assembly, the mesh baffle assembly comprises a mesh circular baffle (6) and a mesh arc baffle (7), the mesh circular baffle (6) is arranged between the first foam mixing chamber (4) and the second foam mixing chamber (5), and the mesh arc baffle (7) is arranged in the middle of the inner cavity of the second foam mixing chamber (5).
3. The self-aspirating air foaming mining face return air duct foam dedusting apparatus of claim 1, characterized in that the blast chamber (8) has a fan (14) installed therein.
4. The self-air-suction foaming mining working face air return duct foam dedusting device of claim 1, wherein the second foam mixing chamber (5) is in a circular truncated cone shape, the bottom of the circular truncated cone is fixedly connected with the top of the first foam mixing chamber (4), and the top of the circular truncated cone is fixedly connected with a foam infusion tube (10).
5. The self-priming air-frothing mining face return airway foam dust removal device of claim 1, wherein the dust removal device further comprises a dust catching screen (13), the dust catching screen (13) being disposed downstream of the dust removal device.
6. The self-priming air-foaming mining face return airway foam dust collector as recited in claim 1, wherein the foam infusion tube (10) is provided as a transparent hose.
7. The self-priming air foaming mining face air return roadway foam dust removal device as recited in claim 1, wherein the dust removal device comprises a dust removal system, the dust removal system comprises a mixing unit, a blowing unit and a general control unit (11), the mixing unit is electrically connected with the foam mixing chamber one (4), the blowing unit is electrically connected with the blowing chamber (8), and the general control unit (11) is in communication connection with the mixing unit and the blowing unit.
8. The self-air-suction foaming foam dust removal device for the return airway of the mining working surface according to claim 1, wherein a pressure gauge (3) is installed in the foam mixed liquid inlet (1), the pressure gauge (3) is in communication connection with a master control unit (11), and the master control unit (11) receives a pressure signal of the pressure gauge (3) to control the air self-suction pump (2) to work.
9. The foam dedusting method for the return airway of the mining working face through self-suction air foaming is characterized by comprising the dedusting device of any one of claims 1 to 8, wherein foam sprayed by the dedusting device is raised in an airway to adsorb dust in the airway, the foam is intercepted through a dust catching net, after the foam contacts the dust catching net, the foam is broken and naturally settled under the gravity, and foam liquid conveying pipes are lengthened and arranged on the upper portion of the airway and on two sides of the airway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211278126.6A CN115463499A (en) | 2022-10-19 | 2022-10-19 | Self-air-suction foaming foam dust removal device and method for air return gallery of excavation working face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211278126.6A CN115463499A (en) | 2022-10-19 | 2022-10-19 | Self-air-suction foaming foam dust removal device and method for air return gallery of excavation working face |
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| CN115463499A true CN115463499A (en) | 2022-12-13 |
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