CN111167225A - Device for quickly eliminating instantaneous smoke in coal mine underground blasting operation space and using method - Google Patents
Device for quickly eliminating instantaneous smoke in coal mine underground blasting operation space and using method Download PDFInfo
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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
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
- B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
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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
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
-
- 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
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
-
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention provides a device for quickly eliminating instantaneous smoke dust in a blasting operation space in a coal mine and a using method thereof, wherein the device comprises an underground compressed air pipeline, a negative pressure injection device, a multistage negative pressure dust suction device and a high pressure wet spraying device; the negative pressure power sucks the smoke dust through a multi-stage negative pressure dust suction device and performs separation; the flue gas after dust removal and high-pressure gas are mixed and enter a high-pressure wet spraying device, toxic and harmful flue gas is absorbed by organic active agent, and the clean gas and the moisture combined by the organic active agent are sprayed to an underground blasting operation space to implement further dust removal. The device has the advantages of small volume, convenient movement, simple operation, realization of industrial production and strong field practicability; the invention has the multi-stage linkage smoke dust eliminating function of absorbing dust under negative pressure, dissolving smoke gas by organic active agent and humidifying and reducing dust under high pressure, has high efficiency and good effect, and realizes effective treatment with low cost and high speed.
Description
Technical Field
The invention belongs to the technical field of smoke dust treatment, and particularly relates to a device for quickly eliminating instantaneous smoke dust in a blasting operation space under a coal mine and a using method.
Background
The underground coal mine excavation work inevitably needs to use explosives or other blasting materials, and a large amount of thick toxic and harmful smoke dust can be associated in the moment when blasting is implemented, such as: the concentration of carbon monoxide, nitrogen dioxide, dinitrogen trioxide, sulfur dioxide, hydrogen sulfide, ammonia and respiratory dust is far greater than that of smoke dust generated on the working face of the machine. The high-concentration smoke dust threatens the safety production of mines and can also induce various occupational diseases such as lung, cardiovascular disease and brain disease which harm the health of miners. By the end of 2018, 97.5 thousands of occupational diseases are cumulatively reported in China, wherein 87.3 thousands of occupational pneumoconiosis accounts for about 90% of the total number of reported occupational disease cases, the pneumoconiosis of coal mine workers exceeds more than 50% of the total number of the pneumoconiosis, and the occupational hazard prevention and control situation of coal mine underground smoke is very severe.
At present, the basic idea of classified treatment of smoke dust is adopted in the underground coal mine, a comprehensive treatment technology is not formed, and the possibility of secondary damage exists. The tunnel flue gas treatment mainly comprises ventilation and dissipation, and the flue gas in the operation space is brought into a ventilation system by using underground fresh air flow, flows to the outside along an air inlet tunnel and an air return tunnel and is finally discharged to the ground atmosphere. In the process of ventilation airflow transmission, harmful gas passes through a plurality of ventilation roadways, and when the concentration of toxic and harmful gas is not diluted by wind current to be below the safety standard specified in the coal mine safety regulation, workers in the lower wind current can gradually breathe toxic and harmful smoke step by step. Compared with underground smoke pollution, the coal dust harm degree is larger, the blasting operation is instantaneous, thick coal dust is diffused in a limited space, and the concentration of the respiratory dust smaller than 5 mu m is highUp to 300mg/m3The coal dust exceeds 100 times, and the coal dust with explosion tendency can cause coal dust explosion in a certain limited space. After blasting operation, spraying and catching are two main dust falling means, liquid is atomized by a high-pressure water pump for spray dust falling, dust is carried by atomized gas to settle by means of liquid gravity, and secondary dust rise is possible after water on the surface of the dust is evaporated for a period of time; the dust is captured by forcibly absorbing floating dust by using a gas negative pressure extraction system or small-sized movable electric extraction pump equipment, and in the underground application process, the dust entering the negative pressure extraction system can not only increase the negative pressure loss of a pipeline, influence the gas extraction efficiency, but also harm the performance of an extraction pipeline system; the small movable electric extraction pump also needs underground power supply, and has complex operation and low safety.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies in the prior art.
Disclosure of Invention
The invention aims to provide a device for quickly eliminating instantaneous smoke dust in a blasting operation space of a coal mine underground and a using method thereof, which are used for solving the problems of secondary dust generation, complex operation of electromechanical equipment, power utilization danger and the like in the prior art that the ventilation system is used for treating air pollution of underground airflow caused by toxic and harmful smoke and secondary harm of smoke repeatedly breathed by workers, and the technologies of spraying dust by a high-pressure water pump, capturing dust by a negative pressure system and the like are utilized.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides a colliery is instantaneous smoke and dust quick remove device in blasting operation space in pit, includes the pressurized air pipeline in the pit, still includes:
the negative pressure injection device comprises a negative pressure injection cavity, one side of the negative pressure injection cavity is communicated with an air inlet unit, and the other side of the negative pressure injection cavity is communicated with an air outlet unit; the bottom of the negative pressure injection cavity is provided with a negative pressure air suction port which is communicated with the negative pressure injection cavity; the air inlet unit is communicated with the underground compressed air pipeline; the underground compressed air pipeline outputs high-pressure gas to the negative pressure injection cavity through the air inlet unit;
the multi-stage negative pressure dust collection device is characterized by comprising a multi-stage negative pressure dust collection device, wherein one side of the multi-stage negative pressure dust collection device is provided with a multi-stage dust collection device interface which is communicated with the negative pressure air suction port; the other side of the multistage negative pressure dust collection device is provided with a negative pressure capturing unit, and the negative pressure capturing unit is used for sucking toxic and harmful smoke dust into the multistage negative pressure dust collection device in a rolling manner; a plurality of dust filter cores are arranged in the multistage negative pressure dust suction device at intervals and used for intercepting dust;
the side wall of the high-pressure wet spraying device is provided with a liquid injection port and a mixed high-pressure flue gas interface, and the mixed high-pressure flue gas interface is communicated with the negative-pressure injection cavity through the air outlet unit; an organic active agent is arranged in the high-pressure wet spraying device, and the organic active agent is liquid and is used for absorbing toxic and harmful flue gas; the top of the high-pressure wet spraying device is uniformly provided with a plurality of airflow wet spraying ports, and the airflow wet spraying ports are used for spraying wet air to an underground blasting operation space.
In the device for quickly eliminating the instantaneous smoke dust in the coal mine underground blasting operation space, as a preferred scheme, the air inlet unit is communicated with the underground compressed air pipeline through a first rubber pipe; the interface of the multistage dust suction device is communicated with the negative pressure air suction port through a second rubber tube; the mixed high-pressure flue gas interface is communicated with the gas outlet unit through a third rubber pipe;
preferably, the first rubber pipe, the second rubber pipe and the third rubber pipe are all high-pressure flexible rubber pipes.
In the device for quickly eliminating the instantaneous smoke in the coal mine underground blasting operation space, as a preferred scheme, a wind pressure adjusting valve and a pressure gauge are arranged on the first rubber tube, and the wind pressure adjusting valve adjusts and controls the pressure of high-pressure gas in the negative pressure injection cavity through the reading of the pressure gauge;
preferably, the pressure of the high-pressure gas is 0.3-0.8 MPa.
In the device for quickly eliminating the transient smoke dust in the coal mine underground blasting operation space, as a preferred scheme, one end of the air inlet unit is provided with an injection cavity air inlet interface, the injection cavity air inlet interface is positioned outside the negative pressure injection cavity, and the injection cavity air inlet interface is connected with the first rubber pipe; the other end of the air inlet unit is provided with an injection cavity inlet which is positioned in the negative pressure injection cavity; an air inlet hole is arranged between the inlet of the injection cavity and the air inlet interface of the injection cavity in a penetrating manner;
preferably, the sectional area of the inlet of the injection cavity is smaller than that of the air inlet interface of the injection cavity.
In the device for quickly eliminating the transient smoke dust in the coal mine underground blasting operation space, as a preferred scheme, one end of the air outlet unit is provided with an injection cavity air outlet interface, the injection cavity air outlet interface is positioned outside the negative pressure injection cavity, and the injection cavity air outlet interface is connected with the third rubber pipe; the other end of the air outlet unit is provided with an injection cavity outlet which is positioned in the negative pressure injection cavity; an air outlet hole is arranged between the outlet of the injection cavity and the air outlet interface of the injection cavity in a penetrating manner;
preferably, the sectional area of the air outlet interface of the injection cavity is larger than that of the outlet of the injection cavity; the sectional area of the outlet of the injection cavity is larger than that of the inlet of the injection cavity.
In the device for quickly eliminating the instantaneous smoke dust in the coal mine underground blasting operation space, as a preferred scheme, a clamping groove is formed in the multistage negative pressure dust suction device, and the dust filter element is fixed in the multistage negative pressure dust suction device through the clamping groove and used for absorbing dust; the diameters of filter holes of the dust filter element are sequentially increased along the direction from the interface of the multistage dust suction device to the negative pressure capturing unit;
preferably, the dust filter element is provided with three paths, and a first-stage dust filter element, a second-stage dust filter element and a third-stage dust filter element are respectively arranged along the direction from the interface of the multi-stage dust collection device to the negative pressure capture unit;
more preferably, the diameter of the filter hole of the primary dust filter element is 1 μm; the diameter of a filter hole of the secondary dust filter element is 5 mu m; the diameter of a filter hole of the third-level dust filter element is 10 mu m.
In the device for quickly eliminating the transient smoke dust in the coal mine underground blasting operation space, as a preferred scheme, the negative pressure capturing unit is horn-shaped, a negative pressure capturing cavity opening is formed in the negative pressure capturing unit, and the negative pressure capturing cavity opening is communicated with the multistage negative pressure dust suction device and is used for sucking toxic and harmful smoke dust.
In the device for quickly eliminating the instantaneous smoke dust in the coal mine underground blasting operation space, as a preferred scheme, a gas-liquid separation guide pipe is further arranged inside the high-pressure wet spraying device and is communicated with the mixed high-pressure flue gas interface, and the mixed gas in the negative-pressure injection cavity enters the high-pressure wet spraying device through the gas-liquid separation guide pipe;
preferably, the gas-liquid separation flow guide pipe comprises a gas inlet main pipe, two horizontal gas flow channels and two longitudinal gas flow channels, and the two horizontal gas flow channels are in cross communication; one end of the air inlet main pipe is communicated with the mixed high-pressure flue gas interface, and the other end of the air inlet main pipe is communicated with a cross point of the two horizontal airflow channels; the four longitudinal airflow channels are vertically arranged, the upper end openings of the four longitudinal airflow channels are respectively and correspondingly communicated with the ports of the horizontal airflow channel, and the four longitudinal airflow channels are arranged in a claw shape;
more preferably, the distance between the lower end opening of the longitudinal airflow channel and the bottom of the high-pressure wet spraying device is 5-10 cm; the distance between the upper end surface of the gas-liquid separation guide pipe and the airflow wet spraying opening is 10-20 cm.
In the device for quickly eliminating the instantaneous smoke in the coal mine underground blasting operation space, as a preferred scheme, a space between the upper end surface of the gas-liquid separation guide pipe and the airflow wet spraying port is a reservoir cavity which is used for accumulating clean moisture; when the pressure of the gas accumulated in the reservoir cavity is greater than the upper pressure-resistant limit of the gas flow moisture spraying opening, the gas flow moisture spraying opening is automatically opened.
A use method of the device for quickly eliminating the instantaneous smoke in the coal mine underground blasting operation space comprises the following steps:
regulating and controlling the pressure of the high-pressure gas through a wind pressure regulating valve according to the smoke concentration of an underground blasting operation space, and forming a high negative pressure environment in the negative pressure injection cavity;
secondly, high negative pressure entrainment power in the negative pressure injection cavity is transmitted to the multistage negative pressure dust collection device and a negative pressure capture cavity opening, toxic and harmful smoke dust is sucked into the multistage negative pressure dust collection device to implement smoke dust separation, dust in the smoke dust is intercepted by the plurality of dust filter cores in sequence, and the smoke after dust removal enters the negative pressure injection cavity to be mixed with high-pressure gas to form mixed gas;
step three, the mixed gas enters the high-pressure wet spraying device through the gas-liquid separation guide pipe, the mixed gas is fully mixed with the organic active agent, the toxic and harmful flue gas is fully absorbed by the organic active agent, and the residual clean moisture enters the storage cavity;
and fourthly, when the pressure of the gas accumulated in the storage cavity is greater than the upper pressure-resistant limit of the gas flow wet spraying port, the gas flow wet spraying port is automatically opened, the moisture formed after the gas in the storage cavity is combined with the organic active agent is sprayed to the underground blasting operation space through the gas flow wet spraying port, the moisture is coated with the dust after contacting the dust floating in the space, and further dust sedimentation is implemented.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
the device for quickly eliminating the instantaneous smoke dust in the coal mine underground blasting operation space outputs high-pressure gas to the negative pressure injection cavity by utilizing the underground compressed air pipeline system, and a high negative pressure environment is formed in the negative pressure injection cavity of the negative pressure injection device, so that the multistage negative pressure dust suction device and the high pressure wet spraying device are linked, the multistage negative pressure dust suction device actively intercepts dust generated by blasting operation, smoke and dust separation is realized, the high pressure wet spraying device actively absorbs harmful smoke, outwards sprays moisture, wraps the dust, and further sedimentation is realized; the whole set of device and the using method realize the multi-stage dynamic smoke elimination targets of dust absorption under negative pressure, smoke dissolution by organic active agents and dust fall under high pressure humidification.
The air power source in the underground compressed air pipeline is sufficient, the multistage negative pressure dust collection device and the negative pressure capture cavity are driven to suck toxic and harmful smoke dust, mechanical friction does not exist in the whole driving operation process, the device has the advantage of intrinsic safety, the whole set of device is small in size, convenient and fast to move and simple to operate, the defects of electricity utilization risk, high energy consumption and the like of an electric device for collecting dust by using a traditional high-pressure water injection pump for spray dust collection and an electric extraction pump are eliminated, the device can realize industrial production, and the device is strong in practicability and can be popularized and applied.
The use method of the device for quickly eliminating the transient smoke dust in the coal mine underground blasting operation space achieves the purpose of quickly sucking the thick smoke dust through the negative pressure injection function of the negative pressure injection device, and the multistage negative pressure dust suction device and the high pressure wet spraying device are used for actively intercepting dust, absorbing smoke and spraying moisture to achieve the effects of smoke dust separation and multistage treatment. The method effectively overcomes the current situation that the ventilation system is used for treating the downwind air pollution caused by the poisonous and harmful flue gas and the danger that the workers repeatedly breathe the flue gas in the prior art, and solves the problems of complex operation, power utilization danger and the like of the underground electromechanical equipment dust removal method.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic structural diagram of a device for rapidly eliminating instantaneous smoke in a blasting operation space in an underground coal mine in the embodiment of the invention;
FIG. 2 is a schematic external structural diagram of a negative pressure injection device according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a negative pressure injection apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic view of the external structure of the multi-stage vacuum cleaner of the present invention;
FIG. 5 is a schematic external view of a high pressure wet spraying apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a gas-liquid separation draft tube in the embodiment of the present invention;
FIG. 7 is a schematic diagram of the field application distribution of the device for quickly eliminating the transient smoke dust in the blasting operation space of the underground coal mine in the embodiment of the invention.
In the figure: 1. a downhole compressed air pipeline; 2. a wind pressure adjusting valve; 201. a pressure gauge; 3. a high pressure gas; 4. an air intake unit; 401. an air inlet interface of the injection cavity; 402. an air inlet; 403. an inlet of the injection cavity; 5. a negative pressure injection device; 6. an air outlet unit; 601. an outlet of the injection cavity; 602. an air outlet; 603. an air outlet interface of the injection cavity; 7. a negative pressure injection cavity; 9. a negative pressure air suction port; 10. a multi-stage dust suction device interface; 11. a multi-stage negative pressure dust suction device; 12. a first-stage dust filter element; 13. a secondary dust filter element; 14. a third-stage dust filter element; 15. a negative pressure capturing unit; 1501. a negative pressure capturing orifice; 16. a mixed high pressure flue gas interface; 17. a gas-liquid separation draft tube; 1701. a longitudinal airflow channel; 1702. a horizontal airflow channel; 1703. an intake manifold; 18. an organic active agent; 19. an air flow wet spraying port; 20. a high pressure spray wetting device; 21. a liquid injection port; 2201. a first hose; 2202. a second hose; 2203. a third rubber tube; 23. a reservoir cavity; 24. injecting smoke; 25. mixing the gas; 26. blasting operation space in the pit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention utilizes the necessary underground compressed air pipeline system to construct a negative pressure injection device, a multistage negative pressure dust suction device and a high pressure spray wet device, the negative pressure injection device not only can form a negative pressure environment in a negative pressure injection cavity and transmit negative pressure power to the multistage negative pressure dust suction device to realize dust active interception and dust separation, but also can transmit high pressure air power to the high pressure spray wet device, utilize an organic active agent to actively absorb harmful flue gas, spray moisture to a blasting space, utilize the moisture to wrap the dust, implement further sedimentation and realize the multi-stage linkage smoke dust elimination method of negative pressure dust absorption, liquid dissolved flue gas and high pressure humidifying dust fall.
As shown in fig. 1, which is a schematic structural diagram of a device for quickly removing transient smoke dust in a coal mine underground blasting operation space in the embodiment of the present invention, the embodiment of the present invention provides a device for quickly removing transient smoke dust in a coal mine underground blasting operation space, which comprises an underground compressed air pipeline 1, a negative pressure injection device 5, a multistage negative pressure dust collection device 11, and a high pressure wet spraying device 20; the direction of the arrows in fig. 1 and 3 indicate the gas flow direction. As shown in fig. 2, the external structure of the negative pressure ejector is schematically illustrated, and the negative pressure ejector is composed of an air inlet unit 4, an air outlet unit 6, a negative pressure ejector cavity 7, and a negative pressure air inlet 9. The negative pressure injection device 5 comprises a negative pressure injection cavity 7, one side of the negative pressure injection cavity 7 is communicated with an air inlet unit 4, the other side of the negative pressure injection cavity 7 is communicated with an air outlet unit 6, and the air inlet unit 4 and the air outlet unit 6 are both communicated with the negative pressure injection cavity 7; the bottom of the negative pressure injection cavity 7 is provided with a negative pressure air suction port 9, and the negative pressure air suction port 9 is communicated with the negative pressure injection cavity 7; the air inlet unit 4 is communicated with the underground compressed air pipeline 1 through a first rubber pipe 2201; the underground compressed air pipeline 1 outputs high-pressure gas 3 to the negative pressure injection cavity 7 through a first rubber pipe 2201, and the high-pressure gas 3 enters the negative pressure injection cavity 7 through the air inlet unit 4. The high-pressure gas 3 enters the negative pressure injection cavity 7 from the gas inlet unit 4 at a high speed, and a high negative pressure environment is formed in the negative pressure injection cavity 7 due to the turbulent dispersion effect of jet flow.
In the specific embodiment of the invention, the air inlet unit 4 is communicated with the underground compressed air pipeline 1 through a first rubber pipe 2201; the first hose 2201 is a high-pressure flexible hose. The inner core of the high-pressure flexible rubber hose is made of nylon, the reinforcing layer is formed by weaving steel wires, the outer skin is made of polyurethane, the maximum pressure resistance value is not lower than 5MPa, and the high-pressure flexible rubber hose can bear higher gas pressure.
In the specific embodiment of the present invention, the first rubber pipe 2201 is provided with the wind pressure adjusting valve 2 and the pressure gauge 201, and the wind pressure adjusting valve 2 adjusts and controls the pressure of the high-pressure gas 3 in the negative pressure injection cavity 7 according to the indication number of the pressure gauge 201. When the pressure regulating valve 2 is used, the air pressure regulating valve 2 is regulated until the pressure reading of the pressure gauge 201 reaches a preset pressure value, and the pressure value is the pressure of the high-pressure gas 3 in the negative pressure injection cavity 7.
Preferably, the pressure of the high-pressure gas 3 is 0.3 to 0.8MPa (e.g., 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.8 MPa).
The principle of negative pressure injection is as follows: assuming that the gas flow in the negative pressure injection cavity 7 is uniform, according to the injection equation, the high negative pressure environment in the negative pressure injection cavity 7 can be realized, and the momentum conservation theorem expression in the negative pressure injection cavity 7 is as follows:
the cross-sectional areas of the inlet 403 of the ejection cavity, the negative pressure air suction port 9 and the outlet 601 of the ejection cavity of the ejection device can be optimized through the formula, and the regulation and control of the pressure of the high-pressure gas 3 in the negative pressure ejection cavity 7 can be guided:
wherein: m1、M2、M3The mass flow rates (unit is kg/s) of the high-pressure gas 3, the ejection smoke 24 and the mixed gas 25 are respectively; v1、V2、V3The flow rates (unit is m/s) of the high-pressure gas 3, the ejection smoke 24 and the mixed gas 25 are respectively; s1The cross-sectional area (unit is m) of the high-pressure gas 3 entering the inlet 403 of the injection cavity2)；S2The sectional area (unit is m) for injecting the flue gas 24 into the negative pressure air suction port 92)；S3The cross-sectional area (m) of the mixed gas 25 entering the outlet 601 of the injection cavity2)；P1、P2、P3Respectively the static pressure (unit is MPa) of the high-pressure gas 3, the ejection smoke 24 and the mixed gas 25.
As shown in fig. 3, which is a cross-sectional view of a negative pressure injection device, in a specific embodiment of the present invention, an injection cavity air inlet interface 401 is arranged at one end of an air inlet unit 4, the injection cavity air inlet interface 401 is located outside a negative pressure injection cavity 7, the injection cavity air inlet interface 401 is connected with one end of a first rubber pipe 2201, and the other end of the first rubber pipe 2201 is connected with an underground compressed air pipeline 1; the other end of the air inlet unit 4 is provided with an injection cavity inlet 403, and the injection cavity inlet 403 is positioned in the negative pressure injection cavity 7; an air inlet 402 penetrates between the inlet 403 of the injection cavity and the air inlet interface 401 of the injection cavity.
Preferably, the cross-sectional area of the injection cavity inlet 403 is smaller than the cross-sectional area of the injection cavity air inlet interface 401.
In a specific embodiment, the air inlet 402 is a gas passage through which high-pressure gas in the downhole compressed air pipeline 1 enters the negative pressure injection cavity 7, the air inlet 402 is in a conical shape with openings at two ends, and the sectional area of the injection cavity inlet 403 is smaller than that of the injection cavity air inlet interface 401, so that a fast flow rate is generated at the injection cavity inlet 403, and a negative pressure environment is formed in the negative pressure injection cavity.
In specific implementation, one end of the first rubber pipe 2201 is communicated with the underground compressed air pipeline 1, the other end of the first rubber pipe is communicated with an injection cavity air inlet interface 401 of the air inlet unit 4, the high-pressure gas 3 enters an air inlet hole 402 from the injection cavity air inlet interface 401 and is then output into the negative pressure injection cavity 7 from an injection cavity inlet 403, the high negative pressure environment in the negative pressure injection cavity 7 enables negative pressure entrainment power to be transmitted to the multistage negative pressure dust collector 11 to suck smoke dust, the injection smoke 24 enters the negative pressure injection cavity 7 to be mixed with the high-pressure gas in the mixing chamber to exchange momentum, mass and energy, the speed is gradually balanced in the flowing process, and the formed mixed gas 25 enters the high-pressure wet spraying device 20 through an injection cavity outlet 601 of the air outlet unit 6.
In the specific embodiment of the present invention, one end of the air outlet unit 6 is provided with an ejection cavity air outlet port 603, the ejection cavity air outlet port 603 is located outside the negative pressure ejection cavity 7, and the ejection cavity air outlet port 603 is connected to the third rubber pipe 2203; the other end of the air outlet unit 6 is provided with an injection cavity outlet 601, and the injection cavity outlet 601 is positioned inside the negative pressure injection cavity 7; an air outlet 602 is arranged between the injection cavity outlet 601 and the injection cavity air outlet port 603 in a penetrating manner.
Preferably, the sectional area of the outlet port 603 of the injection cavity is larger than that of the outlet 601 of the injection cavity; the cross-sectional area of the jet chamber outlet 601 is greater than the cross-sectional area of the jet chamber inlet 403.
During specific implementation, the air outlet 602 is a gas passage through which the mixed gas 25 in the negative pressure injection cavity 7 enters the injection cavity air outlet interface 603 from the injection cavity outlet 601, the part of the air outlet 602 located inside the negative pressure injection cavity 7 is in an open cylindrical shape, the part located outside the negative pressure injection cavity 7 is in a conical shape, and the sectional area of the injection cavity air outlet interface 603 is larger than that of the injection cavity outlet 601, so that a large flow is generated at the injection cavity outlet 601, and negative pressure formation in the negative pressure injection cavity 7 is facilitated.
In a specific embodiment, the cross-sectional area of the exit 601 of the injection chamber is greater than the cross-sectional area of the entrance 403 of the injection chamber, i.e., S1＜S3；
More preferably, in a specific embodiment, the sectional area of the injection cavity air inlet interface 401 is equal to the sectional area of the injection cavity air outlet interface 603; the injection cavity air inlet interface 401 and the injection cavity air outlet interface 603 are respectively connected with a first rubber pipe 2201 and a second rubber pipe 2202, the sectional area of the injection cavity air inlet interface 401 is kept equal to that of the injection cavity air outlet interface 603, and the diameters of the first rubber pipe 2201 and the second rubber pipe 2202 are also the same.
As shown in fig. 4, which is a schematic external structural diagram of the multistage negative pressure dust collector in the embodiment of the present invention, a multistage dust collector interface 10 is communicated with one side of the multistage negative pressure dust collector 11, the multistage dust collector interface 10 is communicated with the negative pressure air suction port 9 through a second rubber tube 2202, so that the negative pressure injection cavity 7 is communicated with the multistage negative pressure dust collector 11, and the negative pressure injection cavity 7 injects flue gas in the multistage negative pressure dust collector 11 through the second rubber tube 2202; the other side of the multistage negative pressure dust collector 11 is provided with a negative pressure catching unit 15, and the negative pressure catching unit 15 is used for sucking toxic and harmful smoke dust into the multistage negative pressure dust collector 11; a plurality of dust filter cores are arranged in the multistage negative pressure dust suction device 11 at intervals and used for intercepting dust.
In a particular embodiment of the present invention, the second hose 2202 is a high pressure flexible hose.
During specific implementation, toxic and harmful smoke dust enters the multistage negative pressure dust suction device 11 under the entrainment effect of the negative pressure capturing unit 15, firstly, the dust passes through the three dust filter elements and is intercepted in sequence, then, the ejection smoke 24 is sucked into the negative pressure ejection cavity 7 under the action of negative pressure entrainment power, smoke dust separation is realized, the ejection smoke 24 and the high-pressure gas 3 in the negative pressure ejection cavity 7 are mixed in the mixing chamber, momentum, mass and energy exchange is carried out, the speed is gradually balanced in the flowing process, and the ejection smoke is mixed in the negative pressure ejection cavity 7 and then is output from the ejection cavity air outlet port 603.
In the specific embodiment of the invention, a clamping groove is arranged inside the multistage negative pressure dust suction device 11, and the dust filter element is fixed inside the multistage negative pressure dust suction device 11 through the clamping groove and used for absorbing dust; along the direction from the multi-stage dust suction device interface 10 to the negative pressure capturing unit 15, the diameters of the filter holes of the dust filter core are sequentially increased; wherein, the dust filter core is pull-plug type to change, can dismantle the sanitization after dust filter core fills up the dust, used repeatedly.
Preferably, the dust filter core is provided with three channels, namely a first-stage dust filter core 12, a second-stage dust filter core 13 and a third-stage dust filter core 14 along the direction from the multi-stage dust suction device interface 10 to the negative pressure capture unit 15.
More preferably, the diameter of the filter hole of the primary dust filter element is 1 μm; the diameter of a filter hole of the secondary dust filter element is 5 mu m; the diameter of a filter hole of the third-level dust filter element is 10 mu m.
In the embodiment of the present invention, the negative pressure capturing unit 15 is in a horn shape, and the horn-shaped negative pressure capturing unit 15 can capture toxic and harmful smoke to the maximum extent. The negative pressure capturing unit 15 is internally provided with a negative pressure capturing cavity opening 1501, and the negative pressure capturing cavity opening 1501 is communicated with the multistage negative pressure dust suction device 11 and is used for sucking toxic and harmful smoke dust. The smoke dust firstly passes through a plurality of dust filter elements to intercept the dust, and the residual smoke gas is sucked into the negative pressure injection cavity 7 through the negative pressure air suction port 9.
As shown in fig. 5, which is a schematic external structural diagram of the high-pressure wet spraying device in the embodiment of the present invention, a liquid injection port 21 and a mixed high-pressure flue gas interface 16 are arranged on a side wall of the high-pressure wet spraying device 20, the mixed high-pressure flue gas interface 16 is communicated with the negative-pressure injection cavity 7 through the air outlet unit 6, and the mixed gas 25 in the negative-pressure injection cavity 7 enters the high-pressure wet spraying device 20 through a third rubber pipe 2203; the high-pressure wet spraying device 20 is internally provided with an organic active agent 18, and the organic active agent 18 is liquid and is used for absorbing toxic and harmful smoke; the top of the high-pressure wet spraying device 20 is uniformly provided with a plurality of airflow wet spraying ports 19, and the airflow wet spraying ports 19 are used for spraying moisture to the underground blasting operation space 26.
In the specific embodiment, an organic active agent 18 with a certain concentration is prepared, wherein the organic active agent 18 has double effects, can absorb toxic and harmful smoke generated after blasting and can improve the wettability of liquid to coal dust, and comprises a nonionic penetrant JFC and an aqueous solution of inorganic salt, wherein the nonionic penetrant JFC is 0.05-2 percent, the inorganic salt is 20-40 percent and the balance is water in percentage by mass; wherein the inorganic salt is calcium chloride, sodium chloride, etc.
In a specific embodiment, in the specific embodiment of the present invention, the mixed high-pressure flue gas interface 16 is communicated with the gas outlet unit 6 through a third rubber pipe 2203; the third hose 2203 is a high-pressure flexible hose.
Fig. 6 is a schematic structural diagram of a gas-liquid separation draft tube in the embodiment of the present invention, in the specific embodiment of the present invention, a gas-liquid separation draft tube 17 is further disposed inside the high-pressure wet spraying device 20, the gas-liquid separation draft tube 17 is vertically disposed, a lower end of the gas-liquid separation draft tube 17 is communicated with the mixed high-pressure flue gas interface 16, and the mixed gas 25 in the negative-pressure injection cavity 7 enters the high-pressure wet spraying device 20 through the lower end of the gas-liquid separation draft tube 17; the mixed gas 25 is fully mixed with the organic active agent 18, toxic and harmful flue gas in the mixed gas 25 is fully absorbed by the organic active agent 18, and the residual clean moisture in the high-pressure wet spraying device 20 is eliminated and flows through the organic active agent 18 to enter the storage cavity 23 at the upper part of the high-pressure wet spraying device 20.
Preferably, the gas-liquid separation draft tube 17 comprises an air inlet manifold 1703, two horizontal gas flow channels 1702 and a longitudinal gas flow channel 1701, wherein the two horizontal gas flow channels 1702 are in cross communication; one end of the air inlet manifold 1703 is communicated with the mixed high-pressure flue gas interface 16, and the other end of the air inlet manifold 1703 is communicated with the intersection point of the two horizontal airflow channels 1702; the longitudinal airflow channels 1701 are vertically arranged, four longitudinal airflow channels 1701 are arranged, the upper end openings of the four longitudinal airflow channels 1701 are respectively and correspondingly communicated with the ports of the horizontal airflow channels 1702, and the four longitudinal airflow channels 1701 are arranged in a claw shape; this arrangement facilitates contact of the mixed gas 25 with the organic active agent 18, improves purification efficiency, and enhances humidification.
More preferably, the distance between the lower opening of the longitudinal airflow channel 1701 and the bottom of the high-pressure wet spraying device 20 is within a range of 5-10 cm (for example, 5cm, 6cm, 7cm, 8cm, 9cm, 10 cm); the distance between the upper end surface of the gas-liquid separation draft tube 17 and the gas flow wetting opening 19 ranges from 10cm to 20cm (for example, 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm and 20cm), and a gas storage cavity 23 is formed in a space between the upper end surface of the gas-liquid separation draft tube 17 and the gas flow wetting opening 19.
More preferably, the lower end surface of the horizontal airflow passage 1702 is higher than the height of the lower edge of the liquid pouring outlet 21.
In the specific embodiment, the prepared organic active agent 18 is injected into the high-pressure wet spraying device 20 through the injection port 21, the airflow wet spraying port 19 is manually opened before injection, so that the organic active agent 18 is injected while air in the high-pressure wet spraying device 20 is exhausted, and when the liquid level of the organic active agent 18 is the same as the height of the lower edge of the injection port, the airflow wet spraying port 19 is closed; because the lower end surface of the horizontal airflow channel 1702 is higher than the lower edge of the liquid injection port 21, no liquid is filled in the horizontal airflow channel 1702, and only the four longitudinal airflow channels 1701 are filled with liquid; when the mixed gas 25 enters the four longitudinal gas flow channels 1701 through the gas inlet manifold 1703, the mixed gas extrudes the liquid in the longitudinal gas flow channels 1701, so that the organic active agents 18 in the four longitudinal gas flow channels 1701 are discharged into the high-pressure spraying device 20, after the whole gas-liquid separation guide pipe is filled with the mixed gas 25, the mixed gas 25 overflows from the bottom of the longitudinal gas flow channels 1701, toxic and harmful flue gas is absorbed by the organic active agents 18, and the residual clean gas carries water into the storage cavity 23 to form moisture.
In the embodiment of the present invention, the space between the upper end surface of the gas-liquid separation draft tube 17 and the gas flow wet spraying port 19 is a reservoir chamber 23, and the reservoir chamber 23 is used for accumulating clean moisture; when the pressure of the gas accumulated in the reservoir cavity 23 is greater than the upper pressure limit of the gas flow moisture spraying port 19, the gas flow moisture spraying port 19 is automatically opened, the pressure resistance value of the gas flow moisture spraying port 19 can be set to be in the range of 0.1MPa to 0.6MPa (such as 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa and 0.6MPa), and the set value is always kept to be 0.2MPa lower than the pressure value set by the high-pressure gas 3.
In specific implementation, the airflow wetting port 19 has a certain pressure-resistant range, when the pressure accumulated in the reservoir cavity is greater than the upper pressure-resistant limit of the airflow wetting port 19, the airflow wetting port 19 is automatically opened, then the moisture formed by combining the gas in the reservoir cavity and the organic active agent 18 is sprayed to the underground blasting operation space 26, the dust is wrapped after the dust floats in the mist contact space, then sedimentation is performed, and the dust elimination is further enhanced.
The invention also provides a use method of the device for quickly eliminating the instantaneous smoke dust in the blasting operation space of the underground coal mine, as shown in fig. 7, which is a simplified distribution schematic diagram of the field application distribution of fig. 1. The method is realized by adopting the device for quickly eliminating the instantaneous smoke dust in the blasting operation space of the underground coal mine and a field application distribution mode as shown in figures 1 and 7, and comprises the following steps:
firstly, according to the smoke concentration of the underground blasting operation space 26, the pressure of the high-pressure gas 3 is regulated and controlled through the wind pressure regulating valve 2 and the pressure gauge 201, and a high negative pressure environment is formed in the negative pressure injection cavity 7. The high-pressure gas 3 enters the negative pressure injection cavity 7 from the injection cavity inlet 403 at a high speed, a high negative pressure environment is formed in the negative pressure injection cavity 7 due to turbulent diffusion of jet flow, the pressure of the high-pressure gas is regulated and controlled by the wind pressure regulating valve 2, and the wind pressure range is controlled to be 0.3-0.8 MPa (such as 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa and 0.8 MPa).
And step two, high negative pressure entrainment power in the negative pressure injection cavity 7 is transmitted to the multistage negative pressure dust suction device 11 and the negative pressure trapping cavity port 1501 through a second rubber tube 2202, toxic and harmful smoke and dust are sucked into the multistage negative pressure dust suction device 11 to separate smoke and dust, dust in the smoke and dust is intercepted by a plurality of dust filter cores in sequence, and the injection smoke 24 after dust removal enters the negative pressure injection cavity 7 to be mixed with high-pressure gas to form mixed gas 25. The multistage dust collection device is internally provided with a first-stage dust filter core 12, a second-stage dust filter core 13 and a third-stage dust filter core 14 in sequence, the dust particle size absorbed by the third-stage dust filter core 14 is larger than 10 micrometers, the dust particle size absorbed by the second-stage dust filter core 13 is 5-10 micrometers, the dust particle size absorbed by the first-stage dust filter core 12 is 1-5 micrometers, the dust is intercepted by the third-stage dust filter core 14, the second-stage dust filter core 13 and the first-stage dust filter core 12 in sequence, the smoke enters a negative pressure injection cavity 7 along a second rubber tube 2202, the smoke 24 and high-pressure gas 3 are mixed in a mixing chamber to exchange momentum, mass and energy, the speed is gradually balanced in the flowing process, and the smoke is output from an injection cavity air outlet port 603 after being mixed in the negative pressure injection cavity.
And step three, the mixed gas 25 enters the high-pressure wet spraying device 20 through the gas-liquid separation guide pipe 17, the mixed gas 25 is fully mixed with the organic active agent 18, the toxic and harmful flue gas is fully absorbed by the organic active agent 18, and the residual clean moisture enters the storage cavity. Specifically, an organic active agent 18 with a certain concentration needs to be prepared in advance, the prepared organic active agent 18 is injected into a high-pressure wet spraying device 20 through a liquid injection port 21, an airflow wet spraying port 19 is manually opened before liquid injection, the airflow wet spraying port 19 is closed when the liquid level of the organic active agent 18 is the same as the lower edge of the liquid injection port, the organic active agent 18 has double effects of absorbing toxic and harmful flue gas generated after blasting and improving the wetting performance of liquid on the flue gas, and the residual clean moisture enters a reservoir cavity in the upper part of the high-pressure wet spraying device 20 after flowing through the organic active agent 18.
And step four, when the pressure of the gas accumulated in the storage cavity is greater than the upper pressure-resistant limit of the gas flow wet spraying port 19, the gas flow wet spraying port 19 is automatically opened, the moisture formed by combining the gas in the storage cavity and the organic active agent 18 is sprayed to the underground blasting operation space 26 through the gas flow wet spraying port 19, and the moisture is coated with the dust after contacting the dust floating in the space, so that the dust is further settled.
In conclusion, the device disclosed by the invention utilizes the underground compressed air pipeline system which is usually equipped underground to construct the negative pressure injection device, the multistage negative pressure dust collection device and the high pressure wet spraying device, the underground high pressure air power source is sufficient, the driving system does not have mechanical motion and friction in the operation process, the device has complete intrinsic safety, the whole set of device is small in size, convenient and fast to move and simple to operate, the defects of high power consumption risk, high energy consumption and the like of the electric devices for absorbing dust by the traditional high pressure water injection pump and the electric extraction pump are eliminated, the device can realize industrial production, and is strong in practicability and can be popularized and applied.
The elimination method achieves the purpose of quickly absorbing the dense smoke dust through the negative pressure injection function, can actively intercept dust and absorb smoke gas by utilizing the multi-stage negative pressure dust absorption and high pressure wet spraying functions, can improve the moisture dust fall effect, realizes the smoke dust separation and multi-stage treatment effects, forms a comprehensive elimination method of negative pressure dust absorption, liquid dissolved smoke gas and wet spraying dust fall, overcomes the trouble of secondary harm of single smoke dust elimination, and is particularly suitable for treatment of a large amount of toxic and harmful smoke dust instantaneously generated in an underground blasting operation space.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (10)
1. The utility model provides a colliery is instantaneous smoke and dust quick elimination device in blasting operation space in pit, includes the pressurized air pipeline in the pit, its characterized in that still includes:
the negative pressure injection device comprises a negative pressure injection cavity, one side of the negative pressure injection cavity is communicated with an air inlet unit, and the other side of the negative pressure injection cavity is communicated with an air outlet unit; the bottom of the negative pressure injection cavity is provided with a negative pressure air suction port which is communicated with the negative pressure injection cavity; the air inlet unit is communicated with the underground compressed air pipeline; the underground compressed air pipeline outputs high-pressure gas to the negative pressure injection cavity through the air inlet unit;
the multi-stage negative pressure dust collection device is characterized by comprising a multi-stage negative pressure dust collection device, wherein one side of the multi-stage negative pressure dust collection device is provided with a multi-stage dust collection device interface which is communicated with the negative pressure air suction port; the other side of the multistage negative pressure dust collection device is provided with a negative pressure capturing unit, and the negative pressure capturing unit is used for sucking toxic and harmful smoke dust into the multistage negative pressure dust collection device in a rolling manner; a plurality of dust filter cores are arranged in the multistage negative pressure dust suction device at intervals and used for intercepting dust;
the side wall of the high-pressure wet spraying device is provided with a liquid injection port and a mixed high-pressure flue gas interface, and the mixed high-pressure flue gas interface is communicated with the negative-pressure injection cavity through the air outlet unit; an organic active agent is arranged in the high-pressure wet spraying device, and the organic active agent is liquid and is used for absorbing toxic and harmful flue gas; the top of the high-pressure wet spraying device is uniformly provided with a plurality of airflow wet spraying ports, and the airflow wet spraying ports are used for spraying wet air to an underground blasting operation space.
2. The device for rapidly eliminating the instantaneous smoke in the blasting operation space under the coal mine according to claim 1, wherein the air inlet unit is communicated with the underground compressed air pipeline through a first rubber pipe; the interface of the multistage dust suction device is communicated with the negative pressure air suction port through a second rubber tube; the mixed high-pressure flue gas interface is communicated with the gas outlet unit through a third rubber pipe;
preferably, the first rubber pipe, the second rubber pipe and the third rubber pipe are all high-pressure flexible rubber pipes.
3. The device for rapidly eliminating the transient smoke dust in the coal mine underground blasting operation space according to claim 2, wherein a wind pressure adjusting valve and a pressure gauge are arranged on the first rubber tube, and the wind pressure adjusting valve is used for adjusting and controlling the pressure of high-pressure gas in the negative pressure injection cavity through the reading of the pressure gauge;
preferably, the pressure of the high-pressure gas is 0.3-0.8 MPa.
4. The device for quickly eliminating the transient smoke dust in the blasting operation space of the underground coal mine according to claim 3, wherein one end of the air inlet unit is provided with an injection cavity air inlet interface, the injection cavity air inlet interface is positioned outside the negative pressure injection cavity, and the injection cavity air inlet interface is connected with the first rubber pipe; the other end of the air inlet unit is provided with an injection cavity inlet which is positioned in the negative pressure injection cavity; an air inlet hole is arranged between the inlet of the injection cavity and the air inlet interface of the injection cavity in a penetrating manner;
preferably, the sectional area of the inlet of the injection cavity is smaller than that of the air inlet interface of the injection cavity.
5. The device for rapidly eliminating the transient smoke dust in the blasting operation space of the underground coal mine according to claim 4, wherein one end of the air outlet unit is provided with an ejection cavity air outlet interface, the ejection cavity air outlet interface is positioned outside the negative pressure ejection cavity, and the ejection cavity air outlet interface is connected with the third rubber pipe; the other end of the air outlet unit is provided with an injection cavity outlet which is positioned in the negative pressure injection cavity; an air outlet hole is arranged between the outlet of the injection cavity and the air outlet interface of the injection cavity in a penetrating manner;
preferably, the sectional area of the air outlet interface of the injection cavity is larger than that of the outlet of the injection cavity; the sectional area of the outlet of the injection cavity is larger than that of the inlet of the injection cavity.
6. The device for rapidly eliminating the instantaneous smoke dust in the coal mine underground blasting operation space according to claim 1 or 2, wherein a clamping groove is formed in the multistage negative pressure dust suction device, and the dust filter element is fixed in the multistage negative pressure dust suction device through the clamping groove and used for absorbing dust; the diameters of filter holes of the dust filter element are sequentially increased along the direction from the interface of the multistage dust suction device to the negative pressure capturing unit;
preferably, the dust filter element is provided with three paths, and a first-stage dust filter element, a second-stage dust filter element and a third-stage dust filter element are respectively arranged along the direction from the interface of the multi-stage dust collection device to the negative pressure capture unit;
more preferably, the diameter of the filter hole of the primary dust filter element is 1 μm; the diameter of a filter hole of the secondary dust filter element is 5 mu m; the diameter of a filter hole of the third-level dust filter element is 10 mu m.
7. The device for rapidly eliminating the transient smoke dust in the coal mine underground blasting operation space according to claim 1 or 2, wherein the negative pressure capturing unit is horn-shaped, a negative pressure capturing cavity is formed in the negative pressure capturing unit, and the negative pressure capturing cavity is communicated with the multistage negative pressure dust suction device and is used for sucking toxic and harmful smoke dust.
8. The device for rapidly eliminating the instantaneous smoke dust in the coal mine underground blasting operation space according to claim 1 or 2, wherein a gas-liquid separation guide pipe is further arranged inside the high-pressure wet spraying device and is communicated with the mixed high-pressure flue gas interface, and the mixed gas in the negative-pressure injection cavity enters the high-pressure wet spraying device through the gas-liquid separation guide pipe;
preferably, the gas-liquid separation flow guide pipe comprises a gas inlet main pipe, two horizontal gas flow channels and two longitudinal gas flow channels, and the two horizontal gas flow channels are in cross communication; one end of the air inlet main pipe is communicated with the mixed high-pressure flue gas interface, and the other end of the air inlet main pipe is communicated with a cross point of the two horizontal airflow channels; the four longitudinal airflow channels are vertically arranged, the upper end openings of the four longitudinal airflow channels are respectively and correspondingly communicated with the ports of the horizontal airflow channel, and the four longitudinal airflow channels are arranged in a claw shape;
more preferably, the distance between the lower end opening of the longitudinal airflow channel and the bottom of the high-pressure wet spraying device is 5-10 cm;
the distance between the upper end surface of the gas-liquid separation guide pipe and the airflow wet spraying opening is 10-20 cm.
9. The device for rapidly eliminating the instantaneous smoke in the blasting operation space in the coal mine well according to claim 8, wherein the space between the upper end surface of the gas-liquid separation draft tube and the airflow wet spraying port is a storage cavity, and the storage cavity is used for accumulating clean moisture; when the pressure of the gas accumulated in the reservoir cavity is greater than the upper pressure-resistant limit of the gas flow moisture spraying opening, the gas flow moisture spraying opening is automatically opened.
10. The use method of the device for quickly eliminating the instantaneous smoke dust in the coal mine underground blasting operation space according to any one of claims 1 to 9 is characterized by comprising the following steps of:
regulating and controlling the pressure of the high-pressure gas through a wind pressure regulating valve according to the smoke concentration of an underground blasting operation space, and forming a high negative pressure environment in the negative pressure injection cavity;
secondly, high negative pressure entrainment power in the negative pressure injection cavity is transmitted to the multistage negative pressure dust collection device and a negative pressure capture cavity opening, toxic and harmful smoke dust is entrained and sucked into the multistage negative pressure dust collection device to implement smoke dust separation, dust in the smoke dust is intercepted by the plurality of dust filter cores in sequence, and the smoke after dust removal enters the negative pressure injection cavity to be mixed with high-pressure gas to form mixed gas;
step three, the mixed gas enters the high-pressure wet spraying device through the gas-liquid separation guide pipe, the mixed gas is fully mixed with the organic active agent, the toxic and harmful flue gas is fully absorbed by the organic active agent, and the residual clean moisture enters the storage cavity;
and fourthly, when the pressure of the gas accumulated in the storage cavity is greater than the upper pressure-resistant limit of the gas flow wet spraying port, the gas flow wet spraying port is automatically opened, the moisture formed after the gas in the storage cavity is combined with the organic active agent is sprayed to the underground blasting operation space through the gas flow wet spraying port, the moisture is coated with the dust after contacting the dust floating in the space, and the dust is further settled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010153534.3A CN111167225A (en) | 2020-03-06 | 2020-03-06 | Device for quickly eliminating instantaneous smoke in coal mine underground blasting operation space and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010153534.3A CN111167225A (en) | 2020-03-06 | 2020-03-06 | Device for quickly eliminating instantaneous smoke in coal mine underground blasting operation space and using method |
Publications (1)
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| CN111167225A true CN111167225A (en) | 2020-05-19 |
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| CN202010153534.3A Pending CN111167225A (en) | 2020-03-06 | 2020-03-06 | Device for quickly eliminating instantaneous smoke in coal mine underground blasting operation space and using method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112007449A (en) * | 2020-08-24 | 2020-12-01 | 浙江万源环保机械科技有限公司 | Smoke dust removal equipment for waste incineration |
| CN112502652A (en) * | 2020-11-18 | 2021-03-16 | 南京琮楷科技有限公司 | Dust falling device used in gas drilling |
-
2020
- 2020-03-06 CN CN202010153534.3A patent/CN111167225A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112007449A (en) * | 2020-08-24 | 2020-12-01 | 浙江万源环保机械科技有限公司 | Smoke dust removal equipment for waste incineration |
| CN112502652A (en) * | 2020-11-18 | 2021-03-16 | 南京琮楷科技有限公司 | Dust falling device used in gas drilling |
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