CN116482325B - Dust suppression and explosion suppression effect monitoring experiment system and experiment method for explosion impact dust emission - Google Patents
Dust suppression and explosion suppression effect monitoring experiment system and experiment method for explosion impact dust emission Download PDFInfo
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- 239000000428 dust Substances 0.000 title claims abstract description 217
- 238000004880 explosion Methods 0.000 title claims abstract description 177
- 230000001629 suppression Effects 0.000 title claims abstract description 117
- 238000002474 experimental method Methods 0.000 title claims abstract description 40
- 238000012544 monitoring process Methods 0.000 title claims description 54
- 238000000034 method Methods 0.000 title claims description 23
- 239000002817 coal dust Substances 0.000 claims abstract description 78
- 238000005507 spraying Methods 0.000 claims abstract description 47
- 239000002245 particle Substances 0.000 claims abstract description 35
- 239000007921 spray Substances 0.000 claims abstract description 19
- 230000035939 shock Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 46
- 239000003595 mist Substances 0.000 claims description 20
- 238000012806 monitoring device Methods 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 17
- 238000009792 diffusion process Methods 0.000 claims description 12
- 230000008021 deposition Effects 0.000 claims description 9
- 238000005474 detonation Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000008400 supply water Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003245 coal Substances 0.000 abstract description 5
- 238000011835 investigation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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Abstract
The invention discloses a dust suppression and explosion suppression effect investigation experiment system, relates to the technical field of dust suppression and explosion suppression, and solves the problems that the existing dust suppression and explosion suppression experiment device is single and imperfect in function and cannot measure and observe the subsequent dust suppression concentration and dust suppression effect. The invention comprises a mixing section, a rectifying section I, a measuring section I, a spraying dust fall section, a rectifying section II and a measuring section II, wherein the mixing section completes ignition explosion and impacts coal dust; the speed of the pair of shock waves of the rectifying section is reduced, so that coal dust is ensured to be uniformly distributed in the pipeline; the measuring section monitors coal dust in the pipeline; the spray dust fall section carries out first dust fall on coal dust; rectifying the second pipeline and reducing dust for the second time; and the second measuring section monitors the particle size of the coal dust in the final pipeline to obtain the dust suppression and explosion suppression experimental effect. The invention can simulate the dust raising condition after explosion impact in a coal mine tunnel, is provided with two sections of dust falling areas at the front and back, continuously falls dust from coal dust, and monitors the final dust falling effect.
Description
Technical Field
The invention relates to the technical field of dust suppression and explosion suppression, in particular to a dust suppression and explosion suppression effect monitoring experiment system and method for explosion impact dust emission.
Background
Coal is a combustible material, such as dust, which floats in air and reaches a certain concentration, and a heat source sufficient to ignite the dust can produce a dust explosion. Is one of the major disasters in the underground coal mine. The explosion wave generated by the explosion of the coal dust can raise the deposited coal dust in the roadway, and continuous explosion can occur, even the coal dust can reach all mine wells. When coal dust explodes, the explosion temperature can reach 2300-2500 ℃, the flame propagation speed can reach over 1120m/s, the shock wave speed can reach 2340m/s, and the destructive power is extremely strong. The coal dust explosion produces a large amount of carbon monoxide, the concentration of which can reach 2% -3%, and the poisoning body of the personnel can be killed.
The existing dust suppression and explosion suppression device is not widely applied to coal mine roadways, the existing dust suppression and explosion suppression experimental device is single in function, cannot simulate the dust raising condition after explosion impact, cannot measure the dust concentration in the air after dust fall, and does not form a complete dust suppression and explosion suppression effect monitoring experimental system and experimental method for explosion impact dust raising.
Disclosure of Invention
The invention aims to solve the problems that the existing dust suppression and explosion suppression experimental device has single and imperfect functions and cannot measure and observe the subsequent dust suppression concentration and dust suppression effect, and provides a dust suppression and explosion suppression effect monitoring experimental system and method for explosion impact dust emission. The invention can simulate the dust raising condition after explosion impact in a coal mine tunnel, is provided with two sections of dust falling areas at the front and back, continuously falls the coal dust, and monitors the final dust falling effect.
The invention provides a dust suppression and explosion suppression effect monitoring experiment system for explosion impact dust emission, which specifically comprises a mixing section, a rectifying section I, a measuring section I, a rectifying section II and a measuring section II, wherein the mixing section, the rectifying section I, the measuring section I, the spraying dust suppression section, the rectifying section II and the measuring section II are connected in sequence; the mixing section comprises an explosion pipeline and an explosion control and generation device, an ignition detonation area and a coal dust deposition area are arranged on the explosion pipeline, and the explosion pipeline is connected with the explosion control and generation device; the first rectifying section comprises a diffusion pipeline and a vibration buffer section and uniformly diffuses coal dust; the first measuring section comprises an air inlet pipeline, and a dust monitoring device is arranged on the first air inlet pipeline; the spraying dust fall section comprises an air inlet pipeline II, and dust is firstly reduced in the air inlet pipeline II; the second rectifying section comprises a spraying fan, and the spraying fan carries out secondary dust fall on coal dust; the second measuring section comprises an exhaust pipeline, and a dust monitoring device is arranged on the side of the exhaust pipeline to monitor the dust suppression and explosion suppression effects; the explosion pipeline, the diffusion pipeline, the vibration buffer section, the first air inlet pipeline, the second air inlet pipeline, the spray fan and the exhaust pipeline are connected in sequence.
Further, the dust monitoring device comprises a particle size measuring unit, a dust monitoring and automatic spraying controller and a Pitot tube; the Pitot tube is arranged at an inlet in the air inlet pipeline; the Pitot tube, the particle size measuring unit, the dust monitoring and automatic spraying controller and the spraying dust fall section are connected in sequence in a signal mode.
Further, the spraying dust fall section also comprises a high-pressure water supply device, a fine water mist generator and a circulating water tank, wherein the fine water mist generator is arranged at the top of the inner wall of the inlet of the air inlet pipeline and is connected with the high-pressure water supply device; the high-pressure water supply device is also connected with the circulating water tank; the other end of the circulating water tank is connected with an exhaust pipeline.
Still further, the high-pressure water supply device is also connected with a spraying fan.
Furthermore, the inside of the circulating water tank is added with a dust suppression explosion suppressant.
Furthermore, the second rectifying section further comprises an air storage tank and an air compressor, and the air compressor, the air storage tank and the spray fan are sequentially connected.
Further, the dust monitoring device comprises a dust particle size and speed measuring unit and a monitoring module, wherein the monitoring module is in signal connection with the dust particle size and speed measuring unit.
Further, the explosion control and generation device comprises an ignition energy test bed, a vacuum pump and a circulating pump, wherein the ignition energy test bed is connected with the head of the explosion pipeline, and the vacuum pump is connected with the explosion pipeline; one end of the circulating pump is connected to the rear of the ignition detonation zone, and the other end of the circulating pump is connected to the coal dust deposition zone.
Furthermore, the explosion control and generation device also comprises a methane gas cylinder, a plurality of flame sensors, a plurality of pressure sensors and an explosion control and parameter acquisition system, wherein the methane gas cylinder, the flame sensors and the pressure sensors are respectively connected with the explosion control and parameter acquisition system; a number of flame sensors and a number of pressure sensors are arranged on the detonation conduit.
The experimental method of the dust suppression and explosion suppression effect monitoring experimental system adopting the explosion impact dust emission comprises the following experimental steps:
a. The vacuum pump vacuumizes the explosion pipeline; the explosion control and parameter acquisition system sends methane in the methane cylinder into an explosion pipeline, and the circulating pump starts to circulate; the ignition energy test bed ignites methane, and the impact wave generated by explosion impacts coal dust;
b. the coal dust enters the rectifying section and uniformly diffuses into the whole pipeline;
c. The method comprises the steps that coal dust enters a first measuring section, a dust monitoring device monitors the coal dust entering, and then controls a high-pressure water supply device to supply water to a fine water mist generator, and dust is firstly reduced in a spraying dust reducing section;
d. the coal dust enters a second rectifying section after the first dust fall, and the second dust fall is started in the second rectifying section;
e. And the coal dust enters a second measuring section after twice dust fall, and the particle size and the flow velocity of the floating coal dust are monitored in the second measuring section.
The dust suppression and explosion suppression effect monitoring experiment system and method for explosion impact dust emission provided by the invention have the beneficial effects that:
(1) According to the dust suppression and explosion suppression effect monitoring experiment system and experiment method for the explosion impact raised dust, disclosed by the invention, the propagation speed of the impact wave generated by explosion can be reduced through the arranged diffusion pipeline and the vibration buffer section, so that the situation that the coal dust is not uniformly distributed due to too fast impact after the impact wave propagates to a coal dust deposition area to raise the coal dust is avoided, and the error of measured data is prevented;
(2) According to the dust suppression and explosion suppression effect monitoring experiment system and experiment method for explosion impact dust emission, the circulating pump is used for carrying out gas circulation on the explosion pipeline, so that methane gas fills the pipeline, and the influence of insufficient explosion on the dust emission is avoided;
(3) According to the dust suppression and explosion suppression effect monitoring experiment system and method for explosion impact flying dust, disclosed by the invention, double dust suppression of explosion dust is realized through the fine water mist generator and the spray fan, and double requirements of rectification and dust suppression are realized through the spray fan;
(4) According to the dust suppression effect monitoring experiment system and method for explosion impact dust emission, parameters such as the particle size and concentration of dust generated by explosion are measured through the dust monitoring device, so that the particle size of the dust is monitored in real time;
(5) According to the dust suppression and explosion suppression effect monitoring experiment system and method for explosion impact flying dust, the dust condensation and degradation process is accelerated, and the dust is reduced to move backward by adding the dust suppression and explosion suppression agent into the circulating water tank.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
In the drawings:
FIG. 1 is a schematic diagram of the overall structure of a dust suppression and explosion suppression effect monitoring experiment system for explosion impact dust emission;
FIG. 2 is a schematic structural diagram of a mixing section of a dust suppression and explosion suppression effect monitoring experiment system for explosion impact dust emission;
FIG. 3 is a schematic diagram of a first rectifying section of the experiment system for monitoring the dust suppression and explosion suppression effect of explosion impact dust emission;
fig. 4 is a schematic structural diagram of a first measurement section of the experiment system for monitoring the dust suppression and explosion suppression effect of explosion impact dust emission;
FIG. 5 is a schematic diagram of a spray dust suppression section of the dust suppression and explosion suppression effect monitoring experiment system for explosion impact dust emission according to the invention;
FIG. 6 is a schematic diagram of a second rectifying section of the experiment system for monitoring the dust suppression and explosion suppression effect of explosion impact dust emission;
FIG. 7 is a schematic diagram of a second measurement section of the experiment system for monitoring the dust suppression and explosion suppression effect of explosion impact dust emission;
Wherein: the device comprises a 1-ignition energy test bed, a 2-computer data processing system, a 3-vacuum pump, a 4-methane gas cylinder, a 5-flame sensor, a 6-explosion pipeline, a 7-pressure sensor, an 8-tripod, a 9-circulating pump, a 10-explosion control and parameter acquisition system, an 11-circuit, a 12-test bed, a 13-diffusion pipeline, a 14-vibration buffer section, a 15-particle size measurement unit, a 16-dust monitoring and automatic spray controller, a 17-air inlet pipeline I, an 18-high-pressure water supply device, a 19-tripod, a 20-pitot tube, a 21-fine water mist generator, a 22-circulating water tank, a 23-spray fan, a 24-fan support frame, a 25-gas storage tank, a 26-air compressor, a 27-dust particle size and speed measurement unit, a 28-computer, a 29-detection module, a 30-exhaust pipeline and a 31-air inlet pipeline II.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings:
The first embodiment is as follows: the present embodiment is specifically described with reference to fig. 1 to 7. The dust suppression and explosion suppression effect monitoring experiment system for explosion impact dust emission specifically comprises a mixing section, a rectifying section I, a measuring section I, a spraying dust suppression section II and a measuring section II, wherein the mixing section, the rectifying section I, the measuring section I, the spraying dust suppression section II and the measuring section II are sequentially connected; the mixing section is responsible for igniting explosion and impacting coal dust, and simulates the dust raising state of the coal dust after impact; the speed of the pair of shock waves of the rectifying section is reduced, so that the impacted coal dust can be uniformly distributed in the pipeline, and the phenomenon that the coal dust is not uniformly distributed due to too fast impact so that errors are generated in measurement data is prevented; the measuring section monitors coal dust in the pipeline; the spray dust fall section carries out first dust fall on coal dust; rectifying the second pipeline and reducing dust for the second time; and the second measuring section monitors the particle size of the coal dust in the air of the final pipeline and the flow velocity of the coal dust, so that the dust suppression and explosion suppression effect of the whole test system is obtained.
The mixing section comprises an explosion pipeline 6 and an explosion control and generation device, an ignition detonation area and a coal dust deposition area are arranged on the explosion pipeline 6, and the explosion pipeline 6 is connected with the explosion control and generation device; the first rectifying section comprises a diffusion pipeline 13 and a vibration buffer section 14, the vibration buffer section 14 is a conical pipeline, and the diffusion pipeline 13 is connected with one end of the vibration buffer section 14 with a small opening diameter; the first measuring section comprises a first air inlet pipeline 17, a dust monitoring device is arranged on the first air inlet pipeline 17, the spraying dust fall section comprises a second air inlet pipeline 31, the dust monitoring device monitors the coal dust condition in the experimental pipeline, and the spraying dust fall section is controlled to carry out first dust fall on the coal dust in the second air inlet pipeline 31; the second rectifying section comprises a spraying fan 23, the spraying fan 23 carries out secondary dust fall on coal dust, and the spraying fan 23 is a zero-consumption electric-liquid linkage spraying fan; the second measuring section comprises an exhaust pipeline 30, and a dust monitoring device is arranged on the side of the exhaust pipeline 30 to monitor the particle size of coal dust in the pipeline, so that the dust suppression and explosion suppression effect of the test system is obtained; the explosion pipeline 6, the diffusion pipeline 13, the vibration buffer section 14, the first air inlet pipeline 17, the second air inlet pipeline 31, the spray fan 23 and the exhaust pipeline 30 are sequentially connected, the explosion pipeline 6 is supported by the triangular frames 8, the first air inlet pipeline 17, the second air inlet pipeline 31 and the exhaust pipeline 30 are supported by the triangular frames 19, and the spray fan 23 is supported by the fan support frames 24.
The dust monitoring device arranged on the first air inlet pipeline 17 comprises a particle size measuring unit 15, a dust monitoring and automatic spraying controller 16 and a Pitot tube 20; the Pitot tube 20 is arranged at the position of the inlet inside the first air inlet pipeline 17; the Pitot tube 20, the particle size measuring unit 15, the dust monitoring and automatic spraying controller 16 are sequentially in signal connection through a line 11; the particle size measuring unit 15 is an APS3321 aerodynamic particle size spectrometer; when the particle size measuring unit 15 monitors that the coal dust enters the first air inlet pipeline 17, a signal is sent to the dust monitoring and automatic spraying controller 16, and the dust monitoring and automatic spraying controller 16 controls the spraying dust fall section to carry out first dust fall on the inside of the second air inlet pipeline 31.
The spray dust fall section also comprises a high-pressure water supply device 18, a fine water mist generator 21 and a circulating water tank 22, wherein the fine water mist generator 21 is arranged at the top of the inner wall of the inlet of the air inlet pipeline 17 and is connected with the high-pressure water supply device 18; one end of the circulating water tank 22 is connected with the high-pressure water supply device 18, and the other end of the circulating water tank is connected with a dust sampling measurement position of an experimental pipeline outlet behind the exhaust pipeline 30, so that water circulation in the system is realized; the high-pressure water supply device 18 is in signal connection with the dust monitoring and automatic spraying controller 16, when coal dust is monitored in the air inlet pipeline 17, the dust monitoring and automatic spraying controller 16 controls the high-pressure water supply device 18 to pump water from the circulating water tank 22 and supply the water into the fine water mist generator 21, and the fine water mist generator 21 generates water mist to carry out first dust fall on the air inlet pipeline 17; the high-pressure water supply device 18 is also connected with a spray fan 23 through a water pipe.
The circulating water tank 22 is a self-adding circulating water tank with dust suppression and explosion suppression agent, the dust suppression and explosion suppression agent is added in the circulating water tank, and the dust suppression and explosion suppression effect on coal dust is enhanced by adding the dust suppression and explosion suppression agent.
The second rectifying section further comprises an air storage tank 25 and an air compressor 26, and the air compressor 26, the air storage tank 25 and the spray fan 23 are connected through an air pipe in sequence; meanwhile, the spraying fan 23 is connected with the high-pressure water supply device 18, dust-settling water is provided for the spraying fan 23 through the high-pressure water supply device 18, and the spraying fan 23 can also rectify air flow, so that follow-up observation is facilitated; the spraying fan 23 is a zero-consumption electric-hydraulic linkage spraying fan.
The dust monitoring device comprises a dust particle size and speed measuring unit 27 and a monitoring module 29, wherein the monitoring module 29 is in signal connection with the dust particle size and speed measuring unit; the particle size and the flowing speed of the coal dust in the exhaust pipeline 30 are monitored in real time through the monitoring module 29, and the result is fed back to the particle size and speed measuring unit 27 and finally collected into the computer 28.
The dust particle diameter and speed measuring unit 27 is a laser doppler particle diameter and speed measuring instrument.
The explosion control and generation device comprises an ignition energy test bed 1, a vacuum pump 3 and a circulating pump 9, wherein the ignition energy test bed 1 is connected with the head of an explosion pipeline 6; the vacuum pump 3 is connected with the explosion pipeline 6 and is used for vacuumizing the interior of the explosion pipeline 6; one end of the circulating pump 9 is connected to the rear of the ignition detonation zone, and the other end of the circulating pump is connected to the coal dust deposition zone, so that the gas in the explosion pipeline 6 is circulated, and the uniform mixing of methane gas is ensured. The ignition energy test bed 1 adopts a TYT-1 ignition energy test bed.
The explosion control and generation device also comprises a computer data processing system 2, a methane gas cylinder 4, a plurality of flame sensors 5, a plurality of pressure sensors 7 and an explosion control and parameter acquisition system 10, wherein the methane gas cylinder 4, the plurality of flame sensors 5 and the plurality of pressure sensors 7 are respectively connected with the explosion control and parameter acquisition system 10, and the explosion control and parameter acquisition system 10 is connected with the computer data processing system 2; a number of flame sensors 5 and a number of pressure sensors 7 are arranged on the detonation conduit 6. The computer data processing system 2 controls the supply of methane gas in the explosion pipeline 6 through the explosion control and parameter acquisition system 10, and acquires various parameters in the explosion pipeline 6 during explosion.
The experimental method of the dust suppression and explosion suppression effect monitoring experimental system adopting the explosion impact dust emission comprises the following specific experimental steps:
a. The vacuum pump 3 vacuumizes the explosion pipeline 6; the explosion control and parameter acquisition system 10 sends methane in the methane cylinder 4 into the explosion pipeline 6, and the circulating pump 9 starts circulating the gas in the explosion pipeline 6; the ignition energy test bed 1 ignites methane, and shock waves generated by methane explosion impact coal dust, so that flying dust is generated;
b. The coal dust enters the first rectifying section and is uniformly diffused into the whole pipeline through the diffusion pipeline 13 and the vibration buffer section 14;
c. The coal dust enters the first measuring section, the dust monitoring device monitors the coal dust entering and then controls the high-pressure water supply device 18 to supply water to the fine water mist generator 21, and the fine water mist generator 21 starts to carry out first dust fall on the coal dust in the spraying dust fall section;
d. The coal dust enters a rectifying section II after the first dust fall, airflow in the pipeline is rectified in the rectifying section II through a spraying fan 23 and sprayed into the coal dust again, and the second dust fall is started;
e. And the coal dust enters a second measuring section after twice dust fall, and the particle size and the flow velocity of the floating coal dust are monitored in the second measuring section, so that the final dust suppression and explosion suppression test effect is obtained.
The experimental process of the dust suppression and explosion suppression effect monitoring experimental system for explosion impact dust emission comprises the following steps:
Firstly, vacuumizing the inside of an explosion pipeline 6 through a vacuum pump 3, pumping methane gas in a methane gas cylinder 4 into the inside of the explosion pipeline 6 through an explosion control and parameter acquisition system 10 by a computer data processing system 2, and circulating the gas in the explosion pipeline 6 through a circulating pump 9 to uniformly distribute the methane gas into the explosion pipeline 6; after the gas distribution is uniform, the ignition energy test bed 1 ignites and detonates the gas in the explosion pipeline 6, a plurality of flame sensors 5 and a plurality of pressure sensors 7 collect explosion process parameters, and the explosion process parameters are collected into the computer data processing system 2 through the explosion control and parameter collection system 10; the shock wave generated after the gas explosion impacts the coal dust arranged in the coal dust deposition area at the rear part of the explosion pipeline 6, so as to simulate the dust raising state, and the raised coal dust is uniformly diffused into the pipeline through the diffusion pipeline 13 and the vibration buffer section 14; the coal dust enters an air inlet pipeline 17 of the first measuring section, after the dust monitoring and automatic spraying controller 16 detects that the coal dust passes, a signal is sent to the high-pressure water supply device 18, and the fine water mist generator starts to carry out first dust fall on the coal dust in the pipeline; the mixed gas of coal dust mixed with water mist enters a second rectifying section, the gas is rectified through a spray fan 23, water mist is added into the pipeline again to carry out secondary dust fall, and the spray fan 23 is used for promoting the full mixing between the coal dust and the water mist, so that the dust fall effect is enhanced; after twice dust fall, the dust enters a second measuring section, a monitoring module 29 monitors the particle size of the coal dust and the flowing speed of the coal dust in an exhaust pipeline 30, the result is fed back to a dust particle size and speed measuring unit 27, and the dust particle size and speed measuring unit 27 finally gathers the dust particle size and speed measuring unit into a computer 28; sampling and measuring coal dust behind the exhaust duct 30; in the whole experiment process, the circulating water tank 22 supplies water to the high-pressure water supply device 18, and the tail end of the experiment pipeline behind the exhaust pipeline 30 recovers dust-settling water to realize water circulation.
Summarizing the above embodiment, according to the dust suppression and explosion suppression effect monitoring experiment system and experiment method for explosion impact raised dust, the propagation speed of impact waves generated by explosion can be reduced through the diffusion pipeline 13 and the vibration buffer section 14, and the situation that the coal dust is not uniformly distributed due to too fast impact after the impact waves are propagated to a coal dust deposition area to raise the coal dust is avoided, so that errors of measured data are prevented; according to the dust suppression and explosion suppression effect monitoring experiment system and experiment method for explosion impact dust emission, the circulating pump 9 is used for carrying out gas circulation on the explosion pipeline 6, so that methane gas fills the pipeline, and the influence of insufficient explosion on the dust emission is avoided; according to the dust suppression and explosion suppression effect monitoring experiment system and experiment method for explosion impact flying dust, dual dust suppression of explosion dust is realized through the fine water mist generator 21 and the spray fan 23, and dual requirements of rectification and dust suppression are realized through the spray fan 23; according to the dust suppression effect monitoring experiment system and method for explosion impact dust emission, parameters such as the particle size and concentration of dust generated by explosion are measured through the dust monitoring device, so that the particle size of the dust is monitored in real time; according to the dust suppression and explosion suppression effect monitoring experiment system and method for explosion impact flying dust, the dust condensation and drop process is accelerated and the dust movement to the rear is reduced by adding the dust suppression and explosion suppression agent into the circulating water tank 22.
The above specific embodiments are used for further detailed description of the objects, technical solutions and advantageous effects of the present invention. It should be understood that the foregoing description is only a specific example of the present invention, and is not intended to limit the invention, but rather is a reasonable combination of features described in the foregoing embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. Dust suppression and explosion suppression effect monitoring experiment system for explosion impact dust emission is characterized in that: the device comprises a mixing section, a first rectifying section, a first measuring section, a spraying dust fall section, a second rectifying section and a second measuring section, wherein the mixing section, the first rectifying section, the first measuring section, the spraying dust fall section, the second rectifying section and the second measuring section are sequentially connected;
The mixing section comprises an explosion pipeline (6) and an explosion control and generation device, an ignition detonation area and a coal dust deposition area are arranged on the explosion pipeline (6), and the explosion pipeline (6) is connected with the explosion control and generation device; the first rectifying section comprises a diffusion pipeline (13) and a vibration buffer section (14) for uniformly diffusing coal dust; the first measuring section comprises a first air inlet pipeline (17), and a dust monitoring device is arranged on the first air inlet pipeline (17); the spraying dust fall section comprises a second air inlet pipeline (31), and dust is firstly reduced in the second air inlet pipeline (31); the second rectifying section comprises a spraying fan (23), and the spraying fan (23) rectifies coal dust and reduces the dust for the second time; the second measuring section comprises an exhaust pipeline (30), and a dust monitoring device is arranged on the side of the exhaust pipeline (30) to monitor the dust suppression and explosion suppression effects; the explosion pipeline (6), the diffusion pipeline (13), the vibration buffer section (14), the first air inlet pipeline (17), the second air inlet pipeline (31), the spray fan (23) and the exhaust pipeline (30) are sequentially connected;
The spraying dust fall section further comprises a high-pressure water supply device (18), a fine water mist generator (21) and a circulating water tank (22), wherein the fine water mist generator (21) is arranged at the top of the inner wall of the inlet of the air inlet pipeline II (31) and is connected with the high-pressure water supply device (18); the high-pressure water supply device (18) is also connected with the circulating water tank (22); the other end of the circulating water tank (22) is connected with an exhaust pipeline (30);
The dust monitoring device comprises a particle size measuring unit (15), a dust monitoring and automatic spraying controller (16) and a Pitot tube (20); the Pitot tube (20) is arranged at the inner inlet of the first air inlet pipeline (17); the Pitot tube (20), the particle size measuring unit (15), the dust monitoring and automatic spraying controller (16) and the spraying dust fall section are connected in sequence in a signal mode;
The explosion control and generation device comprises an ignition energy test bed (1), a vacuum pump (3) and a circulating pump (9), wherein the ignition energy test bed (1) is connected with the head of an explosion pipeline (6), and the vacuum pump (3) is connected with the explosion pipeline (6); one end of the circulating pump (9) is connected to the rear part of the ignition detonation zone, and the other end of the circulating pump is connected to the coal dust deposition zone;
the high-pressure water supply device (18) is in signal connection with the dust monitoring and automatic spraying controller (16) and is also connected with the spraying fan (23);
The explosion control and generation device further comprises a methane gas cylinder (4), a plurality of flame sensors (5), a plurality of pressure sensors (7) and an explosion control and parameter acquisition system (10), wherein the methane gas cylinder (4), the plurality of flame sensors (5) and the plurality of pressure sensors (7) are respectively connected with the explosion control and parameter acquisition system (10); a number of flame sensors (5) and a number of pressure sensors (7) are arranged on the explosion tube (6).
2. The experimental system for monitoring the dust suppression and explosion suppression effect of explosion impact dust emission according to claim 1, which is characterized in that: the inside of the circulating water tank (22) is added with a dust suppression and explosion suppression agent.
3. The dust suppression and explosion suppression effect monitoring experiment system for explosion impact dust emission according to claim 1 or 2, wherein: the second rectifying section further comprises an air storage tank (25) and an air compressor (26), and the air compressor (26), the air storage tank (25) and the spraying fan (23) are sequentially connected.
4. The experimental system for monitoring the dust suppression and explosion suppression effect of explosion impact dust emission according to claim 1, which is characterized in that: the dust monitoring device comprises a dust particle size and speed measuring unit (27) and a monitoring module (29), and the monitoring module (29) is connected with the dust particle size and speed measuring unit through signals.
5. An experimental method of a dust suppression and explosion suppression effect monitoring experimental system adopting the explosion impact dust emission according to claim 1, which is characterized in that: the method comprises the following steps:
a. The vacuum pump (3) vacuumizes the explosion pipeline (6); the explosion control and parameter acquisition system (10) sends methane in the methane cylinder (4) into the explosion pipeline (6), and the circulating pump (9) starts to circulate; the ignition energy test bed (1) ignites methane, and shock waves generated by explosion impact coal dust;
b. the coal dust enters the rectifying section and uniformly diffuses into the whole pipeline;
c. the method comprises the steps that coal dust enters a first measuring section, a dust monitoring device monitors the coal dust entering, and then controls a high-pressure water supply device (18) to supply water to a fine water mist generator (21), and dust is firstly reduced in a spraying dust reducing section;
d. the coal dust enters a second rectifying section after the first dust fall, and the second dust fall is started in the second rectifying section;
e. And the coal dust enters a second measuring section after twice dust fall, and the particle size and the flow velocity of the floating coal dust are monitored in the second measuring section.
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