CN104390898A - Simulation experiment device for spraying and dust-settling law under airflow field and experimental method of simulation experiment device - Google Patents
Simulation experiment device for spraying and dust-settling law under airflow field and experimental method of simulation experiment device Download PDFInfo
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Abstract
The invention discloses a simulation experiment device for a spraying and dust-settling law under an airflow field and an experimental method of the simulation experiment device. In the experiment process, a stable airflow field is formed in the simulation experiment device through an exhaust fan; dust is conveyed into the simulation experiment device through a dust conveying device under the effect of the airflow; stable water mist is formed in the simulation experiment device through a spray nozzle on a spraying rod which is connected with a water supply pump; fogdrop particle size and fogdrop speed as well as the concentration of the dust before and after passing by a fogdrop field on different measuring points under different situations are respectively measured by adopting a laser fogdrop particle size measurer and a PM2.5 dust sampler, and the data is transmitted to a computer, so that the relation among the particle speed, the particle size and the concentration in the coupling process of the dust and fogdrop can be obtained. The simulation experiment device and the experiment method have the characteristics of high simulation degree, accurate, trustful and reliable experiment results, compactness in structure, simplicity and convenience in experiment operation, flexibility in adjustment and the like.
Description
Technical field
The present invention relates to a kind of analogue experiment installation and experimental technique thereof, particularly relate to analogue experiment installation and the experimental technique thereof of atomizing de-dusting rule under a kind of wind flow field.
Background technology
In recent years, along with the raising of coal in China industry mechanization degree, getting working face high concentrate dust problem is more and more serious.Survey factually, when not taking any dust prevention, the dust concentration that fully mechanized workface is met head on is 1200 ~ 1500mg/m
3, individually up to 3000mg/m
3left and right; In coal-face, the dust concentration of general fully-mechanized mining working can reach 2500 ~ 3000mg/m
3, and the concentration of respirable dust in dust is close to 40%.High concentrate dust not only can cause occupational illness, also may cause causing mine dust explosion accident, drastically influence the safety in production of mine.
At present, for underground coal mine getting working face high concentrate dust, conventional control measures mainly spray for dust suppression, in spray for dust suppression process the particle size of droplet particle and the influential effect of speed to spray for dust suppression remarkable.
Therefore, strengthen droplet in spray for dust suppression process-dust granules coupling settlement law study, the efficiency of dust collection tool strengthening spray for dust suppression is of great significance.
Summary of the invention
An object of the present invention is, the analogue experiment installation of atomizing de-dusting rule under a kind of wind flow field is provided, for dirt-mist particle coupling settlement rule in research spray for dust suppression process, for nozzle in spray for dust suppression technology implementation process select, the determination etc. of nozzle arrangement mode and atomisation pressure provides reliable theories integration.
The technical scheme that the present invention is adopted for achieving the above object is, the analogue experiment installation of atomizing de-dusting rule under a kind of wind flow field, it is characterized in that, comprise and send out a dirt device, tunnel analogue means, ventilation unit, tunnel environment determinator, spraying plant, mist droplet particle size determinator, test waste treatment device and be arranged on the computing machine of device outside; Wherein:
Described dirt device is positioned at the air intake vent place of tunnel analogue means, for quantitatively producing dust in the analogue means of tunnel, for dirt-mist particle coupling settlement experiment provides dust, is the dirt source of this device;
Described tunnel analogue means is the seal chamber of a both ends open, comprises air inlet, wind inlet section, diffuser, stable section, contraction section and air outlet successively from left to right;
The central point of described air inlet, wind inlet section, diffuser, stable section, contraction section and air outlet is positioned on same axis;
The left side of described wind inlet section is air inlet, and the right side of described contraction section is air outlet;
Described diffuser flare shape, from left to right successively by carefully thicker;
Described contraction section is inverted tubaeform shape, successively from the coarse to fine from left to right;
Described stable section from left to right thickness is consistent;
Described dirt device is arranged on the side outside the air inlet of described tunnel analogue means;
Described air outlet is connected with sucktion fan, and described sucktion fan is driven by the buncher of a band frequency converter;
The front-rear side walls of described stable section offers respectively the first light hole and the second light hole, the distance between the center of described first light hole and the edge, the end of front side wall is 30cm, and the distance between the center of described second light hole and the edge, top of rear wall is 30cm;
Described first light hole and the second light hole place are provided with eyeglass respectively, and the seam crossing between described eyeglass and described sidewall seals; The generator of described laser mist droplet particle size analyzer and receiver are separately positioned on outside described first light hole and the second light hole;
Described laser mist droplet particle size analyzer is for measuring the speed of the inner dirt-mist particle of described tunnel analogue means, granularity and concentration, and the data detected are transferred to described computing machine, draw particle speed in dust and droplet coupling process, relation between granularity and concentration by described computing machine;
The bottom of described stable section is provided with the drainage pipeline for getting rid of experiment sewage;
Described stable section inner roof wall is longitudinally hung with a slide bar, and described slide bar is positioned at directly over described axis, and described tunnel environment determinator is suspended on described slide bar;
Described tunnel environment determinator comprises airflow velocity analyzer, barometer and PM 2.5 dust sampler for measuring dust concentration in the analogue means of tunnel;
Described airflow velocity analyzer, barometer and dust sampler quantity are some;
Described slide bar being hung with respectively three can along slide bar grid-shaped metal frame in axial sliding, on the grid-shaped metal frame that described airflow velocity analyzer is fixed therein in the mode be evenly arranged, described barometer and PM 2.5 dust sampler are fixed on two other grid-shaped metal frame in the mode be evenly arranged respectively;
Described spraying plant comprises the water tank, make-up pump and the spray lance that connect in turn, described spray lance is provided with the nozzle of some quantity;
It is inner that described spray lance is arranged on tunnel analogue means in the mode that can move up and down, and sprayed with mist by the water of nozzle by make-up pump feed, forms droplet field in described tunnel analogue means inside;
Described experiment waste treatment device comprises water smoke treating apparatus and waste water purification device;
Described water smoke treating apparatus comprises a mist eliminator, and described mist eliminator is connected with the air outlet of described sucktion fan, carries out demist process for the gas-vapor mix of being extracted out by described sucktion fan, and will be discharged to outside laboratory by air duct by the air after demist;
Described waste water purification device is connected by the drain pipe port of drainage pipeline with analogue means diapire place, described tunnel, for grain diameter in the spraying condensate water of analogue means inside, described tunnel is greater than 1um the whole purified treatment of impurity after, be discharged to outside laboratory.
As preferably, above-mentioned tunnel analogue means length is 11m, and wherein, wind inlet section length is 1m, is 1.5m with the cross section length of side in the vertical direction of described axis; Diffuser length is 3m, and the spread angle of diffuser is 14 degree; Stable section length is 6m, is 3m with the cross section length of side in the vertical direction of described axis; Contraction section length is 1m, and angle of throat is 51 degree;
Described tunnel analogue means is framed structure, and its support frame material is steel, and the material of remainder is organic glass, and the thickness of described organic glass is 2 ~ 3cm.
Further preferably, the measurable maximum spray field diameter of above-mentioned laser mist droplet particle size analyzer is 4m, and measurable size droplet diameter is of a size of 0.5-2000 μm, and grain diameter measurement accuracy is 0.5 μm, and velocity survey scope is 100-300m/s, and accuracy is 1m/s;
The rated operating pressure of described make-up pump is 28Mpa;
Described airflow velocity analyzer is impeller airflow velocity analyzer, and its model is AVM-01, and the wind speed range that can measure is 0 ~ 10m/s;
Described dirt device is SAG420 aerosol generator, and its dust granules particle size range produced is 0 ~ 200 μm; Be 1g/cm by soot density
3meter, the dust flow range that SAG420 aerosol generator produces is 0 ~ 12kg/h;
Described sucktion fan is axial flow blower, and its rated power is 15kw, rated flow is 20m
3/ s;
Described frequency converter is G/P type high performance universal vector frequency converter, and its rated voltage is 380V, and rated power is 75KW.
Further preferably, above-mentioned wind inlet section, diffuser, stable section and contraction section are square on edge with the cross section in the vertical direction of described axis;
The below of described wind inlet section is provided with wind inlet section support, and the below of described stable section is provided with stable section support, and described wind inlet section support and stable section support are provided with the adjusting bolt for highly regulating;
The front side wall of described stable section is also provided with a manhole.
Further preferably, the quantity of above-mentioned airflow velocity analyzer, barometer and dust sampler is 9.
Further preferably, the analogue experiment installation of atomizing de-dusting rule under above-mentioned wind flow field, also includes tripod base, and described dirt device is placed on described tripod base.
The technique effect that technique scheme is directly brought is, on the one hand, send out dirt device and quantitatively produce dust, sucktion fan can ensure that analogue means inside, tunnel has certain wind speed, dust under wind action to tunnel analogue means internal divergence, the droplet that nozzle produces and dust combine, and can determine dirt-mist grain diameter and concentration by laser mist droplet particle size analyzer and PM 2.5 dust sampler;
On the other hand, main detecting instrument: airflow velocity analyzer, barometer and the PM 2.5 dust sampler quantity for measuring dust concentration in the analogue means of tunnel are some; Mounting means employing is hung with three respectively on slide bar can along slide bar grid-shaped metal frame in axial sliding, wherein, on the grid-shaped metal frame that airflow velocity analyzer is fixed therein in the mode be evenly arranged, barometer and PM 2.5 dust sampler are fixed on two other grid-shaped metal frame in the mode be evenly arranged respectively.Adopt this version, make analogue experiment installation in experimentation, the basic data detected is comprehensive, true, reliable, ensure that authenticity and the accuracy of simulated experiment result.
And it is inner that spray lance is arranged on tunnel analogue means in the mode that can move up and down, and sprayed with mist by the water of nozzle by make-up pump feed, form droplet field in tunnel analogue means inside; Sucktion fan is driven by the buncher of a band frequency converter, regulates motor speed by frequency converter, and then regulates the employing of the series technique means such as size of blower fan output power, makes whole analogue experiment installation have higher " fidelity ";
By the flexible of wind speed air quantity, the moving freely of spray lance position, in conjunction with the use of different model specification nozzle, make analogue experiment installation of the present invention can be determined at dirt-mist particle coupling settlement rule under different wind speed, for the determination of preferred, the atomisation pressure of nozzle kind in atomizing de-dusting process and research and development spraying apparatus, the dust-laying effect that detects spraying apparatus provide reliable theories integration;
Moreover, above-mentioned analogue experiment installation compact conformation, rationally.The pollutants such as the waste water produced in experimentation, fog carry out harmless treatment by the purification of device self, treating apparatus, thus avoid environmental pollution.
Two of object of the present invention is, provides the experimental technique of the analogue experiment installation of atomizing de-dusting rule under a kind of above-mentioned wind flow field.
The technical scheme that the present invention is adopted for achieving the above object is, under a kind of wind flow field, the experimental technique of the analogue experiment installation of atomizing de-dusting rule, is characterized in that, comprises the following steps:
The first step, starts sucktion fan, and the data that observation airflow velocity analyzer and barometer collect regulate the output power of sucktion fan, until form stable wind flow field in analogue experiment installation by frequency converter;
Second step, starts and sends out a dirt device, under the effect of air-flow, carry dust in analogue experiment installation, and record PM 2.5 dust sampler and collect dust concentration data;
3rd step, adjustable spraying bar orientation, opens make-up pump, forms stable water smoke in analogue experiment installation;
4th step, by laser mist droplet particle size analyzer by the speed of the inner dirt-mist particle of tunnel analogue means that measures, granularity and concentration, and send data to described computing machine, draw particle speed in dust and droplet coupling process, relation between granularity and concentration by computing machine;
5th step, experimentally need, timely adjustment sucktion fan output power, make-up pump top hole pressure and spray lance orientation, under measuring different situations respectively by laser mist droplet particle size analyzer and PM 2.5 dust sampler, the mist droplet particle size at different measuring points place and droplet velocities and by the dust concentration before and after droplet field, and send data to described computing machine, particle speed in dust and droplet coupling process, relation between granularity and concentration is drawn, until experiment terminates by computing machine.
The technique effect that technique scheme is directly brought is, experimental implementation is easy, flexible adjustment.
In sum, the present invention, relative to prior art, has in simulated experiment process that fidelity is high, experimental result is accurate, true and reliable, and the beneficial effect such as apparatus structure is compact, experimental implementation is easy, flexible adjustment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the analogue experiment installation of atomizing de-dusting rule under wind flow field of the present invention.
Description of reference numerals: 1-sends out dirt device; 2-air inlet; 3-wind inlet section; 4-diffuser; 5-barometer; 6-airflow velocity analyzer; 7-stable section; 8-spray lance; 9-slide bar; 10-PM 2.5 dust sampler; 11-contraction section; 12-air outlet; 13-sucktion fan; 14-mist eliminator; 15-frequency converter; 16-water quality purifying treater; 17-manhole; 18-laser mist droplet particle size analyzer; 19-computing machine; 20-make-up pump; 22-water tank; 23-stable section support; 24-wind inlet section support; 25-bolt of lower base; 26-tripod base.
Embodiment
Below in conjunction with drawings and Examples, the analogue experiment installation of atomizing de-dusting rule under wind flow field of the present invention is described in detail.
As shown in Figure 1, the analogue experiment installation of atomizing de-dusting rule under wind flow field of the present invention, tunnel analogue means mainly comprises wind inlet section 3, diffuser 4, stable section 7 and contraction section 11, wind inlet section 3 is provided with air intake vent 2, contraction section 7 is provided with air outlet 12, at air outlet 12 place, sucktion fan 13 is installed, ensure to have in tunnel analogue means stable distinguished and admirable, utilize barometer 5, airflow velocity analyzer 6, PM 2.5 dust sampler 10, the air pressure that PDI200MD laser mist droplet particle size analyzer 18 pairs of tunnel analogue means are inner distinguished and admirable, wind speed, the parameters such as the particle diameter of dust and droplet particle and concentration measure.
As shown in Figure 1, under wind flow field atomizing de-dusting rule analogue experiment installation in analogue means front portion, tunnel be air intake vent 2, air intake vent 2 place is provided with sends out dirt device 1, rear portion air outlet 12 place is connected with sucktion fan 13, middle part has laser channeling and is provided with the manhole 17 of coming in and going out for testing crew for one, and analogue means inside in tunnel is provided with barometer 5, airflow velocity analyzer 6 and PM 2.5 dust sampler 10 for measuring blast, wind speed and dust concentration in the analogue means of tunnel and the drainage pipeline for getting rid of sewage in the analogue means of tunnel.
This analogue experiment installation also comprises the sucktion fan 13 for ensureing the inner wind speed of tunnel analogue means, for providing water tank 22 and the pressue device 20 of spraying water.It is inner that barometer 5, airflow velocity analyzer 6 and PM 2.5 dust sampler 10 are arranged in tunnel analogue means according to certain section arrangement and distance; Sucktion fan 13 is placed in analogue means air outlet 12 place, tunnel; Water tank 22 and pressue device 20 are positioned at analogue means side, tunnel; Drainage pipeline is positioned at bottom the analogue means of tunnel.As can be seen here, distinguished and admirable being entered by air intake vent 2 of sucktion fan 13 generation, discharged by air outlet 12, thus it is stable distinguished and admirable to make analogue means inside in tunnel produce, send out dirt device 1 and produce certain density dust, dust flows to into tunnel analogue means inner with the wind, meanwhile, nozzle on the spray lance 8 of tunnel analogue means hangs inside sprays water smoke downwards, droplet and dust coupling settlement in wind flow field, barometer 5 in the process, airflow velocity analyzer 6, PM 2.5 dust sampler 10 and laser mist droplet particle size analyzer 18 can to the inner blast of tunnel analogue means, wind speed, dust concentration, the parameters such as mist droplet particle size measure, by carrying out statistical study to these parameters, draw the best sedimentation mist droplet particle size that different-grain diameter dust is corresponding, investigate the otherness of nozzle spray effect under different wind friction velocity, test dissimilar nozzle to the impact of dust-laying effect, preferred for nozzle kind in atomizing de-dusting process, the determination of atomisation pressure and research and development spraying apparatus, the dust-laying effect detecting spraying apparatus provides reliable technical support.
As shown in Figure 1, under wind flow field atomizing de-dusting rule analogue experiment installation in tunnel analogue means be provided with air intake vent 2 and air outlet 12, wherein, air intake vent 2 place arrange send out a dirt device 1, air outlet 12 connects sucktion fan 13.
Stable section 7 inside of tunnel analogue means is provided with slide bar 9, spray lance 8, barometer 5, airflow velocity analyzer 6, PM 2.5 dust sampler 10, and bottom is provided with adjustable trestle 23.
Further, tunnel analogue means is made up of the organic glass of thickness 2 ~ 3cm, and inside steel skeleton supports, and this device is divided into wind inlet section 3, diffuser 4, stable section 7 and contraction section 11 successively from air intake vent 2 to air outlet 12, and cross section is square.Wherein, air intake segment length is 1m, and the length of side is 1.5m, and diffusion segment length is 3m, and spread angle is 14 °, and stablizing segment length is 6m, and the length of side is 3m, and contraction segment length is 1m, and angle of throat is 51 °.
As shown in Figure 1, the front-rear side walls of stable section 7 offers the first light hole and the second light hole respectively, distance between the center of described first light hole and the edge, the end of front side wall is 30cm, and the distance between the center of described second light hole and the edge, top of rear wall is 30cm; Line between above-mentioned first light hole and the second light hole central point is the laser via of laser mist droplet particle size analyzer 18, and the generating laser of laser mist droplet particle size analyzer 18 and receptacle be the corresponding two-end-point position being arranged on this laser via respectively.
Further, inner at tunnel analogue means stable section, prolong tunnel analogue means trend apart from top 0.2m and the long slide bar 9 of a 4-5m is set, be used for mobile PM 2.5 dust sampler 10, wherein, particle sampler has 9, according to upper, under, left, right, in arrange, sampling thief around on four edges line each other distance is 0.5m, totally 8, in addition, in middle position, a sampling thief is set again, be suspended on after being fixed on slide bar 9 for measuring the dust concentration of different section and same section diverse location in the analogue means stable section of tunnel, for the determination of dirt-mist particle coupling settlement rule provides support.
Further, on the slide bar 9 of tunnel analogue means stable section, also need barometer 5 and airflow velocity analyzer 6 are installed, wherein the number of barometer 5 and airflow velocity analyzer 6 and arrangement identical with PM 2.5 dust sampler 10, be fixed rear-mounted on slide bar 9, for measuring blast and the wind speed of tunnel analogue means stable section different section and same section diverse location, for the determination of dirt under different wind friction velocity-mist particle coupling settlement rule provides support.
Further, longitudinally setting one spray lance 8 is also needed apart from 0.2m place, top along tunnel analogue means in tunnel analogue means stable section 7, the diameter of spray lance 8 is 5-10cm, spray lance 8 is installed 3-5 nozzle to spray, spray lance can realize front and back and move up and down, to measure the spray effect of nozzle when diverse location.
Further, in distance, analogue means 2m place, tunnel arranges pressue device and make-up pump 20, a water tank 22 is placed on make-up pump 20 side, the pressure limit that make-up pump 20 can provide is 0 ~ 28Mpa, the cube water tank of water tank 22 to be length of sides be 1m, is made with iron sheet, enters in spray lance 8 after the water in water tank 22 is pressurizeed by make-up pump 20 by water inlet pipe, water inlet pipe connection traffic-pressure double-purpose water meter, does technical support for realizing the preferred different size hydraulic pressure of best spray effect.
Further, open every 0.3m the circular circular hole totally 10 that a radius is 2cm bottom tunnel analogue means stable section 7, riveted joint is used to be arranged on bottom the analogue means stable section of tunnel by the U-shaped drainage pipeline that 3-4m is long, the sewage produced in experimentation flows into drainage pipeline by circular hole, and connect waste pipe in drainage pipeline rear end, sewage is introduced water quality purifying treater 16, purified treatment discharge is carried out to sewage, avoid causing environmental pollution.
Further, tunnel analogue means support is divided into wind inlet section support 24 and stable section support 23, wherein, totally 1, wind inlet section support 24, totally 4, stable section support 23, all make with iron plate, wind inlet section bracket tray is rectangle, thickness is 5cm, length 1.6m, width is 0.5m, support height is 85cm, bracket base erection bolt 25, the height of empirical model is regulated by bolt, stable section bracket tray thickness is 5cm, length is 3.1m, width is 0.5m, be highly 10cm, erection bolt, the height of empirical model is regulated by bolt, by regulating bracket base bolt, tunnel analogue means is made to be 3 °-5 ° inclinations, the sewage be convenient in the analogue means of tunnel flows into drainage pipeline.
Further, in tunnel, analogue means contraction section 11 air outlet 12 place arranges sucktion fan 13, and adopts fluid sealant to seal junction, prevents from leaking out.Sucktion fan 13 connects frequency converter 15, and the rotating speed of blower fan regulates by frequency converter 15, and the air quantity scope of sucktion fan 13 is 0-1200m
3/ min, thus dirt under different wind friction velocity can be determined-mist particle coupling settlement rule.
Further, the laser via of one inclination is offered in analogue means stable section 7 side, tunnel, laser via two ends are respectively bottom distance tunnel analogue means and the 0.3m of top, thus the droplet grain diameter that in same droplet field, diverse location goes out can be measured, laser mist droplet particle size analyzer 18 is installed outside tunnel analogue means stable section 7 for measuring the mist droplet particle size in the analogue means of tunnel, laser mist droplet particle size analyzer 18 supports with tripod, tripod is Height Adjustable, thus the mist droplet particle size at diverse location place can be measured, for the determination of atomizing de-dusting rule provides support.
For understanding the present invention better, now by reference to the accompanying drawings, experimental technique of the present invention is described in detail.
As shown in Figure 1, under wind flow field of the present invention, the experimental technique of the analogue experiment installation of atomizing de-dusting rule, is characterized in that, comprises the following steps:
The first step, starts sucktion fan 13, the data that observation airflow velocity analyzer 6 and barometer 5 collect, and is regulated the output power of sucktion fan 13, until form stable wind flow field in analogue experiment installation by frequency converter 15;
Second step, starts and sends out a dirt device 1, under the effect of air-flow, carry dust in analogue experiment installation, and record PM 2.5 dust sampler 10 and collect dust concentration data;
3rd step, adjustable spraying bar 8 orientation, opens make-up pump 20, forms stable water smoke in analogue experiment installation;
4th step, by laser mist droplet particle size analyzer 18 by the speed of the inner dirt-mist particle of tunnel analogue means that measures, granularity and concentration, and send data to described computing machine 19, draw particle speed in dust and droplet coupling process, relation between granularity and concentration by computing machine 19;
5th step, experimentally need, timely adjustment sucktion fan 13 output power, make-up pump 20 top hole pressure and spray lance 8 orientation, under measuring different situations respectively by laser mist droplet particle size analyzer 18 and PM 2.5 dust sampler 10, the mist droplet particle size at different measuring points place and droplet velocities and by the dust concentration before and after droplet field, and send data to described computing machine 19, particle speed in dust and droplet coupling process, relation between granularity and concentration is drawn, until experiment terminates by computing machine 19.
Claims (7)
1. the analogue experiment installation of atomizing de-dusting rule under a wind flow field, it is characterized in that, comprise and send out a dirt device, tunnel analogue means, ventilation unit, tunnel environment determinator, spraying plant, mist droplet particle size determinator, test waste treatment device and be arranged on the computing machine of device outside; Wherein:
Described dirt device is positioned at the air intake vent place of tunnel analogue means, for quantitatively producing dust in the analogue means of tunnel, for dirt-mist particle coupling settlement experiment provides dust, is the dirt source of this device;
Described tunnel analogue means is the seal chamber of a both ends open, comprises air inlet, wind inlet section, diffuser, stable section, contraction section and air outlet successively from left to right;
The central point of described air inlet, wind inlet section, diffuser, stable section, contraction section and air outlet is positioned on same axis;
The left side of described wind inlet section is air inlet, and the right side of described contraction section is air outlet;
Described diffuser flare shape, from left to right successively by carefully thicker;
Described contraction section is inverted tubaeform shape, successively from the coarse to fine from left to right;
Described stable section from left to right thickness is consistent;
Described dirt device is arranged on the side outside the air inlet of described tunnel analogue means;
Described air outlet is connected with sucktion fan, and described sucktion fan is driven by the buncher of a band frequency converter;
The front-rear side walls of described stable section offers respectively the first light hole and the second light hole, the distance between the center of described first light hole and the edge, the end of front side wall is 30cm, and the distance between the center of described second light hole and the edge, top of rear wall is 30cm;
Described first light hole and the second light hole place are provided with eyeglass respectively, and the seam crossing between described eyeglass and described sidewall seals; The generator of described laser mist droplet particle size analyzer and receiver are separately positioned on outside described first light hole and the second light hole;
Described laser mist droplet particle size analyzer is for measuring the speed of the inner dirt-mist particle of described tunnel analogue means, granularity and concentration, and the data detected are transferred to described computing machine, draw particle speed in dust and droplet coupling process, relation between granularity and concentration by described computing machine;
The bottom of described stable section is provided with the drainage pipeline for getting rid of experiment sewage;
Described stable section inner roof wall is longitudinally hung with a slide bar, and described slide bar is positioned at directly over described axis, and described tunnel environment determinator is suspended on described slide bar;
Described tunnel environment determinator comprises airflow velocity analyzer, barometer and PM 2.5 dust sampler for measuring dust concentration in the analogue means of tunnel;
Described airflow velocity analyzer, barometer and dust sampler quantity are some;
Described slide bar being hung with respectively three can along slide bar grid-shaped metal frame in axial sliding, on the grid-shaped metal frame that described airflow velocity analyzer is fixed therein in the mode be evenly arranged, described barometer and PM 2.5 dust sampler are fixed on two other grid-shaped metal frame in the mode be evenly arranged respectively;
Described spraying plant comprises the water tank, make-up pump and the spray lance that connect in turn, described spray lance is provided with the nozzle of some quantity;
It is inner that described spray lance is arranged on tunnel analogue means in the mode that can move up and down, and sprayed with mist by the water of nozzle by make-up pump feed, forms droplet field in described tunnel analogue means inside;
Described experiment waste treatment device comprises water smoke treating apparatus and waste water purification device;
Described water smoke treating apparatus comprises a mist eliminator, and described mist eliminator is connected with the air outlet of described sucktion fan, carries out demist process, and the air after demist will be discharged to outdoor by air duct for the gas-vapor mix of being extracted out by described sucktion fan;
Described waste water purification device is connected by the drain pipe port of drainage pipeline with analogue means diapire place, described tunnel, for grain diameter in the spraying condensate water of analogue means inside, described tunnel is greater than 1um the whole purified treatment of impurity after, be discharged to outside laboratory.
2. the analogue experiment installation of atomizing de-dusting rule under wind flow field according to claim 1, it is characterized in that, described tunnel analogue means length is 11m, wherein:
Wind inlet section length is 1m, is 1.5m with the cross section length of side in the vertical direction of described axis;
Diffuser length is 3m, and the spread angle of diffuser is 14 degree;
Stable section length is 6m, is 3m with the cross section length of side in the vertical direction of described axis;
Contraction section length is 1m, and angle of throat is 51 degree;
Described tunnel analogue means is framed structure, and its support frame material is steel, and the material of remainder is organic glass, and the thickness of described organic glass is 2 ~ 3cm.
3. the analogue experiment installation of atomizing de-dusting rule under wind flow field according to claim 1, it is characterized in that, the measurable maximum spray field diameter of described laser mist droplet particle size analyzer is 4m, measurable size droplet diameter is of a size of 0.5-2000 μm, grain diameter measurement accuracy is 0.5 μm, velocity survey scope is 100-300m/s, and accuracy is 1m/s;
The rated operating pressure of described make-up pump is 28Mpa;
Described airflow velocity analyzer is impeller airflow velocity analyzer, and its model is AVM-01, and the wind speed range that can measure is 0 ~ 10m/s;
Described dirt device is SAG420 aerosol generator, and its dust granules particle size range produced is 0 ~ 200 μm; Be 1g/cm by soot density
3meter, the dust flow range that SAG420 aerosol generator produces is 0 ~ 12kg/h;
Described sucktion fan is axial flow blower, and its rated power is 15kw, rated flow is 20m
3/ s;
Described frequency converter is G/P type high performance universal vector frequency converter, and its rated voltage is 380V, and rated power is 75KW.
4. the analogue experiment installation of atomizing de-dusting rule under wind flow field according to claim 1, is characterized in that, described wind inlet section, diffuser, stable section and contraction section are along being square with the cross section in the vertical direction of described axis;
The below of described wind inlet section is provided with wind inlet section support, and the below of described stable section is provided with stable section support, and described wind inlet section support and stable section support are provided with the adjusting bolt for highly regulating;
The front side wall of described stable section is also provided with a manhole.
5. the analogue experiment installation of atomizing de-dusting rule under wind flow field according to claim 1, it is characterized in that, the quantity of described airflow velocity analyzer, barometer and dust sampler is 9.
6. the analogue experiment installation of atomizing de-dusting rule under wind flow field according to claim 1, it is characterized in that, also include tripod base, described dirt device is placed on described tripod base.
7. the experimental technique of the analogue experiment installation of atomizing de-dusting rule under wind flow field as claimed in claim 1, is characterized in that, comprise the following steps:
The first step, starts sucktion fan, and the data that observation airflow velocity analyzer and barometer collect regulate the output power of sucktion fan, until form stable wind flow field in analogue experiment installation by frequency converter;
Second step, starts and sends out a dirt device, under the effect of air-flow, carry dust in analogue experiment installation, and record PM 2.5 dust sampler and collect dust concentration data;
3rd step, adjustable spraying bar orientation, opens make-up pump, forms stable water smoke in analogue experiment installation;
4th step, by laser mist droplet particle size analyzer by the speed of the inner dirt-mist particle of tunnel analogue means that measures, granularity and concentration, and send data to described computing machine, draw particle speed in dust and droplet coupling process, relation between granularity and concentration by computing machine;
5th step, experimentally need, timely adjustment sucktion fan output power, make-up pump top hole pressure and spray lance orientation, under measuring different situations respectively by laser mist droplet particle size analyzer and PM 2.5 dust sampler, the mist droplet particle size at different measuring points place and droplet velocities and by the dust concentration before and after droplet field, and send data to described computing machine, particle speed in dust and droplet coupling process, relation between granularity and concentration is drawn, until experiment terminates by computing machine.
Priority Applications (1)
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