CN203383846U - Device for preparing aerosol for prevention and control of coal spontaneous combustion - Google Patents
Device for preparing aerosol for prevention and control of coal spontaneous combustion Download PDFInfo
- Publication number
- CN203383846U CN203383846U CN201320338339.3U CN201320338339U CN203383846U CN 203383846 U CN203383846 U CN 203383846U CN 201320338339 U CN201320338339 U CN 201320338339U CN 203383846 U CN203383846 U CN 203383846U
- Authority
- CN
- China
- Prior art keywords
- aerosol
- jet
- pneumatic
- spontaneous combustion
- proportioning device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model relates to a device for preparing aerosol for prevention and control of coal spontaneous combustion. The problem of the prevention and control of spontaneous combustion of coal left in a coal mine goaf, especially in a high-position space is solved. The device comprises a jet flow proportioning device, an aerosol atomizing device and a pneumatic delivery device, wherein the jet flow proportioning device comprises a jet flow proportioner, a pressure water inlet connected with a jet flow proportioner spray nozzle and a retarder inlet connected with a jet flow proportioner liquid sucking chamber, and a jet flow proportioner outlet is connected with an aerosol atomizing device liquid inlet. The aerosol atomizing device comprises an atomizing chamber, wherein an atomized aerosol outlet of the atomizing chamber is connected with a pneumatic delivery device sucking port. The pneumatic delivery device comprises a pneumatic delivering apparatus, the pneumatic delivery device sucking port communicated with the pneumatic delivering apparatus, a pressure gas inlet communicated with the pneumatic delivering apparatus and a pneumatic delivery device outlet. A retarder is diluted with water and then atomized, and finally atomized and retarded aerosol is delivered to the goaf through pressure gas.
Description
Technical field
The utility model relates to coal spontaneous combustion fireproofing technique field, goaf.
Background technology
The whole nation has in colliery 56% mine to have the danger of spontaneous fire, cause every year directly and nearly 10,000,000,000 yuan of indirect economic loss.Existing preventing and extinguishing fire technology is all to realize anti-fire extinguishing by reducing or reduce mixture of coal with oxygen, larger for the resistance inerting difficulty in the comparatively unobstructed goaf of leaking out.Especially combining the employing pit mining intensity of adopting with Longwall top coal caving technology strengthens, the ventilation system relative complex, the goaf scope constantly enlarges, and goaf is to be the most also the zone that freely burning fire the most often occurs, and has increased greatly the frequency of mine coal spontaneous combustion and the difficulty of control.The goaf drop has a large amount of float coal; There is the oxygen supply of continuously leaking out; Possess good something lost coal accumulation of heat environment, and the goaf area is large, spontaneous combustion " three bands " is dynamic mobile, loses that the coal high temperature range is large, high temperature dot is hidden with the propelling of work plane, once it is large-area often that spontaneous combustion occurs, the fire extinguishing difficulty is very large.
The Main Means of control coal spontaneous combustion at present is cooling (as water filling, slip casting, glue injection body, notes three-phase froth etc.) and goaf inerting (as annotated nitrogen, carbon dioxide injection etc.), although positive role has been brought into play in the anti-fire extinguishing of these means in the low bit space of colliery Close Quarters Goaf, for the high bit space in remote goaf, catch fire and can't prove effective fully.Because coal spontaneous combustion mostly occurs in goaf, the area in goaf is larger, burning things which may cause a fire disaster point is more hidden and be difficult to determine its particular location, conventional fireproofing extinguishing materials is difficult to carry out the large tracts of land filling, and do not possess good accumulation, undesirable to regional coal spontaneous combustion fire effects such as preventing and controlling face goafs.So can make goaf fall oxygen, inerting in the urgent need to research, the resistance formed material is taken to remote hidden zone resistanceization spontaneous combustion of remaining coal, and arrive fire proofing material, equipment and the technique for applying of the high bit space in goaf.
The utility model content
The utility model provides a kind of aerosol preparation facilities of preventing and treating coal spontaneous combustion, and it can prevent and treat the spontaneous combustion of the zone something lost coals such as coal mine gob, and the resistance formed material is taken to remote hidden zone, particularly takes goaf high bit space resistanceization spontaneous combustion of remaining coal to.
The thinking that the utility model addresses the above problem is: by retardant dilution, and be atomized into aerosol and send into coal spontaneous combustion deathtrap, goaf.
For solving above technical problem, the utility model provides following technical scheme:
The aerosol preparation facilities of control coal spontaneous combustion provided by the utility model, its special character is: comprise successively connected jet-flow proportioning device, aerosol atomization plant and pneumatic conveyor,
Wherein, the jet-flow proportioning device comprises jet-flow proportioning device, the press water import be connected with jet-flow proportioning device nozzle, the retardant import be connected with jet-flow proportioning device imbibition chamber, and jet-flow proportioning device delivery outlet is connected with the aerosol atomization plant inlet;
Aerosol atomization plant comprises spray chamber and the supply terminals be placed in explosion-resistant enclosure, is provided with pulverizer plate in spray chamber, and the vaporific aerosol delivery outlet of spray chamber is connected with the pneumatic conveyor intake;
Pneumatic conveyor comprises pneumatic conveyer, the pneumatic conveyor intake be communicated with pneumatic conveyer, the pressed gas import be communicated with pneumatic conveyer and pneumatic conveyor delivery outlet, described pressed gas is nitrogen or carbon dioxide, consider the safety to the staff, preferred nitrogen.
Preferred version of the present utility model is that above-mentioned jet-flow proportioning device comprises nozzle, is positioned at imbibition chamber, the trunnion be connected with the imbibition chamber and the anemostat be connected with trunnion of nozzle periphery.
Above-mentioned pulverizer plate preferably adopts integrated form ultrasonic atomization plate.
For real-time monitored jet-flow proportioning install pipes pressure and the flow of upper liquid, also in order to guarantee atomization quality, prevent that impurity from entering into aerosol atomization plant, on the press water inlet pipeline of jet-flow proportioning device and retardant inlet pipeline, be respectively equipped with pressure meter, flow meter and filter screen.
Compared with prior art, the utlity model has following advantage:
The utility model is usingd press water and pressure nitrogen gas or pressure carbon dioxide as transmitting power, so safe and reliable.Because the resistance aerosol prepared is vaporific, by the power of pressed gas can be rapidly to the something lost coal resistance of whole large tracts of land goaf and high bit space, extend spontaneous combustion period, play the effect of parcel, resistanceization, inerting, effectively suppress and prevent the development of coal spontaneous combustion.
The utility model can utilize the down-hole nitrogen-filling system, by pneumatic conveyer, the resistance aerosol delivery is arrived to the hidden zone of goaf coal spontaneous combustion, the nitrogen that enters flame range has the effect of falling the oxygen inerting, the aerocolloidal particulate of resistanceization covers the coal body surface, by absorbing heat, suffocate and the synergy inhibition coal of physical chemistry resistanceization and the combination of oxygen, and consume the free active group that coal oxygen recombination reaction produces, extended the spontaneous combustion period of coal.The resistanceization aerosol particles has good suspending power and around the barrier ability, be diffused in a short period of time each position of spontaneous combustion deathtrap, deep, goaf, when realizing inerting, can also be permeated short space, enter the hidden zone of deep, goaf coal spontaneous combustion, realize comprehensive fire prevention, improved fire prevention efficiency.
The aerosol preparation facilities volume that the utility model provides is little, simple in structure, easy to operate, security of operation, reliable and stable, use power can adopt normal water supply, the nitrogen-filling system used in down-hole, use safety and reliability at highly gassy mine, and to environment and personnel without any negative effect.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is structure diagram of the present utility model;
The structural representation that Fig. 3 is pneumatic conveyer of the present utility model.
Reference numeral:
1-jet-flow proportioning device; The import of 2-press water; The import of 3-retardant; 4-aerosol atomization plant inlet; The 5-spray chamber; 6-jet-flow proportioning device delivery outlet; The vaporific aerosol of 7-is put delivery outlet; 8-pneumatic conveyor intake; The 9-pneumatic conveyer; The import of 10-pressed gas; 11-pneumatic conveyor delivery outlet; The 12-nozzle; 13-imbibition chamber; The 14-trunnion; The 15-anemostat; The 16-central lumen; The 17-annular chamber; The 18-nozzle ring; The 19-tapping valve; The 20-quick connector; The mining stop valve of 21-; The 22-filter screen; The 23-flow meter.
The specific embodiment
Below in conjunction with accompanying drawing, content of the present utility model is described in detail.
As depicted in figs. 1 and 2, aerosol preparation facilities of the present utility model comprises jet-flow proportioning device, aerosol atomization plant and pneumatic conveyor.The jet-flow proportioning device comprises jet-flow proportioning device 1, the press water import 2 be connected with jet-flow proportioning device nozzle 12, the retardant import 3 be connected with jet-flow proportioning device imbibition chamber 13, and jet-flow proportioning device delivery outlet 6 is connected with aerosol atomization plant inlet 4; Aerosol atomization plant comprises spray chamber 5 and the supply terminals be placed in explosion-resistant enclosure, is provided with integrated form ultrasonic atomization plate in spray chamber, and the vaporific aerosol delivery outlet 7 of spray chamber is connected with pneumatic conveyor intake 8; Pneumatic conveyor comprises pneumatic conveyer 9, the pneumatic conveyor intake be communicated with pneumatic conveyer, the pressed gas import 10 be communicated with pneumatic conveyer and pneumatic conveyor delivery outlet 11, pressed gas can be selected nitrogen or carbon dioxide, consider the safety to the staff, preferred nitrogen, retardant can be CaCl
2solution, MgCl
2solution, ZnCl
2solution or Ca (OH)
2a kind of in solution, but be not limited in, these are several, the pressure of nitrogen or carbon dioxide gas is preferably 0.5～0.7MPa.
As shown in Figure 2, the jet-flow proportioning device comprises nozzle 12, is positioned at the imbibition chamber 13 of nozzle periphery, the trunnion 14 be connected with the imbibition chamber and the anemostat 15 be connected with trunnion, and length of throat is 2 times of trunnion internal diameter; When the pressure of press water is 1～2Mpa, the volume flow ratio of retardant and press water is 1: 3～1: 4.
Due to the utility model in when work, aerosol atomization plant can produce liquid in atomization process, affect atomization work, therefore, also be provided with tapping valve 19, float liquid level switch, explosion-proof solenoid valve on aerosol atomization plant, when the aerosol atomization plant liquid level transfinites, float liquid level switch output switch amount, close explosion-proof solenoid valve, realize automatic blocking.
As shown in Figure 3, pneumatic conveyer has a central lumen 16 and is positioned at the annular chamber 17 of central lumen periphery, be provided with nozzle ring 18 between the entrance point of annular chamber and central lumen, the pressed gas import is connected with annular chamber, and the pneumatic conveyor intake is connected with the entrance point of central lumen.
For pressure and the flow of liquid on the real-time monitored pipeline, prevent that impurity from entering, be provided with mining stop valve, filter screen, flow meter on the press water inlet pipeline He on the retardant inlet pipeline, pipeline enclosure adopts mining quick connector; Be provided with mining stop valve, filter screen on the pipeline of aerosol atomization plant inlet; Be provided with flow meter, mining stop valve on the pressed gas inlet pipeline; The flow of press water and retardant and ratio can utilize mining stop valve to regulate and control.The termination of each pipeline of the utility model has adopted mining quick connector, and the staff can be according to the concrete condition of the colliery degree of depth, increases flexibly, dismantles or device of the present utility model is installed.
Embodiment illustrates, and pressed gas be take nitrogen as example:
At certain mine, entered the nozzle of jet-flow proportioning device by the press water import with the 1.5Mpa press water, at nozzle exit due to the stiction between press water jet and air, near air nozzle is taken away, make to form negative pressure (the flow velocity increase of main flow near nozzle, potential energy reduces, kinetic energy increases), under the environment atmospheric pressure effect, being pumped retardant liquid is drunk up (volume flow ratio of retardant liquid and press water is 1: 4) through the imbibition chamber, and together enter in trunnion in company with press water, two bursts of liquid generation momentum-exchanges in trunnion, press water passes to part energy the retardant liquid of being pumped, the press water flow velocity slows down, the retardant liquid velocity of being pumped is accelerated, while arriving the trunnion end, the speed of two strands of liquid is gradually consistent, mixed process completes substantially, form the retardant mixed liquor and enter anemostat, reduce gradually (kinetic energy reduces gradually) at the diffusion velocity in pipes, potential energy (pressure) increases gradually, pressure to anemostat exit retardant mixed liquor flows into the pressure of trunnion higher than the retardant liquid of being pumped, flow into the pressure of trunnion lower than press water, last retardant mixed liquor is discharged from the anemostat of DN20mm, flow into aerosol atomization plant.
In aerosol atomization plant, aerosolizable 200kg retardant mixed liquor per hour, be arranged on the integrated form ultrasonic atomization plate in spray chamber, utilize the intrinsic supersonic oscillations characteristics of ultrasonic atomization oscillator piezoelectric ceramics, the circuit supersonic oscillations, be transferred to the piezoelectric ceramic vibrator sub-surface, piezoelectric ceramic vibrator produces axial mechanical resonance variation and is transferred to the resistance mixing material be in contact with it, make liquid surface produce protuberance, and around protuberance cavitation occurs, the shock wave produced by cavitation will be with the vibration frequency of oscillator constantly repeatedly, make liquid surface produce the capillary wave of finite amplitude, the wave head of this tensile wave disperses, making the liquid atomization into resistance aerosol particles diameter is the vaporific resistance aerosol of 1～10 μ m.
As shown in Figures 2 and 3, the vaporific aerosol delivery outlet of spray chamber connects the intake of pneumatic conveyor by the mining quick connector of Φ 32mm, nitrogen-filling system enters annular chamber with the pressure of 0.69MPa by the pressed gas import, by a little ring nozzle, with high flow velocity, spray, the air-flow sprayed at a high speed in the pneumatic conveyer of aerosol atomization plant will form the Coanda effect region of no pressure (as shown in Figure 3, arrow in Fig. 3 has meaned pressed gas and the aerocolloidal trend of vaporific resistanceization), the vaporific resistance aerosol driven in aerosol atomization plant enters the central lumen of pneumatic conveyer by intake, with pressure nitrogen gas, mix, and by the power of pressure nitrogen gas, vaporific resistance aerosol is delivered to goaf (carrying 5～30 times of magnification ratios) from the delivery outlet of aerosol atomization plant, utilize good flow behavior and the transport characteristics of resistanceization aerosol, vaporific resistance aerosol is taken to remote hidden spontaneous combustion deathtrap, and can arrive the high bit space in goaf, especially ideal to prevention goaf " twice two lines " top coal and rib spontaneous combustion effect, form one deck resistanceization film on the coal body surface, the composition of resistanceization film has very strong water imbibition, can make coal for a long time in dampness, reduce the functional group of oxidation of coal reaction or stop radical reaction, oxidation rate is suppressed, extend coal spontaneous combustion stage, nitrogen is as the power of Compressed Gas, in inerting spontaneous combustion zone, also play the effect that inhibition gas and water-gas fire.
Claims (5)
1. prevent and treat the aerosol preparation facilities of coal spontaneous combustion, it is characterized in that: comprise successively connected jet-flow proportioning device, aerosol atomization plant and pneumatic conveyor,
Wherein, the jet-flow proportioning device comprises jet-flow proportioning device, the press water import be connected with jet-flow proportioning device nozzle, the retardant import be connected with jet-flow proportioning device imbibition chamber, and jet-flow proportioning device delivery outlet is connected with the aerosol atomization plant inlet;
Aerosol atomization plant comprises spray chamber and the supply terminals be placed in explosion-resistant enclosure, is provided with pulverizer plate in spray chamber, and the vaporific aerosol delivery outlet of spray chamber is connected with the pneumatic conveyor intake;
Pneumatic conveyor comprises pneumatic conveyer, the pneumatic conveyor intake be communicated with pneumatic conveyer, the pressed gas import be communicated with pneumatic conveyer and pneumatic conveyor delivery outlet, and described pressed gas is nitrogen or carbon dioxide.
2. the aerosol preparation facilities of control coal spontaneous combustion according to claim 1 is characterized in that: described jet-flow proportioning device comprises nozzle, is positioned at the imbibition chamber of nozzle periphery, the trunnion be connected with the imbibition chamber and the anemostat be connected with trunnion.
3. the aerosol preparation facilities of control coal spontaneous combustion according to claim 1 and 2, it is characterized in that: described pulverizer plate is integrated form ultrasonic atomization plate.
4. the aerosol preparation facilities of control coal spontaneous combustion according to claim 1 and 2 is characterized in that: on the press water inlet pipeline of jet-flow proportioning device and retardant inlet pipeline, be respectively equipped with pressure meter, flow meter and filter screen.
5. the aerosol preparation facilities of control coal spontaneous combustion according to claim 1 and 2, it is characterized in that: described pneumatic conveyer has a central lumen and is positioned at the annular chamber of central lumen periphery, be provided with nozzle ring between the entrance point of annular chamber and central lumen, the pressed gas import is connected with annular chamber, and the pneumatic conveyor intake is connected with the entrance point of central lumen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320338339.3U CN203383846U (en) | 2013-06-13 | 2013-06-13 | Device for preparing aerosol for prevention and control of coal spontaneous combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320338339.3U CN203383846U (en) | 2013-06-13 | 2013-06-13 | Device for preparing aerosol for prevention and control of coal spontaneous combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203383846U true CN203383846U (en) | 2014-01-08 |
Family
ID=49872355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320338339.3U Withdrawn - After Issue CN203383846U (en) | 2013-06-13 | 2013-06-13 | Device for preparing aerosol for prevention and control of coal spontaneous combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203383846U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306706A (en) * | 2013-06-13 | 2013-09-18 | 西安科技大学 | Device and process for preparing aerosol for preventing coal from spontaneous combustion |
| CN105240042A (en) * | 2015-09-23 | 2016-01-13 | 太原理工大学 | Method of using phase-changeable sols for preventing spontaneous combustion type fire disasters in coalmine goafs |
| CN108412535A (en) * | 2018-03-19 | 2018-08-17 | 西安科技大学 | A kind of retardant solution preparation device |
-
2013
- 2013-06-13 CN CN201320338339.3U patent/CN203383846U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306706A (en) * | 2013-06-13 | 2013-09-18 | 西安科技大学 | Device and process for preparing aerosol for preventing coal from spontaneous combustion |
| CN103306706B (en) * | 2013-06-13 | 2015-04-29 | 西安科技大学 | Device and process for preparing aerosol for preventing coal from spontaneous combustion |
| CN105240042A (en) * | 2015-09-23 | 2016-01-13 | 太原理工大学 | Method of using phase-changeable sols for preventing spontaneous combustion type fire disasters in coalmine goafs |
| CN108412535A (en) * | 2018-03-19 | 2018-08-17 | 西安科技大学 | A kind of retardant solution preparation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103306706B (en) | Device and process for preparing aerosol for preventing coal from spontaneous combustion | |
| CN103007472B (en) | Compressed air foam extinguishing agent ejecting gun and method thereof | |
| CN203383846U (en) | Device for preparing aerosol for prevention and control of coal spontaneous combustion | |
| CN102937033B (en) | Efficient nitrogen injection and fire extinguishing system for mining | |
| CN105749449B (en) | A kind of tunnel fire system and extinguishing method | |
| CN201055623Y (en) | Automatic fire-extinguishing system of ultra-fine dry powder for oil tank | |
| CN203154684U (en) | Compressed gas foam extinguishing system for fire fighting truck | |
| CN204082202U (en) | foam dust-removing device | |
| CN102406999B (en) | Pipe network type divisional dry powder fire extinguishing system and method | |
| CN105971658B (en) | A kind of effervescent atomization goaf biphase gas and liquid flow fire extinguishing system | |
| CN202315058U (en) | Pipe network type powder extinguishing system | |
| CN103691082B (en) | The lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion and technique thereof | |
| CN101612458A (en) | Energy storage positive pressure froth fire extinguishing system | |
| CN102247673B (en) | Gas-liquid proportioning mixed foam maker of compressed gas foam fire-fighting system | |
| CN203694462U (en) | Colloid inhibition inerting foam preparation device for preventing spontaneous combustion of coal | |
| CN102327687A (en) | Dry powder extinguishing system and method based on wind-speed adjustment | |
| CN109058180B (en) | Gas jet limit imbibition method | |
| CN209967489U (en) | Double-channel low-pressure fluid atomization spray head | |
| CN204532408U (en) | The distinguished and admirable atomizing dust removing device of a kind of channel of coal mining working surface | |
| CN218010740U (en) | Shock wave driving pulse fire extinguisher | |
| CN209154944U (en) | A kind of Novel fixed-type compressed air foam automatic fire extinguishing system | |
| CN203736762U (en) | Multi-agent combined type fire monitor | |
| CN103388483A (en) | Coal mine underground movable multi-component foam fire extinguishing system | |
| CN201441767U (en) | Energy storing positive pressure foam fire extinguishing system | |
| CN202851050U (en) | A movable multi-component foam extinguishing system used in underground coal mines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140108 Effective date of abandoning: 20150429 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140108 Effective date of abandoning: 20150429 |