CN203694462U - Colloid inhibition inerting foam preparation device for preventing spontaneous combustion of coal - Google Patents
Colloid inhibition inerting foam preparation device for preventing spontaneous combustion of coal Download PDFInfo
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- CN203694462U CN203694462U CN201320844415.8U CN201320844415U CN203694462U CN 203694462 U CN203694462 U CN 203694462U CN 201320844415 U CN201320844415 U CN 201320844415U CN 203694462 U CN203694462 U CN 203694462U
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- colloid
- resistanceization
- jet
- foam
- spontaneous combustion
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Abstract
The utility model provides a colloid inhibition inerting foam preparation device for preventing spontaneous combustion of the coal. The colloid inhibition inerting foam preparation device comprises a jet flow proportional mixer device, a primary foaming device, a secondary foaming device and a gas conveyer, all of which are sequentially connected; the jet flow proportional mixer device comprises a jet flow proportional mixer (a jet flow proportional mixer is designed and customized by imitating a jet device for fire protection, and obtaining the size of each part of the jet flow proportion mixer through the certain computation according to the practical requirements), a high-pressure water inlet and a colloid inhibition liquid inlet, the high-pressure water inlet is connected with a jet flow proportion mixer nozzle, the colloid inhibition liquid inlet is connected with a jet flow proportion mixer liquid absorption chamber, and the output port of the jet flow proportional mixer is connected with a liquid inlet of the primary foaming device. According to the colloid inhibition inerting foam preparation device for preventing the spontaneous combustion of the coal and a process of the colloid inhibition inerting foam preparation device, pressure water and pressure nitrogen are taken as conveyance power which is safe and reliable.
Description
Technical field
The utility model relates to coal spontaneous combustion preventing and extinguishing fire technology field, goaf, relates in particular to a kind of lazy bubble preparation facilities of colloid resistanceization of preventing and treating coal spontaneous combustion.
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 resistance, inerting, the leak stopping difficulty in the comparatively unobstructed goaf of leaking out.Especially combine the employing of adopting with Longwall top coal caving technology, pit mining intensity strengthens, ventilating system relative complex, and goaf scope constantly expands, and goaf is to be the most also the region that freely burning fire the most often occurs, the frequency of mine spontaneous combustion of coal and the difficulty of control are increased greatly.Goaf drop has a large amount of something lost coals; There is the oxygen supply of continuously leaking out; Possess good something lost coal accumulation of heat environment, and goaf area is large, spontaneous combustion " three bands " is dynamic mobile, loses that coal high temperature range is large, high temperature dot is hidden with the propelling of coal-face, once it is large-area often that spontaneous combustion occurs, fire extinguishing difficulty is very large.
The Main Means of control coal spontaneous combustion is at present cooling (as water filling, slip casting, glue injection body, note three-phase froth etc.) and goaf inerting (as note 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 in Close Quarters Goaf, colliery, catches fire and can't prove effective completely for the high bit space in remote goaf.Because coal spontaneous combustion mostly occurs in goaf, the area in goaf is larger, burning things which may cause a fire disaster point more hidden and be difficult to determine its particular location, conventional fireproofing extinguishing materials is difficult to carry out large area filling, and do not possess good accumulation, undesirable to region coal spontaneous combustion fire effects such as preventing and controlling face goafs.So can make goaf fall oxygen, inerting, leak stopping in the urgent need to research, resistance formed material can be taken to remote hidden region resistanceization spontaneous combustion of remaining coal, and easily pile up and arrive fire proofing material, equipment and the technique for applying of the high bit space in goaf.
Utility model content
In order to solve existing technical problem in background technology, the utility model proposes a kind of lazy bubble preparation facilities of colloid resistanceization of preventing and treating coal spontaneous combustion, using press water and pressure nitrogen gas as transmitting power, safe and reliable.
Technical solution of the present utility model is: the lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion, is characterized in that: comprise successively connected jet-flow proportioning mixer apparatus, one-level foam device, secondary foam device and air transporting arrangement;
Jet-flow proportioning mixer apparatus comprises that (jet-flow proportioning device is copied the ejector of using in fire-fighting to jet-flow proportioning blender, according to actual needs, by certain calculating, obtain the size of jet-flow proportioning blender each several part, then design customized), the water under high pressure import being connected with jet-flow proportioning mixer nozzle, the colloid resistanceization liquid import being connected with jet-flow proportioning blender imbibition chamber, jet-flow proportioning blender delivery outlet is connected with one-level foam device inlet;
One-level foam device comprises the foaming chamber spiral nozzle that import is connected with colloid resistanceization liquid, in foaming chamber, be provided with foam screen, one-level foam device air inlet is connected with air transporting arrangement delivery outlet, and the outlet of one-level foam device foam solution is connected with the import of secondary foam device foam solution;
Air transporting arrangement is for providing the conveying device of gases at high pressure, and described gases at high pressure are nitrogen or carbon dioxide.
Above-mentioned jet-flow proportioning blender comprises nozzle, is positioned at the imbibition chamber of nozzle periphery, the trunnion being connected with imbibition chamber and the anemostat being connected with trunnion; Described anemostat is connected with jet-flow proportioning blender delivery outlet.
Above-mentioned foam screen is stainless steel compacting net, and described nozzle is spiral solid conical nozzle.
On the press water inlet pipeline of jet-flow proportioning blender and resistanceization liquid inlet pipeline, be respectively equipped with explosion-proof vortex-shedding meter, filter screen and mining stop valve.
One-level foam device is that flange is connected with the connection of secondary foam device, uses two-stage foaming simultaneously or uses separately one-level foaming according to the different choice of fed distance.
In one-level foam device, have foam screen, secondary foam device bottom is provided with tapping valve, and import is connected with air transporting arrangement delivery outlet.
The utlity model has following advantage:
1) the utility model is using press water and pressure nitrogen gas as transmitting power, so safe and reliable.Because the lazy bubble of colloid resistanceization of preparation is foam-like, by the power of pressure nitrogen gas can be rapidly to the something lost coal of overall large area goaf and high bit space cover, resistance, leak stopping, prolongation spontaneous combustion period, play the effect of parcel, resistanceization, inerting and absorbing and cooling temperature, effectively suppress and prevent the development of coal spontaneous combustion.
2) the utility model can utilize down-hole nitrogen-filling system, by air transporting arrangement, lazy colloid resistanceization bubble is transported to the hidden region of goaf coal spontaneous combustion, and the nitrogen that enters flame range has the effect of falling oxygen inerting.Colloid inhibition foam has at short notice that fill volume is large, mobility and the feature such as accumulation is good, colloid retardant can be delivered to different-thickness, difform loose coal space or falling space, the obstruction passage that leaks out, isolated air, play smothering action, colloid retardant is attached to loose coal surface, form one deck with water and can suppress the film that oxygen contacts with coal, stop the activity chain type cyclic group reaction on oxygen and texture of coal, the affinity of coal and oxygen is reduced, and absorb coal surface oxidation free radical, stop coal body oxidation heat liberation; Bring a large amount of moisture into by foam, when evaporation, absorb a large amount of heats, play cooling effect, reduced the heating rate of loose coal.So the lazy bubble of colloid resistanceization has the anti-fire extinguishing function of multi-effect cooperative, anti-fire extinguishing effect is remarkable.
3) it is good that the utility model employing secondary foam device, and former device relatively has foaming effect, and fed distance is far away, to the utilization rate advantages of higher of colloid resistanceization mixed liquor, has well solved the problem of one-level foam device transmitting power deficiency.
4) the utility model adopts jet-flow proportioning blender to mix colloid resistanceization liquid and water, utilizes down-hole pressure water as power, does not need water pump, and then does not also need to use electricity, has ensured the safety of down-hole.
5) lazy brewed, the security of operation, reliable and stable little, simple in structure, easy to operate for device volume of colloid resistanceization that the utility model provides, use power can adopt normal water supply, the nitrogen-filling system using in down-hole, use safety and reliability at highly gassy mine, and to environment and personnel without any negative effect.
Brief description of the drawings
Fig. 1 is structure diagram of the present utility model;
1-jet-flow proportioning blender; The import of 2-press water; 3-is mining stop valve; 4-filter screen; The explosion-proof vortex-shedding meter of 5-; 6-foam device air inlet; 7-jet-flow proportioning mixer nozzle; 8-imbibition chamber; 9-trunnion; 10-anemostat; 11-jet-flow proportioning mixer outlet; The import of 12-colloid resistanceization liquid; 13-one-level foam device shell; 14-spiral nozzle; 15-foam screen; 16-foam outlet; The outlet of 17-hydrops; 18-snap joint; 19-flange-interface; 20-secondary foam device shell;
Detailed description of the invention
Referring to Fig. 1, the lazy bubble preparation facilities of colloid resistanceization of the present utility model comprises jet-flow proportioning mixer apparatus, one-level foam device, secondary foam device and air transporting arrangement.Jet-flow proportioning mixer apparatus comprises jet-flow proportioning blender 1, the press water import 2 being connected with jet-flow proportioning device nozzle 7, the colloid resistanceization liquid import 12 being connected with jet-flow proportioning device imbibition chamber 8, and jet-flow proportioning device delivery outlet 11 is connected with one-level foam device inlet; One-level foam device comprises the foaming chamber being placed in shell, the spiral nozzle 14 being connected with inlet, in foaming chamber, be provided with foam screen 15, the lazy bubble delivery outlet of colloid resistanceization of foaming chamber is connected with the lazy bubble import of secondary foam device colloid resistanceization, and foam device air inlet 6 is connected with air transporting arrangement outlet; Air transporting arrangement is for providing the conveying device of gases at high pressure, and described pressed gas is nitrogen or carbon dioxide, considers the safety to staff, preferred nitrogen.Secondary foam device air inlet 6 is connected with air transporting arrangement outlet, the lazy mouth that bubbles out of secondary foam device colloid resistanceization is connected with foam outlet 16, consider broken bubble effect and the foaming effect of retardant to foam, select polymer colloid retardant, in resistanceization liquid, add a certain amount of foam stabilizer, surfactant etc.The pressure of nitrogen is preferably 0.6～1.0MPa.
Jet-flow proportioning blender comprises nozzle 7, is positioned at the imbibition chamber 8 of nozzle periphery, the trunnion 9 being connected with imbibition chamber and the anemostat 10 being connected with trunnion, through a series of calculating, according to selected pressure difference, and the proportioner of selecting is also different, length of throat is generally 7 times of trunnion radiuses, diffusion tube lengths is 8 times of trunnion radius, nozzle is trunnion radius to the distance of trunnion, in the time that the pressure of press water is 0.6～1.2Mpa, the volume flow ratio of resistanceization mixed liquor and press water is 3:97 or 6:94.
Because the utility model is in the time working, the lazy bulb apparatus of colloid resistanceization can produce liquid in foaming process, affect foaming work, therefore, the lazy bulb apparatus of colloid resistanceization is provided with leakage fluid dram 17 on secondary foam device, and tapping valve is housed, in the time that colloid resistanceization mixed liquor reach a certain height and affects foaming effect in secondary foam device, open tapping valve, residual liquid is discharged.
For pressure and the flow of liquid on real-time monitored pipeline, prevent that impurity from entering, on press water import 2 pipelines He on colloid resistanceization liquid import 12 pipelines, be provided with mining stop valve 3, filter screen 4, explosion-proof vortex-shedding meter 5, pipeline enclosure adopts mining quick connector; On the pipeline of air transporting arrangement air inlet, be provided with explosion-proof vortex-shedding meter 5, mining stop valve 3; The flow of press water and colloid resistanceization liquid and ratio can be utilized mining stop valve 3 to regulate and control.Foam screen 15 in one-level foam device is by flange-interface 19, be stuck in foaming chamber, can dismantle, be convenient for changing, one-level foam device is divided into two parts, connect by flange, be convenient to installation and the replacing of solid spiral nozzle 14, can also regulate the distance of solid spiral nozzle 14 to foam screen 15.The termination of each pipeline of the utility model has adopted mining snap joint, and 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.
Water under high pressure and colloid resistanceization liquid, by the mixing of jet-flow proportioning blender, enter one-level foam device, through one step foaming, enter secondary foam device by air transporting arrangement, carry out second time of foaming, again by air transporting arrangement, inject target area through foam outlet.
Example illustrates, and pressed gas is taking nitrogen as example:
Process chart as shown in Figure 1, at certain mine, lazy colloid resistanceization bubble preparation facilities is put near goaf, adopt down-hole special pressure water transfer pipeline, 1.0Mpa press water is entered the nozzle of jet-flow proportioning blender by press water import, 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 environment atmospheric pressure effect, the colloid resistanceization liquid of being pumped is drunk up (volume flow ratio of colloid resistanceization liquid and press water is 3:97 or 6:94) through 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 colloid resistanceization liquid of being pumped, press water flow velocity slows down, the colloid resistanceization liquid velocity of being pumped is accelerated, while arriving trunnion end, the speed of two strands of liquid is gradually consistent, mixed process completes substantially, form colloid resistanceization mixed liquor and enter anemostat, reduce gradually (kinetic energy reduces gradually) at diffusion velocity in pipes, potential energy (pressure) increases gradually, flow into the pressure of trunnion higher than the colloid resistanceization liquid of being pumped to the pressure of anemostat exit colloid resistanceization mixed liquor, flow into the pressure of trunnion lower than press water, last colloid resistanceization mixed liquor is discharged from the anemostat of DN20mm, by spiral solid nozzle, enter one-level foam device.
In the lazy bulb apparatus of colloid resistanceization, through spiral solid nozzle, colloid resistanceization mixed liquor is sprayed onto on foam screen, and by air transporting arrangement, nitrogen enters one-level foam device, and by foam screen, colloid resistanceization mixed liquor carries out one step foaming, and the flow of power water is 3m
3/ h, nitrogen flow is 300-600m
3/ h, calculates according to the ratio of 3:97 or 6:94, and the colloid resistanceization liquid of consumption per hour is 0.093m
3/ h or 0.191m
3/ h, the flow that enters the colloid resistanceization mixed liquor of one-level foam device is 3.093m
3/ h or 3.191m
3/ h.After one step foaming device, can reach 60-80 doubly through test determination coefficient of foaming, in order further to strengthen utilization rate and the coefficient of foaming of resistanceization mixed liquor, in secondary foam device, carry out second time of foaming, final coefficient of foaming can reach 120-200 doubly, and the foam volume of generation is 360-700m
3/ h, surely the bubble time is greater than 20 hours.
After second time of foaming, pass through air transporting arrangement, through pre-buried pipeline, lazy colloid resistanceization bubble is transported to goaf, utilize flow behavior and transport characteristics that the lazy bubble of colloid resistanceization is good, colloid retardant 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 coal road spontaneous combustion effect, form one deck resistanceization film on 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 region, also play the effect that inhibition gas and water-gas fire.And foam has the advantages that viscosity is high, elasticity is large and density is little, can move and accumulate in the space in goaf, in stope caved gangue, set up the airtight district of air.Foam also has the character of anti-thermit powder, and the moisture in foam evaporates from absorbing heat, 1m around
3water flash to water vapour heat absorption 46021.5J, thermal capacity and the heat conductivility of coal have also increased simultaneously.Foam solution has good humidification to coal in addition, can form film on the surface of coal, hinders the absorption of coal to oxygen, weakens the oxidation of coal, reduces the electrothermal calefactive rate of coal.
After injecting the lazy bubble of colloid resistanceization, goaf spontaneous combustion is carried out to Real-Time Monitoring, carbon monoxide burst size obviously reduces, and temperature is also reduced in zone of reasonableness, anti-fire extinguishing successful.
Claims (6)
1. the lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion, is characterized in that: comprise successively connected jet-flow proportioning mixer apparatus, one-level foam device, secondary foam device and air transporting arrangement;
Jet-flow proportioning mixer apparatus comprises jet-flow proportioning blender, the water under high pressure import being connected with jet-flow proportioning mixer nozzle, the colloid resistanceization liquid import being connected with jet-flow proportioning blender imbibition chamber, and jet-flow proportioning blender delivery outlet is connected with one-level foam device inlet;
One-level foam device comprises the foaming chamber spiral nozzle that import is connected with colloid resistanceization liquid, in foaming chamber, be provided with foam screen, one-level foam device air inlet is connected with air transporting arrangement delivery outlet, and the outlet of one-level foam device foam solution is connected with the import of secondary foam device foam solution;
Air transporting arrangement is for providing the conveying device of gases at high pressure, and described gases at high pressure are nitrogen or carbon dioxide.
2. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1, is characterized in that: described jet-flow proportioning blender comprises nozzle, is positioned at the imbibition chamber of nozzle periphery, the trunnion being connected with imbibition chamber and the anemostat being connected with trunnion; Described anemostat is connected with jet-flow proportioning blender delivery outlet.
3. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1 and 2, is characterized in that: described foam screen is stainless steel compacting net, and described nozzle is spiral solid conical nozzle.
4. the lazy bubble preparation facilities of the colloid resistanceization 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 blender and resistanceization liquid inlet pipeline, be respectively equipped with explosion-proof vortex-shedding meter, filter screen and mining stop valve.
5. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1 and 2, it is characterized in that: one-level foam device is that flange is connected with the connection of secondary foam device, use two-stage foaming simultaneously or use separately one-level foaming according to the different choice of fed distance.
6. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1 and 2, is characterized in that: in one-level foam device, have foam screen, secondary foam device bottom is provided with tapping valve, and import is connected with air transporting arrangement delivery outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844415.8U CN203694462U (en) | 2013-12-19 | 2013-12-19 | Colloid inhibition inerting foam preparation device for preventing spontaneous combustion of coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844415.8U CN203694462U (en) | 2013-12-19 | 2013-12-19 | Colloid inhibition inerting foam preparation device for preventing spontaneous combustion of coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203694462U true CN203694462U (en) | 2014-07-09 |
Family
ID=51044966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320844415.8U Withdrawn - After Issue CN203694462U (en) | 2013-12-19 | 2013-12-19 | Colloid inhibition inerting foam preparation device for preventing spontaneous combustion of coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203694462U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691082A (en) * | 2013-12-19 | 2014-04-02 | 西安科技大学 | Colloid-inhibiting inert foam preparation device and process for preventing coal spontaneous combustion |
| CN110195610A (en) * | 2019-05-09 | 2019-09-03 | 中国矿业大学 | A kind of critical dry and wet dust-extraction unit of mining two-stage ultrafiltration |
-
2013
- 2013-12-19 CN CN201320844415.8U patent/CN203694462U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691082A (en) * | 2013-12-19 | 2014-04-02 | 西安科技大学 | Colloid-inhibiting inert foam preparation device and process for preventing coal spontaneous combustion |
| CN103691082B (en) * | 2013-12-19 | 2016-01-27 | 西安科技大学 | The lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion and technique thereof |
| CN110195610A (en) * | 2019-05-09 | 2019-09-03 | 中国矿业大学 | A kind of critical dry and wet dust-extraction unit of mining two-stage ultrafiltration |
| CN110195610B (en) * | 2019-05-09 | 2024-03-08 | 中国矿业大学 | Mining two-stage ultrafiltration critical dry-wet dust collector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20160127 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20160127 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |