CN100547226C - The high power inhibition foam and the generating means thereof of control spontaneous combustionof coal - Google Patents
The high power inhibition foam and the generating means thereof of control spontaneous combustionof coal Download PDFInfo
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- CN100547226C CN100547226C CNB200710078255XA CN200710078255A CN100547226C CN 100547226 C CN100547226 C CN 100547226C CN B200710078255X A CNB200710078255X A CN B200710078255XA CN 200710078255 A CN200710078255 A CN 200710078255A CN 100547226 C CN100547226 C CN 100547226C
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Abstract
The invention provides a kind of high power inhibition foam and generating means thereof of preventing and treating spontaneous combustionof coal.Pressure flow is mixed with high power inhibition foam stoste by certain ratio, then at hydraulic pressure with have the gas of certain pressure in ejector, to form under the effect of negative pressure to enter jet mixer together, gas, water and high power inhibition foam stoste enter foam maker by the mode of spraying and foam under gas pressure, form high power inhibition foam.Used device practicality is simple, unique, stoste can be made the foam of even size, and to be carrier with the foam with above-mentioned material be transported to needs to handle and zone that general material can not arrive.A spot of foaming stock solution just can produce the foam of enormousness, can cover coal body by the large tracts of land large space, reaches the purpose of economical and effective control coal spontaneous combustion.
Description
Technical field
The present invention relates to prevent and treat the retardant of spontaneous combustionof coal, a kind of especially high power inhibition foam and generating means thereof of preventing and treating spontaneous combustionof coal.
Background technology
Spontaneous combustionof coal is one of great disaster of coal mine and coal storage and transport process.In China state-owned emphasis colliery, exist the mine of serious coal spontaneous combustion to account for the over half of mine sum, the fire that is caused by coal spontaneous combustion accounts for more than 90% of mine fire sum.The safety in production in ore deposit is arrived in the spontaneous combustionof coal serious threat, and may cause gas explosion, casualties, destruction resource and cause great economic loss etc.The coal spontaneous combustion generally method of preventing and treating is to stop the generation of oxidation of coal process and elimination heat to gather, adopt both at home and abroad extensively grouting for this reason, spray physical type retardant (not obvious destruction coal body chemical constitution, the retardant of the spontaneous combustion tendency of not obvious change coal), annotate noble gas, the fire district such as is sealed at conventional preventing and extinguishing fire technology.In recent years, anti-fire-extinguishing technologies such as gel, steam fog retardant, resin foam have been adopted again more widely.These technology have played important function to guaranteeing mine safety production, but also have some problems: thick loess grouting can consume a large amount of farmlands, and the flyash plugging effect is poor, spoil slurrying cost height; Water glass-ammonium salt gel produces the poisonous ammonia that flavor is arranged, high-molecular gel cost height; Cement mortar, high-water material, foamed resin be cost height but also complex process not only; Noble gas is difficult for being trapped in the zone of injection easily with the diffusion of leaking out.In order to overcome the deficiency of existing anti-extinguishing method, begin one's study from the eighties in 20th century method of noble gas foam control spontaneous combustionof coal of states such as the former Soviet Union, France, Poland, Bulgaria.China has also carried out the research of pressure injection noble gas foam control goaf spontaneous fire in " eight or five " in the early 1990s in the key scientific and technological projects, but is only used for the improvement of mine exogenous fire (fire beyond the coal spontaneous combustion).China Mining University develops the technology of three-phase froth control spontaneous combustionof coal in recent years, but its not tangible resistance turns usefulness into, is not suitable for the prevention of coal spontaneous combustion, is vital and prevent to prevent and treat for coal spontaneous combustion.
Summary of the invention
At present technical problem, the invention provides a kind of high power inhibition foam and generating means thereof of preventing and treating spontaneous combustionof coal.Concrete technical scheme is as follows:
The high power inhibition foam generating means of control coal spontaneous combustion provided by the present invention, comprise pipette, Venturi tube, blender, foam maker and all steep device, blender is an injecting type negative pressure blender, and the blender entrance point links to each other with the forced draft pipe, and the port of export connects foam maker; Foam maker is a sloping baffle eddy current type foam maker, and foam maker links to each other with the foam outlet pipe by all steeping device; The Venturi tube entrance point links to each other with the pressure flow pipe, and the port of export is connected with blender throat by bypass duct; Pipette one end stretches in the original liquid box, and the other end is connected with Venturi tube throat.
In the present invention, the certain pressure current are by producing negative pressure in Venturi tube throat after the Venturi tube, and this negative pressure sucks the high power inhibition foam stoste in the original liquid box and tentatively mixes with water.There is the gas of certain pressure to produce negative pressure simultaneously in the throat of injecting type negative pressure blender, this negative pressure sucks the preliminary mixture of water and stoste, and enter in the sloping baffle eddy current type foam maker by spray regime with gas and to foam, form high power inhibition foam and make the foam size more even, inject coal goaf etc. by the foam outlet pipe then and need prevent the zone of putting out a fire through all steeping device.
The high power inhibition foam of control spontaneous combustionof coal is to be made by following step:
(1) preparation of high power inhibition foam stoste with composite blowing agent, foam stabilizer, absorbent material and chemical retardant by mass ratio 10: 10: 1: 1 mixed preparing forms; Wherein said composite blowing agent forms by the kinds of surface activating agent is composite, and foam stabilizer is a water glass, absorbent material be water absorbing capacity at least greater than 500 times hydroscopic high-molecular resin, chemical retardant is selected from various oxidants:
(2) stoste with step (1) gained is contained in the original liquid box, utilizes the described high power inhibition foam generating means of claim 1, makes high power inhibition foam.
The mass ratio of high power inhibition foam stoste and pressure flow is 1: 25～100 in the step (2).
Chemical retardant is mainly selected oxidant for use, oxidant selection principle during preparation high power inhibition foam stoste: 1) do not produce toxic and harmful with oxidation of coal; 2) after being diluted to finite concentration, contact and do not produce harm with human body; 3) soluble in water.To the strong stair oxidation agent of the best selective oxidation of the higher coal of spontaneous combustion tendency, as perchlorate, permanganic acid salt, peroxide etc., to the more weak secondary oxidation agent of the then general selective oxidation of the coal that is difficult for spontaneous combustion such as periodic acid, Peracetic acid, Calcium perchlorate etc.
The pressure of pressure flow pipe 4 is greater than 0.3MP, and flow utilizes water flow control valve 5 to regulate as required, and the mass ratio of general requirements high power inhibition foam stoste and water is between 1: 100～500; The pressure of forced draft pipe 7 is greater than 0.3MP, utilize air flow rate control valve 8 to regulate the throughput that enters foam maker according to coefficient of foaming, and air-flow volume flow at normal temperatures and pressures should be volume flow * 1.1 of the coefficient of foaming * water that needs.
High power inhibition foam stoste of the present invention is made of composite blowing agent, foam stabilizer, absorbent material and chemical retardant, and its mass ratio is 10: 10: 1: 1, under the effect of press water and pressed gas, obtain high power inhibition foam by this foam device foaming.Composite blowing agent reduces and foaming under external force the surface tension of the aqueous solution, and can make the aqueous solution soak into the hole of coal body inside better, the local chemical retardant that oxygen can be arrived can both reach substantially, makes the resistance effect of chemical retardant better.The effect of steady foaming agent is to make the foam life period long, good stability.Absorbent material can constantly absorb moisture from air makes coal body keep moistening always, be beneficial to chemistry resistance and turn into realizing, simultaneously the colloid diaphragm of Xing Chenging to a certain extent secluding air enter coal body.
The invention has the beneficial effects as follows that used device does not use in preparation high power inhibition foam process adds the pump housing as power, as long as the air flow source of certain pressure and aqueous stream source are arranged just can operate, owing to there is not electric equipment, structure is simple more, reliable, reduced the resistance that the foam device convection cell produces, easy to operate, economic and practical, raw material adding place all adopts negative pressure to suck design, guarantees that mixing material can not flow backwards under any air pressure and hydraulic condition.Prepared high power foam contains chemical retardant and the various auxiliary element of preventing and treating spontaneous combustionof coal, and foam has good flowability, and fill characteristic upwards is carrier with the foam with above-mentioned material is transported to needs to handle and zone that general material can not arrive.A spot of foaming stock solution just can produce the foam of enormousness, can cover coal body by the large tracts of land large space, reaches the purpose of economical and efficient control coal spontaneous combustion.
Description of drawings
Fig. 1 is the structural representation of high power inhibition foam generating means
Fig. 2 is the FB(flow block) of preparation high power inhibition foam.
Specific embodiment
In conjunction with the accompanying drawings preparation embodiment of the present invention is described further again below:
As shown in Figure 1, the high power inhibition foam generating means of the control coal spontaneous combustion that the utility model provides has pipette 2, Venturi tube 6, blender 9, foam maker 10 and all steeps device 11.Blender 9 is an injecting type negative pressure blender, and blender 9 entrance points link to each other with forced draft pipe 7, and the port of export connects foam maker 10; Foam maker 10 is a sloping baffle eddy current type foam maker, and foam maker 10 links to each other with foam outlet pipe 12 by all steeping device 11; Venturi tube 6 entrance points link to each other with pressure flow pipe 4, and the port of export is connected with blender 9 throats by bypass duct; Pipette 2 one ends stretch in the original liquid box 1, and the other end is connected with Venturi tube 6 throats.
As can be seen from Figure 1: forced draft pipe 7, pressure flow pipe 4 and pipette 2 are separately installed with control valve 8, control valve 5 and control valve 3, thereby can carry out timely adjustment to air-flow, current and former liquid measure according to the coefficient of foaming of required high power inhibition foam.
The composite blowing agent of stoste be should prepare during preparation earlier and neopelex, lauryl sodium sulfate and protein expanding foam solution selected for use, by mass ratio is preparation in 2: 1: 1, stabilizing agent is selected for use and is water glass, absorbent material is selected the hydroscopic high-molecular resin of 800 times of water absorbing capacities for use, chemical retardant is selected potassium permanganate for use, and be 10: 10: 1 with composite blowing agent, foam stabilizer water glass, water-absorbing resin and chemical retardant according to mass ratio: 1 is uniformly mixed to form high power inhibition foam stoste.
In the preparation, the pressure of pressure flow pipe 4 is greater than 0.3MP, and flow utilizes water flow control valve 5 to regulate as required, and the mass ratio of high power inhibition foam stoste and water is 1: 400; The pressure of forced draft pipe 7 is greater than 0.3MP, the coefficient of foaming that needs is 100 times, and air-flow volume flow at normal temperatures and pressures should be volume flow * 1.1 of the coefficient of foaming * water that needs, when the volume flow of water is 5m
3During/h, the volume flow of air-flow is 550m as calculated
3/ h utilizes the air flow rate control valve to regulate the throughput that enters foam maker.
Its preparation roughly comprises following process according to FB(flow block) shown in Figure 2:
1, pressure flow forms the high power inhibition foam stoste that will contain in original liquid box 1 in throat's position formation negative pressure of Venturi tube 6 behind the jet through Venturi tube 6 and enters Venturi tube 6 by pipette 2 through control valves 3, and tentatively mixes with pressure flow;
2, forced draft enters through control valve 8 and sprays negative pressure blender 9, and spraying negative pressure blender 9 throats place formation negative pressure, make the mixed liquor of high power inhibition foam stoste and pressure flow can enter injection negative pressure blender 9 smoothly, forced draft, pressure flow and high power inhibition foam stoste are further mixed in spraying negative pressure blender 9;
3, under the effect of pressure flow, forced draft, forced draft, pressure flow and high power inhibition foam stoste carry out further evenly mixing in foam maker 10, make liquid fully wrap up gas, form high power inhibition foam, and make the foam size more even through all steeping device 11, be transported to by foam outlet pipe 12 then and annotate the bubble zone and carry out the coal spontaneous combustion control.
Claims (4)
1, a kind of high power inhibition foam generating means of preventing and treating spontaneous combustionof coal, comprise pipette (2), Venturi tube (6), blender (9), foam maker (10) and all steep device (11), it is characterized in that: described blender (9) is an injecting type negative pressure blender, blender (9) entrance point links to each other with forced draft pipe (7), and the port of export connects foam maker (10); Foam maker (10) is a sloping baffle eddy current type foam maker, and foam maker (10) links to each other with foam outlet pipe (12) by all steeping device (11); Venturi tube (6) entrance point links to each other with pressure flow pipe (4), and the port of export is connected with blender (9) throat by bypass duct; Pipette (2) one ends stretch in the original liquid box (1), and the other end is connected with Venturi tube (6) throat.
2, the high power inhibition foam generating means of control spontaneous combustionof coal according to claim 1 is characterized in that: described forced draft pipe (7), pressure flow pipe (4) and pipette (2) are separately installed with control valve (8,5,3).
3. high power inhibition foam of preventing and treating spontaneous combustionof coal is characterized in that being made by following step:
(1) preparation of high power inhibition foam stoste with composite blowing agent, foam stabilizer, absorbent material and chemical retardant by mass ratio 10: 10: 1: 1 mixed preparing forms; Wherein said composite blowing agent is to form by the kinds of surface activating agent is composite, and foam stabilizer is a water glass, absorbent material be water absorbing capacity at least greater than 500 times hydroscopic high-molecular resin, chemical retardant is selected from various oxidants;
(2) stoste with step (1) gained is contained in the original liquid box (1), utilizes the described high power inhibition foam generating means of claim 1, makes high power inhibition foam.
4. the mass ratio of high power inhibition foam stoste and pressure flow is 1: 25～100 in the high power inhibition foam of control spontaneous combustionof coal as claimed in claim 3, step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB200710078255XA CN100547226C (en) | 2007-03-05 | 2007-03-05 | The high power inhibition foam and the generating means thereof of control spontaneous combustionof coal |
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| CNB200710078255XA CN100547226C (en) | 2007-03-05 | 2007-03-05 | The high power inhibition foam and the generating means thereof of control spontaneous combustionof coal |
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| CN101021160A CN101021160A (en) | 2007-08-22 |
| CN100547226C true CN100547226C (en) | 2009-10-07 |
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