CN101476479B - Foam type stopping agent for preventing mine coal spontaneous combustion and its use method - Google Patents
Foam type stopping agent for preventing mine coal spontaneous combustion and its use method Download PDFInfo
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- CN101476479B CN101476479B CN200910116090XA CN200910116090A CN101476479B CN 101476479 B CN101476479 B CN 101476479B CN 200910116090X A CN200910116090X A CN 200910116090XA CN 200910116090 A CN200910116090 A CN 200910116090A CN 101476479 B CN101476479 B CN 101476479B
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Abstract
The invention discloses a foam retardant for preventing mine well from spontaneously combusting and a using method thereof. The retardant is characterized in that according to the gross mass of a chemical retardant, 0.5 to 2 percent of oxidizing agent is dissolved in water, and then 1 to 1.5 percent of foaming agent, 0.2 to 0.4 percent of foam stabilizing agent, 0.05 to 0.1 percent of thickening agent and 0.05 to 0.1 percent of emulsifying agent are sequentially added and stirred uniformly so as to prepare the chemical retardant; according to the gross mass of a physical retardant, 10 to 15 percent of inorganic salt and other compositions are added by the same method as the former so as to prepare the physical retardant; when the retardant is used, the chemical retardant is diluted into an aqueous solution with a concentration of between 1.76 and 4.1 weight percent first, and the aqueous solution is sprayed to a target coal layer area; after 30 minutes to 1 hour, the physical retardant which is diluted into an aqueous solution with a concentration of between 11.06 and 16.9 weight percent is sprayed into the same area; and inhibition foams are covered on the surface of the coal layer so as to achieve the effect of preventing the spontaneous combustion for a long time on the coal layer of the area.
Description
Technical field
The invention belongs to control mine coal spontaneous combustion technical field, be specifically related to contain the foam type retardant and the using method thereof of oxidant, inorganic salts and surfactant.
Background technology
The retardant of existing control mine coal spontaneous combustion can be divided into physics retardant and chemical retardant two big classes.The physics retardant comprises sodium chloride (NaCl), calcium chloride (CaCl mainly based on inorganic salts
2) and magnesium chloride (MgCl
2) etc.; Because these class inorganic salts have stronger water imbibition, when they can absorb airborne moisture content during attached to coal surperficial, thereby reduce the temperature in coal seam and form moisture liquid film on coal grain surface, stop coal to contact with oxygen, play oxygen barrier and hinder and turn usefulness into.Chemical retardant then is the novel retardant that proposes in recent years.The use rubber antioxidant that for example disclosed chemical retardant based on oxidant of Chinese patent CN100999996, and Zhang Gongci etc. proposes in " novel retardant is in the application in Geng Cun colliery " literary composition of delivering on " Central Region coal " magazine first phase in 2004 prevents spontaneous combustionof coal as retardant.Chemical retardant is the mechanism at spontaneous combustionof coal, catches or the passivation free radical reaction chain of blocking-up oxidation of coal, the spontaneous combustion tendency of reduction coal, the spontaneous combustion period of prolongation coal before free group of coal body surface-active and oxygen reaction in a large number.
Though the method for traditional sprinkling perfusion retardant can play a role to the control spontaneous combustionof coal, but bigger limitation is arranged, particularly for some long and narrow mine laneways, adopt conventional method liquid retardant (comprising physics retardant and chemical retardant) can't be sprayed and be filled into the appointed area, and be difficult to accomplish to be evenly distributed, duration of fire resistance is also limited; Usually the inaccessible effective fire-retardant prevention effect of mine coal that the mode of taking at present that two kinds of retardants are used is separately had relatively high expectations for the control spontaneous combustion.The all inaccessible desirable prevention effect of mine coal that existing above-mentioned conventional method is had relatively high expectations to spontaneous combustionof coal.
Summary of the invention
The objective of the invention is to propose a kind of foam type retardant and using method thereof of preventing and treating the mine coal spontaneous combustion, to overcome the above-mentioned defective of prior art.
The foam type retardant of control mine of the present invention coal spontaneous combustion is characterized in that being made up of jointly chemical retardant that is used and physics retardant;
Described chemical retardant is by forming by the frother of the oxidant that accounts for mass percent 0.5～2% and 1～1.5%, 0.2～0.4% foam stabiliser, 0.05～0.1% thickener and 0.05～0.1% emulsifier;
Described physics retardant is by forming by the frother of the inorganic salts that account for mass percent 10～15% and 1～1.5%, 0.2～0.4% foam stabiliser, 0.05～0.1% thickener and 0.05～0.1% emulsifier.
Described oxidant is selected from the stronger permanganate of oxidisability, chlorate, hypochlorite or peroxide;
Described inorganic salts are selected from stronger chloride of water imbibition or sulfate;
Described frother is a fatty alcohol ether sulfosuccinate disodium salt (MES);
Described foam stabiliser is selected from DDAO (OB-2) or α-sodium olefin sulfonate (AOS);
Described thickener is selected from Cocoamidopropyl betaine (CAB) or polyacrylamide (PAM);
Described emulsifier is APES (OP-10).
The using method of the foam type retardant of control mine of the present invention coal spontaneous combustion, it is characterized in that earlier chemical retardant being diluted to the aqueous solution that concentration is 1.76～4.1wt%, adopt the zone, coal seam that spray gun is sprayed onto needs the control spontaneous combustion, through 30 minutes to one hour, the physics retardant that will be diluted to concentration again and be the aqueous solution of 11.06～16.9wt% was sprayed onto the same coal seam zone with spray gun; Resistanceization liquid is that carrier is covered in the surface, coal seam with the foam after lance ejection.
Because the chemical retardant that the present invention prevents and treats in the foam type retardant of mine coal spontaneous combustion is the aqueous solution that oxidant and surfactant mix, be based on the principle of oxidant and the free radical reaction of coal body surface-active and prevent and treat spontaneous combustionof coal, when it is sprayed onto the zone, coal seam that need prevent and treat spontaneous combustion with spray gun, the oxidant that with the foam is carrier can cover the surface, coal seam more equably, through frother, foam stabiliser, the foam that thickener and emulsifier acting in conjunction produce has certain intensity, can have 3～12 hours under 35～50 ℃ of conditions, one deck foam that the incipient stage covers on the coal seam earlier can play the effect of oxygen barrier resistanceization.But, can disappear behind the certain hour because foam is a Unstable Systems; And because of the time that influences lather collapse that is subjected to several factors also is different; Uncracked foam still play the oxygen barrier resistanceization effect in, oxidant on the breaking foam then covers to the coal seam or infiltrates in the coal seam, can before free group of coal body surface-active and oxygen reaction, catch in a large number or the passivation free radical, the reaction chain of blocking-up oxidation of coal, the spontaneous combustion tendency of reduction coal.After foam collapsed to complete obiteration successively, oxidant just further played the effect of chemistry resistanceization in the lather collapse zone.
The present invention prevents and treats chemical retardant in the foam type retardant of mine coal spontaneous combustion based on the principle of oxidant and the free radical reaction of coal body surface-active and prevent and treat spontaneous combustionof coal, though the better prevention effect is arranged, but can not make the group's passivation of all living radical and lose the ability of low-temperature oxidation, and oxidant also may be combustion-supporting under higher temperature, and the coal seam still has the possibility that spontaneous combustion takes place under the independent effect of chemical retardant.Therefore the present invention has also adopted the technology that the physics resistanceization combines with the chemistry resistanceization.
The physics retardant that the present invention prevents and treats in the foam type retardant of mine coal spontaneous combustion is the aqueous solution that inorganic salts and surfactant mix, and produces a large amount of bubble jet through spray gun and is spread across on the coal seam, and the effect that foam played is identical with the front.Inorganic salts in foam and the foam play the effect of physics resistanceization jointly, after the lather collapse, the stronger inorganic salts of water imbibition are just attached to the surface of coal, absorb airborne moisture content, can reduce the temperature in coal seam on the one hand, can form moisture liquid film on coal grain surface on the other hand, thereby stop coal to contact, play the oxygen barrier resistance and turn usefulness into oxygen.The physics retardant is placed on behind chemical retardant uses, the physics resistance that can bring into play inorganic salts on the one hand turns usefulness into, can reduce the temperature in coal seam on the other hand and keep the coal seam to have certain humidity, like this, unreacted oxidant can continue to bring into play the effect of chemistry resistanceization in wet environment, and reduces the coal seam temperature and can also avoid oxidant generation high temperature combustion-supporting.
The present invention prevents and treats the foam type retardant of mine coal spontaneous combustion owing to adopt chemistry resistanceization and physics resistanceization to combine, be the composite treatment technology of carrier with the foam, the shortcoming that overcome that conventional method resistanceization efficient is low, retardant covers the fire-retardant prevention effect difference of being brought such as inhomogeneous can reach the preferable effect of spontaneous combustionof coal control.
The specific embodiment
When the present invention program specifically implements, select oxidant and bibulous inorganic salts earlier for use, by the gross mass of the chemical retardant after being made into, oxidant accounts for 0.5～2%, frother accounts for 1～1.5%, foam stabiliser accounts for 0.2～0.4%, thickener accounts for 0.05～0.1%, emulsifier accounts for 0.05～0.1%; At first that oxidant is water-soluble, then other composition is joined in the oxidizing agent solution successively, obtain chemical retardant behind the stirring and evenly mixing; By the gross mass of the physics retardant after being made into, inorganic salts account for 10～15%, and the order of other composition and consumption and adding is identical with the chemical retardant of front with manner of formulation, same dilute with water, and stirring and evenly mixing obtains the physics retardant.When the control spontaneous combustionof coal uses, earlier chemical retardant is diluted to the aqueous solution that concentration is 1.76～4.1wt%, adopt the zone, coal seam that foam lance is sprayed onto needs the control spontaneous combustion, through 30 minutes to one hour, the physics retardant that will be diluted to concentration again and be the aqueous solution of 11.06～16.9wt% was sprayed onto the same coal seam zone with foam lance; Resistanceization liquid all is that carrier is covered in the surface, coal seam with the foam after lance ejection, can reach the effect of long-time control spontaneous combustion to this regional coal seam.Specific implementation process is exemplified below:
Embodiment 1:
The preparation process of the chemical retardant in the present embodiment is: the potassium permanganate that takes by weighing 1g, 2g fatty alcohol ether sulfosuccinate disodium salt (MES), 0.2g DDAO (OB-2), 0.2g α-sodium olefin sulfonate (AOS), 0.1g Cocoamidopropyl betaine (CAB), 0.02g polyacrylamide (PAM) and 0.1g APES (OP-10) are dissolved in the 196.38g water successively, are stirred to homogeneous phase.
The preparation process of physics retardant is: take by weighing 8g calcium chloride (CaCl
2), 12g magnesium chloride (MgCl
2), the fatty alcohol ether sulfosuccinate disodium salt (MES) of 2g, 0.2g DDAO (OB-2), 0.2g α-sodium olefin sulfonate (AOS), 0.1g Cocoamidopropyl betaine (CAB), 0.02g polyacrylamide (PAM) and 0.1g APES (OP-10) are dissolved in the 177.38g water successively, are stirred to homogeneous phase.
Retardant using method and contrast experiment's process thereof in the present embodiment are:
Take by weighing 100g coal earlier, after mill is pulverized, placing capacity is the beaker of 500ml, with foam lance the chemical retardant for preparing being ejected a large amount of foams is sprayed in the beaker, foam is full of whole beaker, putting into a capacity that contains 100ml water then is the beaker of 1L, puts into 40 ℃ of baking ovens after the beaker sealing with this 1L.After treating the foam complete obiteration in about 3～12 hours, carry out carbonomonoxide concentration and detect in real time, obtain the concentration maximum value.Do one group of blank assay (promptly not inhibiting), Cmax value and the former who obtains compared, found that the sample CO Cmax value after resistanceization has reduced by 70% than the control sample without resistanceization.Again residue is dried and carry out infrared spectrum analysis, observe the variation of resistanceization front and back functional group, found that the functional group such as aromatic hydrocarbons, the obvious minimizing of methyl class vibration peak or the disappearance that are easy to oxidation.
Repeat according to the method described above once to test, treat behind the lather collapse physics retardant solution is sprayed to coal seam after the chemical retardant resistanceization with spray gun, foam is put into the 1L beaker that contains 100ml water after being full of whole 500ml beaker, put into 40 ℃ of baking ovens after the sealing, by the time after the foam complete obiteration in about 10～24 hours, carry out carbonomonoxide concentration and detect in real time, obtain the concentration maximum value.Do one group of not blank assay of inhibiting again, Cmax value and the former who obtains compared, found that through chemical retardant and the coefficient coal seam of physics retardant, its CO Cmax than the reduction of resistanceization not 90%.
Embodiment 2:
The preparation process of the chemical retardant in the present embodiment is: the potassium permanganate that takes by weighing 2g, 2.4g fatty alcohol ether sulfosuccinate disodium salt (MES), 0.6g DDAO (OB-2), 0.1g Cocoamidopropyl betaine (CAB), 0.02g polyacrylamide (PAM) and 0.15g APES (OP-10), be dissolved in successively in the 194.73g water, be stirred to homogeneous phase.
The preparation process of physics retardant is: take by weighing 10g calcium chloride (CaCl
2), 14g magnesium chloride (MgCl
2), 2.4g fatty alcohol ether sulfosuccinate disodium salt (MES), 0.6g DDAO (OB-2), 0.1g Cocoamidopropyl betaine (CAB), 0.02g polyacrylamide (PAM) and 0.15g APES (OP-10), be dissolved in successively in the 172.73g water, be stirred to homogeneous phase.
Retardant using method and contrast experiment's process thereof in the present embodiment are:
Take by weighing 100g coal earlier, after mill is pulverized, placing capacity is the beaker of 500ml, with foam lance the chemical retardant for preparing being ejected a large amount of foams is sprayed in the beaker, foam is full of whole beaker, putting into a capacity that contains 100ml water then is the beaker of 1L, puts into 40 ℃ of baking ovens after the beaker sealing with this 1L.After treating the foam complete obiteration in about 3～12 hours, carry out carbonomonoxide concentration and detect in real time, obtain the concentration maximum value.Do one group of not inhibiting blank assay, Cmax value and the former who obtains compared, found that the sample CO Cmax value after resistanceization has reduced by 70% than the control sample without resistanceization.Again residue is dried and carry out infrared spectrum analysis, observe the variation of resistanceization front and back functional group, found that the functional group such as aromatic hydrocarbons, the obvious minimizing of methyl class vibration peak or the disappearance that are easy to oxidation.
Repeat according to the method described above once to test, treat behind the lather collapse physics retardant solution is sprayed to coal seam after the chemical retardant resistanceization with spray gun, foam is put into the 1L beaker that contains 100ml water after being full of whole 500ml beaker, put into 40 ℃ of baking ovens after the sealing, after foam complete obiteration by the time in about 10～24 hours, carry out carbonomonoxide concentration and detect in real time, obtain the concentration maximum value.Do one group of blank assay (promptly not inhibiting) again, Cmax value and the former who obtains compared, found that through chemical retardant and the coefficient coal seam of physics retardant, its CO Cmax than the reduction of resistanceization not 90%.
Embodiment 3:
The preparation process of the chemical retardant in the present embodiment is: the potassium permanganate that takes by weighing 4g, 3g fatty alcohol ether sulfosuccinate disodium salt (MES), 0.8g α-sodium olefin sulfonate (AOS), 0.15g Cocoamidopropyl betaine (CAB), 0.05g polyacrylamide (PAM) and 0.2g APES (OP-10), be dissolved in successively in the 191.8g water, be stirred to homogeneous phase.
The preparation process of physics retardant is: take by weighing 10g calcium chloride (CaCl
2), 20g magnesium chloride (MgCl
2), the fatty alcohol ether sulfosuccinate disodium salt (MES) of 3g, 0.8g α-sodium olefin sulfonate (AOS), 0.15g Cocoamidopropyl betaine (CAB), 0.05g polyacrylamide (PAM) and 0.2g APES (OP-10) are dissolved in the 165.8g water successively, are stirred to homogeneous phase.
Retardant using method and contrast experiment's process thereof in the present embodiment are:
Take by weighing 100g coal earlier, after mill is pulverized, placing capacity is the beaker of 500ml, with foam lance the chemical retardant for preparing being ejected a large amount of foams is sprayed in the beaker, foam is full of whole beaker, putting into a capacity that contains 100ml water then is the beaker of 1L, puts into 40 ℃ of baking ovens after the beaker sealing with this 1L.After treating the foam complete obiteration in about 3～12 hours, carry out carbonomonoxide concentration and detect in real time, obtain the concentration maximum value.Do one group of not blank assay of inhibiting, Cmax value and the former who obtains compared, found that the sample CO Cmax value after resistanceization has reduced by 70% than the control sample without resistanceization.Again residue is dried and carry out infrared spectrum analysis, observe the variation of resistanceization front and back functional group, found that the functional group such as aromatic hydrocarbons, the obvious minimizing of methyl class vibration peak or the disappearance that are easy to oxidation.
Repeat according to the method described above once to test, treat behind the lather collapse physics retardant solution is sprayed to coal seam after the chemical retardant resistanceization with spray gun, foam is put into the 1L beaker that contains 100ml water after being full of whole 500ml beaker, put into 40 ℃ of baking ovens after the sealing, after foam complete obiteration by the time in about 10～24 hours, carry out carbonomonoxide concentration and detect in real time, obtain the concentration maximum value.Do one group of not blank assay of inhibiting again, Cmax value and the former who obtains compared, found that through chemical retardant and the coefficient coal seam of physics retardant, its CO Cmax than the reduction of resistanceization not 90%.
Claims (8)
1. a foam type retardant of preventing and treating the mine coal spontaneous combustion is characterized in that being made up of jointly chemical retardant that is used and physics retardant;
Described chemical retardant is by forming by the frother of the oxidant that accounts for this chemical retardant mass percent 0.5～2% and 1～1.5%, 0.2～0.4% foam stabiliser, 0.05～0.1% thickener and 0.05～0.1% emulsifier;
Described physics retardant is by forming by the frother of the inorganic salts that account for this physics retardant mass percent 10～15% and 1～1.5%, 0.2～0.4% foam stabiliser, 0.05～0.1% thickener and 0.05～0.1% emulsifier;
Described being used is meant that elder generation is sprayed onto the zone, coal seam that needs the control spontaneous combustion with chemical retardant, through 30 minutes to one hour, is sprayed onto the same coal seam zone with the physics retardant again.
2. prevent and treat the foam type retardant of mine coal spontaneous combustion according to claim 1, be characterised in that described oxidant is selected from permanganate, hypochlorite or peroxide.
3. prevent and treat the foam type retardant of mine coal spontaneous combustion according to claim 1, be characterised in that described inorganic salts are selected from chloride or sulfate.
4. prevent and treat the foam type retardant of mine coal spontaneous combustion according to claim 1, be characterised in that described frother is a fatty alcohol ether sulfosuccinate disodium salt.
5. prevent and treat the foam type retardant of mine coal spontaneous combustion according to claim 1, be characterised in that described foam stabiliser is selected from DDAO or α-sodium olefin sulfonate.
6. prevent and treat the foam type retardant of mine coal spontaneous combustion according to claim 1, be characterised in that described thickener is selected from Cocoamidopropyl betaine or polyacrylamide.
7. prevent and treat the foam type retardant of mine coal spontaneous combustion according to claim 1, be characterised in that described emulsifier is an APES.
8. the using method of the foam type retardant of the described control mine of claim 1 coal spontaneous combustion, it is characterized in that earlier chemical retardant being diluted to the aqueous solution that concentration is 1.76～4.1wt%, be sprayed onto the zone, coal seam that needs the control spontaneous combustion, through 30 minutes to one hour, the physics retardant that will be diluted to concentration again and be the aqueous solution of 11.06～16.9wt% was sprayed onto the same coal seam zone; Resistanceization liquid all is that carrier is covered in the surface, coal seam with the foam.
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| CN200910116090XA CN101476479B (en) | 2009-01-20 | 2009-01-20 | Foam type stopping agent for preventing mine coal spontaneous combustion and its use method |
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| CN200910116090XA CN101476479B (en) | 2009-01-20 | 2009-01-20 | Foam type stopping agent for preventing mine coal spontaneous combustion and its use method |
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Cited By (1)
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| RU2768722C1 (en) * | 2019-01-16 | 2022-03-24 | Кванхи ЛИ | Multifunctional agent of foaming concentrate type for bituminous coal spontaneous combustion suppression |
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| CN103306711B (en) * | 2013-06-14 | 2015-10-28 | 陕煤集团神木张家峁矿业有限公司 | A kind of compound retardant preventing spontaneous combustion of pulverized coal and preparation method thereof |
| CN103306710B (en) * | 2013-06-14 | 2015-10-28 | 陕煤集团神木张家峁矿业有限公司 | A kind of compound retardant preventing spontaneous combustion of pulverized coal |
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| CN109091791A (en) * | 2018-09-28 | 2018-12-28 | 淮南宏阳工贸有限责任公司 | A kind of production technology of NEW TYPE OF COMPOSITE three-phase froth resistanceization fire extinguishing material |
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