CN102748002A - Method for extinguishing underground gasification furnace of coal - Google Patents
Method for extinguishing underground gasification furnace of coal Download PDFInfo
- Publication number
- CN102748002A CN102748002A CN2012102605743A CN201210260574A CN102748002A CN 102748002 A CN102748002 A CN 102748002A CN 2012102605743 A CN2012102605743 A CN 2012102605743A CN 201210260574 A CN201210260574 A CN 201210260574A CN 102748002 A CN102748002 A CN 102748002A
- Authority
- CN
- China
- Prior art keywords
- additive
- furnace
- coal
- stove
- underground
- 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.)
- Pending
Links
Images
Abstract
The invention provides a method for extinguishing an underground gasification furnace of coal. In the later period of the life cycle of the underground gasification furnace, chemical products, such as alkali metal hydrocarbonate, ammonium phosphate salt, and the like, are added into a furnace extinguishing gas, so as to achieve the purposes of accelerating the process of extinguishing the underground gasification furnace and controlling the furnace extinguishing time, wherein after the chemical products are heated, inflaming retarding gases, such as CO2, can be generated. According to the method, no additional excessive equipment is required, the cost is low and the method is easy to implement.
Description
Technical field
The present invention relates to underground coal gasification(UCG) process control field, relate in particular to a kind of underground coal gasification(UCG) and put out the stove method.
Background technology
Underground coal gasification(UCG) is exactly to make underground coal turn to the technology of fuel gas through thermal chemical reaction pirouette, and it is that collection shaft building, coal mining, conversion three big technologies are one, the new technology of multidisciplinary develop energy and industrial chemicals.It is converted into chemistry with the physics coal-mining method and mines; Whole huge, heavy coal excavation apparatus and ground equipment for gasification have been abandoned; And conventional floor burning is converted into underground controlledly burning; Thereby be a kind of clean coal comprehensive utilization technique, have that safety is good, small investment, efficient are high, pollute little, benefit advantages of higher.
Underground coal gasification(UCG) at first certainly face down and drill the hole to the coal seam; In inside, coal seam boring is linked up again; Pipeline is input to the coal seam through ground with gasifying agent (like air, water vapour, oxygen-enriched air etc.) with one of them boring; The coal seam is imperfect combustion under the effect of gasifying agent, and recurs gasification, and the fuel gas of generation is transported to ground from another boring.Above-mentioned underground gasification system is commonly referred to as underground gasification furnace.
Along with the carrying out of underground gasification process, Coal-fired capacity progressively adds up, and the combustion dead zone that stays (refer in the underground coal gasification(UCG) process because coal combustion and gasification and the cavity that in the coal seam, stays) is increasing, and the underground gasification furnace gas outlet temperature raises gradually.And; Accumulation along with surface, coal seam grieshoch; The intensity of gasification in coal seam also progressively descends, and coal seam roof and floor stability is also along with the increase of combustion dead zone variation gradually, the underground gasification furnace combustion dead zone surrounding environment aquifer water combustion dead zone that also can progressively permeate the ground; Effective coal gas output can reduce gradually in the output gas component, and the coal gas water content also can be increasingly high.This situation just shows that this underground gasification furnace has got into the later stage of gasification, and its life cycle closes to an end.When finishing underground gasification, need underground gasification furnace be extinguished, waste resource to prevent the coal seam sustained combustion, and the stability that increases underground combustion dead zone, and prevent to fire dead zone and aquifer conducting.Also need carry out filling, to prevent to fire subsiding on a large scale of dead zone under certain condition, to the combustion dead zone.
That taked puts out water filling in the oriented gasification furnace of stove method, injects fire-retardant or not combustion-supporting gas methods such as (are called and put out the stove medium) such as steam, nitrogen injection in the past.It is longer that but most methods are put out the stove time, and need a large amount of gas circulation to inject with cooling, with high costs.
For example; Prior art one; Patent 201010103397 " the plural gel fireproofing extinguishing materials that is used for coal bed fire hazard treating " has been introduced a kind of plural gel fireproofing extinguishing materials of preventing and treating coal mine fire, is made up of water glass base-material, setting accelerator, compound aggregate and thickener material.The thickener that is added can increase the denseness of colloid, and improves the suspension of mixture slurry.Preparation technology is simple for this plural gel, is easy to field conduct and uses; The gel that forms has certain intensity, can play the leak stopping effect; The raw material source is abundant, cheap; Product is nontoxic tasteless, does not pollute the down-hole mine, to the human non-toxic side effect.But it is applicable to the leak stopping and anti-fire extinguishing of mine, if be used for the big cavity after the underground gasification burning, its operability is not strong, and basic being difficult to realized.
Prior art two; Patent 200910015535 " method for extinguishing underground gasification furnace by charging nitrogen ", this method are at the floor mounted nitrogen making machine, and the nitrogen of making charges in the gasification furnace through inlet channel; Thereby breaking off gasification furnace oxygen puts out a fire; And constantly charging in the process, furnace heat is cemented out, discharge ground from extract duct and lower the temperature.The advantage of this invention is, because that nitrogen does not burn is not combustion-supporting, can play the purpose of disconnected oxygen, and after-heat cements out in constantly charging in the process stove, makes no longer resume combustion of residual coal in the stove, realizes thoroughly going out stove.But because the underground gasification furnace cavity volume is bigger, the nitrogen that needs is more, and circulation cooling in the use, and its economy is relatively poor relatively.
Prior art three, patent 200910015541 (method for extinguishing underground gasification furnace by spraying mist) is in the induction port of ground inlet channel, to arrange shower nozzle, shower nozzle is connected on the inlet channel; Air blast limit water spray in the Bian Xianglu distinguished and admirablely is mixed into water smoke with water and gets in the gasification furnace, and water smoke is met the red-hot gasification coal seam formation steam that gasified; Discharge from the exhaust passage, in said process carried out, furnace heat constantly shifts gave steam; Thereby reduce furnace temperature and displace oxygen, reach the stove purpose of going out.This invention stove method of going out is simple, only in the inlet channel of aperture, installs several shower nozzles and gets final product, and the steam that in stove, forms is not combustion-supporting not to burn, and makes furnace heat cement out no longer resume combustion fast, and makes water supply volume minimum, can not cause the permeable threat of mine.But this method shower nozzle is transferred process complicacy, poor operability.
Prior art four, patent 200910015542 " method for extinguishing underground gasification furnace with steam ", this method are at ground configuration steaming plant and steam pipeline; Steam pipeline is connected on the former inlet channel; In gasification furnace, charge into steam through inlet channel, steam is met the further gasification reaction of furnace high-temperature, puts out a fire thereby break off the interior oxygen of gasification furnace; Constantly charging into absorbing and cooling temperature in the process; Furnace heat is cemented out, discharge ground from the exhaust passage and lower the temperature, reach the purpose of the stove that fast and safely thoroughly goes out.This invention stove method of going out has realized thoroughly going out fast stove, and can not receive the purpose of permeable threat.But because the underground gasification coal seam is darker; In steam blasts the process of underground combustion dead zone, be cooled, the steam that causes getting into the combustion dead zone becomes water basically, and its cooling effect to the subregion is better; But the energy consumption of producing steam is bigger, so economy is all relatively poor relatively with the stove effect of going out.
Prior art five; Patent 200910015540 " method for comprehensively extinguishing underground gasification furnace "; This method at first adopts the steam stove that goes out flame-out; Carry out air cooling-down with atomized water spray then, adopt slip casting method at last, make underground gasification furnace and atmospheric isolation with all turnover gas passages of injecting paste material sealing underground gasification furnace.The stove method of comprehensively going out of this invention, faster than the single stove method of going out, limited and all be converted into steam and discharge because of water, can not cause the permeable threat of mine.But this procedure is complicated, and the ancillary service that needs is more, and operability also compares relatively poor.
Prior art six; Document " the ignition analysis of causes of crane coal five ore deposits 21 coal spontaneous and integrated control technique "; " utilize the gel retardant preventing and extinguishing fire technology to handle the down-hole height and emit a spontaneous combustionof coal "; " brief talk the application of the anti-fire extinguishing of gel in Coal Production " etc., introduced chemical gel to handle high temperature dot and leakage stopping technology, Roc and stop/the beautiful diffusing sealing technique of horse, preventing and extinguishing fire of coal mine agent MEA with build barrier material FSA fast and unite and press colliery underground fire district spontaneous combustion treatment measures such as annotating sealing technique.But these measures all are to the mine fire prevention and administer, and are difficult to be applicable to that underground gasification furnace puts out stove, can not realize basically.
Prior art seven; Patent US20050011653A1 " PROCESS FOR EXTINGUISHMENT OFUNDERGROUND COAL SEAM FIRES " proposes a kind of heat in underground fire district that utilizes own and heats lime stone slurry; Make slurries be heated and produce CO2, and then reach method for extinguishing fire.This method cost is lower, realizes also being easier to, the lime stone slurry fire extinguishing that this method adopts, and its large usage quantity though cost is not high, is difficult to fully contact with distances mouth fire district far away, is applicable to the fire extinguishing in underground fire among a small circle district.
Prior art eight; Patent US005909777A " METHOD AND APPARATUS FOR STOPPING THE SPREAD OF A FH2E IN AN UNDERGROUND MINE " propose a kind of under the colliery prefabricated removable water pipe and nozzle, the fire fighter is difficult to the problem that gets into when taking place to solve underground fire.This patent mainly is that because underground gasification furnace has been difficult to people's down-hole operation, therefore putting out the stove process at underground gasification does not possess feasibility basically to a kind of solution of the situation proposition of breaking out of fire in the Coal Production or the resume combustion of abandoned mine well.
Summary of the invention
The present invention is intended to overcome above-mentioned at least one defective of the prior art.
The present invention proposes a kind of underground coal gasification(UCG) and puts out the stove method, and it is in the later stage of underground gasification furnace life cycle, is utilized in to put out to add alkali metal hydrogencarbonate, ammonium phosphate salt etc. in the furnace gases and can meet heat and produce CO
2Etc. the chemical products of fire-retardant gas, reach the acceleration underground gasification furnace and put out the stove process, the purpose of stove time is put out in control.
The furnace gases of putting out here generally is to point to the gas that is used to put out stove that injects in the underground gasification furnace, for example steam, nitrogen, CO
2Deng can fire-retardant or not combustion-supporting gas.
According to an aspect of the present invention, propose a kind of underground coal gasification(UCG) and put out the stove method, may further comprise the steps: utilize original turnover air pipe of coal underground gasifying furnace in underground gasification furnace, to inject and put out furnace gases; Put out the process of furnace gases in injection, in putting out furnace gases, be added with the additive that helps put out stove.
According to one embodiment of present invention, said additive comprises alkali metal hydrogencarbonate, preferred sodium acid carbonate.
According to one embodiment of present invention, said additive comprises ammonium phosphate salt.
According to one embodiment of present invention, the step of interpolation additive comprises in putting out furnace gases: on original turnover air pipe of underground gasification furnace, the additive adding apparatus is set, through said additive adding apparatus additive is added in the said turnover air pipe.
According to one embodiment of present invention, in said additive adding apparatus, pressurized tank is set, puts out furnace gases and the process that adds additive in injection, the gas pressure in making pressurized tank is greater than the pressure that puts out furnace gases that injects through the turnover air pipe.
According to one embodiment of present invention, in said additive adding apparatus, agitator is set, is used for stirring the additive of additive adding apparatus.
According to one embodiment of present invention; The step of in putting out furnace gases, adding additive comprises: the house steward who is communicated with original turnover air pipe of underground gasification furnace is set; The additive pre-mixing apparatus is set in said house steward; To put out furnace gases and inject the additive pre-mixing apparatus, be pre-mixed, put out furnace gases and additive delivery is gone in the underground gasification furnace through each turnover air pipe with mixed respectively then with additive in the additive pre-mixing apparatus.
According to one embodiment of present invention, in gasification furnace, inject successively through a plurality of turnover air pipes and put out furnace gases and additive.
According to one embodiment of present invention, in gasification furnace, inject simultaneously through a plurality of turnover air pipes and put out furnace gases and additive.
Underground gasification of the present invention puts out the stove method, through adding additive, can quicken to put out the stove process, reduces and puts out the furnace gases consumption, practices thrift and puts out the furnace gases cost.And, can utilize original turnover air pipe, need not add too much complex apparatus, easy to implement.
Description of drawings
Fig. 1 shows the equipment of stove method is put out in enforcement according to the underground coal gasification(UCG) of the first embodiment of the present invention sketch map.
Fig. 2 shows the sketch map that the equipment of stove method is put out in enforcement underground coal gasification(UCG) according to a second embodiment of the present invention.
Fig. 3 shows the sketch map that the equipment of stove method is put out in the underground coal gasification(UCG) of implementing a third embodiment in accordance with the invention.
The specific embodiment
The present invention proposes a kind of technical scheme, realizes the quick or controlled stove that puts out to the underground coal gasification(UCG) process.Concrete implementation procedure is: utilize original turnover air pipe of coal underground gasifying furnace in underground gasification furnace, to inject to put out furnace gases (to be generally steam, nitrogen, CO
2Perhaps water smoke spray etc.); Put out the process of furnace gases in injection, in putting out furnace gases, be added with the additive that helps put out stove.
Additive for example can be met heat for alkali metal hydrogencarbonate, ammonium phosphate salt etc. and produced CO
2, H
2Fire-retardant or the chemical products of combustion-supporting gas not such as O.Alkali metal hydrogencarbonate, ammonium phosphate salt are fire retardant matter common in the fire extinguisher, and be nontoxic, so can not pollute underground water after getting into the combustion dead zone.Put out the process of furnace gases in injection, additive is carried in the underground gasification furnace, and the district contact with gasification furnace high-temperature fire, reaches the go out effect of stove of acceleration.And the powder of the alkali metal hydrogencarbonate of injection, ammonium phosphate salt etc. can be adsorbed on the surperficial perhaps fusion after coagulation in combustion dead zone and stop phreatic pouring in to a certain extent on the surface, closes few permeable threat.
The alkali metal hydrogencarbonate, the ammonium phosphate salt that add; Like sodium bicarbonate powder, modification sodium salt dry powder, ammonium dihydrogen phosphate (ADP) dry powder, diammonium hydrogen phosphate dry powder, phosphoric acid dry powder etc., mainly through the physics that under the carrying of putting out furnace gases, contacts, take place when mixing, chemical action fire extinguishing with flame.That is, the first, the volatility analyte of alkali metal hydrogencarbonate, ammonium phosphate salt etc. comprises water and carbon dioxide, the endothermic reaction takes place make the needed shortage of heat of burning, thereby suppress burning; The second, a large amount of carbon dioxide of generation reduces oxygen concentration and forces the burning interruption; The 3rd, the powder of alkali metal hydrogencarbonate, ammonium phosphate salt etc. is fallen on the combustible surface, and (270 ℃) form one deck covering layer after the high temperature action fusion, thus isolated oxygen apnea fire extinguishing.
Consider economy, the preferred sodium acid carbonate of additive, the furnace gases of putting out that is blasted by the turnover air pipe is preferably purity at the nitrogen more than 98%.
Below be chemistry and the physical action that example explanation additive is taken place in coal underground gasifying furnace with the sodium acid carbonate.
Sodium acid carbonate slowly decomposes 50 ℃ of beginnings, decomposes rapidly at 270 ℃, produces CO
2, water and sodium carbonate, reaction equation is:
2NaHCO
3＝＝Na
2CO
3+H
2O+CO
2
Wherein water and carbon dioxide can both with the carbon generation endothermic reaction in the coal, reduce fire district temperature, thereby suppress the burning of coal.The a large amount of carbon dioxide that produces reduces oxygen concentration and forces the burning interruption.The powder of sodium acid carbonate is fallen on the combustible surface, and after the high temperature action fusion, forms one deck covering layer, thus isolated oxygen apnea fire extinguishing.
Can be with CO2 as the major control index of putting out stove.Standard GB 50193-93 regulation, coal gas and natural gas fire extinguishing, gas concentration lwevel is 37%.With reference to this mark, detect gas component (being mainly nitrogen and carbon dioxide), can think to have reached basically greater than 37% when gas concentration lwevel and put out the stove purpose; Monitor the venthole gas temperature subsequently, when treating that Outlet Gas Temperature is reduced to below 90 ℃, explain that temperature is reduced to below the burning-point in the gasification furnace, put out the stove success.Sealing outlet then continues to blast the excessive furnace gases of putting out, and when treating that the gasification furnace internal pressure reaches 0.5MPa, airtight each air inlet/outlet puts out stove and accomplishes.
In the practice, the volume of the combustion dead zone in gasification later stage can estimate, thereby can obtain the amount of needed carbon dioxide, and then acquisition needs the amount of the sodium acid carbonate of feeding.In addition,, also can control, put out the stove controllable process thereby make to the time of putting out stove through the flow velocity of control feeding gas.
For example, suppose that counter to release combustion dead zone volume be 1000m through Coal-fired capacity in process for underground gasification latter stage
3, CO
2Concentration need reach about 40% just can reach fire extinguishing requirement, therefore calculating needs CO
2At least 400m
3, and then draw and need sodium acid carbonate 3000kg at least.Consider the loss problem, needing the amount of sodium acid carbonate need multiply by empirical coefficient 1.2 is 3600kg.
Rule of thumb, the stove later stage combustion dead zone of going out need keep about 0.5MPa, and promptly need blasting normal pressure nitrogen, to make volume be 1000m
3Combustion dead zone pressure reach 0.5MPa, the normal pressure nitrogen volume V that then need blast
Normal pressureCan solve by following method:
According to The Ideal-Gas Equation is carat imperial equation of a uncle (CO who ignores generation in this calculating
2): the pV=nRT conversion can draw:
P
Band is pressedV
The combustion dead zone=P
Normal pressureV
Normal pressure
Wherein: P
Normal pressureBe nitrogen pressure under the normal pressure;
P
Band is pressedFor firing the pressure that the dead zone need reach;
V
The combustion dead zoneBe combustion dead zone volume
That is: V
Normal pressure=(0.5 * 1000)/0.1=5000Nm
3
Mol ratio blasting the time suggestion nitrogen that goes out furnace gases and additive and sodium acid carbonate is 63: 74, for the increase stove speed of going out can suitably increase nitrogen flow rate and its ratio.
Below in conjunction with the object lesson explanation stove method of putting out of the present invention.
Embodiment 1
Fig. 1 shows the equipment of stove method is put out in enforcement according to the underground coal gasification(UCG) of the first embodiment of the present invention sketch map.
As shown in Figure 1, typical coal underground gasifying furnace comprises some turnover air pipes 1,2 and 3, coal seam 4 and the combustion dead zone 5 of the diverse location that is distributed in the gasification furnace zone.Turnover air pipe 1,2 and 3 extends to the coal seam 4 via stratum 21 from ground 20.In coal gasification processes, turnover air pipe 1,2 and 3 can be used separately as inlet channel, is used to feed the various gasifying agents that impel the coal combustion gasification; Or outlet passageway; Be used to discharge the gaseous product after coal combustion gasifies, or be used for other purpose, for example use passage as observation.Though 3 turnover air pipes have been shown among Fig. 1, and the quantity of turnover air pipe can be for more a plurality of.
In gasification, the combustion dead zone 5 that in the coal seam, forms gradually along with burning of coal is communicated with turnover air pipe 1,2 and 3 respectively.In underground coal gasification(UCG) process latter stage, along with continuing of gasifier operation time, combustion dead zone 5 enlarges; The intensity of gasification descends in the underground gasification furnace, and calorific value of gas reduces, and the gasification controllability dies down; At this moment represent that this underground gasification furnace has been bordering on the latter stage of gasifier operation, need put out stove to it and handle, to guarantee that subterranean coal does not burn away; Save resource, also help stablizing of pollutant and stratum in the underground environment.
In order to realize putting out stove, as shown in Figure 1, on former turnover air pipe 1-3, additive adding apparatus 6 is set.When beginning to put out stove, inject in underground gasification furnace through turnover air pipe 1-3 and to put out furnace gases; Put out the process of furnace gases in injection, through additive adding apparatus 6 additive 8 is added inlet 9 through additive and inject turnover air pipe 1-3.Thereby additive 8 is put out, and furnace gases is carried and through in the combustion dead zone 5 that passes in and out air pipe 1-3 injection gasification furnace, be used to put out stove.
Additive 8 can be for being Powdered carbonic acid hydrogen sodium, puts out furnace gases and can be nitrogen through what turnover air pipe 1-3 injected.It has been generally acknowledged that CO
2It is obvious that concentration reaches about 40% fire extinguishing effects, and the molar ratio that can calculate nitrogen and sodium acid carbonate as previously mentioned is approximately 63: 74.Because control furnace pressure, nitrogen is excessive.
Alternatively, as shown in Figure 1, can above this additive adding apparatus 6, pressurized tank 7 be set, inject gas-pressurized through the top of the additive 8 of pressurized tank 7 in additive adding apparatus 6.Thereby; Through making gas pressure in the pressurized tank 7 greater than the pressure that puts out furnace gases that injects through turnover air pipe 1-3; Make the furnace gases of injecting through turnover air pipe 1-3 of putting out be easy to additive 8 is carried in the combustion dead zone 5 of gasification furnace, reach the purpose of putting out stove.
Illustrated among Fig. 1 in three turnover air pipe 1-3 and be respectively arranged with additive adding apparatus 6.Therefore, in putting out the stove process, can in gasification furnace, inject successively at interval by certain hour through 3 turnover air pipes 1,2,3 and put out furnace gases and additive, and can cycle operation; Perhaps, also can in gasification furnace, inject simultaneously and put out furnace gases and additive, to quicken to put out stove through 3 turnover air pipes 1,2,3.For this reason, can pass in and out in the air pipe 1,2,3 at each control valve is set, put out the injection of furnace gases and additive with control.Certainly, additive adding apparatus 6 also can only be arranged on 1 or any a plurality of turnover air pipe.
After furnace gases and additive and certain time were put out in injection as stated, the temperature of monitoring gasification furnace venthole exit gas when treating that Outlet Gas Temperature is reduced to below 90 ℃, explained that temperature is reduced to below the burning-point in the gasification furnace, puts out the stove success.Sealing outlet then continues to blast the excessive furnace gases of putting out, and when treating that the gasification furnace internal pressure reaches 0.5MPa, airtight each air inlet/outlet puts out stove and accomplishes.Here, the measurement of temperature and pressure can utilize original temperature measuring equipment of gasification furnace and device for pressure measurement.
The additive adding apparatus of embodiment 1 is simpler, drops into less, easy to implement.
Fig. 2 shows the sketch map that the equipment of stove method is put out in enforcement underground coal gasification(UCG) according to a second embodiment of the present invention.
The others of embodiment 2 are identical with embodiment 1, repeat no more here.
Embodiment 3
Fig. 3 shows the sketch map that the equipment of stove method is put out in the underground coal gasification(UCG) of implementing a third embodiment in accordance with the invention.
The stove process of putting out and the embodiment 1 and 2 of embodiment 3 are basic identical.Difference is, and is as shown in Figure 3, replaces the additive adding apparatus 6 of embodiment 1 and 2; According to embodiment 3; The house steward 18 who is communicated with original turnover air pipe 1,2,3 of underground gasification furnace is set, in said house steward 18, additive pre-mixing apparatus 16 is set, will put out furnace gases and inject additive pre-mixing apparatus 16; Be pre-mixed with the additive in the additive pre-mixing apparatus 16, then mixed furnace gases and the additive of putting out be conveyed in the underground gasification furnace through turnover air pipe 1,2,3 respectively.
Particularly; At first put out furnace gases when putting out stove and get into additive pre-mixing apparatus 16 from putting out furnace gases import 12; In additive pre-mixing apparatus 16, furnace gases will be put out and additive mixes; The furnace gases of putting out of mixing gets into respectively in the turnover air pipe 1,2,3 with additive, and the combustion dead zone 5 through turnover air pipe 1,2,3 injection gasification furnaces is used to put out stove.
Alternatively, can pass in and out in the air pipe 1,2,3 at each control valve 14 is set, thereby put out furnace gases and the additive that can control mixing get into turnover air pipe 1,2,3 successively or get into turnover air pipe 1,2,3 simultaneously.
According to embodiment 3, only need a pre-mixing apparatus, it is simple relatively to put out furnace apparatus.
The others of embodiment 3 are identical with the 1st and the 2nd embodiment, repeat no more here.
As stated; The present invention provides through a kind of underground coal gasification(UCG) simple, easy to implement relatively and puts out the stove method; Through in putting out the stove process, getting into and add an amount of additive (alkali metal hydrogencarbonate, ammonium phosphate salt etc.) when underground putting out furnace gases; Make that putting out the stove process quickens, and puts out the purpose of stove time thereby reach control.And the stove method of putting out of the present invention can not pollute underground, and cost is relatively low.
Some exemplary embodiments of the present invention more than have been described, have been it will be apparent to one skilled in the art that under the situation that does not depart from principle of the present invention and essence, can carry out various changes embodiment.Protection scope of the present invention is defined by the claims.
Claims (10)
1. the stove method is put out in a underground coal gasification(UCG), may further comprise the steps:
Utilize original turnover air pipe of coal underground gasifying furnace in underground gasification furnace, to inject and put out furnace gases;
Put out the process of furnace gases in injection, in putting out furnace gases, be added with the additive that helps put out stove.
2. coal underground gasifying furnace according to claim 1 puts out the stove method, and wherein, said additive comprises alkali metal hydrogencarbonate.
3. coal underground gasifying furnace according to claim 1 puts out the stove method, and wherein, said additive comprises ammonium phosphate salt.
4. coal underground gasifying furnace according to claim 1 puts out the stove method, and wherein, said additive comprises sodium acid carbonate.
5. coal underground gasifying furnace according to claim 1 puts out the stove method; Wherein, The step of in putting out furnace gases, adding additive comprises: on original turnover air pipe of underground gasification furnace, the additive adding apparatus is set, through said additive adding apparatus additive is added in the said turnover air pipe.
6. coal underground gasifying furnace according to claim 5 puts out the stove method; Wherein, In said additive adding apparatus, pressurized tank is set, puts out furnace gases and the process that adds additive, make gas pressure in the pressurized tank greater than the pressure that puts out furnace gases that injects through the turnover air pipe in injection.
7. coal underground gasifying furnace according to claim 6 puts out the stove method, wherein, in said additive adding apparatus, agitator is set, and is used for stirring the additive of additive adding apparatus.
8. coal underground gasifying furnace according to claim 1 puts out the stove method; Wherein, The step of in putting out furnace gases, adding additive comprises: the house steward who is communicated with original turnover air pipe of underground gasification furnace is set; The additive pre-mixing apparatus is set in said house steward, will puts out furnace gases and inject the additive pre-mixing apparatus and be pre-mixed, put out furnace gases and additive delivery is gone in the underground gasification furnace through each turnover air pipe with mixed respectively then with additive with the additive pre-mixing apparatus.
9. put out the stove method according to each described coal underground gasifying furnace among the claim 1-8, wherein, in gasification furnace, inject successively through a plurality of turnover air pipes and to put out furnace gases and additive.
10. put out the stove method according to each described coal underground gasifying furnace among the claim 1-8, wherein, in gasification furnace, inject simultaneously through a plurality of turnover air pipes and to put out furnace gases and additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102605743A CN102748002A (en) | 2012-07-26 | 2012-07-26 | Method for extinguishing underground gasification furnace of coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102605743A CN102748002A (en) | 2012-07-26 | 2012-07-26 | Method for extinguishing underground gasification furnace of coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102748002A true CN102748002A (en) | 2012-10-24 |
Family
ID=47028457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102605743A Pending CN102748002A (en) | 2012-07-26 | 2012-07-26 | Method for extinguishing underground gasification furnace of coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102748002A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522914A (en) * | 2016-11-18 | 2017-03-22 | 中为（上海）化学有限公司 | Underground gasifier quenching and burnt-out area restoration treatment method for coal underground gasification process |
| CN107083946A (en) * | 2017-06-12 | 2017-08-22 | 新疆国利衡清洁能源科技有限公司 | Method for extinguishing underground coal gasification furnace |
| CN107269256A (en) * | 2017-08-07 | 2017-10-20 | 新疆国利衡清洁能源科技有限公司 | Wellhead assembly is filled in underground coal gasification(UCG) |
| CN107313806A (en) * | 2017-08-09 | 2017-11-03 | 新疆国利衡清洁能源科技有限公司 | A kind of underground coal gasification combustion space area backfill system and earth-filling method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5909777A (en) * | 1996-11-12 | 1999-06-08 | Jamison Family Trust | Method and apparatus for stopping the spread of a fire in an underground mine |
| US20050011653A1 (en) * | 2003-07-16 | 2005-01-20 | Strabala William M. | Process for extinguishment of underground coal seam fires |
| CN101382063A (en) * | 2008-09-04 | 2009-03-11 | 新奥气化采煤有限公司 | Novel underground coal gasification furnace |
| CN101417166A (en) * | 2008-11-14 | 2009-04-29 | 中国科学技术大学 | Gas-solid composite powder base fire-extinguishing agent and preparation method thereof |
| CN101581211A (en) * | 2009-05-15 | 2009-11-18 | 莫技 | Method for comprehensively extinguishing underground gasification furnace |
-
2012
- 2012-07-26 CN CN2012102605743A patent/CN102748002A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5909777A (en) * | 1996-11-12 | 1999-06-08 | Jamison Family Trust | Method and apparatus for stopping the spread of a fire in an underground mine |
| US20050011653A1 (en) * | 2003-07-16 | 2005-01-20 | Strabala William M. | Process for extinguishment of underground coal seam fires |
| CN101382063A (en) * | 2008-09-04 | 2009-03-11 | 新奥气化采煤有限公司 | Novel underground coal gasification furnace |
| CN101417166A (en) * | 2008-11-14 | 2009-04-29 | 中国科学技术大学 | Gas-solid composite powder base fire-extinguishing agent and preparation method thereof |
| CN101581211A (en) * | 2009-05-15 | 2009-11-18 | 莫技 | Method for comprehensively extinguishing underground gasification furnace |
Non-Patent Citations (1)
| Title |
|---|
| 吴颐伦: "干粉灭火剂配方一般原理", 《消防技术与产品消息》, no. 2, 10 February 2000 (2000-02-10) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522914A (en) * | 2016-11-18 | 2017-03-22 | 中为（上海）化学有限公司 | Underground gasifier quenching and burnt-out area restoration treatment method for coal underground gasification process |
| CN106522914B (en) * | 2016-11-18 | 2019-02-12 | 中为（上海）化学有限公司 | Underground gasification furnace parking and burned out area restoration processing method for coal underground gasifying technology |
| CN107083946A (en) * | 2017-06-12 | 2017-08-22 | 新疆国利衡清洁能源科技有限公司 | Method for extinguishing underground coal gasification furnace |
| CN107269256A (en) * | 2017-08-07 | 2017-10-20 | 新疆国利衡清洁能源科技有限公司 | Wellhead assembly is filled in underground coal gasification(UCG) |
| CN107313806A (en) * | 2017-08-09 | 2017-11-03 | 新疆国利衡清洁能源科技有限公司 | A kind of underground coal gasification combustion space area backfill system and earth-filling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103742121B (en) | underground gasification gas injection device and method | |
| CN103670338B (en) | A kind of coal bed gas and coal mining method altogether | |
| CN102500077B (en) | Waste dump extinguishing method | |
| CN101993574B (en) | Fireproof high-molecular compound colloid material for coal mines | |
| CN103422848B (en) | Underground coal gasification method and grouting device | |
| US20150247394A1 (en) | Method for fracture communication, passage processing, and underground gasification of underground carbon-containing organic mineral reservoir | |
| CN102828767A (en) | Gob natural fire control method | |
| CN101586915B (en) | Gasification furnace for the gasification pilot plant test of underground coal and process thereof | |
| CN102587883B (en) | Method for quenching underground coal gasifier | |
| CN112377237B (en) | Fully-surrounding fire extinguishing treatment method for smoldering fire area of coal gangue yard | |
| CN102748002A (en) | Method for extinguishing underground gasification furnace of coal | |
| CN112943343B (en) | Efficient and rapid fire extinguishing method for ground drilling of different types of fires in coal mine goaf | |
| CN207960662U (en) | A kind of carbon dioxide injection mine goaf system | |
| CN102486085A (en) | Gasifying agent transmission and distribution system and technology for underground gasification of carbon-containing organic matters | |
| CN104053793B (en) | Remove the device and method of the unburned sedimentary of Blast Furnace Raceway | |
| WO2018225052A1 (en) | Method for energy recovery through combustion in-situ of solid fuel | |
| Wang et al. | Semi‐industrial tests on enhanced underground coal gasification at Zhong‐Liang‐Shan coal mine | |
| CN112196505A (en) | Oil reservoir in-situ conversion hydrogen production system and hydrogen production process thereof | |
| CN101825279A (en) | Method for achieving water-injecting high-pressure combustion through pipeline of fuel nozzle | |
| RU2385411C1 (en) | Underground gas generator | |
| CN217330285U (en) | Power coal underground in-situ L-shaped gas supply combustion, L-shaped heat production and carbon sequestration system | |
| CN106823230B (en) | Red mud-based fire extinguishing and spontaneous combustion preventing material suitable for spontaneous combustion of coal gangue | |
| CN110821544A (en) | Self-ignition coal hole coal bed gasification furnace type mining area in mine | |
| CN207194879U (en) | A kind of underground coal gasification(UCG) deep hole ignition system | |
| CN106609677A (en) | A gas extraction and discharge construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121024 |