CN104912585A - Liquid nitrogen system and method for nondestructively governing fire area in coal field - Google Patents
Liquid nitrogen system and method for nondestructively governing fire area in coal field Download PDFInfo
- Publication number
- CN104912585A CN104912585A CN201510262390.4A CN201510262390A CN104912585A CN 104912585 A CN104912585 A CN 104912585A CN 201510262390 A CN201510262390 A CN 201510262390A CN 104912585 A CN104912585 A CN 104912585A
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- China
- Prior art keywords
- liquid nitrogen
- air
- coal
- booster pump
- fire
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
Abstract
The invention discloses a liquid nitrogen system and a method for nondestructively governing a fire area in a coal field. An air filter (1), an air compressor (2), an air cooler (3), an oil-water separator (4), an air drying purifier (5), an air separation tower (6), a liquid nitrogen storage slot (7) and a booster pump (8) are sequentially connected by a pipeline; a liquid nitrogen tank car (9) and an access end of a surface borehole (10) are connected with an output end of the booster pump (8); a bottom surface borehole (10) and a geothermal well (12) are positioned in the fire area in the coal field; and geothermal power generation equipment (11) generates power to supply to the equipment by virtue of high-temperature steam provided by a geothermal well (12). According to the liquid nitrogen system and the method disclosed by the invention, waste heat energy generated by the fire area in the coal field is utilized to carry out geothermal power generation, so that energy waste is reduced; a liquid nitrogen fire preventing and extinguishing technology is adopted to govern coal field fire, so that cooling and inerting are quickly carried out on the fire area; the liquid nitrogen is from nitrogen gas in air, and quickly returned into air for being recycled for preparing liquid nitrogen, so that not only is environmental destruction not caused, but also cycling and reutilization of resources are realized.
Description
Technical field
The present invention relates to a kind of liquid nitrogen system and method for harmless improvement coal-field fire, belong to colliery safety-security area.
Background technology
Coal is the main body energy of China, and energy security is related to the lifeblood of national stability and development.But China threatens maximum country by underground coal fire, the ground fire of China is classified as by American Media one of " the large continuation disaster in the world 5 ", and the coal that spontaneous combustion coal fire is burnt every year is equivalent to 20% of the whole energy-consuming of the U.S..The sixties in 20th century, the underground coal fire in the Inner Mongol still annoying China so far, and this coal fire about consumes 2,000 ten thousand tons of coal resources every year, exceedes German annual coal output.And underground coal fire also can threaten mining safety, wastes a large amount of heat resources, heavy damage ecological environment.
Coal-field fire fire-fighting technique main both at home and abroad has direct stripping method, water filling/slurry processes, gel-filled/foam method etc.Direct stripping method, directly exactly peels off by mechanical means, digs out fiery point, and this methods engineering amount is huge, takes time and effort, and destroys surface environment; Fire extinguishing of pouring water/starch is by a certain amount of mud of drill-pouring and water, can play starvation, reduce coal seam temperature, thus reach the object stoping the further oxidation and spontaneous combustion of coal.But because accurately cannot locate flame range high temperature dot position, and slurry range of scatter is limited, poor effect of therefore pouring water/starch; Gel and foam have certain mobility, better to goaf coal spontaneous combustion effect, but cost is higher, once bubble burst, flameproof effect can be had a greatly reduced quality.
Summary of the invention
The object of this invention is to provide a kind of liquid nitrogen system and method for harmless improvement coal-field fire, in the efficient prevention and control avoiding realizing under the prerequisite destroying ecological environment coal-field fire.
For achieving the above object, the technical solution used in the present invention is:
A kind of liquid nitrogen system of harmless improvement coal-field fire, comprise air filter, air compressor, air cooler, oil water separator, air dry purifier, air separation column, liquid nitrogen storage, booster pump, liquid nitrogen tank car, surface drilling, geothermal power generating device and geothermal well, described air filter, air compressor, air cooler, oil water separator, air dry purifier, air separation column, liquid nitrogen storage, booster pump is linked in sequence by pipeline, liquid nitrogen tank car is connected with supercharging delivery side of pump with the incoming end of surface drilling, described bottom surface boring is positioned at coal-field fire, described geothermal well is positioned at coal-field fire, the high-temperature steam generating that geothermal power generating device is provided by geothermal well, the power output end of described geothermal power generating device connects air compressor respectively, air cooler, oil water separator, air dry purifier, air separation column, the power input end of liquid nitrogen storage and booster pump.
Further, the underground geographical environment different according to flame range and different flame range features, the type of described surface drilling includes vertical drilling, inclined drill and curve drilling.
Further, in order to improve the coupling between pressurized effect and equipment, described booster pump is large discharge reciprocating cryogenic liquid pump, boost range 0 ~ 10Mpa.
Further, in order to avoid prevention and control underground fire and geothermal energy extract between interference, the distance between described geothermal well and surface drilling is greater than 50 meters.
A method for harmless improvement coal-field fire, comprises the following steps:
A. the high-temperature steam taken out from geothermal well drives geothermal power generating device, is air compressor, air cooler, oil water separator, air dry purifier, air separation column, liquid nitrogen storage and booster pump supply electric energy;
B. the air in air is through air filter dust out and mechanical admixture, then enter air compressor and be compressed to required pressure, send into air cooler and reduce air themperature, enter oil water separator and air dry purifier again, moisture, carbon dioxide, acetylene and other hydrocarbons in removing air, complete compression and the purification of air;
C. the air after purification enters air separation column, and complete air separation, obtain liquid nitrogen, the liquid nitrogen produced is stored in liquid nitrogen storage by liquid nitrogen carrier pipe;
D., after the liquid nitrogen in liquid nitrogen storage is transported to assigned address by Cryo Heat Insulation pipe after booster pump supercharging, the surface drilling of coal-field fire is injected by note liquid nitrogen pipe;
E. unnecessary liquid nitrogen loads liquid nitrogen tank car by Cryo Heat Insulation pipe, is transported to place to use, coalfield and injects flame range by force feed equipment.
Compared with prior art, technical scheme provided by the invention is on-the-spot at the coal-field fire that arid is severe, apply the fire extinguishing characteristic of the heavily gas subsidence effect of liquid nitrogen, steam atomization effect, expansion drive oxygen effect, air in air is produced liquid nitrogen through overcompression purification, air separation, direct injection surface drilling, or load liquid nitrogen tank car, be fixed or movable high-efficiency cooling and fire extinguishing, the destruction of avoid huge excavation to peel off engineering causes a large amount of human and material resources, financial resources consumption and ecological environment; Liquid nitrogen range of scatter is large, and total flooding covers, and grouting draws ditch advantage remarkable relatively, and in liquid nitrogen producing process, water supply volume is less, is particularly suitable for the fire extinguishing engineering of arid or semiarid zone; The waste heat utilizing coal-field fire to produce carries out geothermal power generation, reduces energy waste; Adopt liquid nitrogen preventing and extinguishing fire technology to administer Coal Fire Fields, fast cooling, inerting flame range, realize the effect of high-effect fire-extinguishing, and liquid nitrogen is derived from the nitrogen in air, comes back to air, recycles and produces liquid nitrogen, both can not cause environmental disruption, realize again the cycling and reutilization of resource.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure: 1, air filter, 2, air compressor, 3, air cooler, 4, oil water separator, 5, air dry purifier, 6, air separation column, 7, liquid nitrogen storage, 8, booster pump, 9, liquid nitrogen tank car, 10, surface drilling, 11, geothermal power generating device, 12, geothermal well.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, a kind of liquid nitrogen system of harmless improvement coal-field fire, comprises air filter 1, air compressor 2, air cooler 3, oil water separator 4, air dry purifier 5, air separation column 6, liquid nitrogen storage 7, booster pump 8, liquid nitrogen tank car 9, surface drilling 10, geothermal power generating device 11 and geothermal well 12, described air filter 1, air compressor 2, air cooler 3, oil water separator 4, air dry purifier 5, air separation column 6, liquid nitrogen storage 7, booster pump 8 is linked in sequence by pipeline, liquid nitrogen tank car 9 is connected with supercharging delivery side of pump with the incoming end of surface drilling 10, described bottom surface boring 10 is positioned at coal-field fire, described geothermal well 12 is positioned at coal-field fire, the high-temperature steam generating that geothermal power generating device 11 is provided by geothermal well 12, the power output end of described geothermal power generating device 11 connects air compressor 2 respectively, air cooler 3, oil water separator 4, air dry purifier 5, air separation column 6, the power input end of liquid nitrogen storage 7 and booster pump 8.Described geothermal power generating device 11 comprises decontaminating separator, steam turbine, generator.From the high-temperature steam that geothermal well 12 takes out, through decontaminating separator, remove the various impurity that down-hole is brought, clean Steam Actuation steam turbine acting, and make electrical power generators.
Further, the underground geographical environment different according to flame range and different flame range features, the type of described surface drilling 14 includes vertical drilling, inclined drill and curve drilling.
Further, in order to improve the coupling between pressurized effect and equipment, described booster pump 9 is large discharge reciprocating cryogenic liquid pumps, boost range 0 ~ 10Mpa.
Further, in order to avoid prevention and control underground fire and geothermal energy extract between interference, the distance between described geothermal well 12 and surface drilling 10 is greater than 50 meters.
A method for harmless improvement coal-field fire, comprises the following steps:
A. the high-temperature steam taken out from geothermal well 12 drives geothermal power generating device 11, for electric energy supplied by air compressor 2, air cooler 3, oil water separator 4, air dry purifier 5, air separation column 6, liquid nitrogen storage 7 and booster pump 8;
B. the air in air is through air filter 1 dust out and mechanical admixture, then enter air compressor 2 and be compressed to required pressure, send into air cooler 3 and reduce air themperature, enter oil water separator 4 and air dry purifier 5 again, moisture, carbon dioxide, acetylene and other hydrocarbons in removing air, complete compression and the purification of air;
C. the air after purification enters air separation column 6, and complete air separation, obtain liquid nitrogen, the liquid nitrogen produced is stored in liquid nitrogen storage 7 by liquid nitrogen carrier pipe;
D., after the liquid nitrogen in liquid nitrogen storage 7 is transported to assigned address by Cryo Heat Insulation pipe after booster pump 8 supercharging, the surface drilling 10 of coal-field fire is injected by note liquid nitrogen pipe;
E. unnecessary liquid nitrogen loads liquid nitrogen tank car 9 by Cryo Heat Insulation pipe, is transported to place to use, coalfield and injects flame range by force feed equipment.
The design scheme that the present invention proposes is on-the-spot at severe coal-field fire, air in air is produced liquid nitrogen through overcompression purification, air separation, direct injection surface drilling, or load liquid nitrogen tank car, be fixed or movable high-efficiency cooling and fire extinguishing, the destruction of avoid huge excavation to peel off engineering causes a large amount of human and material resources, financial resources consumption and ecological environment; In liquid nitrogen producing process, water supply volume is less, is particularly suitable for the fire extinguishing engineering of arid or semiarid zone; The waste heat utilizing coal-field fire to produce carries out geothermal power generation, reduces energy waste; Adopt liquid nitrogen preventing and extinguishing fire technology to administer Coal Fire Fields, fast cooling, inerting flame range, realize the effect of high-effect fire-extinguishing, and liquid nitrogen is derived from the nitrogen in air, comes back to air, recycles and produces liquid nitrogen, both can not cause environmental disruption, realize again the cycling and reutilization of resource.
Claims (5)
1. the harmless liquid nitrogen system administering coal-field fire, is characterized in that, comprise air filter (1), air compressor (2), air cooler (3), oil water separator (4), air dry purifier (5), air separation column (6), liquid nitrogen storage (7), booster pump (8), liquid nitrogen tank car (9), surface drilling (10), geothermal power generating device (11) and geothermal well (12), described air filter (1), air compressor (2), air cooler (3), oil water separator (4), air dry purifier (5), air separation column (6), liquid nitrogen storage (7), booster pump (8) is linked in sequence by pipeline, liquid nitrogen tank car (9) is connected with the output of booster pump (8) with the incoming end of surface drilling (10), described bottom surface boring (10) is positioned at coal-field fire, described geothermal well (12) is positioned at coal-field fire, the high-temperature steam generating that geothermal power generating device (11) is provided by geothermal well (12), the power output end of described geothermal power generating device (11) connects air compressor (2) respectively, air cooler (3), oil water separator (4), air dry purifier (5), air separation column (6), the power input end of liquid nitrogen storage (7) and booster pump (8).
2. the liquid nitrogen system of a kind of harmless improvement coal-field fire according to claim 1, it is characterized in that, the type of described surface drilling (10) includes vertical drilling, inclined drill and curve drilling.
3. the liquid nitrogen system of a kind of harmless improvement coal-field fire according to claim 1, it is characterized in that, described booster pump (8) is large discharge reciprocating cryogenic liquid pump, boost range 0 ~ 10MPa.
4. the liquid nitrogen system of a kind of harmless improvement coal-field fire according to claim 1, it is characterized in that, the distance between described geothermal well (12) and surface drilling (10) is greater than 50 meters.
5. a harmless method of administering coal-field fire, is characterized in that, comprise the following steps:
A. the high-temperature steam taken out from geothermal well (12) drives geothermal power generating device (11), is air compressor (2), air cooler (3), oil water separator (4), air dry purifier (5), air separation column (6), liquid nitrogen storage (7) and booster pump (8) supply electric energy;
B. the air in air is through air filter (1) dust out and mechanical admixture, then enter air compressor (2) and be compressed to required pressure, send into air cooler (3) and reduce air themperature, enter oil water separator (4) and air dry purifier (5) again, moisture, carbon dioxide, acetylene and other hydrocarbons in removing air, complete compression and the purification of air;
C. the air after purification enters air separation column (6), and complete air separation, obtain liquid nitrogen, the liquid nitrogen produced is stored in liquid nitrogen storage (7) by liquid nitrogen carrier pipe;
D., after the liquid nitrogen in liquid nitrogen storage (7) is transported to assigned address by Cryo Heat Insulation pipe after booster pump (8) supercharging, the surface drilling (10) of coal-field fire is injected by note liquid nitrogen pipe;
E. unnecessary liquid nitrogen loads liquid nitrogen tank car (9) by Cryo Heat Insulation pipe, is transported to place to use, coalfield and injects flame range by force feed equipment.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510262390.4A CN104912585B (en) | 2015-05-21 | 2015-05-21 | A kind of lossless liquid nitrogen system and method for administering coal-field fire |
| PCT/CN2015/089592 WO2016183974A1 (en) | 2015-05-21 | 2015-09-15 | Liquid nitrogen system and method for nondestructively controlling fire area in coalfield |
| ZA201604619A ZA201604619B (en) | 2015-05-21 | 2016-07-06 | A liquid nitrogen system and method to govern fire district in coal field losslessly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510262390.4A CN104912585B (en) | 2015-05-21 | 2015-05-21 | A kind of lossless liquid nitrogen system and method for administering coal-field fire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104912585A true CN104912585A (en) | 2015-09-16 |
| CN104912585B CN104912585B (en) | 2017-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510262390.4A Active CN104912585B (en) | 2015-05-21 | 2015-05-21 | A kind of lossless liquid nitrogen system and method for administering coal-field fire |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104912585B (en) |
| WO (1) | WO2016183974A1 (en) |
| ZA (1) | ZA201604619B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298569A (en) * | 2015-10-12 | 2016-02-03 | 中国矿业大学 | Extracting and converting method for heat energy in coal field fire zone |
| CN105464696A (en) * | 2015-12-25 | 2016-04-06 | 神华集团有限责任公司 | Liquid-nitrogen pressurizing fireproofing and fire extinguishing system and method |
| CN106247168A (en) * | 2016-09-08 | 2016-12-21 | 西安科技大学 | The conveyer device of surface drilling fire extinguishing liquid carbon dioxide and carrying method |
| CN106523918A (en) * | 2016-11-30 | 2017-03-22 | 成都叮当自动化设备有限公司 | Recovery device for liquid nitrogen |
| CN106764439A (en) * | 2016-11-30 | 2017-05-31 | 成都叮当自动化设备有限公司 | Vacuum recovering apparatus prepared by a kind of liquid nitrogen |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
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| CN110030028B (en) * | 2018-10-08 | 2021-01-26 | 江苏信创安全技术研究院有限公司 | Intelligent water injection cooling efficient water-saving system and method for coal fire treatment |
| CN110777841A (en) * | 2019-11-28 | 2020-02-11 | 中冶京诚工程技术有限公司 | Foundation structure of air separation tower |
| CN114046172B (en) * | 2021-10-27 | 2023-07-14 | 中国长江三峡集团有限公司 | System and method for treating and utilizing coal fire based on carbon dioxide process and modularized design |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298569A (en) * | 2015-10-12 | 2016-02-03 | 中国矿业大学 | Extracting and converting method for heat energy in coal field fire zone |
| CN105464696A (en) * | 2015-12-25 | 2016-04-06 | 神华集团有限责任公司 | Liquid-nitrogen pressurizing fireproofing and fire extinguishing system and method |
| CN105464696B (en) * | 2015-12-25 | 2018-07-06 | 神华集团有限责任公司 | Liquid nitrogen is pressurized fireproof fire-extinguishing system and method |
| CN106247168A (en) * | 2016-09-08 | 2016-12-21 | 西安科技大学 | The conveyer device of surface drilling fire extinguishing liquid carbon dioxide and carrying method |
| CN106247168B (en) * | 2016-09-08 | 2018-07-17 | 西安科技大学 | The conveying device and carrying method of surface drilling fire extinguishing liquid carbon dioxide |
| CN106523918A (en) * | 2016-11-30 | 2017-03-22 | 成都叮当自动化设备有限公司 | Recovery device for liquid nitrogen |
| CN106764439A (en) * | 2016-11-30 | 2017-05-31 | 成都叮当自动化设备有限公司 | Vacuum recovering apparatus prepared by a kind of liquid nitrogen |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA201604619B (en) | 2019-10-30 |
| WO2016183974A1 (en) | 2016-11-24 |
| CN104912585B (en) | 2017-11-10 |
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