CN102562124B - Underground liquid nitrogen direct injection type fire preventing and extinguishing device - Google Patents
Underground liquid nitrogen direct injection type fire preventing and extinguishing device Download PDFInfo
- Publication number
- CN102562124B CN102562124B CN2012100268764A CN201210026876A CN102562124B CN 102562124 B CN102562124 B CN 102562124B CN 2012100268764 A CN2012100268764 A CN 2012100268764A CN 201210026876 A CN201210026876 A CN 201210026876A CN 102562124 B CN102562124 B CN 102562124B
- Authority
- CN
- China
- Prior art keywords
- liquid nitrogen
- control valve
- surge tank
- liquid
- tank
- 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.)
- Active
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 254
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 127
- 239000007788 liquid Substances 0.000 title claims abstract description 115
- 238000002347 injection Methods 0.000 title claims abstract description 17
- 239000007924 injection Substances 0.000 title claims abstract description 17
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 238000010992 reflux Methods 0.000 claims description 11
- 239000011810 insulating material Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 abstract description 9
- 230000002269 spontaneous effect Effects 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 3
- 230000003139 buffering effect Effects 0.000 abstract 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002631 hypothermal effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an underground liquid nitrogen direct injection type fire preventing and extinguishing device. The upper end of a liquid nitrogen tank of the device is connected with a liquid inlet control valve, a buffering tank is connected with the upper end of the liquid nitrogen tank via a buffering tank nitrogen outlet control valve, an upper one-way valve, a nitrogen return pipe and a liquid nitrogen tank nitrogen inlet control valve sequentially, the lower end of the liquid nitrogen tank is connected with the lower end of the buffering tank via a liquid nitrogen tank liquid outlet control valve, a lower one-way valve, a heat-insulation tube and a buffering tank liquid inlet control valve sequentially, and the lower end of the buffering tank is connected with a drilling tube via a hopper-shaped gathering opening and a buffering tank liquid outlet control valve. By the aid of the device, fire extinguishing efficiency can be improved by 30% at least, fire district treatment time is shortened by 20% at least, the device can be dragged by a mine underground rail vehicle to reach a closed wall to movably extinguish fire, and accordingly the underground liquid nitrogen direct injection type fire preventing and extinguishing device is flexible, convenient, safe and environment-friendly, is rapid in fire extinguishment, and is particularly applicable to high-efficiently preventing and controlling coal seam spontaneous fire hazards.
Description
Technical field
The present invention relates to the anti-extinguishing device of liquid nitrogen direct-filling type under a kind of coal mine.
Background technology
During mine fire catastrophe, because the mine buried depth is large, while not possessing surface drilling perfusion liquid nitrogen conditioned disjunction person due to surface drilling high in cost of production effects limit, mine often adopts down-hole direct injection type liquid nitrogen preventing and extinguishing fire technology.The underground liquid nitrogen direct injection type extinguishing device is mainly to be transported to down-hole by trackless rubber tire liquid nitrogen tank car or liquid nitrogen sub-packing pot, pass through pipeline, directly in injection hole, but in annotating the nitrogen process, along with the minimizing of liquid nitrogen in tank arrangement, being short of power of fluid injection nitrogen, and part liquid nitrogen is vaporized in annotating the nitrogen pipeline, can produce the vent plug phenomenon, affect the charging efficiency of liquid nitrogen.The weak point exposed in putting into practice at the scene for the anti-extinguishing device of these fluid injection nitrogen, study the anti-extinguishing device of suitable underground liquid nitrogen direct injection type most important.List of references: the Mei Yansuo self-sufficient and strategically located region, Chongqing mineral bureau liquid nitrogen extinguishment test group. liquid nitrogen puts out simulated fire test [J]. mining safety and environmental protection .1984(4): 1-10.Wang Deming. mine fire [M]. Xuzhou: publishing house of China Mining University, 2008:198.
Summary of the invention
For the liquid nitrogen that overcomes existing trackless rubber tire liquid nitrogen tank car or liquid nitrogen sub-packing pot is vaporized in annotating the nitrogen pipeline, can produce the vent plug phenomenon, affect the defect of the charging efficiency of liquid nitrogen, the invention provides the anti-extinguishing device of a kind of underground liquid nitrogen direct injection type, the anti-fire-fighting efficiency of this device is high, can realize the high efficiency control of spontaneous fire in coal mine.
The technical solution adopted for the present invention to solve the technical problems is: the anti-extinguishing device of this underground liquid nitrogen direct injection type comprises liquid nitrogen container, liquid nitrogen container one end is connected with liquid level gauge, the liquid nitrogen container upper end is connected with the liquid nitrogen container liquid inlet control valve, the liquid nitrogen container upper end is connected with safety valve and Pressure gauge, surge tank is sequentially by surge tank nitrogen outlet control valve, upper check valve, the nitrogen reflux pipe is connected with the liquid nitrogen container upper end with liquid nitrogen container nitrogen inlet control valve, liquid nitrogen container lower end order goes out hydraulic control valve by liquid nitrogen container, lower check valve, heat-insulated pipe is connected with the surge tank lower end with the surge tank liquid inlet control valve, surge tank one end is connected with liquid level gauge, the surge tank upper end is connected with safety valve and Pressure gauge, surge tank lower end order is by the funnel-form mouth that confluxes, surge tank goes out hydraulic control valve and is connected with drill pipe.
Liquid nitrogen container is three layers, and between nexine and intermediate layer, between intermediate layer and skin, be filled with heat-insulating material, the surge tank bottom is two-layer, two-layer between the filling heat-insulating material, the surge tank top is individual layer.
The nitrogen reflux pipe is star-like finned tube, and heat-insulated pipe is vacuum low-temperature heat insulation tube.
In liquid nitrogen container of the present invention, liquid nitrogen injects surge tank by heat-insulated pipe, and part liquid nitrogen is vaporized in surge tank, and the nitrogen of vaporization flow back in liquid nitrogen container through the nitrogen reflux pipe, thereby increases the pressure in liquid nitrogen container, improves speed from nitrogen to surge tank that annotate; Liquid nitrogen flows into boring by heat-insulated pipe, enters anti-fire extinguishing zone; In surge tank, nitrogen is different with liquid nitrogen utilizes approach, realizes gas-liquid separation, reduces the impact of vent plug phenomenon.This device can make fire-fighting efficiency improve more than 30%, flame range is administered time shorten more than 20%, can under the traction of underground rails of coal mine car, arrive at the fire dam limit, carry out the movable type fire extinguishing, whole device, without auxiliary equipment such as wind, electricity, belongs to the safety sparkless type, meets instructions for use under coal mine, flexibly and easily, fire extinguishing rapidly, safety and environmental protection, be particularly useful for the high efficiency control of spontaneous fire in coal mine.
120203 working face goafs, colliery, Yang Chang gulf, use trackless rubber tire transportation technology, after adopting this to install open liquid nitrogen filling technology, poured into the liquid nitrogen of 40t in 5 days, the goaf mean temperature has reduced by 2 ~ 4 ℃, to float coal, the significant hypothermal effect is played in oxidation, has effectively suppressed the float coal oxidation rate, has greatly improved the operating environment of 120203 working faces; This average oxygen concentration in working face goaf is less than 10%, inerting gas in the goaf, play the effect that stops spontaneous combustion of remaining coal.Guaranteed the normal back production of this large-mining-height working surface.
The accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of one embodiment of the present of invention.
In figure: 1. liquid level gauge, 2. liquid nitrogen container, 3. Pressure gauge, 4. safety valve, 5. liquid nitrogen container nitrogen inlet control valve, 6. nitrogen reflux pipe, the upper check valve of 7-1, check valve under 7-2,8. liquid nitrogen container liquid inlet control valve, 9. surge tank nitrogen outlet control valve, the 10-liquid nitrogen container goes out hydraulic control valve, 11. heat-insulated pipes, 12. surge tank liquid inlet control valve, 13. base, 14. rail wheels, 15. surge tanks, the mouth 16. funnel-form is confluxed, 17. surge tanks go out hydraulic control valve, 18. drill pipes.
The specific embodiment
In Fig. 1, the anti-extinguishing device of this underground liquid nitrogen direct injection type comprises liquid nitrogen container 2, liquid nitrogen container 2 one ends are connected with liquid level gauge 1, liquid nitrogen container 2 upper ends are connected with liquid nitrogen container liquid inlet control valve 8, liquid nitrogen container 2 upper ends are connected with safety valve 4 and Pressure gauge 3, surge tank 15 orders are by surge tank nitrogen outlet control valve 9, upper check valve 7-1, nitrogen reflux pipe 6 is connected with liquid nitrogen container 2 upper ends with liquid nitrogen container nitrogen inlet control valve 5, liquid nitrogen container 2 lower end orders go out hydraulic control valve 10 by liquid nitrogen container, lower check valve 7-2, heat-insulated pipe 11 is connected with surge tank 15 lower ends with surge tank liquid inlet control valve 12, surge tank 15 1 ends are connected with liquid level gauge 1, surge tank 15 upper ends are connected with safety valve 4 and Pressure gauge 3, surge tank 15 lower ends orders conflux mouthfuls 16 by funnel-form, surge tank goes out hydraulic control valve 17 and is connected with drill pipe 18.
Liquid nitrogen container 2 is three layers, between nexine and intermediate layer, between intermediate layer and skin, be filled with heat-insulating material.Surge tank 15 bottoms are two-layer, two-layer between the filling heat-insulating material, surge tank 15 tops are individual layer.
Nitrogen reflux pipe 6 is star-like finned tube, and heat-insulated pipe 11 is vacuum low-temperature heat insulation tube.
During use, at first open liquid nitrogen container and go out hydraulic control valve 10 and surge tank liquid inlet control valve 12, liquid nitrogen injects surge tank 15 by heat-insulated pipe 11, and in surge tank 15, part liquid nitrogen can be vaporized.In surge tank 15 the liquid nitrogen liquid level reach surge tank tank body total height 1/2 the time, open surge tank nitrogen outlet control valve 9, liquid nitrogen container nitrogen inlet control valve 5 and surge tank and go out hydraulic control valve 17, the nitrogen of vaporization flow back in liquid nitrogen container 2 by liquid nitrogen reflux pipe 6, increase the pressure in liquid nitrogen container 2, improved the speed to surge tank 15 notes nitrogen.The interior liquid nitrogen of surge tank 15 enters anti-fire extinguishing zone by drill pipe 18.
Liquid level gauge 1 is for showing the height of liquid nitrogen in tank, and Pressure gauge 3 is for showing the tank internal pressure.Safety valve 4 on surge tank 15, when hypertonia, normal pressure release, guarantee tank body safety.The pipeline connected with nitrogen reflux pipe 6, heat-insulated pipe 11 two ends is connected with flange.Upper check valve 7-1 on nitrogen reflux pipe 6 pipelines, guarantee that nitrogen flows to liquid nitrogen container 2 by surge tank 15.Lower check valve 7-2 on heat-insulated pipe 11 pipelines, ensure that liquid nitrogen flows to surge tank 15 by liquid nitrogen container 2.Surge tank 15 bottom major parts consist of two-layer cylinder of steel, and two-layer cylinder of steel and surge tank liquid nitrogen outlet junction form funnel-form and conflux mouthfuls 16, and liquid nitrogen confluxes in this, makes liquid nitrogen noresidue in surge tank; The top fraction only has one deck cylinder of steel, there is no heat-insulating property, can make like this part liquid nitrogen vaporization, increases pressure, improves the nitrogen speed of annotating.Base 13 for fixing tank body at base plate.Rail wheel 14 can make device move under the traction of down-hole locomotive, convenient, flexible.
Claims (3)
1. a underground liquid nitrogen direct injection type is prevented extinguishing device, the anti-extinguishing device of this underground liquid nitrogen direct injection type comprises liquid nitrogen container, liquid nitrogen container one end is connected with liquid level gauge, it is characterized in that: the liquid nitrogen container upper end is connected with the liquid nitrogen container liquid inlet control valve, the liquid nitrogen container upper end is connected with safety valve and Pressure gauge, surge tank is sequentially by surge tank nitrogen outlet control valve, upper check valve, the nitrogen reflux pipe is connected with the liquid nitrogen container upper end with liquid nitrogen container nitrogen inlet control valve, liquid nitrogen container lower end order goes out hydraulic control valve by liquid nitrogen container, lower check valve, heat-insulated pipe is connected with the surge tank lower end with the surge tank liquid inlet control valve, surge tank one end is connected with liquid level gauge, the surge tank upper end is connected with safety valve and Pressure gauge, surge tank lower end order is by the funnel-form mouth that confluxes, surge tank goes out hydraulic control valve and is connected with drill pipe, the surge tank bottom is two-layer, filling heat-insulating material between two-layer, the surge tank top is individual layer.
2. the anti-extinguishing device of underground liquid nitrogen direct injection type according to claim 1, it is characterized in that: liquid nitrogen container is three layers, between nexine and intermediate layer, between intermediate layer and skin, be filled with heat-insulating material.
3. underground liquid nitrogen direct injection type according to claim 1 is prevented extinguishing device, and it is characterized in that: the nitrogen reflux pipe is star-like finned tube, and heat-insulated pipe is vacuum low-temperature heat insulation tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100268764A CN102562124B (en) | 2012-02-08 | 2012-02-08 | Underground liquid nitrogen direct injection type fire preventing and extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100268764A CN102562124B (en) | 2012-02-08 | 2012-02-08 | Underground liquid nitrogen direct injection type fire preventing and extinguishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102562124A CN102562124A (en) | 2012-07-11 |
| CN102562124B true CN102562124B (en) | 2013-12-04 |
Family
ID=46408557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100268764A Active CN102562124B (en) | 2012-02-08 | 2012-02-08 | Underground liquid nitrogen direct injection type fire preventing and extinguishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102562124B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828767A (en) * | 2012-07-19 | 2012-12-19 | 大同煤矿集团有限责任公司 | Gob natural fire control method |
| CN104912585B (en) * | 2015-05-21 | 2017-11-10 | 中国矿业大学 | A kind of lossless liquid nitrogen system and method for administering coal-field fire |
| CN107166161B (en) * | 2016-03-08 | 2023-08-04 | 中集安瑞科能源装备（苏州）有限公司 | Liquid unloading system of deep-cold pressure container |
| CN106310569A (en) * | 2016-08-11 | 2017-01-11 | 赵军政 | Liquid-nitrogen fire extinguisher |
| CN109138831A (en) * | 2018-09-30 | 2019-01-04 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of fire-extinguishing integrated technique of New well drilling applied to mine fire rescue |
| CN111803826B (en) * | 2020-07-16 | 2021-09-24 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
| CN112879074A (en) * | 2021-04-07 | 2021-06-01 | 安徽理工大学 | Positive and negative pressure inert injection method and system for rapid fire prevention and extinguishing in goaf |
| CN114395982A (en) * | 2022-01-24 | 2022-04-26 | 中国矿业大学 | Liquid nitrogen supply system with corrosion inhibition and fire extinguishing functions for bridge steel cable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1143858A1 (en) * | 1983-05-23 | 1985-03-07 | Всесоюзный научно-исследовательский институт горноспасательного дела | Self-propelled mine vehicle for delivering fire-fighting equipment and mine rescuers |
| RU2194862C2 (en) * | 2001-01-12 | 2002-12-20 | Российский научно-исследовательский институт горноспасательного дела | Method of extinguishing mine fires and device for method embodiment |
| CN101618255A (en) * | 2008-06-30 | 2010-01-06 | 兖州煤业股份有限公司 | Mine carbon dioxide fire prevention and extinguishment technology and device therefor |
| CN101813000A (en) * | 2009-12-08 | 2010-08-25 | 杜志刚 | Equipment for preventing gas and coal dust explosion on working face |
| CN102052086A (en) * | 2010-07-19 | 2011-05-11 | 束永保 | Mine liquid-CO2 fire preventing and extinguishing process and device |
-
2012
- 2012-02-08 CN CN2012100268764A patent/CN102562124B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1143858A1 (en) * | 1983-05-23 | 1985-03-07 | Всесоюзный научно-исследовательский институт горноспасательного дела | Self-propelled mine vehicle for delivering fire-fighting equipment and mine rescuers |
| RU2194862C2 (en) * | 2001-01-12 | 2002-12-20 | Российский научно-исследовательский институт горноспасательного дела | Method of extinguishing mine fires and device for method embodiment |
| CN101618255A (en) * | 2008-06-30 | 2010-01-06 | 兖州煤业股份有限公司 | Mine carbon dioxide fire prevention and extinguishment technology and device therefor |
| CN101813000A (en) * | 2009-12-08 | 2010-08-25 | 杜志刚 | Equipment for preventing gas and coal dust explosion on working face |
| CN102052086A (en) * | 2010-07-19 | 2011-05-11 | 束永保 | Mine liquid-CO2 fire preventing and extinguishing process and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102562124A (en) | 2012-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102562124B (en) | Underground liquid nitrogen direct injection type fire preventing and extinguishing device | |
| CN102052086B (en) | Mine liquid-CO2 fire preventing and extinguishing process and device | |
| CN103089290B (en) | Self-pressurizing type fire fighting device of liquid carbon dioxide low-temperature storage tank | |
| CN102562125B (en) | Ground direct injection type liquid nitrogen fire preventing and extinguishing system | |
| CN106884638B (en) | A kind of In Situ Heating method of coal bed gas heating exploitation | |
| CN102828767A (en) | Gob natural fire control method | |
| CN108278936A (en) | Down-hole coal bed liquid carbon dioxide fracturing anatonosis system and method | |
| CN104329109A (en) | Gob retardant efficient spraying system and spraying method | |
| CN101618255B (en) | Mine carbon dioxide fire prevention and extinguishment technology and device therefor | |
| CN102937033A (en) | Efficient nitrogen injection and fire extinguishing system for mining | |
| CN108979705A (en) | Underground coupling inert gas fire prevention and extinguishing technology for coal mine | |
| CN102444396B (en) | A kind of natural gas production method | |
| CN112412420A (en) | Hydraulic cavitation, freezing fracturing and heat injection stimulation synergistic anti-reflection pumping-promoting method | |
| CN201248979Y (en) | Mining carbon dioxide fire prevention and extinguishing device | |
| CN112412526B (en) | Coal mine gas and fire disaster co-treatment system and use method thereof | |
| CN201848034U (en) | Liquid CO2 fire preventing and extinguishing device for mines | |
| CN203717015U (en) | Liquid nitrogen cooling fire prevention system | |
| CN204572042U (en) | A kind of mining liquid nitrogen fire extinguishing system | |
| CN205260064U (en) | Mining portable liquid nitrogen fire prevention device | |
| CN202348210U (en) | Orifice blowout preventer for drilling | |
| CN203703606U (en) | Intelligent liquid carbon dioxide injection device | |
| CN206207013U (en) | A kind of mining liquid carbon dioxide pipeline transporter | |
| CN106223921B (en) | A kind of gas fracturing device | |
| CN203626875U (en) | Down-hole moving type extinguishing-preventing device | |
| CN202578751U (en) | Fire extinguishing and cooling system used in coal empty and loose areas of coal field fire zone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |