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WO2021253593A1 - Système de remplissage multifonctionnel alimenté par transition de phase de co2 liquide de fond de trou et procédé d'utilisation - Google Patents

Système de remplissage multifonctionnel alimenté par transition de phase de co2 liquide de fond de trou et procédé d'utilisation Download PDF

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Publication number
WO2021253593A1
WO2021253593A1 PCT/CN2020/108041 CN2020108041W WO2021253593A1 WO 2021253593 A1 WO2021253593 A1 WO 2021253593A1 CN 2020108041 W CN2020108041 W CN 2020108041W WO 2021253593 A1 WO2021253593 A1 WO 2021253593A1
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WO
WIPO (PCT)
Prior art keywords
liquid
pipeline
valve
storage tank
foam
Prior art date
Application number
PCT/CN2020/108041
Other languages
English (en)
Chinese (zh)
Inventor
胡相明
薛迪
程卫民
赵艳云
乔健
张昊
李永生
吴明跃
王刚
陈连军
辛林
贺正龙
鲁义
陆伟
潘荣琨
黄志安
奚志林
许向彬
张青松
王连聪
Original Assignee
山东科技大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 山东科技大学 filed Critical 山东科技大学
Priority to KR1020217040044A priority Critical patent/KR102360278B1/ko
Publication of WO2021253593A1 publication Critical patent/WO2021253593A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E21F5/08—Rock dusting of mines; Depositing other protective substances
    • 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
    • A62C3/02—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam

Definitions

  • the invention relates to the technical field of coal mine fire prevention and extinguishing, in particular to a multifunctional perfusion system capable of perfusing different fire extinguishing materials and a use method thereof.
  • 201810247360.X discloses a grouting tank for fire extinguishing and grouting in coal mines, including a main chamber, agitator, filter chamber and a starting motor.
  • the main chamber is connected to the filter chamber, and the connection is provided with a filter.
  • the upper part of the side is provided with a water filling port, and the lower right part of the main chamber is connected with the slurry storage tank.
  • a power engine is arranged in the slurry storage tank, and a slurry pipeline is provided on the power engine. It mainly uses the power engine as the power source.
  • these power devices have problems such as complicated operation process, high noise, and high maintenance cost.
  • the infusion system of inert gas (such as CO 2 , N 2 ) fire-fighting technology is mostly set on the ground, and the deep mine transportation pipeline is long, which is prone to technical problems such as pressure loss, gas leakage, pipeline blockage, etc., reducing its fire-fighting efficient.
  • One of the objectives of the present invention is to provide a downhole liquid CO 2 phase change power multifunctional injection system, which does not rely on conventional power devices. It uses the liquid CO 2 phase change pressure as the power source, and the liquid CO 2 enters the material storage after vaporization.
  • Tanks, pressurized material storage tanks have sufficient power, continuous and stable high-pressure infusion is conducive to the uniform distribution of fire-fighting materials in the goaf, and can effectively cover high fire sources in the goaf.
  • the perfusion system of the present invention can spray anti-extinguishing materials such as inhibitors, water injection, and three-phase foam injection into the goaf.
  • the present invention adopts the following technical solutions:
  • An underground liquid CO 2 phase change power multifunctional infusion system which includes a power system and a grouting system and a foam system for injecting fire-fighting materials into the goaf.
  • the power system includes a liquid CO 2 storage and transportation tank and transportation and liquid CO main duct connecting the tank 2, the main pipe is provided with a respective evaporator, temperature control and monitoring unit, a vaporizer for liquid CO 2 storage and transportation of liquid CO 2 in tank Carry out vaporization, and carry out real-time monitoring and control of the CO 2 temperature in the main pipeline through the temperature control and monitoring unit;
  • the other end of the main pipeline is connected to two branch pipelines, which are the first branch pipeline and the second branch pipeline respectively;
  • the grouting system includes a material storage tank, related valves, atomizing nozzles, and the first branch pipeline, and the material storage tank, related valves, and atomizing nozzles are all located in the first branch pipeline superior;
  • the foam system includes a foamer, a related control valve and a second branch pipeline, and the foamer and the relevant control valve are all located on the second branch pipeline;
  • the pressurized material storage tank After the liquid CO 2 is vaporized under the action of the vaporizer, it enters the material storage tank through the first branch pipeline, and the pressurized material storage tank has sufficient power and passes through the third
  • the pipeline is filled with fire-fighting materials into the goaf; when it is necessary to fill foam-gel fire-extinguishing materials, the pressurized material storage tank is connected to the fourth pipeline, and then combined with the second branch pipeline.
  • Foam system inject foam gel fire-extinguishing materials into the goaf through a foamer.
  • the liquid CO 2 storage tank enters the material storage tank after being vaporized by the vaporizer, and the pressurized material storage tank has sufficient power, that is, the material storage tank obtains the pressure of the liquid CO 2 phase change
  • the continuous and stable high-pressure material storage tank is conducive to pouring fire-fighting materials into the goaf, and makes the fire-fighting materials evenly distributed, thereby effectively covering the high fire sources in the goaf.
  • the above technical solution includes a grouting system and a foam system.
  • the grouting system can be used to inject fire-preventing materials such as slurry and water into the goaf according to actual needs.
  • the foam system can also be used for mining. Three-phase foam, foam gel and other fire-fighting materials are poured into the empty area. Therefore, the infusion system of the present invention is multifunctional. It can not only inject a single fire-extinguishing material, but also inject a variety of fire-extinguishing materials into the goaf.
  • the liquid CO 2 storage tank is filled with liquid CO 2 by a liquid CO 2 tanker on the well, and the filled liquid CO 2 storage tank is transported to the well.
  • the temperature The control unit is a temperature controller
  • the temperature monitoring unit is a temperature detector
  • the vaporizer, temperature controller, and temperature detector are respectively arranged on the main pipeline from front to back; in the liquid CO 2 storage
  • the main pipeline between the tank and the vaporizer is also provided with a liquid inlet and outlet valve.
  • the liquid CO 2 storage and transportation tanks are filled with liquid CO 2 through the liquid CO 2 tanker on the well, which avoids the pressure loss caused by the long-distance transportation of the ground direct injection CO 2 fire-fighting system, and the problems of icing and pipe blockage are avoided.
  • CO 2 is injected into the goaf along with the pipeline to give play to the excellent suffocation, cooling and inerting characteristics of the inert gas.
  • the relevant valves in the grouting system include a first flow control valve, a first stabilizing valve, a first one-way valve, a first pressure gauge, a first shutoff valve, and a first Two shut-off valves, a first pressure relief valve, and a second pressure relief valve, wherein the first flow control valve, the first stabilizing valve, and the first one-way valve are respectively arranged in the first branch from front to back.
  • a first metal hose is provided on the first branch pipeline between the first pressure regulator valve and the first one-way valve, and the material storage tank is provided on the first branch pipeline.
  • the first pressure gauge is connected above the material storage tank
  • the first shutoff valve and the second pressure relief valve are sequentially connected to the third pipeline
  • the first The second shutoff valve and the first pressure relief valve are sequentially connected to the fourth pipeline.
  • the materials in the above-mentioned material storage tank include coagulant, inhibitor, water, foaming agent, bentonite or a mixture thereof.
  • the material in the material storage tank may include, in addition to the above fire-fighting materials, fire-fighting materials not limited by the present invention.
  • the relevant control valve in the aforementioned foam system includes a third shutoff valve, a second flow control valve, a second pressure regulator valve, a second pressure gauge, and a second check valve, which are sequentially arranged on the second branch pipeline.
  • the aforementioned foamer is located behind the aforementioned second one-way valve, and a second metal hose is provided on the second branch pipe between the aforementioned second regulator valve and the second pressure gauge.
  • the above foamer includes a foamer main body, a slurry inlet, a carbon dioxide gas inlet, and a fire-extinguishing material outlet are provided on the foamer main body, and a carbon dioxide gas introduction gap is provided in the foamer main body.
  • Venturi tube, current collector, foam net is provided on the foamer main body.
  • the aforementioned foamed mesh includes a stainless steel cross fixing frame, stainless steel bolts, a stainless steel disc, and a stainless steel mesh.
  • the aforementioned stainless steel bolts are fixed in the middle of the aforementioned stainless steel cross fixing frame, and the ends of the aforementioned stainless steel fixing frame are just clamped.
  • first pressure relief valve and second pressure relief valve discharge gas or liquid in the pipeline when the pressure in the pipeline is higher than 2.4-3.4MPa; the aforementioned first pressure regulator valve and second pressure regulator valve Allow gas or liquid with pressure higher than 1.5-2MPa in the pipeline to pass through.
  • the above-mentioned atomization nozzle is a detachable design.
  • the atomizing nozzle is set as a detachable type. According to the different fire-fighting materials in the material storage tank, matching nozzles are used to inject different fire-fighting materials into the goaf.
  • Another object of the present invention is to provide a method for using the above-mentioned downhole liquid CO 2 phase change power multifunctional injection system, which sequentially includes the following steps:
  • Adjust the relevant valves of the grouting system observe the proper value of the pressure gauge on the material storage tank, install the atomizing nozzle to spray the inhibitor, and disassemble the atomizing nozzle to inject water and yellow mud;
  • the multifunctional perfusion system of the present invention can be equipped with a variety of fire-fighting materials, and the material storage tank can be filled with coagulant, inhibitor, water, foaming agent, bentonite, etc.
  • the foam system plays a role when injecting fire-fighting materials such as foam gel, barrier foam and three-phase foam; the grouting system plays a role when grouting, spraying inhibitors, and water injection.
  • the multifunctional perfusion system of the present invention is a power system with a liquid CO 2 storage and transportation tank as the main body.
  • This part can not only provide sufficient power, but also can exert the excellent cooling, suffocation and explosion suppression functions of the inert gas.
  • the liquid CO 2 The storage and transportation tanks can be repeatedly poured on the ground, and the storage and transportation tanks can be used in turn to provide sufficient power; the fire-fighting material system with material storage tanks as the main body can be preferably sprayed with chemical inhibitors and injection Phase foam, yellow mud, foam gel and other materials can significantly improve the efficiency of coal fire prevention.
  • Figure 1 is a schematic diagram of the structure of the downhole liquid CO 2 phase change power multifunctional injection system of the present invention
  • Figure 2 is a schematic diagram of the structure of the foaming device of the present invention.
  • Figure 3 is a schematic diagram of the structure of the foaming net in the foaming device of the present invention.
  • the present invention proposes a downhole liquid CO 2 phase change power multifunctional injection system and a method of use.
  • the present invention will be described in detail below with reference to specific embodiments.
  • the present invention is an underground liquid CO 2 phase change power multifunctional perfusion system, as shown in Fig. 1, comprising a liquid CO 2 storage and transportation tank 1, a temperature controller 2, a material storage tank 3, a foamer 4, and a liquid CO 2 tanker 5.
  • the liquid CO 2 storage and transportation tank 1, the temperature controller 2, the liquid inlet and outlet valve 6, the vaporizer 8, and the temperature detector 9 together constitute a power system.
  • the liquid CO 2 storage and transportation tank 1 is connected to the main pipeline, and the main pipeline is The main valve for inlet and outlet, the vaporizer 8, the temperature controller 2, and the temperature detector 9 are respectively provided.
  • the liquid CO 2 tanker 5 is located on the ground and fills the liquid CO 2 storage and transportation tank 1 with liquid CO 2 , and the liquid CO 2 storage and transportation tank 1 is filled and transported downhole to connect the vaporizer 8, the temperature controller 2 and the temperature detector 9 in turn.
  • the above-mentioned main pipeline branches into two branch pipelines, namely the first branch pipeline and the second branch pipeline, wherein the first branch pipeline is connected to the grouting system, and the second branch pipeline is connected to the foaming system.
  • first flow control valve 10 Connects the first flow control valve 10, the first stabilizing valve 11, the first metal hose 12 and the first one-way valve 13 to the first branch pipeline of the grouting system, and then connect the first pressure gauge 14
  • the end of the material storage tank 3 is connected to the third pipeline and the fourth pipeline, and the first shutoff valve 20 and the first pressure relief valve 24 are connected to the third pipeline to lead into the goaf;
  • Foaming system connect the third cut-off valve 22, the second flow control valve 15, the second stabilizing valve 16, the second metal hose 17, the second pressure gauge 18 and the second one-way valve to the second branch pipeline 19. At the end, connect to the carbon dioxide gas inlet 4-4 of the foamer.
  • the end of the material storage tank is connected to the slurry inlet 4-1 of the foamer through a fourth pipe.
  • the foamer includes a foamer main body, on which a slurry inlet 4-1, a carbon dioxide gas inlet 4-4, and a fire-extinguishing material outlet 4-7 are provided.
  • the main body of the foamer is provided with a carbon dioxide gas introduction gap 4-2, a venturi tube 4-3, a current collector 4-5, and a foaming net 4-6.
  • Foam mesh 4-6 includes stainless steel cross fixing frame 4-6-1, stainless steel bolt 4-6-2, stainless steel disc 4-6-3 and stainless steel mesh 4-6-4, stainless steel bolt is fixed on stainless steel cross fixing frame In the middle, the end of the stainless steel fixing frame happens to be clamped on the inner wall of the stainless steel disc.
  • the aforementioned first pressure relief valve and second pressure relief valve discharge the gas or liquid in the pipeline when the pressure in the pipeline is higher than 2.4-3.4MPa; the aforementioned first pressure regulator valve and second pressure regulator valve Allow gas or liquid with pressure higher than 1.5-2MPa in the pipeline to pass through.
  • the above-mentioned atomizing nozzle is a detachable design, which is convenient for replacement.
  • the foamer 4 is used to infuse hindered foam, three-phase foam, foam gel, etc.
  • the liquid CO 2 storage and transportation tank 1 is connected to the liquid CO 2 tanker 5 through the inlet and outlet main valve 6 and the filling valve 7 on the ground.
  • the inlet and outlet main valves 6 and the filling valve 7 are opened to remove the liquid CO 2 in the liquid CO 2 tanker 5 Fill the liquid CO 2 storage and transportation tank 1, and transport the liquid CO 2 storage and transportation tank 1 to the well.
  • Connect the inlet and outlet main valve 6, vaporizer 8, temperature controller 2, temperature detector 9, and first flow control valve 10 through pipelines.
  • the first regulator valve 11, the first metal hose 12, the first one-way valve 13, the material storage tank 3 containing the inhibitor, the material storage tank 3 is connected to the first shutoff valve 20 and the second pressure relief valve in sequence 24 and atomizing nozzle 25.
  • the first step is to open the liquid inlet and outlet valve 6 to let the liquid CO 2 flow out, adjust the vaporizer 8 to vaporize the liquid CO 2 , and observe the temperature detector 9 at the same time.
  • the controller 2 adjusts the temperature to above 0°C, and in the second step, open and adjust the first flow control valve 10 and the first stabilizing valve 11 to adjust the values to the target position.
  • the inhibitor can be sprayed to the goaf ,
  • the liquid CO 2 storage and transportation tank 1 can be rotated according to the specific implementation conditions, and the temperature and pressure of each part of the system can be adjusted according to site requirements.
  • the liquid CO 2 storage and transportation tank 1 is connected to the liquid CO 2 tanker 5 through the liquid inlet and outlet main valve 6 and the filling valve 7 on the ground.
  • the liquid inlet and outlet main valve 6 and the filling valve 7 are opened to fill the liquid CO 2 into the storage and transportation tank 1.
  • the first branch pipeline Connect the first flow control valve 10, the first stabilizing valve 11, the first metal hose 12, the first one-way valve 13 and the material storage tank 3 containing foaming liquid in sequence, and the material storage tank is connected to the second shutoff valve 21
  • the end of the second pressure relief valve 23 is connected to the foamer slurry inlet 4-1.
  • the second branch pipeline is successively connected with the third shut-off valve 22, the second flow control valve 15, the second stabilizing valve 16, the second metal hose 17, the second pressure gauge 18, and the second one-way valve 19, and finally It is connected to the carbon dioxide gas inlet 4-4 of the foamer.
  • the first step is to close the first shut-off valve 20, open the second shut-off valve 21, and the third shut-off valve 22, open the liquid inlet and outlet valve 6 to let the liquid CO 2 flow out, and vaporize the liquid CO 2 through the vaporizer 8 while observing the temperature detection If the temperature is lower than 0°C, in order to avoid freezing of the pipeline, immediately turn on the temperature controller 2 to keep the temperature above 0°C; in the second step, open and adjust the first flow control valve 10 and the first regulator valve 11. As well as the second flow control valve 15, the second pressure regulator valve 16, adjust the value to the desired position. After completing the above operations, observe the foam shape at the outlet of the pipeline. If the foam shape does not meet the requirements, adjust the pressure valve. Fill the goaf with foam fire-fighting materials such as barrier foam and foam gel.
  • the liquid CO 2 storage and transportation tank 1 can be rotated according to the specific implementation conditions. The temperature and pressure of each part of the system can be adjusted according to the field application.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

L'invention concerne un système de remplissage multifonctionnel alimenté par transition de phase de CO2 liquide de fond de trou, qui appartient au domaine technique de la prévention et de l'extinction d'incendie pour une mine de charbon. Ledit système de remplissage comprend un système d'alimentation, un système d'injection pour remplir un remblai avec une matière de prévention et d'extinction d'incendie, et un système de mousse, et le système d'alimentation comprend un réservoir de stockage et de transport de CO2 liquide (1) et une conduite principale raccordée à celui-ci ; le CO2 liquide entre dans un réservoir de stockage de matière (3) par l'intermédiaire d'une première conduite de ramification après avoir été vaporisé sous l'action d'un vaporisateur (8), et le réservoir de stockage de matière (3) sous pression possède une alimentation suffisante et remplit le remblai avec la matière de prévention et d'extinction d'incendie par l'intermédiaire d'une troisième conduite ; et lorsqu'il est nécessaire de remplir avec une matière de prévention et d'extinction d'incendie de type gel mousseux, le réservoir de stockage de matière (3) sous pression est raccordé à une quatrième conduite, et est ensuite combiné avec le système de mousse raccordé à une deuxième conduite de dérivation, de telle sorte que le remblai est rempli avec la matière de prévention et d'extinction d'incendie de type gel mousseux au moyen de mousses générées par un dispositif de production de mousse. L'invention concerne également un procédé pour l'utilisation du système de remplissage multifonctionnel alimenté par transition de phase de CO2 liquide de fond de trou. Le système de remplissage ne nécessite pas de dispositif d'alimentation, permet un remplissage avec différentes matières de prévention et d'extinction d'incendie, et possède une vaste applicabilité.
PCT/CN2020/108041 2020-06-16 2020-08-10 Système de remplissage multifonctionnel alimenté par transition de phase de co2 liquide de fond de trou et procédé d'utilisation WO2021253593A1 (fr)

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KR1020217040044A KR102360278B1 (ko) 2020-06-16 2020-08-10 갱내 액상 co2 상변화 동력 다기능 관류 시스템 및 사용방법

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CN202010545532.9 2020-06-16
CN202010545532.9A CN111810218B (zh) 2020-06-16 2020-06-16 一种井下液态co2相变动力多功能灌注系统及使用方法

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CN114517707A (zh) * 2022-03-08 2022-05-20 西安科技大学 煤矿井下煤自燃与瓦斯灾害液态co2综合防治模式
CN115814319A (zh) * 2022-09-27 2023-03-21 陕西陕煤铜川矿业有限公司 一种煤矿车载式灭火系统及方法
CN117191632A (zh) * 2023-11-02 2023-12-08 中国石油天然气集团有限公司 二氧化碳相变实验系统及实验方法
CN117328925A (zh) * 2023-08-24 2024-01-02 山东科技大学 一种矿用干冰蓄冷超高水材料的多功能灌注系统和方法

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CN113686630A (zh) * 2021-07-30 2021-11-23 云汇环保科技南通有限公司 一种用于新型模拟实况的co2发生器
CN113735500B (zh) * 2021-10-12 2022-05-17 山东科技大学 一种多孔球形颗粒、制备方法及其在矿山采空区的应用
CN114673551A (zh) * 2022-04-20 2022-06-28 安徽理工大学 一种老采空区co2矿化注浆方法
CN115887978B (zh) 2022-10-18 2023-11-24 山东科技大学 基于矿井火区特征的液氮直注和低温发泡智能灌注系统及应用方法
CN116393099B (zh) * 2023-04-26 2024-12-13 山东科技大学 一种可吸附co2的雪花状多孔水合物材料及应用系统

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