Device and method for transmitting liquid carbon dioxide used for firefighting by means of surface drilling
A technology of liquid carbon dioxide and gaseous carbon dioxide, applied in fire rescue, gas/liquid distribution and storage, pipeline support, etc., can solve the problem of transporting fire extinguishing materials to the fire extinguishing area, and achieve the purpose of avoiding hole collapse, novel and reasonable design, and structure simple effect
Inactive Publication Date: 2016-12-21
XIAN UNIV OF SCI & TECH
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Problems solved by technology
The delivery device can realize the direct delivery of liquid carbon dioxide and ensure the sufficient supply of liquid carbon dioxide when extinguishing fires in underground fire areas. Liquid carbon dioxide is transported to the underground fire area for fire extinguishing
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[0044] like figure 1 The conveying device for liquid carbon dioxide used for ground drilling fire extinguishing shown includes a gaseous carbon dioxide storage tank 1, a liquid carbon dioxide storage tank 4 and a delivery pipe 12, and the delivery pipe 12 is arranged in a borehole 16 extending downward from the ground 15 Inside, the borehole 16 is located directly above the downhole fire area 18, and the upper end of the delivery pipe 12 is provided with a pressure stabilizing valve 8 for supplying gas or liquid with a pressure higher than 1.6MPa-2MPa into the delivery pipe 12, The lower end of the conveying pipe 12 is provided with a pressure control valve 17 for releasing the gas or liquid in the pipe when the pressure in the pipe is greater than 2MPa-2.5MPa, and the conveying pipe 12 is provided with a pressure control valve for observing the pressure in the pipe. Pressure gauge 9, the upper end of the delivery pipe 12 communicates with the gaseous carbon dioxide storage ta...
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The present invention discloses a device for transmitting liquid carbon dioxide used for fire fight by means of surface drilling. The device comprises a gaseous carbon dioxide storage tank, a liquid carbon dioxide storage tank, and a transmission tube; the transmission tube is disposed in a drill hole extending downwards from a ground surface; an upper end of the transmission tube is provided with a pressure maintaining valve; a lower end of the transmission tube is provided with a pressure control valve; a piezometer is disposed on the transmission tube; the upper end of the transmission tube is communicated with the gaseous carbon dioxide storage tank through a first connection tube; and the upper end of the transmission tube is communicated with the liquid carbon dioxide storage tank through a second connection tube. The transmission device can achieve direct transmission of the liquid carbon dioxide. The present invention further discloses a method for transmitting liquid carbon dioxide. The method comprises the following steps: drilling the drill hole downwards from the ground surface right above a fire area in a well; mounting the transmission tube; connecting the transmission tube to the gaseous carbon dioxide storage tank and the liquid carbon dioxide storage tank; injecting gaseous carbon dioxide in the transmission tube for boosting the pressure; and injecting liquid carbon dioxide in the transmission tube for firefighting. The transmitting method is easy to operate and is effective.
Description
technical field [0001] The invention belongs to the technical field of liquid carbon dioxide transportation, and in particular relates to a liquid carbon dioxide transportation device and a transportation method for ground drilling fire extinguishing. Background technique [0002] my country's coal spontaneous combustion fire is very serious. After a fire occurs in an underground coal mine, due to the complexity of the underground environment, if the fire cannot be extinguished directly from the underground, it is necessary to evacuate to the ground and directly drill vertically into the fire area, and take measures to control and control the fire area through the ground drilling. Among the existing coal mine fire extinguishing technology methods, the liquid carbon dioxide method shows great advantages in the control of mine fire areas because it can realize rapid cooling through vaporization on the basis of inertization. If the temperature is too low or the pressure is too...
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IPC IPC(8): F17D1/08F17D1/14A62C31/00A62C31/28F16L3/10
CPCA62C31/00A62C31/28F16L3/1016F17D1/082F17D1/14
Inventor 翟小伟王凯邓军于志金张嬿妮王彩萍
Owner XIAN UNIV OF SCI & TECH
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