Mining liquid carbon dioxide pipeline conveying device and conveying method

Abstract

The invention discloses a mining fire extinguishment liquid carbon dioxide long-distance pipeline conveying device. The device comprises a gas-state carbon dioxide storage tank , a liquid-state carbon dioxide storage tank and a conveying pipeline; a pressure stabilizing valve and a pressure meter are arranged at the end, located outside a mine body, of the conveying pipeline, the end, outside the mine body, of the conveying pipeline is communicated with the gas-state carbon dioxide storage tank, the upper end of the conveying pipeline is communicated with the liquid-state carbon dioxide storage tank, the end, located in the mine body, of the conveying pipeline is provided with a pressure control valve, and the end, located in the mine body, of the conveying pipeline is connected with a fire extinguishment pipe. Through the conveying device, the liquid-state carbon dioxide can be directly conveyed. The invention further discloses a conveying method. The method comprises the steps of arranging the conveying pipeline, arranging a fire extinguishment pipe, connecting the conveying pipeline with the gas-state carbon dioxide storage tank and the liquid-state carbon dioxide storage tank, injecting the gas-state carbon dioxide into the conveying pipeline for pressure rising, injecting the liquid-state carbon dioxide into the conveying pipeline for fire extinguishment and the like. Long-distance conveying of the liquid-state carbon dioxide can be simply, effectively and rapidly achieved.

Description

technical field [0001] The invention belongs to the technical field of mine liquid carbon dioxide transportation, and in particular relates to a mine liquid carbon dioxide pipeline transportation device and a transportation method. Background technique [0002] As one of the global disasters, coal spontaneous combustion fires seriously threaten human health and coal mine safety production, causing huge resource loss and environmental pollution. Among the existing coal mine fire prevention and extinguishing technology methods, the liquid carbon dioxide method shows great advantages in the management of mine fire areas because it can achieve rapid cooling on the basis of inertization. [0003] Since the phase state of carbon dioxide is related to pressure and temperature, dry ice will form if the temperature is too low or the pressure is too high, and pipe blockage will occur during long-distance pipeline transportation. If the temperature is too high or the pressure is too lo...

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Problems solved by technology

[0003] Since the phase state of carbon dioxide is related to pressure and temperature, dry ice will form if the temperature is too low or the pressure is too high, and pipe blockage will occur during long-distance pipeline transportation. cooling effect

[0004] At present, the Chinese patent announcement numbers CN201802437U and CN202578775U both disclose a mine-used mobile carbon dioxide storage tank. When using this method, due to the limitation of the transportation roadway, the volume of this low-temperature carbon dioxide liquid storage tank is small, which cannot meet the demand for fire extinguishing. In addition, this method cannot quickly remove the Delivery of liquid carbon dioxide to the target area

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