Coal mine fire prevention and extinguishing method using pit mouth power plant flue gas

Abstract

The invention discloses a method for preventing and extinguishing fire of a coal mine through pithead power plant flue gas. The method includes: collecting flue gas from an outlet of a desulfurizer of a pithead power plant of the coal mine, performing denitration, dehumidification, cooling and dedusting treatment on the flue gas through a flue gas pre-treatment system, enabling the flue gas to enter a conveying and smoke filling system, pressurizing the flue gas through the smoke filling system, and filling the flue gas under a well. The flue gas of the pithead power plant is directly filled into an underwell goaf through a pipeline, the flue gas is combustion product, the oxygen content is low, and the aim of effectively preventing and controlling coal spontaneous combustion can be achieved. The flue gas belongs to industrial waste, and compared with the traditional nitrogen generation technology, the method for preventing and extinguishing fire of the coal mine is low in cost, saves energy caused by nitrogen generation, saves a large amount of capitals for enterprises, and reduces discharging of the carbon dioxide in the air by blocking partial carbon dioxide due to large carbon dioxide adsorbing capacity of coal.

Description

technical field [0001] The invention relates to the technical field of coal mine safety production, in particular to a coal mine fire prevention and extinguishing method. Background technique [0002] Coal mines with spontaneous combustion hazards are widely distributed in our country, and exist in almost all coal mining areas. Mining areas such as Yanzhou, Shendong, Pingdingshan, Kailuan, Xinwen, Yima, Datong, Fushun, Fuxin, Tiefa, Xuzhou, and Tongchuan are seriously at risk of spontaneous fires. There are also 12 open-pit mines that belong to spontaneous combustion hazard mines. In my country's key state-owned coal mines, mines with coal spontaneous combustion account for 56% of the total number of mines, and fires caused by coal spontaneous combustion account for 90% to 94% of the total number of mine fires. In 7 provinces and autonomous regions including Xinjiang, Ningxia, Inner Mongolia, Gansu, Qinghai, Shaanxi, and Shanxi, the cumulative burning area of ​​coalfield f...

AI Technical Summary

Problems solved by technology

Nitrogen injection to prevent and extinguish fires has been widely used in coal mines, but the cost of nitrogen production is high and consumes a lot of energy

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