Device for inhibiting secondary explosion of coal dust by using nitrogen dry powder

Abstract

The invention discloses an experimental device for inhibiting secondary explosion of coal dust by using nitrogen and dry powder, and belongs to the field of inhibition of secondary explosion of coal dust. The device comprises a gas distribution ignition system, a gas-solid explosion suppression system, a data acquisition system and an exhaust system, a pipeline is divided into a gas explosion section I, a middle section II and a coal dust filling section III through explosion venting membranes, and a gas distribution device adds methane-air premixed gas in the gas explosion section I; the ignition device ignites in the gas explosion section I, the controller of the middle section II receives pressure, temperature and flame signals of the sensor and then sprays nitrogen and dry powder, the blocking effect on primary explosion of gas is achieved, and then suppression of secondary explosion of dust induced by gas in the dust filling section III is achieved.

Description

technical field [0001] The invention belongs to the field of secondary explosion suppression of coal dust, in particular to a device for suppressing secondary explosion of coal dust by using nitrogen dry powder. Background technique [0002] The gas dust explosion accident is still one of the most serious disaster accidents in my country's coal mines; once a gas explosion occurs and the dust is suspended in the air, it may cause a secondary dust explosion. If secondary destruction is carried out on the basis, the degree of harm is far greater than that of a single gas explosion, so the secondary explosion of dust often causes greater casualties and property losses. [0003] Existing explosion-proof measures in coal mine roadways include setting up explosion-proof water bag sheds, sink sheds or rock powder sheds to prevent the expansion of gas and coal dust explosion accidents, but the existing explosion-proof measures often fail to achieve the expected isolation for a gas exp...

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Problems solved by technology

[0002] Gas and dust explosion accidents are still one of the most serious disaster accidents in my country's coal mines; once a gas explosion occurs and the dust is suspended in the air, it may cause a secondary dust explosion. Compared with the primary gas explosion, the secondary dust explosion is The degree of damage is far greater than that of a single gas explosion, so the secondary explosion of dust often causes greater casualties and property losses.

[0003] Existing explosion-proof measures for coal mine roadways include setting up explosion-proof water bag sheds, sink sheds or rock powder sheds to prevent the expansion of gas and coal dust explosion accidents, but the existing explosion-proof measures often fail to achieve the expected isolation for a gas explosion Explosion effect, more can not play a role in the continuous explosion of the secondary explosion

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