A device and method conducive to moisture absorption and heat storage guided discharge in coal piles

Abstract

The invention discloses a device and method for water absorption and heat storage guide discharge in coal heaps, comprising a metal labyrinth body (1), a metal column body (2) and an auxiliary air duct (3), the metal The cylinder (2) is a cylindrical body with openings at both ends, the upper port of the metal cylinder (2) is provided with an isolation net (4), the metal labyrinth body (1) is arranged in the metal cylinder (2), and the metal The labyrinth body (1) is provided with a filling cavity, the lower port of the metal labyrinth body (1) is provided with a mesh isolation cover (6), and the auxiliary air duct (3) is arranged in the metal cylinder (2), Part of the pipe body of the auxiliary airway (3) extends into the metal labyrinth body (1) through the through hole at the upper end of the metal labyrinth body (1). There is no need for direct contact between water and coal, so as to avoid water accelerating the exothermic reaction of coal piles at the initial stage of coal spontaneous combustion; at the same time, it can use the phase change of water to absorb heat for directional heat conduction, thereby reducing the temperature inside the coal pile and preventing spontaneous combustion of coal piles .

Description

technical field [0001] The invention relates to a device and method for preventing spontaneous combustion of coal piles, in particular to a device and method for helping moisture absorption in coal piles and heat storage and guiding discharge. Background technique [0002] There is a serious problem of spontaneous combustion of mined coal during transportation and storage. The spontaneous combustion of coal is due to the oxidation reaction between the internal coal and oxygen after the coal is piled up, which makes the internal temperature of the coal pile rise and cannot be emitted, and finally makes the coal inside The spontaneous combustion of the coal pile occurs when the temperature reaches the ignition point. Once coal spontaneous combustion occurs, on the one hand, it will cause the loss of coal reserves and calorific value; on the other hand, the smoke generated by spontaneous combustion will cause great harm to human health and the environment. Based on this, many ...

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Problems solved by technology

Once coal spontaneous combustion occurs, on the one hand, it will cause the loss of coal reserves and calorific value; on the other hand, the smoke generated by spontaneous combustion will cause great harm to human health and the environment.

Based on this, many solutions have been proposed, such as water injection, grouting or foam after the coal is on fire, but these methods cannot suppress the initial stage of coal spontaneous combustion, and will cause part of the coal and coal calorific value loss after treatment

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