Device and process for preparing aerosol for preventing coal from spontaneous combustion

Abstract

The invention relates to a device and a process for preparing aerosol for preventing coal from spontaneous combustion, and solves the problem of spontaneous combustion of coal in a coal mine goaf, in particular to residual coal in a high space. The device comprises a jet current proportion device, an aerosol atomization device and a pneumatic conveying device, wherein the jet current proportion device comprises a jet current proportioner, a pressure water inlet connected with a spray nozzle of the jet current proportioner, as well as an inhibitor inlet connected with a liquid absorption chamber of the jet current proportioner, and a delivery outlet of the jet current proportioner is connected with a liquid inlet of the aerosol atomization device; the aerosol atomization device comprises an atomization chamber, and an aerosol delivery outlet of the atomization chamber is connected with a suction inlet of the pneumatic conveying device; and the pneumatic conveying device comprises a pneumatic conveyor, a pneumatic conveying device suction inlet communicated with the pneumatic conveyor as well as a pressure gas inlet and a pneumatic conveying device delivery outlet which are communicated with the pneumatic conveyor. According to the device and the process, an inhibitor is diluted by water and then atomized, and finally, atomized inhibiting aerosol is conveyed to the goaf with pressure gas.

Description

technical field [0001] The invention relates to the technical field of coal spontaneous combustion fire prevention in goafs. Background technique [0002] 56% of coal mines in the country have the risk of spontaneous combustion, causing direct and indirect economic losses of nearly 10 billion yuan every year. Existing fire prevention and extinguishing technologies all achieve fire prevention and extinguishment by reducing or reducing the combination of coal and oxygen. It is more difficult to prevent and inert the goaf where the air leakage is relatively smooth. In particular, the adoption of fully-mechanized mining and fully-mechanized caving mining technology has increased the intensity of mine mining, the ventilation system has become relatively complex, and the scope of goafs has continued to expand. However, goafs are the areas where spontaneous combustion fires are most likely to occur most frequently, and the number has increased significantly. The frequency of mine ...

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Problems solved by technology

[0003] At present, the main means to prevent coal spontaneous combustion are cooling (such as water injection, grouting, colloid injection, three-phase foam injection, etc.) The fire prevention and extinguishing in the low-level space of the mining area has played a positive role, but it is not fully effective for the fire in the high-level space of the remote goaf

Since coal spontaneous combustion mostly occurs in the goaf, the area of ​​the goaf is large, the source of the fire is relatively hidden and it is difficult to determine its specific location, conventional fire prevention materials are difficult to fill in a large area, and do not have good accumulation properties. It is not ideal for the prevention and control of coal spontaneous combustion fires in gobs and other areas of working faces

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