Spontaneous combustion solution for circular coal storages - water vapour storage method

Abstract

The invention relates to a scheme and a storage method which can thoroughly solve the phenomenon of spontaneous combustion in circular coal storages, i.e. a spontaneous combustion solution for circular coal storages - a water vapour storage method. A pipeline is reasonably laid on the bottom of a coal storage to input water vapour into the coal storage, the water vapour then continuously seeps into the coal storage via water vapour discharge holes on the pipeline, so that the coal stored in the coal storage can be always covered in the water vapour, the input of the water vapour can ensure the that temperature of the stored coal cannot exceed 100 DEG C and that the moisture in the coal can be kept in a stable and balanced state for a long time, and consequently, the method solves the problems of constant temperature rise and moisture loss as the result of the oxidative decomposition of the coal stored for a long time, so that the phenomenon of spontaneous combustion cannot take place any more in the circular coal storage. The method is also applicable to the fields of coal storage, sulphur storage and the like in circular storages.

Description

Technical field: [0001] The invention relates to a new material storage method of a round coal yard - a steam storage method, which can completely solve the spontaneous combustion of the round coal yard. [0002] The research shows that the moisture level in coal is an important factor to determine the temperature rise of coal piles. The balance between the latent heat of evaporation of moisture in coal and the heat of oxidation of coal determines the rise in temperature of the coal pile, and tends to balance when the temperature rise reaches 80-90°C. If the moisture in coal is high, this balance can be maintained for a long time. The introduction of steam into the coal yard can ensure that there is sufficient moisture in the coal, and the temperature of the coal pile will be in a stable state for a long time. Therefore, coal can be stored for a long time without spontaneous combustion. In addition, the introduction of steam into the coal yard can make the air volume in the ...

AI Technical Summary

Problems solved by technology

[0009] 3. Since the air enters the coal seam from the bottom of the coal pile and circulates upwards, the air should be able to circulate freely on the coal pile so that the heat generated by the coal oxidation can be easily lost, but it is best to compact the coal pile in layers. prevent air from circulating

[0010] 4. Cone-shaped coal piles are prone to spontaneous combustion, because larger coal pieces often fall outside the cone, which provides a "window effect" for the coal powder in the middle, and the garden-shaped coal yard is not suitable for long-term storage of coal