Читать книгу Coal-Fired Power Generation Handbook - James Speight G., James G. Speight - Страница 94

In the Chevron method, the stockpiling unit moves along the storage area on an axis which divides the area in equal parcels and spills the coal in triangular prism-shaped stockpiles (like the chevrons on a military uniform). The stockpiling operation is first performed along the first prism. The machine spills the second layer on its way back and continues the same operation until the desired final stockpile height is reached.

When this method is used, the rain water flows down on the slopes of the stockpiled coal. In summertime, since the surface area exposed to the hot air is larger, drying effect becomes more significant. In addition, the rock particles not picked out in the production process roll down on the slopes during stockpiling and consequently separate from the coal.