involved in coal handling
Coal delivery equipment is one of the major components of
plant cost. The various steps involved in coal handling are as follows:
1. Coal delivery.
5. Outdoor storage
6. Covered storage
8. Weighing and
9. Feeding the
coal into furnace.
Figure: Steps involved in fuel
The coal from supply points is delivered by ships or boats
to power stations situated near to sea or river whereas coal is supplied by
rail or trucks to the power stations which are situated away from sea or river.
The transportation of coal by trucks is used if the railway facilities are not
The type of equipment to be used for unloading the coal
received at the power station depends on how coal is received at the power
station. If coal delivered by trucks, there is no need of unloading device as
the trucks may dump the coal to the outdoor storage. Coal is easily handled if
the lift trucks with scoop are used. In case the coal is brought by railways
wagons, ships or boats, the unloading may be done by car shakes, rotary car
dumpers, cranes, grab buckets and coal accelerators. Rotary car dumpers
although costly are quite efficient for unloading closed wagons.
When the coal delivered is in the form of big lumps and it
is not of proper size, the preparation (sizing) of coal can be achieved by
crushers, breakers, sizers, driers and magnetic separators.
After preparation coal is transferred
to the dead storage by means of the following systems.