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Power Stations are major infrastructure projects and the news that Goa is
going to benefit with a new 250MW X 2 is good news. The load shedding or black
out in a more colloquial term and the damage it does to the plant and
equipment besides causing a lot of inconvenience to the public is beyond
measure.
Coat fired plants have to be associated with other industries to use the
residue of burnt coal or dust(ash) and also the unborn coal. The power station
in consideration should generate about 400 tonnes of coal a day and the volume
per month should be about 12000 tonnes. To overcome such a problem there has
to be a cement plant adjacent to the power station to use the ash. Ash can be
one of the components in cement manufacture.
The coal that does not burn is deposited in the bottom of the boiler and
flushed into an ash lagoon. This material has to be removed daily by trucks
and used for making bricks for construction.
The power station and the associated industries will occupy an area of at
least 5 sq kilometers and development of electricity is ongoing and there
has to be sufficient room for future expansion. Technology changes and the
life of a power station does not exceed 20 years before it becomes obsolete.
The large amount of coal required for daily consumption needs a jetty to
accommodate ships of at least 140,000 capacity and also another jetty for low
sulphur oil deliveries.
The design of the steam boiler is for dual firing as the coal does not ignite
on its own. The boiler pressure will be about 4000psi at 500 degrees
centigrade and the exhaust chimney about 700 ft. high. I do hope our learned
politicians do not object the construction of this project as their objection
will only create un-employment and inconvenience to the public.
Tom de Sousa in Hong Kong.
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