Answer / randhir singh

To provide isolation from vibrators & to reduce thermal stress between hopper and vessel.

Answer / jitendra sharma

The purpose of expansion below is to provide isolation from
vibrators which are mounted on the surface of the vessel.

Their are several no's of vibrators, to remove the fly ash
contents before it's temperature decreases to prevent
solidification of fly ash on the walls of vessel.


All u know that we remove the fly ash from boiler tubes and
APH with help of soot blowing.

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