Which of the following is not true with regard to an economizer in a
steam boiler?
It is used
for recovery of heat from flue gases
It gives increased boiler efficiency
It produces
superheated steam
It preheats feed-water
It produces
superheated steam
● The common
application of economizers in steam power plants is to capture the water heat
from boiler stack gases (flue gas) and transfer it to the boiler feed water.
● This raises
the temperature of the boiler feeder, lowering the needed energy input in turn
reducing output, which leads to increase, the efficiency.
Hence, the
correct option is (C).
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