During the process of cement manufacturing, a
substantial quantity of heat is rejected as waste by means of
hot flue gases. The source of this heat is mainly the hot gases
form the rotary kiln and clinker cooler. In recent
advancements, it is seen that this heat could be recovered
and converted into electrical energy by installing a typical
waste heat recovery system. This system is very much
similar to a small scale power plant.
The waste heat recovery boiler is a very
important component of this system. The interaction
between the hot flue gas and the boiler is a very important
process of consideration. It is foreseen that the sticky and
abrasive nature of the hot flue gas will cause corrosion in
the tubes of the boiler. The objective of this study is to
identify a corrosion resistant material for the design of the
boiler tubes. This would enhance the life of the boiler tubes
without affecting the efficiency of the boiler. This project
proposes silicon carbide to be used as the coating material
over the tubes made of carbon steel material. This is
primarily because silicon carbide is having the property of
high temperature resistance, corrosion resistance, high
hardness and high thermal shock resistance.
In this present work, preliminary design of heat exchanger
was made for the heat exchanger for a typical cement plant.
Using these design parameters, a model was created in
Solidworks and analyzed in CFD for maximum efficiency.

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Thu, 14/04/2011 - 01:48