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Advantages of Thermic fluid heater over steam gernerators

1) High temperature operation at atmospheric pressure

2) Optional temperature level set points

3) No supply of treatment of heat water and hence no heat loss due to condensate flash steam

4) No risk of corrosion

5) Easy to operate

Working principle

The thermic fluid heater is made with coils of seamless tubes. The thermic fluid is heated during
the flow through the tubes. The heat is transferred to the fluid as radiant heat in the
combustion chamber, where the inner cylindrical tube coil and a flat tube coil form the
chamber wall and the bottom respectively. The hot thermic fluid is circulated to various process
equipments like heat exchangers, dryers etc. where it gives up the heat. The return oil at a
temperature 10 to 20 deg.cen less comes back to the thermic fluid heater to get heated up
again. The circulation is carried out by a thermic fluid circulation pump.

The thermic fluid heater operates between two temperature ranges. Once the upper limit is
reached the burner is switched off or goes into the low fire mode. And when the temperature
reaches the lower limit due to heat transfer in the process, the burners come ON again.

Since the thermic fluid heaters operate at a high temperature i.e 250 -300 deg. cen,the leaving
exhaust gas temperature are more than the fluid temperature. Hence,the heat loss through the
flue gas is a major component of fuel losses.This offers potential for heat recovery if there is a
suitable application.

The capacity of the thermic fluid heater is specified in terms of Lakh Kilo Calories per hour or
Million Kilo Calories per hour.