3. Cooler Thermal Efficiency:
* 100
h = A - B
A
Notation:
A = Heat content of clinker leaving the kiln
B = Heat losses of clinker cooler
B consists of =
Heat loss in cooler exit air
Heat loss in clinker leaving cooler
a =
Heat loss by radiation
b =
c =
4. Items influence the efficiency
The clinker must be brought in an intensive contact
with the cooling air
The quantity of available cooling air affects the
efficiency
The efficiency is not only determined by the machine
itself, but also by the amount of cooling air.
The granulometry of the clinker affects the cooling
efficiency
5. Rough guideline for the Heat Balance
Heat input by clinker 1200oC 100%
Heat output
By secondary air 750oC 68%
By shell losses 22%
By clinker outlet 170oC 10%
6. Rough guideline for the Heat Balance
Heat input by clinker 1200oC 100%
Heat output
By secondary air 750oC 68%
By shell losses 22%
By clinker outlet 170oC 10%