Additional cooling through injection into the top cyclone of the preheater gives you various advantages. On the one hand, it supports subsequent cooling in the duct or gas cooling tower, while temperature peaks can be compensated on the other.
The associated temperature reduction decreases the operating gas flow rate. This reduces the energy required by the downstream fan, which may also eliminate the need to exchange it. In addition, the efficiency of the cyclone is increased through the moistening of the raw material.