Utilising process heat in cement-clinker process - thus reducing amt. of energy needed per tonne of prod.

摘要

In the energy flow produced during the cement-clinker process, the hot clinker is introduced into a heat exchanger after leaving the rotating oven giving a temp. rise in the process gas of an air turbine after leaving the turbine, which corresponds to the required preheated combustion air. The clinker is then passed to a further heat exchanger which produces the heat to operate the same air turbine plant. The same process gas flows through the turbo compressor, the first and second heat exchangers, the air turbine and then as preheated combustion air flows into the rotating oven. The heat exchangers are of tubular or box-type design. The hot clinker is transported on a conveyor belt system, which travels through a stationary housing, whose walls are made of tubes. ADVANTAGE - The process reduces the amt. of energy needed per tonne of prod., reduces expenditure of appts. and improves appts. leading to a redn. in pollution levels.