Process for the disposal of combustible refuses
AssigneeDyckerhoff Engineering GmbH
InventorsHenning Deyhle, Alexander Grisar
Life of this patent
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Abstract
The invention relates to a process for the disposal of combustible refuses in the manufacture of cement clinker by preheating and partly calcining the cement raw meal in a preheater, burning in a rotary kiln and subsequently air cooling the clinker, the refuse being separately burned and the flue gas obtained thereby transfers its heat to the cement raw meal. In the process according to the invention, hot exhaust air of the clinker cooler is fed to the refuse incineration and flue gas having a temperature of from 1000.degree. to 1400.degree. C. is produced during said incineration by means of which the cement raw meal is calcined. The slag of the refuse incineration is separately discharged.
Claims17
In the disposal of combustible refuse and the manufacture of cement clinker from cement raw meal by a process comprising the steps of
- (a) preheating and calcining the cement raw material in a preheater,
- (b) feeding the preheated calcined cement raw material produced in (a) into a cement rotary kiln,
- (c) burning the calcined raw material in the rotary kiln to form clinker, and subsequently air cooling said clinker in a clinker cooler, thereby producing hot exhaust air, and
- (d) incinerating the combustible refuse in an incinerator generating flue gas and slag, and transferring heat from the flue gas to the cement raw material,
- the improvement which comprises
- (i) feeding hot exhaust air from (c) to the incinerator in (d),
- (ii) conducting the incineration in (d) to produce flue gas of 1000.degree.-1400.degree. C. and feeding it to (a), and
- (iii) separating the slag produced in (d).
Dependencies are inferred from the claim text.