Method and device for reprocessing wet waste materials containing organic components
AssigneeHolcim Technology Ltd
InventorUrs Gasser
Life of this patent
Estimating the term…
Abstract
In a method for reprocessing wet waste materials containing organic components, in particular sludges in a cement clinker production plant, in which raw meal is preheated in a preheater (3) in countercurrent flow to the hot exhaust gases of a clinker furnace (2), and calcined in a calciner (4) fired with alternative fuels, the wet waste materials are dried in a drying unit (18) using a hot gas produced from the preheater waste heat and the dried waste materials and the drier exhaust gases are discharged from the drying unit (18), wherein the drier exhaust gases are introduced into the calciner (4).
Claims20
A method for reprocessing wet waste materials containing organic components comprising sludges in a cement clinker production plant, wherein said method comprises preheating raw meal in a preheater in countercurrent flow to the hot exhaust gases of a clinker furnace, calcining in a calciner fired with alternative fuels, drying the wet waste materials in a drying unit using a hot gas produced from the preheater as waste heat, wherein the preheater waste heat is drawn off from the preheater in at least two different points of the preheater at two different temperature levels, so that at least two waste heat streams are created and the temperature of the hot gas which is fed to the drying unit is adjusted by selecting the mixing ratio of the waste heat streams, discharging the dried waste materials and the drier exhaust gases from the drying unit, and feeding the drier exhaust gases into the calciner.
Dependencies are inferred from the claim text.