Method and Apparatus for Baking Clinker
AssigneeSüDbayerisches Portland-Zementwerk Gebr. WiesböCk & Co. GmbH
InventorHelmut Leibinger
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Abstract
To produce cement clinker by baking of raw meal in a kiln, use is conventionally made of a raw meal preheater in which the heat of the flue gas emerging from the kiln is transferred to the raw meal. In order to remove impurities which accumulate in circulation between the kiln and the raw meal preheater, a part of the flue gas is extracted from the kiln, bypassing the raw meal preheater. The heat generated during the baking of cement clinker can be used particularly efficiently if the flue gases extracted and diverted past the raw meal pre-heater are used in a boiler to generate hot steam which can subsequently be expanded in a turbine.
Claims12
An apparatus for manufacturing clinker, comprising:
- at least one kiln configured to bake raw meal to convert the raw meal into clinker, the kiln having at least one outlet for flue gases and at least one branch for flue gases in order to divert a portion of the flue gases to separate contaminants,
- at least one raw meal preheater connected to the outlet in such a manner that the flue gases leaving the outlet enter the raw meal preheater to heat the raw meal, and
- at least one first heat exchanger to pressurize a fluid using the heat generated during the combustion process in the kiln in order to subsequently expand it in at least one turbine,
- wherein
- the first heat exchanger is connected to the branch in such a manner that the heat from the diverted portion of the flue gas is supplied to the fluid.
A process for the production of clinker, comprising:
- baking a raw meal to produce clinker in a kiln,
- heating the raw meal in a raw meal preheater with flue gases emitted from the kiln,
- diverting a portion of the flue gases past the raw meal preheater,
- generating steam with the heat generated during the combustion process in the kiln,
- expanding the steam with at least one turbine,
- wherein
- the heat to generate the steam is extracted from the diverted flue gases.
Dependencies are inferred from the claim text.