Abstract: A process and device separate off a volatile component from the off-gases in cement clinker production. Raw materials for cement clinker production are passed through a preheater with heat exchange with the off-gases and are then burnt in a rotary kiln. Owing to the heating in the preheater, the volatile component bound in the raw materials is vaporized and separated off. A first raw material stream having a relatively high concentration of the volatile component is applied to a first line of the preheater and a second raw material stream having a lower concentration of the volatile component is applied to a second line. The volatile component is separated off from the first substream of the off-gases. The first raw material stream heated to a temperature of at least 250° C. with the first substream of the off gases in the first line is combined with the second raw material stream.
Type:
Grant
Filed:
March 5, 2018
Date of Patent:
March 19, 2019
Assignees:
Scheuch GmbH, W&P Zement GmbH, A TEC Holding GmbH
Inventors:
Manfred Lisberger, Andreas Steinwandter, Peter Schwei, Wolfgang Freimann
Abstract: A process and device separate off a volatile component from the off-gases in cement clinker production. Raw materials for cement clinker production are passed through a preheater with heat exchange with the off-gases and are then burnt in a rotary kiln. Owing to the heating in the preheater, the volatile component bound in the raw materials is vaporized and separated off. A first raw material stream having a relatively high concentration of the volatile component is applied to a first line of the preheater and a second raw material stream having a lower concentration of the volatile component is applied to a second line. The volatile component is separated off from the first substream of the off-gases. The first raw material stream heated to a temperature of at least 250° C. with the first substream of the off gases in the first line is combined with the second raw material stream.
Type:
Grant
Filed:
September 5, 2013
Date of Patent:
May 1, 2018
Assignees:
Scheuch GmbH, W&P Zement GmbH, A Tec Holding GmbH
Inventors:
Manfred Lisberger, Andreas Steinwandter, Peter Schwei, Wolfgang Freimann