The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2005
Filed:
Nov. 13, 2002
Carsten Eckert, Köln, DE;
Andreas Hand, Köln, DE;
Robert Mathai, Köln, DE;
KHD Humboldt Wedag AG, Cologne, DE;
Abstract
In order to provide a comparatively simple and cost-effective method for cement clinker production lines where especially raw materials and/or fuel/secondary fuel containing chlorine compounds and a partial gas extraction with an electrostatic dust collector as waste gas dust remover are used, with which the risk of emitting the waste gas pollutants dioxin and/or furan is eliminated, it is proposed in accordance with the invention that the extracted quantity of the partial gas extraction stream, after cooling and electrostatic dust removal, is held lower than the sum of the secondary air drawn through the rotary kiln and the tertiary air drawn past the rotary kiln, and to recirculate the cooled and dedusted partial gas extraction solely into an area of the clinker cooler in which the recuperation air is removed from the clinker cooler, and the dioxins and/or furans of the partial gas extraction are decomposed in the clinker cooler on the hot cement clinker and/or deposited and/or decomposed by the high temperature treatment in the burners of the rotary kiln and the precalcinator.