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:
Jun. 10, 2008
Filed:
Aug. 30, 2004
Lars Skaarup Jensen, Vallensbaek, DK;
Jens Peter Hansen, Köpenhamn Ö, DK;
Lars Skaarup Jensen, Vallensbaek, DK;
Jens Peter Hansen, Köpenhamn Ö, DK;
F. L. Smidth A/S, Valby, DK;
Abstract
Described is a method as well as a plant for preheating particulate or pulverulent material such as cement raw meal or similar material in a cyclone preheater (), comprising at least two cyclone stages, each comprising a riser duct () and a cyclone (). The method is peculiar in that a portion of the material which is fed to at least one cyclone stage is introduced to the first part of the riser duct, viewed in the direction of travel of the exhaust gases, and is heated from a temperature of maximum 450° C. to a temperature of at least 550° C., and in that the remaining material which is fed to the same cyclone stage is introduced into the last part of the said riser duct. As a result, there will be a reduction in the amount of SOwhich is discharged from the cement plant preheater as emission, without a simultaneous increase in energy consumption.