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:
Oct. 29, 2002
Filed:
Apr. 02, 1998
Peter Gaiser, München, DE;
Ulrich Plantikow, München, DE;
Dieter Kowalczyk, Mariestad, SE;
Andritz-Patentverwaltungsgesellschaft m.b.H., Graz, AT;
Abstract
A process and a device for continuously drying protein-containing sludge, in particular sewage sludge, in a fluidised bed ( ) inside a drying container ( ). A drying gas flows through the fluidised bed ( ) while partially de-watered sludge ( ) in granulate form ( ) is added to the fluidised bed ( ) while dried sludge ( ) is withdrawn therefrom. The granules ( ) are formed without admixture of dried substances and are granulated preferably at the same time as they are pressed. Sewage sludge may thus be dried without admixture or recycling of dried substances, so that a highly efficient plant is obtained. In addition, a granulated dry material is produced which may be used in various ways.