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:
Aug. 28, 2018
Filed:
Jun. 02, 2009
Louis Schmit, Luxembourg, LU;
Georges Stamatakis, Canach, LU;
Guy Junk, Ettlebruck, LU;
Claude Junk, Vianden, LU;
Benoît Junk, Ettelbruck, LU;
PAUL WURTH S.A., Luxembourg, LU;
Abstract
Method for producing pulverized coal, the method comprising the steps of heating a drying gas, preferably an inert gas, in a hot gas generator () to a predefined temperature; feeding the heated drying gas into a pulverizer (); introducing raw coal into the pulverizer (), the pulverizer () grinding the raw coal to pulverized coal; collecting a mixture of drying gas and pulverized coal from the pulverizer () and feeding the mixture to a filter (), the filter () separating the dried pulverized coal from the drying gas; and collecting the dried pulverized coal for further use and feeding part of the drying gas from the filter to a recirculation line () for returning at least part of the drying gas to the hot gas generator (). According to an important aspect of the present invention, the method comprises the further step of controlling an exit temperature of the mixture of drying gas and pulverized coal exiting the pulverizer () by controlling a volume of water injected into the heated drying gas before feeding it into the pulverizer ().