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:
Nov. 20, 1979
Filed:
Aug. 30, 1977
Wolfgang Rohde, Essen, DE;
Bergwerksverband GmbH, Essen, DE;
Abstract
Coal is dried by passing it successively to two tubular flow-through circulation heating elements together with a heat carrier gas, withdrawing the partially dried coal emanating from the first heating element and passing it into the inlet end of the second heating element and recovering the substantially dry coal from the gas and coal mass emanating from the second heating element, the hot vapors received from the outlet end of the first heating element being recirculated after mixing them with fresh combustion gases into the second heating element and the heat carrier gas emanating from the second heating element after separation of the coal therefrom being passed after mixing with fresh combustion gases into the first heating element.