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:
Jan. 31, 1978
Filed:
Aug. 17, 1976
Carl Hafke, Frankfurt, DT;
Rudolf Kohlen, Wehrheim, DT;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DT;
Abstract
In a process of gasifying solid fuel such as coal comprising the steps of contacting the solid fuel under a pressure of at least about 5 bars in a reaction chamber surrounded by a water-cooled zone, the reaction heat evaporating water in said zone, transferring the water vapor from said zone to the reaction chamber, removing product gas from the reaction chamber, scrubbing and cooling said product gas in a scrubber-cooler, and periodically interrupting normal gasification, the improvement which comprises discontinuing the transfer of water vapor to the reaction chamber during such periods of other than normal gasification and instead transferring the water vapor to said scrubber-cooler, whereby generation of product gas will be discontinued during such periods. Hot steam may be supplied to the water-cooled zone during said periods of interruption to delay a drop in the temperature of the fuel in the reactor chamber so that upon resumption of normal operation the initially produced gas wll be of substantially normal composition.