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Method for preventing jamming conditions in a compression device

United States Patent

June 18, 2002
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A compression device for feeding a waste material to a reactor includes a waste material feed assembly having a hopper, a supply tube and a compression tube. Each of the supply and compression tubes includes feed-inlet and feed-outlet ends. A feed-discharge valve assembly is located between the feed-outlet end of the compression tube and the reactor. A feed auger-screw extends axially in the supply tube between the feed-inlet and feed-outlet ends thereof. A compression auger-screw extends axially in the compression tube between the feed-inlet and feed-outlet ends thereof. The compression tube is sloped downwardly towards the reactor to drain fluid from the waste material to the reactor and is oriented at generally right angle to the supply tube such that the feed-outlet end of the supply tube is adjacent to the feed-inlet end of the compression tube. A programmable logic controller is provided for controlling the rotational speed of the feed and compression auger-screws for selectively varying the compression of the waste material and for overcoming jamming conditions within either the supply tube or the compression tube.
Williams; Paul M. (Lafayette, CO), Faller; Kenneth M. (Thornton, CO), Bauer; Edward J. (Denver, CO)
The United States of America as represented by the United States Department of Energy (Washington, DC)
09/ 837,426
April 19, 2001
FIELD AND HISTORICAL BACKGROUND OF THE INVENTION This invention was made with Government support under contract No. DE-AC04-90DP62349 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.