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Process to improve boiler operation by supplemental firing with thermally beneficiated low rank coal

United States Patent

December 4, 2001
View the Complete Patent at the US Patent & Trademark Office
The invention described is a process for improving the performance of a commercial coal or lignite fired boiler system by supplementing its normal coal supply with a controlled quantity of thermally beneficiated low rank coal, (TBLRC). This supplemental TBLRC can be delivered either to the solid fuel mill (pulverizer) or directly to the coal burner feed pipe. Specific benefits are supplied based on knowledge of equipment types that may be employed on a commercial scale to complete the process. The thermally beneficiated low rank coal can be delivered along with regular coal or intermittently with regular coal as the needs require.
Sheldon; Ray W. (Huntley, MT)
Western Syncoal, LLC (Billings, MT)
09/ 692,937
October 20, 2000
This invention was made with Government support under Contract No. DE-FC 22-89PC89664 awarded by the Department of Energy. The Government has certain rights in this invention.