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Oxycombustion in transport oxy-combustor

United States Patent

April 8, 2014
View the Complete Patent at the US Patent & Trademark Office
A pressurized transport oxy-combustor with different configurations is disclosed. Substantially pure oxygen is fed to the transport oxy-combustor under pressure to combust fossil fuels, generating steam for power generation. The end product is the flue gas containing substantially pure CO.sub.2 after moisture condensation. The low excess oxygen necessary to achieve complete combustion in the combustor is scavenged by adding another fuel so that substantially all oxygen fed to the combustor is completely consumed. The capability to operate the transport oxy-combustor as a circulating fluidized bed combustor at very high solids circulation rates makes it unnecessary to use recycled CO.sub.2 or flue gas as a means to moderate and control the combustion temperature. The temperature in the combustor is effectively controlled by relatively cooler circulating solids that enter the combustion zone. A small amount of CO.sub.2 is recycled for aeration and to convey solids fuel to the combustor.
Vimalchand; Pannalal (Birmingham, AL), Liu; Guohai (Birmingham, AL), Peng; WanWang (Birmingham, AL)
Southern Company (Birmingham, AL)
13/ 405,312
February 26, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with some Government support under Cooperative Agreement Number DE-NT0000749 awarded by the United States Department of Energy. The Government has certain rights in this invention.