METHOD FOR IMPROVING GASIFICATION EFFICIENCY THROUGH THE USE OF WASTE HEAT
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United States of America Patent
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Issued Date -
Sep 27, 2007
app pub date -
Mar 23, 2007
filing date -
Mar 24, 2006
priority date (Note) -
Abandoned
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Abstract
A method for recycling the waste heat generated from an external process, which is fuelled by syngas, into a gasification process to enhance the energy density of the syngas produced as well as the overall gasification efficiency of the system. A method is provided for utilizing the waste heat contained in a stream exiting in the syngas fueled process to vaporize water and produce steam. The steam is then upgraded by first exchanging energy with the hot syngas exiting the gasifier and then within the gasifier itself to a temperature where significant steam gasification of the biomass occurs. The process within the gasifier is driven by introducing a small amount of air into the gasifier such that some biomass is directly combusted to provide the heat required by the process.
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