PROCESS FOR REPLACEMENT OF FOSSIL FUELS IN FIRING OF ROTARY LIME KILNS
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United States of America Patent
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Issued Date -
Apr 4, 2024
app pub date -
Sep 28, 2023
filing date -
Sep 30, 2022
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Abstract
A method and system for the generation of a medium-Btu, clean and renewable fuel gas to replace fossil fuels in existing lime kilns with minimal retrofitting without significantly compromising the kiln capacity. A steam-blown dual fluidized bed gasifier produces renewable fuel gas from a carbonaceous feedstock such as woody biomass. A gas cleanup process purifies the raw fuel gas, resulting in a clean fuel gas for mitigation of lime contamination and environmental issues. The adiabatic flame temperature and flue gas volume/GJ for the combustion of the renewable fuel gas are similar to values for natural gas, making retrofitting of fossil fuel-fired lime kilns relatively straightforward.
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