Process for replacement of fossil fuels in firing of rotary lime kilns
(22) 28.09.2023
(43) 04.04.2024
(57) 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 signifi¬cantly 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 environ¬mental 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.
(71) Highbury Energy Inc., Victoria (CA)
