Development of Carbon Capture & Storage Technology By Oxy-Combustion of Sewage Sludge and Biomass
AIChE Spring Meeting and Global Congress on Process Safety
2018
2018 Spring Meeting and 14th Global Congress on Process Safety
Environmental Division
Greenhouse Gas Reduction Technologies I
Wednesday, April 25, 2018 - 12:44am to 1:06am
Cold bed and pilot bed tests using circulating fluidized bed (CFB) were conducted to apply oxy-fuel technology for waste sludge combustion as a carbon capture and storage technology. In preliminary, the hydrodynamics of circulating fluidized bed was observed in the cold-bed setup to simulate the 30KWth CFB oxy-fuel pilot test bed, in which the superficial velocity for fast fluidization was determined over than 2.5m/s. The minimum fluidization velocity (Umf) was estimated as 0.104 m/s. In the pilot test, air and oxy-fuel combustion experiments for waste sludge and biomass were conducted with a flue-gas recirculation unit. The oxygen injection rate for oxy-fuel combustion was optimized from 21% to 25%. In 15% of flue-gas recirculation rate, carbon dioxide concentration in flue-gas was achieved over 90% of purity, which verified the possibility of oxy-fuel technology as Carbon Capture and Storage(CCS) ready technology in a CFB combustion system for burning waste sludge and biomass