The SO2 monitoring experiment of biomass and coal blends combustion in oxygen-enriched atmosphere was carried out on a self-built SO2 measurement system.The effects of atmosphere

blending ratio

temperature

coal type and biomass type on the SO2 release were studied.The results indicate that

in both oxygen-enriched atmosphere and air atmosphere

the SO2 instantaneous release curves of the biomass and coal mixtures showed a massive release peak and a tender release peak.With oxygen concentration of 21%

the SO2 cumulative emission in oxygen-enriched atmosphere was less than that in air atmosphere.As the oxygen concentration increased

the SO2 cumulative emission increased.As the biomass blending ratio increased

the SO2 cumulative emission showed a decreasing tendency.The SO2 cumulative emission growth at temperature range from 900 ℃ to 1 000 ℃ was higher than that at temperature range from 800 ℃ to900 ℃.The SO2 cumulative emissions of the mixtures blending corn cob with three coals decreased in different degrees.After mixing three kinds of biomass in Yangquan coal

both the two peaks in SO2 instantaneous release curves dropped and the SO2 cumulative emission decreased in different degrees.