The Experimental Study on the Desulfurization Characteristics of the 75t/h Circulating Fluidized Bed Boiler

摘要

The combustion desulfurization characteristics of one 75t/h circulating fluidized bed boiler were studied. The Longkou limestone's desulfurization efficiency is compared when the boiler burned the lignite and lean coal. The valves about the Ca/S ratio, the range of the limestone's particle size and the bed temperature that were suitable to the 75t/h CFBB were got. The change extent about the output of pre-desulfurization and post desulfurization, the bed temperature and the emission flue gas temperature were verified. The results showed that, when the Ca/S ratio is equal to 1.9, the combustion desulfurization efficiency of three type coals were all above 78 percent, so the emission of flue gas is up to scratch.