PROCESS SYSTEM FOR PERFORMING DRY DESULFURIZATION ON FUME OF PELLET FUEL BOILER

摘要

A process system (100) for performing dry desulfurization on fume of a pellet fuel boiler. The system comprises: a pellet fuel boiler (1) defining a hearth (11); a regenerative rotating commutating heater (2); a first fume passage (3), wherein an inlet end of the first fume passage (3) is communicated with a top portion of the hearth (11), and an outlet end of the first fume passage (3) is communicated with the regenerative rotating commutating heater (2), so that fume is delivered into one of at least paired accommodating portions (25) of a heat exchanger main body (21) and exchanges heat with a heat carrier (23) accommodated in the accommodating portion (25); an air passage (4), used for delivering air at least into the other one of the paired accommodating portions (25) of the heat exchanger main body (21), so that a heat carrier (23) accommodated in the accommodating portion (25) exchanges heat with air, and the air after heat exchange is supplied into the hearth (11); and a WCFB fume desulfurization device (5). By means of the pellet fuel boiler and the dry desulfurization process system, the fume exhaust temperature is low, the boiler has high efficiency, the process is optimized, the cost is saved, and the influence of corrosion is lowered.