POWDERED SOLID FUEL BOILER AND DRY PURIFICATION PROCESS SYSTEM

摘要

A powdered solid fuel boiler and a dry purification process system (100). The powdered solid fuel boiler (1) comprises: 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), wherein a part of the fume after desulfurization is re-circulated into a second fume passage (101). By means of the powdered solid fuel boiler and the dry purification process system, the fume exhaust temperature is reduced; the efficiency of the boiler, the desulfurization efficiency, and the fume purification rate are improved; and the influence of corrosion is lowered.