The invention relates to a
flue gas desulfurization method of a heating boiler and a device thereof, belonging to the technical field of heating boilers. The
flue gas desulfurization method of the heating boiler comprises the following steps of: precooling, desulfurizing,
magnesium oxide pulping, absorption liquid
aeration and crystallizing
dehydration. In the precooling step, glue gas enters a precooling
tower through a
flue gas
inlet channel for precooling, and absorption liquid is atomized and sprayed; in the desulfurizing step, the
flue gas enters a desulfurizing
tower for desulfurizing, and the absorption liquid is atomized and sprayed; the
flue gas is discharged through a
chimney; in the step of
magnesium oxide pulping,
magnesium oxide powder is pulped in a
digestion tank; in the step of absorption liquid
aeration, an
air blower carries out
aeration on the absorption liquid by a gas distribution
pipe; and in the step of crystallizing
dehydration, magnesium
sulfate crystal size is crystallized and dehydrated. The
flue gas desulfurization device of the heating boiler is characterized in that the flue gas
inlet channel is communicated with the precooling
tower by a draught fan; the precooling tower is communicated with the desulfurizing tower through a flue; the desulfurizing tower is communicated with the
chimney; an absorption liquid atomization spray mechanism is respectively arranged in the precooling tower and the desulfurizing tower; the
air blower is communicated with an aeration gas distribution
pipe; a circulating
water pool is communicated with a dehydrator; and a spray
circulating pump is communicated with the
digestion tank. The invention has the advantages of good desulfurizing effect, high desulfurizing efficiency, little water along with flue gas
discharge, convenient operation,
environmental protection and the like.