The invention discloses a device and method for
magnesium process
flue gas desulfurization. The device comprises a multi-stage cross flow-reverse flow rotating filling
bed absorption device, wherein an
exhaust pipe is arranged on the top of the rotating filling
bed absorption device; a liquid
discharge pipe is arranged at the bottom; a liquid inlet
pipe is connected with the side surface of the upper side; an air inlet
pipe is connected with the side surface of the lower side; a rotating shaft is arranged inside the rotating filling
bed absorption device; two filling material rotors or more are arranged on the rotating shaft; a filling material
stator is arranged between the two adjacent rotors; a liquid
distributor is arranged in the center of the filling material rotor and is connected with the liquid inlet pipe; the lower end of the rotating shaft extends to the outside of an absorption device to be connected with a
frequency modulation motor; the gas inlet pipe of the rotating filling bed absorption device is connected with a SO2-containing
smoke gas pipeline; a liquid inlet pipe of the rotating filling bed absorption device is connected with a
magnesium hydrate storage groove;the liquid
discharge pipe is connected with a
magnesium bisulfite storage groove. The method has the advantages that a magnesium
hydroxide desulfurizer is used for wet process desulfurization; the purification degree, and the speed in the desulfurization process and the desulfurization efficiency are improved; the
smoke gas ultra-low
discharge standard can be reached by single piece of equipment.