Desulfurizer

The utility model discloses a desulphurization device which comprises a desulphurization tower. The desulphurization tower is provided with a smoke gas inlet and outlet; the bottom of the desulphurization tower is provided with a bottom mixer; the upper part of the bottom mixer is provided with at least one layer of upper mixer. The mixer is provided with an upper mixer above the bottom mixer. Working of at least two layers of mixers can obviously improve the mixing efficiency of systems so that the mixing of materials is more even and the oxidation efficiency is higher, thereby improving the desulphurization and denitrification efficiency of the whole system. When sediment is existed at the bottom, the upper mixer can be operated to drive the lower material to move by vortex and the bottom mixer can be started after the material is loose so that the system failure resulting from the aterial pile agglomeration at the bottom of the desulphurization tower is solved and the reliability of system operation is imp