The utility model discloses a desulfurization reactor convenient to replace desulfurizer, and the reactor aims at solving the technical problem of reducing production efficiency and increasing maintenance cost when desulfurizer is invalid under the prior art, and needs to stop and dismount the reactor to replace. The reactor includes liquid desulfurization bucket, and the top of liquid desulfurization bucket is provided with horizontal
solid desulfurization box, and the inside of horizontal
solid desulfurization box is provided with two rectangular mounting boxes, and the inside of rectangular mounting box is provided with detachable dry desulfurization
assembly, through setting two groups of switchable dry desulfurization
assembly, cooperate rotatable rectangular sealing plate, make when replacing a group of dry desulfurization
assembly, another group still can normally work, ensure that desulfurization process is uninterrupted, improve production efficiency, and the design of rectangular sealing plate ensures that the gas passage in rectangular mounting box is always in
closed state in the switching process, prevents untreated
flue gas leakage, guarantees desulfurization efficiency and
environmental protection standard.