Tail gas treatment device in process of preparing acid from smelting flue gas

The invention discloses a tail gas treatment device in smelting flue gas acid making, which comprises a reaction tower, a first pipeline and a second pipeline, the reaction tower is a container for sulfur dioxide and hydrogen sulfide gas to react, the first pipeline and the second pipeline are respectively arranged in the reaction tower, the first pipeline is used for inputting sulfur dioxide gas, and the second pipeline is used for inputting hydrogen sulfide gas. The second pipeline is used for inputting hydrogen sulfide gas, circulating liquid is arranged at the bottom of the reaction tower, a first flushing nozzle is arranged at the top of the reaction tower, the circulating liquid is communicated with the first flushing nozzle through a circulating pipeline, and a first circulating pump is arranged in the circulating pipeline; by inputting sulfur dioxide and hydrogen sulfide into the reaction tower, the sulfur dioxide and the hydrogen sulfide react in the reaction tower to generate elemental sulfur and wa