Catalytic flue gas desulfurization tower

The utility model discloses a catalytic flue gas desulfurization tower, aiming at solving the technical problem that the emission of gas generated in a regeneration liquid tank is not easy to monitor. Comprising vertically arranged desulfurization reactors; an air inlet pipe network; the exhaust pipe network comprises a vertically arranged exhaust main pipe and exhaust branch pipes for connecting the exhaust main pipe with the exhaust ports of the desulfurization reactors respectively; a regeneration liquid circulation system; the at least one regeneration liquid tank is of a closed structure and is provided with a top exhaust channel; the top exhaust channel is connected to the exhaust pipe network through a pipeline. And the top exhaust channel is connected to the exhaust pipe network through a pipeline, so that gas generated in the regeneration liquid tank is finally intensively exhausted through the exhaust main pipe. By means of the existing technical means, centralized emission of the exhaust manifold c