Modularized dry desulfurization system

A modular dry desulfurization system relates to the technical field of flue gas desulfurization and comprises an induced draft fan, an air supply pipe, a plurality of desulfurization units and an exhaust pipe, each desulfurization unit comprises a barrel and a desulfurizer module arranged in the barrel, and a power sealing door is arranged at a top outlet of the barrel. An air inlet in the lower portion of the barrel is connected with an air supply pipe through a bypass air pipe with a first valve, an air outlet in the side face of the upper portion of the barrel is connected with an exhaust pipe through a bypass exhaust pipe with a second valve, the desulfurizing agent module comprises a loading frame matched with an inner cavity of the barrel in appearance and a desulfurizing agent arranged in the loading frame, and a bearing net is arranged at the bottom of the loading frame. The desulfurizing agent in the loading frame is supported and is prevented from leaking from the bottom of the loading frame. Compar