System for heating blast furnace gas fine desulfurization tower by using exhaust steam of deaerator

The utility model relates to a system for heating a blast furnace gas fine desulfurization tower by using exhaust steam of a deaerator, and belongs to the technical field of energy conservation and consumption reduction. According to the technical scheme, the two ends of an auxiliary steam header main pipe (20) are connected with a first auxiliary steam header (13) and a second auxiliary steam header (14) respectively, the auxiliary steam header main pipe (20) is connected with a blast furnace gas fine desulfurization tower (12) through a low-pressure steam pipeline (11), a low-pressure steam valve (15) is arranged on the low-pressure steam pipeline (11), and the first auxiliary steam header (13) and the second auxiliary steam header (14) are both closed containers with heat preservation layers. The utility model has the technical beneficial effects that the exhaust steam of the deaerator unit enters the fine desulfurization tower of the ironmaking blast furnace gas for heat exchange, so that all heat is recy