Incinerator primary air device capable of adjusting temperature in segmented mode

The utility model discloses a segmented temperature-adjustable incinerator primary air device, and belongs to the technical field of waste incineration. An air suction opening of the cold air suction pipeline is connected with the cold air suction pipeline, the cold air suction pipeline is connected with the primary air steam-air preheater, the other end of the primary air steam-air preheater is connected with a primary air hot air main pipe, the other end of the primary air hot air main pipe is connected with a primary air hot air branch pipe, and the primary air hot air branch pipe is provided with an adjusting valve. The primary air and hot air branch pipe bypass exhaust inlets are connected with primary air and hot air branch pipe bypass pipelines respectively, the primary air and hot air branch pipe bypass pipelines are provided with adjusting valves, the other ends of the adjusting valves are connected with primary air and hot air branch pipe pipelines, and the other ends of the primary air and hot air