Self-preheating-type high-temperature oxidation smoke exhaust hood

A self-preheating-type high-temperature oxidation smoke exhaust hood mainly comprises a circular truncated cone tubular furnace top cover (1), an outer round pipe (2), an inner round pipe (3), a cylinder tubular smoke exhaust pipe (4), a circular-ring-shaped middle retaining plate (5) and a circular-ring-shaped bottom retaining plate which share a central axis. An inner cavity of the furnace top cover (1) is communicated with that of the smoke exhaust pipe (4), the inner round pipe (3) is disposed in the outer round pipe (2), the smoke exhaust pipe (4) is disposed in the inner round pipe (3), multiple seam-shaped inclined air inlets (11) are uniformly arranged on the circumference of a side wall face of the furnace top cover (1), and multiple narrow round holes (31) with central axises vertically intersected with the central axis of the smoke exhaust pipe (4) are uniformly formed on a side wall face of the inner round pipe (3). The self-preheating-type high-temperature oxidation smoke exhaust hood is compact