Vertical composite cylindrical RTO incinerator

The utility model discloses a vertical composite cylindrical RTO incinerator which comprises an incinerator body, the incinerator body is of a vertically-arranged cylindrical structure, a cinder valve is arranged at the bottom of the incinerator body, and the cinder valve is communicated with a hearth. A first fire grate and a second fire grate are sequentially arranged in the hearth from bottom to top; a waste gas flue, a burner I mounting port and a combustion-supporting air connecting pipe I are mounted on the side wall of the furnace body below the first fire grate; a combustion-supporting air connecting pipe II, a combustor II mounting opening, a fire observation hole and a gravity explosion door are mounted on the side wall of the furnace body between the first fire grate and the second fire grate; an inspection door is mounted on the side wall of the furnace body above the second fire grate; a turning flue is mounted at the top of the furnace body and is communicated with the hearth; the turning flue i