High-efficiency integrated furnace for generating overheated steam and hot air

Provided is a high-efficiency integrated furnace for generating overheated steam and hot air. The high-efficiency integrated furnace for generating the overheated steam and the hot air comprises an independent upper furnace body, an independent lower furnace body, overheating pipes and the like, wherein the upper furnace body is made of metal materials in a welded mode, a flue gas channel is composed of a flue gas collecting pipe, an upper flue, a flue gas pipe, a lower flue and a flue gas guiding opening, the flue gas pipe is installed in a preheating air flue, a hot air flue is arranged in the innermost layer of the upper furnace body, a separating layer is formed between the hot air flue and the preheating air flue, an overheating pipe is installed at the upper end of the lower furnace body, a steam inlet and an overheated steam inlet are installed in the lower furnace body, a heat insulation device is arranged in a hearth of the lower furnace body, and the upper furnace body and the lower furnace body are