Abstract: A heating furnace is provided to use for medium and small size incinerator, to control air pollution effectively using waste heat generated from the incinerator and not to require large size equipment. The heating furnace includes a first opening for inserting disposal material, a second opening communicating with a furnace body being capable of heating the disposal material, a heat flow passage formed between the first opening and the second opening, and a heating tube having receiving means, the receiving means receiving the disposal material into the heat flow passage and at the same time dropping the disposal material into the furnace body during the rotation. A motor is connected to the furnace body to obtain electric power by heat generated from the furnace body.

Abstract: A preheater in an incineration system consists of: a first opening through which refuse is input; a second opening which is formed under the first opening and communicates with an incinerator; a heat flow passageway which is formed between the first and second openings, and passes the heat generated by the incinerator; and a receiving unit between the two openings which rotates the refuse in the heat flow passageway.