Large hot-air furnace with reflective arch energy secondary burning

The utility model relates to a large secondary burning hot-air furnace with the reflective arch and energy, which comprises a combustion device and a heat exchanging body. The combustion device and the heat exchanging body are connected into integration by a flange. The external shape of the hot-air furnace is an ellipse, and has the advantages of sufficient fuel combustion, few fume, high heat efficiency, fuel saving, long service life, compact structure, small size, convenient operation, safety, etc. The heat efficiency reaches 80 percents. The hot-air temperature is between 100 and 350 DEG C. The maximum heat supplied quantity reaches 2400 multiply 10 KJ/h.