METAL HEATING DEVICE Russian patent published in 1999 - IPC

FIELD: heating equipment. SUBSTANCE: device has furnace with door, air ducts, which are located on side walls of furnace on its outside, horizontal furnace wall, fire bar and ash pit which are located in furnace. Air ducts are designed as cylindrical jackets which are shifted with respect to axis of cylindrical furnace and are finished with heat-air distribution grid. Furnace wall is removable. Furnace is equipped with special rotating fire bar. In addition ash pit has drawing box and gas burner. Furnace door is air-tight and is equipped with tube with fuel-air supplying channel and is disconnected by means of drop burner. EFFECT: increased reliability, facilitated use, possibility to use arbitrary fuel, increased efficiency, simplified manufacturing, decreased amount of raw material, increased safety. 2 dwg