TUNNEL FURNACE FOR CERAMIC ITEMS Russian patent published in 2012 - IPC F27B9/00 

FIELD: heating.

SUBSTANCE: furnace comprises two opposite side walls, a horizontal roller conveyor designed to retain and move a layer of tiles inside the furnace, the first and second set of burners arranged along two side walls and facing the opposite wall. Each burner of the first set is only equipped with a nozzle to produce axial frame to heat the central zone of the tunnel. Each burner of the second set is equipped with a nozzle for radial-directed flame to heat the zone near the side wall of the tunnel. Each burner of the first and second sets is connected to the common channel for combustible gas and accordingly to the first and second channels for a substance that sustains combustion, accessories to detect discrepancies in dimensions compared to design dimensions of items that go out from the furnace, a control unit to produce data that arrive from accessories for detection, accessories for control of speed of flow of the substance that sustains combustion and arrives to the burners of the second set arranged in the second channel for the substance that sustains combustion, accessories for control of speed of flow of the substance that sustains combustion, control of which is carried out by means of an accessories control unit for adjustment in compliance with the data received from the detection accessories.

EFFECT: invention provides for efficient control of furnace operation to produce ceramic items with requested space characteristics.

11 cl, 3 dwg