SYSTEM FOR MEASURING TEMPERATURE IN A FURNACE AND METHOD FOR CONTROLLING COMBUSTION INSIDE THE SAME

The invention refers to a system for measuring the temperature inside a furnace and to a method for controlling the combustion in the furnace. The combustion comprises a vessel that defines a heating chamber in which a material is to be heated, an openable door, at least one burner configured to burn a fuel and a gaseous oxidant, each burner generating a flame inside the heating chamber that heats the material and a flue through which an exhaust flame extends out of the heating chamber. The system comprises at least one multi-wavelength pyrometer coupled to the furnace wherein the multi-wavelength pyrometer is oriented towards a portion of a refractory lining of the heating chamber not in direct contact with the heated material. The multi-wavelength pyrometer is configured to measure the temperature of the corresponding portion of the refractory lining during operation of the furnace.