CONTROLLING METHOD FOR HEATING FURNACE

PURPOSE:To control the temp. of the work to prescribed values without repeating the putting out and ignition of burners in a heating furnace wherein the work and high temp. gases are flowed counter currents in the plural zones provided with burners by controlling the combustion rates of a specific z...

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Bibliographische Detailangaben
Hauptverfasser:	SENBA TADAO, HASHIZUME YOSHIYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL KILNS LIGHTING MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS OPEN SINTERING OR LIKE APPARATUS OVENS RETORTS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To control the temp. of the work to prescribed values without repeating the putting out and ignition of burners in a heating furnace wherein the work and high temp. gases are flowed counter currents in the plural zones provided with burners by controlling the combustion rates of a specific zone. CONSTITUTION:In a nonoxidative heating furnace 1, high temp. gases generated by burners 5 are flowed in the direction Y opposite from the advancing direction of the work W. A selector 20 determines a combustion zone number N by the calculation from heating condition data, and in the case of N=3, switches 9 are changed over like the figure. In zones 34, 35, the burners 5 are put out. In zones 31-33, the output of a work temp. controller 8 is applied as an equal quantity signal to a heating controller 10 for respective zones, and in accordance with the output of an IR thermometer 7, the combustion rates of the burners 5 in the respective zones are controlled. The work temp. is controlled to prescribed values by this. it is equally well to burn at the max. combustion rate only in the zone 31 and to use the zones 32, 33 as control zones.