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    • 6. 发明专利
    • CONTROL METHOD OF FURNACE TEMPERATURE OF COKE OVEN
    • JPH01278596A
    • 1989-11-08
    • JP10728988
    • 1988-04-28
    • NIPPON STEEL CORP
    • TANAKA KEIHACHIROKAMIO SUSUMUSHIHARA YASUTAKASATO TAKASHI
    • F23N5/10C10B21/10C10B35/00G05D23/00G05D23/19G05D23/24
    • PURPOSE:To control furnace temperature in a programmed heating operation by changing according to previously fixed furnace temperature pattern of combustion chamber, in every stage of carbonization process from feeding of coal into oven to extrusion. CONSTITUTION:A finite time adjusting observer estimating a state quantity of furnace temperature process using a response delay time between flow quantity of fuel gas and furnace temperature in combustion chamber, the flow quantity of fuel gas and the furnace temperature in combustion chamber, a feedback action term of the estimated state quantity and an integral action term as a foregoing element in main loop are previously fixed and installed. Atmospheric temperature (furnace temperature) in the combustion chamber is detected by plural PR thermocouples installed in upper side of hair-pin part in the combustion chamber and an average value is calculated, then data treatment smoothing change of the average value with time is performed and a furnace temperature to be controlled is calculated, thus a setting furnace temperature in future same as the response delay time is foreseen and the estimated value of a state quantity obtained by the finite time adjusting observer is fed back and flow quantity of fuel gas is controlled.