Method for controlling furnace temperature of multi-zone heating

Details Method for controlling furnace temperature of multi-zone heating Method for controlling furnace temperature of multi-zone heating

1979-04-10

1981-03-10

Camby, John J.

Heating

Processes of heating or heater operation

Controlling flame position or work atmosphere

266 80, 266 90, 432 36, F27D 700

Patent

active

042551331

ABSTRACT:
A method for controlling furnace temperatures of a multi-zone heating furnace having a feedback control system for detecting and inputting a furnace temperature and a furnace temperature setting device or a combustion control computer of the type for determining an optimum furnace temperature for each slab and outputting it as a set point to said feedback control system, the method comprising the steps of determining, under predetermined limit conditions which are required for the operations of the furnace, a furnace temperature pattern or a slab temperature rise curve which may minimize the overall flow rate of fuel, heating the furnace along the furnace temperature pattern or the slab temperature rise curve which is determined, reducing, in response to the instruction for suspending the discharge of slabs from the furnace, the flow rate of fuel to be supplied to the furnace to a predetermined level, and heating the furnace along a new slab temperature rise curve which is obtained by shifting the steady state slab temperature rise curve by a slab discharge suspension period, thereby making the slab temperature when the slab discharge is resumed equal to the slab temperature when the slab discharge suspension instruction is received.

REFERENCES:
patent: 3604695 (1971-09-01), Steeper

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