Method of controlling temperature of high-temperature ring annealing furnace

Abstract

The invention discloses a temperature control method of a high ring annealing furnace controlling the furnace temperature according to the different behavior, which comprises the following steps: applying the low burning control method after opening the door of the furnace in order to save the energy and protect the equipment. The invention is characterized by the following: transmitting separately the output signal of the furnace temperature adjuster in the control system to a high selector and a low selector which controls a gas relief valve and an air valve through a flow regulator and the other input of which is a computational value detected by the flow regulator according to the normal single cross limiting amplitude control means; when opening the furnace door, equipping the output signal of the furnace temperature adjuster with the low burning fixed value; when closing the furnace door, equipping the output signal of the furnace temperature adjuster with a behavior burning fixed value, wherein 5 DEG C between the equipped value of the furnace temperature adjuster and the detected value of the furnace temperature adjuster; the output signal of the furnace temperature is equipped with the burning fixed value after recovering the low burning.

Description

technical field [0001] The invention relates to a method for controlling the furnace temperature of a high-temperature annular annealing furnace. Background technique [0002] The high-temperature annular annealing furnace is a heating furnace used for high-temperature annealing of steel. The temperature detection element detects the temperature of the heating furnace. The detected temperature value is input into the control system through the thermocouple input module. The air and gas flow detection element detects the flow rate of the medium pipeline. The flow value is input to the control system through the analog input module, and the control program processes the detected furnace temperature value, flow value, and furnace door lifting signal to calculate and output the control value, and the output control value is output to the gas and air flow adjustment through the analog output module. The element controls the flow of the energy medium pipeline. During the producti...

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Problems solved by technology

During the production of the high-temperature annular annealing furnace, the furnace door of the sealed heating furnace must be lifted and the hearth rotated every once in a while. After the furnace door is lifted, a large amount of heat is lost, and the heat balance of the heating furnace is destroyed. Due to the large volume delay of the controlled object , the furnace temperature control is controlled by the existing PID method, the maximum dynamic deviation is large, and the adjustment time is long, which affects the quality of the processed product and wastes energy; The furnace door is damaged and cannot meet the production requirements

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