Control method of temperature difference between head and tail of billet in regenerative heating furnace

Abstract

The invention provides a control method for temperature difference of blanks at head and tail for a regenerative heating furnace. The method comprises the following steps of: S1, solving a furnace temperature adjustment amount deltaTfur at the current temperature according to the difference deltaT of head average temperature of the blank and the tail average temperature of the blank, wherein the temperatures of the blanks at the head and tails are consistent; and S2, prolonging a combustion time to the side where the furnace temperature needs to be increased according to the furnace temperature adjustment amount deltaTfur, and meanwhile, correspondingly shortening the combustion time for the combustion side corresponding to the side where the furnace temperature needs to be increased. A blank two-dimensional temperature model-based heating furnace combustion optimal control strategy can adjust the current heating strategy dynamically in real time according to the actual temperature distribution condition of the blanks and change the combustion of a nozzle of the heating furnace, so that an effect of precisely controlling the tapping temperature difference of the blanks at the head and tail is obtained.

Description

technical field [0001] The invention relates to a regenerative heating furnace, in particular to a method for controlling the temperature difference between the head and the tail of a billet in a regenerative heating furnace. Background technique [0002] At present, due to the special production of some production lines, the need for common heating of rebar and round bars is taken into account. Therefore, when controlling the temperature difference in the length direction of the billet from the furnace, it is necessary for the heating furnace to formulate different temperature gradient distributions according to different billet specifications and rolling systems. In the paper titled "Elimination of Temperature Difference in Furnace Width Direction under Low Load of Regenerative Reheating Furnace", the technology for eliminating temperature difference in furnace temperature under low load is proposed. This technology has a good effect on the temperature of discharged billet...

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Problems solved by technology

In the paper titled "Elimination of Temperature Difference in Furnace Width Direction under Low Load of Regenerative Reheating Furnace", the technology for eliminating temperature difference in furnace temperature under low load is proposed. This technology has a good effect on the temperature of discharged billet under low load uniformity control; however, there is no corresponding solution for the temperature gradient distribution control of different requirements

In the paper titled "Retrofit of Combustion System of Regenerative Heating Furnace", the combustion method of regenerative heating furnace was discussed, and a fine-grained billet temperature control strategy was proposed using the process control system. However, the control effect not yet ideal

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