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

A temperature difference control and heating furnace technology, which is applied in the direction of furnace control devices, lighting and heating equipment, furnaces, etc., can solve the problems that the control effect cannot reach the ideal level, and the temperature gradient distribution control is not available.

Active Publication Date: 2018-11-02
上海策立工程技术有限公司
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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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  • Control method of temperature difference between head and tail of billet in regenerative heating furnace
  • Control method of temperature difference between head and tail of billet in regenerative heating furnace
  • Control method of temperature difference between head and tail of billet in regenerative heating furnace

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0037] During the process of billet heating, the operator lacks information on the temperature distribution of the billet in the furnace. Therefore, the temperature difference between the head and the tail of the billet can only be indirectly known through the temperature feedback curve of the mid-rolling after it is released from the furnace. In this case, due to the heterogeneity of the heating process of the billets, it cannot be guaranteed that the temperature distribution of the head and tail...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D19/00
CPCF27D19/00F27D2019/0034F27D2019/0093
Inventor 王贇吕刚李响
Owner 上海策立工程技术有限公司
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