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Optimal control system for steel rolling heating furnace

An optimized control and heating furnace technology, applied in the general control system, control/regulation system, adaptive control, etc., can solve the problems of flue gas oxygen measurement lag, difficult optimal operation, and difficult to meet real-time performance

Active Publication Date: 2015-03-25
北京和隆优化科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the optimal oxygen content is not constant under different working conditions, it is difficult to truly achieve the optimal operation. In addition, there is a problem of measurement lag in the oxygen content of the flue gas, which makes it difficult to meet the real-time control. It is difficult to achieve the desired result by adjusting the air-fuel ratio
[0007] In summary, the existing technology still has certain limitations and defects, so the development of this system

Method used

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  • Optimal control system for steel rolling heating furnace
  • Optimal control system for steel rolling heating furnace
  • Optimal control system for steel rolling heating furnace

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Experimental program
Comparison scheme
Effect test

Embodiment

[0059] The system control block diagram is attached image 3 shown.

[0060] 1. Furnace temperature online setter

[0061] 1) Establish a production rhythm model

[0062] The production rhythm is the amount of steel tapped per unit time, and the unit is "root / hour" or "piece / hour". According to the measurement signal of the photoelectric switch used to detect the billet out of the furnace, the interval between two billets out of the furnace is calculated in real time, and the output of each billet is calculated. Hourly steel billet output R3;

[0063] R3=3600 / (t (k)-t (k-1))

[0064] t(k) is the moment when the power switch detects that a steel billet is out of the furnace, and t(k-1) is the time when the last steel billet was out of the furnace;

[0065] 2) billet type

[0066] According to the type of billet, a serial number is given at a time, such as 1, 2, 3, 4, ..., and the type of billet is used as a quantitative value. Among them, the selection of billet type req...

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Abstract

The invention discloses an optimal control system for a steel rolling heating furnace, relating to the technical field of steel rolling of a heating furnace. Firstly, an on-line furnace temperature setting device is established according to different billet types, production rhythm, billet initial temperature and billet tapping temperature; the billet tapping temperature is controlled by controlling the temperature of the furnace; based on heat efficiency models under various working conditions, the loading variation of the heating furnace is calculated and taken as a feedforward value of the furnace temperature, and the high-accuracy control on the temperature of the heating furnace under loading fluctuation is realized; and on the basis, an optimal air-fuel ratio is found by establishment of an air-fuel ratio optimal control model, so that the heating furnace achieves an optimal burning condition and the aims of saving fuel and lowering steel loss are achieved.

Description

technical field [0001] The invention relates to the technical field of optimization control of heating furnaces, in particular to an optimization control system for steel rolling heating furnaces. Background technique [0002] The steel rolling heating furnace is a heating device that uses the high-temperature flame and flue gas generated when the fuel is burned in the furnace as a heat source to heat the billet flowing in the furnace to make it reach the specified process temperature. The production and operation of the heating furnace device requires the control accuracy of the furnace temperature of the heated medium, the minimum fuel consumption and steel loss, etc. [0003] In order to achieve the above-mentioned productivity indicators of the heating furnace, the key technology in the control of the heating furnace is to adjust the furnace temperature according to the production rhythm, the temperature of the billet entering the furnace, and the temperature of the bill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 于现军李鹏
Owner 北京和隆优化科技股份有限公司
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