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Furnace cooling intensity control method based on vague PID control

A technology of cooling intensity and control method, used in cooling devices, adaptive control, general control systems, etc., can solve problems such as poor stability, inability to achieve precise control, and narrow application range, and improve accuracy and stability. , reduce manpower consumption, realize the effect of real-time control

Active Publication Date: 2015-09-09
马鞍山市安工大智能装备技术研究院有限公司
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Problems solved by technology

[0005] However, the temperature difference self-operated regulating valve is used to automatically adjust the water flow rate of the cooling wall according to the heat load of the cooling wall. Adapt to the complex on-site environment of the blast furnace cooling system, the stability is not good, and precise control cannot be achieved

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  • Furnace cooling intensity control method based on vague PID control
  • Furnace cooling intensity control method based on vague PID control
  • Furnace cooling intensity control method based on vague PID control

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Embodiment Construction

[0036] In order to further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings and embodiments.

[0037] In conjunction with the accompanying drawings, a blast furnace cooling intensity control method based on fuzzy PID control in this embodiment aims to control the blast furnace cooling intensity by adjusting the cooling water flow rate, maintain a constant temperature difference of the blast furnace cooling water, and maintain a balance between the cooling intensity and the blast furnace heat load. The balance between them can achieve the longevity of the blast furnace.

[0038] The heat balance equation of the stave is:

[0039] Q=Q 1 +Q 2 (1)

[0040] Q 1 =c w m f (t o -t i ) = c w vSρ(t o -t i ) = c w q w ρ(t o -t i ) (2)

[0041] In the formula, Q is the total heat transfer from the blast furnace to the stave; Q 1 is the heat taken away from the coolin...

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Abstract

The present invention discloses a furnace cooling intensity control method based on vague PID control, and belongs to the technical field of furnace cooling control. The control method is based on the heat transfer theory and the engineering thermodynamics. A novel furnace water supply cooling method is provided; a diverging three-way valve serves as an executing mechanism; advantages of conventional PID control and vague control are combined; according to nonlinearity, obsoleteness and possible uncertain factors of a furnace cooling intensity control method and operating characteristics of a furnace closed-loop soft water circulating cooling system, PID parameter self-tuning inference rules are established, and opening of the diverging three-way valve is adjusted, thereby controlling cooling wall cooling intensity; in comparison with those in the prior art, real-time control of the cooling intensity is realized, control accuracy and stability are also raised, and manpower consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of blast furnace cooling control, more specifically, relates to a blast furnace cooling intensity control method based on fuzzy PID control, and the invention is especially suitable for a blast furnace soft water closed circulation cooling system. Background technique [0002] One of the most notable features of the development process of blast furnace longevity is to try to improve the cooling capacity of the furnace cooling equipment. The continuous improvement of the cooling capacity of the blast furnace cooling equipment has extended the blast furnace life to a large extent. The conventional blast furnace cooling design adopts the "constant flow" water supply cooling method. The amount of water supplied to the cooling elements of each part of the blast furnace cannot be changed according to the specific needs of the cooling intensity. The amount of cooling water obtained by each cooling element can only ...

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Application Information

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IPC IPC(8): G05B13/04C21B7/10
Inventor 方挺贾佳
Owner 马鞍山市安工大智能装备技术研究院有限公司
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