Pulse combustion temperature control method of heat treating furnace

A temperature control method and heat treatment furnace technology, applied in the field of heat treatment, can solve the problems of PID temperature adjustment difficulties, loss of temperature control accuracy, high temperature, etc., and achieve good dynamic response, fast dynamic response, and short adjustment time Effect

Active Publication Date: 2010-04-14
WISDRI WUHAN AUTOMATION
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Problems solved by technology

The shock caused by the large cooling when the steel billet comes and the large temperature rise after the steel billet leaves in a short period of time will bring difficulties to the PID temperature adjustment, resulting in a large overshoot, making the temperature in this area higher than the set temperature. more
In this case, the heat supply has no good precision. Regardless of the width, thickness, and le

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  • Pulse combustion temperature control method of heat treating furnace
  • Pulse combustion temperature control method of heat treating furnace
  • Pulse combustion temperature control method of heat treating furnace

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[0081] There is a continuous annealing furnace, which is divided into 12 sections and 24 zones for temperature control, and each section has two temperature control zones up and down. The first 8 sections are heating sections, and the last 4 sections are soaking sections. When no billet enters, the first eight sections adopt fuzzy PID pulse combustion control, and the last four sections adopt conventional PID pulse combustion control. Assuming that a certain steel type determines the set temperature according to the production process, the 1-2 stage is 820°C, the 3-4 stage is 850°C, the 5th stage is 870°C, the 6th stage is 890°C, the 7-12 stage is 900°C, the target furnace temperature is 900°C, no Fuzzy or conventional PID pulse regulation during billet can be used for precise temperature control.

[0082] First, formulate the control rules for heating according to the volume of the billet and the characteristics of the steel type. Take the first section and the first distric...

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Abstract

The invention relates to the technical field of thermal treatment, in particular to a pulse combustion temperature control method of heat treating furnace, which is characterized by comprising the following steps: firstly, utilizing fuzzy self-adapting PID impulse adjustment to control temperature when a steel billet does not enter the temperature control segment of a heating zone, secondly, cutting the fuzzy self-adapting PID impulse adjustment control when understanding that steel billets enter the heating zone according to the material tracing information of the heat treating furnace, and conducing thermal energy balance control, thirdly, switching to fuzzy self-adapting PID impulse adjustment to control temperature when understanding that steel billets leave off according to the material tracing information of the heat treating furnace, fourthly, always adopting the conventional PID impulse adjustment to control temperature in a soaking zone. The pulse combustion temperature control method adopts the combination of fuzzy self-adapting PID impulse adjustment and thermal balanceheat supply to control heating segments, has better temperature control precision, can control overshoot within 10 DEG C, and plays the effects of accurate temperature control, fast dynamic response and energy saving.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a temperature control method for pulse combustion of a heat treatment furnace. Background technique [0002] At present, domestic industrial furnace combustion control methods include regenerative reversing combustion, continuous conventional combustion control, etc. These combustion control methods are mostly in the form of proportional adjustment, that is, by controlling the flow of fuel and combustion-supporting air to make the temperature in the furnace, combustion The atmosphere meets the process requirements. Because this control method is often restricted by the adjustment range and measurement of fuel flow, the control effect of most heating furnaces is not good at present, mainly manifested in high energy consumption. [0003] With the continuous improvement of industrial furnaces, pulse combustion control technology has been applied to a certain extent at home a...

Claims

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Application Information

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IPC IPC(8): C21D11/00
Inventor 李阳
Owner WISDRI WUHAN AUTOMATION
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