Pulse combustion temperature control method of heat treating furnace

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...

AI Technical Summary

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 length of the steel billet, it will almost continue to supply heat at full capacity. There is no excess heat absorbed by each billet or it is absorbed by the furnace or taken away by the furnace gas. , once the production rhythm slows down, even without heating, the furnace temperature will rise sharply, far exceeding the process setting temperature, losing the accuracy of temperature control and wasting energy

Images