Design And Realization Of Fuzzy Controller In Automatic Burning Of The Blaze Furnace

The technology of the blaze furnace requires the blaze furnace vault temperature in stated time and at the same time keeps the best proportion of coal gas and air all the time. The main fuel of the blaze furnace burning is coal gas. The press of it changes with high frequency; this makes the top temperature change, and then influences the temperature of the blaze in the end. So the control of the burning of the blaze furnace is the most complex control. It needs adjust the flux of the gas and the air so that it makes the best burning affection. But this makes some difficulties and larger working intension for the burning of the blaze furnace. So it's necessary to find a way to realize the best burning, reduce energy consumption, alleviate the intension of working, and improve the efficiency of the blaze furnace.The research of this paper is based on the automatic burning system of the blaze furnace of No.3 blaze furnace of Shougang Group. The originally way of burning controller adopts two loops of PLC with the control of PID. The controlled loop is very complex and the two loops influence each other. So the effect of adjusting is worse. Now this paper predigests the way of control, and uses the fuzzy control technology, designs two absolute fuzzy controller under the condition of the changing of gas pressure and the heat cost with the blaze furnace vault temperature and remaining oxygen of waste gas as the controlled target. This paper identified a fuzzy controller control rules, a reasonable choice of various input and output variables corresponding membership functions, in accordance with the process parameters and physical characteristics of the object choose the appropriate universe and to determine the scope of the relevant parameters and to determine the fuzzy and the anti-fuzzy approach. As hardware capacity constraints, we will control a hierarchical. PLC is only responsible for the input and output variables and fuzzy anti-fuzzy, Most of the fuzzy of the reasoning process completed by the top computer. And this controls the gas current and the air current which participate in the burning separately. So this promises that not only the blaze furnace vault temperature rising rapidly, but also the best proportion of burning process.This paper mainly completes the design and realization of the automatic burning system with fuzzy controller of the blaze furnace. Through commissioning on site, and achieved satisfactory results.