Method for intelligently controlling temperatures of furnaces and kilns

Abstract

The invention discloses a method for intelligently controlling the temperatures of furnaces and kilns. The method includes acquiring kiln head output values by means of speed change (fuzzy) PID (proportion, integration and differentiation) operation according to feedback temperatures of kiln heads of the rotary kilns; outputting the kiln head output values to coal scales of the kiln heads and controlling coal injection rates of coal of the kiln heads to be within certain ranges; acquiring set values of speed change (fuzzy) PID temperatures, namely, actual set temperatures of the decomposing furnaces, by means of operation by the aid of temperature control subsystems of the decomposing furnaces; computing errors and error change rates by the aid of feedback temperatures of outlets of the decomposing furnaces and the actual set temperatures of the decomposing furnaces, acquiring speed change PID (fuzzy) values by the aid of the computed errors and the computed error change rates, and acquiring output values of the decomposing furnaces by means of speed change (fuzzy) PID operation according to the feedback temperatures of the outlets of the decomposing furnaces; outputting the output values of the decomposing furnaces to coal scales of the decomposing furnaces and controlling coal injection rates of the decomposing furnaces to be within certain ranges.

Description

Technical field [0001] The present invention relates to the technical field of cement furnace control, in particular to a furnace temperature intelligent control method. Background technique [0002] Domestic and foreign cement furnaces and various smelting rotary kiln electrical control systems are generally controlled by manual fire watching. Manual control methods have very poor control accuracy and operational stability. Therefore, I combine many years of electrical control experience. As well as the understanding and summary of each furnace process, and the experimental experience of major domestic furnaces, specially invented an intelligent control method and process that is not available at home and abroad. The control process is fully automatic artificial intelligence control. . Since most of the fuel in each furnace uses coal as the fuel, the reaction speed of coal combustion is slow, and the temperature control is relatively lagging. Summary of the invention [0003] T...

AI Technical Summary

Problems solved by technology

[0002] The control operation mode of electric control system of cement kiln and various smelting rotary kilns at home and abroad is generally manual fire control, manual control mode, its control accuracy and operation stability are very poor, so I combine many years of experience in electrical control, As well as the understanding and summary of each kiln process, as well as the experimental experience in major domestic kilns, a special intelligent control method and process that is not available at home and abroad, the control process is fully automatic artificial intelligence control

Since most of the fuel in each kiln is coal as fuel, and the reaction speed of coal combustion is slow, the control of its temperature is lagging behind.

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