Intelligent control system and method for combustion process of hot-blast stove

Abstract

The invention provides an intelligent control system for a combustion process of a hot-blast stove. The system comprises an expert-coordinated controller, a rapid heating period air-fuel ratio optimization fuzzy controller, a dome temperature management period air-fuel ratio optimization fuzzy controller, a flow-given calculation module and a flow fuzzy expert controller, wherein the expert-coordinated controller is used for identifying the combustion state and selecting fuzzy controllers at different combustion stages; the rapid heating period air-fuel ratio optimization fuzzy controller is used for outputting the adjustment increment of the air-fuel ratio in the rapid heating period; the dome temperature management period air-fuel ratio optimization fuzzy controller is used for outputting the adjustment increment of the air-gas flow ratio in the dome temperature management period; the flow-given calculation module is used for calculating a gas flow set value and an air flow set value; the flow fuzzy expert controller adopts a feedback and feedforward control strategy and adjusts the valve flow characteristic according to the ideal state, a feedback link adopts a fuzzy control strategy, meanwhile, feedforward compensation is performed on pressure disturbance by the aid of the feedback link, and optimized control of the flow is realized. With the adoption of the system, optimized control of the gas flow and the air-fuel ratio in the combustion process is realized, combustion is optimized, and energy is saved.

Description

technical field [0001] The invention belongs to the field of blast furnace system control, in particular to an intelligent control system and method for the combustion process of a hot blast stove. Background technique [0002] In iron and steel enterprises, the hot blast stove is one of the important equipment in the blast furnace ironmaking production, which provides high temperature hot air for the blast furnace. Years of production practice has proved that increasing the blast temperature is an effective measure to increase the utilization factor, reduce the coke ratio and increase the amount of coal injection in the process of blast furnace ironmaking. Optimizing the operation of the hot blast stove combustion process can improve the thermal efficiency and air supply temperature of the hot blast stove, reduce the energy consumption per unit of hot blast, and prolong the service life of the hot blast stove, which has great practical significance for blast furnace ironmak...

AI Technical Summary

Problems solved by technology

Since the heating and combustion system of the hot blast stove is a multivariable system with highly nonlinear, time-varying characteristics, violent disturbance changes and large amplitudes, and it is difficult to establish an accurate mathematical model, it is difficult to meet the control requirements by using traditional classical control methods. A new intelligent optimization control method is adopted to solve this problem

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