Multi-stage matching optimization method of operating parameters in blast furnace hot blast stove firing process

Abstract

The invention proposes a multi-stage matching and optimization method for operating parameters in a blast furnace hot blast stove firing process. Based on the analysis of the influence of the air-fuel ratio setting value in the furnace process on the furnace working conditions and air supply results, the method constructs state parameters (vault temperature, flue gas temperature, vault temperature change rate, flue gas temperature change rate, gas Pressure, air pressure and air-fuel ratio) and operating parameters (gas valve opening and air valve opening) historical database, put forward an energy efficiency evaluation method for hot blast stove firing process combined with air supply results, and excavate excellent furnace firing times. Integrate the density peak fast search clustering and correlation analysis methods to establish a pattern matching space, perform multi-stage matching according to the similarity measurement of state parameters, and search for the optimal operating parameters in each stage of the furnace, so as to save gas consumption and improve gas delivery. The purpose of controlling the wind temperature and ensuring the duration of the air supply.

Description

technical field [0001] The invention relates to the technical field of optimization and control of blast furnace hot blast stoves, in particular to a method for optimizing operation parameters of blast furnace blast stove burning process by sub-period and multi-level matching. Background technique [0002] Large-scale hot blast stove is one of the important components of modern blast furnace ironmaking system, which mainly provides continuous and stable high temperature hot blast for blast furnace. According to statistics, for every 100℃ increase in hot air temperature, the tuyere combustion temperature can be increased by 20-300℃, the production can be increased by 3%-5%, the coke ratio can be reduced by 4%-7%, and the pulverized coal injection can be increased by 15-40Kg / t. That is to say, increasing the air temperature of the hot blast furnace is of great significance to the realization of low-carbon and high-efficiency production in the blast furnace ironmaking process...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-stage matching optimization method for operating parameters in the blast furnace hot blast stove firing process, so as to solve the existing technical problem that the traditional method cannot establish an accurate mathematical model to calculate the optimal air-fuel ratio and operating parameters

Images