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

An operating parameter, hot blast stove technology, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve the problems of calculating the optimal air-fuel ratio and operating parameters, unable to establish accurate mathematical models, etc., to achieve the effect of energy saving and cost reduction

Active Publication Date: 2018-05-08
CENT SOUTH UNIV
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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

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

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0046] figure 2 For the blast furnace hot blast stove burning process, the blast furnace gas is treated by dry dust removal, etc., and is transported to the top of the hot blast stove and the preheated air is burned according to the set air-fuel ratio. The heat exchange stores heat in the regenerator in the furnace to accomplish the air supply target. Therefore, the reasonable setting of the air-fuel ratio is not only a key factor in determining the combustion efficiency and heat storage efficiency of the furnace process, but also a direct influencing factor on the changes of the dome temperature and flue gas temperature and their rate of change.

[0047] The present invention proposes such as figure 1 The shown method for optimizing the operation par...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B9/00G06K9/62
CPCC21B9/00C21B2300/04G06F18/24137G06F18/214
Inventor 蒋朝辉陈美男张海峰桂卫华谢永芳阳春华周刚
Owner CENT SOUTH UNIV
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