High-temperature and low-energy-consumption running state estimation and optimization method for hot air furnace system

Abstract

The invention relates to a high-temperature and low-energy-consumption running state estimation and optimization method for a hot air furnace system. The high-temperature and low-energy-consumption running state estimation and optimization method comprises the following steps of: a, setting a preset running estimation index of the hot air furnace system; b, acquiring real-time monitored running state data of the hot air furnace system; c, quantifying the monitored data, and determining the on-line heat efficiency and the coal gas self-consumption rate of the hot air furnace and the hot air temperature; d, determining the degradation degree and the degradation grade of the hot air furnace system according to a difference between a theoretical extreme value of the index and an on-line monitored actual value; e, determining the type of sensitivity parameters influencing the optimization of the hot air furnace system; and f, optimizing the hot air furnace system according to optimized sensitivity parameters and a corresponding technical scheme called from a technical scheme library according to the type of the sensitivity parameters. According to the high-temperature and low-energy-consumption running state estimation and optimization method, estimation, forecasting and optimization for the production running state of the hot air furnace system are integrated, the running state of the hot air furnace system can be estimated, whether the hot air furnace system runs in a high air temperature and low energy consumption state can be judged, and a scientific and effective technical scheme is supplied to the low-energy-consumption and high-efficiency running of the hot air furnace system.

Description

technical field [0001] The present invention relates to the field of blast furnace ironmaking, in particular to a method for evaluating and optimizing the high-temperature, low-energy-consumption operation status of a hot-blast stove system. Reduce the consumption of blast furnace gas and reduce the waste of energy. Background technique [0002] Hot blast stove is an important auxiliary equipment for blast furnace ironmaking. Its main purpose is to provide high-temperature hot air for blast furnace smelting. With the development of smelting technology, the requirements for hot air temperature are getting higher and higher. At the same time, with the blast furnace gas caused by low-carbon ironmaking technology The calorific value is getting lower and lower, and the gas secondary energy reuse technology requires reducing the demand for blast furnace gas for hot blast stoves, which means that hot blast stoves need to obtain as much as possible under the conditions of lower theo...

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Problems solved by technology

This method can reasonably control the entire combustion process according to the different characteristics of each combustion stage of the hot blast stove, and saves the amount of gas; its disadvantage is that it can only realize the optimal ratio of air and gas supply in the hot blast stove combustion system The overall hot blast stove system has not been fully researched and optimized, so the intelligent combustion method has reduced the gas consumption of the blast furnace to a certain extent, but from the analysis of the utilization efficiency of the hot blast stove heat energy, it still cannot be significantly improved

In China, it is generally adopted to increase the combustion furnace to increase the preheating of combustion-supporting air and gas, etc., but due to the lack of research on the comprehensive utilization and consumption of the energy of the hot blast stove system, the temperature of the hot blast is significantly increased, followed by a large consumption of blast furnace gas. , resulting in a waste of energy

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