Heating method and system based on steel rolling heating furnace

Abstract

The invention relates to the field of a metallurgical technology, and discloses a heating method and a heating system based on a steel rolling heating furnace. The method comprises the steps of denitrifying a part of combustion-supporting gas to generate oxygen-enriched combustion-supporting gas; preheating the oxygen-enriched combustion-supporting gas; preheating coal gas; mixing and feeding the oxygen-enriched combustion-supporting gas and the preheated coal gas to a soaking zone of the heating furnace to carry out oxygen-enriched combustion; mixing and feeding a part of oxygen-enriched combustion-supporting gas and the preheated coal gas into a heating section of the heating furnace to carry out pulse-combustion; and preheating the oxygen-enriched combustion-supporting gas and the coal gas through furnace tail flue gas. According to the method provided by the invention, an oxygen-enriched combustion technology, a pulse combustion technology and a heat accumulating type combustion technology can be combined to realize coupling application on the oxygen-enriched combustion technology and the heat accumulating type combustion technology on the steel rolling heating furnace, the technical advantages of heat accumulating type combustion, oxygen-enriched combustion and pulse combustion can be integrated, and the heat transfer speed and heating speed in the steel rolling and heating process can be accelerated to finally realize the energy-saving and cost-reducing of the steel rolling heating furnace.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and is mainly applicable to a heating method and system based on a steel rolling heating furnace. Background technique [0002] The steel rolling heating furnace is the main energy-consuming equipment of the steel rolling system, accounting for 60-70% of the energy consumption of steel rolling. Therefore, the key point of energy saving in the steel rolling process is the energy saving of the steel rolling heating furnace. With the increase of steel rolling production capacity in recent years, the number of steel rolling heating furnaces is also increasing, and the steel rolling heating furnaces are also developing in the direction of large-scale, high efficiency, and low pollution. With the advancement of steel rolling heating furnace technology, energy-saving technologies such as walking beams, regenerative combustion, vaporization cooling, energy-saving coatings, hot charging and hot deliver...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a heating method and system based on a steel rolling heating furnace, which can effectively combine oxygen-rich combustion, oxygen-poor combustion and intermittent combustion, and solve the problems of oxygen-rich, oxygen-poor, intermittent and intermittent combustion in the application process of energy-saving technology. Contradictory problems of intermittent combustion, combining the technical advantages of regenerative combustion, oxygen-enriched combustion and pulse combustion, speeding up the heat transfer rate and heating rate during the steel rolling heating process, and finally realizing the energy saving and consumption reduction of the steel rolling heating furnace

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