Heat storage and heat exchange linked heating furnace and operation method thereof

Abstract

The invention discloses a heat storage and heat exchange linked heating furnace and an operation method thereof. The heat storage and heat exchange linked heating furnace comprises a hearth, a steel tapping furnace door, a steel input furnace door, a flue ad a stepping beam mounted in the hearth. The hearth is divided into a first heating section, a second heating section and a third heating section along the side from the steel input furnace door to the steel tapping furnace door, a first flat flame burner is mounted at the position, on the first heating section, of the top of the hearth, andflame adjusting burners are mounted on the two sides of the position, on the first heating section, of the hearth. Heat storage type burners are mounted on the two sides of the position, on the thirdheating section, of the hearth. The horizontal height of the top of the position, of the first heating section, of the hearth is lower than that of the position, of the third heating section, of thehearth. The top of the position, on the second heating section, of the hearth is concaved downwards to form a U shape from the position, on the first heating section, of the top of the hearth to the position, on the third heating section, of the top of the hearth. According to the heat storage and heat exchange linked heating furnace and the operation method thereof, the problem of large heat storage type furnace pressure and secondary combustion in a coal gas burner is effectively relieved.

Description

technical field [0001] The application belongs to the fields of heating furnace equipment, regenerative combustion technology and heat exchanger equipment, and in particular relates to a heating furnace combined with heat storage and heat exchange and its operating method. Background technique [0002] In the prior art, the regenerative heating furnace adopts an efficient regenerative heat exchange device to maximize the recovery of the sensible heat in the high-temperature flue gas for preheating the gas and combustion-supporting air to obtain a high temperature above 1000°C. The heating furnace adopting regenerative combustion technology can reduce the temperature of the high-temperature flue gas discharged from the furnace to below 150°C, and the heat recovery rate can reach more than 85%; and make effective use of low calorific value fuels such as blast furnace gas. However, due to the inherent characteristics of regenerative combustion, there are some problems during op...

AI Technical Summary

Problems solved by technology

When this kind of combustion technology is reversing, the moment the gas reversing valve changes from gas supply to gas extraction, the burner, reversing valve and the pipeline between the two are still full of gas due to the existence of gas residual pressure. When the gas mixes with the residual oxygen in the high-temperature flue gas entering the burner after reversing, secondary combustion occurs instantly, and the regenerator in the burner will appear melting, sticking, cracking, deformation, and porosity under the high temperature of the flame. Clogging and other phenomena, resulting in a decrease in heat storage capacity

The gas that has not undergone secondary combustion is discharged together with the flue gas, resulting in a waste of energy

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