Heat accumulating type heating furnace totally using blast furnace gas as fuel

Abstract

The invention belongs to the technical field of heating furnace combustion. A heat accumulating type heating furnace totally using blast furnace gas as a fuel comprises a heating furnace body, a blast furnace gas heat accumulating chamber, an air heat accumulating chamber, a blast furnace gas ignition burner, a blast furnace gas pipeline system, a combustion air pipeline system, an air side exhaust pipeline system and a gas side exhaust pipeline system; a hearting furnace hearth is arranged in the heating furnace body; the blast furnace gas heat accumulating chamber and the air heat accumulating chamber are formed on two side walls of the heating furnace body; and the blast furnace gas ignition burner is arranged on the end wall or the side wall of the soaking zone of the heating furnace body. The heating furnace is characterized in that: a resistance wire heating ignition device is arranged in the hearting furnace hearth and positioned in front of a nozzle of the blast furnace gas ignition burner planed to be first opened during ignition or in front of a nozzle of the blast furnace gas heat accumulating chamber, and the resistance wire heating ignition device is positioned in thehearting furnace hearth. The ignition operating process is simple, convenient and reliable to implement when the drying furnace or the cold furnace is ignited.

Description

technical field [0001] The invention belongs to the technical field of heating furnace combustion, and in particular relates to a regenerative heating furnace which uses blast furnace gas as fuel. Background technique [0002] Blast furnace gas is a by-product gas in iron and steel plants. Due to its low calorific value, it is difficult to make the furnace temperature reach a certain level no matter whether it is directly burned on the steel rolling heating furnace or preheated to a certain temperature through a preheater. Above 1150°C, meeting the temperature requirements for billet heating. In the late 1990s, when domestic steel rolling heating furnaces used blast furnace gas as fuel, they basically used double regenerative combustion technology to preheat the air and blast furnace gas to about 1000°C before entering the furnace for combustion to meet the billet heating in the furnace. At the same time, because the application of dual regenerative combustion technology on...

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Problems solved by technology

If filling liquefied gas is used to supply the ignition burner, the supply of filling liquefied gas, on-site piping and layout are relatively complicated, and the implementation cost is relatively high; Need to add fuel continuously manually, the labor intensity is very high, the site environment is dirty, and the implementation cost is also very high

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