Automatic blast furnace air adjusting system and air adjusting method for metallurgic industry

Abstract

The invention relates to an automatic blast furnace air adjusting system and air adjusting method for metallurgic industry. The system comprises a first blast furnace (1), a second blast furnace (2), a first fan (3) and a second fan (4), wherein the first fan (3) supplies the first blast furnace (1) with air, and a first check valve (5-1) and a first air supply valve (5-2) are sequentially mounted on an air supply pipeline of the first blast furnace (1); and the second fan (4) supplies the second blast furnace (2) with air, and a second check valve (6-1) and a second air supply valve (6-2) are sequentially mounted on the air supply pipeline of the second blast furnace (2). The automatic blast furnace air adjusting system and air adjusting method have the advantages that the air adjusting system is designed between the air supply pipelines of the two blast furnaces; when one fan fails in supplying air, the air adjusting system allocates one part of air supplied by the fan supplying the other blast furnace with air to the blast furnace with air supply failure so as to ensure that the blast furnace depending on the air supply of the failure fan does not have slags and ensure that all air ducts are repaired without affecting work until all the air ducts are restored; and therefore, the normal production of the blast furnaces is ensured, and safety accidents caused by coal gas backflow and the like are avoided.

Description

technical field [0001] The invention relates to a metallurgical blast furnace, in particular to an automatic ventilation system and a ventilation method for a blast furnace in the metallurgical industry. Background technique [0002] In the metallurgical industry, blast furnace air supply is a very important link, and the reliability of blast furnace air supply directly affects the normal production of blast furnace. The blast furnace axial flow compressor is a gas compression machine that supplies the cold air required for smelting to the ironmaking blast furnace. The process of blast furnace smelting production is that the cold air enters the blast furnace hearth through the blast furnace tuyere after being heated by the hot blast stove, providing combustion air for the blast furnace smelting process and supporting the charge. Due to various reasons, the compressor may be shut down suddenly, and the cold air supply to the blast furnace may be suddenly and unforeseeably in...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an automatic blast furnace ventilation system and its ventilation method in the metallurgical industry, so as to solve the problem that the blast furnace in the current metallurgical industry cannot avoid accidental fan shutdown due to faults, resulting in vicious accidents such as slag filling and material sitting in the tuyere, and even accidents. There was a problem of blast furnace gas backflow and explosion caused by fan trip

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