Top-fired air heating furnace

Abstract

The invention belongs to the technical field of metallurgy industry, and in particular relates to a top-fired air heating furnace. A combustor of the top-fired air heating furnace is positioned above an air heating furnace heat storage body with a hot-blast air outlet, and is a vault part of the top-fired air heating furnace. The combustor has a three-segment type structure; a first segment is a combustion chamber which is positioned at the lower part of the combustor and is directly seated on the air heating furnace body; the upper end of a working inner lining of the combustion chamber is in a shape of a contracting mouth and vertically stretches into a gas swirl premixing chamber of the middle part without contacting a working inner lining of the gas swirl premixing chamber, and can expand freely; a second segment is the gas swirl premixing chamber positioned at the middle part of the combustor; and a third segment is an air chamber positioned at the upper part of the combustor. The top-fired air heating furnace does not generate the mutual blow-by between air and gas, and has the characteristics of no gas residues at the combustor vault, higher swirl strength, and better stability and service life of the masonry of the combustor vault. The top-fired air heating furnace can be widely applied to the air heating furnace to heat blast furnace blast media.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry, in particular to a top-combustion hot blast stove. Background technique [0002] Large-scale blast furnaces are equipped with top-fired hot blast stoves, which began in 1979 and were created by Shougang. But before 2002, only a few enterprises such as Shougang were promoting and using it. However, since Mr. Kalugin of Russia announced the 02157064.7 patent in China and built a demonstration project, the top-combustion hot blast stove has completely surpassed the internal combustion hot blast stove with its remarkable technical advantages and has been widely promoted and applied. [0003] The burner of the Kalujin top-fired hot blast stove adopts a two-stage structure: the vault of the hot blast stove is the combustion chamber, which is the first stage; the premixing chamber is the second stage. Its main features are: the upper and lower overlapping air rings and gas rings made of...

AI Technical Summary

Problems solved by technology

This will greatly shorten the life of the masonry that is suspended approximately horizontally at the interface and become the weakest link of the burner

Simultaneously, this external pipe running gas also has the second problem of the above-mentioned Kalujin top-fired hot blast stove

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