Blast furnace hot blast stove ceramic burner with central circumferential flow column

Abstract

The present invention is one ceramic burner with central ambient-flow column for blast furnace hot-blast stove, and belongs to the field of ceramic burner technology. The ceramic burner has air circuit around the gas circuit and central ambient-flow column in the center of the gas circuit. It has guide plate in the position of central ambient-flow column opposite to the gas inlet, primary air inlet in the lower part of the brazier, secondary air inlet in the upper part of the brazier and vibration damping guide ring set on the protecting cap. The ambient-flow column forms double-peak distribution to reduce airflow thickness and highest flow rate position near the peripheral, so that the present invention is favorable to the penetration and mixing of the primary air and the secondary air to gas and has stable combustion, low air consumption coefficient and high combustion temperature. The present invention is suitable for all kinds one hot blast stove.

Description

technical field [0001] The invention belongs to the technical field of hot blast stoves for ironmaking blast furnaces, in particular to ceramic burners for hot blast stoves [0002] technology field. Background technique [0003] Since the 1960s, people have used ceramic burners on hot blast stoves in the metallurgical industry. Because ceramic burners have obvious advantages over metal burners, they were quickly promoted on hot blast stoves. After more than 30 years of continuous improvement and development, there are currently more than a dozen structural types of ceramic burners, mainly sleeve-type and grid-type ceramic burners. Sleeve ceramic burners have been widely used at home and abroad. Due to the complex structure and difficult maintenance of grid-type ceramic burners, they are only used in a few large-scale external combustion hot blast stoves. [0004] The ceramic burner improves the mixing of gas and combustion-supporting air and the u...

AI Technical Summary

Problems solved by technology

The increase of excess air and unburned CO content reduces the theoretical combustion temperature of the fuel, which in turn affects the increase of the vault temperature and hot blast temperature of the hot blast stove

[0006] (2) The airflow in the fire well is seriously deflected, and the distribution of various medium components is seriously uneven, which reduces the combustion efficiency and combustion temperature, and also causes the lining of the fire well to be damaged due to uneven heating

[0008] (4) The falling bricks of the internal combustion hot blast stove will smash the air distribution cap and block it and the central gas channel, reducing the service effect and life of the burner

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