Full combustion smoke gas excess heat reclaiming system of argon oxygen decarburization converter

Abstract

The invention relates to a full combustion smoke gas excess heat reclaiming system of an argon oxygen decarburization converter, which comprises a smoke duct, a convective heat exchange device, a coal economizer, a steam pocket, a soft water box, a feed water pump of a deaerator, the deaerator, a feed water pump of a furnace and a low-pressure forced circulation pump. The convective heat exchange device is vertically arranged, an inlet thereof is connected with the smoke gas duct, and one side of the outlet of the convective heat exchange device is provided with the coal economizer. The steam pocket is respectively connected with the smoke duct, the convective heat exchange device and the coal economizer through a loop pipeline. The soft water box is sequentially connected with the feed water pump of the deaerator, the deaerator, the feed water pump of the furnace and the coal economizer. The deaerator is connected with a furnace mouth section vaporized smoke duct through the low-pressure forced circulation pump. The system has the advantages of being capable of effectively preventing the wall of a pipe from overheating and slag bonding, guaranteeing the service life of an inlet section smoke duct and being convenient in operation and maintenance since the inlet section vaporized smoke duct adopts the mode of low-pressure forced circulation, and a charging opening and an oxygen lance opening arranged on the inlet section also adopt the mode of low-pressure forced circulation. Furthermore, the smoke duct can reduce the height of a factory, is compact in distribution, and is good for the whole arrangement of equipment in a converter region.

Description

technical field [0001] The invention relates to a flue gas waste heat recovery system, in particular to an argon-oxygen decarburization converter full-combustion flue gas waste heat recovery system. Background technique [0002] Argon-oxygen decarburization converter: its English abbreviation is AOD converter, which is a stainless steel refining equipment. The equipment composition is similar to the traditional carbon steel converter, such as tilting device, support ring and furnace shell suspension device, etc. The bottom side of the furnace is equipped with spray guns that blow gas into the molten pool horizontally. The number of spray guns is generally set to 2 to 7 according to the size of the furnace capacity. The meeting point of the extension lines of the lance coincides with the vertical axis of the furnace. The spray gun is composed of two layers of inner tube (copper) and outer tube (stainless steel), and the inner tube is introduced into the main blowing gas (ma...

AI Technical Summary

Problems solved by technology

If medium pressure forced circulation is adopted, it is very easy to cause problems such as overheating and slagging of the pipe wall, and difficulty in operation and maintenance.

[0008] Third, due to the high exhaust gas temperature, it is necessary to increase the air cooler equipment to further reduce the flue gas temperature, which is not conducive to the recovery of waste heat in the flue gas, and increases the investment and operation costs

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