Hood top wind pressure type anti-escape system for fuel gas blowing and control method thereof

Abstract

The invention discloses a hood top wind pressure type anti-escape system for fuel gas blowing and a control method thereof. The anti-escape system comprises a blowing hood, a blowing tube bundle, a fuel gas pipeline and an air flow device, wherein the blowing hood is located on the top of a trolley of a sintering machine; the blowing tube bundle is arranged in the blowing hood and is located abovethe trolley of the sintering machine for blowing combustible gas to a sintering charge level of the trolley of the sintering machine; the fuel gas pipeline is used for conveying the combustible gas to the blowing tube bundle; and the air flow device is arranged on the top of the blowing hood for driving external air to generate an air flow and inputting the generated air flow downward into the blowing hood from the top of the blowing hood so as to form a wind pressure zone area where the combustible gas cannot penetrate in a position above the blowing tube bundle. The anti-escape system can eliminate a fuel gas escape phenomenon substantially and can suck air out of the hood favorably, so that a purpose of stable, smooth and optimal production of a sintering production line is achieved.

Description

Technical field [0001] The invention relates to the field of metallurgical technology, and in particular to an escape prevention system for preventing the injected gas from leaking from the blowing hood during the production process of sintering ore. The invention also relates to a method for controlling the operation of the escape prevention system. Background technique [0002] The sintering process is a key link in the ironmaking process. The principle is to mix various powdered iron-containing raw materials with appropriate amounts of fuel and flux, and add appropriate amounts of water. After mixing and pelletizing, the materials are generated on the sintering equipment. A series of physical and chemical changes are sintered into agglomerates and sent to the blast furnace for the next step. [0003] In order to reduce the coke ratio and smelting cost of blast furnace ironmaking, blast furnaces often require high strength and high reducibility for sinter. In the sintering proc...

AI Technical Summary

Problems solved by technology

[0007] On the other hand, it is more difficult to inhale the air in the hood

Due to the static airfoil anti-escape plate seal, most of the area of ​​the material surface is covered by the airfoil, so that the negative pressure on the material surface is greatly limited in the attraction of the air outside the hood, and it is difficult for the air outside the hood to be sucked into the hood Into the material layer, which has a negative impact on the sintering effect

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