Gas injection device eliminating sidewind influence and injection method

Abstract

The invention discloses a gas injection device eliminating the sidewind influence. The device comprises a sintering machine trolley, a gas injection device body and an injection cover. The sintering machine trolley is located in the injection cover. The gas injection device body is located above the sintering machine trolley. Two side wallboards of the injection cover are located on the two sidesof the sintering machine trolley. A louver type sidewind-prevention top plate device is arranged at the top of the injection cover and comprises a connecting rod and louver boards. One end of the connecting rod extends out of the side face of the injection cover. The louver boards are connected with the connecting rod. The louver type sidewind-prevention top plate device is arranged at the top ofthe injection cover, by adjusting the louver type sidewind-prevention top plate device, the influence of sidewind on gas injection in a sintering machine is eliminated, and the injection device and acontrol method which can change along with changes of site sidewind conditions and flow field conditions in the cover are developed for achieving the purposes of stable production, smooth production and high yield of a whole production line.

Description

technical field [0001] The invention relates to a gas injection device and an injection method, in particular to a gas injection device and an injection method for eliminating the influence of side wind, and belongs to the field of sintering. Background technique [0002] The sintering process is a key link in the ironmaking process. Its principle is to mix various powdery iron-containing raw materials with an appropriate amount of fuel and flux, add an appropriate amount of water, mix and pelletize the material on the sintering equipment to make the material A series of physical and chemical changes, sintered into blocks, which are 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 process, the sintered ore is generally required to have high strength, high yield, low return rate, and low fuel consu...

AI Technical Summary

Problems solved by technology

[0005] The gas injection device in the prior art lacks structural measures that can effectively eliminate the influence of crosswinds, so when the sintering machine workshop is an open workshop, or even an open workshop by the sea, the airflow field in the hood is disturbed by the influence of crosswinds , gas and atmosphere cannot be mixed stably, which will bring the following problems to production:

[0006] 1. The concentration of the gas inhaled into the material layer is uneven: when the airflow field in the hood is disturbed by the influence of the side wind, the gas cannot be mixed stably with the atmosphere in the hood, and it is inevitable that some gas will not be diluted to the design concentration, or some When the gas is diluted below the design concentration, after being sucked into the material layer, the concentration of the gas is different, and the position of combustion and the amount of supplementary heat are also different, which will greatly affect the effect of gas injection assisted sintering Negative impact;

[0007] 2. It is easy to cause gas escape: when the air flow field in the hood is disturbed by the influence of side wind, the flow field in the hood is no longer stable and uniform downward, which will cause the negative pressure on the material surface to be unable to spray the blowing pipe well. The exhaust gas forms a suction force. When the specific gravity of the selected gas (such as coke oven gas) is lighter than the atmosphere, it will inevitably form a situation where part of the gas escapes from the suction force of the material surface and escapes upward.

This will not only cause serious energy waste, but also cause potential safety hazards of personnel poisoning.

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