Device for strengthening central coal gas flow of reduction furnace of Ouzhi furnace
A technology of gas flow and reduction furnace, applied in furnaces, fluidized bed furnaces, furnace types, etc., can solve the problems of restricting Ouyeye furnace production, hidden dangers of safety production, strong edges, etc., to achieve the best utilization of gas, improve metallization rate, The effect of reducing the occupied area
Pending Publication Date: 2021-01-12
XINJIANG BAYI IRON & STEEL
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Problems solved by technology
However, during the production of Ouye Furnace, due to the defect in the design of this device, it caused a fracture, resulting in a serious production accident of Ouyeel Furnace
In the end, due to the safety hazard of this device, this device was removed and its function was cancelled.
From the actual situation of later production, the central airflow of the reduction furnace is weakened, and the distribution of the reduction gas entering the reduction furnace from the surrounding pipe is basically strong at the edge, and the distribution is very uneven, and the metallization rate of the reduction furnace material is reduced. The fuel ratio rises, which seriously restricts the production of Ouyeel furnace
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[0008] A device for strengthening the central gas flow of the reduction furnace of Ouyeel furnace, such as figure 1 As shown, including the reduction furnace, a bottom connecting pipe 8 is vertically arranged below the center of the bottom of the reducing furnace. The lower end of the bottom connecting pipe 8 is closed. The pipe 8 and the gas distribution pipeline 10 are all made of refractory bricks, and the gas distribution pipeline 10 forms an included angle of 100 degrees with the bottom connecting pipe 8 upper pipe body. The bottom connection pipe wall 11 relative to the gas distribution pipeline 10 outlet is provided with a checkhole 12, and the bottom connection pipe body below the checkhole 12 is connected with a cold gas cooling pipe 9, and the cold gas cooling pipe 9 passes through the gas Regulating valve 13 and cut-off valve 14 communicate with cold gas main pipe 16 that is connected with pressurizer 15 .
[0009] In the center of the reduction furnace, the bottom...
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The invention discloses a device for strengthening central coal gas flow of a reduction furnace of an Ouzhi furnace. A bottom connecting pipe is vertically arranged at the lower part of the bottom center of the reduction furnace, one side of the middle part of the bottom connecting pipe is obliquely and downwards connected with a coal gas distribution pipeline, an access hole is formed in the pipewall of the bottom connecting pipe, the pipe body of the bottom connecting pipe is connected with a cold coal gas cooling pipe, and the cold coal gas cooling pipe communicates with a cold coal gas main pipe. A bottom cylinder body, a middle cylinder body and an upper circular truncated cone body are sequentially built in the center of the reduction furnace from bottom to top, the upper cylinder body is built at the top end of the upper circular truncated cone body, a top circular truncated cone body is built at the top of the upper cylinder body, and an upper rectangular air outlet channel and a lower rectangular air outlet channel are arranged in the upper cylinder body. Coal gas channels are formed in the centers of the upper cylinder body, the upper circular truncated cone body, the middle cylinder body and a bottom cylinder body in a penetrating manner, and the lower parts of the coal gas channels communicates with a bottom connecting pipe. Reductive coal gas can be distributed tothe center of the large-diameter reduction furnace according to needs.
Description
technical field [0001] The invention relates to a device for enhancing central gas flow in a reduction furnace of an Ouye furnace. Background technique [0002] For the reduction furnace used in Baosteel's Phase I COREX3000, the inlet of the reducing gas adopts the structure of a gas header embedded in the furnace body of the reduction furnace and a circle of downward nozzles. The coal gas entering the reduction furnace also all enters the furnace from the outer circumference of the reduction furnace through the downward spout. As the diameter of the reduction furnace increases, the reducing gas distributed in the center of the reduction furnace decreases gradually. Especially when the dust content of the coal gas increases and the gas permeability of the charge deteriorates, the reducing gas distributed in the center of the reduction furnace cannot meet the gas flow and quantity requirements necessary for the normal reduction reaction of the charge in the center, which wil...
Claims
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IPC IPC(8): C21B13/00
CPCC21B13/0073
Inventor 季书民
Owner XINJIANG BAYI IRON & STEEL