A kind of asymmetric and uniform air-absorbing aluminum electrolytic cell gas collecting flue
An aluminum electrolytic cell, asymmetric technology, applied in the field of gas-collecting flue of aluminum electrolytic cell, can solve the problem of less research on the uniformity of gas-collecting flue gas collection, so as to avoid unbalanced collection of flue gas and save building materials Effect
Active Publication Date: 2017-12-01
CENT SOUTH UNIV
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Embodiment 1
[0033] The present invention adopts computational fluid dynamics (CFD) method, utilizes the Fluent software of large-scale commercial software ANSYS platform, according to figure 2 with image 3 Set up the gas-gathering flue structural model of the present invention, as Figure 4 As shown, according to the design, set the boundary conditions such as the flow velocity at the inlet of each gas collecting hood and the negative pressure at the outlet of the flue main pipe, and calculate the flow velocity distribution in the gas collecting flue, as shown in Figure 5 and Image 6 shown.
[0034] from Figure 5It can be seen that the flow velocity in the first gas collection hood 1, the second gas collection hood 2 and the third gas collection hood 3 is similar, and the flow velocity in the second half of the long flue branch pipe 9 is faster, which can dissipate the dust particles entering the flue. Quickly blow into the main pipe, which helps to concentrate the smoke exhaust,...
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Abstract
The invention discloses an aluminum electrolysis cell gas collection flue sucking gas asymmetrically and uniformly. The aluminum electrolysis cell gas collection flue comprises seven gas collection hoods different in size and shape, two flue branch pipes different in length and a flue header pipe, wherein the long flue branch pipe (9) is connected with the first gas collection hood (1), the second gas collection hood (2) and the third gas collection hood (3); the short flue branch pipe (10) is connected with the fourth gas collection hood (4), the fifth gas collection hood (5) and the sixth gas collection hood (6); the long flue branch pipe (9) and the short flue branch pipe (10) are connected with the flue header pipe (11); the lower side of the flue header pipe (11) is connected with the seventh gas collection hood (7); a filter net (8) is arranged at the outlet end of the flue header pipe (11). The pipe diameters of the first gas collection hood (1), the second gas collection hood (2), the third gas collection hood (3), the fourth gas collection hood (4), the fifth gas collection hood (5), the sixth gas collection hood (6) and the seventh gas collection hood (7) are gradually reduced along with reduction of the distance between each hood and the flue header pipe (11). The aluminum electrolysis cell gas collection flue sucking gas asymmetrically and uniformly is high in gas collection efficiency and can improve the thermal stability in the electrolytic aluminum production process.
Description
technical field [0001] The invention relates to a gas-collecting flue for an aluminum electrolytic cell, in particular to an asymmetrical and uniform air-absorbing gas-collecting flue for an aluminum electrolytic cell. Background technique [0002] The gas-collecting flue is the main structural component of the upper gas-gathering system of the aluminum electrolytic cell. It is the main channel for gas collection and heat dissipation in the cell. It accounts for about 25%-35% of the total heat dissipation of the electrolyzer, and has a great influence on the heat balance of the electrolyzer. [0003] With the development of the aluminum electrolysis industry, the capacity of aluminum electrolytic cells has grown rapidly. The current 500kA series is the mainstream of the industry, and the 600kA series has also been put into production for more than a year. The traditional mechanical smoke exhaust process has gradually exposed the defects of uneven smoke exhaust and poor regu...
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IPC IPC(8): C25C3/22
CPCC25C3/22
Inventor 张红亮孙珂娜李劼郭龙梁金鼎宗传鑫汤卓李天爽
Owner CENT SOUTH UNIV