Gas gathering system of divisional gas-gathering type aluminum electrolytic bath

Abstract

The invention relates to a gas gathering system of a divisional gas-gathering type aluminum electrolytic bath, which belongs to the technical field of electrolyzing aluminum. The gas gathering system of the electrolytic bath comprises in-bath horizontal flues, clapboards, vertical flues, upper convergence flues, bottom convergence flues and a main flue, wherein the number of the in-bath horizontalflues is between 2 and 5, the height range is between 100 and 400 millimeters; the clapboards are vertical to the length direction of the horizontal flues and equally divide the length of the horizontal flues; and the horizontal flues and the clapboards divide a horizontal gas-gathering area into a plurality of areas. The vertical flues are arranged at one end or two ends of the electrolytic bath, have a same structure with a door-type upright post or are positioned on the outside of the door-type upright column, and are communicated with the main flue though the bottom convergence flues. Byapplying the system, a two-end or single-end gas-gathering mode can be adopted, and no matter which gas-gathering mode is adopted, a plurality of the in-bath horizontal flues are arranged to divide the in-bath space into a plurality of areas to perform divisional gas gathering, and the distribution evenness of positive pressure in the bath is improved, thus the gas gathering efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum, and in particular relates to a gas collection system of a partitioned gas collection type aluminum electrolytic cell. Background technique [0002] As the capacity of the aluminum electrolytic cell increases, the length of the electrolytic cell increases accordingly. In this case, the structural form of the gas collecting device on the upper part of the tank with the traditional structure can no longer meet the requirements of the pressure distribution in the electrolytic cell cover, especially in the environment of energy saving and emission reduction, the structural form of the gas collecting device has a great impact on the electrolytic aluminum industry. The role of emission reduction becomes even more important. [0003] The early large-scale prebaked anode electrolyzer mostly used a V-shaped structure gas collector under the horizontal cover plate. In this gas collection met...

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Problems solved by technology

Although this structure has achieved a relatively obvious gas collection effect, it still fails to solve the problem that the original V-shaped structure device is too close to the fire hole, and the gas collection efficiency is still limited.

[0004] The structural forms of the above-mentioned several gas-collecting devices, no matter how they are adjusted, there is a problem, that is, the gas-collecting device is located above the tank and occupies the upper space. In this way, on the one hand, the upper structure becomes complicated; Gas efficiency, the height of the tank will be forced to increase, which will not only increase equipment investment but also increase the height of the plant

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