Gas collecting method for crown block in electrolysis workshop

Abstract

The invention discloses a gas collecting method for a crown block in an electrolysis workshop, which is mainly used for collecting flue gas generated during the pole changing operation of the electrolysis workshop. A gas collecting device is added to the crown block, and comprises a telescopic pipeline and a dust collecting hood; a flue gas purifying system is added to a crown block beam, and comprises a hydrogen fluoride adsorption device, a dust collector, an induced draft fan and a regular discharging device which are connected in sequence; when the crown block clamps the residual pole, leaves a electrolyzer and moves to a residual pole cooling system, the dust collecting hood is placed on the side of the residual pole and always moves with the residual pole to collect the flue gas emitted by the residual pole; the flue gas emitted by the residual pole enters the telescopic pipeline through the dust collecting hood to enter the flue gas purifying system; the flue gas first enters the hydrogen fluoride adsorption device and then the dust collector, and the induced draft fan is used for meeting the requirements of the entire system for the air volume and the negative pressure; the purified flue gas is discharged to the atmosphere through the induced draft fan. According to the invention, fluoride and dust can be can collected and treated, so that the amount of unorganized emissions during the transfer of the residual pole can be reduced.

Description

technical field [0001] The invention relates to a method for reducing fugitive discharge during the transfer process of anode residues in an electrolysis workshop, in particular to a method for collecting gas in an electrolysis workshop. Background technique [0002] The industrial aluminum electrolytic cell uses cryolite-alumina melt as the electrolyte and carbon material as the electrode for electrolysis. Liquid metal aluminum is precipitated on the cathode, and carbon dioxide-based gas is generated on the anode. At the same time, the electrolytic cell emits harmful gases with fluoride, sulfur dioxide, and dust as the main pollutants, permeating the electrolytic workshop, deteriorating the working conditions and seriously affecting the health of production workers. The diffusion of electrolytic flue gas around the factory area will pollute the atmosphere and bring great harm to the development of agricultural and animal husbandry production and people's lives. Therefore, ...

AI Technical Summary

Problems solved by technology

At the same time, the electrolytic cell also emits harmful gases with fluoride, sulfur dioxide, and dust as the main pollutants, permeating the electrolytic workshop, deteriorating the working conditions and seriously affecting the health of production workers

The diffusion of electrolytic flue gas around the factory area will pollute the atmosphere and bring great harm to the development of agricultural and animal husbandry production and people's lives

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