Energy-saving high-efficient electrolytic aluminum waste gas treatment device

Abstract

The invention discloses an energy-saving high-efficient electrolytic aluminum waste gas treatment device which comprises an electrolyzer. A first pipe is fixedly connected to the top part of the electrolyzer; an axial flow fan is fixedly connected to one end, far away from the electrolyzer, of the first pipe; a second pipe is fixedly connected to one end, far away from the first pipe, of the axialflow fan; a bag-type dust collector is fixedly connected to one end, far away from the axial flow fan, of the second pipe; a third pipe is fixedly connected to one side of the outer wall of the bag-type dust collector; and a gas outlet pipe penetrates through one side of the inner wall of the third pipe. According to the energy-saving high-efficient electrolytic aluminum waste gas treatment device provided by the invention, hydrogen fluoride gas and carbon monoxide gas which originally need to be treated are converted into hydrogen fluoride liquid and calcium carbonate, the hydrogen fluorideliquid is a raw material required for other industries, and the calcium carbonate is a building material, so that a producer can sell the hydrogen fluoride liquid and the calcium carbonate, not only is the waste gas treatment problem solved, but also the waste gas can be converted into sellable economic goods, the income source of a factory is improved, and the waste gas emission can reach the standard.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to an energy-saving and high-efficiency electrolytic aluminum waste gas treatment device. Background technique [0002] Electrolytic aluminum is aluminum obtained by electrolysis. The modern electrolytic aluminum industry uses cryolite-alumina molten salt electrolysis. Molten cryolite is the solvent, alumina is the solute, the carbon body is the anode, and the aluminum liquid is the cathode. After a strong direct current is applied, the electrochemical reaction is carried out on the two electrodes in the electrolysis device at 950°C-970°C. Namely electrolysis. The anode products are mainly carbon dioxide and carbon monoxide gas, which contains a certain amount of harmful gases such as hydrogen fluoride and solid dust. The boiling point of hydrogen fluoride is 19.54 ° C. Hydrogen fluoride is highly toxic and will cause great damage to the human body. Because hydrofluoric...

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Problems solved by technology

[0003] However, when it is actually used, the main technical problem is that the treatment device usually filters the hydrogen fluoride, carbon monoxide, carbon dioxide and solid dust generated during electrolysis, so that the discharged air reaches the specified standard, and these production wastes are not treated. Effective utilization, providing economic value to the factory from the new

Secondly, when electrolysis occurs in the electrolysis device, it is in a high temperature environment of 950°C-970°C. The electrolysis device will leak part of the heat through heat conduction. The existing devices have not effectively utilized the leaked heat.

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