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A method for suppressing the emission of pfc in aluminum electrolysis industry

An aluminum electrolysis and industrial technology, applied in the field of suppressing PFC emissions in the aluminum electrolysis industry, can solve the problems of not being able to deal with multiple effect tanks at the same time, the effect is not extinguished in time, and complicated operations, etc., to achieve the suppression of PFC generation, convenient operation, and realization method simple effect

Active Publication Date: 2020-11-03
CENT SOUTH UNIV
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Problems solved by technology

[0004] Chinese patent 102409360A is based on the deviation of the anode current density generated by the detection theory and the actual trigger PFC, mobilizing the crane to adjust the height of the anode, the operation is complicated and cannot handle multiple effect cells at the same time
Chinese patent 102808199B is based on a PFC monitoring system that can measure the change of PFC gas content in the exhausted flue gas to determine the critical concentration of alumina, but the cost is high, and the effect is not extinguished in time

Method used

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  • A method for suppressing the emission of pfc in aluminum electrolysis industry
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  • A method for suppressing the emission of pfc in aluminum electrolysis industry

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] see figure 1 , the structure of the electrolytic cell series in this embodiment is: the electrolytic cells 1 are arranged in a single row with double-terminal power supply, the electrolytic cells 1 in the series are all connected in series, and the electrolytic cells 1 are connected through the bus bar 2, that is to say, the current is from the rectified The positive electrode is sent to the anode of the first electrolytic cell 1 through the bus bar 2, then ...

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Abstract

The invention discloses a method for inhibiting PFC (perfluocarbon) emission of aluminum electrolysis industry. The method is characterized in that an electrolytic cell which causes anode effect and two adjacent electrolytic cells are connected in parallel through short circuit buses at the bottom parts of the electrolytic cells, so that the current flowing through the electrolytic cells can be reduced, and the anode current density of an effect groove is changed, and as a result, the anode effect is inhibited, and the PFC emission of the aluminum electrolysis industry is inhibited.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis cells, and in particular relates to a method for suppressing PFC emission in the aluminum electrolysis industry. Background technique [0002] my country is the world's largest producer of primary aluminum, accounting for more than 1 / 4 of the world's total output. Aluminum electrolysis is recognized as the world's largest emission source of strong greenhouse gas PFC (perfluorocarbon), accounting for more than 90% of my country's total emissions. Therefore, efficient control of air pollutants from aluminum electrolysis is one of the keys to supporting the significant improvement of air quality in my country. Perfluorocarbons are the difficulty and focus of air pollutant control in aluminum electrolysis process. [0003] The anode effect is the source of fluorocarbons in aluminum electrolytic cells, and source suppression is the main way to control perfluorocarbons at present. The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/20
Inventor 张红亮王棋钰李天爽李劼国辉李家琦孙珂娜
Owner CENT SOUTH UNIV
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