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Aluminium electrolysis flue gas dry purification method

A dry purification and aluminum electrolysis technology, applied in the field of flue gas purification, can solve the problems of deformation of the horizontal cover of the electrolytic cell, low flue gas collection efficiency, low purification efficiency, etc., and achieves easy maintenance, optimized design process control, and reduced maintenance. effect of cost

Active Publication Date: 2012-03-14
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

[0002] The currently used prebaked anode electrolyzer has serious deformation of the horizontal cover of the electrolyzer, poor air tightness, and low flue gas collection efficiency
The electrolytic flue gas purification control system adopts the dry purification process system developed in the early 1980s in my country. At present, there are many shortcomings such as aging equipment, high failure rate, high maintenance cost, low purification efficiency and high energy consumption.
On the basis of the existing purification system, it is difficult to improve the flue gas collection efficiency, solve the negative pressure balance of the electrolyzer, reduce the failure rate of the VRI reactor, improve the recovery of fluoride, and ensure the smooth operation of the system.

Method used

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  • Aluminium electrolysis flue gas dry purification method
  • Aluminium electrolysis flue gas dry purification method
  • Aluminium electrolysis flue gas dry purification method

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Embodiment 1

[0044] The technical process of the dry purification method for aluminum electrolysis flue gas of the present invention is that the flue gas generated by the electrolytic cell is collected by the sealed gas collection system of the electrolytic cell, flows through branch smoke pipes and horizontal smoke pipes in sequence, and then enters the underground flue after being collected and aggregated. The electrolytic flue gas is fully mixed and reacted with the fresh alumina uniformly fed through the linear feeder, and the HF gas in the flue gas is adsorbed to complete the adsorption reaction; after the adsorption reaction, the flue gas containing a large amount of fluorine-loaded alumina The channel aggregates and flows into the low-pressure pulse dust collector, and the gas-solid separation is carried out through the bag filter chamber low-pressure pulse dust removal. After separation, the fluorine-containing alumina is collected through the dust hopper of the dust collector, and t...

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Abstract

The invention relates to a flue gas purification technology and especially to an aluminium electrolysis flue gas dry purification method. The aluminium electrolysis flue gas dry purification method provided by the invention comprises the following steps of: 1) collection step by a seal gas gathering system; 2) butterfly valve unlatching step for allowing flue gas to enter into a branch smoke pipe of a horizontal smoke pipe; 3) ash removal step; 4) feeding step; 5) boiling step; 6) feeding adjustment step; and 7) flue gas purifying and dedusting step. According to the aluminium electrolysis flue gas dry purification method, the design of the technological control process is optimized, the utilization rate of energy is raised, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a flue gas purification technology, in particular to a method for dry purification of aluminum electrolysis flue gas. Background technique [0002] In the prebaked anode electrolyzer currently used, the horizontal cover of the electrolyzer is seriously deformed, the airtightness is poor, and the flue gas collection efficiency is low. The electrolytic flue gas purification control system adopts the dry purification process system developed in the early 1980s in my country. At present, there are many shortcomings such as aging equipment, high failure rate, high maintenance cost, low purification efficiency and high energy consumption. On the basis of the existing purification system, it is difficult to improve the flue gas collection efficiency, solve the negative pressure balance of the electrolyzer, reduce the failure rate of the VRI reactor, improve the recovery of fluoride, and ensure the smooth operation of the system. Con...

Claims

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Application Information

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IPC IPC(8): C25C3/22B01D46/02B01D46/04
Inventor 张生凯崔保衡茂林党栋强田元欢史作平曲荣刘立三冯兴春马亦超席霁琼
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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