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Process and device for improving the capture of so2 in electrolytic cell gases

A technology of SO2 and gas, applied in separation methods, gas treatment, chemical instruments and methods, etc.

Inactive Publication Date: 2014-08-27
SOLIOS ENVIRONNEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This solution is not entirely satisfactory as it requires bulky and expensive installations to separate the fluorinated alumina in the first stage of the process

Method used

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  • Process and device for improving the capture of so2 in electrolytic cell gases
  • Process and device for improving the capture of so2 in electrolytic cell gases
  • Process and device for improving the capture of so2 in electrolytic cell gases

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Embodiment Construction

[0029] As shown in Figures 1 to 3, the present invention involves a plurality of reactors 2 1 ,2 2 ,...,2 n Consisting of a gas treatment center 1, a preferred ascending gas flow 3 in the reactor must be cleaned of effluents flowing in parallel. First Reactor 2 1 The supply of adsorbents of new powdery material type, a type known per se, such as aluminum oxide (Al2O3), is produced from fresh powdery material storage means 4 of the silo type and distributed to the first One reactor 2 1 , the distribution tool 14 is set between the storage tool 4 and the reactor 2 1 between.

[0030] More precisely, the distributing means 14 distributes a per se known type in the reactor 2 1 The storage tool 4 for the powdered material in is connected to the injection tool 7 . By means of distribution 14 , for example a pneumatic conveyor, it is understood that the transport of sorbents of powdery material type is carried out according to any means of the prior art, for example according ...

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Abstract

A method and device for capturing SO2 present in gases originating from cells for the industrial production of aluminum by igneous electrolysis, implemented over a group of at least two reactors passed through in parallel by a gas stream and supplied with a powdered sorption agent capable of adsorbing effluents present in the gas stream by placing the sorption agent in contact with the gas stream, each reactor having collection elements for collecting the sorption agent after contact with the gas stream, at least one of the reactors having discharge elements for discharging the sorption agent after contact with the gas stream to injection elements for injecting into at least another one of the reactors; and desorbing elements located between the discharge elements and the injection elements, for desorbing the SO2 adsorbed by the sorption agent before it reaches the discharge elements.

Description

technical field [0001] The present invention relates to methods for capturing SO present in gases produced in electrolytic cells 2 Method and apparatus for the industrial production of aluminum by igneous electrolysis. The process is carried out by means of a set of at least two reactors connected in parallel and having a gas flow through them, and supplying, at least partly in series, an adsorbent agent of the pulverulent material type, in particular alumina particles, capable of Adsorbs effluent present in the gas stream. Background technique [0002] The use of alumina particles in gas treatment reactors is a well-known and effective technology for the adsorption of hydrofluoric acid (HF) present in the gases released from electrolytic cells for the industrial production of aluminum by pyrogenic electrolysis. It is well known that with a large adsorption surface area (up to 82m 2 / g) of alumina can in some cases also be able to adsorb sulfur dioxide (SO 2 ). [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50C25C3/22B01D53/68
CPCB01J2219/00038B01D2257/2047B01D2253/104B01D53/83B01D2257/302B01D2258/025B01D53/12B01D53/508B01D53/685C25C3/22B01J2219/0004
Inventor 埃尔-哈尼·鲍哈比拉西埃里·马拉德
Owner SOLIOS ENVIRONNEMENT
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