Method and device for capturing fine particles by trapping in a solid mixture of carbon dioxide snow type

   
   

The invention concerns a method for capturing very fine particles present in a fluid flux in liquid, gaseous or supercritical state and a device therefor. The method is characterized in that it comprises steps which consist in: causing said flux to pass through a filtering element (13); stopping the emission of said flux; countercurrent clearing of the filtering material (31) with a carbon dioxide flow under pressure, so as to drive the particles deposited on the filtering material (31); countercurrent expanding of the flux, so as to trap the particles within a solid carbon dioxide snow-type mixture formed during its expansion.

A invenção concerne um método para capturar as partículas muito finas atuais em um fluxo fluido no líquido, estado gasoso ou supercritical e um dispositivo therefor. O método é caracterizado que compreende as etapas em que consista: fazendo com que o fluxo dito passe através de um elemento filtrando (13); parando a emissão de fluxo dito; clearing countercurrent do material filtrando (31) com um fluxo do dióxido de carbono sob a pressão, para dirigir as partículas depositadas no material filtrando (31); expansão countercurrent do fluxo, para prender as partículas dentro de um neve-tipo contínuo mistura do dióxido de carbono dada forma durante sua expansão.

 
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