Method for adjusting the chlorine equilibrium in a sulphate...

D - Textiles – Paper – 21 – C

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D21C 11/00 (2006.01) D21C 11/06 (2006.01) D21C 11/12 (2006.01)

Patent

CA 2167820

A method for adjusting the chlorine equilibrium in a sulphate cellulose process, wherein part of the chlorine contained in the cycle is separated and removed. In the method, strong odour gases from the sulphate cellulose process are introduced into a soda recovery boiler for burning so that chlorine contained in the liquor is in the form of hydrogen chloride (HCl) in the upper part of the soda recovery boiler and can subsequently be separated from the flue gases in a flue gas scrubber. The chlorine equilibrium is adjusted by removing part of the chlorine-containing washing solution.

Procédé de contrôle de l'équilibre en chlore dans un processus de production de sulfate de cellulose, dans lequel une partie du chlore contenu dans le cycle est séparé puis extrait. Dans ce procédé, les gaz à odeur forte créés pendant le processus de production du sulfate de cellulose sont introduits dans une chaudière de récupération de soude et brûlés, de sorte que le chlore présent dans la liqueur, qui se retrouve sous forme de chlorure d'hydrogène (HCI) dans la partie supérieure de la chaudière, peut être ensuite séparé des fumées dans un épurateur de fumées. On règle l'équilibre en chlore en retirant une partie de la solution de lavage riche en chlore.

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