A method and device for emptying the floor of a black liquor...

D - Textiles – Paper – 21 – C

Patent

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Details

D21C 11/12 (2006.01) F04F 5/24 (2006.01) F04F 5/44 (2006.01) F27D 3/14 (2006.01)

Patent

CA 2745710

The invention is related to a method for emptying a furnace floor from smelt in a black liquor recovery boiler when the black liquor recovery boiler is being shut down. The emptying can be started while smelt is still flowing in smelt spouts. The floor is emptied by sucking smelt from the furnace with a smelt eductor. The invention is also related to a device for removing smelt and wash water from a furnace of a black liquor recovery boiler by means of suction. Negative pressure is generated in the device by conducting pressurized gas into a suction pipe of an eductor so that preheated pressurized gas is discharged in the dis-charge direction of smelt and wash water.

L'invention porte sur un procédé de vidange de produit de fusion de la sole d'un four dans une chaudière de récupération de liqueur noire lorsque la chaudière de récupération de liqueur noire est arrêtée. On peut entamer la vidange alors que le produit de fusion s'écoule encore dans des bacs pour produit de fusion. On vide la sole par aspiration du produit de fusion à partir du four à l'aide d'un éjecteur de produit de fusion. L'invention porte également sur un dispositif destiné à retirer le produit de fusion et l'eau de lavage du four d'une chaudière de récupération de liqueur noire par aspiration. On génère une pression négative dans le dispositif en amenant un gaz sous pression dans le tuyau d'aspiration d'un éjecteur de telle sorte qu'un gaz sous pression préchauffé est éjecté dans la direction déjection du produit de fusion et de l'eau de lavage.

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