Method and plant for removing slag accumulating in...

B - Operations – Transporting – 01 – J

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B01J 8/00 (2006.01) C10J 3/52 (2006.01)

Patent

CA 2712623

A method for removing slag accumulating in particular during synthesis gas recovery from slag present in a pressurized container bath in a collecting tank for the slag, in the direction of gravity under the slag bath, wherein optionally a mechanism for breaking the slag is provided under the slag bath and a sluice valve is provided between the containers, is to clearly improve the corresponding processes and plants of the relevant kinds by improving withdrawal of slag and by preventing environmentally harmful exhaust vapors or waste gases. This is achieved in that a space that is in contact with the liquid in the containers and is filled with a gas bubble is provided, in particular an annular space or a separate container, in which the pressure of the gas bubble is controlled by gas supply such that at least part of the water present in the slag sluice/collection space flows through the slag bath valve against the direction of gravity in the direction of the slag bath when the slag bath valve is opened.

L'invention concerne un procédé d'extraction de scories notamment produites lors de la fabrication de gaz de synthèse, hors d'un contenant de bain de scories situé dans un contenant sous pression, vers un contenant collecteur pour les scories situé sous le bain de scories, dans le sens de la gravité. Un dispositif de broyage des scories est éventuellement prévu sous le bain de scories et une soupape à sas est prévue entre les contenants. L'invention vise à améliorer considérablement lesdits procédé et dispositif avec amélioration de l'extraction de scories et suppression de vapeurs ou de gaz d'échappement polluants. A cet effet, le dispositif selon l'invention comporte un espace rempli d'une poche de gaz, notamment un espace annulaire ou un contenant séparé, se trouvant en contact avec le liquide dans les contenants, dans lequel la pression de la poche de gaz est régulée par apport de gaz de telle manière qu'au moins une partie de l'eau contenue dans le sas/espace de collecte de scories parcourt la soupape de bain de scories, lors de l'ouverture de celle-ci, en direction du bain de scories, contre le sens de la gravité.

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