Method for treating hydrogen sulfide-containing waste gases

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 17/02 (2006.01) B01D 53/52 (2006.01) B01D 53/86 (2006.01) C01B 17/04 (2006.01) C01B 17/05 (2006.01)

Patent

CA 2445139

A method is provided for removing hydrogen sulfide out of liquid sulfur. Liquid sulfur is introduced into a containment vessel (40) in an amount to partially fill this containment vessel and create a hydrogen sulfide- containing liquid sulfur phase and a hydrogen sulfide-containing liquid sulfur (123) and a hydrogen sulfide-containing vapor (158). A portion of the hydrogen sulfide-containing liquid sulfur is transferred into an oxidation vessel (126) where the liquid sulfur is treated with an oxidizing gas (132) to produce a hydrogen suflide-containing gas (148) at a pressure of at least 60 p.s.i. which is forwarded to an eductor (156). This eductor used the hydrogen sulfide- containing gas (162) from the containment vessel (40) as the sweep gas, rather than compressed air or steam.

L'invention concerne un procédé destiné à extraire le sulfure d'hydrogène d'un sulfure liquide. On introduit le sulfure liquide dans une cuve de confinement (40) en quantité suffisante pour remplir partiellement cette cuve de confinement et pour produire une phase de sulfure liquide contenant du sulfure d'hydrogène, un sulfure liquide contenant du sulfure d'hydrogène (123), ainsi qu'une vapeur contenant du sulfure d'hydrogène (158). Une partie du sulfure liquide contenant du sulfure d'hydrogène est transférée dans une cuve d'oxydation (126) afin d'y subir un traitement au moyen d'un gaz d'oxydation (132), d'où la production d'un gaz contenant du sulfure d'hydrogène (148) à une pression d'au moins 60 psi, ce gaz étant alors transféré vers un éjecteur (156). A la place de la vapeur ou de l'air comprimé, cet éjecteur utilise le gaz contenant du sulfure d'hydrogène (162) provenant de la cuve de confinement (40) comme gaz d'entraînement.

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