B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/86 (2006.01) B01D 53/88 (2006.01) B01J 10/00 (2006.01) B01J 19/24 (2006.01) C01B 5/00 (2006.01) G21C 9/06 (2006.01)
Patent
CA 2418375
In a method for the catalytic oxidation of a gas, the required expenditure should be kept as low as possible even with a reliable treatment of comparatively large amounts of gas and/or high concentrations of gas portions that require treatment. To this end, according to the invention, a gas flow (G) comprising the gas to be treated is circulated via a reaction zone (4) and via a reflux zone 6 communicating with it at the inlet and outlet end. An especially effective maintenance of the circulation of the gas flow can be obtained thereby in the manner of a passive system by preferably conveying the gas flow (G) comprising the gas to be treated in the reaction zone (4) in an upward direction and by assisting the upward flow convectively by means of the heat released during the oxidation reaction. Furthermore, the gas flow (G) is preferably cooled locally in the reflux zone (6) by spray cooling.
Dans une méthode d'oxydation catalytique d'un gaz, la dépense doit être maintenue aussi faible que possible, même avec un traitement fiable de quantités relativement importantes de gaz et/ou de fortes concentrations des parties de gaz qui nécessitent un traitement. € cette fin, selon l'invention, un flux de gaz (G) comprenant le gaz à traiter est distribué par l'intermédiaire d'une zone de réaction (4) et d'une zone de reflux 6 communiquant avec elle aux extrémités d'entrée et de sortie. On peut maintenir de manière particulièrement efficace la circulation du flux de gaz à la manière d'un système passif de préférence par transport du flux de gaz (G) comprenant le gaz à traiter dans la zone de réaction (4) dans une direction ascendante et en aidant le flux ascendant par convection au moyen de la chaleur dégagée pendant la réaction d'oxydation. Par ailleurs, le flux de gaz (G) est de préférence refroidi localement dans la zone de reflux (6) par refroidissement par arrosage.
Areva Np Gmbh
Fetherstonhaugh & Co.
Framatome Anp Gmbh
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