Method for in-situ modernization of a urea synthesis reactor

Details Method for in-situ modernization of a urea synthesis reactor Method for in-situ modernization of a urea synthesis reactor

B - Operations, Transporting

01

J

B01J 10/00 (2006.01) B01D 3/22 (2006.01) B01J 3/04 (2006.01) B01J 19/00 (2006.01) B01J 19/24 (2006.01) C07C 237/04 (2006.01) C07C 273/04 (2006.01)

Patent

CA 2198239

A method for in-situ modernization of a reactor for urea synthesis at high pressure and temperature of the type wherein a co-current flow of a gaseous phase and a liquid phase takes place, comprising a vertical tubular shell (2) in which is supported a plurality of horizontal perforated plates (6a-6f), calls for the step of providing on at least one of the perforated plates (6a- 6f) a plurality of structurally independent caps (8) having at the top a plurality of holes (11) and forming with the plate a plurality of lateral apertures (13). Advantageously, the holes (11) and the apertures (13) define respective preferential paths of the gaseous phase and the liquid phase respectively, to achieve intimate mixing thereof.

L'invention, qui concerne un procédé de modernisation in situ d'un réacteur effectuant la synthèse de l'urée, fonctionnant à haute pression et à température élevée, du type dans lequel il existe un écoulement parallèle en phase gazeuse et en phase liquide, comportant un corps tubulaire vertical (2) dans lequel prend appui une pluralité de plateaux perforés horizontaux (6a, 6f), préconise, comme mesure de modernisation, de munir l'un au moins de ces plateaux (6a, 6f) d'une multiplicité de capuchons de structure indépendante (8) comportant sur le dessus un grand nombre de trous (11) et formant avec le plateau une pluralité d'ouvertures latérales (13). Ces trous (11) et ces ouvertures (13) présentent l'avantage de définir des trajectoires préférentielles respectives pour le courant en phase gazeuse et le courant en phase liquide, respectivement, aux fins de leur mélange intime.

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