Process for preparing sulfur from a fuel off-gas and at...

Details Process for preparing sulfur from a fuel off-gas and at... Process for preparing sulfur from a fuel off-gas and at...

C - Chemistry, Metallurgy

01

B

C01B 17/04 (2006.01) B01D 53/52 (2006.01) B01J 19/24 (2006.01) B01D 53/36 (1990.01)

Patent

CA 2086232

A combustible effluent is burned in surplus air in a first area (2) of a thermal reaction stage (1), a first acidic gas flow is injected (13, 43) into the combustion fumes in said area (2), a second acidic gas flow is partially burned (9) in a second area (3) of the thermal stage which receives gases from said first zone (2), and with a controlled amount of air (11, 12) so as to achieve an H2S:SO2 molar ratio of 2:1 in the output gases from a Claus catalytic stage (19) which processes the gas flow from the thermal stage (1), and the acidic gas flow rates between the two areas (2, 3) are adjusted to obtain a flame temperature of over 850 °C in said second area (3).

On effectue une combustion de l'effluent combustible en excès d'air dans une première zone (2) d'un étage de réaction thermique (1), on injecte (13,43) un premier courant de gaz acide dans les fumées de combustion dans la zone (2), on brûle partiellement (9) un deuxième courant de gaz acide dans une deuxième zone (3) de l'étage thermique, qui reçoit les produits gazeux de la zone (2) avec une quantité contrôlée d'air (11, 12) propre à donner un rapport molaire H2S:SO2 de 2:1 dans les gaz sortant d'un étage catalytique CLAUS (19) traitant le flux gazeux issu de l'étage thermique (1) et on ajuste les débits des courants de gaz acide entre les deux zones (2,3) pour obtenir une température de flamme supérieure à 850°C dans la zone (3) .

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