Method of removing sulfur trioxide from a flue gas stream

B - Operations – Transporting – 01 – D

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B01D 53/50 (2006.01)

Patent

CA 2622064

A method of removing SO3 from a flue gas stream includes providing a reaction compound selected from the group consisting of sodium carbonate, sodium bicarbonate, sodium sesquicarbonate, and mixtures thereof. The reaction compound is injected into the flue gas stream. The temperature of the flue gas is between about 500~ F and about 850~ F. The reaction compound is maintained in contact with the flue gas for a time sufficient to react a portion of the reaction compound with a portion of the SO3 to reduce the concentration of the SO3 in the flue gas stream.

L~invention concerne un procédé d~élimination de SO3 dans un flux de gaz de combustion, ledit procédé comprenant l~utilisation d~un réactif choisi dans le groupe consistant en du carbonate de sodium, du bicarbonate de sodium, du sesquicarbonate de sodium, et les mélanges de ces composés. Le réactif est injecté dans le flux de gaz de combustion. La température des gaz de combustion est comprise entre environ 500 °F et environ 850 °F. Le réactif est maintenu au contact des gaz de combustion pendant une durée suffisante pour qu~une partie du réactif réagisse avec une partie du SO3, de manière à réduire la concentration en SO3 dans le flux de gaz de combustion.

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