Two-stage quench scrubber

B - Operations – Transporting – 01 – D

Patent

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B01D 35/18 (2006.01)

Patent

CA 2632397

Contemplated configurations and methods for flue gas treatment comprise a quench section and a scrubbing section that are configured and operated to avoid net condensation of water from the quenched flue gas in the scrubbing section. Consequently, the active agent in the scrubbing medium can be maintained at high concentration and will so allow continuous removal of SOX and NOX to very low concentrations. Moreover, as the scrubbing medium is not diluted by condensate, loss of active agent can be substantially reduced. Especially preferred systems will reduce SO2 concentrations in flue gas to less than 5 ppm, and more typically less than 3 ppm while substantially reducing water and reagent consumption

L'invention concerne des configurations prévues et des procédés destinés au traitement de gaz de carneau comprenant une section de trempage et une section d'épuration conçues et exploitées de manière à éviter une condensation nette de l'eau du gaz de carneau trempé dans la section d'épuration. Par conséquent, l'agent actif dans le support d'épuration peut être maintenu à une concentration élevée et permettre ainsi l'élimination continue de SOX et de NOX à des concentrations très faibles. En outre, étant donné que le support d'épuration n'est pas dilué par un condensat, la perte d'agent actif peut être sensiblement réduite. Des systèmes particulièrement préférés vont réduire les concentrations de SO2 dans le gaz de carneau à moins de 5 ppm, et plus généralement à moins de 3 ppm tout en réduisant sensiblement la consommation d'eau et de réactif.

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