A scrubber for the treatment of flue gases

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 53/18 (2006.01) B01D 53/14 (2006.01) B01D 53/50 (2006.01) B01D 53/60 (2006.01) B01D 53/62 (2006.01) B01D 53/68 (2006.01)

Patent

CA 2308224

The invention relates to a novel and most efficient scrubber for the treatment of flue gases from power generation plants or from chemical plants, in order to absorb objectionable impurities, such as SO2, SO3, HCl, nitrous oxides, into a water-based solution, in which solids are not substantially precipitated. The novel scrubber comprises: a horizontal chamber, with a basis rectangular vertical cross section, divided along the horizontal axis into a number of compartments by vertically- draining demisters covering the whole vertical cross section; a shallow liquid-collecting sump in each compartment, which can be sloped in any convenient direction; a pump which distributes the liquid from each such sump, at a controlled flow-rate to a series of spray nozzles in the same compartment, generating 3-5 vertical "falling curtains" perpendicularly to the gas flow and covering the whole vertical cross section, while the liquid drops fall back into the sump.

L'invention concerne un nouveau laveur de gaz d'échappement, permettant de traiter plus efficacement les gaz d'échappement provenant de centrales électriques ou d'usines chimiques, afin d'absorber les impuretés indésirables, par exemple SO2, SO3, HC1, ou l'oxyde nitreux, pour les transformer en une solution à base d'eau, dans laquelle les solides ne sont sensiblement pas précipités. Ce nouveau laveur comprend: une chambre horizontale présentant une coupe transversale verticale rectangulaire, divisée le long de l'axe horizontal en plusieurs compartiments grâce à des dispositifs antibuée à drainage vertical, qui recouvrent toute cette coupe transversale verticale; un bac creux destiné à recueillir le liquide dans chaque compartiment, ce bac pouvant être incliné dans n'importe quel sens approprié; et une pompe conçue pour distribuer du liquide selon un certain débit, depuis chaque bac jusqu'à plusieurs buses de pulvérisation, lesquelles sont placées dans le même compartiment, produisant ainsi 3 à 5 "rideaux tombants" verticaux, perpendiculaires au courant gazeux et recouvrant toute ladite coupe transversale verticale, les gouttes de liquide tombant dans ledit bac.

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