Venturi scrubber and method with optimized remote spray

Details Venturi scrubber and method with optimized remote spray Venturi scrubber and method with optimized remote spray

B - Operations, Transporting

01

D

B01D 47/10 (2006.01)

Patent

CA 2202254

An air pollution control system incorporating a venturi scrubber (40) and a method of cleansing a particulate-laden, contaminated gas flow are disclosed. Spray nozzles (35) are used to introduce optimized droplets of a scrubbing liquid into the venturi to maximize the collection efficiency for optically active particles. The spray nozzles introduce the optimized droplets substantially upstream of the throat (50) of the venturi such that the spray mixes with the effluent gas flow and cools the gas flow to substantially its saturation temperature prior to entering the venturi throat. This promotes collection of condensibles and inhibits the revolatilization of contaminants that are collected by the scrubbing droplets which might otherwise evaporate in the hot gas flow. The optimized droplets are highly effective in rapidly cooling the effluent gas flow.

L'invention concerne un système d'épuration de l'air comprenant un épurateur à Venturi (40) et un procédé d'épuration d'un gaz pollué chargé de particules. Les buses d'injection (35) sont utilisées pour introduire des gouttelettes optimisées d'un liquide d'épuration dans le Venturi permettant de recueillir d'une manière optimale les particules optiquement actives. Les buses de pulvérisation introduisent les gouttelettes optimisées sensiblement en amont de la gorge (50) du Venturi, pour que le liquide pulvérisé se mélange avec le gaz pollué et refroidisse le gaz à une température correspondant sensiblement à la température de saturation, avant d'entrer dans la gorge du Venturi. Ceci facilite l'absorption des matières condensables et empêche une volatilisation subséquente des substances polluantes recueillies par les gouttelettes d'eau qui, autrement, pourraient s'évaporer dans le flux de gaz chaud. Les gouttelettes optimisées sont très efficaces pour refroidir rapidement le gaz pollué.

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