Compact wastewater concentrator using waste heat

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 1/16 (2006.01) C02F 1/04 (2006.01) C02F 11/12 (2006.01)

Patent

CA 2751720

A compact and portable liquid concentrator includes a gas inlet, a gas exit and a flow corridor connecting the gas inlet and the gas exit, wherein the flow corridor includes a narrowed portion that accelerates the gas through the flow corridor. A liquid inlet injects liquid into the gas stream at a point prior to the narrowed portion so that the gas-liquid mixture is thoroughly mixed within the flow corridor, causing a portion of the liquid to be evaporated. A demister or fluid scrubber downstream of the narrowed portion removes entrained liquid droplets from the gas stream and re- circulates the removed liquid to the liquid inlet through a re-circulating circuit. Fresh liquid to be concentrated is also introduced into the re-circulating circuit at a rate sufficient to offset the amount of liquid evaporated in the flow corridor.

Un concentrateur de liquide compact et portable comprend une entrée de gaz, une sortie de gaz et un conduit de circulation reliant l'entrée de gaz et la sortie de gaz, le conduit de circulation comportant une partie rétrécie qui accélère le gaz à travers le conduit de circulation. Une entrée de liquide injecte du liquide dans le flux de gaz en un point situé avant la partie rétrécie afin que le mélange gaz-liquide se mélange énergiquement dans le conduit de circulation en provoquant l'évaporation d'une partie du liquide à évaporer. Un dévésiculeur ou épurateur de liquide en aval de la partie rétrécie supprime les gouttelettes de liquide entraînées du flux gazeux et renvoie le liquide extrait vers l'entrée de liquide via un circuit de remise en circulation. Du liquide non traité à concentrer est également introduit dans le circuit de remise en circulation à un débit suffisant pour compenser la quantité de liquide évaporée dans le conduit d'écoulement.

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