Wet Scrubber Process
The air flow from the fume cupboard (or other source) is split into 2 equal air streams before entering the fume scrubber at the top of the two outer co-current packed sections. The air passes through a Vane-type mist eliminator before entering the random packed bed of 1” Pall rings. The air flow travels downwards through the wetted packing before turning through 180° into the central chamber. Here the divided air streams come together before passing vertically upwards (counter-currently) through the central wetted packed bed. Having passed through this section and the spray distribution above the packing media the processed airstream enters and passes through a vertical droplet separator before exiting the unit through the flanged outlet connection.
The scrubbing liquor is re-circulated around the scrubber via a magnetically driven polypropylene pump and a PVC pipework system. The base of the unit forms a sump for the re-circulation liquor. The liquor within this reservoir is maintained at a constant level by the continuous addition of fresh water from the automatic fill valve and chemicals from the optional pH dosing system. This counteracts the effect of both evaporation and neutralisation. The sump contents must be regularly disposed of in a suitable chemical drainage system or collection tank to control salts build-up and maintain a fresh scrubbing solution.
The fume scrubber unit is constructed from corrosion resistant plastic materials (polypropylene and PVC), ensuring the fume cupboard can remain fully operational within aggressive chemical environments.