Submerged Drainage: A New Concept In Dewatering, 1995 Papermakers Conference Proceedings
Joe Parisian
BLACK CLAWSON-KENNEDY INC.
Submerged Drainage is a new technology in wet end dewatering, that replaces conventional gravity foil boxes and low-vat boxes. Submerged Drainage works on the principle of a syphon, gently draining water from the web into the water, instead of into air. Pilot Machine trials have shown that this technology provides a greater drainage capacity than conventional drainage boxes, together with improved retention of fiber, fines and fillers. The drainage rate can be adjusted with a level controller. The unit is very efficient, and products a sheet with very low porosity.