Impregnator

The sudden expansion allows the chemicals to penetrate the chips homogeneously. The fully impregnated chips are elevated above the level of the liquid by twin-screws.

An impregnator is placed as a mixer between the plug-screw feeder and the screw conveyor to a reaction bin.

• The plug from a screw feeder is broke up by a conical anti-backflow mechanism
• Two counter-rotating screws elevate and mix the chips with a mixture of chemicals and water, added at the chip inlet of the vessel
• The impregnated chips then fall down into a screw conveyor to a retention bin