Patent ID: 8968580
Filing Date: 2015-03-03
Classification: B03D

Abstract:
1. A pumpbox apparatus for processing a feedstock stream, the apparatus comprising: a reservoir having a first inlet for receiving the feedstock stream and a second inlet for receiving a water stream, the reservoir being in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir, the reservoir being operable to accumulate the feedstock stream and the water stream to a first liquid level in the reservoir while withdrawing a discharge stream through the discharge outlet to cause a flow of liquid through the pumpbox, the first inlet being located above the second inlet and defining a first flow region between the first inlet and the second inlet, the second inlet being located above the discharge outlet and defining a second flow region between the second inlet and the discharge outlet, a first flow velocity in the first flow region being lower than a second flow velocity in the second flow region to facilitate flotation of a low specific gravity portion of the feedstock through the first flow region toward an upper surface of the liquid accumulated in the reservoir; and a collector for collecting at least a portion of the low specific gravity portion from an upper surface of the accumulated volume when the first liquid level is above the first inlet.