Patent ID: 9004742
Filing Date: 2015-04-14
Classification: B65D,B65G,C08H,C13K,D21C,D21D,Y02E

Abstract:
1. A holding tank apparatus for preparing a cellulosic feedstock, comprising: (a) at least one sidewall defining a volume having an upper portion and a lower portion; (b) at least one inlet adjacent the upper portion; (c) at least a one outlet adjacent the lower portion, at an elevation below the inlet; and, (d) a plurality of screw conveyors comprising a first pair of screw conveyors and a second pair of screw conveyors for conveying the cellulosic feedstock laterally across the outlet, the first and second pairs of screw conveyors having a variable pitch along their respective lengths, wherein the first pair of screw conveyors convey cellulosic feedstock in a first direction and the second pair of screw conveyors conveys cellulosic feedstock in an opposite direction.