Patent ID: 8409357
Filing Date: 2013-04-02
Classification: D21C,F15D,Y10T

Abstract:
1. A method for reducing fouling in processing of lignocellulosic biomass, comprising: transporting a fouling fluid comprising lignocellulosic biomass under pressure through an apparatus during processing of the biomass, the apparatus comprising: a passageway having at least two stages; a retractable valve positioned in at least one of: an alternating orientation or at an orientation of about 180 degrees relative to each other, in each of said at least two stages; and an optional shutoff valve positioned in said passageway; wherein said retractable valves form a tortuous path in said passageway when said retractable valves are partially closed to permit a pressure drop between said stages; and retracting at least one of said retractable valves to an open position to form an open retractable valve when another of said retractable valves is partially closed to clean said open retractable valve and to control pressure and reduce fouling in said apparatus.