B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 15/00 (2006.01) B30B 11/22 (2006.01) B30B 15/32 (2006.01)
Patent
CA 2710265
An apparatus is provided for compressing a loose solid feedstock. The apparatus includes a two stage compressor. The first compression stage is a screw compressor. The second compressor stage is a reciprocating compressor. The reciprocating compressor operates co-axially with, and receives its feed from, the screw compressor. A choke cone maintains pressure in the outfeed from the compressor stages. The reciprocating compressor includes a piston that is driven by a pair of hydraulic rams. The position and operation of the hydraulic rams, the screw conveyor, and the choke cone is monitored by sensors. The reciprocating compressor, the screw conveyor, and the choke cone are all adjustable in real time to control the compression of the feedstock according to a pre-programmed schedule that need not have equal compression and retraction strokes. The operation of the screw conveyor may be advanced or eased off depending on the motion of the reciprocating compressor. The operation of the choke cone may be actively controlled to obtain a coordination with the compressor stages.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Mascoma Canada Inc.
Sunopta Bioprocess Inc.
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