A crushing apparatus and a method for mechanically pretreating moist biomass for use in manufacturing bioalcohols.

摘要

A crushing apparatus (1;14;19) and a method serves for mechanically pretreating moist biomass for use in manufacturing bioalcohols. The apparatus includes a piston member (2;2') comprising a piston rod (4;4') with at least a first piston head (5) at a first end of the piston rod (4), a cylinder barrel (3,3') with at least a first cylinder barrel part (3) inside which at least the first piston head (5) reciprocates, the first cylinder barrel part (3) has a first inlet (9) for charging biomass (8) in a retracted position of the first piston head (5) and a first outlet (7) configured as a first slot opening (7) provided in a first end wall (6) at a first end of the first cylinder barrel part (3) facing the first piston head (5) The slot openings are very narrow so that when the piston head batter against is biomass slurry jets are ejected at high pressure. The jets may be directed against a target means to promote even further disintegration. The apparatus may be configured with a bidirectional double acting piston member with piston heads arranged at opposite ends of a common piston rod, in order to double production efficiency without doubling costs.