Patent ID: 7335008
Filing Date: 2008-02-26
Classification: B30B,Y02E

Abstract:
1. An apparatus for producing woodfuel briquettes, pellets, compounds, composites, agglomerates, or granulates, the apparatus comprising: a pressing screw having screw spirals that rotate around a longitudinal axis and that are arranged Inside a screw shell; a feeding chute for conveying feed material to the pressing screw, the feeding chute being located at an input side; processing tools, which are arranged at an end of the pressing screw and to which the feed material is conveyed by the rotating screw spirals; and an expansion chamber through which escaping steam flow is channeled, the steam being generated in an area of the processing tools by residual moisture in the feed material due to heat being generated during the processing procedure, the expansion chamber having a flow-through cross section at a location of an opening of the screw shell such that it causes the steam flow to decelerate and for allowing particulate matter contained in the escaping steam flow, which escapes into the expansion chamber, to fall back from the expansion chamber into the screw shell.