Abstract: A method and a device classifies splinters and wood chips. The device includes a centrifugal classifying unit, a countercurrent classifying unit, a separating funnel for the coarse fraction and a separating cyclone for the fine fraction. A gas or a gas mixture is circulated in the system via a blower. It is tangentially introduced into the lower classifying chamber, initially flows through the countercurrent classifier, through the gaps between the blades of the centrifugal classifier and then into the separating cyclone before being returned to the blower.

Abstract: In a method and a device for discharging poorly pourable bulk materials from a receptacle, the material is first rendered free-flowing via a helically shaped agitating element (worm conveyer) and secondly discharged from the receptacle via a spiral shaped agitation element (spiral conveyer). Both elements are mechanically coupled at their respective lose ends. The respective other ends of the agitating elements are attached to a common shaft. The shaft connects to a gear drive at its upper end which provides for the rotational movement of the two agitating agents. The rotation of the worm conveyor transports the material situated between the turns of the worm conveyer upward to the bulk material surface. This breaks up the bulk material. Material that has been brought up by the worm conveyer flows downward again due to the gravitational force. Some of the material flows back along the outer space around the worm conveyer while the other portion moves down through the center of the worm conveyer.

Abstract: The invention pertains to a method and a device for classifying splinters and wood chips. Splinters and wood chips accumulating in a saw mill are usually subjected to a classification process, i.e., the initial mixture of splinters and wood chips of different sizes is separated in accordance with particle size or settling velocity in a large-scale separation process. The inventive device consists of a centrifugal classifying unit, a countercurrent classifying unit, a separating funnel for the coarse fraction and a separating cyclone for the fine fraction. A gas or a gas mixture is circulated in the system by means of a blower. It is tangentially introduced into the lower classifying chamber, initially flows through the countercurrent classifier, through the gaps between the blades of the centrifugal classifier and then into the separating cyclone before being returned to the blower.

Abstract: The invention pertains to a method and a device for discharging poorly pourable bulk materials such as, in particular, sawdust, splinters and wood chips from a receptacle. According to the invention, the poorly pourable bulk material in the receptacle is rendered free-flowing by means of a first helical agitating element and discharged from the receptacle by means of a second helical agitating element. In this case, it is particularly advantageous that the first helical agitating element and the second helical agitating element are mechanically coupled to one another such that only one drive is required for both agitating elements. The first agitating element consists of a shaft and a worm conveyor, and the second agitating element consists of a shaft and a spiral conveyor. The rotation of the worm conveyor causes the material situated in the outer region of the receptacle to be transported upward to the bulk material surface. This breaks up the bulk material.