A combine harvester tailings return system includes a tailings conveyor and an ejection channel for depositing tailings upstream of a cleaning system. A proximity sensor is mounted to the ejection channel and is configured to sense the height of a layer of tailings during transit through the returns system.

A system for conveying pasty material through a conduit has an eccentric screw pump having a stator, a rotor that rotates in the stator, a housing with an intake port, and an output port connected to the conduit. A drive rotates the rotor and thereby draws the pasty material in through the intake port and expels the drawn-in material as a compressed-material strand into the conduit. A valve supplies gas pulses to the conduit at time intervals for separating the compressed-material strand into material plugs of limited length traveling through the conduit.

A screw conveyor assembly includes a first screw conveyor with a first housing and a first conveyor screw arranged therein, a second screw conveyor with a second housing and a second conveyor screw arranged therein, a transition housing to which the first housing and the second housing are connected forming a transition angle, and a runner disposed in the transition housing and arranged to conduct material being conveyed from the first conveyor screw to the second conveyor screw. The first conveyor screw is arranged upstream of the second conveyor screw. An additional conveyor element is disposed on a helix of the first conveyor screw, such that the helix is directly adjacent to the transition housing.

The present invention relates to a pyrolysis apparatus comprising a pyrolysis chamber have a first end and a second end, a feed inlet connected adjacent the first end of the pyrolysis chamber, a biochar outlet connected adjacent the second end of the pyrolysis chamber, and a gas outlet in fluid communication with the pyrolysis chamber. The pyrolysis chamber and feed inlet further comprise centreless screw conveyors. The present invention alleviates the problems associated with dust, oils and tars being present in the generated syngas. The present invention can also be used in a method of continuously processing biomass.

A screw conveyor based fabric dyeing machine including a machine body inside which a screw conveyor including a conveying screw and a fabric support board is arranged and generally parallel to an extension direction of the machine body. Fabric moves through a dyeing tube arranged with the machine body to fall down onto the screw conveyor so that the fabric can be conveyed by the screw conveyor forward through the machine body to reach a guide roller and a nozzle to complete a cycle of circulation for subsequently re-entering the dyeing tube to be dyed therein. As such, water consumption can be reduced and dyeing performance is enhanced, achieving energy saving and carbon reduction, reducing contamination to the surroundings, and realizing green economy.

A conveying apparatus suitable for sturdy articles, in particular flattened plastic bottles or the like, in a recycling plant, has an upwardly moving continuous conveyor that includes a horizontal conveyor and a vertical conveyor connected to the horizontal conveyor, both conveyors having a tubular housing in which a respective conveying screw is rotatably mounted. The inner wall of the tubular housing of the vertical conveyor and the associated conveying screw have a vertical driver bar disposed therebetween, projecting radially inward from the tubular housing and spaced from the conveying screw by a distance (a). The driver bar has cutting teeth on its longitudinal edge located at least facing the conveying screw. Preferably, the driver bar is fastened in an interchangeable manner on the vertical tubular housing and has cutting teeth on both longitudinal edges.

A screw conveyor (90, 91, 92) for a drying apparatus (1) or a fermentation system is disclosed. The screw conveyor includes a helical element (11) having a longitudinal axis (x) and including a primary spiral (12) and a secondary spiral (13) mounted on the primary spiral and rotatable with respect to the primary spiral around the longitudinal axis; and a set of elongated members (20) spanning the primary and secondary spirals.

A combination weigher includes: a dispersion unit adapted to radially disperse food products dropped in from above and onto the dispersion unit; a plurality of V-shaped like guide structures extending radially away from a center of the dispersion unit and arranged such that a narrower end of the V-shaped like guide structures face a center point of the dispersion unit; a plurality of hoppers associated to each of the trenches arranged below the outfeed ends of the trenches; and a control unit; and screw feeders arranged in each of the trenches operated by the control unit. The space between adjacent V-shaped like guide structures at a distance R1 defines a buffer zone for radially dispersed food products from the dispersion unit. The screw feeders in the adjacent trenches have opposite orientation and rotate in opposite directions such that upper part of the screw feeders are rotating away from each other.

A screw conveyor to convey powdery material, in particular cement. The screw conveyor comprises: a transfer screw; and a trough containing the transfer screw; the trough being provided with an inlet section and an outlet section of the powdery material.

The screw conveyor is characterized in that the screw comprises: at least a first screw portion having a first law of continuous variation of the pitches of the screw, which can be graphically represented by means of a first function having in at least one stretch a first derivative other than zero; and at least a second screw portion having a second law of continuous variation of the pitches of the screw, which can be graphically represented by a second function having in at least one stretch a first derivative other than zero. The first law of continuous variation of the pitches is different from the second law of continuous variation of the pitches.

An extraction system for transporting in a longitudinal advancing direction (E) an orderly flow of articles, in particular containers (100), with a support plane (40), a first helical screw (10) and a second helical screw (20), for transporting an orderly flow of articles