A meter module for metering a product in communication with the meter module. The meter module includes a meter housing portion and a lower chamber portion, the meter housing portion having a top opening through which the product enters the meter housing portion. A metering mechanism is disposed in the meter housing portion and is rotatably driven by an electric motor about a longitudinal axis. As the metering mechanism rotates about the longitudinal axis, the metering mechanism meters the product into the lower chamber portion, the metered product exits the lower chamber portion through a bottom opening in the lower chamber portion. The lower chamber portion may include a flow sensor and/or internal structure to capture and weigh the metered product before exiting through the bottom.

A meter module for metering a product in communication with the meter module. The meter module includes a meter housing portion and a lower chamber portion, the meter housing portion having a top opening through which the product enters the meter housing portion. A metering mechanism is disposed in the meter housing portion and is rotatably driven by an electric motor about a longitudinal axis. As the metering mechanism rotates about the longitudinal axis, the metering mechanism meters the product into the lower chamber portion, the metered product exits the lower chamber portion through a bottom opening in the lower chamber portion. The lower chamber portion may include a flow sensor and/or internal structure to capture and weigh the metered product before exiting through the bottom.

There as herein defined a pneumatic conveying system comprising a cyclonic feed apparatus. In particular, there is described a pneumatic conveying system comprising a vessel (e.g. a cyclonic separator) in combination with a sifting device (e.g. a centrifugal device) which is capable of separating pneumatically conveyed material into oversize powder discharge (e.g. waste material) and fine powder discharge (e.g. valuable product material).

The present disclosure relates to methods and system for conveying a slurry which include a mixing tub configured to mix a solid and a liquid to form the slurry, a pump operable to pump the slurry through the conveyance line a distance to the placement site, and a control system operable to adjust a percent of solids of the slurry within the mixing tub based on at least one of a target pump rate or the distance to the placement site.

The present disclosure relates to methods and system for conveying a slurry which include a mixing tub configured to mix a solid and a liquid to form the slurry, a pump operable to pump the slurry through the conveyance line a distance to the placement site, and a control system operable to adjust a percent of solids of the slurry within the mixing tub based on at least one of a target pump rate or the distance to the placement site.

A conveyor for pulverized material comprises in combination a conduit, a screw rotatably mounted within the conduit having an material inlet end and material discharge end, means for rotating the screw, means for supplying material to the screw at the material inlet end, whereby the material will be compacted as it is advanced by the screw to the material discharge end, and means for admitting a gas under pressure to the compacted material at the material discharge end to render it fluent. In a portion of the screw a material seal is formed by the compacted material being advanced by the screw, wherein there are material pockets formed between adjacent screw flights, wherein the pocket size volume is at its maximum nearest the material inlet end and at its minimum nearest the material outlet end, with at least twice as many pockets of minimum size as of maximum size.

A conveyor for pulverized material comprises in combination a conduit, a screw rotatably mounted within the conduit having an material inlet end and material discharge end, means for rotating the screw, means for supplying material to the screw at the material inlet end, whereby the material will be compacted as it is advanced by the screw to the material discharge end, and means for admitting a gas under pressure to the compacted material at the material discharge end to render it fluent. In a portion of the screw a material seal is formed by the compacted material being advanced by the screw, wherein there are material pockets formed between adjacent screw flights, wherein the pocket size volume is at its maximum nearest the material inlet end and at its minimum nearest the material outlet end, with at least twice as many pockets of minimum size as of maximum size.

There is provided a powder feeder (10, 10′) comprising a main chamber (12, 12′) with a gas inlet (14, 14′) and a powder outlet (16), at least one secondary chamber (20, 20′) configured to receive powder and a shaver element (22, 40, 50), wherein the shaver element (22, 40, 50) is positioned directly above an opening (26, 26′) in the at least one secondary chamber (20, 20′). The secondary chamber (20, 20′) further comprises a piston (28, 28′) movable towards the shaver element (22, 40, 50) so as to urge powder upwards. Examples of a shaver element include a rotatable screw (22), a conveyor belt (40) and a rotating disc (50) with protrusions (54).

The invention relates to a method and to a delivery apparatus for carrying out the method, wherein the delivery apparatus comprises an eccentric screw pump having a rotor-stator unit with an outlet, a drive unit, a control device and a delivery section, and wherein the delivery apparatus comprises at least one pressure sensor and a characteristic-variable detection device.

The invention relates to a system and a method for feeding comminuted cellulosic material from a low-pressure zone (P.sub.L) to a high-pressure zone (P.sub.E) with at least 1 bar higher pressure. The invention uses a screw 7 feeder having a feeding screw (1) arranged in a feeding pipe (2). Back blow pulses from the high-pressure zone that may blow 7 backwards from the high-pressure zone (P.sub.E) can be ventilated (Vent.sup.II) in an intermediate part (P.sub.c) of the feeding pipe (2), and thus not reach the low 7-pressure zone.