An airflow system for a waste conveyor, having a conveyor enclosure with a bottom side configured for being mounted above a conveyor surface. One or more air flow unit enclosures are mounted to the conveyor enclosure. Each air flow unit enclosure has a divergent channel with a channel intake end fluidly connected to the air exhaust and a channel discharge end configured for providing a stream of air (Q) toward the conveyor surface. The divergent channel has a widening cross section (Xd) in a downstream air direction (D) between the channel intake end and the channel discharge end of the divergent channel, and is arranged at an angle () larger than 0 and smaller than 45 degrees with respect to the bottom side of the conveyor enclosure.

A dry granular material transfer system and method for transfer of granular material such as sand in a dry state through a hose using pressurized air. On a base platform, a conveyor subsystem moves granular material placed on a lower portion to a higher portion while separating clumped material and allowing rocks and debris to fall away, spreading the granular material in a thin layer for ejection at the highest level. A containment subsystem receives granular material and contains the downward fall of material. A portioning subsystem has a turntable with blow-through chambers which receive granular material and move into line with an air inflow tube and air-material outflow tube, and the air-material mixture is blown through the air-material outflow tube and through a transfer hose.

Provided is a conveyor such that, after stopping or restricting supply of granular material to a downstream device, it is possible to restart normal operation of conveying the granular material without delay. This conveyor includes: a casing having a conveying path of a granular material therein and having a discharge port for discharging the granular material to a downstream device; a plurality of conveying units accommodated in the casing and configured to convey the granular material to the discharge port by circulating along the conveying path; an opening/closing mechanism that opens and closes the discharge port; and a control unit that controls operation of the plurality of conveying units and the opening/closing mechanism. When restricting supply of the granular material to the downstream device, the control unit controls the opening/closing mechanism to close the discharge port, and continues to circulate the plurality of conveying units, thereby continuing to move the granular material along the conveying path.

An ejection hood apparatus includes a transfer conduit and a hood. The transfer conduit includes a downwardly concave control shell. An inlet end portion of the transfer conduit receives an upwardly directed transfer air stream including ejected material with at least a partially upward trajectory. The hood defines an ejection chamber including a lower chamber portion and an upper chamber portion. The lower chamber portion receives the transfer air stream from an outlet end portion of the transfer conduit with at least a partially downward trajectory. The hood includes at least one air outlet passage communicated with the upper chamber portion for exhausting at least a portion of the transfer air stream.

An ejection hood apparatus includes a transfer conduit and a hood. The transfer conduit includes a downwardly concave control shell. An inlet end portion of the transfer conduit receives an upwardly directed transfer air stream including ejected material with at least a partially upward trajectory. The hood defines an ejection chamber including a lower chamber portion and an upper chamber portion. The lower chamber portion receives the transfer air stream from an outlet end portion of the transfer conduit with at least a partially downward trajectory. The hood includes at least one air outlet passage communicated with the upper chamber portion for exhausting at least a portion of the transfer air stream.

An ejection hood apparatus includes a transfer conduit and a hood. The transfer conduit includes a downwardly concave control shell. An inlet end portion of the transfer conduit receives an upwardly directed transfer air stream including ejected material with at least a partially upward trajectory. The hood defines an ejection chamber including a lower chamber portion and an upper chamber portion. The lower chamber portion receives the transfer air stream from an outlet end portion of the transfer conduit with at least a partially downward trajectory. The hood includes at least one air outlet passage communicated with the upper chamber portion for exhausting at least a portion of the transfer air stream.

An ejection hood apparatus includes a transfer conduit and a hood. The transfer conduit includes a downwardly concave control shell. An inlet end portion of the transfer conduit receives an upwardly directed transfer air stream including ejected material with at least a partially upward trajectory. The hood defines an ejection chamber including a lower chamber portion and an upper chamber portion. The lower chamber portion receives the transfer air stream from an outlet end portion of the transfer conduit with at least a partially downward trajectory. The hood includes at least one air outlet passage communicated with the upper chamber portion for exhausting at least a portion of the transfer air stream.

A device for transforming a continuous and controlled flow of absorbent material in granules into an intermittent flow for providing the material to a receiving member movable along a direction X, including a feed manifold, an outlet and a main body, placed between the feed manifold and the outlet, configured to cause the absorbent material to flow along a direction (Y-Y) coinciding with the respective axes of symmetry of the feed manifold, the outlet nozzle and the main body; wherein within the main body a movable element is housed, capable of moving alternately between a first and a second working position, such that when the movable element is in the first position, it forms a first accumulation chamber of the material, and a first discharge duct of the material, and when the movable element is in the second position, it forms a second accumulation chamber and a second discharge duct.

A device for transforming a continuous and controlled flow of absorbent material in granules into an intermittent flow for providing the material to a receiving member movable along a direction X, including a feed manifold, an outlet and a main body, placed between the feed manifold and the outlet, configured to cause the absorbent material to flow along a direction (Y-Y) coinciding with the respective axes of symmetry of the feed manifold, the outlet nozzle and the main body; wherein within the main body a movable element is housed, capable of moving alternately between a first and a second working position, such that when the movable element is in the first position, it forms a first accumulation chamber of the material, and a first discharge duct of the material, and when the movable element is in the second position, it forms a second accumulation chamber and a second discharge duct.

A pneumatic conveyor for transporting bulk materials, in particular tablets, has a compressor for conveyor gas and has a bulk material feed and a conveyor line, in particular hose, arranged therebetween, and a bulk material discharge. To prevent contamination of the environment during operation, a shut-off device is provided between a collection volume and the conveyor line. A method for operating a pneumatic conveyor conveys sample volumes intermittently.