Device for electrostatic charging of a mixture of granules, associated method and use
AssigneeSkytech
InventorPierre Sommen
Life of this patent
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Abstract
A device for triboelectric charging of a mixture of granules of different materials, the device having a charging chamber with walls delimiting an inner space. The walls define a granule inlet and a granule outlet, the granule inlet and the granule outlet being separated from one another relative to an elevation direction. A blowing device is arranged suitable for generating, in the inner space, an air flow suitable for allowing the granules in the chamber to form a fluidized bed, and a plurality of grids are positioned in the chamber, the grids being suitable for blocking the passage of the granules, the grids forming a set of baffles in the inner space between the granule inlet and the granule outlet.
Claims12
A device for triboelectric charging of a mixture of granules of different materials, the device comprising:
- a charging chamber comprising walls delimiting an inner space, the walls defining a granule inlet and a granule outlet, the granule inlet and the granule outlet being separated from one another relative to an elevation direction,
- a blowing device suitable for generating, in the inner space, an air flow suitable for allowing the granules in the chamber to form a fluidized bed, and
- a plurality of grids positioned in the chamber, the grids being suitable for blocking the passage of the granules, the grids forming a set of baffles in the inner space between the granule inlet and the granule outlet.
A method for triboelectric charging of a mixture of granules of different materials, the method implementing a device for charging a mixture of granules of different materials, the device comprising:
- a charging chamber comprising walls delimiting an inner space, the walls defining a granule inlet and a granule outlet, the granule inlet and the granule outlet being separated from one another relative to an elevation direction,
- a blowing device suitable for generating, in the inner space, an air flow flowing in the elevation direction, the air flow being suitable for allowing the granules in the chamber to form a fluidized bed, and
- a plurality of grids positioned in the chamber, the grids being suitable for blocking the passage of the granules, the grids forming a set of baffles in the inner space between the granule inlet and the granule outlet,
- the method comprising the following steps:
- generating the air flow in the inner space via the blowing device,
- inserting granules in the chamber through the granule inlet,
- having the granules travel through the chamber, in order to obtain charged granules, and
- extracting the charged granules from the chamber through the granule outlet.
A method for separating granules of a mixture of granules of different materials, the method comprising charging the granules by using a device for triboelectric charging,
- the device comprising:
- a charging chamber comprising walls delimiting an inner space, the walls defining a granule inlet and a granule outlet, the granule inlet and the granule outlet being separated from one another relative to an elevation direction,
- a blowing device suitable for generating, in the inner space, an air flow flowing in the elevation direction, the air flow being suitable for allowing the granules in the chamber to form a fluidized bed, and
- a plurality of grids positioned in the chamber, the grids being suitable for blocking the passage of the granules, the grids forming a set of baffles in the inner space between the granule inlet and the granule outlet,
- the materials of the granules being chosen from the group consisting of polypropylene, polystyrene, polyamide, acrylonitrile butadiene styrene and polyethylene.
Dependencies are inferred from the claim text.