Powder recovery method and device

Details Powder recovery method and device Powder recovery method and device

1986-08-20

1989-01-10

Peters, Jr., Joseph F.

Conveyors: fluid current

Intake to fluid current conveyor

Load receptacle type

406173, 406109, B65G 5338

Patent

active

047970383

ABSTRACT:
A method of recovering powder, for example in a powder-coating installation, uses processing plant adapted to operate at a pressure different to atmospheric pressure. Powder accumulating in a receptacle communicating with the processing plant is fluidized and a pressure head of fluidized powder is created to compensate the pressure difference imposed by the processing plant. A corresponding powder recovery device comprises processing plant adapted to operate at a pressure different to atmospheric pressure, a receptacle for the powder, a substantially vertical column through which this receptacle communicates with the processing plant, and structure for fluidizing at least the powder in this column. The processing plant may comprise a cyclone type separator, in which case the column is a pipe extending the cyclone downwardly. Alternatively, the processing plant may comprise a box having an air inlet and an air outlet and filters between the air inlet and the air outlet. In this case the column comprises a pipe coupled to the bottom of a hopper situated beneath the filters.

REFERENCES:
patent: 2972501 (1961-02-01), Feinman
patent: 3489464 (1970-01-01), Delfs
patent: 3698874 (1972-10-01), Zenz
patent: 4245551 (1981-01-01), Berkmann
patent: 4530290 (1985-07-01), Comparato
patent: 4593630 (1986-06-01), Teigen

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