Pneumatic dosimeter

Details Pneumatic dosimeter Pneumatic dosimeter

1988-10-11

1990-06-05

Huppert, Michael S.

Dispensing

Fluid flow discharge

222135, 222195, 406 89, 406119, B65G 6906, B05B 700

Patent

active

049306910

ABSTRACT:
A pneumatic dosimeter for providing exact dosage of pulverulent materials, for instance for supplying aluminium oxide and fluoride to an aluminium electrolytic cell, comprises a vessel (1) with an upper chamber (2) which at the bottom is provided with a fluidizing device in the form of a fluidizing canvas (3) with an underlying chamber which is connected to an air source via a pipe line (5). The vessel is provided with an inlet (6) for the supply of pulverulent material from a supply tank or hopper (7) to the upper chamber (2), and an outlet opening for discharging the chamber (2). At least one fluidizing channel or pipe (9) is provided between the supply tank (7) and the vessel (1). This channel is provided with a fluidizing wall or fluidizing canvas (10) which is connected to an air supply source through a pipe line (12). The filling and emptying of the chamber (2) is carried out by solenoid valves (13,14) which are provided in the pipe line (5 ) connected to the vessel (1) and the pipe line (12) connected to the channel (9), respectively. The solenoid valves are controlled by a PLS governor or a processor such that air is supplied to the channel (9) and the vessel (1) according to a preferred time and frequency program.

REFERENCES:
patent: 3188144 (1965-06-01), Gmur et al.
patent: 3995771 (1976-12-01), Olivier
patent: 4417832 (1983-11-01), Krauss
patent: 4692068 (1987-09-01), Harnotj et al.

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