Back to results
US 6,622,870 B1Granted
Vacuum belt filter apparatus enclosed in a pressurized chamber and related method of filtration
AssigneePannevis B.V.
InventorAlphons Arnoldus Johannes Antonius Prinssen
Life of this patent
Estimating the term…
Abstract
A filtering device for separating liquid and solid material from a mixture consists of an endless filter belt. Filtrate is separated off by means of the pressure difference above and below the filter belt. The device is placed in a high pressure space in order to keep liquid substances which at ambient temperature and atmospheric pressure would become gaseous. The applied pressures can rise to roughly 20 bar.
Claims12
A filtering device for separating liquid and solid materials from a mixture, comprising:
- a pressure chamber containing an endless filter belt and a suction box;
- means for supplying a mixture of liquid and solid materials at higher than atmospheric pressure into said pressure chamber to an upper side of said filter belt;
- means for connecting said suction box onto an underside of said filter belt;
- at least a drive for said filter belt is located outside of said pressure chamber;
- and
- means for maintaining a higher than atmospheric pressure in said pressure chamber and a relatively small difference between the pressure in said pressure chamber and the pressure in said suction box.
3 more elements
A Filtering device for separating liquid and solid materials from a mixture, comprising:
- a pressure chamber containing an endless filter belt and a suction box;
- means for supplying a mixture of liquid and solid material to a first side of said filter belt;
- means for connecting said suction box to an underside of said filter belt;
- at least a drive for said filter belt is located outside of said pressure chamber;
- and
- means for maintaining a higher than atmospheric pressure in said pressure chamber of about 20 bar and a relatively small difference of about 1-2 bar between the pressure in said pressure chamber and the pressure in said suction box when said suction box is connected to an underside of said filter belt.
3 more elements
Dependencies are inferred from the claim text.