Liquid purification or separation – Sectional chamber press type – With residue removal or liquid agitation
Patent
1979-10-17
1981-06-23
Granger, Theodore A.
Liquid purification or separation
Sectional chamber press type
With residue removal or liquid agitation
100115, 210387, B01D 2532
Patent
active
042749611
ABSTRACT:
An automated plate and frame type of pressure filter comprises a plurality of vertically superimposed horizontal shells, each vertically adjacent pair of which having a horizontal filter media belt sandwiched therebetween. All shells but the bottom shell are movable vertically by a pair of lift cylinders to separate opposed pairs and allow the filter belts to be indexed horizontally for cleaning. On completion of the belt cleaning cycle, the shells are pressed together by the double-acting lift cylinders which temporarily over-compress seals on the edges of the shells, allowing a structurally reinforced mechanical locking system to engage which opposes and resists the substantial shell-separating forces generated by the subsequently applied filtration pressure. The top shell receives contaminated liquid under pressure, which liquid is forced downwardly through a filter belt into the upper chamber of the next adjacent shell, from which clarified filtrate is withdrawn, the contaminating particles remaining behind as a filter cake on the upper surface of the filter belt. Each intermediate shell also has a lower chamber which is sealed from the upper chamber of such shell and which, like the top shell, receives pressurized contaminated liquid and cooperates with the upper chamber of the next lower shell and the interposed filter belt to filter out the contaminants. Upon accumulation of excessive filter cake, as measured by a pressure switch, the supply of contaminated liquid is shut off, the locking mechanism released and the shells separated to allow indexing and cleaning of the filters. Each filter belt traverses horizontally from a supply roll to a discharge roll for cleaning, and then is rewound onto the supply roll to start the next filtration cycle. All supply and discharge rolls are simultaneously frictionally power-driven from a single endless loop cable which is winch-driven and winds around pulleys coaxial with each roll. The cable is slack when the shells are locked together for filtration, because the vertical spacing between the rolls, which are secured to the vertically movable shells, is then reduced. However, the cable becomes taut and capable of frictionally driving the rolls when the shells and their associated rolls are vertically separated for belt indexing and cleaning.
REFERENCES:
patent: 1331350 (1920-02-01), Miller
patent: 1749080 (1930-03-01), Mothers
patent: 3342123 (1967-09-01), Ermatkov et al.
patent: 3437210 (1969-04-01), O'Neil
patent: 3648841 (1972-03-01), Schotten et al.
patent: 3731808 (1973-05-01), Rictert
patent: 3750563 (1973-08-01), Tinjum
patent: 3807567 (1974-04-01), Iwatani
patent: 3814688 (1974-06-01), Hirs
patent: 3899426 (1975-08-01), Hirs
patent: 3968039 (1976-07-01), Inajima
patent: 4070288 (1978-01-01), Gertis
LandOfFree
Pressure filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2206993