US3669267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter press plate process and apparatus
Assignee: T Shriver and Co Inc
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Filing: 1970-07-07
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Granted: 1972-06-13
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Expires: 1990-07-07
Abstract
Abstract Process and apparatus for chamber-type filter presses formed with a plurality of filter plates, each having a peripheral frame and an integral partition plate dividing the frame into filter cake receiving recesses with filter cloths within the recesses and pressed into grooves on the interior periphery of the filter plate by caulking strips to retain the cloths against the surface of the plates; the plates have a first inlet port extending through the frame on one edge thereof radially outwardly of the filter cloth for communication with a corresponding inlet in adjacent filter plates, a second inlet port extending through the frame on a side thereof opposite the first inlet port for communicating with a corresponding inlet in the adjacent filter plates, both of the inlets communicate, outwardly of the filter cloths, with the recesses formed in the filter plates, and at least one outlet port on each side of the partition plate for discharging fluid flowing through the filter cloths from the filter plate. The filter press is utilized in a process for filtering fluid containing solid substances suspended therein which is initially supplied under pressure to the lower of the inlet ports and flows along the surfaces of the filter cloths towards the upper of the inlet ports whereby the fluid is recirculated and distributed through the upper ports until the press is filled with fluid, and thereafter the fluid to be filtered is supplied to both the lower and upper ports to maintain an even distribution of pressure in the press while filtered effluent is continuously drained therefrom.
Inventors
- 👤 William L Hutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:21
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D25/00; B01D25/12; B01D25/176; B01D25/21; B01D25/215
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
In a process for filtering liquids having solid substances suspended therein and a filter press having filter plates formed with vertically spaced upper and lower influent ports, providing intercommunication between each of the filter chambers between said plates, the steps of, supplying liquid to be filtered to one of said ports, flowing said liquid along the surfaces of said filter plates towards the other of said ports, recirculating and distributing said liquid through said other port, until said press is filled with liquid, thereby maintaining a substantially even pressure distribution in said press and against said plates, thereafter supplying liquid to be filled into both of said ports, and continuously draining effluent from said press.
Claim 2
Dependent Claim
15 words
A process as described in claim 2 including the step of precoating said filter plates.
Claim 3
Dependent Claim
68 words
A process as defined in claim 3 wherein said precoating step includes the steps of initially circulating a slurry of precoat material through said ports in said filter plates and along the surfaces of said plates until said press is filled with said slurry, thereafter supplying said slurry through one of said ports and continuously draining filtrate from said plates thereby applying said precoat material to said filters.
Claim 4
Dependent Claim
63 words
A process as described in claim 4 wherein said step of supplying liquid to be filtered to one of said ports includes the steps of concurrently decreasing the supply of precoat slurry to said port and increasing the supply of liquid to said port until a full flow of liquid is supplied to said port whereby the pressure within said press is maintained.
Claim 5
Dependent Claim
32 words
A process as described in claim 2 wherein said step of supplying liquid to be filtered to one of said ports comprises supplying said liquid to the lower of said influent ports.
Claim 6
Dependent Claim
264 words
A filter plate for use in a filter press adapted to filter liquids having solid substances suspended therein comprising, a peripheral frame having a partition plate defining a pair of opposed drainage areas and dividing said frame into filter cake receiving recesses on opposite sides thereof, said frame having first peripheral grooves adjacent the periphery of said recesses and opening outwardly thereof, filter cloths overlying said drainage areas, means for securing the periphery of said cloths in said grooves, a first inlet port extending through said frame on one edge thereof radially outwardly of said grooves for communication with a corresponding inlet in an adjacent filter plate and communicating with both of said recesses outwardly of said filter cloths, a second inlet port extending through said frame on a side thereof opposite said one side and located radially outwardly of said grooves for communicating with a corresponding inlet in an adjacent filter plate and communicating with both of said recesses outwardly of said filter cloths whereby influent introduced into one of said inlet ports is permitted to flow along the surface of said cloths to the other of said inlet ports to provide an even distribution and circulation of influent between adjacent plates, an outlet passage adapted to communicate with corresponding outlet passages on adjacent filter plates, and at least one outlet conduit connecting said outlet passage to each side of said partition plate and in fluid communication with said recess at said drainage areas between said partition plate and said filter cloths for discharging liquid flowing through said filter cloths from said plates.
Claim 7
Dependent Claim
65 words
A filter plate as defined in claim 7 wherein said frame has a second peripheral groove on one side thereof, located radially outwardly of said first peripheral grooves and opening outwardly of said frame, and gasket means fixed in said second peripheral groove adapted to engage the peripheral frame of an adjacent filter plate to form a seal between said plates to retain liquid therebetween.
Claim 8
Dependent Claim
60 words
A filter plate as defined in claim 7 wherein said frame has feed channels formed therein for communicating said first and second ports with said recesses, said channels having a base portion lying in substantially the same plane as said filter cloths to provide an unobstructed flow path for liquid between said ports and the surface of said filter cloths.
Claim 9
Dependent Claim
21 words
A filter plate as defined in claim 8 including a pair of outlet passages located on each of said plate edges.
Claim 10
Dependent Claim
162 words
A filter plate for use in a filter press adapted to filter liquids having solid substances suspended therein comprising, a peripheral frame having a partition plate defining a pair of opposed drainage areas and dividing said frame into filter cake receiving recesses on opposite sides thereof, filter cloths overlying said drainage areas, a first inlet port extending through said frame adjacent the periphery of said recesses in liquid communication with corresponding inlets in adjacent filter plates and with said recesses outwardly of said filter cloths, a second inlet port extending through said frame on a side thereof opposite said first inlet port adjacent the periphery of said recesses in liquid communication with corresponding inlets in adjacent filter plates and with said recesses outwardly of said filter cloths whereby liquids introduced into one of said inlet ports flows along the surface of said cloths to the other of said inlet ports to provide an even distribution and circulation of influent between adjacent plates.
Claim 11
Dependent Claim
81 words
A filter plate as described in claim 10 including at least one outlet passage in said filter plate adapted to be positioned in liquid communication with similar outlet passages in adjacent filter plates, and a pair of outlet conduits associated with said passages opening at one end to their associated passage and at their opposed ends to respective sides of said partition plate whereby liquid flowing through said filter clothS and along said drainage areas is discharged from said filter plates.
Claim 12
Dependent Claim
47 words
A filter plate as defined in claim 11 wherein said frame has opposed grooves formed adjacent the periphery of said recesses and opening outwardly thereof and caulking strips engaging the periphery of said filter cloths and pressed into said grooves to secure said cloths in said grooves.
Claim 13
Dependent Claim
142 words
A filter plate for use in a filter press adapted to filter liquids having solid substances suspended therein comprising, a peripheral frame having a partition plate defining a drainage area and a filter cake receiving recess on at least one side thereof, a filter cloth overlying said drainage area, a first inlet port extending through said frame adjacent the periphery of said recess in liquid communication with said recess outwardly of said filter cloth, a second inlet port extending through said frame on a side thereof opposite said first inlet port adjacent the periphery of said recess and in liquid communication therewith outwardly of said filter cloths whereby liquid introduced into one of said inlet ports flows along the surface of said cloth to the other of said inlet ports to provide an even distribution and circulation of influent between adjacent plates.
Claim 14
Dependent Claim
220 words
A filter press adapted to filter liquids having solid substances suspended therein comprising, a frame, a fixed head plate mounted on said frame, a movable head plate slidably mounted on said frame, actuator means for moving said movable head plate with respect to said fixed head, and a plurality of filter plates movably mounted on said frame between said fixed and movable head plates and held in relatively fixed positions by said actuator means, said plates including a peripheral frame having a partition plate defining a pair of opposed drainage areas and dividing said frame into filter cake receiving recesses on opposite sides thereof, filter cloths overlying said drainage areas, a first inlet port extending through said frame adjacent the periphery of said recesses in liquid communication with corresponding inlets in adjacent filter plates and with said recesses outwardly of said filter cloths, a second inlet port extending through said frame on a side thereof opposite said first inlet port adjacent the periphery of said recesses in liquid communication with corresponding inlets in adjacent filter plates and with said recesses outwardly of said filter cloths whereby liquids introduced into one of said inlet ports flows along the surface of said cloths to the other of said inlet ports to provide an even distribution and circulation of influent between adjacent plates.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |