Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Solid component
Reexamination Certificate
2006-04-25
2006-04-25
Johnson, Edward M. (Department: 1754)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Solid component
C422S216000
Reexamination Certificate
active
07033556
ABSTRACT:
There is provided a granular-bed filter for cleaning a gas containing fine particulate matter (“dust”). A multiplicity of vertically disposed filter trays are assembled to form a “panel.” In each filter tray, an inclined porous plate supports a bed of granular material. Each bed presents an inclined gas-entry face that receives gas from a vertically-disposed dusty-gas-distribution compartment nearby the face's lower edge. A filter cake forms upon the gas-entry face. Preferably, the bed's depth is substantially the same at its upper and lower edges. Cleaned gas leaves a tray across the porous plate and flows into a vertically-disposed cleaned-gas-collection compartment. After an interval of filtration, gas-entry faces are renewed by producing en masse displacement of the material respecting the supporting plates, the displacement producing a spill of a surface layer from each gas-entry face. The displacement is preferably accomplished by causing the support plates to move sharply upward (e.g., as may be caused by an upward blow of a hammer). The displacement may also be caused by subjecting the panel to a reverse transient surge flow of gas (i.e., a “puff-back”). After face renewal, granular material descends by gravity from an elevated source to make good loss of the material from the faces.
REFERENCES:
patent: 3296775 (1967-01-01), Squires
patent: 3800508 (1974-04-01), Zenz
patent: 3926587 (1975-12-01), Squires
patent: 3926593 (1975-12-01), Squires et al.
patent: 3928532 (1975-12-01), Squires
patent: 3957953 (1976-05-01), Squires
patent: 3987148 (1976-10-01), Squires
patent: 4004350 (1977-01-01), Squires
patent: 4004897 (1977-01-01), Squires
patent: 4006533 (1977-02-01), Squires
patent: 4017278 (1977-04-01), Reese
patent: 4308036 (1981-12-01), Zahedi et al.
patent: 4349367 (1982-09-01), Krumwiede
patent: 4354862 (1982-10-01), Sgaslik
patent: 4360364 (1982-11-01), Kohl
patent: 4548623 (1985-10-01), Naske
patent: 4880608 (1989-11-01), Stelman
patent: 5165900 (1992-11-01), Miksitz
patent: 5527514 (1996-06-01), Watanabe et al.
patent: 6783572 (2004-08-01), Squires
Lee et al.;The Panel Bed Filter, Final Report to Electric Power Research Institute (EPRI); Report # AF-560; May 1977.
Rodon et al.;Panel Bed Filtration Data for Three Dusts at 150° C.; Paper 79-56.5 presented at meeting of Air Pollution Control Ass'n; Cincinnati, OH; Jun. 1979; 16 pages.
Squires et al;The Panel Bed; A Fluid-Solid Contacting Device Exploiting a New Mode of Soil Failure; Paper presented at POWTECH 81; Birmingham, England, Mar. 1981: 16 pages.
Risnes et al.;Evaluation of a novel granular bed filtration system for high temperature applications; Paper presented at Conference “Progress in Thermochemical Biomass Conversion”, Tyrol, Austria: 2000; 12 pages.
Creighton Wray James
Johnson Edward M.
Narasimhan Meera P.
LandOfFree
Method and apparatus for cake-forming granular-bed filtration does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for cake-forming granular-bed filtration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for cake-forming granular-bed filtration will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3593671