US4058379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Phillips Petroleum Co
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Filing: 1975-05-27
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Granted: 1977-11-15
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Expires: 1995-05-27
Abstract
Abstract A method and apparatus for filtering solids from a gas stream is disclosed wherein the flow of the gas stream through a filter medium is stopped after a filter cake has built up consisting of the solid particles having been filtered out of the gas stream, wherein a plurality of cleaning gas streams is generated that sweep and remove the filter cake built upon the filter medium. The cleaning gas streams are emitted from pipes which also function to support the filter medium.
Inventors
- 👤 Paul J. Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:28
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D46/71; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
341 words
A filter system for filtering a solids-containing gas stream, comprising a. a filter housing, b. wall means so disposed within said filter housing as to form a gas inlet portion and a clean gas outlet portion, said wall means having at least one opening therein between said gas inlet portion and said clean gas outlet portion, with said opening being adapted to receive the open first end of an elongated cylindrical filter bag; c. first conduit means to introduce said solids-containing gas into said gas inlet portion; d. second conduit means to remove a solids-free gas from said clean gas outlet portion; e. said elongated cylindrical filter bag disposed in said clean gas outlet portion in association with said opening in said wall means, said elongated cylindrical filter bag having said open first end in a fluid-tight relationship with said opening and a closed second end; f. third conduit means disposed within said elongated cylindrical filter bag and having the axis thereof parallel to the axis of said elongated cylindrical filter bag; g. a plurality of ring-shaped pipe means in fluid communication with said third conduit means, each of said ring-shaped pipe means having at least one opening therein and being so adapted as to direct a flow of cleaning gas so as to sweep along the inner surface of said elongated cylindrical filter bag, and wherein the external ring diameter of said ring-shaped pipe means is essentially the same as the internal diameter of said elongated cylindrical filter bag so that said ring-shaped pipe means, in addition to providing a means for directing said flow of cleaning gas along the inner surface of said elongated cylindrical filter bag, also supports said elongated cylindrical filter bag; h. fourth conduit means in communication with said third conduit means and a source of said cleaning gas; and i. valve means in said fourth conduit means to regulate flow of said cleaning gas from said source of said cleaning gas through said third and fourth conduits and each of said plurality of ring-shaped pipes.
Claim 2
Dependent Claim
341 words
A filter system for filtering a solids-containing gas stream, comprising a. a filter housing, b. wall means so disposed within said filter housing as to form a gas inlet portion and a clean gas outlet portion, said wall means having at least one opening therein between said gas inlet portion and said clean gas outlet portion, with said opening being adapted to receive the open first end of an elongated cylindrical filter bag; c. first conduit means to introduce said solids-containing gas into said gas inlet portion; d. second conduit means to remove a solids-free gas from said clean gas outlet portion; e. said elongated cylindrical filter bag disposed in said clean gas outlet portion in association with said opening in said wall means, said elongated cylindrical filter bag having said open first end in a fluid-tight relationship with said opening and a closed second end; f. third conduit means disposed within said elongated cylindrical filter bag and having the axis thereof parallel to the axis of said elongated cylindrical filter bag; g. a plurality of ring-shaped pipe means in fluid communication with said third conduit means, each of said ring-shaped pipe means having at least one opening therein and being so adapted as to direct a flow of cleaning gas so as to sweep along the inner surface of said elongated cylindrical filter bag, and wherein the external ring diameter of said ring-shaped pipe means is essentially the same as the internal diameter of said elongated cylindrical filter bag so that said ring-shaped pipe means, in addition to providing a means for directing said flow of cleaning gas along the inner surface of said elongated cylindrical filter bag, also supports said elongated cylindrical filter bag; h. fourth conduit means in communication with said third conduit means and a source of said cleaning gas; and i. valve means in said fourth conduit means to regulate flow of said cleaning gas from said source of said cleaning gas through said third and fourth conduits and each of said plurality of ring-shaped pipes.
Claim 3
Dependent Claim
71 words
A filter system according to claim 1 wherein there are a plurality of openings in said wall means and a plurality of elongated cylindrical filter bags disposed in said clean gas outlet portion of said filter housing and a plurality of third conduit means, one each of which being disposed in each of said elongated cylindrical filter bags and each of which is in fluid communication with said fourth conduit means.
Claim 4
Dependent Claim
26 words
A filter system according to claim 2 wherein said opening in each of said ring-shaped pipe means is in the form of a continuous ring-shaped opening.
Claim 5
Dependent Claim
42 words
A filter system according to claim 1 wherein each of said ring-shaped pipe means is connected to and in fluid communication with a radial pipe extending radially inwardly toward the center of the respective ring-shaped pipe means and said third conduit means.
Claim 6
Dependent Claim
20 words
A filter system according to claim 1 wherein each of said ring-shaped pipe means has a plurality of openings therein.
Claim 7
Dependent Claim
20 words
A filter system according to claim 5 wherein said openings are arranged equidistant on each of said ring-shaped pipe means.
Claim 8
Dependent Claim
20 words
A filter system according to claim 1 wherein said elongated cylindrical filter bag consists essentially of a glass fiber material.
References Cited (Backward Citations)
US1321490A
Cited
US1329115A
Cited
US1498061A
Cited
US1944268A
Cited
US2796146A
Cited
US2889048A
Cited
US2788860A
Cited
US3053030A
Cited
US3178868A
Cited
US3146080A
Cited
US3095289A
Cited
US3176449A
Cited
US3256679A
Cited
US3268296A
Cited
US3325979A
Cited
US3471024A
Cited
US3339347A
Cited
US3429107A
Cited
US3473300A
Cited
US3543481A
Cited
US3521428A
Cited
US3520109A
Cited
US3716968A
Cited
US3623910A
Cited
US3685257A
Cited
US3816977A
Cited
US3853506A
Cited
US3816979A
Cited
US3838555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |