US3742680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating particulate matter from a gaseous suspension
Assignee: SCIENT EDUCATIONAL SERV Inc
•
Filing: 1971-04-19
•
Granted: 1973-07-03
•
Expires: 1991-04-19
Abstract
Abstract Apparatus is described for separating electrically charged solid or liquid particulate matter from a gas stream in which such particulate matter is suspended, including an electrically insulated flue through which the suspension is passed, a perforate wall in this flue and a collecting electrode located outside the flue opposite and spaced from the perforate wall. Such arrangement provides maximum field intensity at the point of perforation and accelerates the particulate matter through the perforation to the collecting electrode where it is discharged. Means are also described for charging the particulate matter by turbulent flow of the gaseous suspension; for controlling the flow of gas through the perforate wall by adjusting the size of the perforations and the pressure differential across the perforate wall; for containing the separated and discharged particles by enclosing the perforate wall and the collecting electrode; and for removing the particles from this enclosure. Such apparatus can be used to effect essentially complete separation of the gaseous and particulate components of a suspension, to concentrate particulate matter in a portion of the gas stream in which it is suspended or to transfer particulate matter suspended in a gas stream to a second gas stream.
Inventors
- 👤 R Severs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/28; B03C3/30; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
Apparatus for separating particulate matter from a stream of a gaseous suspension of said particulate matter comprising a. an elongated dielectric gas flue having an inlet at one end, an outlet at the other end and a wall section intermediate said ends, said wall section containing at least one perforation, b. frictional electrostatic charging means communicating with the inlet of said gas flue and c. a metal collecting electrode located outside said flue opposite and spaced from said perforation, each metal electrode in said apparatus being electrically grounded.
Claim 2
Dependent Claim
88 words
Apparatus for separating particulate matter from a stream of a gaseous suspension of said particulate matter comprising a. an elongated dielectric gas flue having an inlet at one end, an outlet at the other end and a wall section intermediate said ends, said wall section containing at least one perforation, b. frictional electrostatic charging means communicating with the inlet of said gas flue and c. a metal collecting electrode located outside said flue opposite and spaced from said perforation, each metal electrode in said apparatus being electrically grounded.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 wherein said flue is composed of a poly(fluoroolefin).
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein said electrostatic charging means is a, solid wall poly(fluoroolefin) extention of said flue at its inlet end.
Claim 5
Dependent Claim
18 words
The apparatus of claim 1 wherein said collecting electrode is a metal sleeve axially disposed around said flue.
Claim 6
Dependent Claim
19 words
The apparatus of claim 4 having closure means substantially enclosing the space between said gas flue and said sleeve.
Claim 7
Dependent Claim
12 words
The apparatus of claim 1 wherein said gas flue contains multiple perforations.
Claim 8
Dependent Claim
23 words
The apparatus of claim 1 wherein said total perforation area is less than about 10 percent of the surface area of said flue.
Claim 9
Dependent Claim
14 words
The apparatus of claim 1 wherein said gas flue contains a single helical perforation.
Claim 10
Dependent Claim
157 words
Apparatus for separating suspended particulate matter from a stream of a gaseous suspension of said particulate matter comprising a. a poly(fluoroethylene) tube having a melting point of at least about 500* F, said tube having a solid wall frictional charging section at its inlet end, a solid wall exhaust section at its outlet end and a perforate wall section intermediate said solid wall sections, said perforate wall section having a single helical perforation and said total perforation area being less than about 10 percent the surface area of said perforate wall section b. an electrically grounded metal sleeve collecting electrode disposed around and spaced from said perforate wall section, said sleeve being the only metal electrode in said apparatus, c. closure discs extending outward from said tube to each end of said sleeve and substantially enclosing the space between said perforate wall section and said sleeve and d. means for removing precipitated particulate matter from said space.
Claim 11
Dependent Claim
157 words
Apparatus for separating suspended particulate matter from a stream of a gaseous suspension of said particulate matter comprising a. a poly(fluoroethylene) tube having a melting point of at least about 500* F, said tube having a solid wall frictional charging section at its inlet end, a solid wall exhaust section at its outlet end and a perforate wall section intermediate said solid wall sections, said perforate wall section having a single helical perforation and said total perforation area being less than about 10 percent the surface area of said perforate wall section b. an electrically grounded metal sleeve collecting electrode disposed around and spaced from said perforate wall section, said sleeve being the only metal electrode in said apparatus, c. closure discs extending outward from said tube to each end of said sleeve and substantially enclosing the space between said perforate wall section and said sleeve and d. means for removing precipitated particulate matter from said space.
References Cited (Backward Citations)
US1357886A
Cited
US2114682A
Cited
US2275001A
Cited
AT168565B
Cited
GB716868A
Cited
GB792068A
Cited
US3247091A
Cited
US3157479A
Cited
US3309915A
Cited
US3344062A
Cited
US3307332A
Cited
US3478494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |