Patent US4622864A successfully refreshed from Google Patents.
Patent US5743926A successfully refreshed from Google Patents.
US5743926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separation of liquid and vapor in distillation/flashing process
Assignee: Shell USA Inc
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Filing: 1996-08-01
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Granted: 1998-04-28
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Expires: 2016-08-01
Abstract
Abstract A portion of the feed line to a distilling column/flasher (or the like apparatus) is used as a flow-through cyclone to separate vapor and liquid components of the feed. Vortex flow is induced in the flasher feed line with a swirl vane assembly having drainage slots in the bottommost portion thereof for preventing entrapment of liquids therein. A shave-off device at the discharge end of the flasher feed line minimizes re-entrainment. The shave-off device includes a short cylinder, slightly smaller in diameter than the feed line and arranged coaxially therewith to form an annulus, which leads to a circular liquid collection chamber and collection chute draining into the flasher unit. Covers are removable for cleaning. The purpose of the shave-off device is to remove the liquids from the wall of the transfer (flasher feed) line in such a way that re-entrainment of liquids is minimized. The non-intrusive nature of the shave-off device minimizes vapor phase pressure drop.
Inventors
- 👤 Robert Patrick Bannon, deceased
- 👤 Louis Edward Stein
- 👤 William David Kief
- 👤 Krishna Rangraj Kaushik
- 👤 Pui-Yuen Jeffrey Chan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:07
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
153 words
A liquid/vapor separator for separating entrained liquid from vapor comprising: a transfer tube having an input end for receiving a feed, said feed comprising a liquid entrained in a vapor, and an output end fluidly connected to the input of a vessel for delivering said feed to said vessel; helical vane means located within said transfer tube for imparting centrifugal force to said feed whereby said heavier fluid components of said feed are forced to the inner wall of said transfer tube thereby separating the liquid and vapor components of said feed and wherein said helical vane means includes drainage slots in the bottommost portions thereof for preventing entrapment of liquid within said transfer tube; means for collecting said separated liquid components of said feed; means for directing said collected liquid components of said feed to said vessel; and separate means for directing said vapor component to a different portion of said vessel.
Claim 2
Dependent Claim
153 words
A liquid/vapor separator for separating entrained liquid from vapor comprising: a transfer tube having an input end for receiving a feed, said feed comprising a liquid entrained in a vapor, and an output end fluidly connected to the input of a vessel for delivering said feed to said vessel; helical vane means located within said transfer tube for imparting centrifugal force to said feed whereby said heavier fluid components of said feed are forced to the inner wall of said transfer tube thereby separating the liquid and vapor components of said feed and wherein said helical vane means includes drainage slots in the bottommost portions thereof for preventing entrapment of liquid within said transfer tube; means for collecting said separated liquid components of said feed; means for directing said collected liquid components of said feed to said vessel; and separate means for directing said vapor component to a different portion of said vessel.
Claim 3
Dependent Claim
19 words
The separator of claim 1 wherein said helical vane means completes a 360° rotational angle within said transfer tube.
Claim 4
Dependent Claim
17 words
The separator of claim 2 wherein said helical vane means is fixedly attached inside said transfer tube.
Claim 5
Dependent Claim
36 words
The separator of claim 3 wherein said helical vane means is axially supported in said transfer tube on the edges of said vanes by stand-off means adapted for rigid connection to the edges of said vanes.
Claim 6
Dependent Claim
22 words
The separator of claim 3 wherein the edges of said vanes of said helical vane means are welded to said transfer tube.
Claim 7
Dependent Claim
15 words
The separator of claim 2 wherein said helical vane means is supported by a hub.
Claim 8
Dependent Claim
21 words
The separator of claim 6 wherein said hub diameter is a large portion of the diameter of said helical vane means.
Claim 9
Dependent Claim
29 words
The separator of claim 1 wherein said means for collecting said separated liquid components of said feed is an annulus formed at the output end of said transfer tube.
Claim 10
Dependent Claim
23 words
The separator of claim 8 wherein said annulus is formed by a concentric tube fixedly attached inside said transfer tube and separated therefrom.
Claim 11
Dependent Claim
23 words
The separator of claim 8 wherein said annulus is in fluid communication with said means for directing said liquid components to said vessel.
Claim 12
Dependent Claim
26 words
The separator of claim 10 wherein said means for directing further includes liquid chute means for directing said liquid components to the bottom of said vessel.
Claim 13
Dependent Claim
15 words
The separator of claim 4 wherein said drainage slots are incorporated in said stand-off means.
Claim 14
Dependent Claim
23 words
The separator of claim 1 wherein said helical vane means has a pitch lying in the range between about 20° and about 30°.
References Cited (Backward Citations)
DE140003C
Cited
US1708653A
Cited
US1930476A
Cited
US1471088A
Cited
US1686066A
Cited
US1950285A
Cited
US1994110A
Cited
US2186344A
Cited
US2323707A
Cited
US2489903A
Cited
US2709504A
Cited
US2726198A
Cited
US2897147A
Cited
US3538684A
Cited
US3603062A
Cited
US3885935A
Cited
US3885934A
Cited
US3884660A
Cited
US4140212A
Cited
US4324573A
Cited
US4622103A
Cited
SU1487930A1
Cited
GB2239193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-27 | 2001-10-27 | 2002-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-27 | 2005-10-27 | 2006-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-27 | 2009-10-27 | 2010-04-28 | $7700.00 | Window Closed / Lapsed |