Patent US4101288A successfully refreshed from Google Patents.
Patent US4486207A successfully refreshed from Google Patents.
US4486207A
Expired / Lapsed
US
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Apparatus for reducing attrition of particulate matter in a chemical conversion process
Assignee: Atlantic Richfield Co
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Filing: 1982-12-20
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Granted: 1984-12-04
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Expires: 2002-12-20
Abstract
Abstract An apparatus for separating solid particles from vapor is disclosed. The apparatus includes a novel inlet system, a novel particle outlet system and a chamber having novel dimensional relationships which result in an apparatus that separates solid particles from vapor with less attrition, or "break-up" of particulate matter, while maintaining a high separation efficiency at high loading conditions, e.g., the apparatus maintains a tangential wall velocity of less than about 50 feet per second and separates, from a mixture of solid particles and vapor, more than about 95% of the solid particles that are larger than about 20 microns in diameter while processing more than about 200 cubic feet of the mixture per second. This apparatus is particularly suited to at least partially seperating solid particles from a mixture of vapors and solid particles, the mixture being of the type which arises when restoring the catalytic activity of solid particles previously used to promote or carry out a chemical conversion such as hydrocarbon cracking.
Inventors
- 👤 Lloyd A. Baillie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:17
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/081; B01; B01D; B01D45/00; B01D45/12; B01J; B01J8/00; B01J8/005; B01J8/0055; B04C5/02; B04C5/04; B04C5/14; B04C5/181; B04C9/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
222 words
In an apparatus for separating solid particles from a first fluid stream which includes a mixture of vapor and said particles, said apparatus including a body that defines a chamber defined by an interior cylindrical surface, inlet means for introducing said first fluid stream mixture into said chamber, fluid outlet means for withdrawing a second fluid stream substantially free of said particles from said chamber, and particle outlet means for withdrawing at least a portion of said particles that has been separated from said mixture in said chamber, the improvement comprising: said inlet means comprising a plurality of inlet passageway means wherein each said inlet passageway means is a means for conducting an inlet stream associated therewith along a substantially straight path tangentially into said chamber to induce said particles contained therein to move toward said interior cylindrical surface, said plurality of inlet passageway means is situated such that said path of one inlet stream will impinge upon the path of a downstream inlet stream associated with a downstream inlet passageway means to induce said particles contained in the impinging stream to be deflected away from said cylindrical surface; whereby said mixture is introduced into said chamber at a high velocity while reducing contact of said solid particles with said cylindrical surface so as to maintain separation efficiency while decreasing particle attrition.
Claim 2
Dependent Claim
222 words
In an apparatus for separating solid particles from a first fluid stream which includes a mixture of vapor and said particles, said apparatus including a body that defines a chamber defined by an interior cylindrical surface, inlet means for introducing said first fluid stream mixture into said chamber, fluid outlet means for withdrawing a second fluid stream substantially free of said particles from said chamber, and particle outlet means for withdrawing at least a portion of said particles that has been separated from said mixture in said chamber, the improvement comprising: said inlet means comprising a plurality of inlet passageway means wherein each said inlet passageway means is a means for conducting an inlet stream associated therewith along a substantially straight path tangentially into said chamber to induce said particles contained therein to move toward said interior cylindrical surface, said plurality of inlet passageway means is situated such that said path of one inlet stream will impinge upon the path of a downstream inlet stream associated with a downstream inlet passageway means to induce said particles contained in the impinging stream to be deflected away from said cylindrical surface; whereby said mixture is introduced into said chamber at a high velocity while reducing contact of said solid particles with said cylindrical surface so as to maintain separation efficiency while decreasing particle attrition.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 wherein the plurality of passageway means comprises at least three passageway means.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1 wherein the plurality of passageway means comprises at least four passageway means.
Claim 5
Dependent Claim
20 words
The apparatus of claim 1 wherein the plurality of passageway means comprises between about five and about twelve passageway means.
Claim 6
Dependent Claim
22 words
The apparatus of claim 1, 2, 3 or 4 wherein the plurality of passageways comprise a plurality of uncurved primary vane means.
Claim 7
Dependent Claim
41 words
The apparatus of claim 5 wherein said plurality of passageway means further comprise a plurality of secondary vanes, each said secondary vane cooperating with at least one of said primary vane means to define at least one of said passageway means.
Claim 8
Dependent Claim
23 words
The apparatus of claim 6 wherein each of said secondary vanes is substantially parallel to at least one of said primary vane means.
Claim 9
Dependent Claim
20 words
The apparatus of claim 5 wherein said primary vane means are positioned in a substantially symmetrical configuration about said chamber.
Claim 10
Dependent Claim
18 words
The apparatus of claim 1 wherein the solid particle size ranges from about 8 to about 12 microns.
Claim 11
Dependent Claim
32 words
The apparatus of claim 1 wherein the radius of said chamber is between 4 and 10 feet and the height of said chamber ranges from about 4 feet to about 50 feet.
Claim 12
Dependent Claim
28 words
The apparatus of claim 1 wherein the product of the chamber height and the inlet area of each said passageway means is greater than about 56 cubic feet.
Claim 13
Dependent Claim
23 words
The apparatus of claim 11 wherein the product of said chamber height and said inlet area is greater than about 67 cubic feet.
Claim 14
Dependent Claim
29 words
The apparatus of claim 1 wherein the radius of said chamber is selected such that the tangential wall velocity of the mixture is less than 50 feet per second.
Claim 15
Dependent Claim
30 words
The apparatus of claim 13 wherein the radius of said chamber is selected such that the tangential wall velocity of the mixture is between 20 and 40 feet per second.
Claim 16
Dependent Claim
20 words
The apparatus of claim 13 wherein the inlet fluid flow rate is between 200 and 600 cubic feet per second.
Claim 17
Dependent Claim
30 words
The apparatus of claim 15 wherein the radius of said chamber is selected such that the tangential wall velocity of the mixture is between 20 and 40 feet per second.
Claim 18
Dependent Claim
53 words
The apparatus of claim 1 wherein the inlet area of each of the passageway means is between about 4 and about 12 square feet and the inlet radius of each said passageway means is between about 2.5 and about 7 feet, and the outlet radius is between about 0.5 and about 2 feet.
Claim 19
Dependent Claim
30 words
The apparatus of claim 17 wherein said inlet radius, Ri, the chamber height, h, and the chamber radius, Rw, are selected so that the following formula is satisfied: (Rih/Rw).sup.0.89 <11(ft).sup.1.1.
Claim 20
Dependent Claim
20 words
The apparatus of claim 18 wherein Ri,h and Rw are selected so that the following formula is satisfied: (Rih/Rw).sup.0.89 <9(ft).sup.1.1.
Claim 21
Dependent Claim
23 words
The apparatus of claim 17 wherein the product of said inlet radius and said inlet area is greater than about 16 cubic feet.
Claim 22
Dependent Claim
23 words
The apparatus of claim 20 wherein the product of said inlet radius and said inlet area is greater than about 19 cubic feet.
References Cited (Backward Citations)
US2654351A
Cited
US3034647A
Cited
US3969096A
Cited
US4081249A
Cited
US4316729A
Cited
US4229194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |