US5605748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber beds for fiber bed mist eliminators
Assignee: MECS Inc
•
Filing: 1994-01-19
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Granted: 1997-02-25
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Expires: 2014-01-19
Abstract
Abstract There is provided a fiber bed for removing liquid aerosols and soluble solids from a gas stream in a fiber bed mist eliminator. The fiber bed is in the form of a flexible mat having a void fraction of greater than about 0.89 and greater than about 700 net collection targets. The mat includes a layer of collecting fibers having an average fiber diameter between about 1 and about 5 μm. The collecting fibers are stabilized by a plurality of stabilizing fibers which penetrate into and are disposed interstitially within the collecting fiber layer. The improved fiber bed of the present invention is field-replaceable and, by utilizing fibers having a small average diameter, the thickness of the fiber bed may be reduced.
Inventors
- 👤 Eugene D. Kennedy
- 👤 John S. Merz
- 👤 Prabhakar D. Paranjpe
- 👤 Albert E. Tung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:15
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0027; B01D46/003; B01D46/0031; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/20; B01D39/2003; B01D39/2017; B01D46/24; B01D2265/00; B01D2265/06; B01D2275/00; B01D2275/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24116; Y10T428/24124; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/107; Y10T442/133; Y10T442/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
174 words
A field-replaceable fiber bed for use in a fiber bed mist eliminator for removing aerosols and soluble solids from a moving gas stream, the fiber bed in the form of a flexible mat having a void fraction exceeding about 0.89 and in excess of about 700 net collection targets, the mat comprising: a layer of collecting fibers having an average fiber diameter between about 1 μm and about 5 μm, the collecting fiber layer having a first face and a second face; and a plurality of stabilizing fibers for positionally stabilizing the collecting fibers of the mat, the stabilizing fibers penetrating into and disposed interstitially within the collecting fiber layer such that the stabilizing fibers extend into the collecting fiber layer in the thickness direction thereof and in a direction generally parallel to the direction of gas flow through the mat, the number of stabilizing fibers and the extent to which the stabilizing fibers penetrate into the collecting fiber layer being sufficient so that the collecting fibers are mechanically stable under design operating conditions.
Claim 2
Dependent Claim
174 words
A field-replaceable fiber bed for use in a fiber bed mist eliminator for removing aerosols and soluble solids from a moving gas stream, the fiber bed in the form of a flexible mat having a void fraction exceeding about 0.89 and in excess of about 700 net collection targets, the mat comprising: a layer of collecting fibers having an average fiber diameter between about 1 μm and about 5 μm, the collecting fiber layer having a first face and a second face; and a plurality of stabilizing fibers for positionally stabilizing the collecting fibers of the mat, the stabilizing fibers penetrating into and disposed interstitially within the collecting fiber layer such that the stabilizing fibers extend into the collecting fiber layer in the thickness direction thereof and in a direction generally parallel to the direction of gas flow through the mat, the number of stabilizing fibers and the extent to which the stabilizing fibers penetrate into the collecting fiber layer being sufficient so that the collecting fibers are mechanically stable under design operating conditions.
Claim 3
Dependent Claim
47 words
The fiber bed of claim 1 wherein the stabilizing fibers have a larger average fiber diameter than the collecting fibers such that the ratio of the average fiber diameter of the stabilizing fibers to the average fiber diameter of the collecting fibers is at least about 2:1.
Claim 4
Dependent Claim
13 words
The fiber bed of claim 2 wherein the collecting fibers comprise glass fibers.
Claim 5
Dependent Claim
23 words
The fiber bed of claim 3 wherein the glass fibers comprise fibers ranging in diameter from about 0.3 μm to about 15 μm.
Claim 6
Dependent Claim
30 words
The fiber bed of claim 3 wherein the stabilizing fibers comprise a mixture of tetrafluoroethylene polymer fibers and other polymeric fibers made of material selected from polypropylene, polyester or nylon.
Claim 7
Dependent Claim
41 words
The fiber bed of claim 5 wherein the weight ratio of the tetrafluoroethylene polymer fibers disposed interstitially within the collecting fiber layer to the other polymeric fibers disposed interstitially within the collecting fiber layer is between about 2:1 and about 5:1.
Claim 8
Dependent Claim
13 words
The fiber bed of claim 2 wherein the collecting fibers comprise polymeric fibers.
Claim 9
Dependent Claim
24 words
The fiber bed of claim 7 wherein the collecting fibers comprise polymeric fibers selected from the group consisting of polypropylene fibers and polyester fibers.
Claim 10
Dependent Claim
13 words
The fiber bed of claim 1 wherein the mat further comprises a scrim.
Claim 11
Dependent Claim
23 words
The fiber bed of claim 9 wherein the scrim is disposed within the collecting fiber layer, the stabilizing fibers passing through the scrim.
Claim 12
Dependent Claim
27 words
The fiber bed of claim 9 wherein the scrim is disposed adjacent to a face of the collecting fiber layer, the stabilizing fibers passing through the scrim.
Claim 13
Dependent Claim
32 words
The fiber bed of claim 1 wherein the mat further comprises a preliminary filtration layer positioned upstream of the collecting fiber layer relative to the direction of gas flow through the mat.
Claim 14
Dependent Claim
30 words
The fiber bed of claim 12 wherein the preliminary filtration layer is comprised of fiber material having an average fiber diameter ranging from about 8 μm to about 50 μm.
Claim 15
Dependent Claim
31 words
The fiber bed of claim 1 wherein the mat further comprises a reentrainment layer positioned downstream of the collecting fiber layer relative to the direction of gas flow through the mat.
Claim 16
Dependent Claim
29 words
The fiber bed of claim 14 wherein the reentrainment layer is comprised of fiber material having an average fiber diameter ranging from about 20 μm to about 100 μm.
Claim 17
Dependent Claim
27 words
The fiber bed of claim 3 further comprising a scrim and a preliminary filtration layer, the stabilizing fibers passing through the scrim and the preliminary filtration layer.
Claim 18
Dependent Claim
37 words
A fiber bed element for use in a fiber bed mist eliminator, the fiber bed element comprising the field-replaceable fiber bed as set forth in claim 1, a fiber bed support and a fiber bed securing means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-25 | 2000-08-26 | 2001-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-25 | 2004-08-26 | 2005-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-25 | 2008-08-26 | 2009-02-25 | $7700.00 | Window Closed / Lapsed |