US4144040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for demisting gases
Assignee: Bakaert NV SA
•
Filing: 1976-09-13
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Granted: 1979-03-13
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Expires: 1996-09-13
Abstract
Abstract Method and apparatus for demisting gases wherein a stream of gas containing submicron liquid particles is caused to pass through a filter material comprising at least in part a material having a porosity of at least 0.985.
Inventors
- 👤 Jozef Claes
- 👤 Roger De Bruyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:14
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0012; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2041; B01D39/2044; B01D46/0027; B01D46/003; B01D46/0031; B01D46/24; B01D53/00; B01D53/26; B01D53/266
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
131 words
Filtration apparatus for the removal of liquid particles from a stream of gas comprising filtration means including a plurality of adjacent non-woven metal fiber webs, means for passing a stream of gas containing liquid particles at least some of which are of submicron dimensions through said filter means at a velocity of less than 70 cm/sec, means for removing from said filtration means said stream of gas from which at least some of said particles including at least some of said submicron particles have been removed, and outlet means for the removed liquid, the diameter of the fibers in successive ones of said webs decreasing in the direction of flow of the gas stream, said filtration means having a porosity of at least 0.985 and being moistenable by said liquid particles.
Claim 2
Dependent Claim
131 words
Filtration apparatus for the removal of liquid particles from a stream of gas comprising filtration means including a plurality of adjacent non-woven metal fiber webs, means for passing a stream of gas containing liquid particles at least some of which are of submicron dimensions through said filter means at a velocity of less than 70 cm/sec, means for removing from said filtration means said stream of gas from which at least some of said particles including at least some of said submicron particles have been removed, and outlet means for the removed liquid, the diameter of the fibers in successive ones of said webs decreasing in the direction of flow of the gas stream, said filtration means having a porosity of at least 0.985 and being moistenable by said liquid particles.
Claim 3
Dependent Claim
17 words
Apparatus as in claim 1 and wherein said filtration means has a porosity of 0.99 during filtration.
Claim 4
Dependent Claim
18 words
Apparatus as claimed in claim 1 wherein the said filter material has a porosity of at least 0.995.
Claim 5
Dependent Claim
14 words
Apparatus as claimed in claim 1 wherein said metal fibers are stainless steel fibres.
Claim 6
Dependent Claim
15 words
Apparatus as claimed in claim 1 wherein the webs comprise fibers having a rough surface.
Claim 7
Dependent Claim
17 words
Apparatus as claimed in claim 1 wherein the filter material has a thickness not exceeding 10 cms.
Claim 8
Dependent Claim
24 words
Apparatus as claimed in claim 1 wherein the filter material is in the form of concentrically arranged hollow cylinders having concentric free spaces therebetween.
Claim 9
Dependent Claim
20 words
Apparatus as claimed in claim 7 wherein the filter material is retained by means of a framework of wire netting.
Claim 10
Dependent Claim
18 words
Apparatus as claimed in claim 1 wherein the web comprises fibres having a diameter of 1 to 50μ.
Claim 11
Dependent Claim
18 words
Apparatus as claimed in claim 9 wherein the web comprises fibres having a diameter of 1 to 10μ.
Claim 12
Independent Claim
114 words
A method for filtering a stream of gas at high efficiency for removing liquid particles at least some of which are of submicron dimensions therefrom comprising passing the stream of gas at a velocity of less than 70 cm/sec through a filter material comprising a plurality of adjacent non-woven metal fiber webs moistenable by said liquid particles, the diameter of the fibres in successive webs decreasing in the direction of flow of the gas stream and the webs having a porosity of at least 0.985 whereby at least some of said particles including at least some of said submicron particles are removed from the gas stream, and removing captured liquid from the filter material.
Claim 13
Independent Claim
114 words
A method for filtering a stream of gas at high efficiency for removing liquid particles at least some of which are of submicron dimensions therefrom comprising passing the stream of gas at a velocity of less than 70 cm/sec through a filter material comprising a plurality of adjacent non-woven metal fiber webs moistenable by said liquid particles, the diameter of the fibres in successive webs decreasing in the direction of flow of the gas stream and the webs having a porosity of at least 0.985 whereby at least some of said particles including at least some of said submicron particles are removed from the gas stream, and removing captured liquid from the filter material.
Claim 14
Dependent Claim
18 words
A method as in claim 11 and wherein said filter material has a porosity of 0.985 during filtration.
Claim 15
Dependent Claim
18 words
A method as in claim 11 and wherein said filter material has a porosity of at least 0.995.
Claim 16
Dependent Claim
14 words
A method as in claim 11 and wherein said fibers are stainless steel fibers.
Claim 17
Dependent Claim
14 words
A method as in claim 11 and wherein said fibers have a rough surface.
Claim 18
Dependent Claim
17 words
A method as in claim 11 and wherein said fibrous web has been needle punched or pressed.
Claim 19
Dependent Claim
19 words
A method as in claim 11 and wherein said fibrous web has a thickness not greater than 10 cm.
Claim 20
Dependent Claim
25 words
A method as in claim 11 and wherein said filter material is in the form of concentrically arranged hollow cylinders having concentric free spaces therebetween.
Claim 21
Dependent Claim
22 words
A method as in claim 18 and wherein said filter material includes a framework of wire netting for retaining said filter material.
Claim 22
Dependent Claim
17 words
A method as in claim 11 and wherein said fibers have a diameter of 1 to 50μ.
Claim 23
Dependent Claim
17 words
A method as in claim 20 and wherein said fibers have a diameter of 1 to 10μ.
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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) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |