EP0353903A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for gas-liquid separation and filtration
Assignee: Pall Corp
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Filing: 1989-07-18
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Granted: —
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Expires: 2009-07-18
Abstract
Abstract An air filtering device and related method for the removal of liquids and particulate matter from an air stream such as may be used in an aircraft environmental control system. The invention is comprised of an inertial separator (29) and a combination coalescer (14) and HEPA-rated filter (15) preferably all located in the same housing. Air entering the housing flows into an inertial separator (25) which removes most of the entrained liquid from the air. Substantially all of the remaining liquid is eliminated by the coalescing element (14) with the coalescer functioning at least in part as an evaporator due to the low saturation level of the air flowing from the inertial separator. Biological and other particulate removal is accomplished by the subsequent passing of the air through the HEPA-rated (15) filter medium.
Inventors
- 👤 Harry D. Cordes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:21
CPC Classifications
B; B01; B01D; B01D50/00; B01D50/20; F; F01; F01M; F01M13/00; F01M13/04; F01M2013/0422; F01M2013/0427; F01M2013/0438; Y; Y10; Y10S; Y10S55/00; Y10S55/25
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
75 words
A gas-liquid separating and filtering apparatus comprising: a) a housing, said housing having a separate gas inlet and gas outlet; b) means for gas-liquid separation located within said housing; c) means for removing the separated liquid from said housing; d) an annular separating and filtering device downstream from said separating means and within said housing comprising: i) a coalescing medium; and ii) a particulate filter in close proximity to and downstream from said coalescing element.
Claim 2
Dependent Claim
75 words
A gas-liquid separating and filtering apparatus comprising: a) a housing, said housing having a separate gas inlet and gas outlet; b) means for gas-liquid separation located within said housing; c) means for removing the separated liquid from said housing; d) an annular separating and filtering device downstream from said separating means and within said housing comprising: i) a coalescing medium; and ii) a particulate filter in close proximity to and downstream from said coalescing element.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 wherein said annular filtering device has said coalescing medium as its outer element and said particulate filter as its inner element.
Claim 4
Dependent Claim
15 words
The apparatus of claim 2 wherein said means for air-liquid separation is an inertial separator.
Claim 5
Dependent Claim
13 words
The apparatus of claim 3 wherein said particulate filter is a HEPA-rated filter.
Claim 6
Dependent Claim
15 words
The apparatus of claim 4 wherein said coalescing element is a graduated pore Profile® element.
Claim 7
Dependent Claim
15 words
The apparatus of claim 5 wherein said HEPA-rated filter is a graduated pore Profile® element.
Claim 8
Dependent Claim
42 words
The apparatus of claim 5 further comprising means for removing coalesced liquid located on said apparatus in a position that will allow it to be at its lowest point when the structure onto which the apparatus is installed is normally at rest.
Claim 9
Independent Claim
54 words
A method for gas-liquid separation and removal of particulate matter comprising the steps: a) separating substantially all liquid aerosols above about 25 microns in diameter; b) draining said separated liquid aerosols; c) coalescing the remaining liquid aerosols; d) evaporating liquid from said coalescing element; and e) filtering said particulate matter from said gas stream.
Claim 10
Independent Claim
54 words
A method for gas-liquid separation and removal of particulate matter comprising the steps: a) separating substantially all liquid aerosols above about 25 microns in diameter; b) draining said separated liquid aerosols; c) coalescing the remaining liquid aerosols; d) evaporating liquid from said coalescing element; and e) filtering said particulate matter from said gas stream.
Claim 11
Dependent Claim
17 words
The method of claim 8 wherein the separating step (a) is completed using an inertial separator .
Claim 12
Dependent Claim
16 words
The method of claim 9 wherein the filtration step (e) is completed using a HEPA-rated filter.
Claim 13
Dependent Claim
15 words
The method of claim 10 wherein said coalescing element is a graduated pore Profile® element.
Claim 14
Dependent Claim
15 words
The method of claim 11 wherein said HEPA-rated filter is a graduated pore Profile® element.
Claim 15
Dependent Claim
21 words
The method of claim 11 wherein after step (d) any coalesced liquid which did not evaporate is drained from the apparatus.
References Cited (Backward Citations)
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