WO1996018449A1 - Ensemble de filtres et cartouche de filtre - Google Patents

Ensemble de filtres et cartouche de filtre Download PDF

Info

Publication number
WO1996018449A1
WO1996018449A1 PCT/GB1995/002794 GB9502794W WO9618449A1 WO 1996018449 A1 WO1996018449 A1 WO 1996018449A1 GB 9502794 W GB9502794 W GB 9502794W WO 9618449 A1 WO9618449 A1 WO 9618449A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
cartridge
filter element
end cap
pipe
Prior art date
Application number
PCT/GB1995/002794
Other languages
English (en)
Inventor
Alex George Hunter
George Pattison
Original Assignee
Process Scientific Innovations Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Process Scientific Innovations Limited filed Critical Process Scientific Innovations Limited
Publication of WO1996018449A1 publication Critical patent/WO1996018449A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0004—Details of removable closures, lids, caps or filter heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/10—Multiple layers

Definitions

  • the present invention relates to a filter assembly and to a filter cartridge or canister which can form part of that assembly.
  • the filter assembly In the pre-filtration or filtration of gas, for example gas streams from an air compressor, the filter assembly includes a filter head set up to have an out-to- in flow path, a removable filter bowl that fits onto the filter head and a removable cartridge within the filter bowl that demountably fits onto the filter head. Commonly, a drainage valve is provided at the bottom of the bowl to permit liquid condensate to be removed at intervals as required.
  • the most common cause of customer complaint about such filter assemblies is the failure of the manual or automatic drain device, whichever is fitted, due to grit or contamination in the airstream which prevents a seal from being re-established once the condensate has been drained out of the filter housing.
  • a second problem which exists with an out-to-in flow path is that where an oil indicator incorporated into the filter element of the cartridge to indicate e.g. the presence of oil contaminants in the incoming air stream, a colour change when the contaminants appear is not readily visible because the direction of flow through the filter element is inwards. That problem arises in particular in relation to adsorbent filter elements for removing traces of oil vapour in an airstream and which commonly have activated carbon as their working medium.
  • the invention provides a filter assembly comprising a filter housing set up to have an out-to-in flow path and a filter cartridge that fits into the housing and has means that cooperates with the filter housing to establish an in-to-out flow path through a tubular filter element forming part of the cartridge.
  • the invention provides a filter assembly comprising a filter head having a gas inlet annulus surrounding a central gas outlet passage, a filter bowl that fits the head, and a filter cartridge that fits to the filter head within the filter bowl, first means within the cartridge cooperating with the outer annulus to form a passage leading to a gas-tight space in the interior of the cartridge, and second means leading from the exterior of the cartridge gas-tightly to the gas outlet passage, so that the flow path of gas through the cartridge is in an in-to-out direction whilst the housing has been set up to flow out-to-in.
  • the invention provides a tubular filter cartridge comprising a tubular filter element, a first end cap at a proximal end of the filter element being shaped to fit an intended filter head, and a second end cap at a distal end of the filter element, the second end cap being annular, and a pipe extending from the second end cap through the filter element to the first end cap, an annular inlet port being defined between the proximal end of the pipe and the surrounding regions of the end cap and leading to a chamber defined between the pipe and the filter element from which in use fluid can flow radially outwards through the filter element, there being a fluid return path through the second end cap to a discharge port at the proximal end of the pipe.
  • Fig. 1 is a partly cut away view of a first form of filter cartridge according to the invention
  • Fig. 2 is a view in section showing the filter cartridge of Fig. 1 in position in a filter head;
  • Fig. 3 is a view in section showing a second form of the filter cartridge of the invention in position in a filter head;
  • Fig. 4 is a partly cut away view of a third form of the filter cartridge which is for use in a filter- regulator.
  • Fig. 5 is a view in section showing the filter cartridge of Fig. 4 in position in a filter-regulator.
  • a first form of filter cartridge according to the invention. It comprises a tubular adsorbent element (10) which is sandwiched between inner and outer foraminous sleeves (12,14) of e.g. expanded metal or plastics mesh and which is adhered to proximal and distal end caps (16,18) by adhesive (20) in manner known per se.
  • inner and outer foraminous sleeves (12,14) of e.g. expanded metal or plastics mesh and which is adhered to proximal and distal end caps (16,18) by adhesive (20) in manner known per se.
  • the element (10) comprises an inner fabric wrap (10a) of spunbonded polyamide fibres 25gsm and of thickness 0.12mm, and adsorbent layer (10b) formed of 3-4 wraps of activated carbon (32% by weight) held on a sheet of porous cellulose (Viscose) paper by means of a latex binder, an indicator layer (10c) in the form of a layer of spunbonded polyamide fibres 25gsm and of thickness 0.12mm impregnated with Kenmax Red OS which is an oil-soluble red dye, a dust filter (lOd) in the form of a sheet of borosilicate glass microfibre paper, and an outer fabric layer (lOe) in the form of spunbonded polyamide fibres 25gsm and 0.12mm thick.
  • adsorbent layer formed of 3-4 wraps of activated carbon (32% by weight) held on a sheet of porous cellulose (Viscose) paper by means of a latex binder
  • the sleeves (12,14) may be of expanded stainless steel and of open area about 60%.
  • the end caps may be moulded in a plastics material which may be filled with a reinforcing filler.
  • a reinforcing filler For example, they may be made of polybutylene terephthalate filled with glass.
  • the proximal end cap (16) is annular and has a lower portion (22) which is socketed to receive the element (10) and sleeves (12 and 14) and an upstanding annular wall (24) whose external surface is plain except for a groove adjacent to its end in which a sealing member in the form of an O-ring (26) e.g. of nitrile rubber is received.
  • the distal end cap (18) is cup-shaped when viewed in half-section with the element (10) and sleeve (12) locating against its outer wall (28) and with its inner wall (30) which is of lesser diameter than the internal diameter of the proximal end cap (16) at its lower portion (22) receiving the distal end of a pipe (32) which extends axially therefrom up through the cartridge to the proximal end cap (16).
  • the proximal end of the pipe (32) is enlarged as shown and has on its exterior surface a groove that receives a sealing member in the form of an 0-ring (34) above which is a threaded region (36). It will be appreciated that although in this instance the end cap (18) and pipe (32) are separate components, they may instead be formed as a single component.
  • air or gas contaminated with hydrocarbon vapour enters the cartridge through the annular port between end cap (16) and pipe (32) and enters a chamber (38) which is defined between the pipe (32) and the element (10). It then passes radially outwards through element (10) with any hydrocarbon vapour contaminants remaining trapped within the element (10). Return air re-enters the cartridge through end cap (18) and travels up through the pipe (32) to a discharge port at the proximal end thereof.
  • the present cartridge construction has the advantage that if the air or gas passing through the adsorbent element (10) is contaminated with droplets of liquid oil, the indicator dye present in layer (10c) is dissolved and colour appears at the exterior visible surface of the cartridge by reason of the in-to-out flow direction of the air or gas.
  • the adsorbent element (10) may be replaced by a filtering element e.g. a coalescing element.
  • a filtering element e.g. a coalescing element.
  • the tubular filter cartridge of Fig. 1 is shown fitted into a filter housing set up to have an out- to-in flow path and when so fitted establishes an in-to- out flow path through the tubular element (10) forming part of the cartridge.
  • the filter housing comprises a filter head (41) and a filter bowl (43) which fit removably together by a threaded or bayonet connection.
  • the filter bowl (43) is of a transparent plastics material.
  • the filter head has an inlet port (45) leading to a downwardly facing annular space (47).
  • a depending tubular wall (49) of the filter head is internally threaded at (51) to mate with the threaded region (36) of the pipe (32) and hold the filter cartridge in place on the filter head (41).
  • the depending tubular wall (49) leads to exit port (53) of the filter head.
  • Gas entering the inlet port of the filter head (45) which is typically compressed air contaminated with oil vapour passes into the chamber (38). Gas filtration is radial and the gas stream freed from oil vapour passes outwardly and downwardly to a quiet zone (55) in the filter bowl below the filter cartridge. In the event that the stream or gas becomes contaminated with oil a colour appears at the exterior of the cartridge and is visible through the bowl (43).
  • the material of the filtering or adsorbent element (10) may, instead of the particular construction set out above, be any conventional material in the filtration art and will depend upon the duty which the cartridge is to perform.
  • the cartridge is particularly suited for the filtration of compressed air e.g. in an air line leading from an air compressor and having a typical pressure of from 1 to 10 bar, or it may be fitted in a line leading from the discharge side of a vacuum pump. Examples of suitable materials for the element are set out below:
  • the element (10) may comprise wrapped layers of micron-sized polyester or nylon fibres in a non-woven spunbonded or needlebonded construction and may have a nominal cut-off of 20-25 ⁇ .
  • these are fluorocarbon impregnated to assist removal or drainage of filtered condensate.
  • a sintered tubular element may also be used but is less preferred.
  • the element may be of microfibres of inorganic material. Glass microfibres having low water affinity such as borosilicate glass microfibres are particularly suitable.
  • the element should have a structure and pore size such that it will retain particles and droplets having a size from 0.01 to 10 microns, and in particular particles of size less than 1.5 microns which form a major component of the entrained oil from a compressor or vacuum pump. Desirably the efficiency of particle entrapment is between 99.97 and 99.9999% when subjected to a dioctylphthalate test to ASTM D 1986-1971 (Military Standard 282).
  • the filtration or coalescing element may be formed from layers of sheet wrapped one around the other, it may be formed from pleated sheet or it may be made by moulding or vacuum forming. It may be unimpregnated with binder, in which case it is normally supported by a fabric which prevents migration of the medium. Alternatively, it may be impregnated with a resin binder which imparts hydrophobic and oleophilic properties and a degree of mechanical strength.
  • Suitable media for a coalescing filter include microfibrous filter materials as described in Patent Specification Nos. GB-A- 1014882 (Domnick Hunter) and GB-A-1544822 and GB-A- 1603519 (both of Process Scientific Innovations).
  • a drainage sleeve of coarser-porosity material may be provided outside the microfibrous filter element, and such a drainage sleeve may be of an open-celled foam material or may be a fabric treated with a fluorocarbon resin, as disclosed in US Patent 5129923 (Process Scientific Innovations), in order to reduce oil carry-over.
  • the element may, as indicated above, comprise 3-4 wraps of activated carbon or other adsorbent material held by latex or other binder onto a porous cellulose paper or other support. These are followed on the downstream side by a layer of microfibrous filter material to prevent particulate material being carried downstream, and optionally by an indicator layer impregnated into an oil-soluble dye.
  • the filter assembly of Fig. 3 is generally similar to that of Fig. 2 except that the filter generally indicated by the reference numeral 60 is of the type described in our International Publication No. WO 93/10881 (Process Scientific Innovations), the disclosure of which is incorporated herein by reference.
  • the cartridge has a pleated borosilicate glass filter element (62) and a macroporous foam drainage layer (64) or a polyester needlefelt layer which may be fluorocarbon treated.
  • the drainage layer (64) is typically a PVC impregnated reticulated polyether or polyurethane foam having typically 60 pores per inch. The drainage layer fits into the lower end cap (66) but is uncompressed and unobstructed.
  • the end cap (66) is slotted to permit oil from the drainage layer (64) to pass dropwise down through it and has a guard (68) which defines a relatively quiet zone in which the oil droplets can form so that in use air flow through a wet band forming at the lower end of the cartridge (60) is minimised.
  • Finger grips (70) on the outside of the guard (68) enable the filter element to be offered to and removed from the filter head (41) without risk of damage to the drainage layer (64).
  • a filter having the above-mentioned structure can provide a significant reduction in pressure drop at high air flow rates, and that the amount of oil mist appearing on the clean side of the filter is less than half the amount of oil mist present using a coalescing filter in which the drainage sleeve (64) is tightly fitted into a channel in the distal end cap.
  • the lower end cap (66) approaches closely to the inner surface of the filter bowl (43) leaving only a small annulus between them.
  • the area of that annulus is less than the area of the pipe (32).
  • Coalesced droplets of water are entrained in a relatively high velocity downwardly travelling airstream as they pass the end cap (66) so that the droplets of water are propelled towards the lower end of the filter bowl (43). After it has passed the end cap (66), the airstream is in the quiet region (55) where its velocity is reduced, and as it returns up the pipe (32) the tendency for droplets of water to be re-entrained in the rising airstream to be carried in the air leaving the discharge port (53) is reduced.
  • the cartridge used is the same as in Figure 2 except that the pipe (32) has at its proximal end an integrally moulded upwardly facing cup (70) that as seen in Figure 5 provides support for parts of a pressure-reducing and regulating valve mechanism generally indicated by the reference numeral (72) and of a type known per se.
  • Rotation of a shaft (74) applies or removes load from an adjustment spring (76), and when no load is applied the valve (72) is closed.
  • the spring (76) is loaded, the load is transmitted through a flexible diaphragm (78) to the valve (72), opening the valve.
  • the diaphragm (78) is exposed to air or gas at the outlet side (80) of the filter head (82) so that as the outlet pressure rises the force on the diaphragm (78) is increased, compressing the adjusting spring (76) the load exerted by the spring is equal to the load exerted on diaphragm (78) by the air or gas leaving the filter head (82). Movement of the diaphragm (78) is transmitted to the valve (72) by means of a link (84) so that the valve (72) is opened or closed as the diaphragm (78) moves up or down.
  • a cartridge of the present kind does not require significant alteration of the filter head (82) (which has to be set up in the out- to-in flow direction shown) and associated regulator valve mechanism.
  • the use of an adsorbent cartridge has been illustrated, other kinds of cartridge such as a pre- or coarse-filter cartridge or coalescing filter cartridge could be used instead.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un élément de filtre qui s'insère dans une tête de filtre normalement prévue pour un écoulement de gaz de l'extérieur vers l'intérieur à travers une cartouche de filtre. Cet élément comporte un tuyau (32) définissant avec une paroi verticale d'un bouchon (16) un passage d'entrée étanche aux gaz conduisant à un espace (38) dans l'élément de filtre (10). Un passage de retour pour le gaz filtré est assuré par le tuyau (32) qui s'étend à partir d'un bouchon à ouverture (18) de l'élément de filtre à travers l'intérieur de ce dernier vers la première extrémité. Ces configurations changent alors la trajectoire d'écoulement et l'orientent de l'intérieur vers l'extérieur. En service, dans le cas d'une cartouche de filtre, ce type de filtre a moins tendance à provoquer des blocages du tuyau d'évacuation (55) du carter de filtre qui est moins exposé aux contaminations par la matière solide. Dans le cas d'un filtre adsorbant, un matériau indicateur peut être prévu qui devient visible sur la surface extérieure du filtre lors de l'exposition de celui-ci aux gouttelettes d'huile.
PCT/GB1995/002794 1994-12-16 1995-11-29 Ensemble de filtres et cartouche de filtre WO1996018449A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9425492A GB2295970A (en) 1994-12-16 1994-12-16 Filter assembly and cartridge therefor
GB9425492.7 1994-12-16

Publications (1)

Publication Number Publication Date
WO1996018449A1 true WO1996018449A1 (fr) 1996-06-20

Family

ID=10766098

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002794 WO1996018449A1 (fr) 1994-12-16 1995-11-29 Ensemble de filtres et cartouche de filtre

Country Status (2)

Country Link
GB (1) GB2295970A (fr)
WO (1) WO1996018449A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111344543A (zh) * 2017-11-14 2020-06-26 D & P 创新私人有限公司 分离固体监测系统

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19720775A1 (de) * 1997-05-17 1998-11-19 Mann & Hummel Filter Vorrichtung sowie Element zur Flüssigkeitsabscheidung in Gasströmen
US6663685B2 (en) 1997-12-15 2003-12-16 Domnick Hunter Limited Filter assembly
AU1674999A (en) 1997-12-15 1999-07-05 Domnick Hunter Limited Filter assembly
DE69824042T2 (de) 1997-12-15 2005-06-16 Domnick Hunter Limited Filteranlage
US6409786B1 (en) 1997-12-15 2002-06-25 Domnick Hunter Limited Filter assembly
AU1675499A (en) * 1997-12-15 1999-07-05 Domnick Hunter Limited Filter assembly
AU1675399A (en) 1997-12-15 1999-07-05 Domnick Hunter Limited Filter assembly
WO1999030799A1 (fr) * 1997-12-15 1999-06-24 Domnick Hunter Limited Ensemble filtre
DE19827297A1 (de) * 1998-06-19 1999-12-23 Mann & Hummel Filter Vorrichtung zur Abscheidung einer Phase aus einem zu reinigenden Fluid
DE10024424A1 (de) * 2000-05-19 2001-11-29 Baerbel Trost Filtergehäuse
US20020074292A1 (en) 2000-09-26 2002-06-20 Andreas Schlegel Adsorption vessels
BR0114198B1 (pt) * 2000-09-26 2012-02-22 unidades de filtração percorrìveis por meios para remoção de substáncias nocivas de lìquidos.
DE10052524A1 (de) * 2000-10-23 2002-04-25 Beko Technologies Gmbh Filter zum Abscheiden von Fremdstoffen aus einem Gasstrom
GB0417459D0 (en) * 2004-08-05 2004-09-08 Domnick Hunter Ltd Filter assembly
GB0417463D0 (en) * 2004-08-05 2004-09-08 Domnick Hunter Ltd Filter assembly
WO2006013326A1 (fr) * 2004-08-05 2006-02-09 Domnick Hunter Limited Assemblage de filtre
GB2420511B (en) * 2005-12-17 2007-08-22 Yet Chang Mobile Goods Co Ltd Air filter for car
GB0812457D0 (en) 2008-07-08 2008-08-13 Parker Hannifin U K Ltd A Filter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH477216A (de) * 1967-08-17 1969-08-31 Norgren Ltd C A Filtervorrichtung zur Filtration von Luft oder anderen gasförmigen Medien
GB2063098A (en) * 1979-11-13 1981-06-03 Orion Machinery Co Ltd Filter element for filtering compressed air
GB2126497A (en) * 1982-09-09 1984-03-28 Domnick Hunter Filters Ltd Coalescing filter element
EP0231862A2 (fr) * 1986-01-27 1987-08-12 Cuno Incorporated Cartouche de filtre à changement rapide et sa partie supérieure
WO1990002597A1 (fr) * 1988-09-09 1990-03-22 Process Scientific Innovations Limited Ensemble de filtrage et cartouche prevue a cet effet

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2510225C2 (de) * 1974-03-11 1986-09-11 Pall Corp., Glen Cove, N.Y. Vorrichtung zum Abscheiden von in Gasen schwebenden Flüssigkeiten
GB1566264A (en) * 1976-04-23 1980-04-30 Whatman Reeve Angel Ltd Inside-to-outside flow filter tube and method of manufacturing same
SE410399B (sv) * 1976-10-08 1979-10-15 Lectrostatic Ab Naetfilter avsett att arbeta med hoega pulserande tryck
GB2033247B (en) * 1978-10-18 1982-11-03 Process Scient Innovations Filter silencer for compressed gas stream
JPS5676018U (fr) * 1979-11-13 1981-06-20
US4317727A (en) * 1980-06-18 1982-03-02 Meissner Manufacturing Company, Inc. Fluid filter cartridge and method of its construction
DE3916744C2 (de) * 1989-05-23 1994-02-03 Sartorius Gmbh Rohrförmiges Filterelement
GB2261830B (en) * 1991-11-26 1995-07-26 Process Scient Innovations Filter for purification of gas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH477216A (de) * 1967-08-17 1969-08-31 Norgren Ltd C A Filtervorrichtung zur Filtration von Luft oder anderen gasförmigen Medien
GB2063098A (en) * 1979-11-13 1981-06-03 Orion Machinery Co Ltd Filter element for filtering compressed air
GB2126497A (en) * 1982-09-09 1984-03-28 Domnick Hunter Filters Ltd Coalescing filter element
EP0231862A2 (fr) * 1986-01-27 1987-08-12 Cuno Incorporated Cartouche de filtre à changement rapide et sa partie supérieure
WO1990002597A1 (fr) * 1988-09-09 1990-03-22 Process Scientific Innovations Limited Ensemble de filtrage et cartouche prevue a cet effet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111344543A (zh) * 2017-11-14 2020-06-26 D & P 创新私人有限公司 分离固体监测系统
CN111344543B (zh) * 2017-11-14 2022-06-14 D & P 创新私人有限公司 分离固体监测系统

Also Published As

Publication number Publication date
GB9425492D0 (en) 1995-02-15
GB2295970A (en) 1996-06-19

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