GB2116446A - Dry cleaning filter assembly - Google Patents
Dry cleaning filter assembly Download PDFInfo
- Publication number
- GB2116446A GB2116446A GB08306580A GB8306580A GB2116446A GB 2116446 A GB2116446 A GB 2116446A GB 08306580 A GB08306580 A GB 08306580A GB 8306580 A GB8306580 A GB 8306580A GB 2116446 A GB2116446 A GB 2116446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- housing
- peripheral surface
- filter
- filter assembly
- dry cleaning
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000005108 dry cleaning Methods 0.000 title claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims 1
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000012065 filter cake Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
- D06F43/08—Associated apparatus for handling and recovering the solvents
- D06F43/081—Reclaiming or recovering the solvent from a mixture of solvent and contaminants, e.g. by distilling
- D06F43/085—Filtering arrangements; Filter cleaning; Filter-aid powder dispensers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
- B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/02—Filtering elements having a conical form
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtration Of Liquid (AREA)
Abstract
A filter assembly for dry cleaning fluid comprises a housing (1) with an inlet (4) and an outlet (5) containing an annular filter element (6). One or both of the outer surface of the element (6) and the inner surface of the housing (1) tapers in the axial direction, to facilitate easy withdrawal of the element from the housing past door (3), despite accumulation of filter cake in inlet space (8). <IMAGE>
Description
SPECIFICATION
Dry cleaning filter assembly
Typical filter assemblies through which dirty solvent is recycled in dry cleaning plants comprise a cylindrical housing and an annular filter element which is inserted into the housipg through a door at one end of the housing. The element has an annular configuration of filter material, such as pleated paper, the ends of which are fixed to comparatively ridid end caps. When installed, the end caps seal against the ends of the housing to seal an annular inlet chamber between the inner peripheral surface of the housing wall and the outer peripheral surface of the element from the interior of the element which communicates with an axial outlet usually through the closed end of the housing.In use dirty solvent enters the inlet chamber through an inlet in the housing wall, passes radially inwardly through the filter material, and out through the outlet. Granular absorption materials may be packed in the interior of the element.
In order to maximize the filter surface area, the filter elements are as large as possible and spaced by only a small gap from the inner peripheral surface of the housing wall. Although small particles to be filtered out of the solvent will settle in the filter material, fibrous and other coarse structured particles settle on the outer periphery of the element in the form of a greasy mat. This in itself forms an additional fine filter bed which encourages the buildup of particles. Very quickly the gap between the outer surface of the filter element and the inner surface of the housing becomes clogged and the filter element has to be withdrawn axially through the door opening at the end of the housing for replacement.
This withdrawal of the element is impeded by the greasy mat which tends to be rubbed off the filter element, owing to the relative movement between the element and housing upon withdrawal. This is exacerbated by the end cap at the trailing end of the element, which provides a scraping action. Jamming frequently occurs and it becomes a messy and inconvenient job to remove the spent filter element. Even when it has been removed much of the dirty particulate material remains in the housing and has to be cleaned out before a new filter element can be inserted.
I have now appreciated that an important contributory factor to this problem is that in conventional assemblies, the external peripheral surface of the element and the internal peripheral surface of the housing wall are cylindrical and parallel to one another.
In accordance with the present invention, I believe that the problem can be avoided by tapering one or both of the external peripheral surface of the filter element and the internal peripheral surface of the housing wall in the axial direction opposite to that in which the element is arranged to be withdrawn from the housing for replacement.
The invention is equally applicable to the case in which a single element is used in the housing, or in which two or more axially shorter elements are fitted into the housing in series.
An example of a filter assembly constructed in accordance with the present invention is illustrated in the accompanying drawing which is a vertical axial section.
The illustrated assembly has a cylindrical housing 1 mounted with its axis horizontal and having a fixed end wall 2 and, at its other end a hinged door 3. An inlet 4 for dirty solvent leads into the peripheral wall of the housing and an outlet 5 for filtered solvent leads out to the end wall 2. An annular filter element 6, the peripheral surface 7 of which is tapered to provide a gap 8 of increasing width in a direction away from the door 3, is installed in the housing 1. The element 6 has rigid end caps 9 and 10 provided with annular felt seals 11 which seal respectively against the end wall 2 and the door 3 when it is closed. These seal the inlet chamber formed in the gap 8 from the interior 12 of the element. A porous tube 13 fixed to the end wall 2, extends through the element and end caps 9 and 10 to locate the element in position, and communicates with the outlet 5.
In use the flow of solvent to be cleaned is as shown by the arrows. The tapering of the surface 7 facilitates removal of the filter element for replacement without the previously mentioned conventional jamming problems.
Claims (2)
1. A dry cleaning plant having a solvent filter assembly comprising a substantially cylindrical housing, an annular filter element having a substantially cylindrical outer peripheral surface mounted within the housing, an inlet in a wall of the housing leading into an inlet chamber formed by an annular space between the outer surface of the element and the inner peripheral surface of the housing, an outlet leading through an end wall of the housing, and means sealing the inlet chamber from the outlet other than through the filter element; wherein one or both of the outer peripheral surface of the element and the inner peripheral surface of the housing tapers in the axial direction opposite to that in which the filter element is arranged to be withdrawn from the housing for replacement.
2. A filter assembly according to claim 1, substantially as described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08306580A GB2116446B (en) | 1982-03-13 | 1983-03-10 | Dry cleaning filter assembly |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8207409 | 1982-03-13 | ||
| GB08306580A GB2116446B (en) | 1982-03-13 | 1983-03-10 | Dry cleaning filter assembly |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8306580D0 GB8306580D0 (en) | 1983-04-13 |
| GB2116446A true GB2116446A (en) | 1983-09-28 |
| GB2116446B GB2116446B (en) | 1985-10-02 |
Family
ID=26282248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08306580A Expired GB2116446B (en) | 1982-03-13 | 1983-03-10 | Dry cleaning filter assembly |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2116446B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB773490A (en) * | 1955-10-07 | 1957-04-24 | Fram Corp | Improvements relating to filters for volatile liquids |
| GB942575A (en) * | 1961-01-02 | 1963-11-27 | American Mach & Foundry | Filtering device |
| GB1114266A (en) * | 1964-11-16 | 1968-05-22 | Joseph John Russo | Oil cleaner |
| GB1236805A (en) * | 1968-10-10 | 1971-06-23 | Joseph John Russo | An oil cleaner |
| GB1492431A (en) * | 1975-02-01 | 1977-11-16 | Neil & Spencer Ltd | Filter units for dry cleaning machines |
| GB1524100A (en) * | 1975-11-27 | 1978-09-06 | Daimler Benz Ag | Lubricating-oil filter |
| EP0025628A2 (en) * | 1979-09-12 | 1981-03-25 | NoeL, MARQUET & CIE société anonyme: | Filter for liquids with automatic cleaning of the filtration element |
-
1983
- 1983-03-10 GB GB08306580A patent/GB2116446B/en not_active Expired
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB773490A (en) * | 1955-10-07 | 1957-04-24 | Fram Corp | Improvements relating to filters for volatile liquids |
| GB942575A (en) * | 1961-01-02 | 1963-11-27 | American Mach & Foundry | Filtering device |
| GB1114266A (en) * | 1964-11-16 | 1968-05-22 | Joseph John Russo | Oil cleaner |
| GB1236805A (en) * | 1968-10-10 | 1971-06-23 | Joseph John Russo | An oil cleaner |
| GB1492431A (en) * | 1975-02-01 | 1977-11-16 | Neil & Spencer Ltd | Filter units for dry cleaning machines |
| GB1524100A (en) * | 1975-11-27 | 1978-09-06 | Daimler Benz Ag | Lubricating-oil filter |
| EP0025628A2 (en) * | 1979-09-12 | 1981-03-25 | NoeL, MARQUET & CIE société anonyme: | Filter for liquids with automatic cleaning of the filtration element |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8306580D0 (en) | 1983-04-13 |
| GB2116446B (en) | 1985-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |