WO1999062615A1 - Prefiltration unit - Google Patents
Prefiltration unit Download PDFInfo
- Publication number
- WO1999062615A1 WO1999062615A1 PCT/FI1999/000470 FI9900470W WO9962615A1 WO 1999062615 A1 WO1999062615 A1 WO 1999062615A1 FI 9900470 W FI9900470 W FI 9900470W WO 9962615 A1 WO9962615 A1 WO 9962615A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- space
- flow
- oil tank
- filter
- Prior art date
Links
- 238000011045 prefiltration Methods 0.000 title claims abstract description 28
- 238000005461 lubrication Methods 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000012423 maintenance Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 93
- 239000003570 air Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000010724 circulating oil Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
- B01D35/0276—Filtering elements with a vertical rotation or symmetry axis mounted on tanks or reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration
Definitions
- the present invention relates to a prefiltration unit as defined in the preamble of claim 1.
- oil circulating lubrication systems in which lubricating oil is circulated by a single continuous system to all parts of the process that need lubrication.
- the lubricant is always returned from the object of lubrication into an oil tank in a central unit. Since, depending on the process, the oil always gathers some impurities, such as rubbish, water and air bubbles, as it is circulating in the system, it is necessary to purify the oil at some stage during the circulation.
- the return line of an oil circulating lubrication system is provided with a coarse strainer to separate coarse impurities from the oil flow before they get into the oil tank.
- the oil tank itself is generally constructed or designed with a view to accomplishing removal of water or air from the oil by the tank itself or separate spaces in conjunction with it.
- the tank may also be provided with sieve-like partitions to separate impurities.
- a specific object of the present invention is to disclose a new type of prefiltration unit for oil circulating lubrication systems which is efficient and reliable, which can be easily installed in both new oil tanks and in tanks already in use in oil circulating lubrication systems and which makes it possible to improve the overall purity of circulating oil, i.e. to reduce the amounts of solid matter, water and air contained in the oil.
- the prefiltration unit of the invention for separating coarse impurities from the oil flow in an oil circulating lubrication system before the oil tank comprises a filter placed in conjunction with the oil tank.
- the prefiltration unit comprises an oil flow space mounted in an opening in the top of the oil tank, an inlet space connected to the flow space via a flow connection and provided with an air lock, the returning oil being passed into said inlet space via an oil flow inlet pipe, and at least one filter between the flow space and the oil tank for filtering the oil received from the inlet space into the flow space before it flows into the oil tank.
- an air lock is used to cut off air flow and prevent the entry of air and humid gases into the oil purifying areas.
- the filter preferably forms a space extending substantially downward from the flow space, so that the oil can freely and smoothly flow from the flow space into said space.
- the downward extending space forming the filter is preferably located completely above the oil surface of the oil tank in an operating situation, i.e. when some of the oil in the system is in circulation.
- the filter works efficiently while the oil is flowing downward along the filter en- velope and clean oil is passed through the filter envelope and impurities flow down without turbulence along the interior surface of the filter envelope to the bottom of the filter.
- the filter preferably consists of a cylindrical envelope made of a filtering material and provided with a bottom.
- the inlet space preferably extends substantially downward from the flow space, so that oil returning into the inlet space after circulating through the air lock gets into a smooth rising flow, in which, before getting into the flow space, the oil stays long enough to permit the oil to stratify according to the impurities contained in it. In other words, air bubbles rise to the surface and are largely separated from the oil while heavier impurities remain in lower strata in the flow. In this way, a more efficient filter operation is achieved.
- the top of the flow space is preferably provided with a cover which covers the flow space and is provided with a port for an oil flow inlet pipe and a door for filter maintenance and/or filter change.
- the flow space also preferably comprises an overflow aperture through which the oil flow is passed directly into the oil tank if the filters do not pass a sufficient flow of return oil through them.
- the overflow aperture may [ pass the oil ] through a maintenance opening outside the flow space comprised in the cover.
- the flow space and/or its cover are/is preferably mounted on the edge of an opening in the top of the oil tank or on a collar attached to or mounted on the edge.
- the whole unit can be raised and lowered directly in a vertical direction into the desired opening, so the prefiltration unit can be installed in any new oil tank or in any oil tank already in use, only by making the required opening in the top of the oil tank.
- the prefiltration unit of the invention has significant advantages.
- the invention can be constructed as a modular cassette, so it can be very easily installed in existing oil tanks as well.
- the unit can also be lifted off e.g. when the oil tank is to be cleaned.
- the unit makes the oil flow before the oil tank significantly smoother, which means that air and gas will be more effectively separated in the oil tank, too.
- the unit ensures that no oil is allowed to splash or flow out into the environ- ment during use or in different maintenance situations.
- the prefiltration unit of the invention also allows different kinds of treatment of oils of different degrees of purity before they are passed back into the oil tank as the unit can be provided with several inlet spaces from which the oil flows can be directed to different filters, and the oil flow already smoothed and partly stratified in the inlet space can be divided in the flow space and passed to different filters .
- Fig. 1 presents a diagram representing a prefiltration unit according to invention, installed in con- junction with an oil tank,
- Fig. 2 presents a top view of the prefiltration unit in Fig. 1 without a cover
- Fig. 3 presents a top view of the prefiltration unit in Fig. 1 with a cover.
- the prefiltration unit of the invention in the oil circulating lubrication system presented in the drawing consists of a module or cassette placed in an opening 4 made in the top 3 of an oil tank 1.
- This module is mounted hanging from a collar 14 attached to the edges of the tank top.
- the module comprises a boxlike case 15 provided with a straight and flat bottom, said case extending downward from the collar 14 and forming a flow space 5.
- Extending downward from the bottom of the flow space is an inlet space 7 provided with an air lock 6, i.e. with a suitable dividing wall, into which space the oil to be purified is supplied via an oil supply pipe 8 extending into the inlet space.
- an air lock 6 i.e. with a suitable dividing wall
- an oil supply pipe 8 extending into the inlet space.
- Also extending downward from the bottom of the flow space 5 in this embodiment are four cylindrical filters 2 whose sides and bottom consist of a relatively fine cribrose structure with a sieve opening of the order of e.g. 50 ⁇ m.
- the flow space 5 is provided with an overflow aperture 12 located at the other edge of the flow space 5, in its upper part, to allow the oil to flow directly down into the oil tank 1 if the filters 2 do not pass enough oil through them.
- the flow space 5 is provided with a cover 9 completely covering it.
- This cover is provided with two ports 10 for oil supply pipes 8.
- the cover 9 is provided with a door 11 placed directly above the filters 2 to allow filter maintenance and inspection as well as filter change.
- a maintenance door 13 placed outside the flow space 5 in the cover 9 is a maintenance door 13, which makes it possible to carry out filter maintenance and to check the operation of the filters 2 from outside, also allowing maintenance of the oil tank 1 as a whole. Any oil flowing through the overflow aperture 12 will pass via this same maintenance opening into the oil tank 1.
- the prefiltration unit of the invention works as follows. When the oil to be purified flowing from the supply pipe 8 reaches the inlet space 7, the flow becomes smooth and steady, and the air contained in it already begins to be separated.
- the oil flows through the air lock 6, which prevents any humid air in the return piping from getting into the oil tank and into contact with the oil flow to be purified. From the air lock in the inlet space, the oil rises smoothly into the flow space 5, in other words, the oil cannot get directly from the inlet space 7 into the oil tank 1 or even into the filters 2. This ensures that the flow is smooth and free of turbulence and that efficient prefiltration is achieved.
- the oil flows into the spaces formed by the filters 2, which are located substantially above the oil surface 16 in the tank. Coarse impurities are removed from the oil as it passes through the filters into the oil tank, so the oil is ready to be recirculated into the lubrication system. If the system is switched off, then all the oil will return into the tank 1 and the oil surface 17 will rise, covering the filters 2. However, this will not affect the operation or filtering efficiency of the system.
- the overflow aperture 12 in the upper part of the flow space wall will let the oil flow into the oil tank 1 without purification, ensuring that no oil can escape from the system.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99929351A EP1091793A1 (en) | 1998-06-01 | 1999-05-31 | Prefiltration unit |
AU46188/99A AU4618899A (en) | 1998-06-01 | 1999-05-31 | Prefiltration unit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FIU980274 | 1998-06-01 | ||
FI980274U FI3649U1 (en) | 1998-06-01 | 1998-06-01 | Esisuodatusyksikkö |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999062615A1 true WO1999062615A1 (en) | 1999-12-09 |
Family
ID=8550746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1999/000470 WO1999062615A1 (en) | 1998-06-01 | 1999-05-31 | Prefiltration unit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1091793A1 (en) |
AU (1) | AU4618899A (en) |
FI (1) | FI3649U1 (en) |
WO (1) | WO1999062615A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017096736A1 (en) * | 2015-12-10 | 2017-06-15 | 国家海洋局第三海洋研究所 | Apparatus for aqueous chemical precipitation reaction and quick filtration |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0096670A1 (en) * | 1982-06-04 | 1983-12-21 | Leif Ernryd Ab | Apparatus for separating solid particles from a liquid |
EP0347872A1 (en) * | 1988-06-24 | 1989-12-27 | ARGO G.M.B.H. für Feinmechanik | Ventilating device for an oil tank preferably made of plastics |
US5085677A (en) * | 1990-03-28 | 1992-02-04 | Societe Anonyme Dite Hispano-Suiza | Oil deaerator device |
-
1998
- 1998-06-01 FI FI980274U patent/FI3649U1/en active
-
1999
- 1999-05-31 AU AU46188/99A patent/AU4618899A/en not_active Abandoned
- 1999-05-31 EP EP99929351A patent/EP1091793A1/en not_active Withdrawn
- 1999-05-31 WO PCT/FI1999/000470 patent/WO1999062615A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0096670A1 (en) * | 1982-06-04 | 1983-12-21 | Leif Ernryd Ab | Apparatus for separating solid particles from a liquid |
EP0347872A1 (en) * | 1988-06-24 | 1989-12-27 | ARGO G.M.B.H. für Feinmechanik | Ventilating device for an oil tank preferably made of plastics |
US5085677A (en) * | 1990-03-28 | 1992-02-04 | Societe Anonyme Dite Hispano-Suiza | Oil deaerator device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017096736A1 (en) * | 2015-12-10 | 2017-06-15 | 国家海洋局第三海洋研究所 | Apparatus for aqueous chemical precipitation reaction and quick filtration |
US10626022B2 (en) | 2015-12-10 | 2020-04-21 | Third Institute Of Oceanography, State Oceanic Administration | Integrated apparatus for chemical precipitation and rapid filtration of water samples |
Also Published As
Publication number | Publication date |
---|---|
FIU980274U0 (en) | 1998-06-01 |
EP1091793A1 (en) | 2001-04-18 |
FI3649U1 (en) | 1998-10-09 |
AU4618899A (en) | 1999-12-20 |
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