WO2010039083A1 - Device for separation of a lighter liquid phase from a heavier processing liquid, a plant for cleaning a recirculating processing liquid by means of the separation device, and a method for separating a lighter liquid phase from a heavier processing liquid phase - Google Patents
Device for separation of a lighter liquid phase from a heavier processing liquid, a plant for cleaning a recirculating processing liquid by means of the separation device, and a method for separating a lighter liquid phase from a heavier processing liquid phase Download PDFInfo
- Publication number
- WO2010039083A1 WO2010039083A1 PCT/SE2009/050457 SE2009050457W WO2010039083A1 WO 2010039083 A1 WO2010039083 A1 WO 2010039083A1 SE 2009050457 W SE2009050457 W SE 2009050457W WO 2010039083 A1 WO2010039083 A1 WO 2010039083A1
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- WIPO (PCT)
- Prior art keywords
- processing liquid
- tank
- liquid
- separation
- collection container
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
Definitions
- the invention relates primarily to a device for separating a lighter liquid phase, preferably leaked oil, from a heavier liquid phase, preferably a processing liquid, such as a cutting fluid, in accordance with the preamble to claim 1.
- Cutting fluids are used for example to cool and lubricate cutting machine tools and often consist of an emulsion of water and oil.
- the cutting fluid is recirculated to a cutting fluid tank, it is often polluted with leaked oil from various components of the machine tool, which require lubrication.
- leaked oil is accumulated in the cutting fluid and in time creates, among other things, hygiene problems and quality problems in machining.
- the leaked oil thus promotes the growth of bacteria and reduces cooling capacity, as well as soiling tools and finished products. This requires regular fluid changes involving production down-time, increased environmental burden through waste incineration, and increased production cost.
- One alternative to frequent fluid changes is to clean the fluid from leaked oil to thereby extend the interval between fluid changes.
- Known equipment for cleaning cutting fluid includes for example band skimmers and mobile separators.
- the disadvantage of the known equipment is, inter alia, that they require extensive manual maintenance and large capital investment in the central cutting fluid system, which must supply a number of machine tools.
- the separation device comprises
- a separation tank which is divided by an intermediate wall into, firstly, a separation chamber provided with an inlet, in which separation chamber there is placed a removable oil collection container with an upper inlet for the processing liquid flowing into the separation chamber and with a closed bottom, and secondly, an outlet chamber, to which cleaned processing liquid from the oil collection chamber can flow via a communication opening at the bottom of the separation tank via a liquid trap;
- the liquid trap comprising firstly a substantially vertical outer pipe extending into the oil collection container and having a lower open end spaced from the bottom of the oil collection container and with an upper end which extends at least up to the upper portion of the oil collection container, and secondly an inner trap pipe which extends inside the outer pipe and substantially parallel therewith, and has an open upper inlet end and an open lower outlet end, which extends in a sealed manner through the oil collection container, the opening of the upper inlet end of the inner liquid trap pipe being disposed at a level below the normal liquid level in the oil collection container, and
- a pump arranged in the outlet chamber in the separation tank to pump clean processing liquid from the outlet chamber to a processing liquid tank and at the same time creating a liquid level in the cleaned processing liquid in the outlet chamber, which is lower than the liquid level in the processing liquid tank and lower than the opening of the upper inlet end of the inner liquid trap pipe.
- the leaked oil can be collected in an oil collection container and, at appropriate intervals, be emptied by lifting the container out of the first chamber of the separation tank and pouring the oil out into an external sump or the like.
- the outer pipe is permanently fixed in the oil collection container and extends up from the upper portion of the oil collection container and has a gripping handle for lifting up the oil collection container from the separation chamber for emptying the oil out of the container.
- its inlet has a funnel configuration, and a strainer can be placed above the inlet of the oil collection container to catch larger polluting particles in the processing liquid.
- a separation device is mounted stationary in the upper portion of the processing liquid tank, but, alternatively, it can be installed floating in the processing liquid in the processing liquid tank to follow the processing liquid level changes.
- the separation tank can be coupled to buoyant bodies (pontoons) which can be vertically displaceably guided in the processing liquid tank by means of suitable guides.
- the separation device can also be arranged to stand free outside the processing liquid tank.
- an oil separating coalescing element can be placed in the oil collection container upstream of the lower, open end of the outer pipe to improve collection of leaked oil.
- the invention further relates to a plant for cleaning, with the aid of a separating device according to the invention, a recirculating processing liquid, which is to be fed to at least one working machine, said plant comprising a separation device according to one of claims 1 to 11, which can be immersed in processing liquid in a processing liquid tank, there being in the processing liquid tank at least one outlet pump for pumping processing liquid to the working machine, and an inlet for polluted processing liquid from the working machine or machines.
- the invention also relates to a method for separating a lighter liquid phase, preferably leaked oil, from a heavier liquid phase, preferably processing liquid, such as a cutting fluid. That which particularly characterizes the method is disclosed in the independent claiml3, said method comprising the steps of:
- Fig. 1 is a side view of a processing liquid cleaning plant, including the separation device according to the invention
- Fig. 2 is a schematic perspective view of the separation device according to the invention.
- Fig. 3 is a schematic side view of an oil collection container in the separation device of Figs. 1 and 2, with associated liquid trap;
- Fig. 4 is a plan view of the container in Fig. 3;
- Fig. 5 is a schematic perspective view of a separation device according to the invention in an embodiment with floating suspension in the processing liquid tank;
- Fig. 6 is a side view of the embodiment in Fig. 5.
- 10 generally designates a processing liquid cleaning plant with a separation device according to the present invention.
- the plant 10 comprises a tank 12 which contains a processing liquid 14, for example a cutting fluid in form of a water/oil emulsion for cooling and lubricating one or more machines 16 for cutting machining of workpieces.
- the processing liquid can also consist of a cleaning fluid, which can be used to clean machined workpieces or the like.
- the cutting fluid 14 in the tank 12 is fed to the machines 16 with the aid of a pump 18 driven by an electric motor and is and is returned to the tank 12 via a return line 20.
- a pump 18 driven by an electric motor
- is and is returned to the tank 12 via a return line 20 During the use of the cutting fluid in the machines 16 it is polluted to a certain degree by leaking lubricant from the various components of the machines.
- This leaked oil is accumulated as a lighter liquid phase in the cutting fluid and in time can create inter alia hygienic and quality problems for machining. Such leaked oil can increase bacteria growth and reduce the cooling capacity as well as dirtying the tools and the finished products. In the tank 12 the leaked oil is spread as a thin surface layer a few tenth of a millimeter thick on the heavier emulsion phase.
- the separation device 22 comprises a separation tank 24 provided with an inlet 36.
- the tank can be mounted stationary in an upper portion of the cutting fluid tank 12 and extend down into the cutting fluid therein.
- the separation tank 24 has a closed bottom 26 and is divided by means of a substantially vertical intermediate wall 28 into a separation chamber 30 and an outlet chamber 32 for cleaned cutting fluid.
- the separation chamber 30 communicates with the outlet chamber 32 via a free space 34 under the intermediate wall 28.
- the inlet opening(s) 36 of the separation tank 24 have portions lying under the liquid level 38 in the cutting fluid tank 12 to permit a surface layer of the cutting fluid 14 to flow down into an oil collection container 40 placed in the separation chamber 30.
- the oil collection container 40 has an upper, funnel-shaped inlet 42 to receive the cutting fluid flowing down with its lighter leaked oil phase.
- the inlet 42 can have a strainer 44 (Figs. 2 — 4) placed thereover to catch particles in the liquid.
- the oil collection container 40 has a bottom 45 and is permanently integrated with a liquid trap, which comprises a substantially vertically orientated outer pipe 46 with a lower, open end 48, spaced from the bottom 26 of the separation tank 24, and with an upper end, which extends up above the separation tank 24 and there has a handle 50 to permit the oil collection container 40 to be lifted up simply out of the separation chamber 30 in the tank 24 in order to empty out the collected oil in the oil collection container 40.
- a liquid trap which comprises a substantially vertically orientated outer pipe 46 with a lower, open end 48, spaced from the bottom 26 of the separation tank 24, and with an upper end, which extends up above the separation tank 24 and there has a handle 50 to permit the oil collection container 40 to be lifted up simply out of the separation chamber 30 in the tank 24 in order to empty out the collected oil in the oil collection container 40.
- the liquid trap further comprises an inner liquid trap pipe 52 which extends inside the outer pipe 46, essentially parallel and coaxial therewith. It has an open upper inlet end 54 and an open lower outlet end 56, the latter extending in a sealed manner through the bottom or through an adjacent side wall of the oil collection container 40, the opening of the upper inlet end 54 of the inner liquid trap pipe 52 being at a level below the normal liquid level 58 in the oil collection container 40.
- a liquid pump 60 In the outlet chamber 32 of the separation tank 24 there is a liquid pump 60, which can be operated continuously to pump the cleaned cutting fluid phase flowing via the liquid trap 46, 52 to the outlet chamber 32, to the processing liquid tank 12.
- Figs. 5 and 6 show an embodiment where the separation device 22, instead of being permanently mounted on or in the cutting fluid tank 12, is equipped with buoyant bodies or pontoons 66 on the sides of the separation tank 24 to make it possible for the separation device 22 to follow the surface level changes in the cutting fluid 14 in the tank 12.
- the separation device 22 is guided vertically in tank 12 with the aid of vertical guide elements 68.
- a brace 70 holding the pontoons 66 together on either side of the separation device 22 can abut against the edges of the guide elements 68 to guide the entire separation device 22 linearly vertically.
- the separation device 22 is supported at 72 on the braces 70 and thus follows the movements of the pontoons 66 and thus the liquid level changes in the processing liquid tank 12. It is also possible to arrange the separation device 22 to be free outside the processing liquid tank 12. In this embodiment, the processing liquid is led between the separation device 22 and the processing liquid tank 12 via hoses or pipes (not shown).
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Removal Of Floating Material (AREA)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
Abstract
The invention relates to a device (22) for separating a lighter liquid phase from a heavier liquid phase, preferably a processing liquid in a processing liquid tank (12), and comprises a separation tank (24) with firstly a separation chamber (30), in which there is placed a removably mounted oil collection container (40) with a closed bottom (45), and secondly an outlet chamber (32), to which cleaned processing liquid from the oil collection chamber (40) can flow via a communication opening (34) at the bottom of the separation tank (24) via a liquid trap (46, 52), and a pump arranged in the outlet chamber (32) in the separation tank (24) to pump cleaned processing liquid from the outlet chamber (32) to the processing liquid tank and at the same time creating a liquid level (62) in the cleaned processing liquid in the outlet chamber (32) which is lower than the liquid level (38) in the processing liquid tank (12) and lower than an upper inlet opening of a pipe (52) of the liquid trap. The invention also relates to a plant and a method for cleaning recirculating processing liquid, which is to be fed to at least one working machine (16), including the separation device (22) according to the invention.
Description
Device for separation of a lighter liquid phase from a heavier processing liquid, a plant for cleaning a recirculating processing liquid by means of the separation device, and a method for separating a lighter liquid phase from a heavier processing liquid phase
Background of the invention
The invention relates primarily to a device for separating a lighter liquid phase, preferably leaked oil, from a heavier liquid phase, preferably a processing liquid, such as a cutting fluid, in accordance with the preamble to claim 1.
Background art
It is for example known in the mechanical machining industry to use various systems to recirculate processing liquids, such as cutting and cleaning fluids. Cutting fluids are used for example to cool and lubricate cutting machine tools and often consist of an emulsion of water and oil. When the cutting fluid is recirculated to a cutting fluid tank, it is often polluted with leaked oil from various components of the machine tool, which require lubrication. Such leaking lubricant is accumulated in the cutting fluid and in time creates, among other things, hygiene problems and quality problems in machining. The leaked oil thus promotes the growth of bacteria and reduces cooling capacity, as well as soiling tools and finished products. This requires regular fluid changes involving production down-time, increased environmental burden through waste incineration, and increased production cost.
One alternative to frequent fluid changes is to clean the fluid from leaked oil to thereby extend the interval between fluid changes. Known equipment for cleaning cutting fluid includes for example band skimmers and mobile
separators. The disadvantage of the known equipment is, inter alia, that they require extensive manual maintenance and large capital investment in the central cutting fluid system, which must supply a number of machine tools.
Summary of the invention
One purpose of the invention is to remove these and other disadvantages of previously known systems for cleaning processing liquids and to suggest a device which can operate continuously in a more effective manner to collect and concentrate the lighter leaked oil phase in the cutting fluid which floats on the surface in a processing liquid tank. For this purpose, the device described by way of introduction of the invention is characterized by the features disclosed in claim 1. Thus, the separation device comprises
- a separation tank, which is divided by an intermediate wall into, firstly, a separation chamber provided with an inlet, in which separation chamber there is placed a removable oil collection container with an upper inlet for the processing liquid flowing into the separation chamber and with a closed bottom, and secondly, an outlet chamber, to which cleaned processing liquid from the oil collection chamber can flow via a communication opening at the bottom of the separation tank via a liquid trap;
- the liquid trap comprising firstly a substantially vertical outer pipe extending into the oil collection container and having a lower open end spaced from the bottom of the oil collection container and with an upper end which extends at least up to the upper portion of the oil collection container, and secondly an inner trap pipe which extends inside the outer pipe and substantially parallel therewith, and has an open upper inlet end and an open lower outlet end, which extends in a sealed manner through the oil collection container, the opening of the upper inlet end of the
inner liquid trap pipe being disposed at a level below the normal liquid level in the oil collection container, and
- a pump arranged in the outlet chamber in the separation tank to pump clean processing liquid from the outlet chamber to a processing liquid tank and at the same time creating a liquid level in the cleaned processing liquid in the outlet chamber, which is lower than the liquid level in the processing liquid tank and lower than the opening of the upper inlet end of the inner liquid trap pipe.
Thus the leaked oil can be collected in an oil collection container and, at appropriate intervals, be emptied by lifting the container out of the first chamber of the separation tank and pouring the oil out into an external sump or the like.
Suitably the outer pipe is permanently fixed in the oil collection container and extends up from the upper portion of the oil collection container and has a gripping handle for lifting up the oil collection container from the separation chamber for emptying the oil out of the container.
In order to facilitate the flow of leaked oil into the oil collection container, its inlet has a funnel configuration, and a strainer can be placed above the inlet of the oil collection container to catch larger polluting particles in the processing liquid.
Preferably a separation device is mounted stationary in the upper portion of the processing liquid tank, but, alternatively, it can be installed floating in the processing liquid in the processing liquid tank to follow the processing liquid level changes. For this purpose, the separation tank can be coupled to buoyant bodies (pontoons) which can be vertically displaceably guided in the
processing liquid tank by means of suitable guides. The separation device can also be arranged to stand free outside the processing liquid tank.
Suitably, an oil separating coalescing element can be placed in the oil collection container upstream of the lower, open end of the outer pipe to improve collection of leaked oil.
According to independent claim 12, the invention further relates to a plant for cleaning, with the aid of a separating device according to the invention, a recirculating processing liquid, which is to be fed to at least one working machine, said plant comprising a separation device according to one of claims 1 to 11, which can be immersed in processing liquid in a processing liquid tank, there being in the processing liquid tank at least one outlet pump for pumping processing liquid to the working machine, and an inlet for polluted processing liquid from the working machine or machines.
The invention also relates to a method for separating a lighter liquid phase, preferably leaked oil, from a heavier liquid phase, preferably processing liquid, such as a cutting fluid. That which particularly characterizes the method is disclosed in the independent claiml3, said method comprising the steps of:
- removing a surface layer of the processing liquid containing the leaked oil in a processing liquid tank to conduct it down into an oil collection container, which is placed in a first chamber of a separation tank, - lowering the liquid level in the second chamber of the separation tank, which communicates at the bottom with the oil collection container via a liquid trap to create a lower level of the cleaned liquid in the second chamber than the liquid level in the processing liquid tank, this lowering
- being achieved by pumping of the cleaned processing liquid in the second chamber to the processing liquid tank.
Additional advantages and characteristics of the invention will become evident in more detail below in the following detailed description with reference to examples shown in the accompanying drawings.
Short description of the drawings
Fig. 1 is a side view of a processing liquid cleaning plant, including the separation device according to the invention;
Fig. 2 is a schematic perspective view of the separation device according to the invention;
Fig. 3 is a schematic side view of an oil collection container in the separation device of Figs. 1 and 2, with associated liquid trap;
Fig. 4 is a plan view of the container in Fig. 3;
Fig. 5 is a schematic perspective view of a separation device according to the invention in an embodiment with floating suspension in the processing liquid tank; and
Fig. 6 is a side view of the embodiment in Fig. 5.
Description of preferred embodiments of the invention
In Fig. 1, 10 generally designates a processing liquid cleaning plant with a separation device according to the present invention. The plant 10 comprises a
tank 12 which contains a processing liquid 14, for example a cutting fluid in form of a water/oil emulsion for cooling and lubricating one or more machines 16 for cutting machining of workpieces. The processing liquid can also consist of a cleaning fluid, which can be used to clean machined workpieces or the like. The cutting fluid 14 in the tank 12 is fed to the machines 16 with the aid of a pump 18 driven by an electric motor and is and is returned to the tank 12 via a return line 20. During the use of the cutting fluid in the machines 16 it is polluted to a certain degree by leaking lubricant from the various components of the machines. This leaked oil is accumulated as a lighter liquid phase in the cutting fluid and in time can create inter alia hygienic and quality problems for machining. Such leaked oil can increase bacteria growth and reduce the cooling capacity as well as dirtying the tools and the finished products. In the tank 12 the leaked oil is spread as a thin surface layer a few tenth of a millimeter thick on the heavier emulsion phase.
According to the invention there is suggested now a separation device 22, which can continuously collect, in a simple and effective manner, this leaked oil layer and thus clean the cutting fluid in the tank 12, so that the interval for cutting fluid change therein can be extended substantially. The separation device 22 comprises a separation tank 24 provided with an inlet 36. The tank can be mounted stationary in an upper portion of the cutting fluid tank 12 and extend down into the cutting fluid therein. The separation tank 24 has a closed bottom 26 and is divided by means of a substantially vertical intermediate wall 28 into a separation chamber 30 and an outlet chamber 32 for cleaned cutting fluid. The separation chamber 30 communicates with the outlet chamber 32 via a free space 34 under the intermediate wall 28. The inlet opening(s) 36 of the separation tank 24 have portions lying under the liquid level 38 in the cutting fluid tank 12 to permit a surface layer of the cutting fluid 14 to flow down into an oil collection container 40 placed in the separation chamber 30. The oil collection container 40 has an upper, funnel-shaped inlet 42 to receive
the cutting fluid flowing down with its lighter leaked oil phase. The inlet 42 can have a strainer 44 (Figs. 2 — 4) placed thereover to catch particles in the liquid. The oil collection container 40 has a bottom 45 and is permanently integrated with a liquid trap, which comprises a substantially vertically orientated outer pipe 46 with a lower, open end 48, spaced from the bottom 26 of the separation tank 24, and with an upper end, which extends up above the separation tank 24 and there has a handle 50 to permit the oil collection container 40 to be lifted up simply out of the separation chamber 30 in the tank 24 in order to empty out the collected oil in the oil collection container 40.
The liquid trap further comprises an inner liquid trap pipe 52 which extends inside the outer pipe 46, essentially parallel and coaxial therewith. It has an open upper inlet end 54 and an open lower outlet end 56, the latter extending in a sealed manner through the bottom or through an adjacent side wall of the oil collection container 40, the opening of the upper inlet end 54 of the inner liquid trap pipe 52 being at a level below the normal liquid level 58 in the oil collection container 40. In the outlet chamber 32 of the separation tank 24 there is a liquid pump 60, which can be operated continuously to pump the cleaned cutting fluid phase flowing via the liquid trap 46, 52 to the outlet chamber 32, to the processing liquid tank 12. This also keeps the liquid level 62 in the outlet chamber 32 lower than the liquid level 38 in the processing liquid tank 12 and lower than the level for the upper inlet end 54 of the inner liquid trap pipe 52. The liquid trap 46, 52 prevents the lighter leaked oil phase from flowing over to the outlet chamber 32 of the tank 24. The oil, which has come into the oil collection container 40, is collected therein and can when the container 40 has been largely filled, be emptied by being lifted up with the aid of the outer pipe 46 and its handle 50. A coalescing element 64 can also be placed in the oil collection container 40 upstream of the lower open end 48 of
the outer pipe 46 to improve separation of the collected oil in the oil collection container 40.
Figs. 5 and 6 show an embodiment where the separation device 22, instead of being permanently mounted on or in the cutting fluid tank 12, is equipped with buoyant bodies or pontoons 66 on the sides of the separation tank 24 to make it possible for the separation device 22 to follow the surface level changes in the cutting fluid 14 in the tank 12. For this purpose, the separation device 22 is guided vertically in tank 12 with the aid of vertical guide elements 68. A brace 70 holding the pontoons 66 together on either side of the separation device 22 can abut against the edges of the guide elements 68 to guide the entire separation device 22 linearly vertically. The separation device 22 is supported at 72 on the braces 70 and thus follows the movements of the pontoons 66 and thus the liquid level changes in the processing liquid tank 12. It is also possible to arrange the separation device 22 to be free outside the processing liquid tank 12. In this embodiment, the processing liquid is led between the separation device 22 and the processing liquid tank 12 via hoses or pipes (not shown).
Claims
1. Device for separating a lighter liquid phase, preferably leaked oil, from a heavier liquid phase, preferably a processing liquid, such as a cutting fluid, characterized in that it comprises:
- a separation tank (24), which is divided by an intermediate wall (28) into, firstly, a separation chamber (30) provided with an inlet (36), in which separation chamber there is placed a removable oil collection container (40) with an upper inlet (42) for the processing liquid flowing into the separation chamber
(30), and with a closed bottom (45), and secondly, an outlet chamber (32), to which cleaned processing liquid from the oil collection chamber (40) can flow via a communication opening (34) at the lower portion of the separation tank (24) via a liquid trap;
- the liquid trap comprising, firstly, a substantially vertical outer pipe (46) extending into the oil collection container (40) and having a lower open end (48) spaced from the bottom (45) of the oil collection container (40) and with an upper end which extends at least up to the upper portion of the oil collection container (40), and, secondly, an inner trap pipe (52), which extends inside the outer pipe (46) and substantially parallel therewith, and has an open upper inlet end (54) and an open lower outlet end (56), which extends in a sealed manner through the oil collection container (40), the opening of the upper inlet end (54) of the inner liquid trap pipe (52) being disposed at a level below the normal liquid level in the oil collection container (40), and a pump (60) arranged in the outlet chamber (32) in the separation tank (24) to pump clean processing liquid from the outlet chamber (32) to a processing liquid tank (12) and at the same time creating a liquid level (62) in the cleaned processing liquid in the outlet chamber (32), which is lower than the liquid level (38) in the processing liquid tank (12) and lower than the opening of the upper inlet end (54) of the inner liquid trap pipe
(52).
2. Device according to claim 1, characterized in that the device (22) is immersible in the processing liquid tank (12).
3. Device according to claim 1 or 2, characterized in that the outer pipe (46) is securedly fixed in the oil collection container (40).
4. Device according to one of claims 1 - 3, characterized in that the outer pipe (46) extends up from the upper portion of the oil collection container (40) and has a gripping handle (50) for lifting up the oil collection container (40) out of the separation chamber (30) for emptying the oil out of the container (40).
5. Device according to one of claims 1-4, characterized in that the inlet
(42) of the oil collection container (40) has a funnel-like configuration.
6. Device according to one of claims 1-5, characterized in that a strainer (44) is placed over the inlet (42) of the oil collection container (40).
7. Device according to one of claims 2-6, characterized in that the separation tank (24) is made to be mounted securedly on an upper portion of the processing liquid tank (40).
8. Device according to one of claims 2-6, v in that the separation tank (24) is constructed to be mounted floating in the processing liquid in the processing liquid tank 12 to follow the surface level changes of the processing liquid therein.
9. Device according to claim 8, characterized in that the separation tank (24) is coupled to a buoyant body (66) and is vertically displaceably guided in the processing liquid tank by means of guide element (68).
10. Device according to one of claims 1-6, characterized in that the separation tank (24) is made to be arranged free-standing, outside the processing liquid tank (12).
11. Device according to one of claims 2-6, characterized in that a coalescent element (64) is mounted in the oil collection container (40) upstream of the lower open end (48) of the upper pipe (46).
12. Plant for cleaning of recirculating processing liquid, which is to be fed to at least one working machine (16), comprising a separation device (22) immersible in a processing liquid in a processing liquid tank (12) according to one of claims 1-11, there being in the processing liquid tank (12) at least one outlet pump (18) for pumping the processing liquid to the working machine (16), and an inlet (20) for polluted processing liquid from the working machine.
13. Method of separating a lighter liquid phase, preferably leaked oil, from a heavier liquid phase, preferably a processing liquid, such as a cutting fluid, comprising the steps of:
- removing a surface layer of the processing liquid containing the leaked oil in a processing liquid tank (12) to conduct it down into an oil collection container (40), which is placed in a first chamber (30) of a separation tank (24), lowering the liquid level (62) in the second chamber (32) of the separation tank (24), which communicates at the bottom (34) with the oil collection container (40) via a liquid trap (46, 52) to create a lower level (62) of the cleaned liquid in the second chamber (32) than the liquid level (38) in the processing liquid tank (12), this lowering being achieved by pumping of the cleaned processing liquid in the second chamber (32) to the processing liquid tank (12).
14. Method according to claim 13, characterized in that the separation tank (24) is immersible in the processing liquid tank (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0802079A SE532974C2 (en) | 2008-10-02 | 2008-10-02 | Apparatus for separating a lighter liquid phase from a heavier process liquid phase, plant for purifying a recirculating process liquid by means of the separating device, and a method for separating a lighter liquid phase from a heavier process liquid phase |
| SE0802079-4 | 2008-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010039083A1 true WO2010039083A1 (en) | 2010-04-08 |
Family
ID=42073704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2009/050457 Ceased WO2010039083A1 (en) | 2008-10-02 | 2009-04-28 | Device for separation of a lighter liquid phase from a heavier processing liquid, a plant for cleaning a recirculating processing liquid by means of the separation device, and a method for separating a lighter liquid phase from a heavier processing liquid phase |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE532974C2 (en) |
| WO (1) | WO2010039083A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111871005A (en) * | 2020-07-14 | 2020-11-03 | 国家能源集团煤焦化有限责任公司 | Separation device for sulfolane and heat conduction oil |
| CN113856587A (en) * | 2021-09-08 | 2021-12-31 | 安徽广信农化股份有限公司 | Raw material circulating and screening equipment for indoxacarb production and screening method thereof |
| CN114043308A (en) * | 2021-11-12 | 2022-02-15 | 上海应用技术大学 | Biological cutting fluid circulation processing system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1508224A (en) * | 1974-04-26 | 1978-04-19 | Liquid Processing Syst Inc | Method for separating oil from a dispersion of oil in water |
| US20040159597A1 (en) * | 2003-02-14 | 2004-08-19 | Lee F. Donald | Portable purifying system |
-
2008
- 2008-10-02 SE SE0802079A patent/SE532974C2/en not_active IP Right Cessation
-
2009
- 2009-04-28 WO PCT/SE2009/050457 patent/WO2010039083A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1508224A (en) * | 1974-04-26 | 1978-04-19 | Liquid Processing Syst Inc | Method for separating oil from a dispersion of oil in water |
| US20040159597A1 (en) * | 2003-02-14 | 2004-08-19 | Lee F. Donald | Portable purifying system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111871005A (en) * | 2020-07-14 | 2020-11-03 | 国家能源集团煤焦化有限责任公司 | Separation device for sulfolane and heat conduction oil |
| CN111871005B (en) * | 2020-07-14 | 2022-03-01 | 国家能源集团煤焦化有限责任公司 | Separation device for sulfolane and heat conduction oil |
| CN113856587A (en) * | 2021-09-08 | 2021-12-31 | 安徽广信农化股份有限公司 | Raw material circulating and screening equipment for indoxacarb production and screening method thereof |
| CN114043308A (en) * | 2021-11-12 | 2022-02-15 | 上海应用技术大学 | Biological cutting fluid circulation processing system |
| CN114043308B (en) * | 2021-11-12 | 2023-08-08 | 上海应用技术大学 | Biological cutting fluid circulation processing system |
Also Published As
| Publication number | Publication date |
|---|---|
| SE532974C2 (en) | 2010-06-01 |
| SE0802079A1 (en) | 2010-04-03 |
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