EP2864050A1 - Device for separating out magnetizable impurities from flowing fluids - Google Patents
Device for separating out magnetizable impurities from flowing fluidsInfo
- Publication number
- EP2864050A1 EP2864050A1 EP12742812.6A EP12742812A EP2864050A1 EP 2864050 A1 EP2864050 A1 EP 2864050A1 EP 12742812 A EP12742812 A EP 12742812A EP 2864050 A1 EP2864050 A1 EP 2864050A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outlet
- fluid
- chamber
- inlet
- particles
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/284—Magnetic plugs and dipsticks with associated cleaning means, e.g. retractable non-magnetic sleeve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/286—Magnetic plugs and dipsticks disposed at the inner circumference of a recipient, e.g. magnetic drain bolt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/288—Magnetic plugs and dipsticks disposed at the outer circumference of a recipient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
Definitions
- the present invention relates to a device for separating from magnetizable impurities from flowing fluids (liquids and gases).
- Magnetic filters are used to remove magnetizable particles from fluids produced, for example, during manufacture (e.g., metal shavings during drilling and turning).
- the aim is to achieve the highest possible filter efficiency, in particular the removal of very small particles, in order to reduce the wear on machines and tools through which the fluids flow or come in contact with them.
- the filter efficiency gradually decreases and at worst, the filter clogs.
- the magnetic filter must therefore be cleaned at the shortest possible interruption period of the filtration operation at intervals.
- DE 1 160 130 A describes a device for the magnetic filtering of magnetically conductive particles from flowing media.
- a screw 2 is about an axis 3, 6 rotatably mounted on the wall deposited impurities on a thin surface and removed. Continuous cleaning is presented as a possible alternative.
- the liquid flows from top to bottom and centrifugal forces are generated during the passage of the flights, which are used for cleaning.
- the particle outlet and the outlet for the clean liquid are located below the polluted screw. There is a risk that contaminants get into the cleaned liquid.
- the polarity of the magnets is ineffective, since the largest magnetic forces are always present at the poles of the magnet, see below.
- the liquid flows through a rotating hollow shaft 6 and through the holes in the tube, wherein the tangential exit from the hollow axis supports the cleaning action, and in this case, the impurities are removed by turning the screw up and transported to the poles, where the magnetic forces are greatest. Due to the design, the magnetizable particles can only be pushed away by pushed-on impurities. Depending on the property of the magnetizable particles, there is a blockage between the cover plate and the magnet.
- a magnetic filter device known from DE 1 794 280 B comprises a cylindrical housing 1 with an inlet opening 2 and an outlet opening 3.
- a rotatable magnetic filter column with magnets 5, 6 is arranged concentrically on a non-magnetic shaft 7.
- a cylindrical, non-magnetic jacket shell 9 Between the inlet 2 and the magnetic filter column is a cylindrical, non-magnetic jacket shell 9, which in the exemplary embodiment of FIG. 4 has screw vanes 16.
- In the entry area (Einschwemmstelle 13) is a catch or squeegee strip 14 which strips off the impurities deposited on this rotation of the magnetic column. The cleaning of the magnetic filter from the adhered magnetic impurities may occur during normal filter operation be performed. It can also be provided a periodically operating rotary drive.
- a magnetic separator for removing magnetizable metal parts from a paper fiber suspension comprises a cylindrically shaped magnet 1, which is driven by a drive shaft 6. A part is surrounded by a coaxial tube 7, in which a coil enclosing the magnet helix is as winninglement 2.
- a coil enclosing the magnet helix is as winninglement 2.
- the constellation rotating magnet and stationary conveying element and the magnet can be stationary and the conveying element rotates.
- the relative movement generates an axial conveying movement, as a result of which the particles held in place by means of the magnet are conveyed out.
- the delivery may be continuous or at intervals. Coarser ferromagnetic particles are deposited in this magnetic separator.
- the filtrate does not flow through the screw flights and the separation process takes place only outside the tube 7 but not inside it.
- the ferromagnetic particles are transported together with a proportion of paper fibers to the discharge or the lock 4 and the magnet has only promotional function here.
- the fiber content can be backwashed through the purge port 13.
- the invention has for its object to provide a device for Depositing magnetizable contaminants from flowing fluids (liquids and gases) that is energy efficient, can handle large amounts of contaminants, and can be cleaned with minimal disruption of fluid flow.
- the invention thus relates to a device for separating magnetizable impurities from flowing fluids
- a cylindrical chamber having an inlet for the magnetizable particle-containing fluid (fluid inlet), an outlet for the purified fluid (clean fluid outlet), and an outlet for the magnetizable particles (particle outlet).
- an inner cylinder body is arranged, which forms an annular gap through which the fluid flows through the chamber wall.
- a drain valve is provided. Outside the annular gap at least one magnet is arranged in the flow direction between the fluid inlet and the clean fluid outlet.
- a rotatable, helical scraper which transports deposited on the wall of the chamber and / or the inner tube magnetizable particles to the particle outlet. A drive for the helical scraper during the period of the filter cleaning is provided.
- the device according to the invention for separating magnetizable impurities, in particular ferromagnetic particles, from fluids is distinguished by a very simple construction. It filters the magnetizable particles from flowing liquids or gases, whereby the flow is effected by negative pressure or overpressure.
- the liquid may be, for example, emulsions, cutting oils and the like and, in the case of the particles, iron or steel ferromagnetic particles.
- other liquids may also be purified and the particles may also be paramagnetic.
- the device according to the invention is also suitable for cleaning gases of magnetizable particles and, for example, metallurgical dust can be removed from the air. It can be deposited particles with dimensions of less than 10 ⁇ .
- the magnetic filter according to the invention is thus characterized by the property of being self-cleaning. Its operation is as follows: The annular gap is flowed through during normal operation of the liquid to be cleaned (or gas). In the annular gap is the helical guide means for the liquid, whereby the liquid is subjected to a centrifugal force and strives towards the outer wall.
- the helical guide means is rotatable for cleaning and scrapes adhered solid particles (sludge) from the outer wall during the period of cleaning.
- the helical guide device is not driven.
- the cleaning process is depressurised, which means that no pressure has to be built up separately. Rather, it is optionally backwashed or used the existing pressure, which will be described later.
- the magnets can be permanent magnets or electromagnets.
- the magnet (s) are (are) mounted externally on the cylindrical chamber.
- the effective area for collecting the magnetizable particles is larger.
- the magnets can be replaced during operation or others can be attached.
- the helical scraper can then be attached to the inner cylinder body, for example, be welded to this, in which case the inner cylinder body is made rotatable.
- magnets can be provided within the annular gap, for example, in order to increase the forces acting on the magnetizable particles and thus the filter efficiency.
- the helical scraper is always rotatable in this case, regardless of the chamber wall and the inner cylinder body and thus has a separate drive.
- the fluid Due to the helical wiper in the annular gap, the fluid is guided spirally through the annular gap.
- the centrifugal forces acting on the magnetizable particles during the passage of the screw helix assist the movement of the particles outwards to the chamber wall in externally mounted magnets. If the pitch of the helix is chosen flat, the flow resistance increases. At the same time, the magnetizable particles remain longer in the magnetic field and are more efficiently eliminated from the fluid due to the greater residence time.
- Another parameter with which the filter function can be controlled is the gap width, which also influences the flow velocity.
- the deposition behavior can be controlled in terms of particle size. If larger particles are to be separated, the flow rate is increased, and vice versa.
- Other parameters that are included in the cleaning behavior are the flow rate of the inflowing fluid, its viscosity and the strength of the magnets or magnetic fields used.
- the particle outlet is expediently provided in the region of the chamber in which the fluid inlet is located.
- the clean fluid is thus removed in the opposite direction to the discharged magnetizable particles. By means of this measure, less dirt particles remain in the filtrate.
- the magnetizable particles of the particle outlet is funnel-shaped or cylindrical.
- the drain valve By opening the drain valve, the magnetizable particles scraped off by the scraper and transported to the particle outlet can be purged or cleaned with the aid of the overpressure present in the system.
- the clean fluid outlet is equipped with an automatic valve. When this valve is closed, all the fluid can be forced through the particulate outlet by the existing positive pressure to reliably remove the contaminants from the chamber in critical cases.
- the inlet valve is closed. Due to the overpressure in the system then the liquid is discharged together with the impurities through the particle outlet.
- Switching means is then provided for switching from one fluid inlet of one magnetic filter to the fluid inlet of the other magnetic filter (e.g., a three-way valve) and / or opening and closing the associated clean fluid outlets. If the magnetic filter in operation needs to be cleaned, it switches to the other magnetic filter. The cleaning process does not interrupt the operation of the entire system or reduce the fluid pressure.
- Apparatus in which the ejected particles are separated from the fluid may be used in the cylindrical particle outlet design. This is provided downstream of the particle outlet or downstream thereof with a switch or a corresponding additional device with which the particle outlet is switched to a discharge of fluid and solids.
- the liquid present in the chamber is first of all drained off.
- the drain valve is opened and the inlet valve and the valve at the clean fluid outlet are closed.
- the helical scraper is driven and removes the adhering to the wall dirt particles.
- the wet solids virtually the dry substance, exit the chamber through the particle outlet and can be removed via a conduit or collected in a receiver.
- a switch for example, can be used to discharge the solids into the catch tank and the liquid discharged from the chamber via a separate line. At high sludge concentration (particle content in the fluid) no separation of fluid and solids should be made, but rather both should be removed together to avoid blockages.
- the clean fluid is discharged into a tank. In this case, then there is no back pressure on the chamber on the clean fluid side.
- Fig. 1 is a schematic view of a magnetic filter according to a first embodiment of the invention with angeordetem outside of the annular gap magnet and
- Fig. 2 is a schematic view of a magnetic filter according to a second embodiment of the invention with arranged outside and inside the annular gap magnet.
- FIG. 1 is a magnetic filter for separating ferromagnetic impurities from liquids such as emulsions or cutting oils.
- the magnetic filter is installed in a system in which the liquid is conveyed with overpressure, as prevails, for example, in pumping systems.
- the magnetic filter comprises a cylindrical chamber 2, which is shown in vertical positioning. An example, horizontal arrangement of the chamber is also possible.
- the chamber wall is made of non-ferromagnetic material, preferably stainless steel or plastic.
- the inner cylinder body In the chamber 2 is an inner cylinder body 4, which is coupled via a pivot pin 6 with a motor 8.
- the inner cylinder body may be solid or hollow inside.
- the inner tube 1 it is hollow inside and is referred to below as the inner tube.
- a scraper 10 Externally on the inner tube 4, a scraper 10, a Schneckenplanetaryl, attached, which extends almost to the wall of the chamber 2.
- the inner tube 4 extends over almost the entire length of the chamber 2 and ends at a distance in front of the motor 8 opposite, i. the lower in Fig. 1 end.
- the inner tube 4 and the wall of the chamber 2 define an annular gap 12.
- a magnet 14 is arranged, whose magnetic field penetrates the annular gap 12.
- FIG. 1 In the illustration of FIG. 1 at the bottom of the chamber 2, there is an inlet 18 for dirty liquid, which contains ferromagnetic particles, see arrow 16.
- the inlet 18 is provided with an inlet valve 20.
- Fig. 1 above ie at the end of the chamber 2 near the axis of rotation 6 there is an outlet 22 for clean liquid, see arrow 14.
- the outlet 22 is provided with an automatic valve or a throttle valve 26.
- the magnetic filter can be retrofitted in existing systems.
- contaminated liquid containing ferromagnetic particles e.g., metal shavings cutting emulsion
- inlet 18 contaminated liquid containing ferromagnetic particles (e.g., metal shavings cutting emulsion) through inlet 18 enters chamber 2.
- the liquid then passes into the annular gap 12 and flows through this guided by the helices of the screw helix 10, see arrows 34.
- the ferromagnetic particles migrate outward to the wall of the chamber 2 and settle there.
- the clean liquid exits through the outlet 22 at the end of the chamber 2.
- the mud discharge valve 30 is closed during normal operation.
- the throttle valve is present, this is brought into the throttle position, so that less pure liquid from the magnetic filter occurs.
- the mud discharge valve 30 is opened.
- the motor 8 is turned on and rotates the inner tube 4 with the helical coil 10. The latter scrapes or scrapes off the particles from the chamber wall. The direction of rotation is chosen so that the particles are transported by the screw helix 10 in the direction of the sludge outlet 28.
- the inlet valve 20 can be opened and incoming dirty liquid for rinsing the ferromagnetic particles are used by the sludge outlet 28.
- the cleaning process requires little time, so that the interruption of the operation of the system is short.
- Fig. 2 shows a second embodiment according to the invention. As far as the parts are the same as those of the first embodiment, they are denoted by the same reference numerals and will not be described again.
- magnets 36 are arranged in the inner tube.
- the worm gear 10 is not attached to the inner tube 4, but is directly driven by the motor 8. It carries particles deposited during filter cleaning both from the chamber wall and from the inner tube.
- the sludge outlet 38 is cylindrical, so that the risk of blockage is lower.
- the mud drain 38 is provided with a drain valve 40.
- the cylindrical design is independent of the location of the magnet assembly, that is, whether they are located outside or inside. In the case of a horizontal chamber arrangement, a cylindrical particle outlet is preferred.
Landscapes
- Filtration Of Liquid (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2012/062103 WO2013189549A1 (en) | 2012-06-22 | 2012-06-22 | Device for separating out magnetizable impurities from flowing fluids |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2864050A1 true EP2864050A1 (en) | 2015-04-29 |
EP2864050B1 EP2864050B1 (en) | 2019-11-27 |
Family
ID=46603886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12742812.6A Active EP2864050B1 (en) | 2012-06-22 | 2012-06-22 | Device and method for separating out magnetizable impurities from flowing fluids |
Country Status (3)
Country | Link |
---|---|
US (1) | US20150298139A1 (en) |
EP (1) | EP2864050B1 (en) |
WO (1) | WO2013189549A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013008817A1 (en) * | 2013-05-25 | 2014-12-11 | Technische Universität Kaiserslautern | Device for separating particles from a fluid by magnetic separation |
NL2011221C2 (en) * | 2013-07-25 | 2015-01-27 | Lomapro B V | FILTER DEVICE AND METHOD FOR REMOVING MAGNETIZABLE PARTICLES FROM A FLUID. |
US9943092B1 (en) * | 2014-12-22 | 2018-04-17 | Roy Lee Garrison | Liquid processing system and method |
NO20150391A1 (en) * | 2015-03-31 | 2016-08-08 | Norse Oiltools As | Well cleaning tool and use of tool |
WO2016176578A1 (en) * | 2015-04-29 | 2016-11-03 | Fleenor Manufacturing, Inc. | Filter element with magnetic array |
EP3436201A1 (en) | 2016-04-01 | 2019-02-06 | Romar International Limited | Apparatus and method for removing magnetic particles from liquids or slurries from an oil or gas process |
GB201704360D0 (en) | 2017-03-20 | 2017-05-03 | Raptor Services (Scotland) Ltd | Apparatus and method |
HU5090U (en) * | 2018-05-11 | 2019-11-28 | Evolutionwater Kft | Device for magnetic treatment of fluids |
NO344882B1 (en) | 2018-09-17 | 2020-06-15 | Norse Oiltools As | Well tool |
WO2020167623A1 (en) * | 2019-02-11 | 2020-08-20 | North Carolina State University | Self-cleaning screen |
CN111085338A (en) * | 2019-12-31 | 2020-05-01 | 江西理工大学 | Magnetic flotation column with adjustable coil height and forced ore discharge device and flotation method |
CN115672546B (en) * | 2023-01-05 | 2023-05-16 | 太原理工大学 | Rotary magnetic field solenoid type magnetic separator and system for magnetite concentration |
CN115925027B (en) * | 2023-03-10 | 2023-05-30 | 湖南国重环境科技有限责任公司 | Fermentation type antibiotic production wastewater pretreatment system |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US466513A (en) * | 1892-01-05 | Ore-separator | ||
US1056318A (en) * | 1911-05-17 | 1913-03-18 | Stephan Brueck | Apparatus for magnetically separating materials. |
US1340457A (en) * | 1916-07-20 | 1920-05-18 | Newton Edmund | Apparatus for separating magnetic material |
DE1134173B (en) * | 1953-07-15 | 1962-08-02 | Hans Thoma Dr Ing | Magnetic filter |
DE1160130B (en) | 1959-11-23 | 1963-12-27 | Heinrich Sommermeyer | Method and device for magnetic filtering, preferably magnetically conductive particles from flowing media |
DE1794280B1 (en) | 1968-05-14 | 1971-02-11 | Stelzner & Co | Magnetic filter device |
US3759367A (en) * | 1971-05-13 | 1973-09-18 | E Elliott | Magnetic article sorting apparatus |
JPS50125368A (en) * | 1974-03-22 | 1975-10-02 | ||
JPS5891452U (en) * | 1981-12-16 | 1983-06-21 | 稲葉 栄子 | magnetic filter tube |
US4784759A (en) * | 1987-03-17 | 1988-11-15 | Elliott Eldon G | Magnetic separation machine |
DE4130421A1 (en) * | 1991-09-10 | 1993-03-11 | Mannesmann Ag | CHAIN MAGNETIC SEPARATOR |
US5170891A (en) * | 1991-09-20 | 1992-12-15 | Venturedyne Limited | Self-cleaning magnetic separator |
US5377816A (en) * | 1993-07-15 | 1995-01-03 | Materials Research Corp. | Spiral magnetic linear translating mechanism |
FR2722120B1 (en) * | 1994-07-08 | 1997-12-26 | Lenoir Raoul Ets | METHOD AND DEVICE FOR SEPARATING FERROMAGNETIC PARTICLES FROM A MIXTURE CONTAINING THESE PARTICLES |
US5667074A (en) * | 1994-10-14 | 1997-09-16 | Crumbrubber Technology Co., Inc. | Magnetic separator |
DE19823765C1 (en) * | 1998-05-28 | 2000-02-03 | Dornier Gmbh Lindauer | Large area filtration device for thermoplastic melts for extruders |
AU2003223165A1 (en) * | 2002-02-01 | 2003-09-02 | Exportech Company, Inc. | Continuous magnetic separator and process |
DE10251570A1 (en) * | 2002-11-06 | 2004-05-19 | Dürr Ecoclean GmbH | Solid particle separator for particles in mixture with liquid has collecting container which can be moved between filling position and liquid drain position |
DE10331022A1 (en) | 2003-07-09 | 2004-09-09 | Voith Paper Patent Gmbh | Process to remove metal particles from suspension of paper fibre by fixed magnetic cylinder surrounded by rotating helical blade and outer tube |
AU2013210639A1 (en) * | 2012-01-22 | 2014-07-03 | Amiad Water Systems Ltd. | Submersible filter system |
-
2012
- 2012-06-22 EP EP12742812.6A patent/EP2864050B1/en active Active
- 2012-06-22 US US14/410,430 patent/US20150298139A1/en not_active Abandoned
- 2012-06-22 WO PCT/EP2012/062103 patent/WO2013189549A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013189549A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2864050B1 (en) | 2019-11-27 |
WO2013189549A1 (en) | 2013-12-27 |
US20150298139A1 (en) | 2015-10-22 |
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