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EP0429719A1 - Magnetscheider - Google Patents

Magnetscheider Download PDF

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Publication number
EP0429719A1
EP0429719A1 EP89203020A EP89203020A EP0429719A1 EP 0429719 A1 EP0429719 A1 EP 0429719A1 EP 89203020 A EP89203020 A EP 89203020A EP 89203020 A EP89203020 A EP 89203020A EP 0429719 A1 EP0429719 A1 EP 0429719A1
Authority
EP
European Patent Office
Prior art keywords
filter
magnetic separation
separation apparatus
magnetic
channel
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.)
Withdrawn
Application number
EP89203020A
Other languages
English (en)
French (fr)
Inventor
Geert Van Der Vos
Rintje Boersma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ENVIMAG B.V.
Original Assignee
ENVIMAG BV
Smit Transformatoren BV
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
Priority claimed from NL8801463A external-priority patent/NL8801463A/nl
Application filed by ENVIMAG BV, Smit Transformatoren BV filed Critical ENVIMAG BV
Priority to EP89203020A priority Critical patent/EP0429719A1/de
Publication of EP0429719A1 publication Critical patent/EP0429719A1/de
Withdrawn legal-status Critical Current

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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
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0335—Component parts; Auxiliary operations characterised by the magnetic circuit using coils
    • 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
    • B03C1/025—High gradient magnetic separators
    • 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
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/032—Matrix cleaning systems

Definitions

  • the present invention relates to a magnetic separa­tion apparatus, comprising a supply channel, a magnetisable filter and a discharge channel.
  • the liquid, from which mag­netisable parts have to be separated is supplied from under­neath through a supply channel, and is supplied to a magneti­sable filter, comprising in this case two parts, after which the cleaned liquid is discharged through a discharge channel.
  • a magneti­sable filter comprising in this case two parts, after which the cleaned liquid is discharged through a discharge channel.
  • the aim of the present invention is to provide such a magnetic separation apparatus, in which - when maintaining a magnetisable filter with limited dimensions - the intervals between rinsing actions can be extended substantially.
  • This aim is reached by shaping the supply channel such, that before the passing of the filter at least a part of the material to be separated precipitates.
  • the magnetic separator comprises a vessel 1, of which the outer wall is rotation-symmetric.
  • the upper part of the wall 2 of the vessel is cilindrical, the adjacent lower part is conical, while the part underneath is again cilindri­cal.
  • the vessel 1 is closed by a circular cover 3.
  • the cover 3 is fixed to the wall of the vessel by means of bolts 4.
  • the vessel 1 is closed by a substantially conical lower part 5, which is again connec­ted with the wall 2 of the vessel by means of bolts 4. This lower part encloses a chamber 25.
  • a core 6 Fixed relative to the middle of the cover 3 a core 6 has been provided, which again is coaxial relative to the wall of the vessel.
  • a channel 7 has been provided in the middle of the core. The lower side of the channel 6 is widened, so that a chamber 8 is obtained.
  • a substantially annular filter 9 which is composed of a magnetisable grid with small apertures.
  • the lower half of the filter encloses an annular wall 10.
  • At the upper side of the filter is deliniated by a fi­xation ring 11, whereas the filter is fixed at its lower side by a fixation ring 12 extending substantially at the inner side underneath the filter 9.
  • This fixation ring 12 is fixed to the conical lower part 5 by means of support 13. Both fi­xation rings 11, 12 are drawn towards each other by means of rods 15, so that the filter 9 is enclosed.
  • a coil 14 For excitation of the magnetic circuit a coil 14 has been provided around the core and directly adjacent to it.
  • this coil 14 comprises connection leads not shown in the drawings for excitation of the coil.
  • the magnetic circuit comprises the core 6, the co­ver 3, the wall 2 of the vessel, the filter 9 and the conical lower part 5.
  • the magne­tic circuit is dimensioned such that within the filter 9 an effective magnetic field is established with a high gradient. This high gradient is also due to the small dimensions of the apertures of the grid.
  • the core 6 has such a shape that the edges at the lower side thereof are rounded off, so that the required smaller gradients in the field are generated.
  • the chambers 25 and 8 act as a magnetic filter with a small gradient of the field.
  • a supply channel 17 for supplying liquid to be cleaned is connected with a channel 7 extending through the core 6 through a one-way valve 16.
  • the one-way valve 16 is implemented as a ball valve, but it is also possible to implement this in another way.
  • the one-­way valve 16 is again connected with the cover 3 by means of bolts 4.
  • a discharge channel 18 is connected with the substantial annular chamber 20 located between the cover 3, the wall 2 of the vessel, the closing ring 11, the filter 9, the coil 14 and the core 6 by means of a biased valve 19 and a channel 21 provided in the cover 3.
  • annular chamber 20 is also connected with a vessel not depicted in the drawing, in which air or another gas has been stored under a high pressure.
  • chamber 25 is connected with a dischar­ge channel 24 for rinsing water by means of an aperture pro­vided in the conical lower part 5 and a biased valve 26.
  • This magnetic separation apparatus is used according to the following descrip­tion: Initially the coil 24 is switched on, so that the mag­netic circuit is excited and the filter 9 with a high gra­dient in the chambers 8 and 25 with a low gradient are magne­ tised. Subsequently the liquid to be cleaned is supplied through the channel 17, the one-way valve 16 and the channel 7 to the chamber 8. To allow cleaning by means of magnetic separation the pollution has to be composed of magnetisable parts or has to be united with magnetisable material.
  • the coil 14 is switched off to cancel the magnetisation of the filter 9 and of the chambers 8 and 25. It can even be required to excite the magnetic during a short period in the opposite direction to compensate remanent magnetism.
  • compressed air is supplied, preferrably under a pressure, as high as possible through the controlled valve 23 and the channel 22, so that the one-way valves 16 and 19 will close.
  • the liquid present with­in the chamber 20 will be pressed through the filter with a high force and speed, taking the pollutions left behind during the magnetisation of the filter with it.
  • the amount of liquid present in the annular chamber 20 is sufficient to rinse the whole annular filter 9.
  • the rinsing liquid, strongly polluted is carried off through the wall of the conical lower part 5, in which also the material precipitated locally is carried away through the biased one-way valve 26, which will open now, and through the discharge channel 24.
  • valve 23 is closed and is the an­nular chamber aired through an airing valve not depicted in the drawing, after which the coil 14 can be switched on again and the whole start can start over again.

Landscapes

  • Water Treatment By Electricity Or Magnetism (AREA)
EP89203020A 1988-06-07 1989-11-27 Magnetscheider Withdrawn EP0429719A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89203020A EP0429719A1 (de) 1988-06-07 1989-11-27 Magnetscheider

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8801463A NL8801463A (nl) 1988-06-07 1988-06-07 Magnetische separatie-inrichting.
EP89203020A EP0429719A1 (de) 1988-06-07 1989-11-27 Magnetscheider

Publications (1)

Publication Number Publication Date
EP0429719A1 true EP0429719A1 (de) 1991-06-05

Family

ID=26121394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89203020A Withdrawn EP0429719A1 (de) 1988-06-07 1989-11-27 Magnetscheider

Country Status (1)

Country Link
EP (1) EP0429719A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2114453A1 (es) * 1995-09-20 1998-05-16 Univ De Salamanca Seccioon De Filtro de mallas magnetizables permanentes y no permanentes para la captura de particulas paramagneticas y ferromagneticas.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078499A1 (de) * 1981-11-02 1983-05-11 Hitachi, Ltd. Verfahren und Apparat zur Flüssigkeitsreinigung
EP0082925A1 (de) * 1981-12-30 1983-07-06 Daidotokushuko Kabushiki Kaisha Magnetischer Abscheider
EP0345853A1 (de) * 1988-06-07 1989-12-13 Envimag B.V. Magnetscheider

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078499A1 (de) * 1981-11-02 1983-05-11 Hitachi, Ltd. Verfahren und Apparat zur Flüssigkeitsreinigung
EP0082925A1 (de) * 1981-12-30 1983-07-06 Daidotokushuko Kabushiki Kaisha Magnetischer Abscheider
EP0345853A1 (de) * 1988-06-07 1989-12-13 Envimag B.V. Magnetscheider

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 5, no. 188 (C-81)[860], 27th November 1981, page 61 C 81; & JP-A³56 111 012 (HITACHI PLANT KENSETSU K.K.) 02-09-1981 *
SOVIET INVENTIONS ILLUSTRATED, week D39, 4th November 1981, abstract no. 71237D/39, Derwent Publications Ltd, London, GB; & SU-A-793 605 (LENGD POLY (TSEN)) 07-01-1981 *
SOVIET INVENTIONS ILLUSTRATED, week J51, 9th February 1983, abstract no. 10992J/51, Derwent Publications Ltd, London, GB; & SU-A-906 619 (UFA AVIATION INST.) 18-07-1980 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2114453A1 (es) * 1995-09-20 1998-05-16 Univ De Salamanca Seccioon De Filtro de mallas magnetizables permanentes y no permanentes para la captura de particulas paramagneticas y ferromagneticas.

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): AT BE ES IT

17P Request for examination filed

Effective date: 19911016

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ENVIMAG B.V.

17Q First examination report despatched

Effective date: 19930118

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19930529