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EP1266693A2 - Mesures pour éviter des densités de champs électriques à effet destructif locale sur un ensemble d'électrodes symétriques - Google Patents

Mesures pour éviter des densités de champs électriques à effet destructif locale sur un ensemble d'électrodes symétriques Download PDF

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Publication number
EP1266693A2
EP1266693A2 EP02009524A EP02009524A EP1266693A2 EP 1266693 A2 EP1266693 A2 EP 1266693A2 EP 02009524 A EP02009524 A EP 02009524A EP 02009524 A EP02009524 A EP 02009524A EP 1266693 A2 EP1266693 A2 EP 1266693A2
Authority
EP
European Patent Office
Prior art keywords
electrode
reaction vessel
process liquid
measures
insulator
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
Application number
EP02009524A
Other languages
German (de)
English (en)
Other versions
EP1266693B1 (fr
EP1266693A3 (fr
Inventor
Wolfgang Dr. Frey
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.)
Karlsruher Institut fuer Technologie KIT
Original Assignee
Forschungszentrum Karlsruhe GmbH
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
Application filed by Forschungszentrum Karlsruhe GmbH filed Critical Forschungszentrum Karlsruhe GmbH
Publication of EP1266693A2 publication Critical patent/EP1266693A2/fr
Publication of EP1266693A3 publication Critical patent/EP1266693A3/fr
Application granted granted Critical
Publication of EP1266693B1 publication Critical patent/EP1266693B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
    • B02C2019/183—Crushing by discharge of high electrical energy

Definitions

  • the invention relates to a measure or measures to avoid of locally destructive electric field densities on a rotationally symmetrical electrode arrangement.
  • Such an electrode arrangement is part of a Fragmentation. It consists of one with high voltage actable, rod-shaped electrode, the high-voltage electrode and one always at a fixed electrical potential lying counter electrode. Both have a predetermined distance to each other.
  • the rod longitudinal axis of the high voltage electrode lies on the axis of rotation.
  • the counter electrode is a component the bottom of a reaction vessel. It is with process fluid is filled and is loaded with process goods that via pulsed and powerful electrical discharge in the Electrode gap to a required grain size range is fractionated.
  • the high voltage electrode is with a Insulator leaving a bare end area exposed given length encased. This bare end area is completely immersed in the process liquid.
  • the electrode arrangement is connected to an electrical energy store, a Marx generator z. B., connected when reached a predetermined charging voltage over a spark gap is discharged into the two-electrode system.
  • a Marx generator z. B. connected when reached a predetermined charging voltage over a spark gap is discharged into the two-electrode system.
  • reaction liquid often water but also others suitable liquids, process material in the form of debris, any conglomerate baked tightly together Solid, tilted.
  • the discharge is controlled by setting the electrical parameters controlled so that there are high-current discharge channels between form the two electrodes and thereby the same blow up by electrical influence and mechanically over Shatter shock waves.
  • the grain size of the fragments can be can be controlled within limits by the number of discharges. At the deepest area of the reaction vessel are the finely smashed Parts removed (see DE 195 34 232).
  • Central but highly stressed component of such a fragmentation system is that in the process liquid in the reaction vessel protruding electrode, especially the place where the three media: bare electrode, insulating jacket end and process liquid - This is a ring area - meet each other at the same time.
  • the high voltage electrode is from the high voltage connection to the bare tip area taking into account the pulsed operation with tough insulator material immediately encased around the bare electrode surface, that has direct contact with the process liquid to keep small. Loss currents before the ignition of the fragmentation Discharge channel between the electrode tip and the counter electrode in the bottom of the reaction vessel the electrolytic conductivity of the process liquid flow should be prevented, but at least on a tolerable Be limited. So that will be none or at least consumes less energy in the pre-discharge phase. In order to there is more energy in the fragmentation effective per discharge Discharge phase available.
  • Discharge channels start from the free electrode surface outgoing, at the joint process liquid insulator electrode and preferably run along the insulator surface especially if there is little fragmentation material in the reaction vessel located, the isolator is due to the high current Discharge destroyed.
  • the invention is based, with the electrode their encasing insulator made of tough material in their geometry in the border area insulator-electrode tip process liquid to be designed so that the tangential to the insulator surface directed field strength at the isolator forehead at the transition to Electrode is as small as possible.
  • the rotationally symmetrical structure is: insulator electrode shown in sections.
  • the arrangement is here only half of the axis of rotation due to the nature of the symmetry, the left edge of the picture.
  • insulator, electrode and process liquid here water, all three mutually meet (three-media interface / area), exists, field-related seen the field relief.
  • the electrode has where them from the encasing insulator into the process liquid an annular bulge occurs around the circumference, facing outwards has no edges, i.e. with a radius equal to half Bead thickness is rounded.
  • the curve can also be used with others Measurements must be carried out, this is only manufacturing technology very easy.
  • the density of the equipotential lines is in this three-media impact area low, hence very likely to start from there no discharge channels. They are most likely to form or preferably in areas of high equipotential line density off, i.e. on the area facing the counter electrode the forehead of the bead or just the tip of the electrode, like the arrangement of the line array shows.
  • the discharges are in the Start the front area of the bare electrode preferably.
  • the frustoconical shape, indicated in Figure 2 here is a grid made of dielectric, tough material like PE or nylon or the like. That is already sufficiently fragmented Well can trickle through in the area. This Depending on the dielectric property, the grating tightens the potential lines in addition to themselves and thus sets the Density of the same further down in the electrode area. The condition, that discharge channels can start there through these measures also very considerably and therefore effectively reduced.
  • the comparison shows the effectiveness of the measure the design (Figure 3) according to the prior art with the ( Figure 1 and / or 2) of the invention.
  • the density of the equipotential lines is in the conventional design in the three media zone incomparably higher and thus the electrical load the insulator in its forehead zone much larger.
  • FIG. 4 shows the meaning of the electrode and their stress in operation are highlighted.
  • the whole Fragmentation system is schematic with its essential components outlined.
  • the Marx generator is the fragmentation device via the im simplest case in the case of self-breakthrough spark gap connected to the output. It couples to the spark gap Reaction tube protruding immediately.
  • the electrode is covered with the insulator.
  • the insulator protrudes above the level of the process liquid, here water, out, so that in this area in operation safely Isolation exists, it leaves the end area in the process liquid the electrode is free, since only from there are the discharge channels in series through the fragmentation material and the process liquid should train.
  • the design of the counter electrode is process dependent and here e.g. only the bottom of the reaction bucket from which it is electrical goes straight back to the Marx generator.

Landscapes

  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
  • Disintegrating Or Milling (AREA)
  • Ceramic Capacitors (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP02009524A 2001-06-01 2002-04-26 Appareil de fragmentation et de concassage avec ensemble d'électrodes symétriques Expired - Lifetime EP1266693B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10126646 2001-06-01
DE10126646A DE10126646C2 (de) 2001-06-01 2001-06-01 Rotationssymmetrische Elektrodenanordnung aus einer mit Hochspannung beaufschlagbaren, stabförmigen Elektrode

Publications (3)

Publication Number Publication Date
EP1266693A2 true EP1266693A2 (fr) 2002-12-18
EP1266693A3 EP1266693A3 (fr) 2004-10-20
EP1266693B1 EP1266693B1 (fr) 2005-10-05

Family

ID=7686836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02009524A Expired - Lifetime EP1266693B1 (fr) 2001-06-01 2002-04-26 Appareil de fragmentation et de concassage avec ensemble d'électrodes symétriques

Country Status (3)

Country Link
EP (1) EP1266693B1 (fr)
AT (1) ATE305820T1 (fr)
DE (2) DE10126646C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017172A1 (fr) * 2006-08-11 2008-02-14 Selfrag Ag Procédé de fragmentation de matériau au moyen de décharges à haute tension
WO2008113189A1 (fr) * 2007-03-16 2008-09-25 Selfrag Ag Récipient d'échantillons et dispositif de fragmentation électrodynamique d'échantillons
CN112169965A (zh) * 2020-09-22 2021-01-05 东北大学 一种矿石高压脉冲放电预处理系统及其使用方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534232A1 (de) 1995-09-15 1997-03-20 Karlsruhe Forschzent Verfahren zur Zerkleinerung und Zertrümmerung von aus nichtmetallischen oder teilweise metallischen Bestandteilen konglomerierten Festkörpern und zur Zerkleinerung homogener nichtmetallischer Festkörper

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1719075A1 (ru) * 1990-04-06 1992-03-15 Экспериментальный кооператив "ЭГИДА-А" Устройство дл электрогидравлического дроблени и измельчени твердых материалов
DE19545580C2 (de) * 1995-12-07 2003-02-13 Rheinmetall W & M Gmbh Verfahren und Anordnung zum Aufschluß von elastischen Materialien in Verbindung mit metallischen Materialien
DE19736027C2 (de) * 1997-08-20 2000-11-02 Tzn Forschung & Entwicklung Verfahren und Vorrichtung zum Aufschluß von Beton, insbesondere von Stahlbetonplatten

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534232A1 (de) 1995-09-15 1997-03-20 Karlsruhe Forschzent Verfahren zur Zerkleinerung und Zertrümmerung von aus nichtmetallischen oder teilweise metallischen Bestandteilen konglomerierten Festkörpern und zur Zerkleinerung homogener nichtmetallischer Festkörper

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017172A1 (fr) * 2006-08-11 2008-02-14 Selfrag Ag Procédé de fragmentation de matériau au moyen de décharges à haute tension
WO2008113189A1 (fr) * 2007-03-16 2008-09-25 Selfrag Ag Récipient d'échantillons et dispositif de fragmentation électrodynamique d'échantillons
RU2422207C2 (ru) * 2007-03-16 2011-06-27 Зельфраг Аг Устройство для электродинамической фрагментации образцов
AU2007349730B2 (en) * 2007-03-16 2011-08-25 Selfrag Ag Sample holder and assembly for the electrodynamic fragmentation of samples
US8138952B2 (en) 2007-03-16 2012-03-20 Selfrag Ag Sample holder and assembly for the electrodynamic fragmentation of samples
CN112169965A (zh) * 2020-09-22 2021-01-05 东北大学 一种矿石高压脉冲放电预处理系统及其使用方法

Also Published As

Publication number Publication date
DE10126646A1 (de) 2002-12-12
DE50204434D1 (de) 2005-11-10
ATE305820T1 (de) 2005-10-15
EP1266693B1 (fr) 2005-10-05
EP1266693A3 (fr) 2004-10-20
DE10126646C2 (de) 2003-04-10

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