EP1243339B1 - Process of selectively separating particles from a suspension - Google Patents

Process of selectively separating particles from a suspension Download PDF

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Publication number
EP1243339B1
EP1243339B1 EP02004850A EP02004850A EP1243339B1 EP 1243339 B1 EP1243339 B1 EP 1243339B1 EP 02004850 A EP02004850 A EP 02004850A EP 02004850 A EP02004850 A EP 02004850A EP 1243339 B1 EP1243339 B1 EP 1243339B1
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EP
European Patent Office
Prior art keywords
fragmentation
fragmented
process liquid
basket
shock wave
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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.)
Expired - Lifetime
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EP02004850A
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German (de)
French (fr)
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EP1243339A2 (en
EP1243339A3 (en
Inventor
Wolfram Edinger
Volker Neubert
Christoph Dr. Schultheiss
Ralf Strässner
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Forschungszentrum Karlsruhe GmbH
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Forschungszentrum Karlsruhe GmbH
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    • 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 shock wave generating fragmenting device with a suction device. Particles with at most The target grain size will be selectively from a suspension separated.
  • a method and a device is known known, mineral particles in a liquid in suspension to keep.
  • the latter ends in a centrifuge separator, in which a first rough separation takes place, wherein the coarse fractions are returned to the shredder and the fines a subsequent, second centrifugal separator be supplied.
  • the coarse shares from there are also fed back to the crusher, the fines one Container for collecting the same, the final product. It will the colloid fed to an evaporator and from there finally Dried into a silo.
  • the shredding will carried out with purely grind-like process
  • the filled in the reaction vessel, in the process fluid sinking Fragmentiergut is in the reaction space between the tip of the high voltage electrode and the bottom of the vessel the electrical discharges of a capacitive energy memory exposed and smashed. From a certain grain size are fractional parts by the discharge or the Shock wave in a row in the process fluid whirled up and distributed in it. It creates a kind of suspension. Not aspirated Fractions on the other hand, decline again and become again exposed to the discharge and thus the further fragmentation.
  • the basket at the end of the suction device, which is in the process fluid protrudes, and the mesh surrounding the basket are made of a tough, shockwave resistant material.
  • the Mesh size of the fabric determines up to which grain size be sucked in the process liquid floating particles. Particles with overlying grain size, oversize, become held in the process fluid and through the basket incoming shockwave and its dissolving effect again in forced back the fragmentation volume to the subsequent smashing operation to be suspended again.
  • the mesh fabric on the one hand from an electrically conductive Fabric such as stainless steel (claim 2), which, as required on the mechanical stress is also chemically resistant to the Process liquid and the substances dissolved therein, or from a Dielectric fabrics such as high-strength plastics with even such mechanically and chemically resistant properties.
  • an electrically conductive Fabric such as stainless steel (claim 2), which, as required on the mechanical stress is also chemically resistant to the Process liquid and the substances dissolved therein, or from a Dielectric fabrics such as high-strength plastics with even such mechanically and chemically resistant properties.
  • a Fragmentierstrom is outlined, whose Smashing device according to the principle of electrical Discharge of a capacitive energy storage, the FRANKA principle for example, works.
  • the drawing shows in her figure 1 the electrodynamic fragmentation in principle and in Figure 2 shows the reaction vessel during the process.
  • the reaction vessel ( Figure 2) is partially with process fluid filled, which here is water, because e.g. such substances as Ceramics, glass and minerals should be fragmented.
  • process fluid here is water, because e.g. such substances as Ceramics, glass and minerals should be fragmented.
  • the high voltage electrode is with an insulation sheathed so that only from the area of their tip the discharges take place towards the bottom of the reaction vessel.
  • the soil is here curved, approximately spherical, so that the Process material accumulates there and exposed to discharge safely is.
  • the suction device at its beginning is caused by the unloading Shock wave in the process liquid shaken and from the on freed its network fragments, which then in the discharge volume sink back to the next discharge again to be exposed to fragmentation.
  • the Absaugkorb sits at the end of the suction device (claim 2), in which the aspirated from the process liquid suspension is transported to the inlet into the sediment tray. The Particles settle there on the ground, and those of suspended matter liberated process liquid is finally returned to the reaction vessel fed.

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  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Disintegrating Or Milling (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

The device is arranged in a reaction vessel filled with process liquid to a defined level and covered at its end by a suction basket enveloped in a mesh of opening size corresponding to the maximum grain size to be sucked up. The basket and mesh consist of a tough, shock-wave resistant material that prevent the passage of larger particles, which are returned to the fragmentation process.

Description

Die Erfindung betrifft eine schockwellenerzeugende Fragmentiereinrichtung mit einer Absaugeinrichtung. Partikel mit höchstens der Zielkorngröße werden daraus selektiv aus einer Suspension abgetrennt.The invention relates to a shock wave generating fragmenting device with a suction device. Particles with at most The target grain size will be selectively from a suspension separated.

In herkömmlichen Einrichtungen zum Zerkleinern, wie Backenbrecher, Prallbrecher, und Mahlen, wie Wälzmühlen und Schlagmühlen, können zerkleinerte Partikel nach Erreichen der vorgesehenen Grenzkorngröße nicht ohne weiteres aus der Suspension abgesaugt werden, weil beim Absaugen die Partikel die Siebgewebe zusetzen und verstopfen.In conventional crushing devices, such as jaw crushers, Impact crushers, and grinding, such as roller mills and impact mills, can crushed particles after reaching the intended Border grain size not readily from the suspension be sucked off, because when sucking the particles, the mesh Add and clog.

Aus der FR-A 1 169 141 ist ein Verfahren und eine Einrichtung bekannt, mineralische Partikel in einer Flüssigkeit in Suspension zu halten. Hierzu ist ein Zerkleinerer mit einem Mischbrecher in Reihe geschaltet. Letzterer mündet in eine Zentrifugentrenner, in dem eine erste Grobtrennung erfolgt, wobei die Grobanteile in den Zerkleinerer zurückgeführt werden und die Feinanteile einem nachfolgenden, zweiten Zentrifugentrenner zugeführt werden. Die Grobanteile von dort werden ebenfalls wieder dem Zerkleinerer zugeführt, die Feinanteile einem Behälter zum Auffangen derselben, dem Endprodukt. Daraus wird das Kolloid einem Verdampfer zugeführt und von dort schließlich getrocknet in einen Silo geleitet. Die Zerkleinerung wird mit rein mahlartigen Verfahren durchgeführtFrom FR-A-1 169 141 a method and a device is known known, mineral particles in a liquid in suspension to keep. For this purpose, a crusher with a mixing crusher connected in series. The latter ends in a centrifuge separator, in which a first rough separation takes place, wherein the coarse fractions are returned to the shredder and the fines a subsequent, second centrifugal separator be supplied. The coarse shares from there are also fed back to the crusher, the fines one Container for collecting the same, the final product. It will the colloid fed to an evaporator and from there finally Dried into a silo. The shredding will carried out with purely grind-like process

Bekannt sind Fragmentieranlagen, in denen über stromstarke Entladungen in einer Prozessflüssigkeit Schockwellen entlang den Entladungskanälen an dem zu fragmentierenden Gut entlang erzeugt werden, die dann auf das zu fragmentierende Gut, von außen schlagend, einwirken. Are known Fragmentieranlagen, in which over current strong Discharges in a process fluid along shock waves the discharge channels along the property to be fragmented be generated, which then on the fragmented Good, of striking outside, act.

Eine energetisch optimierte Art der Fragmentierung wird in der DE 195 34 232 beschrieben. In ihr wird zu zertrümmerndes Gut gemäß dem erläuterten Prinzip FRANKA elektrischen Entladungen eines kapazitiven Speichers ausgesetzt, und zwar derart, dass durch die elektrischen Entladungen in den Entladungskanälen von der Hochspannungselektrodenspitze bis zum elektrisch leitenden Bodenbereich Schockwellen erzeugt werden, die auf die Umgebung belastend einwirken und dementsprechend konstruktive Maßnahmen für einen technisch brauchbaren Dauerbetrieb verlangen.An energetically optimized type of fragmentation is used in the DE 195 34 232 described. In her becomes smashed good according to the explained principle FRANKA electrical discharges a capacitive memory, in such a way that by the electrical discharges in the discharge channels from the high voltage electrode tip to the electrically conductive Ground area shock waves are generated on the Environment stressful acting and accordingly constructive Require measures for a technically usable continuous operation.

Das in das Reaktionsgefäß eingefüllte, in der Prozessflüssigkeit absinkende Fragmentiergut wird im Reaktionsraum zwischen der Spitze der Hochspannungselektrode und dem Boden des Gefäßes den elektrischen Entladungen eines kapazitiven Energie speichers ausgesetzt und zertrümmert. Ab einer gewissen Korngröße werden Fraktionenteile durch die Entladung bzw. die Schockwelle in Folge in der Prozeßflüssigkeit aufgewirbelt und darin verteilt. Es entsteht eine Art Suspension. Nicht abgesaugte Fraktionsteile hingegen, sinken wieder ab und werden erneut der Entladung und damit der weiteren Zertrümmerung ausgesetzt.The filled in the reaction vessel, in the process fluid sinking Fragmentiergut is in the reaction space between the tip of the high voltage electrode and the bottom of the vessel the electrical discharges of a capacitive energy memory exposed and smashed. From a certain grain size are fractional parts by the discharge or the Shock wave in a row in the process fluid whirled up and distributed in it. It creates a kind of suspension. Not aspirated Fractions on the other hand, decline again and become again exposed to the discharge and thus the further fragmentation.

Entsprechend der Zuführung von zu zertrümmerndem Gut muss das fragmentierte Gut abgesogen werden. Für die weitere Prozessierung des fragmentierten Gutes ist es von Wichtigkeit, daß das Gut in Korngrößenbereiche aufgeteilt werden kann, ähnlich wie Kies bzw. sand von Kieswerken.According to the supply of smashed good that must fragmented goods are sucked off. For further processing Of the fragmented good, it is important that the Good in grain size ranges can be divided, similar to Gravel or sand of gravel works.

Hieraus ergibt sich die Aufgabe, die der Erfindung zugrunde liegt, nämlich eine Absaugvorrichtung in die Prozessflüssigkeit zu hängen, mit der während des Prozessierens ständig bis zu maximal vorgegebenen Korngröße fragmentiertes Gut abgesogen werden kann.This results in the task underlying the invention is located, namely a suction device in the process fluid to hang up with while constantly processing Suctioned fragment to a maximum of predetermined grain size can be.

Die Aufgabe wird durch eine Absaugvorrichtung gemäß dem Oberbegriff des Anspruchs 1 und seiner kennzeichnenden Merkmale gelöst.The object is achieved by a suction device according to the preamble of claim 1 and its characterizing features solved.

Der Korb am Ende der Absaugvorrichtung, die in die Prozessflüssigkeit ragt, und das den Korb umhüllende Maschengewebe sind aus einem zähen, schockwellenresistenten Material. Die Maschenweite des Gewebes legt fest, bis zu welcher Korngröße in der Prozessflüssigkeit schwebende Partikel abgesaugt werden. Partikel mit darüber liegender Korngröße, Überkorn, werden in der Prozessflüssigkeit gehalten und durch die am Korb ankommende Schockwelle und deren loslösender Wirkung erneut in das Fragmentiervolumen zurückgezwungen, um dem folgenden Zertrümmerungsvorgang erneut ausgesetzt zu werden. The basket at the end of the suction device, which is in the process fluid protrudes, and the mesh surrounding the basket are made of a tough, shockwave resistant material. The Mesh size of the fabric determines up to which grain size be sucked in the process liquid floating particles. Particles with overlying grain size, oversize, become held in the process fluid and through the basket incoming shockwave and its dissolving effect again in forced back the fragmentation volume to the subsequent smashing operation to be suspended again.

Je nach Prozessgut und dazu geeigneter Prozessflüssigkeit ist das Maschengewebe einerseits aus einem elektrisch leitfähigem Gewebe wie Edelstahl (Anspruch 2), das, wie gefordert über die mechanische Belastung hinaus chemisch resistent ist gegen die Prozessflüssigkeit und der darin gelösten Stoffe, oder aus einem dielektrischen Gewebe wie hochzähe Kunststoffe mit eben solchen mechanisch und chemisch resistenten Eigenschaften.Depending on process material and suitable process fluid the mesh fabric on the one hand from an electrically conductive Fabric such as stainless steel (claim 2), which, as required on the mechanical stress is also chemically resistant to the Process liquid and the substances dissolved therein, or from a Dielectric fabrics such as high-strength plastics with even such mechanically and chemically resistant properties.

Da solche Absaugkörbe schnell austauschbar sind und durch Absaugkörbe mit anderer umgebender Maschenweite am Absaugkorb ersetzt werden können, ist die Erzeugung schmalbandiger Korngrößenschüttungen leicht erzielbar. Bei jeder Stoßwellenerzeugung findet stets auch ein Freiklopfen des den Absaugkorb umgebenden Gitters statt. Dadurch erst ist ein kontinuierlicher Betrieb einer solchen Fragmentieranlage möglich, der nicht durch eine besondere Reinigungsphase unterbrochen werden muß.Since such suction baskets are quickly interchangeable and by suction baskets with other surrounding mesh on the suction basket can be replaced, is the production of narrow-band grain size beds easily achievable. At every shock wave generation always finds a free knocking of the Absaugkorb surrounding Grid held. This first is a continuous one Operation of such a Fragmentieranlage possible, not must be interrupted by a special cleaning phase.

In der Zeichnung ist eine Fragmentieranlage skizziert, deren Zertrümmerungseinrichtung nach dem Prinzip der elektrischen Entladung eines kapazitiven Energiespeichers, dem FRANKA-Prinzip beispielsweise, arbeitet. Die Zeichnung zeigt in ihrer Figur 1 die elektrodynamische Fragmentierung im Prinzip und in ihrer Figur 2 den Reaktionsbehälter während des Prozesses.In the drawing, a Fragmentieranlage is outlined, whose Smashing device according to the principle of electrical Discharge of a capacitive energy storage, the FRANKA principle for example, works. The drawing shows in her figure 1 the electrodynamic fragmentation in principle and in Figure 2 shows the reaction vessel during the process.

Das Reaktionsgefäß (Figur 2) ist teilweise mit Prozessflüssigkeit gefüllt, die hier Wasser ist, weil z.B. solche Stoffe wie Keramik, Glas und Minerale fragmentiert werden sollen. In die Flüssigkeit ragt die Hochspannungselektrode entlang der Gefäßachse und hält mit ihrer freien Stirn einen vorgegebenen Abstand zum Boden des Gefäß. Die Hochspannungselektrode ist mit einer Isolation ummantelt, damit nur vom Bereich ihrer Spitze die Entladungen zum Boden des Reaktionsgefäßes hin erfolgen. Der Boden ist hier gekrümmt, etwa kugelförmig, so daß sich das Prozessgut dort ansammelt und sicher der Entladung ausgesetzt ist. The reaction vessel (Figure 2) is partially with process fluid filled, which here is water, because e.g. such substances as Ceramics, glass and minerals should be fragmented. In the Liquid protrudes the high voltage electrode along the vessel axis and keeps with her free forehead a predetermined distance to the bottom of the vessel. The high voltage electrode is with an insulation sheathed so that only from the area of their tip the discharges take place towards the bottom of the reaction vessel. The soil is here curved, approximately spherical, so that the Process material accumulates there and exposed to discharge safely is.

Die zu fragmentierenden, zunächst noch mehr oder weniger großvolumigen Festkörpersubstanzen werden über eine Zuleitung unter Beimengung von Wasser in das Reaktionsgefäß geschüttet (Figur 1), sinken darin ab und sind im eigentlichen Prozessvolumen, dem Bereich zwischen Elektrodenspitze und Gefäßboden, der dort stattfindenden Entladung ausgesetzt. Nach dem FRANKA-Prinzip (siehe DE 195 34 232) werden die zu fragmentierenden Stücke durch die Entladungswege durch sie hindurch einerseits explodiert und andrerseits durch Schockwelleneinwirkung zerschlagen. Die dabei von diesen Stromkanälen ausgehende Schockwelle breitet sich in die Umgebung aus und schlägt auf die Körper in ihrem Ausbreitungsweg ein. Die Entladungsfreuquenz wird durch die Aufladezeit für die Kondensatorbank nach oben begrenzt, ist aber darunter mit bekannten technischen Mitteln beliebig einstellbar. In einem Prototypversuch wurde beispielsweise mit einer Entladefrequenz von 10 Hz gefahren.The fragmented, initially more or less bulky Solid substances are under a supply line Addition of water poured into the reaction vessel (Figure 1), drop in it and are in the actual process volume, the area between electrode tip and vessel bottom, the discharge takes place there. According to the FRANKA principle (see DE 195 34 232) are to be fragmented Pieces through the discharge paths through them on the one hand exploded and smashed on the other hand by shock wave action. The thereby emerging from these current channels shockwave spreads into the environment and beats on the Body in its way of propagation. The discharge frequency gets up by the charging time for the capacitor bank but is limited by known technical means freely adjustable. For example, in a prototype attempt driven with a discharge frequency of 10 Hz.

Die Absaugvorrichtung an ihrem Beginn, insbesondere der Saugkorb dort, wird durch die bei der Entladung entstehende Schockwelle in der Prozessflüssigkeit gerüttelt und von den an seinem Netz haftende Fragmente befreit, die dann in das Entladevolumen zurücksinken, um mit der folgenden Entladung erneut der Fragmentierung ausgesetzt zu werden.The suction device at its beginning, in particular the suction basket there, is caused by the unloading Shock wave in the process liquid shaken and from the on freed its network fragments, which then in the discharge volume sink back to the next discharge again to be exposed to fragmentation.

Die Absaugkorb sitzt am Ende der Absaugvorrichtung (Anspruch 2), in dem die aus der Prozessflüssigkeit angesaugte Suspension zum Einlauf in die Sedimentwanne transportiert wird. Die Partikel setzen sich dort am Boden ab, und die von Schwebstoffen befreite Prozeßflüssigkeit wird schließlich wieder dem Reaktionsgefäß zugeführt. The Absaugkorb sits at the end of the suction device (claim 2), in which the aspirated from the process liquid suspension is transported to the inlet into the sediment tray. The Particles settle there on the ground, and those of suspended matter liberated process liquid is finally returned to the reaction vessel fed.

BezugszeichenlisteLIST OF REFERENCE NUMBERS ::

1. 1 .
Absaugeinrichtungsuction
2.Second
Reaktionsgefäßreaction vessel
3.Third
Prozessflüssigkeitprocess liquid
4.4th
zu fragmentierendes GutGood to be fragmented
5.5th
fragmentiertes Gutfragmented good
6.6th
AbsaugkorbAbsaugkorb
7.7th
SedimentierwanneSedimentierwanne
8.8th.
Leitungssystem mit FörderpumpenLine system with feed pumps

Claims (3)

  1. Shock wave-generating fragmentation system with a suction unit for removing fragmented material (5), consisting of:
    A reaction vessel (2) filled with a process liquid (3) up to a given level, into which the material to be fragmented (4) is introduced and in which this material is subjected at least once to a pulse-shaped fragmentation process, with the resulting dispersed, fragmented material (5) contained in the process liquid (3) being removed from the liquid by a suction unit (1), characterized by
    the suction unit (1) in the reaction vessel (2) being equipped with a suction basket at the end, which is enclosed by a meshed tissue, the mesh width corresponding to the maximum grain size to be removed, i. e. the undersized partide, and with the basket and the meshed tissue being made of a tough, shock wave-resistant material which prevents fragments of a larger grain size, the oversized particle, from passing, as a result of which these fragments fall back into the fragmentation volume under the impact of the incident shock wave and are subjected to the following fragmentation process again.
  2. Fragmentation system according to Claim 1, characterized by the meshed tissue being made of an electrically conductive material and being chemically inert to the process liquid (3).
  3. Fragmentation system according to Claim 1, characterized by the meshed tissue consisting of dielectric material and being chemically inert to the process liquid (3).
EP02004850A 2001-03-24 2002-03-04 Process of selectively separating particles from a suspension Expired - Lifetime EP1243339B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10114550 2001-03-24
DE10114550 2001-03-24

Publications (3)

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EP1243339A2 EP1243339A2 (en) 2002-09-25
EP1243339A3 EP1243339A3 (en) 2003-11-26
EP1243339B1 true EP1243339B1 (en) 2005-12-07

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AT (1) ATE311939T1 (en)
DE (1) DE50205148D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10144486C1 (en) * 2001-09-10 2003-04-24 Karlsruhe Forschzent Process for the continuous non-thermal digestion and pasteurization of industrial quantities of organic process material by electroporation and reactor to carry out the process
JP5963871B2 (en) * 2011-10-10 2016-08-03 ゼルフラーク アクチエンゲゼルシャフトｓｅｌＦｒａｇ ＡＧ Method of fragmenting and / or pre-weakening material using high voltage discharge
WO2015058312A1 (en) * 2013-10-25 2015-04-30 Selfrag Ag Method for fragmenting and/or pre-weakening material by means of high-voltage discharges
WO2015058311A1 (en) * 2013-10-25 2015-04-30 Selfrag Ag Method of fragmenting and/or weakening a material by means of high voltage discharges

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1169141A (en) * 1957-03-07 1958-12-23 Colloidal solution, manufacturing process and equipment
GB864178A (en) * 1959-01-09 1961-03-29 Malcolm Stewart Burgess Treatment of mineral substances and product obtained thereby
PL84385B1 (en) * 1973-01-11 1976-03-31 Polotechnika Wroclawska Breslau (Polen)
DE2847747C2 (en) * 1978-11-03 1986-04-30 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Device for collecting radioactive, dusty or powdery substances
GB2092885A (en) * 1982-01-14 1982-08-25 Gen Electric Underwater suction device for irradiated materials
EP0268019A1 (en) * 1986-11-13 1988-05-25 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Apparatus for disintegrating a fluid-suspended solid body
DE19534232C2 (en) 1995-09-15 1998-01-29 Karlsruhe Forschzent Process for comminuting and crushing solids conglomerated from non-metallic or partially metallic components and for comminuting homogeneous non-metallic solids

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Publication number Publication date
ATE311939T1 (en) 2005-12-15
EP1243339A2 (en) 2002-09-25
DE50205148D1 (en) 2006-01-12
EP1243339A3 (en) 2003-11-26

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