摘要:
Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zum Trennen eines Bruchgutes, bestehend aus gebrochenen Körnern oder Bohnen und ihren Schalen, insbesondere zur Trennung von Kakaobruch (Nibs) von Kakaobohnenschalen, wobei die Trennung elektrostatisch erfolgt, indem das Bruchgut in franktionierter Form in einer Aufladungszone zwischen zwei unterschiedlich geladenen Elektroden elektrisch aufgeladen, anschließend im freien Fall in einem von zwei anderen, die Freifallstrecke begrenzenden Elektroden erzeugten homogenen elektrischen Feld entladen und danach mittels eines mechanischen Separators in zwei getrennten Produktströmen, bestehend im wesentlichen aus einem Kernbruchstrom und einem Schalenstrom, weggefördert wird. Durch unterschiedlich starke Ablenkung der Bruchgutteilchen in der Ablenkzone wird der Kernbruch von den Schalen getrennt, wodurch mit einem relativ geringen apparatetechnischen Aufwand Trennergebnisse erzielbar sind, die bisher nur mit Hilfe von Sieb- und Windsichtvorrichtungen und damit kostspieligeren Apparaten erreicht wurden.
摘要:
The separator charges the particles to be separated and passes them through an alternating electric field which has a non-uniform intensity in a direction perpendicular to the forward direction, and which also has field lines curved in the same direction. The particles which move along the curved field lines due to their charge are thus subjected to a centrifugal force which effects their separation. The separator includes a pair of conductive electrodes, the first being substantially horizontal or possibly at an angle from the horizontal and the second mounted facing the first at a predetermined angle to it. The electrodes may be planar or curved. The field is supplied by an ac source operating in the range of 3 to 1000 hz. A mechanical vibrator attached to the first electrode imparts the forward motion to the particles.
摘要:
An electrostatic separator is obtained that can improve the efficiency of separating material fragments contained in a mixture. The electrostatic separator includes a transfer unit (130) and a counter electrode (180). The transfer unit (130) transfers a mixture (100) electrically charged, which is a target fed into an electrostatic field space to be separated according to a state of electrical charging. The transfer unit (130) includes an end portion (1) in a direction of transfer of the mixture (100). The counter electrode (180) faces the end portion (1). The counter electrode (180) can form an electric field between the end portion (1) and the counter electrode (180) upon application of a voltage. A first surface portion of the counter electrode (180) facing the end portion (1) has an area larger than an area of a second surface portion of the end portion (1) facing the counter electrode (180) and functioning as an electrode.
摘要:
An apparatus for electrostatically separating conductive particles and insulative particles which shows a shortening in separating time and in separating performance comprises an approximately flat bottom electrode (26) mounted below, an approximately flat mesh electrode (22) having many particle-penetrating openings (24) mounted above with a specified interval from the bottom electrode (26), and a DC power source connected to at least one of the mesh electrode (22) and the bottom electrode (24). A separating zone (10) is formed between the bottom electrode (22) and the mesh electrode (24) by impressing a voltage across both the electrodes.
摘要:
Particles having different properties (e.g. particulate fly ash and carbon) are separated by moving the particles forwards along a horizontal electrode plate (1) above which is mounted a second electrode (2) having two plates (4) each extending sideways from a central block (3) of dielectric material at an acute angle (a) to the horizontal. An alternating electric field is generated between the electrodes (1, 2) by a high voltage AC power source (14). The field lines (16) from each plate curve to the side and impart centrifugal forces to particles charged by friction or conductive induction, which forces separate lighter, more highly charged particles from the others. The separated particles are collected in bins (13) arranged around the lower electrode (1), which electrode is mounted on a vibratory transducer (12).
摘要:
Particles having different properties (e.g. particulate fly ash and carbon) are separated by driving the particles by means of a vibratory feeder (12) forwards along a horizontal electrode plate (1) above which is mounted a second electrode (2) having at least one plate (4) mounted at an acute angle (a) to the horizontal. Preferably, two plates (4) each extend sideways from a central block (3) of dielectric material. An alternating electric field is generated between the electrodes (1, 2) by a high voltage AC power source (14). The potential across each plate (4) varies (in particular, decreases) in the lateral direction, the variation being continuous or stepwise. The field lines (16) from each plate (4) curve to the side and impart centrifugal forces to particles charged by friction or conductive induction, which forces separate lighter, more heavily charged particles from the others. The separated particles are collected in bins (13) arranged around the lower electrode (1).
摘要:
Die Erfindung umfasst ein Verfahren zum Aussortieren von Feinpartikeln aus einem auf einer Oberfläche eines Trägerelementes angeordneten Partikelgemenge, das Partikel unterschiedlicher Größen, insbesondere Feinpartikel mit einem Durchmesser bis 1 mm, umfasst, dadurch gekennzeichnet, dass die Feinpartikel mittels eines elektrostatisch geladenen Separierelements wenigstens teilweise aus dem Partikelgemenge aussortiert werden.