Abstract:
A method of processing a liquid including (a) passing a flow of the liquid through a local constriction into an outlet channel, the flow of liquid having a velocity of at least 1.4 m/s at the exit end of the outlet channel, the flow of liquid in the outlet channel containing cavitation bubbles, and (b) collapsing the cavitation bubbles by subjecting the cavitation bubbles to a water hammer hydraulic pulse pressure resulting from periodically rapidly closing the outlet channel. A device for practicing the method is also disclosed.
Abstract:
A controlled cavitation reactor is disclosed that is particularly suited to the treatment of abrasive fluids and slurries with a minimum of erosion and mechanic failure caused by abrasion. The reactor includes a generally cylindrical housing having a peripheral wall that extends between end plates. A rotor is rotatably disposed in the housing and has at least one outer peripheral surface spaced from the peripheral wall to define a cavitation zone therebetween. A plurality of bores extends through the peripheral surface of the rotor. The rotor may be formed with central void zone between two lobes of the rotor with each lobe defining a separate cavitation zone with the peripheral wall of the housing. One or more inlet ports is arranged to introduce fluid to the housing tangentially and within one or more void zones. One or more exit ports is arranged to receive fluid from the housing tangentially within another void zone. As a result, fluid takes a spiral path into the housing, across the cavitation zone, and out of the housing. This greatly reduces sharp changes in direction and accordingly reduces abrasion and consequent damage.
Abstract:
A machine (1) for processing polymer materials has a rotor (2) rotatable around an axis of rotation (A); a stator (3) slidxngly and sealingly coupled with the rotor (2); at least one circumferential recess (7) which extends by an angle of less than 360° into the stator (3) and forms with the rotor (2) a processing channel (8) of the polymer material; at least one inlet channel (11) for feeding the polymer material to the processing channel (8); and an outlet channel (12) for evacuating the polymer material from the processing channel (8).
Abstract:
A dynamic mixer (50) comprising two mixing parts (51), (52) which are rotatable relative to each other about a predetermined axis of rotation R, each of said mixing parts having a mixing face, between which is defined a flow path which extends between an inlet (56) for material to be mixed and an outlet (57), each of said mixing faces comprising a series of annular steps centred on the predetermined axis of rotation, having a plurality of cavities formed therein, said cavities defining flow passages bridging adjacent steps on each of the two mixing parts, each of said mixing faces being mutually positionable such that the steps of one mixing part extend towards recesses formed be¬ tween the steps of the other mixing part, whereby cavities present in one mixing face are offset relative to, and overlap with, cavities present in the other mixing face in an axial direction or a transverse direction, such that material moving between the mixing faces of the two mixing parts from the inlet to the outlet is transferable between overlapping cavities, wherein at least one step of one of the mixing parts and at least one adjacent step of the other of the mixing parts extends further in the axial direction than in a transverse direction, or vice versa, such that at least one annular mixing zone of substantially uniform volume is provided between the two mixing parts.
Abstract:
Homogenisator (10) mit einem in eine Homogenisationskammer führenden Zufluss (20), einem aus der Homogenisationskammer führenden Abfluss (30), einem Stator (40) und einem zusammen mit dem Stator (40) Scherkräfte bewirkenden Rotorkopf (50), wobei Stator (40) und Rotorkopf (50) in der Homogenisationskammer angeordnet sind, einer mit dem Rotorkopf (50) verbundenen Rotorwelle (60), einem auf einem Rotorlagerträger (70) angeordneten, die Rotorwelle (60) lagernden Rotorlager, und einem die Rotorwelle antreibenden Motor (80), dadurch gekennzeichnet, dass der Rotorlagerträger (70) einen mit einem Zulauf (90a) und einem Ablauf (90b) versehenen Hohlraum (90) zur Aufnahme eines Wärmeträgers aufweist.
Abstract:
A distributive and dispersive mixing apparatus of the CDDM type comprising two confronting surfaces as being the inner surface of shell (4) and the outer surface of fixed cage (2)) and at least one cage-like member (3) disposed between the confronting surfaces said cage-like member (3) defining passages for fluid flow adjacent at least one of the confronting surfaces CHARACTERISED IN THAT the or at least one cage-like member (3) has a relative rotational movement but is not freely rotating relative to at least one of the confronting surfaces and/or at least one other cage-like member, and the bulk fluid flow within the mixing apparatus is in the plane of the surface of the or at least one cage-like member perpendicular to the direction of relative rotational movement.
Abstract:
Die Erfindung betrifft einen dynamischen Mischer für viskose Komponenten, insbesondere zum Mischen von Dentalmassen, mit einem Rotor (30) und einem Gehäuse (2), das vordere Einlassöffnungen (12, 13) für die Komponenten und mindestens eine hintere Auslassöffnung (20) aufweist und dessen Innenraum eine Vorkammer (17) und eine Hauptkammer (22) umfasst, wobei die Vorkammer (17) in einem distal sich verjüngenden Übergangsabschnitt (16) in die Hauptkammer (22) mündet. Zur präzisen Konzentrationsregelung der zu mischenden Komponenten der zugeführten Komponeten auch bei vorübergehenden Konzentrations Schwankungen derselben und zum Erreichen eines hohen Homogenisierungsgrads wird vorgeschlagen, dass der dynamische Mischer (1) mindestens einen Einzelkanal (23a-d) als Durchgang von der Vorkammer (17) in die Hauptkammer (22) aufweist, wobei sich die Breite des Einzelkanals (23a-d) über einen Teilumfang des Übergangsabschnitts (16) erstreckt.
Abstract:
Die Erfindung betrifft eine Rührvorrichtung für Belebtschlämme mit einem an einer Welle (1) angebrachten, eine hyperboloidartig geformte Wand (3) aufweisenden Rührkörper (2) und einer Luftzuführleitung (5, 8) zum Zuführen von Luft in eine an einer Unterseite des Rührkörpers (2) ausgebildete trichterartige Ausnehmung (6). Zur Verbesserung des Lufteintrags in das den Rührkörper (2) umgehende flüssige Medium wird erfindungsgemäß vorgeschlagen, dass eine an der Unterseite gebildete Öffnung der Ausnehmung (6) mit einem Abdeckelement (7) derart abgedeckt ist, dass zwischen einer äußeren Umfangs fläche (9) des Rührkörpers (2) und dem Abdeckelement (7) ein Ringspalt (10) mit einer vorgegebenen Breite frei bleibt, und dass die Luftzuführleitung (8) koaxial bezüglich der Welle (1) durch das Abdeckelement (7) geführt ist.
Abstract:
A mixing device (100) for mixing a first and second material together to create an output mixture. The device includes a first chamber (310) containing the first material coupled to a mixing chamber (330) defined between a rotor (600) and a stator (700). The rotor is disposed inside the stator and rotates therein about an axis of rotation. The first chamber houses an internal pump (410) configured to pump the first material from the first chamber into the mixing chamber. At least one of the rotor and stator have a plurality of through-holes (608, 708) through which the second material is provided to the mixing chamber. Optionally, a second chamber (320) coupled to the mixing chamber. The second chamber may house an internal pump (420) configured to pump the output material fro the mixing chamber into the second chamber.
Abstract:
The invention relates to devices for the analysis of liquid samples, comprising a rotationally symmetrical rotor (1) which may be placed in a sample container (11), wherein an annular gap (32) is provided between the sample container (11) and the rotor (1). Said rotor (1) comprises at least one flow channel (7) for the transport of liquids and/or gases into and/or out of the sample container (11), wherein means for centered mounting of the rotor (1) are provided on the rotor (1).