EP0000512B1 - Self-supporting helical coil type stirrer - Google Patents
Self-supporting helical coil type stirrer Download PDFInfo
- Publication number
- EP0000512B1 EP0000512B1 EP78100383A EP78100383A EP0000512B1 EP 0000512 B1 EP0000512 B1 EP 0000512B1 EP 78100383 A EP78100383 A EP 78100383A EP 78100383 A EP78100383 A EP 78100383A EP 0000512 B1 EP0000512 B1 EP 0000512B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spiral
- stirrer
- hub
- distributor
- self
- 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.)
- Expired
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
- B01J8/10—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles or endless belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
- B01F27/1142—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections of the corkscrew type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/808—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers driven from the bottom of the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
- B01F27/921—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws with helices centrally mounted in the receptacle
- B01F27/9213—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws with helices centrally mounted in the receptacle the helices having a diameter only slightly less than the diameter of the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F35/32—Driving arrangements
- B01F35/321—Disposition of the drive
- B01F35/3213—Disposition of the drive at the lower side of the axis, e.g. driving the stirrer from the bottom of a receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/20—Stationary reactors having moving elements inside in the form of helices, e.g. screw reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/18—Details relating to the spatial orientation of the reactor
- B01J2219/185—Details relating to the spatial orientation of the reactor vertical
Definitions
- the invention relates to a self-supporting spiral stirrer for mixing powdered bulk materials, with a plurality of spiral turns consisting of hollow profiles, the lower end of which, facing the bottom of the stirred tank, is transferred into a hub, one which starts from the hub and is perpendicular to the first spiral turn Distributor spiral, which, in the area of the transition from the hub to the first turn of the helix, is arranged around the hub, and a drive shaft leading downwards through the bottom of the mixing container, on which the hub rests.
- the dynamic movement of bulk goods by means of a spiral stirrer essentially depends on the number of spiral turns, the spiral pitch, the spiral width, the speed of the stirrer and the type of bulk material.
- the spiral stirrer covered in the stirring bed of bulk material causes the solid to circulate vertically, with the bulk material being conveyed downwards from the outside in the middle of the bed.
- Mixing and stirring processes in powder layers are particularly difficult when powdery product is continuously simulated by polymerization from the gas phase, as is the case, for example, with the continuous gas-phase polymerization of propylene and ethylene. In these processes, a good distribution of catalyst, monomeric gas and cooling gas must be ensured by continuous circulation of the entire powder bed, so that no local overheating occurs. These would lead to melting and sintering of the product powder and thus to disruptions in the production process due to product approaches on the container wall, on the stirrer and due to agglomerates in the bulk material bed.
- the distributor spiral is arranged horizontally between the hub and the first turn of the helix, which deflects and distributes a fresh and cooling gas stream which is guided along the stirrer shaft into the stirred tank.
- the connection between the helix and the hub is designed in such a way that there are no currentless zones on the lee side of the connection.
- an asymmetrically designed cone is attached to the hub, which has a positive effect on the critical flow zone occurring there due to its eccentricity, by disrupting the rest zone forming there and thus preventing disruptive agglomerates.
- the helix tapers outwards at its free end in a wedge shape. This measure eliminates the formation of a vortex trail or loosening point at the stirrer end sliding through the powder layer, so that product batches which preferably occur in such areas are avoided.
- the stirrer is designed in the form of a self-supporting helix 1 with several, advantageously 3 to 5 turns, which is transferred at its lower end via a distributor spiral 6 into a hub 2.
- the distributor spiral serves to redirect the fresh and cooling gas stream entering a gap between stirrer shaft 4 and stirrer shaft bore and its immediate distribution over the entire cross section of container 3. It expediently consists of a triangular hollow profile tapering counter to the direction of rotation is guided approximately horizontally between the hub 2 and the first turn of the helix 1 around the hub.
- the hub 2 is provided with an asymmetrical cone 7, the eccentricity of which advantageously corresponds to approximately half the shaft diameter. This effectively prevents product growth in this low-flow zone.
- the free spiral outlet is designated by 5, the cross section of which tapers outwards over a range of 90 to 120 ° C. causes a vortex-free flow pattern on the bed surface and thus also counteracts growth.
- bulkhead plates 8 which are welded on all sides to the corresponding profile walls on their end faces, the helix 1 is additionally given an extraordinary buckling strength, in particular under extreme loads, such as pressure changes during rapid relaxation processes.
- partition plates 9 can also be attached in the distributor spiral, as a result of which the helical stirrer gains overall stability.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
Die Erfindung bezieht sich auf einen frei tragenden Wendelrührer zum Durchmischen von pulverförmigen Schüttgütern, mit mehreren aus Hohlprofilen bestehenden Wendelwindungen, deren unteres, dem Boden des Rührbehälters zugewandtes Ende, in eine Nabe übergeführt ist, einer von der Nabe ausgehenden und senkrecht auf der ersten Wendelwindung stehenden Verteilerspirale, die, im Bereich des Überganges von der Nabe zu ersten Windung der Wendel, um die Nabe angeordnet ist, sowie einer nach unten, durch den Boden des Rührbehälters führenden Antriebswelle, auf der die Nabe aufsitzt.The invention relates to a self-supporting spiral stirrer for mixing powdered bulk materials, with a plurality of spiral turns consisting of hollow profiles, the lower end of which, facing the bottom of the stirred tank, is transferred into a hub, one which starts from the hub and is perpendicular to the first spiral turn Distributor spiral, which, in the area of the transition from the hub to the first turn of the helix, is arranged around the hub, and a drive shaft leading downwards through the bottom of the mixing container, on which the hub rests.
Die Durchmischung eines in vertikalen zylin- . drischen Behältern bewegten Schüttgutes mittels Wendelrührer hängt im wesentlichen von der Anzahl der Wendelwindungen, der Wendelsteigung, der Wendelbreite, der Drehzahl des Rührers und der Art des Schüttgutes ab. Der im Rührbett von Schüttgut bedeckte Wendelrührer bewirkt eine Vertikalumwälzung des Feststoffes, wobei das Schüttgut außen nach oben in der Bettmitte nach unten gefördert wird. Schwierig sind Mischund Rührvorgänge in Pulverschichten insbesondere dann durchzuführen, wenn ständig pulverförmiges Produkt durch Polymerisation aus der Gasphase nachgebildet wird, wie es beispielsweise bei der kontinuierlichen Gasphasen-Polymerisation von Propylen und Äthylen der Fall ist. Bei diesen Verfahren muß durch städige Umwälzung des gesamten Pulverbettes eine gute Verteilung von Katalysator, monomerem Gas und Kühlgas gewährleistet sein, so daß keine lokalen Überhitzungen auftreten. Diese Würden zum Schmelzen und Sintern des Produktpulvers führen und damit zu Störungen im Produktionsablauf durch Produktansätze an der Behälterwand, am Rührer und durch Agglomerate im Schüttgutbett.Mixing one in vertical cylinder. The dynamic movement of bulk goods by means of a spiral stirrer essentially depends on the number of spiral turns, the spiral pitch, the spiral width, the speed of the stirrer and the type of bulk material. The spiral stirrer covered in the stirring bed of bulk material causes the solid to circulate vertically, with the bulk material being conveyed downwards from the outside in the middle of the bed. Mixing and stirring processes in powder layers are particularly difficult when powdery product is continuously simulated by polymerization from the gas phase, as is the case, for example, with the continuous gas-phase polymerization of propylene and ethylene. In these processes, a good distribution of catalyst, monomeric gas and cooling gas must be ensured by continuous circulation of the entire powder bed, so that no local overheating occurs. These would lead to melting and sintering of the product powder and thus to disruptions in the production process due to product approaches on the container wall, on the stirrer and due to agglomerates in the bulk material bed.
Zur Darstellung der Erfindungs-Gattung ist von einem bekannten Wendelrührer im Sinne der DE-PS 12 18 265 ausgegangen, mit dem bisher bei kleineren Reaktoren ein störungsfrier Polymerisationsablauf möglich war. Beim Übergang auf größere Polymerisationsreaktoren, beispielsweise > 10 m3 Inhalt, hat es sich jedoch gezeigt, daß solche Rührer für einen störungsfreien Dauerbetrieb nicht in jeder Hinsicht befriedigen. Insbesondere im Bereich der Rührernabe und des Leitbleches ergeben sich Produktansätze, die sich gelegentlich ablösen und beim Produktaustrag aus dem Reaktor zu Verstopfungen und damit zu Produktionsunterbrechungen führen. Es sind außerdem größere Produktknollen zu beobachten, die offenbar zwischen Reaktorboden und dem Produktaufnahmebereich des Rührers entstehen. Auch am im Schüttbett getauchten Rührerende kommt es zu Produktansätzen. Diese Erscheinungen sind auf ungenügende oder gestörte Mischverhältnisse zurückzuführen und haben primär im Nabenbereich des Rührers, in dem die Umlenkung des umzuwälzenden Schüttgutes erfolgt, ihre Ursache, da dort die Strömungsverhältnisse durch komplexe Druck-und Scherspannungen negativ beeinflußt werden. Besonders gravierend sind diese Nachteile, wenn dem Reaktor entlang der Rührwelle über einen Spaltring z.B. Äthylen oder Propylen zur Polymerisation und gleichzeitigen Wärmeabfuhr zugeführt wird. Die geforderte gleichmäßige Gasverteilung des am Reaktorboden eintretenden Gases, das beispielsweise im Falle von Äthylen oder Propylen ganz oder teilweise verflüssigt sein kann und zur Polymerisation und Wärmeabfuhr gleichmäßig über das Schüttgut verteilt werden muß um Konzentrationsunterschiede weitgehend auszugleichen und lokale Überhitzungen zu verhindern, ist bei dem bekannten Wendelrührer nicht gewährleistet.To illustrate the type of invention, a known spiral stirrer in the sense of DE-PS 12 18 265 was used, with which a trouble-free polymerization process was previously possible with smaller reactors. When switching to larger polymerization reactors, for example> 10 m 3 content, it has been shown that such stirrers are not satisfactory in all respects for trouble-free continuous operation. In the area of the stirrer hub and the baffle, in particular, there are product batches that occasionally come off and lead to blockages when the product is discharged from the reactor and thus to production interruptions. There are also larger product bulbs to be observed, which apparently arise between the reactor base and the product receiving area of the stirrer. Product approaches also occur at the end of the stirrer immersed in the bed. These phenomena are due to inadequate or disturbed mixing conditions and are primarily caused in the hub area of the stirrer, in which the bulk material to be circulated is deflected, since there the flow conditions are negatively influenced by complex pressure and shear stresses. These disadvantages are particularly serious if, for example, ethylene or propylene is fed to the reactor along the agitator shaft via a split ring for polymerization and simultaneous heat dissipation. The required uniform gas distribution of the gas entering the reactor bottom, which, for example in the case of ethylene or propylene, can be completely or partially liquefied and must be distributed evenly over the bulk material for polymerization and heat dissipation in order to largely compensate for differences in concentration and to prevent local overheating Helix not guaranteed.
Es war daher Aufgabe der Erfindung, einen frei tragenden Wendelrührer so zu gestalten, daß die vorgenannten Nachteile nicht auftreten können.It was therefore an object of the invention to design a self-supporting spiral stirrer in such a way that the aforementioned disadvantages cannot occur.
Diese Aufgabe wurde erfindungsgemäß dadurch gelöst, daß die Verteilerspirale zwischen Nabe und erster Windung der Wendel waagerecht angeordnet ist, welche einen entlang der Rührerwelle in den Rührbehälter geführten Frisch- und Kühlgasstrom umlenkt und verteilt. Der Anschluß zwischen Wendel und Nabe ist dabei so gestaltet, daß auf der Lee-Seite des Anschlusses keine strömungslosen Zonen entstehen.This object has been achieved according to the invention in that the distributor spiral is arranged horizontally between the hub and the first turn of the helix, which deflects and distributes a fresh and cooling gas stream which is guided along the stirrer shaft into the stirred tank. The connection between the helix and the hub is designed in such a way that there are no currentless zones on the lee side of the connection.
In einer bevorzugten Ausführungsform des erfindungsgemäßen Wendelrührers ist auf der Nabe ein asymmetrisch ausgebildeter Kegel angebracht, der die dort auftretende kritische Strömungszone durch seine Exzentrizität in positivem Sinne beeinflußt, indem er die dort sich ausbildende Rühezone stört und damit störende Agglomerate verhindert.In a preferred embodiment of the spiral stirrer according to the invention, an asymmetrically designed cone is attached to the hub, which has a positive effect on the critical flow zone occurring there due to its eccentricity, by disrupting the rest zone forming there and thus preventing disruptive agglomerates.
Nach einem weiteren vorteilhaften Merkmal der der Erfindung verjüngt sich die Wendel an ihrem freien Ende keilförmig nach außen. Durch diese Maßnahme wird die Ausbildung einer Wirbelschleppe bzw. Lockerstelle an dem durch die Pulverschicht gleitenden Rührerende ausgeschaltet, so daß Produktansätze, die vorzugsweise in solchen Bereichen entstehen, vermieden werden.According to a further advantageous feature of the invention, the helix tapers outwards at its free end in a wedge shape. This measure eliminates the formation of a vortex trail or loosening point at the stirrer end sliding through the powder layer, so that product batches which preferably occur in such areas are avoided.
Es wurde des weiteren gefunden, daß reine Hohlprofile als Wendelquerschnitt, gleich welcher Art von Querschnittsgestaltung, bei Rührergrößen etwa ab 1 400 mm Außendurchmesser und Rührerwellendrehmomenten ab 800 daNm, die besonders hinsichtlich Beul-Steifigkeit des außerdem durch kurzfristige Druckunterschiede von mindestens 25 bar beaufschlagten Rührers, den Anforderungen eines freitragenden Wendelrührers nicht mehr genügen. Dieser Nachteil wird in einer weiteren Ausbildung der Erfindung dadurch umgangen, daß der hohle Wendelquerschnitt mit Schottblechen versehen ist, welche etwa im Abstand einer Wendelblattbreite angebracht sind. Diese Möglichkeit ergibt sich durch segmentförmigen Aufbau der Wendel, d.h., die Wendel besteht aus aneinandergereihten Kastenabschnitten.It was also found that pure hollow profiles as helical cross-section, regardless of the type of cross-sectional design, with stirrer sizes from about 1,400 mm outside diameter and stirrer shaft torques from 800 daNm, which are particularly important with regard to buckling stiffness of the stirrer, which is also subjected to short-term pressure differences of at least 25 bar. no longer meet the requirements of a self-supporting spiral mixer. This disadvantage is further explained Formation of the invention circumvented in that the hollow helical cross-section is provided with bulkhead plates which are attached approximately at a distance from one helical blade width. This possibility results from the segmental structure of the helix, ie the helix consists of box sections lined up.
Auf diese Weise ausgebildete Wendel ermöglichen den Einsatz in besonders großen Rührbehältern. So konnte beispielsweise bei einem frei tragenden Wendelrührer mit einem Außendurchmesser D von 2 650 mm, einer Seigung S von 1 000 mm, 3,75 Windungen und einer Blattbreite b von 400 mm selbst bei Rührerwellendrehmomenten von 6 000 daNm außerordentliche Formstabilität festgestellt werden. Mit Blechen einer Dicke von 12 bis 14 mm ist dabei ein vergleichsweise leichter Wendelrührer herstellbar, der zudem den Vorteil geringer Beanspruchung durch Trägheitskräfte aufweist.Spirals designed in this way enable use in particularly large stirred containers. For example, with a self-supporting spiral stirrer with an outer diameter D of 2,650 mm, a pitch S of 1,000 mm, 3.75 turns and a blade width b of 400 mm, extraordinary dimensional stability could be determined even with stirrer shaft torques of 6,000 daNm. A sheet of a thickness of 12 to 14 mm can be used to produce a comparatively light spiral stirrer, which also has the advantage of less stress due to inertial forces.
Eine beispielhafte Ausführungsform des erfindungsgemäßen Wendelrührers ist in den Zeichnungen - Figur 1 bis Figur 3 - schematisch dargestellt und im folgenden näher erläutert.An exemplary embodiment of the spiral stirrer according to the invention is shown schematically in the drawings - FIGS. 1 to 3 and is explained in more detail below.
Es zeigt
- Figur 1 den in einen Rührbehälter eingebauten Rührer
Figur 2 eine Draufsicht des in Figur 1 dargestellten Wendelrührers in der Ebene A-B und- Figur 3 ein Seitenansicht in der Ebene C-D.
- 1 shows the stirrer installed in a stirred tank
- Figure 2 is a plan view of the spiral stirrer shown in Figure 1 in the plane AB and
- Figure 3 is a side view in the plane CD.
Gemäß Figur 1 ist der Rührer in Form einer frei tragenden Wendel 1 mit mehreren, vorteilhaft 3 bis 5 Windungen ausgebildet, die an ihrem unteren Ende über eine Verteilerspirale 6 in eine Nabe 2 übergeführt ist.According to FIG. 1, the stirrer is designed in the form of a self-supporting helix 1 with several, advantageously 3 to 5 turns, which is transferred at its lower end via a
Die Verteilerspirale dient der Umlenkung des senkrecht nach oben gerichteten, in einem zwischen Rührerwelle 4 und Rührerwellenbohrung befindlichen Spalt eintretenden Frisch-und Kühlgasstromes und dessen sofortiger Verteilung über den gesamten Querschnitt des Behälters 3. Sie besteht zweckmäßigerweise aus einem entgegen der Drehrichtung sich verjüngenden dreieckförmigen Hohlprofil und ist zwischen Nabe 2 und der ersten Windung der Wendel 1 etwa waagerecht um die Nabe gefuhrt.The distributor spiral serves to redirect the fresh and cooling gas stream entering a gap between
Die Nabe 2 ist mit einem asymmetrischen Kegel 7 versehen, dessen Exzentrizität vorteilhaft etwa dem halben Wellendurchmesser entspricht. Hierdurch werden Produktanwachsungen in dieser strömungsarmen Zone wirksam verhindert.The
Mit 5 ist der frei Wendelauslauf bezeichnet, dessen nach außen über einen Bereich von 90 bis 120°C sich verjüngender Querschnitt einen wirbelfreien Strömungsverlauf an der Bettoberfläche bewirkt und damit ebenfalls Anwachsungen entgegenwirkt. Durch Schottbleche 8, welche an ihren Stirnseiten allseitig mit den entsprechenden Profilwänden verschweißt sind, erhält die Wendel 1 zusätzlich eine außerordentliche Beul-Festigkeit, insbesondere bei extremen Belastungen, wie Druckwechsel bei raschen Entspannvorgängen. Gegebenenfalls können auch Schottbleche 9 in der Verteilerspirale angebracht sein, wodurch der Wendelrührer insgesamt an Stabilität gewinnt.The free spiral outlet is designated by 5, the cross section of which tapers outwards over a range of 90 to 120 ° C. causes a vortex-free flow pattern on the bed surface and thus also counteracts growth. By means of bulkhead plates 8, which are welded on all sides to the corresponding profile walls on their end faces, the helix 1 is additionally given an extraordinary buckling strength, in particular under extreme loads, such as pressure changes during rapid relaxation processes. If necessary,
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE7722777U | 1977-07-21 | ||
| DE7722777U DE7722777U1 (en) | 1977-07-21 | 1977-07-21 | FREELY CARRYING MIXER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0000512A1 EP0000512A1 (en) | 1979-02-07 |
| EP0000512B1 true EP0000512B1 (en) | 1981-01-28 |
Family
ID=6680939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP78100383A Expired EP0000512B1 (en) | 1977-07-21 | 1978-07-12 | Self-supporting helical coil type stirrer |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0000512B1 (en) |
| JP (1) | JPS5423258A (en) |
| AT (1) | AT375278B (en) |
| DE (2) | DE7722777U1 (en) |
| IT (1) | IT1107491B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT348953B (en) * | 1977-08-26 | 1979-03-12 | Alfa Laval Stalltech | DEVICE FOR GASIFICATION AND CIRCULATION OF LIQUIDS |
| DE3710965A1 (en) * | 1987-04-01 | 1988-10-13 | Lias Franken Leichtbau Gmbh | Apparatus for mixing substances |
| DE19547220C2 (en) * | 1995-12-18 | 1999-04-22 | Graefe Ingeborg | Solids mixer |
| DE19653079A1 (en) * | 1996-12-19 | 1998-06-25 | Basf Ag | Process for the gas phase polymerization of C¶2¶-C¶8¶-Alk-1-enes using Ziegler-Natta or metallocene catalyst systems |
| DE19711020A1 (en) * | 1997-03-17 | 1998-09-24 | Basf Ag | Polymerization reactor |
| DE19728141A1 (en) | 1997-07-02 | 1999-01-07 | Basf Ag | Process for the polymerization of C2-C8-Alk-1-enes using a Ziegler-Natta catalyst system |
| ES2194826T3 (en) | 2000-03-17 | 2003-12-01 | Sancassiano Spa | MASS MACHINE OF SPIRAL TYPE PROVIDED WITH A NON-ROTATING BOWL TO PREPARE MIXES BASED ON FLOUR. |
| DE10105276A1 (en) | 2001-02-02 | 2002-08-08 | Basell Polypropylen Gmbh | Process for dosing catalysts |
| DE10110551A1 (en) | 2001-03-05 | 2002-09-12 | Basell Polypropylen Gmbh | Process for dosing catalysts |
| GB0703053D0 (en) | 2007-02-16 | 2007-03-28 | Ici Plc | Apparatus for and Methods of Mixing and Dispensing Samples |
| EP2384847B1 (en) * | 2010-05-04 | 2018-07-04 | SANCASSIANO S.p.A. | Tank for kneading machine |
| DE102018107958A1 (en) * | 2018-04-04 | 2019-10-10 | Clever-Cut GmbH | mixing device |
| CN111394228A (en) * | 2020-04-09 | 2020-07-10 | 王佳天 | Energy-saving and environment-friendly medical bacteria shaking culture system and method |
| CN111659284A (en) * | 2020-05-25 | 2020-09-15 | 安徽方园塑胶有限责任公司 | Slurry distributor for multi-stack screening machine convenient for uniform slurry distribution |
| KR20240033071A (en) * | 2021-12-20 | 2024-03-12 | 와커 헤미 아게 | Contact of gas phase with particulates in stirred bed reactor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE131726C (en) * | ||||
| DE1218265B (en) * | 1962-08-01 | 1966-06-02 | Basf Ag | Wendelruehrer |
| DE1442688A1 (en) * | 1963-11-28 | 1968-11-21 | Bayer Ag | Device for the treatment of viscous liquids and powdery masses |
| DE1507505A1 (en) * | 1966-07-16 | 1969-04-03 | Draiswerke Gmbh | Agitator mill |
| US3920223A (en) * | 1973-07-05 | 1975-11-18 | Wallace F Krueger | Plural component mixing head |
-
1977
- 1977-07-21 DE DE7722777U patent/DE7722777U1/en not_active Expired
-
1978
- 1978-07-12 DE DE7878100383T patent/DE2860367D1/en not_active Expired
- 1978-07-12 EP EP78100383A patent/EP0000512B1/en not_active Expired
- 1978-07-14 IT IT50315/78A patent/IT1107491B/en active
- 1978-07-18 JP JP8683378A patent/JPS5423258A/en active Granted
- 1978-07-20 AT AT0527978A patent/AT375278B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6114853B2 (en) | 1986-04-21 |
| IT7850315A0 (en) | 1978-07-14 |
| EP0000512A1 (en) | 1979-02-07 |
| JPS5423258A (en) | 1979-02-21 |
| ATA527978A (en) | 1983-12-15 |
| DE2860367D1 (en) | 1981-03-19 |
| IT1107491B (en) | 1985-11-25 |
| DE7722777U1 (en) | 1977-11-03 |
| AT375278B (en) | 1984-07-25 |
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