EP0000512A1 - Agitateur hélicoidal auto-portant - Google Patents

Agitateur hélicoidal auto-portant Download PDF

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Publication number
EP0000512A1
EP0000512A1 EP78100383A EP78100383A EP0000512A1 EP 0000512 A1 EP0000512 A1 EP 0000512A1 EP 78100383 A EP78100383 A EP 78100383A EP 78100383 A EP78100383 A EP 78100383A EP 0000512 A1 EP0000512 A1 EP 0000512A1
Authority
EP
European Patent Office
Prior art keywords
spiral
hub
stirrer
helix
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.)
Granted
Application number
EP78100383A
Other languages
German (de)
English (en)
Other versions
EP0000512B1 (fr
Inventor
Wolfgang Lenart
Wolfgang Dr. Rau
Hubertus Dr. Baron
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0000512A1 publication Critical patent/EP0000512A1/fr
Application granted granted Critical
Publication of EP0000512B1 publication Critical patent/EP0000512B1/fr
Expired legal-status Critical Current

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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
    • 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 with a plurality of spiral windings consisting of hollow sections, the lower end of which, facing the bottom of the stirring container, is transferred into a hub which in turn is seated on a drive shaft leading downwards through the bottom of the stirring container.
  • the stirrer is used to mix a bed of bulk goods which is moved in vertical cylindrical containers.
  • the mixing of the bulk material 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 by the bulk material causes the solid to circulate vertically, with the bulk material being conveyed upwards and downwards in the middle of the bed. It is difficult to carry out mixing and stirring processes in powder layers, especially if the product in powder form 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 P u lverbettes a good distribution of catalyst, monomeric gas and cooling gas be guaranteed so that no local overheating occurs. This would lead to melting and sintering of the product powder and thus to disturbances in the production process due to product approaches on the container wall, on the stirrer and due to agglomerates in the bulk material bed.
  • a distributor spiral is arranged in the region of the transition from the hub to the first turn of the helix, which deflects the fresh and cooling gas stream fed into the reactor along the stirrer shaft and immediately into the existing circulation circuit of the solid distributed.
  • 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 on the hub influences the critical flow zone that occurs there through its eccentricity in a positive sense by disturbing the quiet zone that forms 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 deflect the fresh and cooling gas stream entering a gap between the stirrer shaft 4 and the stirrer shaft bore and distributing it immediately over the entire cross section of the container 3. It expediently consists of a triangular hollow profile tapering counter to the direction of rotation is wound spirally around the hub 2.
  • 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 helix 1 denotes the free spiral outlet, the cross section of which tapers outwards over a range from 90 to 120 ° C. causes a vortex-free flow pattern on the bed surface and thus also counteracts growth.
  • bulkhead plates 8 and 9 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.

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)
EP78100383A 1977-07-21 1978-07-12 Agitateur hélicoidal auto-portant Expired EP0000512B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7722777U 1977-07-21
DE7722777U DE7722777U1 (de) 1977-07-21 1977-07-21 Frei tragender wendelruehrer

Publications (2)

Publication Number Publication Date
EP0000512A1 true EP0000512A1 (fr) 1979-02-07
EP0000512B1 EP0000512B1 (fr) 1981-01-28

Family

ID=6680939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100383A Expired EP0000512B1 (fr) 1977-07-21 1978-07-12 Agitateur hélicoidal auto-portant

Country Status (5)

Country Link
EP (1) EP0000512B1 (fr)
JP (1) JPS5423258A (fr)
AT (1) AT375278B (fr)
DE (2) DE7722777U1 (fr)
IT (1) IT1107491B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3710965A1 (de) * 1987-04-01 1988-10-13 Lias Franken Leichtbau Gmbh Vorrichtung zum mischen von stoffen
EP0865820A1 (fr) * 1997-03-17 1998-09-23 Basf Aktiengesellschaft Réacteur pour conversions chimiques
US6114478A (en) * 1996-12-19 2000-09-05 Basf Aktiengesellschaft Gas-phase polymerization of C2 -C8 -alk-l-enes by means of Ziegler-Natta or metallocene catalyst systems
US6174969B1 (en) 1997-07-02 2001-01-16 Basf Aktiengesellschaft Polymerization of C2-C8-alk-1-enes by means of a Ziegler-Natta
EP1135983A1 (fr) * 2000-03-17 2001-09-26 SANCASSIANO S.p.A. Pétrin de type en spirale avec cuve non-rotative pour la préparation de mélanges à base de farine
US6881801B2 (en) 2001-03-05 2005-04-19 Basell Polyolefine Gmbh Method for feeding catalysts
WO2008099180A1 (fr) 2007-02-16 2008-08-21 Brunob Ii B. V. Appareil et procédés de mélange et de distribution d'échantillons liquides ou pulvérulents
US7527175B2 (en) 2001-02-02 2009-05-05 Basell Polyolefine Gmbh Metering of catalysts
EP2384847A1 (fr) * 2010-05-04 2011-11-09 SANCASSIANO S.p.A. Réservoir pour pétrisseur
CN111394228A (zh) * 2020-04-09 2020-07-10 王佳天 一种节能环保的医用细菌振荡培养系统及方法
WO2023117048A1 (fr) * 2021-12-20 2023-06-29 Wacker Chemie Ag Mise en contact de fines particules avec une phase gazeuse dans un réacteur à lit agité

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT348953B (de) * 1977-08-26 1979-03-12 Alfa Laval Stalltech Vorrichtung zur begasung und umwaelzung von fluessigkeiten
DE19549586C2 (de) * 1995-12-18 2001-02-15 Graefe Ingeborg Mischwerkzeug für einen Mischer
DE102018107958A1 (de) * 2018-04-04 2019-10-10 Clever-Cut GmbH Mischvorrichtung
CN111659284A (zh) * 2020-05-25 2020-09-15 安徽方园塑胶有限责任公司 一种便于均匀配浆的多叠筛机用料浆分料器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE131726C (fr) *
DE1218265B (de) * 1962-08-01 1966-06-02 Basf Ag Wendelruehrer
DE1442688A1 (de) * 1963-11-28 1968-11-21 Bayer Ag Vorrichtung zur Behandlung von viskosen Fluessigkeiten und pulverfoermigen Massen
DE1507505A1 (de) * 1966-07-16 1969-04-03 Draiswerke Gmbh Ruehrwerksmuehle
US3920223A (en) * 1973-07-05 1975-11-18 Wallace F Krueger Plural component mixing head

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE131726C (fr) *
DE1218265B (de) * 1962-08-01 1966-06-02 Basf Ag Wendelruehrer
DE1442688A1 (de) * 1963-11-28 1968-11-21 Bayer Ag Vorrichtung zur Behandlung von viskosen Fluessigkeiten und pulverfoermigen Massen
DE1507505A1 (de) * 1966-07-16 1969-04-03 Draiswerke Gmbh Ruehrwerksmuehle
US3920223A (en) * 1973-07-05 1975-11-18 Wallace F Krueger Plural component mixing head

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3710965A1 (de) * 1987-04-01 1988-10-13 Lias Franken Leichtbau Gmbh Vorrichtung zum mischen von stoffen
US6114478A (en) * 1996-12-19 2000-09-05 Basf Aktiengesellschaft Gas-phase polymerization of C2 -C8 -alk-l-enes by means of Ziegler-Natta or metallocene catalyst systems
EP0865820A1 (fr) * 1997-03-17 1998-09-23 Basf Aktiengesellschaft Réacteur pour conversions chimiques
US6174969B1 (en) 1997-07-02 2001-01-16 Basf Aktiengesellschaft Polymerization of C2-C8-alk-1-enes by means of a Ziegler-Natta
EP1135983A1 (fr) * 2000-03-17 2001-09-26 SANCASSIANO S.p.A. Pétrin de type en spirale avec cuve non-rotative pour la préparation de mélanges à base de farine
US6533448B1 (en) 2000-03-17 2003-03-18 Sancassiano Spa Spiral-type kneading machine with a non-rotating bowl for the preparation of flour-based mixtures
US7527175B2 (en) 2001-02-02 2009-05-05 Basell Polyolefine Gmbh Metering of catalysts
US6881801B2 (en) 2001-03-05 2005-04-19 Basell Polyolefine Gmbh Method for feeding catalysts
WO2008099180A1 (fr) 2007-02-16 2008-08-21 Brunob Ii B. V. Appareil et procédés de mélange et de distribution d'échantillons liquides ou pulvérulents
AU2008215918B2 (en) * 2007-02-16 2012-05-17 Corn Products Development, Inc. Apparatus for and methods of mixing and dispensing liquid or powdery samples
EP2384847A1 (fr) * 2010-05-04 2011-11-09 SANCASSIANO S.p.A. Réservoir pour pétrisseur
CN111394228A (zh) * 2020-04-09 2020-07-10 王佳天 一种节能环保的医用细菌振荡培养系统及方法
WO2023117048A1 (fr) * 2021-12-20 2023-06-29 Wacker Chemie Ag Mise en contact de fines particules avec une phase gazeuse dans un réacteur à lit agité

Also Published As

Publication number Publication date
DE2860367D1 (en) 1981-03-19
JPS5423258A (en) 1979-02-21
JPS6114853B2 (fr) 1986-04-21
IT7850315A0 (it) 1978-07-14
IT1107491B (it) 1985-11-25
ATA527978A (de) 1983-12-15
AT375278B (de) 1984-07-25
EP0000512B1 (fr) 1981-01-28
DE7722777U1 (de) 1977-11-03

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