EP0761295A1 - Mélangeur-pétrisseur - Google Patents

Mélangeur-pétrisseur Download PDF

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Publication number
EP0761295A1
EP0761295A1 EP96113975A EP96113975A EP0761295A1 EP 0761295 A1 EP0761295 A1 EP 0761295A1 EP 96113975 A EP96113975 A EP 96113975A EP 96113975 A EP96113975 A EP 96113975A EP 0761295 A1 EP0761295 A1 EP 0761295A1
Authority
EP
European Patent Office
Prior art keywords
elements
disc
foot
shaft
kneading
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.)
Withdrawn
Application number
EP96113975A
Other languages
German (de)
English (en)
Inventor
Pierre Liechti
Alfred Kunz
Jörg List
Daniel Arnaud
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.)
List AG
Original Assignee
List AG
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 List AG filed Critical List AG
Publication of EP0761295A1 publication Critical patent/EP0761295A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/707—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms the paddles co-operating, e.g. intermeshing, with elements on the receptacle wall
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms

Definitions

  • the invention relates to a mixing kneader for the thermal or chemical treatment of products in a liquid, pasty and / or powdery state in a housing, in which housing a kneader shaft equipped with disk elements and rotating about an axis of rotation is arranged, between the disk elements kneading counter-elements with one each Foot fixed to the housing are provided and the / the disc element / s is / are arranged in the disc planes perpendicular to the kneader shaft.
  • Products have to be treated in many industrial areas, but especially in the chemical industry.
  • a mixing kneader described above two chemical products have to be mixed so intimately that at least some of them react with one another. These products can pass through any state of aggregation, so that the demands placed on a mixer kneader are very high.
  • the present invention relates to a single-shaft mixer kneader as described, for example, in European patent application 90 11 86 26.2 or Swiss patent applications 0 1726 / 87-6, 0 1244 / 90-7 or 0 0146 / 95-1.
  • kneading bars are generally placed on the circumference. These kneading bars slide along the inside wall of the housing and clean the inside wall of, for example, product incrustations.
  • the disk elements themselves and the kneader shaft are usually also heated, so that product incrustations can also take place here.
  • These are cleaned from correspondingly shaped kneading counter elements, these kneading counter elements usually also forming a kneading gap together with the kneading bar or the disk elements, in which the product is sheared or squeezed.
  • All of these single-shaft mixer kneaders are concerned, among other things, with removing all surfaces that come into contact with the product to be treated and, in particular, the heated surfaces from product incrustations or buildup.
  • this cleaning of the surfaces takes place to a large extent, but it has been found that just between the feet of the kneading counter-elements, which are usually located opposite one another in the housing, form a ring which is not cleaned. Due to the lack of moving elements, this ring can even become so thick that it is referred to as a torus build-up.
  • This torus can fill a large part of the device cross-section and not only affects the product quality, but also the transport of the product in the axial direction.
  • the present invention has for its object to provide a mixer kneader of the above. To create a way in which the removal of product incrustations or buildup is further improved.
  • the foot of the kneading counter element also lies in the plane of the disc element (s).
  • the disk elements can consist of two parallel surfaces. A circumference of these disc elements then maintains a distance from the inner wall of the housing into which the foot of the kneading counter-element protrudes. Then the kneading counter element is bent at an angle around the disc element.
  • the disk element should be disc-shaped. In a partial cross section, this results in an approximately triangular configuration, the tip of the triangle lying in the plane of the disk elements and pointing to the foot. Viewed from the circumference, this tip is designed as a cutting edge, so that it can penetrate the product very well. This results in better K values, since with the previous kneading bars there are always clumps of product on the disc surfaces were pushed here, which partially kept the product away from the pane surfaces.
  • grooves can be formed in the circumference of the disk element.
  • other configurations of the disk element are also possible in any frame.
  • a scraper arm is bent at an angle from the base of the kneading counter element, which is preferably selected such that the scraper arm runs approximately parallel to the surface of the disc element.
  • a shaft scraper which runs close to the surface of this kneader shaft, then adjoins the scraper arm approximately axially parallel to the kneader shaft.
  • the mechanical stress especially in the foot area, is significantly lower here, since the scraping arm is bent to a lesser extent and is therefore exposed to less leverage from the product.
  • This kneading counter element is also structurally simpler.
  • two kneading counter elements are installed radially offset per disc level, one kneading counter element scraping one side of the disc element and the second the opposite side. Since, according to the invention, the feet of the kneading counter-elements are located in the same disc plane, the one rotating there Disc element effectively prevents the build-up of a product ring on the housing wall.
  • the remaining surface of the inner wall of the housing is cleaned by means of a cleaning element which is also arranged on the kneader shaft.
  • This cleaning element is preferably T-shaped, a radial stem of this cleaning element being connected to the kneader shaft.
  • a crossbar is placed on the trunk, which runs parallel to the axis or positioned near the inner wall of the housing.
  • kneading gaps are generally formed between the housing inner wall and the kneading bars in the known mixing kneaders
  • the tines form a kneading gap in the space between the kneader shaft and the housing inner wall.
  • This arrangement of the kneading gaps closer to the kneader shaft means a lower torque for the kneader shaft and thus a reduced force absorption when turning.
  • the design of the kneading counter-elements according to the invention makes it possible, moreover, to arrange the disk elements closer to one another on the kneader shaft than in the prior art. This in turn allows more disc elements to be placed on a shaft, which in turn improves product treatment because the heat transfer area is increased.
  • a mixer kneader P has a mostly horizontally arranged housing 1 with end walls 10 and 15.
  • a kneader shaft 20 rotates in this housing 1 and is supported with pins 21 and 22 in the bearings 12 and 17 on both sides of the housing 1.
  • a heating jacket for heating the housing is identified by 2.
  • the kneader shaft 20 is also preferably heated or cooled in a known manner, an inlet 6 and an outlet 7 for a heating medium being provided on a corresponding sealing head.
  • the Krieterwelle 20 is from a motor, not shown in detail by means of a placed over a V-belt pulley 23 V-belt driven, wherein between the V-belt pulley 23 and kneader shaft 20, a gear 24 is switched on.
  • the mixer kneader shown in Figure 1 is intended for continuous operation.
  • the product is filled into the interior of the housing through an inlet nozzle 3 and removed via the outlet nozzle 4.
  • various nozzles 5 are provided on the top for removing vapors.
  • an overflow weir 9 is provided in a flange connection 8 in front of the outlet connection 4 in the exemplary embodiment of a mixing kneader.
  • Disc elements 25 are located on the rotating kneader shaft 20 at regular intervals, while 26 kneading counter-elements 27 are inserted into a housing wall.
  • the kneading counter-elements 27 are inserted into the housing wall 26 with a flange, but can also be welded directly.
  • FIG. 2 shows a section of the housing 1 with the kneading shaft 20 inserted.
  • the kneading shaft 20 is fitted with disk-like disk elements 25, which are triangular or Roman in cross-section.
  • a disk wall 28 encloses an annular space 29, which is connected to an axial bore 31 in the kneader shaft 20 via passages 30.
  • a heating medium is guided into this axial bore 31, which can also enter the annular space 29 through the passages 30. This likewise heats the disk elements 25 or the disk wall 28.
  • a kneading counter element 27.1 sits with a foot 32 in a housing wall 33 and is fixed there.
  • a scraper arm 34 is bent off from this foot 32, the scraper arm 34 forms an angle w with the foot 32.
  • a shaft scraper 35 is attached to the scraper arm 34, which runs approximately axially parallel to the axis A of the kneader shaft 20 and maintains a slight distance a from the kneader shaft 20.
  • the scraper arm 34 runs approximately at an inclination to the axis A parallel to a surface 36 of the disk element 25. His foot 32 is arranged approximately in the plane E, which runs through the two tips 37.1 and 37.2 of the disc-shaped disk element 25.
  • the angle w also corresponds to an angle v with which the surface 36 extends with respect to the plane E.
  • the kneader shaft 20 rotates, as indicated in Figure 3, counterclockwise z.
  • the disc element 25 cut into a material to be processed. For example, heat is transferred to this material via the disk elements 25.
  • the disk elements 25 are also provided with a groove 37 in certain areas.
  • the disk elements 25 can also be configured differently, for example sawtooth-like or wave-like. They can also be provided with openings for material transport, etc. There is no limit to the inventive idea here.
  • the kneading counter elements 27.1 completely clean the surfaces 36 of the disk elements 25.
  • the kneading counter elements 27.1 there are opposing kneading counter elements 27.1 in the housing 1, so that a row of kneading counter elements always cleans one side of the surfaces, while this process is carried out by the opposite row of kneading counter elements on the other surface.
  • the feet 32.1 and 32.2 of opposing kneading counter-elements 37.1 lie almost exactly in plane E, so that a torus on an inner wall 38 of the housing can, if at all, only build up as a ring between these foot regions of the kneading counter-elements.
  • a torus can only build up between two static elements. In the present case, these are the foot areas between the kneading counter elements. Only here can a torus be supported by the inner wall 38 of the housing.
  • each cleaning element 40 is T-shaped, ie it has a stem 41 which is firmly connected to the kneader shaft 20 which a crossbar 42 is placed.
  • This crossbar 42 extends approximately parallel to the axis A near the housing inner wall 38. If necessary.
  • This crossbar 42 can also be inclined so that it participates in the transport of the product in the axial direction.
  • the main task of the crossbar 42 is to clean the inside wall 38 of the product from incrustations. It also acts with the inner wall 38 of the housing as a kneading gap, so that shearing of the product and thus also intimate mixing can take place in this kneading gap. The same also applies to the scraping arm 34 in cooperation with the surface 36 of the disk elements 25.
  • each kneading counter element 27.1 or 27.2 consists of a scraper arm and a wave scraper.
  • FIG. 5 it is indicated that two fork elements 43.1 and 43.2 of this type lie opposite one another in the housing 1. However, the arrangement of only one fork element is sufficient.
  • the T-shaped cleaning element 40.1 is located approximately in the middle between two disc elements 25, its transverse bar 42 extending up to close to the feet 32 of the adjacent fork elements 43.
  • a mixing kneader P 3 has two kneading counter-elements 27.3 and T-shaped cleaning elements 40 between two disk elements 25 described above.
  • prongs 44.1, 44.2 and 45.1, 45.2 which mesh with one another, extend from both the scraper arm 34 and from the trunk 41 to one another. This arrangement also alternates in opposite directions.
  • a number of kneading gaps form between the tines 44 and 45, which contribute significantly to improving the product mixing. Nevertheless, there are sufficient free spaces towards the disk elements 25 so that the product can be transported without difficulty.
  • the kneading counter elements 27 or fork elements 43 according to the invention have the considerable advantage that they can be adjusted radially towards the kneader shaft 20.
  • the foot 32 can be in the housing wall 33 be slidable and lockable again.
  • a gap s shown in FIG. 4 between the surface 36 of the disk element 25 and the scraper arm 34 can be changed in its width s.
  • Viscous-viscous products generally require a gap with a larger width s than light-viscous products. In the present exemplary embodiment, this is only shown for the kneading element 27, but the same also applies to the fork element 43.
  • T-shaped cleaning element A large number of configurations for the T-shaped cleaning element are also conceivable, as is indicated, for example, in Swiss patent application 00 146 / 95-1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
EP96113975A 1995-09-12 1996-08-31 Mélangeur-pétrisseur Withdrawn EP0761295A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19533693 1995-09-12
DE19533693A DE19533693A1 (de) 1995-09-12 1995-09-12 Mischkneter

Publications (1)

Publication Number Publication Date
EP0761295A1 true EP0761295A1 (fr) 1997-03-12

Family

ID=7771917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113975A Withdrawn EP0761295A1 (fr) 1995-09-12 1996-08-31 Mélangeur-pétrisseur

Country Status (5)

Country Link
US (1) US5823674A (fr)
EP (1) EP0761295A1 (fr)
AU (1) AU704446B2 (fr)
CA (1) CA2185309A1 (fr)
DE (1) DE19533693A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104289121A (zh) * 2013-07-15 2015-01-21 江苏嘉贤米业有限公司 秧苗营养土处理机

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6410783B1 (en) 2000-10-19 2002-06-25 Basf Corporation Method of producing carboxylic acid salts
WO2002089963A2 (fr) * 2001-04-25 2002-11-14 List Ag Barres melangeuses a effet nettoyant dans le sens radial ou axial
US8580953B2 (en) 2004-06-21 2013-11-12 Evonik Degussa Gmbh Water-absorbing polysaccharide and method for producing the same
US8361926B2 (en) 2008-11-25 2013-01-29 Evonik Stockhausen, Llc Water-absorbing polysaccharide and method for producing the same
WO2011062600A1 (fr) 2009-11-19 2011-05-26 E. I. Du Pont De Nemours And Company Polycondensation avec un réacteur malaxeur
DE102010060320A1 (de) 2010-06-30 2012-02-16 List Holding Ag Verfahren zur thermischen Trennung einer Lösung aus thermoplastischen polymer und Lösungsmittel
DE102013100182A1 (de) * 2012-09-28 2014-06-05 List Holding Ag Verfahren zur Durchführung von mechanischen, chemischen und/oder thermischen Prozessen
CN106573209B (zh) 2014-08-13 2020-01-03 维尔萨利斯股份公司 转子以及搅拌设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1085263A (en) * 1964-02-22 1967-09-27 Buss Ag Heat exchanger
CH674959A5 (en) * 1987-02-06 1990-08-15 List Ag Kneading mixer for thermal and chemical processing - agglomeration of paste is avoided by having two mixing zones and shaft with series of vaned arms which rotate between fixed kneaders
EP0445436A2 (fr) * 1990-03-05 1991-09-11 Alb. Klein GmbH & Co. KG Dispositif pour mélanger des matériaux de moulage de fonderie
EP0220575B1 (fr) * 1985-10-25 1992-12-30 Krauss-Maffei Aktiengesellschaft Dispositif à mélanger et à pétrir

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE23772E (en) * 1954-01-12 Foaming apparatus
US2729545A (en) * 1950-09-20 1956-01-03 Shell Dev Contact apparatus with rotating discs
US3563710A (en) * 1968-02-16 1971-02-16 Monsanto Co Polymerization apparatus
US4389119A (en) * 1982-01-04 1983-06-21 Usm Corporation Rotary processors
DE3522087A1 (de) * 1985-06-20 1987-01-02 Valentin Filippovic Bolsakov Homogenisator
CH672749A5 (fr) * 1986-12-19 1989-12-29 List Ag
CH674318A5 (fr) * 1987-08-28 1990-05-31 List Ag
CH678285A5 (fr) * 1988-02-16 1991-08-30 List Ag
CH679290A5 (fr) * 1989-10-04 1992-01-31 List Ag
CH686406A5 (de) * 1990-04-11 1996-03-29 List Ag Kontinuierlich arbeitender Mischkneter.
DE4303852A1 (de) * 1993-02-10 1994-08-11 List Ag Mischkneter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1085263A (en) * 1964-02-22 1967-09-27 Buss Ag Heat exchanger
EP0220575B1 (fr) * 1985-10-25 1992-12-30 Krauss-Maffei Aktiengesellschaft Dispositif à mélanger et à pétrir
CH674959A5 (en) * 1987-02-06 1990-08-15 List Ag Kneading mixer for thermal and chemical processing - agglomeration of paste is avoided by having two mixing zones and shaft with series of vaned arms which rotate between fixed kneaders
EP0445436A2 (fr) * 1990-03-05 1991-09-11 Alb. Klein GmbH & Co. KG Dispositif pour mélanger des matériaux de moulage de fonderie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104289121A (zh) * 2013-07-15 2015-01-21 江苏嘉贤米业有限公司 秧苗营养土处理机
CN104289121B (zh) * 2013-07-15 2016-02-24 江苏嘉贤米业有限公司 秧苗营养土处理机

Also Published As

Publication number Publication date
AU6219096A (en) 1997-03-20
CA2185309A1 (fr) 1997-03-13
DE19533693A1 (de) 1997-03-13
US5823674A (en) 1998-10-20
AU704446B2 (en) 1999-04-22

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