WO1988004198A1 - Sechoir ou reacteur malaxeurs multiaxiaux - Google Patents

Sechoir ou reacteur malaxeurs multiaxiaux Download PDF

Info

Publication number
WO1988004198A1
WO1988004198A1 PCT/EP1987/000763 EP8700763W WO8804198A1 WO 1988004198 A1 WO1988004198 A1 WO 1988004198A1 EP 8700763 W EP8700763 W EP 8700763W WO 8804198 A1 WO8804198 A1 WO 8804198A1
Authority
WO
WIPO (PCT)
Prior art keywords
arms
shaft
agitator
scraper
segment
Prior art date
Application number
PCT/EP1987/000763
Other languages
German (de)
English (en)
Inventor
Heinz Nienhaus
Original Assignee
Heinz Nienhaus
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 Heinz Nienhaus filed Critical Heinz Nienhaus
Publication of WO1988004198A1 publication Critical patent/WO1988004198A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/008—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using scrapers
    • 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
    • B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
    • B01F27/702—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with intermeshing paddles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/481—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with paddles, gears or discs

Definitions

  • the invention relates to a multi-axis mixing dryer or reactor according to the preamble of claim 1.
  • a known mixer of this type (DE-AS 20 12 294) has two agitator shafts which are driven at different speeds and are dependent on one another.
  • the first shaft main agitator shaft
  • the first shaft main agitator shaft
  • the second agitator shaft (so-called cleaning shaft; only equipped with scrapers, which may also be connected in pairs with kneading bars on the outside diameter.
  • the second cleaning shaft rotates many times faster than the main stirring shaft to clean the discs.
  • the cleaning of the disc segments and the main agitator shaft is based on the faster speed of the cleaning shaft, which alone has a different influence on the material exchange and the transport speed in the two agitator shaft areas, even with continuously operating machines.
  • the scrapers are provided in pairs on the outside diameter with short kneading bars, which have a larger pitch than the counteracting kneading bars located on the main agitator shaft, and more so because the ratio of the speed of the two agitator shafts to one another is different.
  • Fig. 1 A partial section in plan view of a mixer dryer or reactor according to the invention
  • Fig. 2 A section along the line A-A of Fig. 1;
  • Fig. 4 A section along the line A-A of Fig. 3;
  • Fig. 6 A section along the line A-A of Fig. 5;
  • Fig. 7 A longitudinal section through a mixer dryer or
  • Fig. 8 A section along the line A-A of Fig. 7;
  • Fig. 9 A section along the line B-B of Fig. 7;
  • Fig. 10 A section through the outlet part of the machine along the line
  • Fig. 12 A partial section through a mixer dryer or
  • Fig. 13 A section along the line A-A of Fig. 12.
  • FIG. 1 shows a top view of a partial section of a multi-port mixing dryer or reactor according to the invention in a housing (1) in parallel position with respect to two stirring shafts 2 and 3.
  • the agitator shaft 2 carries scraping arms 34, two adjacent scraping arms being connected to one another by a short knife bar 36. There is a free space between the scraping arms lying side by side in the axial direction and connected to the short knife bar, in which the stirring arms 33 engage when the two stirring shafts rotate next to each other.
  • the stirring arms 33 are connected to a continuous knife bar. Both the short knife strips 36 and the continuous knife strips 35 run axially parallel to the agitator shafts and have a cutting edge which points in the direction of rotation.
  • FIG. 2 shows the shape of the stirring arms 33 and the scraping arms 34 in a side view.
  • the stirring arms and scraper arms are inclined forward in the direction of rotation and each carry the knife bar at their outer radial end, the knife bars being guided at a short distance from the inner surface of the housing.
  • the spacing of the agitator shafts is such that the agitator arms and scraper arms come into engagement with one another when the two agitator shafts rotate in opposite directions, the knife bars of the scraper arms or the agitator arms moving directly in front of the respective opposite agitator shaft.
  • the knife bars of the stirring arms and the scraping arms are first guided along the inner wall of the housing.
  • the continuous knife bar is first guided in front of the short knife bars along the front sides of the scraping arms 34 to the shaft of the stirring shaft carrying the scraping arms (see curve b in FIG. 2).
  • the scraping arms 34 sweep along the stirring arms 33 (see curve a in FIG. 2) and free them from material accumulations.
  • the material to be treated is intensively shredded and divided or mixed.
  • the front edge of the scraping arms 34 is curved and runs approximately parallel to the locus which is traversed by the cutting edge of the knife bar attached to the stirring arms. This locus is indicated by a dash-dotted line as curve b in FIG. 2.
  • the front edges of the scraping arms are preferably provided with cutting edges in order to facilitate the cutting and scraping off of the material to be treated.
  • the agitator shaft 2 is only provided with scraper arms and the agitator shaft 3 is only provided with agitator arms. Accordingly, the short knife strips 36 are only assigned to the stirring shaft 2 and the continuous knife strips 35 to the stirring shaft 3.
  • the embodiment according to FIGS. 3 and 4 differs in contrast by the arrangement of stirring arms 33 and scraping arms 34 on both stirring shafts 2 and 3.
  • the stirring arms and scraping arms are evenly distributed over the circumference of the stirring shaft, but there is a larger or smaller distance between a stirring arm and a subsequent scraper arm, or vice versa for the scraping and stirring arms that are perpendicular to one another Stirrer shaft are assigned to the standing level.
  • the radial spacing of the two agitator shafts from one another is selected such that the knife strips of the scraping and agitating elements of an agitator shaft extend in the overlap area to directly in front of the shaft of the opposite agitator shaft.
  • the agitator arms are scraped on both sides to below the knife strips 35, the material to be treated being intensively crushed and mixed.
  • the heating medium supplied to the multi-axis mixer dryer during the drying process is passed through the double-walled housing and the double-walled stirrer shafts.
  • An embodiment of the invention, which offers further possibilities for heating the material to be processed, is shown in FIGS. 5 and 6.
  • the multi-axis mixing dryer or reactor is provided with broadened thermal exchange surfaces by the stirring arms being designed as disks 4. These disks can be heated and / or cooled on the inside, and the lateral thermal exchange surfaces can be designed to be relatively large.
  • the disks 4, which are arranged in one plane over the circumference of the agitator shaft, are numerically based on those interacting with these disks 4 as segment scraper 6 trained shear organs matched.
  • the outer face of the disks 4 assigned to the inner surface of the housing 1 has an increasingly greater distance from the inner surface of the housing, starting from the male connector 5.
  • a segment section 61 is provided at the end of the scraper arm, which results in a front edge running along the inside of the housing, which is provided with a cutting edge 62 behind the knife bar. This has a particularly advantageous effect when sweeping over the disks 4, since this frontal edge sweeps over large areas of the thermal exchange surfaces of the disks 4 when the disks and the segment scrapers interlock.
  • This tip cutting edge 62 can be shaped as in FIG. 6a and sweeps over the side surface of the disk 4 along the locus curves indicated in FIG. 6 with the dash-dotted lines a1, a2, a4 and a5.
  • the curve a1 of the cutting edge of the knife bar 37 and the curves a2-a5 are assigned points of the same name on the circular cutting edge 62.
  • Each of these curves consists of two branches, the branch which is first passed through inwards by the outer cutting edge and the branch which is subsequently passed outwards by the inner cutting edge of the tip cutting edge 62.
  • the curved and possibly also provided with a cutting edge of the scraping arm supports the scraping of the disc 4 in a surface area covered by the inner cutting edge of the tip cutting edge.
  • FIG. 7 shows a section through a preferred embodiment of a multi-axis mixing dryer or reactor, which is provided with heatable and / or coolable disks 4, which are arranged on both axially parallel agitator shafts, in order to create increased thermal exchange surfaces.
  • FIG. 9 and 11 show that two opposing disks 4 are provided on each agitator shaft in the individual planes.
  • the agitator shafts are mounted in a housing 1, which is supported on four feet 38 and carries various sockets on the top and bottom.
  • the nozzle 30 according to FIG. 8 serves for the entry of the material, whereas one or more nozzles 31 according to FIG. 9 can be used for the extraction of vapors or vapors or for cleaning and emptying.
  • To discharge the material is a nozzle 29 on the Provided underside, in addition to which further nozzles 39 Emptying can be appropriate.
  • the stirrer shafts 2 and 3 which are equipped with heating, mixing and shaving elements in the opposite symmetry and mirror symmetry, are mounted in bearings 21 in the drive housing 18 ' with the shaft journals 20.
  • the pins 16 of the agitator shafts are rotatably supported in bearings 19.
  • fabric bushings 15 and 19 are provided on both sides, which ensures a secure seal against the production space.
  • the two heatable and / or coolable agitator shafts 2 and 3 are driven by an electric motor 24 via V-belts 25 and gears 22, the ratio of the gears 22 being designed such that the two agitator shafts rotate at the same speed.
  • the heating takes place via rotary sealing heads 23, which are arranged at the outer end of the shaft journals 20.
  • the scraping and stirring elements are attached to the two stirring shafts 2 and 3, two disks 4 as stirring elements and two adjacent segment scrapers being assigned to each other.
  • the segment scrapers engage between two adjacent disks 4 and, with the front sides of the scraping arms and the front segment sections, sweep over the thermal exchange surfaces of the viewing disks 4.
  • the disks 4 are arranged in rows offset in the longitudinal direction of the agitator shafts, the front outer edge is connected to a continuous knife bar 5, the cutting edge of which is oriented in the direction of rotation.
  • the male connector 5 runs along a helix.
  • the segment scrapers 6 arranged in the circumferential direction between the disks 4 are angularly offset in a row along the length of the agitator shaft, the two viewing arms of the segment scrapers connecting the segment scraper also being aligned along a helical line that runs parallel to the continuous knife strip .
  • the segment scraper 6 are preferably offset by 90 ° to the segment scraper on the agitator shaft, so that they always grip between the disks 4 on the opposite agitator shaft, which is constructed in the opposite and mirror-symmetrical manner and thus a full-surface sweep of the thermally active side surfaces of the disks 4 ensure by the segment scraper.
  • the knife strips on the forehead scrapers as explained analogously with reference to FIG.
  • the segment scrapers have a sharp tip circle cutting edge on the segment section assigned to the housing wall and are connected to one another in the direction of rotation by the short knife strips 37.
  • the cutting edge of this knife bar points in the direction of rotation.
  • the segment sections of the segment scrapers provided with the sharp cutting edges run parallel to the
  • the segment scrapers 6 serve to keep the opposing thermal exchange surfaces of the disks 4 up to the agitator shaft and also cause the material to be comminuted, in particular if solidifying and clumping products tend to accumulate and form bridges.
  • the actual reaction space is delimited by end walls 14 and 27 and is kept free by the end scrapers 8 and 28 designed as scrapers.
  • the discharge part of the machine is provided behind the baffle plate 13 and the socket 29 is located in the bottom area thereof. In this area, the scraper frame 9 and the scraper frame 10 are provided on the agitator shaft, the scraper frame 9 running through the space which is bridged by the scraper frame 10.
  • All tools provided with scraping edges are preferably designed in such a way that the scraping edges are grinded back and there is a clearance angle to the surfaces to be cleaned.
  • This back grinding or turning which also applies to the disks 4 on the circumference, has the effect that the product remaining in the gap zone between the scraping edge and the counter surface is not rolled on.
  • An exception is the tip cutter 62, which is shaped according to FIG. 6a.
  • the shape of the segment scraper 7 and 12 and the scraper frame 9 and 10 can be seen in a side view from FIGS. 8 and 10, respectively.
  • FIG. 11 the mixer dryer or reactor explained with reference to FIGS. 7-10 is shown in a perspective partial view, from which the intermeshing of the segment scraper and the disks 4 and the knife bars can be seen when the agitator shafts rotate in opposite directions.
  • FIGS. 7-11 a further embodiment is shown, which differs from the embodiment according to FIGS. 7-11 only in that waves 2 and 3 crust breakers 32 are arranged on the agitator, each in the space between adjacent seals 4 lie.
  • Such crushers are provided in the case of material which is particularly difficult to treat and increase the effect of the segment scraper in that they pass under the knife bars 37 during rotation within the paired segment scraper 6 and thus form bridges or torus and larger product structures in the interior between the Prevent segment scrapers.
  • All of the described embodiments of the invention are variants which can also be used for discontinuous machines if the heating, mixing, stirring and / or cutting elements are arranged symmetrically to the outlet connection located in the middle of the housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Afin de permettre le traitement mécano-thermique de produits industriels difficiles à traiter, il est proposé ici une invention avec laquelle, grâce à la coopération des deux arbres agitateurs (2, 3) diamétralement opposés et comportant dans un carter (1) à deux cylindres des segments à disques, des couteaux (35, 36) fixés sur le diamètre extérieur, et des cadres racleurs (34) de segments en prise, les surfaces d'échange thermique demeurent exemptes de dépôts de croûte. Le produit est constamment broyé et homogénéisé. On peut obtenir un transfert longitudinal homogène avec des temps de séjour appropriés. Des brise-croûtes additionnels permettent de décomposer des produits grumeleux et d'empêcher les formations toroïdales. Plusieurs solutions différentes selon les produits sont possibles grâce à la modification et à l'agencement des organes malaxeurs et racleurs, grâce également à la modification du sens de rotation accompagnée d'une permutation des arbres agitateurs. Si on remplace les segments à disques par des bras agitateurs, on remplace aussi simultanément les cadres racleurs de segments par des cadres racleurs. Lorsqu'un seul des arbres agitateurs est équipé d'organes agitateurs (segments à disques ou bras agitateurs) auxquels sont fixés des couteaux, le deuxième bras agitateur ne reçoit en conséquence que des organes racleurs (cadres racleurs de segments ou cadres racleurs).
PCT/EP1987/000763 1986-12-11 1987-12-08 Sechoir ou reacteur malaxeurs multiaxiaux WO1988004198A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3642368.8 1986-12-11
DE3642368 1986-12-11

Publications (1)

Publication Number Publication Date
WO1988004198A1 true WO1988004198A1 (fr) 1988-06-16

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Application Number Title Priority Date Filing Date
PCT/EP1987/000763 WO1988004198A1 (fr) 1986-12-11 1987-12-08 Sechoir ou reacteur malaxeurs multiaxiaux

Country Status (2)

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EP (1) EP0293452A1 (fr)
WO (1) WO1988004198A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426127A1 (fr) * 1989-11-02 1991-05-08 Sumitomo Heavy Industries, Ltd Dispositif du traitement de liquide visqueux
EP0460466A1 (fr) * 1990-06-06 1991-12-11 Bayer Ag Réacteur/mélangeur autonettoyant avec un grand volume utilisable
EP0528210A1 (fr) * 1991-08-09 1993-02-24 Bayer Ag Réacteur-mélangeur complètement autonettoyant avec grand volume utile
EP0638354A1 (fr) * 1993-08-10 1995-02-15 Bayer Ag Mélangeur complètement autonettoyant
US5669710A (en) * 1994-12-05 1997-09-23 Bayer Aktiengesellschaft Completely self-cleaning mixer/reactor
EP0858829A2 (fr) * 1997-01-15 1998-08-19 Hoechst Aktiengesellschaft Réacteur présentant des profilés à haute surface s'emboítant
EP0896832A1 (fr) * 1997-08-12 1999-02-17 Hoechst Aktiengesellschaft Réacteur à profil emboítant et à haute surface et son utilisation
EP0897742A1 (fr) * 1997-08-12 1999-02-24 Hoechst Research & Technology Deutschland GmbH & Co. KG Réacteur à profils emboítants et à haute surface et son utilisation
WO2003035235A1 (fr) * 2001-10-18 2003-05-01 List Ag Melangeur
CN103350764A (zh) * 2013-06-18 2013-10-16 无锡市朋宇机械制造有限公司 回转式颗粒灌装机
DE102012107228A1 (de) * 2012-08-07 2014-02-13 List Holding Ag Vorrichtung zur Durchführung von mechanischen, chemischen und/oder thermischen Prozessen
WO2016038098A1 (fr) * 2014-09-09 2016-03-17 Nestec S.A. Appareil, procédé et utilisation
CN112191125A (zh) * 2020-10-10 2021-01-08 宁波信远炭材料股份有限公司 一种超低烧失石墨卷材生产工艺及其制造设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199737B (de) * 1961-12-07 1965-09-02 Schwan Bleistift Fabrik Misch- und Knetmaschine
DE2012294A1 (de) * 1969-03-17 1970-10-01 Heinz List Misch und Knetmaschine
EP0144092A2 (fr) * 1983-12-05 1985-06-12 Dipl.-Ing. H. List Industrielle Verfahrenstechnik Machine pour mélanger et pétrir

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199737B (de) * 1961-12-07 1965-09-02 Schwan Bleistift Fabrik Misch- und Knetmaschine
DE2012294A1 (de) * 1969-03-17 1970-10-01 Heinz List Misch und Knetmaschine
EP0144092A2 (fr) * 1983-12-05 1985-06-12 Dipl.-Ing. H. List Industrielle Verfahrenstechnik Machine pour mélanger et pétrir

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426127A1 (fr) * 1989-11-02 1991-05-08 Sumitomo Heavy Industries, Ltd Dispositif du traitement de liquide visqueux
AU640737B2 (en) * 1989-11-02 1993-09-02 Sumitomo Heavy Industries Ltd. Viscous liquid processor
EP0460466A1 (fr) * 1990-06-06 1991-12-11 Bayer Ag Réacteur/mélangeur autonettoyant avec un grand volume utilisable
US5334358A (en) * 1990-06-06 1994-08-02 Bayer Aktiengesellschaft Self-cleaning reactor/mixer with large useful volume
EP0528210A1 (fr) * 1991-08-09 1993-02-24 Bayer Ag Réacteur-mélangeur complètement autonettoyant avec grand volume utile
US5399012A (en) * 1991-08-09 1995-03-21 Bayer Aktiengesellschaft Fully self-cleaning reactor/mixer with a large usable volume
EP0638354A1 (fr) * 1993-08-10 1995-02-15 Bayer Ag Mélangeur complètement autonettoyant
US5669710A (en) * 1994-12-05 1997-09-23 Bayer Aktiengesellschaft Completely self-cleaning mixer/reactor
EP0858829A2 (fr) * 1997-01-15 1998-08-19 Hoechst Aktiengesellschaft Réacteur présentant des profilés à haute surface s'emboítant
EP0858829A3 (fr) * 1997-01-15 1999-03-17 Hoechst Aktiengesellschaft Réacteur présentant des profilés à haute surface s'emboítant
EP0896832A1 (fr) * 1997-08-12 1999-02-17 Hoechst Aktiengesellschaft Réacteur à profil emboítant et à haute surface et son utilisation
EP0897742A1 (fr) * 1997-08-12 1999-02-24 Hoechst Research & Technology Deutschland GmbH & Co. KG Réacteur à profils emboítants et à haute surface et son utilisation
WO2003035235A1 (fr) * 2001-10-18 2003-05-01 List Ag Melangeur
DE102012107228A1 (de) * 2012-08-07 2014-02-13 List Holding Ag Vorrichtung zur Durchführung von mechanischen, chemischen und/oder thermischen Prozessen
CN103350764A (zh) * 2013-06-18 2013-10-16 无锡市朋宇机械制造有限公司 回转式颗粒灌装机
WO2016038098A1 (fr) * 2014-09-09 2016-03-17 Nestec S.A. Appareil, procédé et utilisation
AU2015314254B2 (en) * 2014-09-09 2020-08-27 Société des Produits Nestlé S.A. Apparatus, process and use
CN112191125A (zh) * 2020-10-10 2021-01-08 宁波信远炭材料股份有限公司 一种超低烧失石墨卷材生产工艺及其制造设备

Also Published As

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