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EP0726091B1 - Mélangeur à circulation - Google Patents

Mélangeur à circulation Download PDF

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Publication number
EP0726091B1
EP0726091B1 EP96101712A EP96101712A EP0726091B1 EP 0726091 B1 EP0726091 B1 EP 0726091B1 EP 96101712 A EP96101712 A EP 96101712A EP 96101712 A EP96101712 A EP 96101712A EP 0726091 B1 EP0726091 B1 EP 0726091B1
Authority
EP
European Patent Office
Prior art keywords
wall
mixer according
loop
product
loop mixer
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 - Lifetime
Application number
EP96101712A
Other languages
German (de)
English (en)
Other versions
EP0726091A1 (fr
Inventor
Herwig Burgert
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.)
DMT - GESELLSCHAFT FUER DOSIER- UND MISCHTECHNIK M
Original Assignee
Dmt - Gesellschaft fur Dosier- und Mischtechnik Mbh
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 Dmt - Gesellschaft fur Dosier- und Mischtechnik Mbh filed Critical Dmt - Gesellschaft fur Dosier- und Mischtechnik Mbh
Publication of EP0726091A1 publication Critical patent/EP0726091A1/fr
Application granted granted Critical
Publication of EP0726091B1 publication Critical patent/EP0726091B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping 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
    • B01F27/80—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
    • B01F27/9211—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 being surrounded by a guiding tube

Definitions

  • the invention relates to a loop mixer for mixing a Solids, especially fibers, containing a product cylindrical mixer housing that has an inlet and an outlet for the product and in the with a cylindrical guide tube a mixing loop is formed in which the product the interior of the guide tube via a radial opening in front of you front end of the guide tube in an annular cylindrical Outside of the guide tube deflected and transported back there in counterflow and from which the product is made on the outside arranged of the guide tube, which cross the radial opening Guides to the outlet, the transport of the Product a rotating displacer arranged inside the guide tube is.
  • Loop mixers of this type are known as "dynamic loop mixers" known to the applicant and have been used for many years. They offer the advantage that the mixing process takes place without dead space can and an even mean lead time for the product - and thus an even mixing - through the accountings, which has a downstream entrance opening in the exterior have and the mixed product for regular on the the front-side outlet side opposite the inlet side transport, the guidance devices are required to the product at the radial opening and regardless of the product flow to be transported through the radial opening to the outlet. Accordingly, the guide devices in the radial Opening of product flows around in the mixing loop. Contains the product solids, especially fibers, these tend to accumulate on the outside of the control devices and so reduce the radial opening or clog it completely to let.
  • a loop mixer at the beginning mentioned type characterized in that in Area of the radial opening radially in front of the guide devices a rotating scraper tool is arranged with a radial wall is provided with at least one wall section which is completed by an oblique edge so that the height the wall changes.
  • the problem of clogging the loop mixer can be solved with the help of a simple rotating tool solve that is in the form of a cylindrical wall and with the oblique edge of the at least one wall section accumulated solids, especially fibers, to the side of the Guides pushes away so that the solids, especially Fibers, from the one flowing through the free cross-section of the radial opening Product flow can be recorded and taken along, so properly remain in the product circulating in the mixing loop.
  • the wall section is triangular formed with a sawtooth shape, ie a triangle with a long flat slope and a short steep slope, especially is preferred.
  • the maximum height of the wall section is approximately corresponds to the greatest height of the radial opening.
  • the stripping tool is with the at least one wall section in a pot shape formed a bottom, the bottom of the stripping tool as the end of the guide tube is arranged.
  • the rotational speed of the rotating stripping tool is not critical.
  • the stripping tool can therefore be easily have a common drive with the rotating displacer.
  • the rotating displacer is expediently a screw conveyor, so that the stripping tool is preferably on the drive shaft Screw conveyor is attached.
  • the inner wall of the guide tube axially preventing the product from rotating with the displacer has extended paragraphs.
  • the inner wall can be made from each other eccentrically arranged cylindrical wall sections formed between which the paragraphs are formed.
  • Figure 1 shows a mixer housing 1, which is substantially cylindrical is formed and on an end face an inlet 2 for the product to be mixed and on the other face has an outlet 3 for the mixed product.
  • a guide tube 4 Coaxial with the mixer housing 1 there is a guide tube 4, whose length is shorter than the length of the mixer housing 1 in cylindrical part, so that radial openings 5, 6 on both Ends of the guide tube 4 arise through which the product from the Inside the guide tube 4 in a between the guide tube 4 and Mixer housing 1 formed cylindrical outer space 7 and vice versa can reach.
  • a rotating drive shaft is in the axis of symmetry of the guide tube 4 8 a screw conveyor 9 is arranged.
  • the guide tube 4 essentially filling screw 9 transports the product from the input end of the guide tube 4 to the output side End where the product is redirected into the cylindrical outer space 7 and in counterflow to the inlet end of the guide tube is conveyed back to then through the inlet 2 to mix in the new product.
  • the amount of processed product emerging through outlet 3 corresponds the amount of product pressed into the mixer through inlet 2.
  • Arrows P illustrate the product circulation in the through the interior and the annular cylindrical outer space 7 of the guide tube 4 is formed Mixing loop and the feeding of the product through the inlet 2 and the exit of product through the pipe sections 10 in the Outlet 3.
  • the cup-shaped with a Bottom 14 and a radial wall 15 is formed in the area of the radial through opening 5 rotating stripping tool 13 arranged.
  • the radial wall 15 rotates immediately in front of the radially inner end of the one Common radius arranged, serving as guidance devices Pipe pieces 10.
  • the bottom 14 forms a front end in Extension of the guide tube 4 and at a distance from its outlet side End edge 16.
  • the radial wall 15 is formed with two wall sections 17 which are provided with an oblique edge 18.
  • the scraper tool 13 has the rotary shaft 8 connected, so rotates together with the screw conveyor 9. Due to the direction of rotation R, the product with the help of oblique edge 18 laterally pushed away from the tube pieces 10. By doing Solids contained in the product are therefore in the free area between promoted the pipe sections 10 and pass through the free area the radial opening 5 with that generated by the screw conveyor 9 Product flow into the ring-cylindrical outer space 7.
  • a collection of solids or fibers on the inflow side the pipe sections 10 functioning as guide devices therefore become effective avoided.
  • Figure 3 illustrates that the guide tube 4 is not a uniformly cylindrical Has inner wall 20, but that the inner wall 20 from there are four cylindrical sections 21 which are eccentric to each other are arranged and therefore form axially aligned shoulders 22. This arrangement prevents material on the one hand with the rotation in the direction R of the screw 9, which rotates the would prevent the desired transport effect in the axial direction, on the other hand, clogging of any grooves, circular openings or similar avoided.
  • Figure 4 illustrates in another embodiment of the wall of the Guide tube 4 that the outer wall according to the design of the Inner wall 20 can be graded if this is from manufacturing Reasons seems appropriate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (12)

  1. Mélangeur à circulation pour mélanger un produit contenant des solides, en particulier des fibres, ce mélangeur comportant un carter cylindrique (1) du mélangeur, qui présente une entrée (2) et une sortie (3) pour le produit et dans lequel est constituée au moyen d'un tube de guidage cylindrique (4) une boucle de mélange dans laquelle le produit sortant de l'intérieur du tube de guidage (4) est dévié par une ouverture radiale (5) devant une fermeture frontale (14) du tube de guidage (4) dans un espace extérieur (7) cylindrique et annulaire du tube de guidage (4) et y est ramené à contre-courant, boucle à partir de laquelle le produit parvient à la sortie (3) au moyen de dispositifs de guidage (10) disposés sur le côté extérieur du tube de guidage (4) en travers de l'ouverture radiale (5), un propulseur rotatif (9) étant agencé à l'intérieur du tube de guidage (4) pour le transport du produit, caractérisé en ce qu'un outil de débourrage (13) axialement rotatif est disposé dans la zone de l'ouverture radiale (5) radialement à l'intérieur devant les dispositifs de guidage (10), et cet outil de débourrage est muni d'une paroi radiale (15) comportant au moins une partie de paroi (17) qui est terminée par un bord oblique (18) de manière que la hauteur de la paroi (15) varie.
  2. Mélangeur à circulation selon la revendication 1, caractérisé en ce que la partie de la paroi (1 7) est réalisée triangulaire.
  3. Mélangeur à circulation selon la revendication 2, caractérisé en ce que la partie de paroi (17) est réalisée en forme de dents de scies.
  4. Mélangeur à circulation selon l'une des revendications 1 à 3, caractérisé en ce que la hauteur maximale (H2) de la partie de paroi (17) correspond sensiblement à la plus grande hauteur de l'ouverture radiale (5).
  5. Mélangeur à circulation selon l'une des revendications 1 à 4, caractérisé en ce que la paroi radiale (15) de l'outil de débourrage (13) présente deux parties de parois (17).
  6. Mélangeur à circulation selon l'une des revendications 1 à 5, caractérisé en ce que l'outil de débourrage (13) comportant au moins une partie de paroi (17) est réalisé en forme de pot avec un fond (14), et en ce que le fond (14) est disposé en tant que fermeture frontale du tube de guidage (4).
  7. Mélangeur à circulation selon l'une des revendications 1 à 6, caractérisé par un entraínement en rotation commun (8) pour le propulseur (9) et l'outil de débourrage (13).
  8. Mélangeur à circulation selon l'une des revendications 1 à 7, caractérisé en ce que le propulseur est un transporteur à vis (9).
  9. Mélangeur à circulation selon la revendication 7 ou 8, caractérisé en ce que l'outil de débourrage (13) est fixé à un arbre d'entraínement (8) du transporteur à vis (9).
  10. Mélangeur à circulation selon l'une des revendications 1 à 9, caractérisé en ce que la paroi intérieure (20) du tube de guidage (4) présente des décrochements étendus axialement (22) empêchant le produit de tourner avec le propulseur rotatif (9).
  11. Mélangeur à circulation selon la revendication 10, caractérisé en ce que la paroi intérieure (20) est constituée de parties de parois cylindriques (21) disposées excentriquement l'une par rapport à l'autre, entre lesquelles les décrochements (22) sont constitués.
  12. Mélangeur à circulation selon l'une des revendications 1 à 11, caractérisé en ce que les dispositifs de guidage (10) sont des tronçons de tube.
EP96101712A 1995-02-09 1996-02-07 Mélangeur à circulation Expired - Lifetime EP0726091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19504272A DE19504272C2 (de) 1995-02-09 1995-02-09 Schlaufenmischer
DE19504272 1995-02-09

Publications (2)

Publication Number Publication Date
EP0726091A1 EP0726091A1 (fr) 1996-08-14
EP0726091B1 true EP0726091B1 (fr) 2000-05-03

Family

ID=7753551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101712A Expired - Lifetime EP0726091B1 (fr) 1995-02-09 1996-02-07 Mélangeur à circulation

Country Status (3)

Country Link
EP (1) EP0726091B1 (fr)
DE (2) DE19504272C2 (fr)
ES (1) ES2150606T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008009647B4 (de) * 2008-02-18 2011-04-14 Christian Dr. Koch Schlammreaktorpumpe zur gleichzeitigen Förderung von Feststoffen, Flüssigkeiten, Dampfen und Gasen
CN109012350A (zh) * 2018-07-20 2018-12-18 广东鑫皇冠新材料有限公司 一种带清洁装置的粉末涂料搅拌机
CN109126549A (zh) * 2018-07-20 2019-01-04 广东鑫皇冠新材料有限公司 一种自动清洁的粉末涂料搅拌机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1298117A (en) * 1970-07-30 1972-11-29 Gardeners Of Gloucester Ltd Improvements in or relating to mixing means
US4132666A (en) * 1975-10-09 1979-01-02 Japan Synthetic Rubber Company, Limited Process for preparing alkali metal dispersions
DE9016076U1 (de) * 1990-11-26 1991-02-21 Kraft General Foods Europe R & D, Inc. Zweigniederlassung München (eine Zweigniederlassung der Kraft R & D, Inc., Wilmington, Delaware/USA), 8000 München Einrichtung zur Herstellung eines aseptischen Gemisches von flüssiger oder pastöser Masse mit Festteilchen

Also Published As

Publication number Publication date
EP0726091A1 (fr) 1996-08-14
DE19504272C2 (de) 1997-10-23
ES2150606T3 (es) 2000-12-01
DE59605080D1 (de) 2000-06-08
DE19504272A1 (de) 1996-08-22

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