EP2578307B1 - Mischer mit indirekter Dampfheizung - Google Patents

Mischer mit indirekter Dampfheizung Download PDF

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Publication number
EP2578307B1
EP2578307B1 EP11008149.4A EP11008149A EP2578307B1 EP 2578307 B1 EP2578307 B1 EP 2578307B1 EP 11008149 A EP11008149 A EP 11008149A EP 2578307 B1 EP2578307 B1 EP 2578307B1
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EP
European Patent Office
Prior art keywords
condensate
drum
mixer
mantle
mixing means
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.)
Active
Application number
EP11008149.4A
Other languages
English (en)
French (fr)
Other versions
EP2578307A1 (de
Inventor
Bastiaan Soeteman
A.J. Van Der Lee
J. Martinetti
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.)
Bw Soeteman Bv
Original Assignee
Bw Soeteman Bv
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.)
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Publication date
Application filed by Bw Soeteman Bv filed Critical Bw Soeteman Bv
Priority to EP11008149.4A priority Critical patent/EP2578307B1/de
Publication of EP2578307A1 publication Critical patent/EP2578307A1/de
Application granted granted Critical
Publication of EP2578307B1 publication Critical patent/EP2578307B1/de
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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
    • F28F5/00—Elements specially adapted for movement
    • F28F5/02—Rotary drums or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
    • B01F29/63—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with fixed bars, i.e. stationary, or fixed on 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
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • 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
    • B01F35/90—Heating or cooling systems
    • B01F35/93—Heating or cooling systems arranged inside the receptacle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate

Definitions

  • the present invention relates to a mixer with a drum that comprises a mantle a bottom and a top and which rotates around an axis of rotation.
  • Such mixers are known from the state of the art, e.g. from document DE 20 2009 004 866 U1 , and for example produced by the applicant of this patent application. These mixers are particularly utilized for dry mixing, for example of chemicals, food products or the like. In the past, these mixers have been indirectly heated, i.e. the heating medium does not get into contact with the product to be mixed, with water or oil as a heating medium. However, the maximum temperature up to which the mixer can be heated with these transfer media and/or the heat transfer is limited.
  • the present invention relates to a mixer, this mixer comprises a drum, which rotates around an axis of rotation, which is preferably arranged horizontally.
  • the rotation of the drum can be continuous or discontinuous.
  • the drum can rotate around the axis of rotation clockwise or counterclockwise.
  • the drum of the mixer comprises a mantle, which is preferably shaped cylindrically and which is closed at both ends, for example with a column-plate.
  • the drum is preferably made from steel, particularly from stainless-steel.
  • the drum is heated indirectly with steam, i.e. the product to be mixed is, during the mixing process, never in contact with this heating-steam.
  • the steam condensates at least partially and this condensate is removed from the mixer without touching the product.
  • steam can be added to the product inside the drum in case the recipe requires the addition of steam.
  • the drum comprises a multitude of internal mixing means.
  • Such an internal mixing means is for example a plate, which is preferably bent.
  • Each internal mixing means is fixed to the drum and co-rotates together with the drum.
  • the inventive mixer does not comprise any mixing means which move relative to the drum.
  • each internal mixing means comprises one steam inlet and one condensate outlet.
  • the mantle comprises two or more hollow segments which can be subjected to steam individually. In case water is used as a heat transfer medium, preferably two or more individual segments are provided.
  • the internal mixing means are at least partially hollow. In this hollow volume, the steam is injected and heats the sidewall of the internal mixing means.
  • the mantle comprises preferably two sidewalls, preferably concentric sidewalls, which are spaced apart. In this hollow volume steam and/or water is injected, for example to heat and/or cool the inner sidewall of the mantle.
  • the hollow volume between the sidewalls is preferably divided in two or more individual segments.
  • Each segment extends preferably essentially over the entire length of the mantle and more preferably along only a part of the circumference of the inner sidewall.
  • Each segment comprises a steam-inlet and a condensate outlet.
  • the segments are operated in parallel. These segments can be operated in series, for example, in case water is inserted into the hollow volume between the sidewalls.
  • condensate is removed from each internal mixing means and the mantle via a collection pipe, which is connected to the condensate discharge of each internal mixing means and the condensate discharge from the mantle.
  • the collecting volume co-rotates with the drum.
  • the collecting volume preferably the collecting pipe, has the same shape as the circumference of the mantle of the drum.
  • the collecting pipe is ring-shaped.
  • the cross section of the collecting pipe is closed at one position.
  • one of the ends, more preferably both ends of the collecting pipe are closed.
  • the collecting pipe extends entirely beyond the circumference of the drum, i.e the distance of the colleting volume from the centerline is entirely, larger than the distance of the mantle of the drum from this centerline.
  • the internal mixing means comprise a condensate collection area in which the condensate is collected before it is discharged. More preferred, the condensate collection area is tilted towards the condensate discharge.
  • the subject matter "steam” and “condensate” has to be substituted by the subject matter "water and/or oil and/or any other fluid medium".
  • the steam inlet is the water/oil-inlet
  • the condensate outlet the condensate collection and/or condensated discharge is the water/oil outlet, water/oil collection and/or the water/oil discharge.
  • Another, yet not-claimed subject matter of the present invention is a method for heating the rotating drum of a mixer, with steam, whereas condensate is removed from the mixer discontinuously.
  • inventive mixer also applies to the method and vice versa.
  • the condensate is removed from the mixer discontinuously.
  • the discharge takes only place in certain rotational positions of the drum, preferably limited to a rotational segment of ⁇ 180°, more preferably ⁇ 150° and even more preferably ⁇ 120° and even much more preferred ⁇ 90°.
  • the condensate is discharged from the mixer at least temporarily, preferably entirely, by gravity, i.e. no pump is needed to discharge the condensate.
  • the mixing means and at least a segment of the mantle of the drum is heated with steam and the condensate is removed from the mixer only once per rotation of the drum.
  • Fig. 1 shows the inventive mixer 1.
  • This mixer comprises a drum 10 with a mantle 2, which is in the present case cylindrical.
  • the mantle 11 is closed at its first and second end 3, 4 by a bottom plate.
  • the drum rotates around its axis of rotation 5.
  • the mantle 2 of the drum 10 comprises two side walls, which are arranged concentrically and which are spaced apart, so that there is a hollow volume between the two side walls of the drum.
  • the inventive mixer comprises at least one mixing means 6, which improves the mixing of products within the drum. As can be particularly seen from fig. 3 , this mixing means 6 is hollow, so that steam can be injected into the mixing means 6.
  • the hollow volume between the first and the second side wall of the mantle 2 is divided in two separate segments.
  • Each segment extends essentially over the entire axial length of the drum 10 but extends radially only over a segment of a circle.
  • Each of these segments comprises a steam supply 12. 3, which is, in the present case, connected to a steam distribution pipe 12.1, which has, in the present case, the shape of a ring.
  • the internal mixing means 6 is also connected to a steam supply via the pipe 12.2 which is also connected to the distribution pipe 12.1. Between the steam inlet 12 and the distribution ring 12.1, a connecting pipe 12.4 is arranged.
  • the steam supply to the segments of the mantle and the internal mixing means 6 is operated preferably in parallel.
  • each internal mixing means comprises a condensate discharge pipe 8 and each hollow segment of the mantle comprises a condensate discharge pipe 9.
  • the pipes 8, 9 are connected to a condensate collection pipe 7, respectively, in which the condensate is collected prior to discharging from the mixer.
  • the condensate collection pipe 7 is designed as a ring, whose radius is larger than the external radius of drum 10.
  • This pipe 7 is closed at least partially, preferably entirely, at one position 16, preferably between the two ends 7.1 of the pipe 7. From this pipe 7 a discharge pipe extends from the collection pipe 7 here to the center of the drum, through which the condensate which has been collected in the collecting pipe 7 is discharged to the ambient.
  • Fig. 2 - 7 show construction details of the inventive mixer.
  • the mixer comprises a multitude, here three internal mixing means 6, which are all hollow, so that steam can be injected into the internal of these mixing means 6, where it condensates and thereby heats the product to be mixed.
  • the means 6 are fixed to the drum 10 and co-rotate with drum 10. There are no moving parts in the drum.
  • the inventive mixer comprises preferably support means 14 to support the steam inlet 12 and discharge outlet 7.2 and/or the rotational axis of the mixer.
  • Fig. 4 clearly depicts that the condensate collection pipe 7 is fixed to the drum 10 and co-rotates together with the drum 10 and that the diameter of the collection pipe 7 is larger than the outer diameter of the drum 10. This assures that when a pipe 8 or 9 is in its discharge position, e. g. between the 7 and 5 o'clock-position, the condensate flows downwards by gravity into the collection pipe 7.
  • the condensate discharge pipe 8 comprises a sloped portion 8.1, which is sloped downwards when this respective pipe 8 is in its discharge position. This also promotes the discharge from the internal mixing means 6 into the collection pipe 7.
  • Fig. 5 also depicts that each internal mixing means 6 comprises a condensate collection area 6.1.
  • this collection area 6.1 the condensate in the internal mixing means 6 is collected during the rotation of drum 10. From this collection area 6.1 the condensate flows via condensate discharge pipe 8 into the condensate collection pipe 7.
  • the collection area 6.1 is preferably sloped towards the collection pipe 7, to promote the outflow of the condensate.
  • Fig. 6 and 7 show, that steam inlet pipe 12 and condensate discharge 7.2 are at least partially arranged concentrically. Furthermore, it can be seen that drum 10 comprises an inspection opening 15. Particularly, from fig. 7 it can be seen that in the steam supply pipe 12.3 a valve 13 is provided, which is open during steam supply, so that both segments of the hollow mantle 2 are supplied with steam in parallel. In case water is supplied to the hollow mantle, this valve is closed, so that there is only one supply to the mantle. The two segments are now operated in series.
  • fluid guiding means e. g. for water, are arranged between the two side walls to improve the heat transfer between the fluid and the inner side wall of the drum 10.

Claims (3)

  1. Mischer (1) mit einer Trommel (10), die einen Mantel (2) umfasst, der an beiden Enden (3, 4) geschlossen ist und der sich um eine Drehachse (5) dreht, dadurch gekennzeichnet, dass die Trommel dazu konfiguriert ist, indirekt mit Dampf beheizt zu werden, der zumindest teilweise kondensiert, wobei die Trommel (10) eine Vielzahl von inneren Mischvorrichtungen (6) umfasst, die zumindest teilweise hohl sind, wobei jede innere Mischvorrichtung (6) an der Trommel (10) befestigt ist, sich zusammen mit der Trommel (10) dreht und einen Dampfeinlass (12), einen Kondensatablauf (8) und einen Kondensatsammelbereich (6.1) umfasst, wobei der Mantel (2) zwei oder mehr hohle Segmente umfasst, die einzeln mit Dampf beaufschlagt werden können, wobei jedes Segment einen Dampfeinlass (12) und einen Kondensatablauf (9) umfasst, wobei die Mischvorrichtungen (6) und der Mantel (2) der Trommel (10) zur Beheizung mit Dampf konfiguriert sind, wobei der Mischer (1) ein Kondensatsammelrohr (7) umfasst, das ringförmig ist und sich vollständig über den Umfang der Trommel (10) hinaus erstreckt und dazu konfiguriert ist, sich mit der Trommel (10) mitzudrehen, wobei der Querschnitt des Kondensatsammelrohrs (7) an einem Ende (7.1) des Kondensatsammelrohrs (7) geschlossen ist, wobei das Kondensatsammelrohr (7) mit dem Kondensatablauf (8) jeder Mischvorrichtung (6) und dem Kondensatablauf (9) des Mantels (2) verbunden ist, wobei der Mischer (1) so konfiguriert ist, dass das Kondensat über das Kondensatsammelrohr (7) von jeder Mischvorrichtung (6) und dem Mantel (2) entfernt wird, wobei das Kondensat in dem Kondensatsammelrohr (7) gesammelt wird und durch Schwerkraft und nur einmal pro vollständiger Drehung aus dem Mischer (1) abgeführt wird.
  2. Mischer (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Mantel (2) zwei voneinander beabstandete Seitenwände umfasst.
  3. Mischer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kondensatsammelbereich (6.1) der inneren Mischvorrichtungen (6) zu dem Kondensatablauf (8) geneigt ist.
EP11008149.4A 2011-10-07 2011-10-07 Mischer mit indirekter Dampfheizung Active EP2578307B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11008149.4A EP2578307B1 (de) 2011-10-07 2011-10-07 Mischer mit indirekter Dampfheizung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11008149.4A EP2578307B1 (de) 2011-10-07 2011-10-07 Mischer mit indirekter Dampfheizung

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EP2578307A1 EP2578307A1 (de) 2013-04-10
EP2578307B1 true EP2578307B1 (de) 2015-09-23

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US124112A (en) * 1872-02-27 Improvement in treating refuse animal matter for the manufacture of fertilizers
US561175A (en) * 1896-06-02 Drier
US738800A (en) * 1900-09-06 1903-09-15 Adolphus Busch Drying apparatus.
US2628080A (en) * 1950-09-22 1953-02-10 Patterson Foundry & Machine Co Jacketed conical blender
US2726069A (en) * 1951-02-22 1955-12-06 J R Andersson & Co Aktiebolag Fat processing apparatus
US3565168A (en) * 1969-04-01 1971-02-23 Pennwalt Corp Cone dryer
GB1445941A (en) * 1974-02-26 1976-08-11 Apv Co Ltd Heat treatment of particulate solid materials
DE202009004866U1 (de) * 2009-05-26 2010-10-14 Dr. Herfeld Gmbh & Co. Kg Kühlmischer

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