EP0144507B1 - Silo avec deux chambres à mélange - Google Patents

Silo avec deux chambres à mélange Download PDF

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Publication number
EP0144507B1
EP0144507B1 EP84108034A EP84108034A EP0144507B1 EP 0144507 B1 EP0144507 B1 EP 0144507B1 EP 84108034 A EP84108034 A EP 84108034A EP 84108034 A EP84108034 A EP 84108034A EP 0144507 B1 EP0144507 B1 EP 0144507B1
Authority
EP
European Patent Office
Prior art keywords
silo
chamber
mixing
chambers
dividing wall
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
Application number
EP84108034A
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German (de)
English (en)
Other versions
EP0144507A3 (en
EP0144507A2 (fr
Inventor
Werner Krauss
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.)
Claudius Peters AG
Original Assignee
Claudius Peters 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 Claudius Peters AG filed Critical Claudius Peters AG
Priority to AT84108034T priority Critical patent/ATE33561T1/de
Publication of EP0144507A2 publication Critical patent/EP0144507A2/fr
Publication of EP0144507A3 publication Critical patent/EP0144507A3/de
Application granted granted Critical
Publication of EP0144507B1 publication Critical patent/EP0144507B1/fr
Expired 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
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/4092—Storing receptacles provided with separate mixing chambers

Definitions

  • the invention relates to a double silo with an inner silo part and an outer silo part which surrounds it in a ring and is separated from it by an essentially vertical silo partition and with a vented, annular emptying chamber arranged on the bottom in the inner silo part for the silo space formed in the outer silo part. which is connected to it via a large number of openings near the floor in the silo partition.
  • the inner part of the silo has annular embankment surfaces, under which the annular emptying chamber for the outer silo space is arranged. This is intended to create good extraction conditions for the outer silo space, which are as favorable as those in the inner silo space, the extraction devices of which are centrally located.
  • the well-known silo is not intended for a mixing function, which among other things this shows that no mixing chamber is assigned to the inner silo space and that the annular emptying chamber for the outer silo space neither has the strong ventilation that would be necessary for the homogenization of the material in a mixing chamber, nor the height that is needed for the volume expansion of the material being homogenized in a mixing chamber.
  • the known emptying chamber is not a mixing chamber; Because a mixing chamber is understood to mean a relaxed emptying chamber connected downstream of a silo room, which has such a height and strong ventilation that the material removed from the silo not only simply passes through this chamber, but is also circulated in considerable volume therein by ventilation of different strengths and thereby is homogenized (DE-PS 15 07 888). Such mixing chambers are therefore also referred to as homogenizing chambers. - The double silo mentioned above has among other things proven to be particularly useful because it combines good emptying capacity of both silo spaces with good static properties.
  • the invention has for its object to provide such a silo arrangement in which mixing chambers are connected downstream of the two silo spaces.
  • the annular chamber includes a central chamber connected to the silo space formed in the inner silo part via an essentially vertical chamber partition wall, and that both chambers are designed as vented mixing chambers.
  • the vertical silo partition can be left untouched as an important static element.
  • the outer part of the silo can also be left in its simple shape, which sits directly on the grown soil or the main silo floor. Because of the not inconsiderable height of a mixing chamber, it must be accepted that the height usable for the inner silo space is reduced accordingly, so that its diameter has to be increased in order to maintain a predetermined volume. Accordingly, the horizontal components delimiting the inner silo space at the bottom are correspondingly more extensive and therefore more structurally problematic, and because of the mixing chambers to be arranged underneath, the direct support from the grown ground or the main silo floor is withdrawn.
  • the annular chamber is divided into a plurality of separate chambers, the radial partition walls located between these separate chambers representing additional stiffening ribs.
  • An embodiment is particularly expedient in which the inner silo space is connected to the inner mixing chamber via at least one spacious shaft that leads down to near the bottom of the inner mixing chamber.
  • several shafts are provided which are evenly distributed over the circumference and open to the inner silo space with a relatively large cross-sectional area, which preferably accounts for at least about 5%, more preferably at least about 10%, of the inner silo floor area. Since the shafts then have dimensions on the order of several meters in each direction, erge there are no afterflow problems.
  • the shaft floors are stronger than the other surfaces delimiting the inner silo space downwards and, if necessary, can be alternately ventilated, so that those involved in a mixing chamber silo play a key role in the mixing effect Drum formation within the main silo room starts from the shafts.
  • the mixing chambers assigned to the two silo spaces can expediently be equipped with extraction devices which can be operated independently of one another. However, it can also be advantageous if they can be connected to one another instead or in addition. The latter is useful, for example, if the same or to be mixed goods are stored in both silo rooms.
  • the arrangement can also be such that the mixing chambers are connected in series, that is to say that the material which has first passed through one mixing chamber then passes into the other mixing chamber and is homogenized there with the material originating from the other silo room .
  • the mixing chambers can be constructed in a cascade shape, i.e. their partition wall in the upper area contains at least one overflow opening through which the material flowing up in the mixing chamber that initially flows overflows into the second mixing chamber.
  • the main silo floor 2 which is designed as a common base plate for all silo parts, rests on the foundation 1 via suitable supports. It could also be arranged on the grown floor, which would require a slightly different but known discharge arrangement.
  • the cylindrical outer wall 3 of the silo rises and concentrically to it the equally cylindrical partition wall 4. In between is the annular outer silo space 5, while the inner silo space 6 is located inside the silo partition wall. Both silo rooms are closed by the silo ceiling 7 above.
  • the floor of the outer silo room 5 is formed by the main silo floor 2.
  • the lower boundary of the inner silo space 6 is largely at such a height above the main silo floor 2 that the height necessary for mixing chambers is present in between.
  • a cylindrical wall 9, arranged concentrically with the silo walls 3, 4, divides an inner mixing chamber 10 and an outer, partially annular mixing chamber 11. It is therefore referred to here as a chamber partition 9. At most of its height, it is cylindrically closed, as can be seen in FIG. 4. Together with the silo partition 4, it therefore forms excellent structural conditions for the support of the chamber ceilings 8, which carry the contents of the inner silo space 6.
  • the chamber partition 9 is connected to the silo partition 4 by wall pairs 12 on two diametrically opposite sides.
  • the chamber partition 9 has passage openings 14 in the area near the bottom.
  • the material stored in the main silo room 6 can therefore flow through the two shafts 13 and the passage openings 14 into the inner mixing chamber 10 if it is sufficiently fluidized by floor ventilation.
  • Ventilation devices 15 on the bottom of the shafts 13 serve this purpose.
  • ventilation devices 16 are provided on the chamber ceilings 8, which promote the mass flow of the material to the shafts 13.
  • the same purpose is served by a conical embankment 17 above the inner mixing chamber 10 and saddle-shaped embankments 18 over a diameter running transversely to the shafts 13, which also receive lines 19 for venting the inner mixing chamber 10, which are connected to ventilation lines 20 which are connected to the silo partition 4 held in the upper silo and there are open at 21.
  • the inner mixing chamber 10 is designed on the bottom with ventilation 22, which can be vigorously and zone-wise differently ventilated to homogenize the material contained therein, so that the material is strongly circulated therein with good mixing effects before it leaves the mixing chamber through the outlet opening 23, which leads to the Avoiding short-circuit currents has a raised edge 24.
  • the outlet opening 23 leads to a discharge line 25 via suitable closure members.
  • the mixing effect of a mixing chamber silo is essentially based on two mixing processes.
  • the first mixing process takes place in the silo room when, due to the zone-wise stronger ventilation and product discharge from the more ventilated zone, a so-called discharge stream forms above it, in which the product from different stored product layers converges.
  • the second mixing process is the homogenization of the material extracted from the main silo room in the mixing chamber.
  • the trumpets in the inner silo space 6 are expediently emanated from the shafts 13 by pressurizing their ventilation devices 15 with compressed air more than the ventilation devices 16 in the inner silo room.
  • the strength of the ventilation is adjusted to such an extent that there is only a limited flow of material from the silo space into the mixing chamber so that it is not flooded hydrostatically. This is possible because the shafts 13, even with limited loosening of the material contained therein and above them in the silo space, for a uniform flow of the material to the mixing chamber worry, even if uneven movements of goods (bridging, breakdowns) can be expected due to the poor ventilation in the main silo room.
  • the ventilation devices 15 in the shafts 13 can be operated alternately in order to form changing mixed flows in the inner silo space 6.
  • parts of the ventilation devices 16 are designed for zone-wise stronger ventilation and trombone formation if the load on both sides of the shafts 13 in the inner silo space on the chamber ceilings 8 otherwise does not participate sufficiently well in the removal of the goods can be.
  • more than two shafts 13 can also be provided for withdrawing the material from the silo space into the mixing chamber, for example three or four shafts evenly distributed over the circumference.
  • the shaft walls 12 divide two approximately semi-annular chambers 11 from each other, which are connected to the outer silo space 5 via bottom through openings 26 and form the mixing chambers for the latter. If more than two shafts 13 are provided, the number of these partially annular outer mixing chambers also increases accordingly.
  • Ventilation devices 27 provided on the bottom of the outer silo space 5 lead through the passage openings 26 into the outer mixing chambers, in which ventilation devices 28 are provided for zone-by-zone different, intensive homogenization ventilation.
  • the ventilation devices 27 in the outer silo space can expediently be operated zone by zone with different intensities in order to enable the above-mentioned formation of discharge streams also in the outer silo space.
  • the outer mixing chambers 11 are vented through the lines 20 and have outlet openings 29 which, in order to avoid short-circuit flow, have a raised collar 30 and lead to a discharge line via suitable closure members. In the example shown it is provided that they lead into the same discharge line 25 as the outlet opening 23 of the inner mixing chamber.
  • An example of this is the storage of raw meal for cement production.
  • the targeted use of the mixing possibilities provided by the two silo spaces allows a long-term compensation of fluctuations in composition than would be possible if only a correspondingly larger silo were used.
  • the mixing chambers can be interconnected in a so-called cascade by 9 overflow openings in the upper area of the chamber partition 31 are provided, which enable the following procedure, illustrated in FIG. 1.
  • the material originating from the outer silo space is homogenized in the outer mixing chamber and is then not drawn off via the outlet opening 29, but instead continuously flows through the passage opening 31 into the inner mixing chamber through a correspondingly high setting of the level of the material in the outer mixing chamber , so that not only the material originating from the inner silo space 6, but also the material overflowing from the outside is located in the inner mixing chamber, is homogenized there and can finally be drawn off through the outlet opening 23.
  • the reverse procedure could of course also be used.
  • the setting of the mixing level in the chamber from which the material is to flow into the other chamber is done by adjusting the ventilation strength.
  • the compressors provided for supplying the ventilation devices 22, 28 and possibly also 13, 27 can be regulated accordingly, so that by adjusting the ventilation, the amount of material overflowing from the one mixing chamber into the other mixing chamber and thus the mixing ratio can be adjusted.
  • Known distribution devices 32 can be used for the storage of the goods in the silo rooms. If the silo rooms work independently of each other, the distributor shown is of course set so that only one or the other silo room is loaded alternatively. The same applies if the silo rooms are operated as a network and fluctuations in the composition of one and the same good are to be compensated for by phase-shifted storage in the two silo rooms or phase-shifted deduction therefrom. However, both silo rooms can also be loaded parallel to each other.
  • the advantages of the invention are, on the one hand, that large silo volumes are provided under very statically favorable conditions in a very compact silo construction.
  • the cell construction shown with a plurality of cylinders arranged one inside the other and connected to one another results in high strength and thus makes it possible, for example in the case of silo diameters of over 20 m, to dispense with the prestressing of the reinforcement normally required, which saves considerable costs.
  • the span of the ceilings is much smaller, so that advantageous cost conditions also arise here.
  • Further advantages relate to the conditions of storage, withdrawal and mixing options. Since the horizontal paths are comparatively short in each silo room, a uniform mass flow can be achieved and thus a good use of the available silo room.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Storage Of Harvested Produce (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Claims (12)

1. Silo double, comprenant une partie interne de silo et une partie externe de silo qui entoure celle-ci en anneau et en est séparée par une cloison de silo sensiblement verticale (4), ainsi qu'une chambre d'évacuation annulaire désaérée (11), disposée au fond dans la partie interne de silo, pour le compartiment de silo (5) formé dans la partie externe de silo, chambre qui est en communication avec ce compartiment par une multiplicité d'ouvertures pratiquées dans la cloison de silo (4) à proximité du fond, caractérisé en ce que la chambre d'évacuation annulaire (11) entoure, avec interposition d'une cloison sensiblement verticale (9) de séparation des chambres, une chambre centrale (10) en communication avec le compartiment de silo (6) formé dans la partie interne de silo, et en ce que les deux chambres sont réalisées sous forme de chambres de malaxage désaérées.
2. Silo selon la revendication 1, caractérisé en ce que la cloison (9) de séparation des chambres est disposée, au moins en majeure partie, concentriquement avec la cloison de silo (4).
3. Silo selon la revendication 1 ou 2, caractérisé en ce que la chambre d'évacuation annulaire (11) est subdivisée en plusieurs chambres séparées.
4. Silo selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le compartiment interne de silo (6) est en communication avec la chambre de malaxage interne par au moins un puits de large volume (15) qui descend jusqu'à proximité du fond (2) de la chambre de malaxage interne (10).
5. Silo selon la revendication 4, caractérisé en ce qu'il est prévu plusieurs puits (15) qui sont répartis régulièrement sur la circonférence et qui s'ouvrent vers le compartiment interne de silo (6) par une surface de la section libre qui correspond au moins, pour chacun d'entre eux, à 5% environ de la surface de la section du compartiment interne de silo.
6. Silo selon la revendication 5, caractérisé en ce que les puits (15) ont une surface d'ouverture d'environ 10% de la surface de la section du compartiment interne de silo.
7. Silo selon l'une quelconque des revendications 4 à 6, caractérisé en ce que les fonds des puits peuvent être ventilés plus fortement que les autres surfaces (8) qui limitent vers le bas le compartiment interne de silo.
8. Silo selon l'une quelconque des revendications 4 à 7, caractérisé en ce que les fonds des puits peuvent être ventilas alternativement.
9. Silo selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les chambres de malaxage (10, 11) sont équipées de dispositifs de soutirage (23, 25, 29) qui sont actionnables indépendamment l'un de l'autre.
10. Silo selon l'une quelconque des revendications 1 à 9, caractérisé en ce que les dispositifs de soutirage (23, 29) des chambres de malaxage (10,11) peuvent être accouplés.
11. Silo selon l'une quelconque des revendications 1 à 10, caractérisé en ce que les chambres de malaxage (10, 11) peuvent être raccordées l'une à la suite de l'autre.
12. Silo selon la revendication 11, caractérisé en ce que la cloison (9) de séparation des chambres comporte, dans sa région supérieure, au moins une ouverture de trop-plein (31).
EP84108034A 1983-11-24 1984-07-10 Silo avec deux chambres à mélange Expired EP0144507B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108034T ATE33561T1 (de) 1983-11-24 1984-07-10 Doppel-mischkammersilo.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833342507 DE3342507A1 (de) 1983-11-24 1983-11-24 Doppel-mischkammersilo
DE3342507 1983-11-24

Publications (3)

Publication Number Publication Date
EP0144507A2 EP0144507A2 (fr) 1985-06-19
EP0144507A3 EP0144507A3 (en) 1985-07-24
EP0144507B1 true EP0144507B1 (fr) 1988-04-20

Family

ID=6215156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108034A Expired EP0144507B1 (fr) 1983-11-24 1984-07-10 Silo avec deux chambres à mélange

Country Status (4)

Country Link
US (1) US4606158A (fr)
EP (1) EP0144507B1 (fr)
AT (1) ATE33561T1 (fr)
DE (2) DE3342507A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989380A (en) * 1988-07-28 1991-02-05 Ibau Hamburg Ingenieurgeselllschaft Industriebau Mbh Silo for pulverulent and fine-grained bulk materials
DE3835516C1 (fr) * 1988-10-19 1990-02-15 Ibau Hamburg Ingenieurgesellschaft Industriebau Mbh, 2000 Hamburg, De
DE3926798C2 (de) * 1989-08-14 1998-06-04 Krupp Polysius Ag Großraumsilo
US4943163A (en) * 1989-09-22 1990-07-24 Dynamic Air Inc. Blender for pneumatically mixing batches of dry granular materials by tumbling
DE3933314A1 (de) * 1989-10-05 1991-04-11 Krupp Polysius Ag Mehrkammersilo
US5074670A (en) * 1990-05-11 1991-12-24 Fuller Company Blender with feed rate control
US5319902A (en) * 1991-06-12 1994-06-14 A. Ahlstrom Mass tower and method of making the same
JPWO2003070605A1 (ja) * 2002-02-21 2005-06-09 義信 伊澤 流体、粉体又は粒体の供給タンク
FR2909984B1 (fr) * 2006-12-18 2010-12-10 Degremont Silo pour le stockage de produits en vrac, notamment des boues sechees de stations d'epuration.
DE102007063295A1 (de) * 2007-12-27 2009-07-02 Natec Gmbh Schneiden einer weichen Lebensmittelmasse
CN109569395B (zh) * 2018-12-26 2021-08-20 李世旭 一种提高水泥厂粉体库均化系数的下料方法
NL2033530B1 (nl) * 2022-11-14 2024-05-28 Rk Verwaltungs Gmbh Silo voor gescheiden opslag van een droog product en een nat product

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
US1988184A (en) * 1933-10-23 1935-01-15 Dravo Contracting Company Bin structure
DE1138608B (de) * 1960-09-07 1962-10-25 Peters Ag Claudius Verfahren und Einrichtung zum pneumatischen Mischen von staub-foermigem oder feinkoernigem trockenem Gut
DE1507888C3 (de) * 1966-06-22 1975-07-31 Claudius Peters Ag, 2000 Hamburg Vorrichtung zum Mischen von Schüttgut mit belüftbarem Silo
DE1531003A1 (de) * 1967-06-09 1970-02-12 Polysius Ag Etagensiloturm
FR2110817A5 (fr) * 1970-10-30 1972-06-02 Constantin E
US3648985A (en) * 1970-12-01 1972-03-14 Fuller Co Blending apparatus
CA1076101A (fr) * 1975-12-30 1980-04-22 Kenneth C. Yi Melangeur pour matieres granuleuses
JPS5331334A (en) * 1976-09-03 1978-03-24 Hitachi Zosen Corp Multifold cylindrical silo
DE2657597C2 (de) * 1976-12-18 1982-02-04 Claudius Peters Ag, 2000 Hamburg Schüttgutsilo mit Homogenisierkammer
FR2374073A1 (fr) * 1976-12-18 1978-07-13 Peters Ag Claudius Silo a chambre de melange pour matieres en vrac
DE2727499B2 (de) * 1977-06-18 1980-11-13 Claudius Peters Ag, 2000 Hamburg Misch- oder Homogenisierkammer in einem Silo
US4375335A (en) * 1977-06-30 1983-03-01 Klein Albenhausen Heinrich Silo combination for mixing stored material
US4185926A (en) * 1978-02-28 1980-01-29 Westinghouse Electric Corp. Safe-geometry pneumatic nuclear fuel powder blender
DE2827991C2 (de) * 1978-06-26 1988-01-21 Claudius Peters Ag, 2000 Hamburg Schüttgutsilo mit Mischkammer
DE3002030A1 (de) * 1980-01-21 1981-07-23 Krupp Polysius Ag, 4720 Beckum Pneumatisches mischsilo
NL8000398A (nl) * 1980-01-22 1981-08-17 Pelt & Hooykaas Werkwijze voor het afwerken van een dakconstructie, galerij, balkon of terras.
DE3015068C2 (de) * 1980-04-18 1984-12-13 Claudius Peters Ag, 2000 Hamburg Mehrfachsilo
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US4373820A (en) * 1981-03-17 1983-02-15 Jesse Browning Apparatus for mixing reclaimed and virgin powder for use in spray booths
EP0064572A3 (fr) * 1981-05-07 1982-12-15 Bold-Fertigbau GmbH & Co. Silo, en particulier composé d'éléments préfabriqués en béton armé
DE3143387A1 (de) * 1981-11-02 1983-05-11 Krupp Polysius Ag, 4720 Beckum Verfahren zum betrieb eines durchlaufmischsilos
US4506985A (en) * 1983-05-20 1985-03-26 Claudius Peters Ag Mixing chamber silo for loose material

Also Published As

Publication number Publication date
DE3342507A1 (de) 1985-06-05
EP0144507A3 (en) 1985-07-24
EP0144507A2 (fr) 1985-06-19
DE3470464D1 (en) 1988-05-26
US4606158A (en) 1986-08-19
ATE33561T1 (de) 1988-05-15

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