EP0366907B1 - Silo zum Lagern, Dosieren und Homogenisieren von Schüttgut - Google Patents

Silo zum Lagern, Dosieren und Homogenisieren von Schüttgut Download PDF

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Publication number
EP0366907B1
EP0366907B1 EP89116696A EP89116696A EP0366907B1 EP 0366907 B1 EP0366907 B1 EP 0366907B1 EP 89116696 A EP89116696 A EP 89116696A EP 89116696 A EP89116696 A EP 89116696A EP 0366907 B1 EP0366907 B1 EP 0366907B1
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EP
European Patent Office
Prior art keywords
silo
compartments
multipurpose
cone
removal
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
EP89116696A
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German (de)
English (en)
French (fr)
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EP0366907A1 (de
Inventor
Manfred Dipl.-Ing. Geiger
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.)
IBAU Hamburg Ingenieurgesellschaft Industriebau mbH
Original Assignee
IBAU Hamburg Ingenieurgesellschaft Industriebau mbH
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Publication of EP0366907A1 publication Critical patent/EP0366907A1/de
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    • 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 silo according to the preamble of claim 1.
  • a silo of the type mentioned above is known from DE-PS 28 44 589.
  • this known silo there is another silo main room in the annular silo main room above the tip of the central cone.
  • These two main silo rooms are used to store and mix the voluminous main components. Mixing takes place only when the goods are removed by so-called gravity blasts.
  • the ventilation devices on the annular floor of the main silo rooms only serve to pull off the stored bulk goods.
  • the ventilation devices are neither suitable nor designed to enable homogenization by swirling in the main silo room. This is excluded due to the very large dimensions.
  • the bulk material from the silo main rooms is replaced by appropriate Delivery lines are conveyed into the homogenizing cell.
  • the mixing known as homogenization takes place in this homogenizing cell. This is followed by removal from the homogenizing cell. A supply of additives is not planned. Intermediate storage is also not possible since there is only one such homogenizing cell which would then not be available for the necessary removal of bulk material from the main silo rooms.
  • a silo is known in which a relatively small mixing chamber is arranged in the middle on the bottom of the silo main space, into which the material from the silo main space passes via ventilation devices on a ring-shaped silo bottom.
  • the ring shape is created by the cylindrical outer wall of the mixing chamber.
  • On the ceiling of the mixing chamber there is a cone with a relatively low incline to prevent material deposits in this area.
  • a pipe for the pneumatic feeding of additional components leads into the mixing chamber.
  • the regulation of the supply and discharge from the mixing chamber or cell takes place only by actuating the ventilation devices on the floor of the main silo room and is inaccurate due to the open inlet on the chamber floor and is therefore only of limited use.
  • a silo which is designed as a multi-cell silo in such a way that the main silo space is divided into several rooms in that a central silo main space is present which is surrounded by one or more annular silo main rooms.
  • the floor is formed by a central cone, which has correspondingly ring-shaped silo floors for arranging the ventilation devices.
  • the material from the main silo rooms enters a mixing chamber below the central cone, which has a ventilated floor for mixing and homogenization. The addition of additives or additives to the mixing chamber is not provided here.
  • a silo which is equipped with a silo base which has a very slight inclination from its center to the edge.
  • a circumferential, ring-shaped channel is provided, which is connected to the main silo space in the area of the floor directly via a large number of openings. Delivery lines lead from this annular channel to a collecting line.
  • the invention is based on the object of creating a silo of the type mentioned at the outset which enables the storage and admixing of very different additives with precise admixture and at the same time has a compact construction, i.e. can be created economically.
  • a silo with a known central cone, which defines the annular bottom is equipped with a multiplicity of multipurpose cells, to which different additives can be fed independently of one another and from which these additives can be withdrawn from the silo main room according to the desired mixture to be produced with the material .
  • the aggregates are mixed and homogenized in the individual multi-purpose cells.
  • Mixing with the material from the main silo space takes place after the respective discharge lines have been brought together, preferably in a downstream mixer. Material that has already been removed and mixed from the main silo room and one or more multipurpose cells and cannot be used at the moment can be returned to the multipurpose cells.
  • the composition of this material is known, so that this composition can be taken into account in the further admixture and the corresponding mixing ratio.
  • the main silo space can be divided in a known manner into several main silo spaces, which either lie next to each other in segments or are formed by concentric silo main spaces.
  • the multi-purpose cells are designed and arranged as specified in claims 3 to 6, then they expand upwards so that the material has a larger volume available when it moves upwards. It can "expand” so that there is no fear of clumping. At the same time, the energy consumption during circulation with the help of the pneumatic loosening devices is low. If the formation is as stated in claim 4, then a slope, formed by the adjacent wall portion of the central cone, is available on which the material returns to the pneumatic area Loosening device can slip. In contrast to upwardly tapering mixing chambers or cells, the multipurpose cells according to the invention expand with optimal use of the space made available by the central cone between this central cone and the outer wall of the silo.
  • the main silo space has a diameter of approximately 20 m.
  • the central cone delimits the floor of the silo main room and the multi-purpose cells to the inside.
  • radial partition walls are provided.
  • the outer cone is supported on the central cone and starts from the outer wall of the silo. It defines the ring-shaped silo floor of the silo main room to the outside.
  • the multipurpose cells have useful contents between 100 and 400 cbm.
  • the pneumatic loosening devices of the multi-purpose cells are located on the corresponding cell floors directly between the adjacent wall section of the central cone and the outer wall of the silo.
  • the storage and mixing conditions with regard to the additives are very advantageous to use due to the short stays in the multi-purpose cells and low filling levels, due to the favorable cell cross-sectional shape, for a homogenization of the components and, if necessary, the setting of certain recipes.
  • the loads are low, the flow paths are short and the required pressure differences are low, so that easy ventilation of the material column is made possible.
  • the ventilation of the pneumatic loosening devices on the cell bottom causes an upward flow with one relaxing fluidizing bed in the material.
  • the mixture flow is slowly vented and slides down the inner wall section of the central cone in order to be caught again by the active flow in the bottom zone and to repeat the cycle. There is an intensive mass exchange in the material with little energy expenditure due to cell shape, cell size and type of ventilation.
  • a downstream compulsory mixing can therefore be dispensed with for some bulk material mixtures.
  • postmixing is desirable.
  • the multipurpose cells can also be used for one. short-term intermediate storage of finished batches can be used in order to economically balance the different rhythm during production and shipping. All of this goes hand in hand with high dosing accuracy.
  • the low filling levels result in low fluidizing pressures of the material mixture. This means that the outlet speeds are comparatively low and there are larger outlet cross-sections even for the smallest volume flows. There is a larger control range and leakage problems due to constipation are prevented.
  • the annular space (claim 7) not only allows filters to be arranged, but also an inspection of each multi-purpose cell is possible.
  • the silo shown in the drawing is formed by a silo outer wall 3 with a circular cylindrical cross section and a ceiling 4.
  • the floor is defined by a continuous central cone 5 pointing upwards.
  • the main silo space is divided by radial partition walls 2 into several main silo spaces 1, so that different base materials can be stored and removed.
  • Discharge lines 15 lead from the ventilation devices 9 with the interposition of metering slides 14 to a collector 16, which opens into a collecting line 17.
  • the collecting line 17 leads via a collector 20 and a sieve 21 to a balance 22.
  • a conveyor line 30 to the compulsory mixer 27 connects to the vessel scale 22.
  • the material passes from the compulsory mixer 27 into a removal device 26, which also serves for the delivery and the supply of the additives, which will be described later.
  • the central cone 5 and the outer cone 6 on the one hand and the outer silo wall 3 on the other hand create an annular space in which the multi-purpose cells 11 are arranged and formed.
  • Radial, vertical walls 19 determine the number of multipurpose cells depending on their number and limit them laterally.
  • Each multi-purpose cell has a base 8 with pneumatic loosening devices 10, which is directly adjacent to the outer wall 3 of the silo. Inside, it is delimited by the adjacent wall section of the central cone 5. At the top, each multipurpose cell is closed off by a false ceiling 12, so that an annular space 33 is created below the upper part of the outer cone 6, housed in the filter 13 and from which the Multipurpose cells can be inspected and serviced.
  • a discharge line 15 is provided for each silo main room, starting from the ventilation devices 9, a discharge line 18 is provided for each multi-purpose cell 11 with the interposition of a metering device 14. These discharge lines 18 lead into the collector 20. The conveyance from the main silo spaces 1 through the discharge lines 15 and from the multi-purpose cells through the discharge lines 18 takes place alternately, the mixing taking place depending on the recipe in the compulsory mixer 27.
  • a feed or return line 32 which starts from a diverter 34, leads into each multi-purpose cell. Conveying lines 23 and 24 lead into this pipe switch 34 for supplying or returning material to the multipurpose cells 11.
  • the mixed material which is not removed immediately at 26, can be conveyed back to one or more multipurpose cells 11 through the conveying line 23, in order to be stored there at least temporarily.
  • Material to be returned directly from the vessel scale 22 reaches the delivery line 24 via the pressure vessel 25.
  • the interior below the central cone 5 is designated 31. This interior is accessible in a known manner and accommodates the various devices, as can be seen in FIG. 1.
  • the multi-purpose cells can be used and operated in very different ways, and that this enables a very versatile and variable mode of operation of the silo.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
EP89116696A 1988-10-19 1989-09-09 Silo zum Lagern, Dosieren und Homogenisieren von Schüttgut Expired - Lifetime EP0366907B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835516A DE3835516C1 (enrdf_load_stackoverflow) 1988-10-19 1988-10-19
DE3835516 1988-10-19

Publications (2)

Publication Number Publication Date
EP0366907A1 EP0366907A1 (de) 1990-05-09
EP0366907B1 true EP0366907B1 (de) 1993-03-03

Family

ID=6365404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116696A Expired - Lifetime EP0366907B1 (de) 1988-10-19 1989-09-09 Silo zum Lagern, Dosieren und Homogenisieren von Schüttgut

Country Status (2)

Country Link
EP (1) EP0366907B1 (enrdf_load_stackoverflow)
DE (2) DE3835516C1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224054C2 (de) * 1992-07-21 1998-01-29 Krupp Polysius Ag Großraumsilo
DE4325112C1 (de) * 1993-07-27 1994-10-20 Wolfgang Kindler Farbdosieranlage
DE19521882A1 (de) * 1995-06-16 1996-12-19 Kloeckner Humboldt Deutz Ag Mischsilo mit Ringmischkammer und Verfahren zur Regelung des Auslaufmassenstromes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507888C3 (de) * 1966-06-22 1975-07-31 Claudius Peters Ag, 2000 Hamburg Vorrichtung zum Mischen von Schüttgut mit belüftbarem Silo
DE2040480A1 (de) * 1970-08-14 1972-02-17 Peters Ag Claudius Vorrichtung zum Mischen von Schuettgut
DE2640714C2 (de) * 1976-09-10 1982-09-30 Claudius Peters Ag, 2000 Hamburg Vorrichtung zum Mischen von Schüttgut
DE2844589C2 (de) * 1978-10-13 1986-07-17 Ibau Hamburg Ingenieurgesellschaft Industriebau Mbh, 2000 Hamburg Silo zum Lagern und Mischen von Schüttgut
DE3036968A1 (de) * 1980-10-01 1982-04-22 Meyer Maschinen- und Wiegeapparatebau GmbH & CO KG, 5202 Hennef Verfahren zur kontinuierlichen steuerung eines mischprozesses mit festen und/oder fluessigen rohstoffen
DE3314329A1 (de) * 1983-04-20 1984-10-25 Krupp Polysius Ag, 4720 Beckum Silo fuer mehlfoermiges schuettgut
DE3342507A1 (de) * 1983-11-24 1985-06-05 Claudius Peters Ag, 2000 Hamburg Doppel-mischkammersilo
DE3501612A1 (de) * 1985-01-18 1986-07-24 Krupp Polysius Ag, 4720 Beckum Verfahren zum abzug von schuettgut aus einem silo
DE3624885A1 (de) * 1986-07-23 1988-01-28 Peters Ag Claudius Entleerungseinrichtung fuer ein schuettgut-silo

Also Published As

Publication number Publication date
DE3835516C1 (enrdf_load_stackoverflow) 1990-02-15
EP0366907A1 (de) 1990-05-09
DE58903660D1 (de) 1993-04-08

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