EP0199886B1 - Misch- und Lagersilo - Google Patents

Misch- und Lagersilo Download PDF

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Publication number
EP0199886B1
EP0199886B1 EP86100358A EP86100358A EP0199886B1 EP 0199886 B1 EP0199886 B1 EP 0199886B1 EP 86100358 A EP86100358 A EP 86100358A EP 86100358 A EP86100358 A EP 86100358A EP 0199886 B1 EP0199886 B1 EP 0199886B1
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EP
European Patent Office
Prior art keywords
chamber
overflow
silo
homogenising
silo according
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
EP86100358A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0199886A1 (de
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6269796&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0199886(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Claudius Peters AG filed Critical Claudius Peters AG
Priority to AT86100358T priority Critical patent/ATE45297T1/de
Publication of EP0199886A1 publication Critical patent/EP0199886A1/de
Application granted granted Critical
Publication of EP0199886B1 publication Critical patent/EP0199886B1/de
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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 mixing and storage silo with a plurality of nested silo chambers, of which an internally arranged silo chamber reaches at least approximately the same height as an outer chamber surrounding it.
  • compositional fluctuations of the raw meal can be reduced by intermediate storage of the raw material with subsequent, continuous and automatic analysis for the control of the raw material type, so that one can be satisfied with mixing silos of lower mixing quality, for example with continuous mixing silos, from which the layers may have different compositions stored goods are mixed in that they are drawn off from alternating discharge streams which are generated by zone-by-unit ventilation of the silo floor and which generally pull the stored goods through from the extraction point to the surface.
  • Continuous mixing silos also have the disadvantage that they have to have a comparatively large volume for a predetermined storage. A sufficient continuous mixing effect occurs only if they are filled to a considerable extent, for example 50%, because it is only then possible to ensure that the exhaust gas flows through a sufficient number of different embedding layers. If the silo is emptied more, there is no longer a sufficient mixing effect. Such a silo can therefore only be used with approximately half its volume for stockpiling. If the continuous mixing silos worldwide have largely displaced the homogenizing silos, it is because of the high energy requirements of the latter.
  • the invention has for its object to provide a mixing and storage silo of the type mentioned, which combines moderate investment and energy expenditure with a high mixing effect including the compensation of long-term fluctuations in composition and with great reliability.
  • the solution according to the invention is that the inner chamber is designed as an overflow homogenization chamber with overflow openings opening into the outer chamber and the outer chamber is designed as a through-flow mixing chamber with alternately ventilated bottom sections.
  • the volume of the outer chamber is expediently larger by a factor of 2 to 6 than that of the overflow homogenization chamber.
  • a vented mixing chamber can be connected downstream of the outer chamber, as is known per se from continuous mixers. While a continuous mixer, possibly with a downstream homogenizing chamber, requires the aforementioned short control intervals for the supply of raw material in the order of a few minutes because of the short throughput time of a mixing drum, they can be extended to the order of one hour and more in the case of the silo according to the invention. Strong fluctuations in the composition are compensated for in the overflow homogenizing chamber, so that the material reaches the external continuous flow mixing chamber with only slight fluctuations in the composition.
  • the relatively short throughput time of a mixing flow can therefore no longer justify any significant fluctuations in the composition, especially if these are further dampened in the mixing chamber, which is expediently designed as a post-homogenization chamber. Nevertheless, it is possible to effectively dampen long-term fluctuations because the total throughput time is considerable.
  • the achievable damping length depends on the capacity. When using the silo for cement raw meal, for example, it is expedient to set the capacity of the overflow homogenization chamber to a throughput of approximately 10 to 12 hours.
  • the low investment for the silo according to the invention results in several ways. On the one hand, a mixed bed premixing system can be completely dispensed with or significantly reduced. Secondly, automatic analyzers that are prone to failure can be eliminated len because measurements are only necessary at longer intervals and can therefore be carried out easily by hand, which is particularly important in less developed countries. Thirdly, the size of the silo itself can be significantly reduced. In the case of continuous mixing silos which are to be replaced by the silo according to the invention, a sufficient mixing function can only be expected if the silo space is at least about half full, because it is only then possible to ensure that a mixing tray contains a sufficient number of different layers runs through.
  • the rest of the stored goods cannot be emptied without considerable loss of mixing quality - in normal operation, therefore, not at all.
  • the capacity of the silo is therefore only available with around half of it.
  • the full volume of the silo according to the invention is available as storage capacity because both the overflow homogenization chamber and the outer flow-through mixing chamber can be completely emptied thanks to the good mixing of the material contained therein.
  • the construction is simple because no separate conveying devices are required for the transport of the goods from the inner to the outer chamber, because the goods are transported by overflow.
  • the overflow homogenizing chamber is much smaller than a homogenizing silo, which is dimensioned as such for the entire storage capacity.
  • the overflow homogenization chamber can be operated in a very energy-saving manner due to weak ventilation according to DE-OS 32 45 542. Even in comparison with a conventional homogenizer silo, which does not have the full storage capacity itself, but is connected to a storage silo, the energy consumption is lower because the transport performance for the transfer of the goods from the homogenizer chamber into the surrounding continuous flow mixing chamber is eliminated.
  • the silo according to the invention also enables greater reliability of the overall system, because the transport of raw material from the break to the mill, including the required analysis systems, is less susceptible to faults and can therefore work reliably and at full capacity even in companies in which no highly qualified personnel are available.
  • the silo as such also works more reliably because maintenance work can be carried out both in the homogenizing chamber and in the continuous flow mixing chamber while the silo is in operation. This is achieved thanks to the feature of the invention that the goods can be fed to and removed from the two chambers bypassing the other. Both chambers can also be emptied independently of one another and, if necessary, even take over the mixture on their own in emergency operation.
  • the continuous flow mixing chamber is followed by a post-mixing chamber, this is expediently vented in order to improve the material flow from the continuous flow mixing chamber.
  • It can be provided within the outer chamber in the bottom area thereof, for example as an annular chamber which surrounds the inner silo wall.
  • it can also be arranged underneath the overflow homogenization chamber, generally still having enough space for the clear and easily controllable arrangement of the extraction elements such as slides, channels, weighing containers etc.
  • the post-mixing chamber is expediently designed as a post-homogenization chamber, i.e. . H. provided with devices for so strong and possibly changing soil air supply that the material contained therein is set into a vigorous mixing movement.
  • a feed tube extends from above to below the normal operating level.
  • the material feed can expediently be switched over from the overflow homogenization chamber to the outer chamber.
  • the device provided for this purpose expediently consists of a feed branch above a slide in a feed pipe leading to the overflow homogenization chamber, so that when the slide is closed, the material passes from the feed pipe into the branch to the outer chamber.
  • the feed branch can start from a floor-ventilated space in which a feed feed pipe opens from above, while the feed pipe leading to the overflow homogenization chamber with a larger diameter goes out below, so that during normal operation the material flowing in from above is completely discharged through the lower feed pipe is, while, when the slide in the feed pipe is closed, the pent-up material is fluidized due to the ventilation of the chamber and can flow into the branches.
  • the changing ventilation rhythm in the overflow homogenization chamber and in the outer continuous flow mixing chamber is coordinated with one another in such a way that the material freshly flowing out of the overflow homogenization chamber does not reach an active discharge stream directly.
  • a device can be provided for controlling the air supply to floor ventilation devices in the overflow homogenization chamber and the outer chamber, which is set up for ventilation offset in the two chambers on the circumference.
  • any floor area in the overflow homogenization chamber in the outer chamber is ventilated, two of these are separated by approximately 90 ° each, and 180 ° to one another, staggered floor areas ventilated.
  • the pass-through homogenizing chamber 4 has on its bottom 6 ventilation devices which, according to the proven, energy-saving method, cause a circulating mixing movement in the material contained therein.
  • Overflow openings 7 are provided above the more ventilated floor zones in the uppermost region of the wall, through which the fluidized material, which is driven higher due to increased ventilation, can partially flow into the outer chamber 5 in the sense of the arrows shown.
  • the material 4 is fed to the chamber 4 through a feed pipe 8, which ends below the uppermost medium product level, so that the material flowing in cannot short-circuit reach the overflow opening.
  • the feed pipe 8 originates from a space 10 provided with floor ventilation devices 9, in which a feed pipe 11 opens centrally above the enlarged opening of the feed pipe 8, so that the supplied material normally passes into the feed pipe 8 without loss.
  • a feed pipe 11 opens centrally above the enlarged opening of the feed pipe 8, so that the supplied material normally passes into the feed pipe 8 without loss.
  • the slide 12 located therein is closed, the material accumulates in the space 10, is fluidized there and then flows through the branch lines 13 to the outer chamber 5.
  • a single slide 12 thus allows the material to be supplied either to the inner chamber or the outer chamber or to both partially.
  • a plurality of passage openings 15 is provided to a discharge chamber, through which the material can be withdrawn from the outer chamber in the region of the ventilated floor zone.
  • the discharge chamber is designed as a relaxation chamber 16, which is vented through pipes 17 and in which the material rises under the ventilation pressure, as shown, in order to flow into discharge lines 18, which feed it to a weighing container, from which it is piped 19 and conveyor trough 20 can be withdrawn to the outside.
  • the material can also be removed directly from the inner chamber 4 via line 21 or flow bypassing the weighing container through line 22 from the discharge chamber 16 of the conveyor trough 20.
  • the upper ends of the silo chambers 4 and 5 are at the same height; however, the inner chamber 4 is shorter, so that there is space for the trigger chamber 16 and the trigger members in the height region remaining next to the outer chamber 5.
  • the embodiment according to FIG. 2 differs from the one explained above by the absence of the weighing container and by the indication of the compressors 23 that the compressed air is different. Provide tension for different floor areas.
  • the embodiment according to FIG. 3 is the same as that according to FIG. 1.
  • the extraction chamber is designed as an annular post-homogenization chamber 24, it differs from the chamber used only for relaxation in the embodiment according to FIG. 1 due to their size and such ventilation devices that cause a circulation movement in the chamber.
  • the mixing effect in this chamber and its filling capacity can increase the mixing effect considerably.
  • the inner chamber 4 and the outer chamber 5 are of the same height. For a given capacity, this means lower overall height and larger diameter, which is often desirable in view of the least possible visual impact on the environment.
  • a relaxation chamber 25 runs around the inner wall 2 in an annular manner, to which the material withdrawn from the outer chamber 5 flows.
  • the chambers 16, 24 and 25 have the function of a post-mixing chamber, the post-mixing depending on the strength of the ventilation and size of the chamber being able to be increased until post-homogenization.
  • the volume ratio of the inner to the outer chamber is advantageously in the range from about 1: 2 to 1: 4.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Storage Of Harvested Produce (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP86100358A 1985-05-03 1986-01-13 Misch- und Lagersilo Expired EP0199886B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100358T ATE45297T1 (de) 1985-05-03 1986-01-13 Misch- und lagersilo.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3516014 1985-05-03
DE19853516014 DE3516014A1 (de) 1985-05-03 1985-05-03 Misch- und lagersilo

Publications (2)

Publication Number Publication Date
EP0199886A1 EP0199886A1 (de) 1986-11-05
EP0199886B1 true EP0199886B1 (de) 1989-08-09

Family

ID=6269796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100358A Expired EP0199886B1 (de) 1985-05-03 1986-01-13 Misch- und Lagersilo

Country Status (4)

Country Link
EP (1) EP0199886B1 (da)
AT (1) ATE45297T1 (da)
DE (2) DE3516014A1 (da)
DK (1) DK166603B1 (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933314A1 (de) * 1989-10-05 1991-04-11 Krupp Polysius Ag Mehrkammersilo
DE4207578A1 (de) * 1992-03-10 1993-09-16 Krupp Polysius Ag Siloeinrichtung
DE102009015880A1 (de) * 2009-04-01 2010-10-14 FLSmidth MÖLLER GmbH Großraumsilo für die Lagerung von staubförmigem oder körnigem Schüttgut

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1138608B (de) * 1960-09-07 1962-10-25 Peters Ag Claudius Verfahren und Einrichtung zum pneumatischen Mischen von staub-foermigem oder feinkoernigem trockenem Gut
DE3002030A1 (de) * 1980-01-21 1981-07-23 Krupp Polysius Ag, 4720 Beckum Pneumatisches mischsilo
DE3015068C2 (de) * 1980-04-18 1984-12-13 Claudius Peters Ag, 2000 Hamburg Mehrfachsilo
DE3022346C2 (de) * 1980-06-14 1982-07-08 Claudius Peters Ag, 2000 Hamburg Mischsilo für Schüttgut
DE3245542A1 (de) * 1982-12-09 1984-06-14 Claudius Peters Ag, 2000 Hamburg Mischsilo
US4486101A (en) * 1983-05-09 1984-12-04 Brar Gurdarshan S Apparatus for blending particulate materials

Also Published As

Publication number Publication date
EP0199886A1 (de) 1986-11-05
DK201986A (da) 1986-11-04
DE3516014A1 (de) 1986-11-06
DK166603B1 (da) 1993-06-21
ATE45297T1 (de) 1989-08-15
DE3664874D1 (en) 1989-09-14
DK201986D0 (da) 1986-05-02

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