EP0097775A2 - Procédé de mélange de matière fine - Google Patents

Procédé de mélange de matière fine Download PDF

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Publication number
EP0097775A2
EP0097775A2 EP83103367A EP83103367A EP0097775A2 EP 0097775 A2 EP0097775 A2 EP 0097775A2 EP 83103367 A EP83103367 A EP 83103367A EP 83103367 A EP83103367 A EP 83103367A EP 0097775 A2 EP0097775 A2 EP 0097775A2
Authority
EP
European Patent Office
Prior art keywords
silo
zone
cover
discharge chamber
conveyor
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.)
Ceased
Application number
EP83103367A
Other languages
German (de)
English (en)
Other versions
EP0097775A3 (fr
Inventor
Norbert Dipl.-Ing. Ahrens
Helmut Daniel
Gerhard Dipl.-Ing. Schacknies
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius 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 Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0097775A2 publication Critical patent/EP0097775A2/fr
Publication of EP0097775A3 publication Critical patent/EP0097775A3/fr
Ceased 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
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • 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 method for mixing fine material using a mixing syllable, to which the material to be mixed is added in the upper region and which contains a discharge chamber provided with a cover in the center of the silo bottom, the material being pneumatically loosened in the region surrounding the discharge chamber is conveyed into the outlet chamber.
  • a method of the type mentioned above is known for example from DE-OS 26 57 597.
  • DE-OS 26 57 597 it has been shown many times that the material located above the cover of the discharge chamber does not participate sufficiently in the mixing process, since it is not caught by the discharge streams generated by the pneumatic loosening devices.
  • Mixing methods are also known (DE-PS 635 202 and 669 206), in which in mixing silos of a substantially different type (namely without an outlet chamber provided in the center of the silo bottom and provided with a cover) the material loosened pneumatically in the lower region of the silo Riser pipes are conveyed back into the upper area of the silo, where they are added again together with the fresh material.
  • the invention is therefore based on the object To design mixing processes of the type mentioned at the outset in such a way that long-term fluctuations in the material to be mixed are effectively damped or compensated for with little structural and operational expenditure, in particular without a substantial enlargement of the mixing silo.
  • this object is achieved in that material is drawn off from the zone of the silo located above the cover of the discharge chamber and is again placed in the upper region of the silo in an outer cross-sectional zone which surrounds an inner cross-sectional zone which is intended for feeding the fresh material.
  • the invention is based on the knowledge that, in the case of a mixing silo provided in the floor area with pneumatic loosening devices and a central discharge chamber, the actual mixing action takes place only in the loosening zone present above the loosening devices, in contrast to the fact that a large part of the silo interior space, in particular the one above, in the previously used operating method zone of the outlet chamber cover and the upper layers of the material do not participate in the mixing effect.
  • By pulling well from a zone that has already sunk deeply into the silo but is not very active (namely above the cover of the outlet chamber) and then relinquishing it to the upper area of the silo goods that have been in the silo for a long time become in this way in spatial Bring proximity to freshly posted goods. This is an important prerequisite for the compensation of long-term fluctuations without enlarging the silo space.
  • the recycled material which is again fed to the upper region of the silo is not removed from a bottom zone which is intensely fluidized by pneumatic loosening devices and is anyway already participates in the mixing effect. Rather, the removal of material from a zone of the lower silo area which is not very active in terms of mixture or is even dead is essential for the method according to the invention.
  • a zone is in mixing silos, which have a central discharge chamber provided with a cover, especially the space above the cover, in which standing material bridges are not infrequent.
  • the recycled material is expediently not output randomly in the upper region of the silo.
  • the process according to the invention is withdrawn from the zone of the silo above the cover of the discharge chamber in such an amount per unit of time that a flow of material is formed in the silo from the outer feed zone in the upper region to the central discharge zone above the cover of the discharge chamber, which flow is from a flow of material is penetrated, which runs from the inner feed zone in the upper area to the pneumatically loosened zone in the area surrounding the discharge chamber.
  • the mixing silo 1 shown schematically in FIG. 1 contains an inner conveyor spider 2 for the fresh material to be mixed and an outer conveyor spider 3 for recycled material in the upper region.
  • the construction of such conveyor spiders is known and is therefore not illustrated here in detail: Pneumatically ventilated conveyor troughs emanate from a central inlet point and throw the material into the interior of the silo at their ends.
  • An outlet chamber 4 is provided in the center of the silo floor, which has a cover 5 and is provided with a device 6 for floor ventilation.
  • the mixed material is discharged from the discharge chamber 4 as indicated by arrows 7.
  • the area of the silo floor surrounding the outlet chamber 4 is provided with devices 8 for floor ventilation. These devices 8 are örderrinnen in a known manner inwardly inclined pneumatic F, which are covered on their top part, wherein entry to the non-covered bodies pneumatically loosened well into the conveying channels and passes through openings 9 in the outlet chamber. 4 The bottom of the outlet chamber 4 is arranged lower than the bottom of the mixing silo 1.
  • a pneumatic conveyor trough 10 Above the cover 5 of the outlet chamber 4 there is a pneumatic conveyor trough 10, the inlet funnel 11 of which is located approximately in the center of the silo cross section. This inlet funnel 11 can be partially covered by a cover 12.
  • the conveyor trough 10 is suitably covered over its entire length.
  • the conveyor trough 10 is led out of the interior of the mixing silo 1 and opens into a pneumatic vertical conveyor 13 which is connected to a compressed air line 14 and is connected via a pneumatic delivery line 15 to the outer conveyor spider 3 in the upper region of the mixing silo 1.
  • a central cylinder 16 is provided in the upper part of the silo, which narrows the cross-sectional area of the silo which is supplied by the two conveyor spiders 2 and 3.
  • the mean residence time of the individual material particles in the mixing silo can be extended in the desired manner. If there are no long-term fluctuations in the raw material, the output of the pneumatic vertical conveyor 13 can, if desired, be reduced and thus the average time of stay of the goods in the silo can be shortened.
  • FIG. 2 A further possibility of influencing the mean residence time of the material in the mixing silo is shown in FIG. 2.
  • a connecting line 19 is provided between the conveyor trough 10 and the outlet chamber 4, in which a material lock 20 is located.
  • the M aterialschleuse 20 may be of the silo from above the cover 5 withdrawn from the inlet hopper 11 Good be introduced directly into the outlet chamber 4 in this manner an adjustable part.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Accessories For Mixers (AREA)
EP83103367A 1982-06-29 1983-04-06 Procédé de mélange de matière fine Ceased EP0097775A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3224196 1982-06-29
DE19823224196 DE3224196A1 (de) 1982-06-29 1982-06-29 Verfahren zum mischen von feingut

Publications (2)

Publication Number Publication Date
EP0097775A2 true EP0097775A2 (fr) 1984-01-11
EP0097775A3 EP0097775A3 (fr) 1985-07-10

Family

ID=6167109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103367A Ceased EP0097775A3 (fr) 1982-06-29 1983-04-06 Procédé de mélange de matière fine

Country Status (5)

Country Link
US (1) US4491419A (fr)
EP (1) EP0097775A3 (fr)
DE (1) DE3224196A1 (fr)
ES (1) ES522275A0 (fr)
ZA (1) ZA832686B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004021612A1 (de) * 2004-03-15 2005-10-06 Dietrich Engineering Consultants S.A. Verfahren und Vorrichtung zum pneumatischen Behandeln pulverförmiger Stoffe
ES2311258T3 (es) * 2006-09-08 2009-02-01 Ibau Hamburg Ingenieurgesellschaft Industriebau Mbh Metodo y sistema para el llenado de silos de gran capacidad de almacenamiento con material fluidizable.
US9833755B2 (en) * 2015-05-27 2017-12-05 The Young Industries, Inc. System for mixing/blending fine bulk materials
US10188993B1 (en) * 2018-07-17 2019-01-29 Herbert D. Knudsen Blender
CN112588140A (zh) * 2020-11-25 2021-04-02 浙江炜烨晶体纤维有限公司 一种制备莫来石纤维基多孔隔热瓦的装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172736A (en) * 1965-03-09 figure
DE635202C (de) * 1935-08-17 1936-09-12 Polysius Akt Ges G Vorrichtung zum Mischen von mehlfoermigem oder staubfoermigem Gut durch Fuehren im Kreislauf
DE669206C (de) * 1937-02-10 1938-12-19 Polysius Akt Ges G Vorrichtung zum Mischen von staubfoermigem oder pulverfoermigem Gut
DE902929C (de) * 1951-04-18 1954-01-28 Richard Heim Einrichtung zum Umwaelzen bzw. Mischen von mehligen, pulverfoermigen bzw. koernigen Stoffen
DE1034464B (de) * 1954-01-18 1958-07-17 Solvay Werke Gmbh Vorrichtung zum Mischen von koernigem Gut mit mehreren ausserhalb des Mischsilos zusammengefuehrten Ablaufrohren
DE1849891U (de) * 1961-10-12 1962-04-12 Miag Muehlenbau & Ind Gmbh Behaelter zum mischen von staubgut.
CH412811A (de) * 1962-11-06 1966-05-15 Ruetschi Ag Pumpenbau K Verfahren zum Mischen und Einrichtung zur Durchführung des Verfahrens
DE1240376B (de) * 1964-04-30 1967-05-11 Peters Ag Claudius Verfahren und Vorrichtung zum Mischen eines kontinuierlichen Materialstromes eines schuettfaehigen Gutes
FR1555966A (fr) * 1968-02-12 1969-01-31
DE2121616C3 (de) * 1971-05-03 1975-07-03 Claudius Peters Ag, 2000 Hamburg Vorrichtung zum Mischen von Schüttgut und Verfahren zu Ihrem Betrieb
DE2350786C2 (de) * 1973-10-10 1975-09-25 Polysius Ag, 4723 Neubeckum Einrichtung zum kontinuierlichen pneumatischen Mischen und/oder Homogenisieren sowie pneumatischen Hochfördern von feinkörnigem oder staubförmigem Gut
US4042220A (en) * 1975-10-02 1977-08-16 E. I. Du Pont De Nemours And Company Apparatus for solids blending
DE2657597C2 (de) * 1976-12-18 1982-02-04 Claudius Peters Ag, 2000 Hamburg Schüttgutsilo mit Homogenisierkammer
DE2657596C2 (de) * 1976-12-18 1982-08-26 Claudius Peters Ag, 2000 Hamburg Mischkammersilo für Schüttgut
DE2742904C2 (de) * 1977-09-23 1983-08-11 Wäschle Maschinenfabrik GmbH, 7980 Ravensburg Vorrichtung zum pneumatischen Mischen von Schüttgut
DE2949791A1 (de) * 1979-12-11 1981-06-19 Krupp Polysius Ag, 4720 Beckum Vorrats- und mischsilo fuer schuettgut
DE3010499C2 (de) * 1980-03-19 1983-03-03 Johannes Möller Hamburg GmbH & Co KG, 2000 Hamburg Großraumsilo für die Lagerung und Homogenisierung von mehlförmigen Schüttgütern
DE3029393A1 (de) * 1980-08-01 1982-03-11 Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg Schwerkraft-umwaelzmischer

Also Published As

Publication number Publication date
EP0097775A3 (fr) 1985-07-10
ES8405639A1 (es) 1984-06-16
ZA832686B (en) 1984-01-25
ES522275A0 (es) 1984-06-16
US4491419A (en) 1985-01-01
DE3224196A1 (de) 1983-12-29

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHACKNIES, GERHARD, DIPL.-ING.

Inventor name: DANIEL, HELMUT

Inventor name: AHRENS, NORBERT, DIPL.-ING.