EP0262400B1 - Vorrichtung zum Mischen von Schüttgut in einem Bunker - Google Patents

Vorrichtung zum Mischen von Schüttgut in einem Bunker Download PDF

Info

Publication number
EP0262400B1
EP0262400B1 EP87112451A EP87112451A EP0262400B1 EP 0262400 B1 EP0262400 B1 EP 0262400B1 EP 87112451 A EP87112451 A EP 87112451A EP 87112451 A EP87112451 A EP 87112451A EP 0262400 B1 EP0262400 B1 EP 0262400B1
Authority
EP
European Patent Office
Prior art keywords
insert
bulk material
bunker
wall
closing element
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
EP87112451A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0262400A1 (de
Inventor
Hans Dr. Brehm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0262400A1 publication Critical patent/EP0262400A1/de
Application granted granted Critical
Publication of EP0262400B1 publication Critical patent/EP0262400B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B01F25/80—Falling particle mixers, e.g. with repeated agitation along a vertical axis
    • 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
    • B01F25/80—Falling particle mixers, e.g. with repeated agitation along a vertical axis
    • B01F25/83—Falling particle mixers, e.g. with repeated agitation along a vertical axis with receptacles provided with fixed guiding elements therein, e.g. baffles; Cross-mixers comprising crossing channels for guiding the falling particles

Definitions

  • the invention relates to a device for mixing bulk material in a bunker according to the preamble of claim 1.
  • a bulk material formed from a mixture tends to separate in a bunker.
  • Various solutions are known for removing a mixed bulk material from a bunker, in which different parts of the bulk material are removed from different parts of the bunker.
  • it is known from DE-A-1217756 to form a staggered series of discharge openings in the bunker by means of a plurality of coaxial tubes, through which various parts of the bulk material flow, which mix in an outlet part.
  • GB-A-2056296 From GB-A-2056296 it is known to make an annular gap adjustable.
  • the device according to GB-A-2056296 has a total of two ring gaps.
  • the upper annular gap is so wide that a jam of the product at the lower annular gap immediately throttles the flow rate of the product from the peripheral area of the bunker.
  • the flow rate of the product from the peripheral area of the bunker therefore depends on the level of the product in the bunker.
  • This known device is therefore a pure gravity funnel, which lacks an independent regulation for the respective flow rates of the bulk material originating from the peripheral or axial region of the bunker.
  • No control device is provided in the central mixer outlet for the flow rate of the bulk material originating from the axial region of the bunker.
  • the function of the height-adjustable control device of this known device depends on the level of the product in the bunker. For this reason, the mixing ratio obtained also depends on the level of the product in the bunker, ie no constant outlet flow of the product is guaranteed. The result is unsatisfactory. Good mixing quality can only be achieved by regulating constant flow rates of the bulk material originating from the peripheral or axial area of the bunker.
  • the general problem to be solved is that it is difficult to continuously mix solids.
  • Mixed bulk material for example a mixed granulate
  • Even mixed bulk goods tend to separate in the bunker.
  • the coarser and heavier parts flow preferentially to the outside, the smaller and lighter parts preferentially to the inside.
  • these parts of the bulk material are to be reunited in accordance with the original proportions and these proportions are to be restored, which means different dosages for the different types of bulk materials requires different parts of the respective bulk goods.
  • the solution to these problems should ultimately be compatible with continuous treatment of the bulk material.
  • the flow velocities of the parts of the bulk material at the annular gap and at the second closure member can be adjusted automatically as a function of one another and from the flow velocity of the entire bulk material at the first closure member.
  • the dependency rules can be selected so that they correspond to the relevant properties of the bulk material and in particular to the segregation and flow properties.
  • the bulk material runs largely freely at the annular gap, ie without pressure load. Therefore, the flow at the annular gap stops when the level of the bulk material in the discharge part rises so that the annular gap comes to lie below this level. This occurs when the bulk material jams in the outlet part, either because the first closure member on the outlet part reduces the entire outlet, or because a relatively large amount of bulk material flows through the tube at the insert. The same can be said in relation to the outlet at the lower end of the tube at the insert, the flow rate here also being adjustable using the second slide.
  • the level of the bulk material in the outlet section thus regulates the flow speed through the annular gap and through the tube on the insert and is itself controlled by the slide valves and regulated by the position of the height adjustable tube.
  • the setting of the first closure element at the outlet is a size given by external circumstances and not a setting parameter in the actual sense.
  • two other parameters are still available to adjust the flow velocities of the peripheral bulk material flowing through the annular gap and the central bulk material flowing through the tube overall and relative to each other.
  • the second closure element influences the flow of the central bulk material.
  • the height of the pipe and the setting of the second closing element thus represent two parameters with which the entire flow and its proportions can be set.
  • the entire flow to the setting of the first closure element on the outlet part can be carried out with constant proportions be adjusted.
  • the outlet of the bulk material can thus be adapted to the variability of the product properties of the bulk material, both in the total amount (through the first closure member) and in relation to the proportions (through the second closure member and the pipe).
  • This enables either cross-mixing or longitudinal mixing of the bulk material or a combination of these types of mixing in any proportions (i.e. with any "intensity").
  • the device according to the invention is therefore particularly well suited to compensating for fluctuations in production (fluctuations in quantity and / or quality, both occurring simultaneously and simultaneously) and for homogenizing bulk material.
  • the device according to the invention can be used both in continuous operation and in batch operation.
  • the mixing process basically begins when the bulk material is poured into the bunker.
  • FIG. 1 shows a view of a device according to the invention in longitudinal section.
  • a bunker 1 contains a bulk material 2 that is to be mixed in a predetermined manner when it is drawn off.
  • the bulk material tends to segregate in the bunker or when it is filled into the bunker, for example in relation to the particle size, and it for example, the original composition is to be restored when pulling off.
  • the bunker 1 is, for example, essentially cylindrical and provided with a coaxially arranged conical bottom 3.
  • An outlet part 4 is arranged below this conical base 3, adjoining it and coaxially with it.
  • the outlet part 4 forms the tip of the conical bottom 3, as shown.
  • a closure element 5 which controls the flow rate of the entire bulk material drawn off.
  • the closure member 5 is, for example, a slide.
  • An insert 6 is arranged in the lower region of the conical base 3 and coaxially with it. Between the inner wall 7 of the bottom 3 and the outer wall 8 of the insert 6 there is an annular gap 9 through which the bulk material can flow from the peripheral part of the bunker 1 or the bottom 3 to the outlet part 4.
  • the inner wall 10 of the insert 6 is flared upwards in the upper region of the insert 6, so that the insert 6 forms a funnel there, in which the bulk material flows from the central or axial part of the bunker 1 or the bottom 3 to the outlet part 4 can.
  • the inner wall 11 of the insert 6 is essentially cylindrical.
  • a tube 12 is coaxially formed and arranged on this inner wall 11 at the lower region of the insert 6.
  • the tube 12 encloses the lower area of the insert 6 and is vertically displaceable relative to the inner wall 11 at the lower area of the insert 6, the corresponding movement of the tube 12 being brought about and controlled from the outside, ie from outside the bunker 1, by means not shown.
  • the relative lengths of the inner wall 11 and the tube 12 are chosen such that the displacement range of the tube 12 allows the lower end of the tube 12, down to to be moved below the level of the annular gap 9 and up to above the level of the annular gap 9.
  • a second closure member 13 is arranged at the lower area of the insert 6, but on the inner wall 11 but in the vicinity of the transition between the inner wall 10 and the inner wall 11, i.e. in the vicinity of the transition between the conical upper region and the cylindrical lower region of the insert 6, .
  • This second closure member 13 is, for example, a slide. It doses the flow rate of the bulk material through the insert 6 and is controlled from outside by means not shown, i.e. actuated and controlled from outside the bunker 1.
  • the outlet part 4 is arranged on the bottom 3 in such a way that the upper circumference of the outlet part 4 essentially coincides with the annular gap 9, i.e. the bulk material flowing through the annular gap 9 falls into the outlet part 4 without any noticeable discontinuity in the wall of the bottom.
  • the means for displacing the tube 12 and the means for adjusting the second closure element 13 can be controlled as a function of the position of the tube 12, the second closure element 13 and the first closure element 5 arranged on the outlet part 4.
  • the purpose of this control and mutual dependency is to adapt the flow rates of the parts of the bulk material 2 at the annular gap 9 and on the second closure member 13 to one another and to the flow rate of the entire bulk material at the first closure member 5.
  • the control of the flow velocities is adjustable depending on the properties of the bulk material 2.
  • the bulk material 2 when the bulk material 2 is withdrawn, it can be withdrawn, as desired, predominantly from the periphery of the bunker 1, predominantly from the center of the bunker 1 or approximately uniformly everywhere from the bunker 1 in order to achieve the desired mixing and composition of the bulk material 2.
  • the free upper surface of the bulk material 2 in the bunker 1 optionally forms a funnel 14 or an annular depression 15, or it can also remain flat, as shown at 16.
  • the device can be supplemented by supply lines 17a, 17b, 17c, 17d of compressed air or compressed gas at suitable points of the bunker 1, for example at the transition from the cylindrical body of the bunker 1 to its conical bottom 3 behind suitable mudguards 18 or on the funnel-shaped conical expansion of the inner wall 10 of the insert 6 by means of ventilation surfaces.
  • the supply of compressed air or compressed gas can serve, among other things, to loosen the bulk material 2 and to improve its flow properties. It is thus achieved that the device according to the invention can be used for processing both free-flowing bulk material (“granulate”) and non-free-flowing bulk material (“powder”).
  • the compressed air or gas can be used to heat or cool the bulk material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Basic Packing Technique (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
EP87112451A 1986-09-03 1987-08-27 Vorrichtung zum Mischen von Schüttgut in einem Bunker Expired - Lifetime EP0262400B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3565/86 1986-09-03
CH3565/86A CH670439A5 (enrdf_load_stackoverflow) 1986-09-03 1986-09-03

Publications (2)

Publication Number Publication Date
EP0262400A1 EP0262400A1 (de) 1988-04-06
EP0262400B1 true EP0262400B1 (de) 1991-10-30

Family

ID=4258745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112451A Expired - Lifetime EP0262400B1 (de) 1986-09-03 1987-08-27 Vorrichtung zum Mischen von Schüttgut in einem Bunker

Country Status (3)

Country Link
EP (1) EP0262400B1 (enrdf_load_stackoverflow)
CH (1) CH670439A5 (enrdf_load_stackoverflow)
DE (1) DE3774231D1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2424568B2 (es) 2013-06-04 2014-04-28 Universidad De La Rioja Carro alimentador para máquina compresora y uso del mismo

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029986A (en) * 1960-03-21 1962-04-17 Union Carbide Corp Blending apparatus for free-flowing granular materials
DE2742904C2 (de) * 1977-09-23 1983-08-11 Wäschle Maschinenfabrik GmbH, 7980 Ravensburg Vorrichtung zum pneumatischen Mischen von Schüttgut
DE2812092A1 (de) * 1978-03-20 1979-10-04 Peters Ag Claudius Vorrichtung zum schwerkraftmischen von pulverfoermigem bis koernigem gut
US4286883A (en) * 1979-08-20 1981-09-01 Jenike & Johanson, Inc. Blending apparatus for bulk solids

Also Published As

Publication number Publication date
DE3774231D1 (de) 1991-12-05
EP0262400A1 (de) 1988-04-06
CH670439A5 (enrdf_load_stackoverflow) 1989-06-15

Similar Documents

Publication Publication Date Title
DE2813865C2 (de) Mischvorrichtung zum kontinuierlichen Mischen von Pulvermaterialien mit einer Flüssigkeit
DE2332948C2 (de) Verfahren und Vorrichtung zum Mischen von teilchenförmigen Feststoffen
DE69733260T2 (de) Verfahren und vorrichtung zum dosieren einer pulverförmigen substanz sowie anordnung mit einer vielzahl solcher vorrichtungen
DE69713947T2 (de) Wirbelbettsortierer
DE4317705B4 (de) Verfahren und vorrichtung zum zuführen von pulverförmigen substanzen und reaktionsgasen in einen schmelzofen
DD250869A5 (de) Verfahren und vorrichtung zum herstellen bituminoeser gemische
DE68926820T2 (de) Pneumatische Fördervorrichtung für verdichtete pulverförmige oder körnige Materialien
DE1296581B (de) Schwerkraft-Trennvorrichtung
EP0262400B1 (de) Vorrichtung zum Mischen von Schüttgut in einem Bunker
AT405942B (de) Verfahren zur reduktion von feinerz sowie anlage zur durchführung des verfahrens
DE2724928A1 (de) Silo zur mischung von eingelagertem material
DE2557176B2 (de) Vorrichtung zur Beschickung von elektrischen Schmelzöfen
DE3888249T2 (de) Entleerungssystem für Behälter.
EP1156892A1 (de) Kegelsichter und verfahren zum sichten von eingeschränkt oder nicht rieselfähigem schüttgut
DE1458612A1 (de) Schwebe- und Sinkverfahren zum Trennen von Feststoffgemischen nach der Wichte sowie Vorrichtung zur Durchfuehrung dieses Verfahrens
EP0632745B1 (de) Verfahren zum dosieren und vorrichtung hierfür
DE3102167A1 (de) Vorrichtung zum aufteilen eines fluids oder fluidisierten hauptstroms zwischen mehreren nebenleitungen
DE7906799U1 (de) Absetz- oder eindickvorrichtung
DE1035907B (de) Vorrichtung zur Einbringung feinteiliger Feststoffe in fluessiges Metall
DE19818738A1 (de) Verfahren zum Verringern der Feststoffkonzentration in einer Dispergiervorrichtung und Vorrichtung zur Durchführung des Verfahrens
DE3318739C1 (de) Aufstromklassierer
DE29608490U1 (de) Abfüllkopf für Vertikal-Dosierer
EP0258820B1 (de) Vorrichtung zum Mischen von Schüttgut in einem Bunker
DE2211127A1 (de) Mischvorrichtung
DE2549106A1 (de) Silo zur aufnahme von pneumatisch foerderbarem schuettgut

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB LU NL

17P Request for examination filed

Effective date: 19880908

17Q First examination report despatched

Effective date: 19900615

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB LU NL

REF Corresponds to:

Ref document number: 3774231

Country of ref document: DE

Date of ref document: 19911205

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930805

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930817

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930823

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930831

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930909

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19930928

Year of fee payment: 7

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940827

Ref country code: GB

Effective date: 19940827

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19940831

BERE Be: lapsed

Owner name: BREHM HANS

Effective date: 19940831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950301

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940827

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950428

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST