EP0632745B1 - Procede de dosage et dispositif approprie a cet effet - Google Patents

Procede de dosage et dispositif approprie a cet effet Download PDF

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Publication number
EP0632745B1
EP0632745B1 EP94903715A EP94903715A EP0632745B1 EP 0632745 B1 EP0632745 B1 EP 0632745B1 EP 94903715 A EP94903715 A EP 94903715A EP 94903715 A EP94903715 A EP 94903715A EP 0632745 B1 EP0632745 B1 EP 0632745B1
Authority
EP
European Patent Office
Prior art keywords
gas
substance
fluidised bed
fluidized bed
liquid
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
EP94903715A
Other languages
German (de)
English (en)
Other versions
EP0632745A1 (fr
Inventor
Frank Goedicke
Wilhelm Herzmann
Arthur Ruf
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.)
Buehler AG
Original Assignee
Buehler 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 Buehler AG filed Critical Buehler AG
Publication of EP0632745A1 publication Critical patent/EP0632745A1/fr
Application granted granted Critical
Publication of EP0632745B1 publication Critical patent/EP0632745B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/892—Forming a predetermined ratio of the substances to be mixed for solid materials, e.g. using belts, vibrations, hoppers with variable outlets or hoppers with rotating elements, e.g. screws, at their outlet
    • 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
    • B01F33/406—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles with gas supply only at the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/711—Feed mechanisms for feeding a mixture of components, i.e. solids in liquid, solids in a gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/833—Flow control by valves, e.g. opening intermittently

Definitions

  • the invention relates to a method for mixing at least one granular or powdery solid with at least one liquid, and a device for Performing this procedure.
  • a device according to EP-A-0531 758 is for time constant dosing (Priority: 09.09.91; filing date: 18.08.92; publication date: 17.03.93) suggested been, however does not solve the problem of mixing.
  • the invention is therefore based on the object of a precisely metering method and to provide a device therefor.
  • According to the invention are therefore in a method of the type mentioned Features of claim 1 proposed.
  • a particularly important application and configuration of the inventive Process results from the features of claim 2.
  • the mixing is namely particularly homogeneous when all parts of the surface of each particle are on Because of fluidization in the fluidized bed are exposed.
  • a liquid particularly homogeneous mixtures result even when the solid is difficult to mix and tends to clump or stick.
  • Dosing devices for all components involved in a mixture the mixing device can be provided, according to a preferred embodiment
  • the invention proposes that the liquid in the fluidized substance is injected. It has been shown that by this process step a optimal mixing with the fluidized material is achieved.
  • the Invention proposed that the homogenized gas mixture before Mixture with the second substance is additionally supplied with gas, this gas encasing the gas-solid stream flowing to the mixing device and is fed parallel to its direction of flow.
  • this additional gas supply becomes a more or less strong "dilution of the Two-phase mixture reached from the fluidized bed.
  • a particularly effective and therefore precise dosing is after another preferred embodiment of the invention achieved when the speed of the additionally supplied gas encasing the gas-substance mixture stream large as the speed of the gas-mixture flow is provided.
  • the dosage can be particularly effective make the invention when at the outlet opening of the fluidized bed apparatus or in the area of the outlet line, preferably a hollow body Nozzle device is provided as a metering device for the mixing process, the channels for the introduction of additional gas via a porous wall, nozzles etc. of the Has hollow body in or on the homogeneous gas-substance mixture.
  • a hollow body Nozzle device is provided as a metering device for the mixing process, the channels for the introduction of additional gas via a porous wall, nozzles etc. of the Has hollow body in or on the homogeneous gas-substance mixture.
  • the fluidized bed apparatus and the nozzle device preferably with measuring points arranged at a distance from one another electrical or electronic pressure measuring devices or level sensors are equipped, the output signals of a programmable electronic Control are supplied, the output signals for controlling valves, esp. from directional valves and / or pressure relief valves, and preferably from a conveyor for feeding the first substance into the fluid bed apparatus is fed to their control.
  • the dosing device described is sufficient to make small deviations Correct fumigation; to larger deviations correct, it is proposed in a further embodiment of the invention, that the fluidized bed apparatus for one of the programmable Control controllable valve with preselectable Gas pressure can be applied.
  • 1 solid is placed in a fluidized bed apparatus in the form of particles, for example fly ash or a other granular or powdery, especially for lump formation inclining material, from an upstream part of the system 20 via a conveyor, such as a screw 21 or a pneumatic conveyor, fed into the fluidized bed apparatus 1.
  • the upstream system part 20 can, for example, storage containers or a separation and conveyor system exist as it is described, for example, in EP-A-0 168 614.
  • One in the outlet area of the storage tank 20 provided loosening device (not shown), as is usual with silos, can flow out the solid particles, even with different filling levels ensure in the reservoir 20.
  • Conveying the particles can act as a conveyor 21 in particular selected a pneumatic dense phase conveying are proposed, as is also the case in EP-A-0 168 614 becomes.
  • the location of the inlet 21a of the solid particles is appropriate so selected that the momentum forces out of the conveyor 21 neglected solid particles fed into the fluidized bed 2 can be.
  • fluidizing gas G flows out of a Line 19 from bottom to top and swirls the fed Solid particles to form a fluidized bed 2.
  • This Fluidizing base 11 can be designed as a perforated base, however a floor made of porous material would also be conceivable.
  • the gas can In the case of intended mixtures, even from the steam of those to be supplied Liquid, possibly only to achieve a pre-wetting, be educated. With increasing flow velocity the gas loosens the layer more and more, so that the Solid particles in this two-phase system are smaller and larger Change location. From a certain flow velocity, where a bed layer changes into a fluidized bed (Loosening point), the pressure drop in the layer is over the height of which is approximately constant, which, as described below, results in better control of the dosage can be exploited.
  • the fluidized bed area extends from the lower one Limit speed, the loosening speed, up to an upper limit speed, which characterizes it can be that the layer is so loosened that each individual particles unaffected by an adjacent one in the fluid flow hovers.
  • the gas / solid mixture of the fluidized bed 2 behaves largely like a liquid; via the outlet opening 3 in the bottom 11 the fluidized bed apparatus 1 can be homogenized in the fluidized bed 2 present gas / solid mixture 17 into the outlet line 4 "flow out".
  • a pressure difference measurement between a pressure measuring point 12 'just above the fluidization tray 11 and one a further pressure measuring point 12e is provided above the fluidized bed 2. If necessary, however, can be used to determine the amount of solids in the fluidized bed 2 also the pressure difference between sensors 12f and 12f 'and / or 12' are used. Even though These methods take advantage of the special conditions in one Offering fluidized bed, the present invention is not based on this type of measurement of the solids content is restricted; much more this could also be done otherwise, for example by load cells on which the entire fluidized bed apparatus 1 is assembled.
  • the not unproblematic area of the entrance zone is through the ratio of the diameter D of the outlet opening 3 and the Height H and / or the bottom surface of the fluidized bed 2 - with the same Fluidization rate - determined. So it turns out a ratio of D: H equal to 1: 2 as a practical minimum requirement.
  • Larger fluidized bed heights H also have a dampening effect for fluctuations due to the feeding of the solid particles into the fluidized bed over, for example, the Conveyor 21 can result.
  • the Fluidizing nozzle 6 is in the form of an annular channel with a porous one Insert formed, which makes the outlet opening 3 concentric can also be fluidized. This will give you the opportunity created the formation of instabilities just for the Entry zone are characteristic to counteract to a certain extent. It has also been shown that pulling in this way is inhibited by bubbles in the outlet line 4. That's why the speed of the fluidizing nozzle 6 additionally supplied gas is preferably smaller than the speed through the floor 11 of the fluidized bed apparatus 1 flowing gas. Solid bridges, which are preferred especially in the Form area of the outlet opening 3 can be broken open and be solved.
  • the mass flow of the outflowing solid is essentially by the mass of the solid, which is currently in the fluidized bed 2 is located, and by the pressure difference between one Points above the fluidized bed 2 and a point in the immediate to the outlet line 4 subsequent plant part is determined captured by evaluating this data and can be influenced as follows will.
  • An approximate presetting of the outflowing solid mass flow is about the solids content of the fluidized bed 2nd and / or via an increase or decrease in the pressure above the fluidized bed 2 carried out.
  • the solids content as already shown above, determined and via a Control or regulation 34, which is based on the feeding of solid acts in the fluidized bed 2 via the conveyor 21, regulated.
  • the pressure measuring point 12e the pressure in the space above the fluidized bed 2 is determined and this over the, e.g. programmable logic controller or control 34 by operating a valve 35 in the exhaust air line 34 of the fluidized bed apparatus 1 and / or via a valve 33 in a line 31 by controlled addition of a higher Gas level (it can be the same as that Fluidizing gas or another) can be regulated.
  • a higher Gas level it can be the same as that Fluidizing gas or another
  • a higher Gas level it can be the same as that Fluidizing gas or another
  • the pressure at sensor 12e can also be the pressure difference between this sensor 12e and one in the following part of the system, like a mixer 18, located pressure measuring point 12g be used, which is particularly recommended if the pressure in this part of the system or the mixer 18 is process-related Subject to change.
  • the gas supply 5, 8 already mentioned is provided, so is an influence on the solid mass flow rate within extremely short response times.
  • This is in principle by individual, e.g. arranged in a ring on line 4, Realizable nozzles, but is advantageously as a cylindrical gas permeable hollow body 5, e.g. made of ceramic, which is surrounded by an annular gassing channel 8 is.
  • This is connected via a gas line 10 'to the gas line 10 can be connected to the fluidization nozzles 6, likewise charged with fluidizing gas - with valves 13, 13 ', if necessary also directional control valves and / or pressure relief valves, can be provided.
  • a Pressure measuring point 12 may be arranged, together with a arranged near the bottom 11 of the fluidized bed apparatus 1 pressure measuring point 12 'the differential pressure between the fluidized bed 2 in Determined near the ground and the outlet pipe 4 near the outlet opening 3 , where appropriate a piezoresistive differential pressure sensor or two individual piezoresistive pressure transducers can be provided.
  • the measurement data available via the differential pressure measurement can via the already mentioned control 34 with built-in regulator be performed, which in turn the fluidization and / or fumigation of the outflowing gas / solids flow via the gassing channel 8 and / or controls the fluidization nozzle (s) 6 and thus one Regulation of the gas / solids flow enables.
  • pressure measuring points 12a to 12e enable on the one hand control of the porosity and homogeneity of the fluidized bed 2 via a pressure difference measurement within the fluidized bed 2 (12a and 12b).
  • the pressure measuring points 12 'and 12c which are just above and just below of the bottom 11 of the fluidized bed apparatus 1 are arranged Pressure loss across the floor 11 can be measured, so that possible Blockages in the porous base 11 can be recognized in good time.
  • Measurement data based on measurements of the homogeneity in the fluidized bed 2 can both by adjusting the flow velocity of the fluidizing gas as well as via the feed additional fluidizing gas, be it through the fluidizing nozzles 6, the fluidization tray 11 and in particular via the Gas supply line 5, 8 as a regulation for the homogenization of Fluidized bed 2 on the one hand or the outflowing gas / solid stream serve on the other.
  • a mixing device 18 here is only symbolically indicated and in principle on the most varied Way can be formed. For example, the fluidized bed 1 until the height H is reached (which is determined by the sensors is determined in the manner described) filled and in batches in a batching mixer 18 can be emptied.
  • the liquid (s) to be mixed are fed into the system via lines 40 fed to at least one location.
  • the Add one and the same liquid at different times Places possible.
  • the liquid can be sprayed be injected into the fluidized solid, for example also via a hollow mixer shaft 27 and / or also in liquid or vapor form directly into the fluidized bed and / or in the nozzle 28, possibly only for pre-moistening.
  • a liquid line 40 two of which alternatively or cumulatively applicable variants are shown appropriate devices for targeted change in throughput, e.g. a control valve 41 and / or a pump, and Measurement of the amount of liquid added (measuring device 42), which can be of various types, e.g. in the form of a magnetic-inductive Flow meter, an ultrasonic meter or The like. It is also possible to temporarily close these flow meters operate, for example to adjust a basic setting. About the The measured throughputs of liquid and solid are then each according to the requirements of the company, e.g. by influencing of the control valve 41, also a regulation of the amount of liquid performed.
  • the mixing device can be of various types Be trained.
  • the application of a batch operation is cheap for fly ash because fly ash in practice very different amounts are transported away in time.
  • a mixing device 18 that can be different in itself, it is easily possible to use them in other contexts, for example for dosing in scales. Furthermore, too numerous modifications are conceivable on the device shown; so can regulate the pressure difference between a point above the fluidized bed 2 and the mixing element 18 into the exhaust air line 31 of the fluidized bed apparatus 1, a valve 33 is integrated be, which about the pressure difference at the measuring points 12f and 12g is regulated.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • External Artificial Organs (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Die Bonding (AREA)

Claims (9)

  1. Procédé destiné à mélanger des matières granuleuses ou pulvérulentes à au moins un liquide, selon lequel en mettant en oeuvre un lit fluidisé de dosage, les matières granuleuses ou pulvérulentes sont soulevées de la zone de fond du lit fluidisé et sont ensuite additionnées de manière dosée, en tant que mélange homogénéisé de gaz et de matière, audit au moins un liquide, et sont mélangées à celui-ci dans un dispositif mélangeur.
  2. Procédé selon la revendication 1, caractérisé en ce que le liquide est pulvérisé dans le mélange homogénéisé de gaz et de matière.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour le dosage du mélange homogénéisé de gaz et de matière, on ajoute à celui-ci en supplément un gaz, avant le mélange audit au moins un liquide, ce gaz étant amené à l'écoulement du mélange de gaz et de matière s'écoulant vers le dispositif mélangeur, de manière à envelopper cet écoulement, et, le cas échéant, parallèlement à la direction d'écoulement, et en ce que la vitesse du gaz amené en supplément, qui enveloppe l'écoulement du mélange de gaz et de matière, est de préférence prévue pour être de même grandeur que la vitesse de l'écoulement du mélange de gaz et de matière.
  4. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, comprenant au moins un appareillage à lit fluidisé (1) possédant une entrée et au moins une sortie et pourvu d'un fond de fluidisation, par exemple un fond perforé, pour produire un mélange à deux phases d'une matière solide granuleuse ou pulvérulente avec un gaz amené par l'intermédiaire du fond de fluidisation, caractérisé en ce que ladite au moins une sortie (3) de l'appareillage à lit fluidisé (1) est raccordée au fond de fluidisation (11) et débouche dans la zone de celui-ci et en ce qu'à la sortie (3) est prévue une conduite d'évacuation (4) qui débouche dans un dispositif mélangeur (18) auquel peut également être amené ledit au moins un liquide, de préférence par l'intermédiaire de buses de pulvérisation ou analogues.
  5. Dispositif selon la revendication 4, caractérisé en ce qu'il est prévu, notamment dans l'appareillage à lit fluidisé (1), un dispositif de mesure destiné à mesurer le contenu en matière solide du mélange de gaz et de matière.
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce qu'à la sortie (3) de l'appareillage à lit fluidisé (1), voire dans la zone de la conduite d'évacuation (4), est prévu un système à buses (28) se présentant sous la forme de corps creux (5), faisant office de dispositif de dosage, notamment pour l'opération de mélange, et comportant des canaux (10) pour l'introduction de gaz supplémentaire dans ou contre le mélange homogène de gaz et de matière, par l'intermédiaire d'une paroi poreuse (7), de buses ou d'éléments similaires du corps creux (5).
  7. Dispositif selon l'une des revendications 4 à 6, caractérisé en ce que pour mesurer le contenu en matière du mélange de gaz et de matière fluidisée, l'appareillage à lit fluidisé (1) et le système à buses (28) sont équipés de zones de mesure (12a à 12f'), le cas échéant disposées de manière éloignée les unes des autres, et comportant des systèmes de mesure de pression ou des sondes de niveau de préférence électriques ou électroniques, dont les signaux de sortie sont transmis à une commande électronique (34), par exemple à mémoire programmable, dont les signaux de sortie sont à leur tour transmis, pour leur commande, à des soupapes (13, 13'), notamment des distributeurs et/ou des soupapes de limitation de pression, et de préférence à un dispositif de transport (21) pour l'amenée d'au moins une matière dans l'appareillage à lit fluidisé (1) et/ou dans un dispositif mélangeur.
  8. Dispositif selon l'une des revendications 4 à 7, caractérisé en ce que l'appareillage à lit fluidisé (1) peut être alimenté, par l'intermédiaire d'une soupape (35) susceptible d'être commandée par la commande (34), en pression de gaz pouvant notamment être présélectionnée.
  9. Dispositif selon l'une des revendications 4 à 8, caractérisé en ce qu'il est prévu un circuit de régulation du liquide (34, 40, 41), et en ce que celui-ci peut de préférence être régulé par le circuit de commande et de régulation (34) relié à l'appareillage à lit fluidisé (1) par les dispositifs de mesure de pression ou manomètres respectifs (12 - 12f).
EP94903715A 1993-01-25 1994-01-11 Procede de dosage et dispositif approprie a cet effet Expired - Lifetime EP0632745B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00201/93A CH688848A5 (de) 1993-01-25 1993-01-25 Verfahren zum Dosieren und Vorrichtung hierfuer.
CH201/93 1993-01-25
PCT/CH1994/000005 WO1994016805A1 (fr) 1993-01-25 1994-01-11 Procede de dosage et dispositif approprie a cet effet

Publications (2)

Publication Number Publication Date
EP0632745A1 EP0632745A1 (fr) 1995-01-11
EP0632745B1 true EP0632745B1 (fr) 1998-03-11

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EP94903715A Expired - Lifetime EP0632745B1 (fr) 1993-01-25 1994-01-11 Procede de dosage et dispositif approprie a cet effet

Country Status (11)

Country Link
EP (1) EP0632745B1 (fr)
CN (1) CN1043852C (fr)
AT (1) ATE163870T1 (fr)
CH (1) CH688848A5 (fr)
CZ (1) CZ285578B6 (fr)
DE (1) DE59405412D1 (fr)
PL (1) PL172396B1 (fr)
RO (1) RO113312B1 (fr)
RU (1) RU94042225A (fr)
SK (1) SK280054B6 (fr)
WO (1) WO1994016805A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8200367B2 (en) * 2008-09-16 2012-06-12 K-Tron Technologies, Inc. Bulk material transport system
US9022642B2 (en) 2011-04-28 2015-05-05 Hubert Ray Broome Dissolution generator, method of dissolving powder, and mixing system
ITTO20110125U1 (it) * 2011-11-21 2013-05-22 Stardale Ltd Apparecchiatura per il dosaggio di liquidi
US11058999B1 (en) 2017-07-10 2021-07-13 Hubert R. Broome Rapid dissolution generator system and method for producing same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057425B (de) * 1953-09-17 1959-05-14 Moeller Johannes Verfahren und Vorrichtung zum pneumatischen Mischen von in Silos gelagertem pulverfoermigem Gut
DE1257682B (de) * 1964-03-18 1967-12-28 Georg Schroeder Zusammenlegbarer Silo
US3563610A (en) * 1969-01-15 1971-02-16 Halliburton Co Apparatus for mixing and unloading pulverulent material
US3582046A (en) * 1969-05-15 1971-06-01 Whirl Air Flow Corp Blending and transporting apparatus for discrete materials
FR2125234A1 (en) * 1971-02-17 1972-09-29 Matrep Sa Fluidising mixer - employs alternating air pressures for powders and up to 50% liquid content
JPS5015737B2 (fr) * 1971-09-27 1975-06-07

Also Published As

Publication number Publication date
PL172396B1 (pl) 1997-09-30
PL305048A1 (en) 1995-01-09
EP0632745A1 (fr) 1995-01-11
CN1101207A (zh) 1995-04-05
RU94042225A (ru) 1996-07-27
SK113994A3 (en) 1995-03-08
WO1994016805A1 (fr) 1994-08-04
RO113312B1 (ro) 1998-06-30
CZ285578B6 (cs) 1999-09-15
CH688848A5 (de) 1998-04-30
SK280054B6 (sk) 1999-07-12
CN1043852C (zh) 1999-06-30
CZ176594A3 (en) 1996-02-14
DE59405412D1 (de) 1998-04-16
ATE163870T1 (de) 1998-03-15

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