EP0486933B1 - Dispositif pour la dissolution de matières solides en vrac dans un liquide - Google Patents

Dispositif pour la dissolution de matières solides en vrac dans un liquide Download PDF

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Publication number
EP0486933B1
EP0486933B1 EP91119336A EP91119336A EP0486933B1 EP 0486933 B1 EP0486933 B1 EP 0486933B1 EP 91119336 A EP91119336 A EP 91119336A EP 91119336 A EP91119336 A EP 91119336A EP 0486933 B1 EP0486933 B1 EP 0486933B1
Authority
EP
European Patent Office
Prior art keywords
liquid
line
container
sugar
circulation line
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
EP91119336A
Other languages
German (de)
English (en)
Other versions
EP0486933A2 (fr
EP0486933A3 (fr
Inventor
Angelo Cadeo
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.)
Tetra Pak Processing Equipment AG
Original Assignee
Miteco 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 Miteco AG filed Critical Miteco AG
Publication of EP0486933A2 publication Critical patent/EP0486933A2/fr
Publication of EP0486933A3 publication Critical patent/EP0486933A3/fr
Application granted granted Critical
Publication of EP0486933B1 publication Critical patent/EP0486933B1/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
    • B01F21/00—Dissolving
    • B01F21/20—Dissolving using flow mixing
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/25—Mixing by jets impinging against collision plates
    • 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
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • 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
    • B01F33/404—Mixers using gas or liquid agitation, e.g. with air supply tubes for mixing material moving continuously therethrough, e.g. using impinging jets

Definitions

  • the invention relates to a device for dissolving solid bulk material in a liquid, a liquid in a container circulating, having a first supply line for the solid bulk material, a second supply line for the liquid and a circulating line for the circulating liquid, wherein these lines open into the container, with an outlet nozzle located in the container, to which a baffle plate faces.
  • the device is intended in particular for large-area solvents (large-scale mixers) in which the bulk solids are present, for example, as sugar, which is to be dissolved, for example, in water.
  • large-volume solvent the container is charged in batches, with liquid being placed in the container, depending on the final concentration, whereupon the sugar is blown in with air during a specific loading time.
  • the loading time can extend, for example, over an hour, with large amounts of conveying air of, for example, 480 Nm3 / h to 800 Nm3 / h being introduced into the container. This conveying air must of course be led away from the container.
  • the aim is to create a device in which no air separator and no filter are necessary and the conveying air can nevertheless be released into the atmosphere without dust.
  • the device according to the invention is characterized in that the first feed line and the circulation line are brought together to form an outlet section which carries the outlet nozzle, so that the flows from the first feed line and the circulation line emerge at the outlet nozzle and hit the baffle plate.
  • the large-volume solvent shown in FIG. 1 has a container 1, a first feed line 2 for the bulk solids and a second feed line 3 for a liquid supply.
  • the two supply lines 2 and 3 open into the container 1.
  • the device also has a circulation line 6 for the circulating liquid.
  • This circulation line 6 comprises a suction section 6 'and a pressure section 6''.
  • At the bottom of the container 1 there is still a line 7 for complete Final emptying of the container.
  • the exhaust air line 8 is located at the top of the container. The dust-free conveying air should flow out of this, without the need for a cyclone separator and a filter.
  • the circulation line 6 has an L-shaped elbow 9 in the interior of the container 1 and the first feed line 2 opens into the circulation line 6 in the region of the elbow 9.
  • the first feed line 2 has an enlarged nozzle 10 at its mouth.
  • the line section between the expanded nozzle 10 and the outlet nozzle 4 designed as a compression nozzle is to be referred to as the outlet section 11 of the circulation line 6.
  • the circulation line 6 with its pressure section 6 ′′, the elbow 9 and the outlet section 11 forms, together with the first feed line 2 and its nozzle 10, a jet pump, which in the present case is designed as a liquid jet solid suction device. If sugar is to be dissolved in water, this jet pump is a water jet sugar sucker. A small negative pressure then occurs at the nozzle 10 due to the circulating liquid.
  • the outlet nozzle 4 the currents emerge from the first feed line 2 and the circulation line 6 and hit the baffle plate 5.
  • the circulation line 6 has the outlet section 11 and the first feed line 2 opens into the circulation line 6.
  • the first feed line 2 it would also be possible for the first feed line 2 to have the outlet section and the circulation line into the first feed line 2 flows into.
  • a minimum liquid level 13 is specified in the container 1 and is indicated by the marking 12.
  • the container 1 is loaded with the liquid (water) and the bulk solids in batches (Sugar) loaded.
  • the valve 14 is closed.
  • the system is a so-called large area solver.
  • the structure of the system shown in FIG. 1 could also be part of a continuously operating system, so that the container 1 would then usually be referred to as a suspension container, and in addition to this container 1 there would also be a release chamber (not shown).
  • the device according to the invention is primarily of interest for the large-area solvent mentioned, since in this the sugar is conveyed into the interior of the container 1 with large amounts of air.
  • the baffle plate 5 is held in the outlet section 11 by means of a rod 16, for example via a three-pointed, star-shaped holder 17.
  • a pump 18 and a shut-off valve 19 are located in the circulation line 6.
  • a line 20 leads away from the circulation line 6, via which the finished sugar solution is led away from the container 1.
  • a shut-off valve 21 is located in line 20.
  • baffle plate 5 which is known per se.
  • the jet emerging from the nozzle 4 strikes the baffle plate 5 essentially at right angles, so that the aforementioned jet (axial jet) is then deflected into a star-shaped, diverging, radial jet.
  • this baffle plate is already used to generate the radial jet, with the circulating liquid again and again hits this baffle plate 5.
  • a particularly strong turbulent flow in the circulating medium is achieved through this baffle plate.
  • the circulating medium liquid with solids dissolved and suspended in it) is sucked in by the pump 18 via the suction section 6 'and led back to the baffle plate 5 via the pressure section 6''.
  • the sugar supply line 2 (with the valve 14 open) is now introduced into the circulation line 6.
  • the nozzle 10 of the line 2 together with the outlet section 11, forms a jet pump, a large turbulent flow occurring in the outlet section 11 and the circulating liquid being very strongly mixed with the sugar supplied via the line 2.
  • the solid due to the great turbulence, the solid (sugar and sugar dust) is intensely and thus quickly bound by the liquid.
  • This flow medium (liquid + solids + sugar solution + air) passes through the compression nozzle 4, in which its speed increases on the baffle plate 5.
  • the aforementioned thorough mixing and intensive binding of the solid to the liquid occurs, but in addition a very special advantageous effect now occurs.
  • the aforementioned large amount of air is divided into many small air bubbles by the baffle plate 5. These many small air bubbles slowly come to the liquid surface 13 due to their lower buoyancy. These many small air bubbles can only contain insignificant sugar dust, which can easily be bound to the liquid when rising in the liquid, so that the total amount of air is distributed through the smallest air bubbles sugar-free enters the gas space 22 and therefore a sugar-free conveying air can also be discharged via the line 8.
  • the advantage therefore lies both in the division of the large amount of air into innumerable smallest air bubbles, which can only contain insignificant sugar dust, and in the increased contact time achieved by the smallest air bubbles when the smallest air bubbles rise slowly, so that these two effects ensure sugar-free removal the conveying air from the container 1 is reached.
  • the procedure for working with the device according to the invention is as follows. First, with the valve 15 open, a batch of a certain amount of liquid is fed to the container 1 via the line 3 (for example 1/3 of the height of the container). Then the valve 15 is closed. The valve 21 was already closed before the filling process. Now the pump 18 is switched on, the valve 19 is opened and a predetermined amount of sugar is supplied to the container 1 via the line 2, for example from a truck with the valve 14 open, the aforementioned large amount of air at a speed, for example in the range of 15-20 m / s while, for example, introduces the sugar into the liquid for one hour. The liquid 23 is explained in FIG Circulated (circulated) way over the circulation line 6.
  • a negative pressure is generated at the mouth end of the line 2, so that the circulating liquid is prevented from entering the line 2, so that no liquid is conveyed to the truck from which the sugar is removed.
  • the many small air bubbles are generated in the manner described by the baffle plate 5, so that the entire amount of air comes into contact with the liquid through a substantially increased contact area and during a considerably longer contact time.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Paper (AREA)

Claims (9)

  1. Dispositif pour la dissolution de matières solides en vrac dans un liquide, dans lequel circule un liquide (23) situé dans un récipient (1), ce dispositif comprenant un premier conduit d'alimentation (2) pour la matière solide en vrac, un deuxième conduit d'alimentation (3) pour le liquide et un conduit de circulation (6) pour le liquide en circulation (23), ces conduits (2, 3, 6) débouchant dans le récipient (1), et une tuyère de sortie (4) qui est située dans le récipient (1) et qui est tournée vers une plaque de rebondissement (5), caractérisé en ce que le premier conduit d'alimentation (2) et le conduit de circulation (6) sont réunis en un tronçon de sortie (11) qui porte la tuyère de sortie (4) de façon que les courants provenant du premier conduit d'alimentation (2) et du conduit de circulation (6) sortent à la tuyère de sortie (4) et frappent la plaque de rebondissement (5).
  2. Dispositif suivant la revendication 1, dans lequel le conduit de circulation (6) présente le tronçon de sortie (11), caractérisé en ce que le premier conduit d'alimentation (2) débouche dans le conduit de circulation (6) (figures 1, 2).
  3. Dispositif suivant la revendication 1, caractérisé en ce que le premier conduit d'alimentation (2) présente le tronçon de sortie (11).
  4. Dispositif suivant l'une des revendications 1, 2 et 3, dans lequel le conduit de circulation (6) présente, à l'intérieur du récipient (1), un coude en forme de L (9), caractérisé en ce que le premier conduit d'alimentation (2) débouche dans la zone du coude (9) du conduit de circulation (6).
  5. Dispositif suivant l'une des revendications 1 à 4, caractérisé en ce que la tuyère de sortie (4) est réalisée sous la forme d'une tuyère de compression.
  6. Dispositif suivant l'une des revendications 1 à 5, caractérisé en ce que la réunion du premier conduit d'alimentation (2) au conduit de circulation (6) dans le tronçon de sortie (11) a lieu au moyen d'une pompe à jet de liquide qui aspire simultanément des matières solides et de l'air.
  7. Procédé pour la mise en oeuvre du dispositif suivant la revendication 1, caractérisé en ce que le récipient (1) est garni, par charges, de liquide et de matière solide en vrac.
  8. Procédé pour la mise en oeuvre du dispositif suivant la revendication 1, caractérisé en ce que le récipient (1) est chargé en continu de liquide et de matière solide en vrac.
  9. Procédé suivant la revendication 7, caractérisé en ce que la matière solide en vrac est transportée dans le récipient (1) au moyen d'air à travers le premier conduit d'alimentation (2).
EP91119336A 1990-11-19 1991-11-13 Dispositif pour la dissolution de matières solides en vrac dans un liquide Expired - Lifetime EP0486933B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3666/90 1990-11-19
CH3666/90A CH682460A5 (de) 1990-11-19 1990-11-19 Vorrichtung zum Lösen von Feststoff-Schüttgut in einer Flüssigkeit.

Publications (3)

Publication Number Publication Date
EP0486933A2 EP0486933A2 (fr) 1992-05-27
EP0486933A3 EP0486933A3 (fr) 1992-06-03
EP0486933B1 true EP0486933B1 (fr) 1995-03-15

Family

ID=4260899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119336A Expired - Lifetime EP0486933B1 (fr) 1990-11-19 1991-11-13 Dispositif pour la dissolution de matières solides en vrac dans un liquide

Country Status (4)

Country Link
EP (1) EP0486933B1 (fr)
AT (1) ATE119804T1 (fr)
CH (1) CH682460A5 (fr)
DE (1) DE59104957D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017050639A1 (fr) 2015-09-24 2017-03-30 Tetra Laval Holdings & Finance S.A. Segment de tuyau de chicane, dispositif d'injecteur, et installation de dissolution

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2200032T3 (es) * 1996-04-01 2004-03-01 Societe Des Produits Nestle S.A. Procedimiento y dispositivo de disolucion de un polvo en un liquido.
DE102008012725A1 (de) 2008-03-05 2009-09-24 United Waters International Ag Vorrichtung zur Begasung von Flüssigkeiten

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR555142A (fr) * 1922-08-16 1923-06-25 Appareil pour assurer le contact intime entre un liquide dissolvant et un solide pulvérisé
DE2925191C2 (de) * 1979-06-22 1982-11-11 BURDOSA Ing. Herwig Burgert, 6305 Buseck Schlaufenreaktor
DE3341992A1 (de) * 1983-11-22 1985-05-30 Georg Dipl.-Ing. 5000 Köln Schreiber Mehrstufenkolonne
SU1368012A1 (ru) * 1986-07-02 1988-01-23 Предприятие П/Я А-3852 Устройство дл растворени порошкообразных материалов в жидкости
GB8617660D0 (en) * 1986-07-18 1986-08-28 Healplan Ltd Dry powder doser
GB8915978D0 (en) * 1989-07-12 1989-08-31 Mcdermott Matthew Apparatus for dissolving solids in liquids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017050639A1 (fr) 2015-09-24 2017-03-30 Tetra Laval Holdings & Finance S.A. Segment de tuyau de chicane, dispositif d'injecteur, et installation de dissolution

Also Published As

Publication number Publication date
CH682460A5 (de) 1993-09-30
EP0486933A2 (fr) 1992-05-27
DE59104957D1 (de) 1995-04-20
ATE119804T1 (de) 1995-04-15
EP0486933A3 (fr) 1992-06-03

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