FR2614554A1 - Process and device for static mixing combining an imparting of helical motion to the constituents with a diversion of the liquid streams and a reduction in the flow section - Google Patents
Process and device for static mixing combining an imparting of helical motion to the constituents with a diversion of the liquid streams and a reduction in the flow section Download PDFInfo
- Publication number
- FR2614554A1 FR2614554A1 FR8705984A FR8705984A FR2614554A1 FR 2614554 A1 FR2614554 A1 FR 2614554A1 FR 8705984 A FR8705984 A FR 8705984A FR 8705984 A FR8705984 A FR 8705984A FR 2614554 A1 FR2614554 A1 FR 2614554A1
- Authority
- FR
- France
- Prior art keywords
- propeller
- constituents
- mixture
- static mixer
- tubular
- 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.)
- Granted
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 16
- 239000000470 constituent Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 8
- 230000009467 reduction Effects 0.000 title claims description 7
- 239000007788 liquid Substances 0.000 title abstract description 4
- 230000008569 process Effects 0.000 title description 2
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 10
- 210000003462 vein Anatomy 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000012263 liquid product Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 238000005194 fractionation Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
- B01F25/103—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components with additional mixing means other than vortex mixers, e.g. the vortex chamber being positioned in another mixing chamber
-
- 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
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
-
- 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
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/434—Mixing tubes comprising cylindrical or conical inserts provided with grooves or protrusions
-
- 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
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/435—Mixing tubes composed of concentric tubular members
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
PROCEDE ET DISPOSITIF DE MELANGE STATIQUE COMBINANT UNE MISE
EN MOUVEMENT HELICOSDAL DES CONSTITUANTS A UNE DEVIATION DES
VEINES LIQUIDES ET UNE REDUCTION DE LA SECTION DE PASSAGE.METHOD AND DEVICE FOR STATIC MIXING COMBINING A BET
IN HELICOSDAL MOVEMENT OF THE CONSTITUENTS TO A DEVIATION OF
LIQUID VEINS AND A REDUCTION OF THE PASSAGE SECTION.
L'invention se rapporte aux mélangeurs statiques et, en particulier, à ceux qui sont destinés, dans les industries alimentaires, au mélange de produits plus ou moins fluides ou visqueux et susceptibles de contenir des éléments solides, tels que morceaux de fruits, pulpes, fibres et autres.The invention relates to static mixers and, in particular, to those which are intended, in the food industries, for the mixture of more or less fluid or viscous products and likely to contain solid elements, such as pieces of fruit, pulps, fibers and others.
On connaît différents modes de fonctionnement des mélangeurs ou disperseurs statiques.Different modes of operation of static mixers or dispersers are known.
Ces appareils sont bases sur les effets perturbateurs de la présence d'un obstacle sur le passage des constituants à mélanger. Ces effets peuvent consister, soit en fractionnements successifs de la veine en filets séparés, soit en une déviation des filets dans une direction non axiale, soit dans l'introduction d'une rotation des fluides, soit dans la création de turbulences par effet de sillage ou par écart de vitesse entre filets connexes.These devices are based on the disruptive effects of the presence of an obstacle on the passage of the constituents to be mixed. These effects may consist either of successive fractionations of the vein into separate threads, or of a deviation of the threads in a non-axial direction, or in the introduction of a rotation of the fluids, or in the creation of turbulence by the wake effect. or by speed difference between related threads.
Les appareils industriels les plus connus sont constitués de modules placés en série. Dans le Static Mixer Kenics, chaque module, composé de cloisons diamétrales et hélicoldales de pas alternativement droite et gauche, effectue une rotation de 1800 et est calé à 900 du précédent. The most well-known industrial devices are made up of modules placed in series. In the Kenics Static Mixer, each module, composed of diametrical and helicoidal partitions of alternating right and left steps, performs a rotation of 1800 and is set to 900 from the previous one.
Lors de passages successifs, le liquide se divise au bord d'attaque de chaque mobule, d'où un fractionnement d'ordre 2n, n étant le nombre des modules. I1 y a en outre une mise en rotation de chaque veine dans le sens opposé au pas, d'où un brassage à chaque jonction entre deux modules.During successive passages, the liquid divides at the leading edge of each cell, resulting in a fractionation of order 2n, n being the number of modules. I1 is also a rotation of each vein in the opposite direction to the pitch, where a mixing at each junction between two modules.
L'appareil ROSS LPD comporte un module composé de deux ailettes inclinées sur l'axe d'une tige centrale.The ROSS LPD device comprises a module composed of two fins inclined on the axis of a central rod.
Ces appareils exigent une constance parfaite du rapport des débits d'injection des constituants, sont de construction relativement complexe et mal adaptés au mélange de produits comportant des éléments solides.These devices require perfect consistency of the ratio of the injection rates of the constituents, are of relatively complex construction and ill-suited to the mixture of products comprising solid elements.
L'invention a pour objet un procédé de mélange statique exempt de ces inconvénients, combinant l'injection tangentielle des constituants à une extrémité de l'hélice d'une vis tubulaire, pour leur communiquer une rotation autour de l'axe de l'hélice et un déplacement hélicoïdal à la surface de celle-ci, à une réduction de la section de passage du pré-mélange ainsi obtenu et à des changements de direction des veines fluides en vue d'obtenir le mélange final.The subject of the invention is a static mixing process free from these drawbacks, combining the tangential injection of the constituents at one end of the helix of a tubular screw, to impart to them a rotation about the axis of the helix. and a helical displacement on the surface thereof, to a reduction in the cross-section of the pre-mixture thus obtained and to changes of direction of the fluid veins in order to obtain the final mixture.
Suivant un mode d'exécution préféré, l'évacuation du mélange s'effectue, en sens inverse dudit déplacement, par le canal central de la vis tubulaire et ladite réduction de section et lesdits changements de direction sont obtenus dans l'espace de transition entre le trajet aller et le trajet retour du fluide, cet espace de transition étant délimité d'un côté par des portions de surface concaves.According to a preferred embodiment, the evacuation of the mixture is carried out, in the opposite direction to said movement, by the central channel of the tubular screw and said reduction in section and said changes of direction are obtained in the transition space between the outward path and the return path of the fluid, this transition space being delimited on one side by concave surface portions.
L'invention a encore pour objet un mélangeur statique caractérisé en ce qu'il comporte un corps cylindrique muni à une première extrémité d'entrées d'injection tangentielle des constituants à mélanger, une hélice tubulaire disposée à l'intérieur dudit corps sans contact avec sa paroi et coaxiale à celui-ci et formant du côté de ladite première extrémité une sortie axiale du mélange et d'un fond qui ferme ledit corps à sa deuxième extrémité et forme, en regard de l'extrémité correspondante de l'hélice, des surfaces concaves de renvoi des veines fluides vers le canal intérieur de l'hélice.The invention also relates to a static mixer characterized in that it comprises a cylindrical body provided at a first end with tangential injection inlets for the constituents to be mixed, a tubular propeller arranged inside said body without contact with its wall and coaxial with it and forming on the side of said first end an axial outlet of the mixture and a bottom which closes said body at its second end and forms, opposite the corresponding end of the propeller, concave surfaces of return of the fluid veins towards the interior channel of the propeller.
D'autres particularités, ainsi que les avantages de l'inven tion, apparaîtront clairement à la lumière de la description ci-après.Other particularities, as well as the advantages of the invention, will emerge clearly in the light of the description below.
Au dessin annexé :
Les figures 1 et 2 représentent un mélangeur statique
conforme à un mode d'exécution préféré de l'invention,
respectivement en coupe suivant I-I de la figure 2 et
II-II de la figure 1.In the attached drawing:
Figures 1 and 2 show a static mixer
in accordance with a preferred embodiment of the invention,
respectively in section along II of FIG. 2 and
II-II of Figure 1.
Ce mélangeur comprend un corps cylindrique 1 muni à une première extrémité d'une entrée 2 du constituant principal du mélange et d'une entrée 3 d'un additif. Ce corps est fermé à son extrémité opposée par un fond 4 dont la surface intérieure forme une cavité semi-torique, dont la section dans un plan de symétrie représentée à la figure 1 est imposée de demi-cercles raccordés en 42. A sa première extrémité, à pas constant, le corps I est muni d'une sortie 5 du mélange, laquelle prolonge le canal interne d'une vis tubulaire à pas constant 6, disposée suivant l'axe XX' du corps, à l'intérieur de celui-ci, et dont une extrémité débouche en face de la pointe 42 formée par la cavité semitorique, tandis que l'autre extrémité est solidaire de la bride 51 qui forme le raccordement de sortie 52 du mélange.This mixer comprises a cylindrical body 1 provided at one end with an inlet 2 of the main constituent of the mixture and an inlet 3 of an additive. This body is closed at its opposite end by a bottom 4, the inner surface of which forms a semi-toric cavity, the section of which in a plane of symmetry shown in FIG. 1 is imposed by semicircles connected at 42. At its first end , with constant pitch, the body I is provided with an outlet 5 of the mixture, which extends the internal channel of a tubular screw with constant pitch 6, disposed along the axis XX 'of the body, inside of it ci, and one end of which opens opposite the tip 42 formed by the semitocavity, while the other end is integral with the flange 51 which forms the outlet connection 52 of the mixture.
Les entrées 2 et 3 sont radiales et entourées de raccords 21 et 31.Inputs 2 and 3 are radial and surrounded by connections 21 and 31.
Les filets 61 de l'hélice de la vis ont un front avant 610 faiblement incliné par rapport à une direction perpendiculaire à l'axe XX', et un front arrière 611 fortement incli né, (il forme un angle de 600 par exemple avec ladite perpendiculaire).The threads 61 of the screw propeller have a front edge 610 slightly inclined with respect to a direction perpendicular to the axis XX ', and a rear edge 611 strongly inclined born, (it forms an angle of 600 for example with said perpendicular).
La bride 51 et le fond 4 sont amovibles, leur raccordement au corps 1 se faisant de préférence au moyen de colliers 7-8 formant clips. On notera que ce mode de fixation permet le démontage facile d'un mélangeur qui ne comporte que trois pièces, en vue d'enlever les morceaux qui pourraient obstruer le passage du mélange. Le passage des morceaux dans l'hélice est en outre facilité par l'arrondi 612 du filet.The flange 51 and the bottom 4 are removable, their connection to the body 1 preferably by means of collars 7-8 forming clips. Note that this method of attachment allows easy disassembly of a mixer that has only three parts, in order to remove the pieces that could obstruct the passage of the mixture. The passage of the pieces in the propeller is further facilitated by the rounding 612 of the thread.
En fonctionnement, les deux constituants à mélanger sont injectés simultanément par des pompes raccordées aux entrées 2 et 3, tangentiellement par rapport à la vis, comme le montrent les trajets en tirets et en pointillés illustrés à la figure 2. Ils sont ainsi mis en rotation à vitesse relativement faible autour de l'axe de la vis et cette rotation continue au cours de leur mouvement hélicoldal qui les dirige vers la cavité semi-torique 41.In operation, the two components to be mixed are injected simultaneously by pumps connected to inputs 2 and 3, tangentially with respect to the screw, as shown by the dashed and dotted paths illustrated in FIG. 2. They are thus set in rotation at a relatively low speed around the axis of the screw and this rotation continues during their helicoldal movement which directs them towards the semi-toric cavity 41.
L'injection des deux constituants se fait de préférence avec des débits qui restent dans un rapport constant entre eux du débit minimum au débit maximum.The injection of the two constituents is preferably carried out with flow rates which remain in a constant ratio between them from the minimum flow rate to the maximum flow rate.
I1 se forme, lors de l'injection, des couches superposées de produits et le mouvement hélicoldal des flux fait glisser ces couches les unes par rapport aux autres, ce qui donne un pré-mélange. Ce glissement relatif des couches rend moins essentielle que dans certains mélangeurs statiques connus la constance du rapport des débits d'injection. I1 is formed, during the injection, of superimposed layers of products and the helical-flow movement of the flows makes these layers slide relative to each other, which gives a premix. This relative sliding of the layers makes the consistency of the ratio of injection rates less essential than in certain known static mixers.
Le mélange définitif s'obtient dans la cavité 41, qui joue, en coopération avec l'extrémité du canal de la vis, le rôle de concentrateur. Cet effet est obtenu grâce à la réduction progressive de section de passage liée à la forme du concentrateur (le rapport entre la section de passage dans la cavité torique et la section de passage à l'entrée du canal est par exemple compris entre 1,7 et 1,8), mais aussi, grâce au fait que les veines fluides sont déviées et subissent à la fois une inversion de leur flux et une différenciation des longueurs de leurs trajets respectifs : les couches les plus proches de l'axe XX' effectuent un trajet plus court que les couches les plus proches des parois du corps I, d'où un glissement relatif des couches.The final mixture is obtained in the cavity 41, which plays, in cooperation with the end of the channel of the screw, the role of concentrator. This effect is obtained thanks to the gradual reduction of the passage section linked to the shape of the concentrator (the ratio between the passage section in the toric cavity and the passage section at the entrance to the channel is for example between 1.7 and 1,8), but also, thanks to the fact that the fluid veins are deflected and undergo both an inversion of their flow and a differentiation of the lengths of their respective paths: the layers closest to the axis XX 'perform a shorter path than the layers closest to the walls of the body I, resulting in a relative sliding of the layers.
Le retour et l'évacuation centrale du mélange en sens inverse de sa progression autour de l'hélice au cours du prémélange, permettent de réduire la longueur de l'appareil. Le trajet est aussi dépourvu que possible de surfaces susceptibles d'accrocher et de retenir des éléments solides. Il n'y a pas création de turbulences et les pertes de charge sont très faibles ; la forme arrondie de la cavité 41 contrue, de même que l'arrondi des filets de l'hélice, à éviter les turbulences qui pourraient être nuisibles à des produits fragiles.The return and central evacuation of the mixture in the opposite direction of its progression around the propeller during the premixing, makes it possible to reduce the length of the device. The path is as free as possible of surfaces likely to catch and retain solid elements. There is no creation of turbulence and the pressure drops are very low; the rounded shape of the cavity 41 contrue, as well as the rounding of the threads of the propeller, to avoid turbulence which could be harmful to fragile products.
On notera que l'un des constituants est injecté sur une portion du corps de l'hélice dépourvue de filets, donc facile à nettoyer. Les autres constituants seront, de préférence, injectés sur les parties inclinées des filets succes sifs, pour éviter toute retenue d'éléments solides.It will be noted that one of the constituents is injected into a portion of the body of the propeller devoid of threads, therefore easy to clean. The other constituents will preferably be injected onto the inclined parts of the successive threads, to avoid any retention of solid elements.
On injectera de préférence les différents constituants à des vitesses sensiblement égales, c'est-à-dire avec des sections des entrées respectives, inversement proportionnelles aux débits désirés, pour éviter que. les produits de plus faible débit ne sortent du mélangeur en proportions plus faibles que celles présentes pendant un temps de stabilisation du fonctionnement relativement long.The different constituents will preferably be injected at substantially equal speeds, that is to say with respective inlet sections, inversely proportional to the desired flow rates, to avoid that. the lower flow rate products leave the mixer in lower proportions than those present during a relatively long operating stabilization time.
I1 doit être bien compris que le mélangeur décrit pourra être agencé pour mélanger plus de deux constituants. Ceux-ci peuvent être fluides ou visqueux, avec ou sans morceaux. Les mélanges peuvent être effectués, soit en continu, soit dose par dose. It should be clearly understood that the mixer described can be arranged to mix more than two components. These can be fluid or viscous, with or without lumps. Mixtures can be carried out either continuously or dose by dose.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8705984A FR2614554B1 (en) | 1987-04-28 | 1987-04-28 | METHOD AND DEVICE FOR STATIC MIXING COMBINING A HELICOIDAL MOVEMENT OF THE CONSTITUENTS TO A DEVIATION OF LIQUID VEINS AND A REDUCTION OF THE PASSAGE SECTION |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8705984A FR2614554B1 (en) | 1987-04-28 | 1987-04-28 | METHOD AND DEVICE FOR STATIC MIXING COMBINING A HELICOIDAL MOVEMENT OF THE CONSTITUENTS TO A DEVIATION OF LIQUID VEINS AND A REDUCTION OF THE PASSAGE SECTION |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2614554A1 true FR2614554A1 (en) | 1988-11-04 |
| FR2614554B1 FR2614554B1 (en) | 1990-10-12 |
Family
ID=9350552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8705984A Expired - Fee Related FR2614554B1 (en) | 1987-04-28 | 1987-04-28 | METHOD AND DEVICE FOR STATIC MIXING COMBINING A HELICOIDAL MOVEMENT OF THE CONSTITUENTS TO A DEVIATION OF LIQUID VEINS AND A REDUCTION OF THE PASSAGE SECTION |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2614554B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2840241A1 (en) * | 2013-08-09 | 2015-02-25 | Proventia Emission Control Oy | Method and arrangement for leading exhaust gas in an exhaust gas passage |
| RU2622414C1 (en) * | 2016-09-06 | 2017-06-15 | Владимир Иванович Савичев | Liquid and gas mixing device |
| US11221028B1 (en) * | 2018-11-29 | 2022-01-11 | Vortex Pipe Systems LLC | Cyclonic flow-inducing pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB729226A (en) * | 1952-07-21 | 1955-05-04 | Serck Radiators Ltd | Liquid mixing apparatus |
| GB1140837A (en) * | 1966-02-22 | 1969-01-22 | Ashbrook Corp | Method and apparatus for mixing streams of gas |
| FR2241333A1 (en) * | 1973-08-23 | 1975-03-21 | Dannequin Robert | Liq. turbulence mixer having off-centre side entries - with cylindrical inserts with a preset bore to ensure correct liq. proportions |
| US4111402A (en) * | 1976-10-05 | 1978-09-05 | Chemineer, Inc. | Motionless mixer |
| DE3229486A1 (en) * | 1982-08-07 | 1984-02-09 | Franz 2000 Hamburg Cukrowicz | Static grooved-tube mixer |
-
1987
- 1987-04-28 FR FR8705984A patent/FR2614554B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB729226A (en) * | 1952-07-21 | 1955-05-04 | Serck Radiators Ltd | Liquid mixing apparatus |
| GB1140837A (en) * | 1966-02-22 | 1969-01-22 | Ashbrook Corp | Method and apparatus for mixing streams of gas |
| FR2241333A1 (en) * | 1973-08-23 | 1975-03-21 | Dannequin Robert | Liq. turbulence mixer having off-centre side entries - with cylindrical inserts with a preset bore to ensure correct liq. proportions |
| US4111402A (en) * | 1976-10-05 | 1978-09-05 | Chemineer, Inc. | Motionless mixer |
| DE3229486A1 (en) * | 1982-08-07 | 1984-02-09 | Franz 2000 Hamburg Cukrowicz | Static grooved-tube mixer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2840241A1 (en) * | 2013-08-09 | 2015-02-25 | Proventia Emission Control Oy | Method and arrangement for leading exhaust gas in an exhaust gas passage |
| RU2622414C1 (en) * | 2016-09-06 | 2017-06-15 | Владимир Иванович Савичев | Liquid and gas mixing device |
| US11221028B1 (en) * | 2018-11-29 | 2022-01-11 | Vortex Pipe Systems LLC | Cyclonic flow-inducing pump |
| US20220090613A1 (en) * | 2018-11-29 | 2022-03-24 | Vortex Pipe Systems LLC | Cyclonic flow-inducing pump |
| US12012980B2 (en) * | 2018-11-29 | 2024-06-18 | Vortex Pipe Systems LLC | Cyclonic flow-inducing pump |
| US20240288013A1 (en) * | 2018-11-29 | 2024-08-29 | Vortex Pipe Systems LLC | Cyclonic flow-inducing pump |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2614554B1 (en) | 1990-10-12 |
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