EP1600205A1 - Mélangeur et procédé pour l'addition d'un additif à un mélange pompable - Google Patents

Mélangeur et procédé pour l'addition d'un additif à un mélange pompable Download PDF

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Publication number
EP1600205A1
EP1600205A1 EP04102373A EP04102373A EP1600205A1 EP 1600205 A1 EP1600205 A1 EP 1600205A1 EP 04102373 A EP04102373 A EP 04102373A EP 04102373 A EP04102373 A EP 04102373A EP 1600205 A1 EP1600205 A1 EP 1600205A1
Authority
EP
European Patent Office
Prior art keywords
mixing
additive
mixture
concrete
mixing device
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.)
Withdrawn
Application number
EP04102373A
Other languages
German (de)
English (en)
Inventor
Alexander Bleibler
Cyrill Spirig
Alexander Stücheli
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.)
Sika Technology AG
Original Assignee
Sika Technology 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 Sika Technology AG filed Critical Sika Technology AG
Priority to EP04102373A priority Critical patent/EP1600205A1/fr
Priority to PCT/EP2005/052447 priority patent/WO2005115600A1/fr
Priority to EP05752749A priority patent/EP1758672A1/fr
Publication of EP1600205A1 publication Critical patent/EP1600205A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1246—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
    • 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
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3132—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/50—Pipe mixers, i.e. mixers wherein the materials to be mixed flow continuously through pipes, e.g. column mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/62—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis comprising liquid feeding, e.g. spraying means
    • B01F27/621—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis comprising liquid feeding, e.g. spraying means the liquid being fed through the shaft of the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/721—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle
    • B01F27/722—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle the helices closely surrounded by a casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients

Definitions

  • the invention is based on a mixing device according to the preamble of the first claim.
  • the invention is also based on a method for adding an additive to a pumpable mixture according to the preamble of the independent method claim.
  • the invention is based on the object at a mixing device and a method of the type mentioned a mixing device To specify which makes it possible to quickly add additives in a plastic-viscous To introduce mixture and to achieve a good mixing.
  • the core of the invention is therefore that in a line at least one Injection means for adding additive is arranged in the mixture, that downstream of a mixing space is arranged, in which the additive is dynamically mixed with the plastic-viscous mixture.
  • the advantages of the invention are, inter alia, that a good Mixing of plastic-viscous mixture and additive is achieved. This at a relatively short mixing distance and that the mixing shortly before the processing site can be made.
  • the one shown here Method and apparatus are particularly suitable for continuous Adding and mixing very small amounts of chemical additives in one Pumpable mixture with plastic-viscous behavior, especially in a Granules suspension mixture such as concrete.
  • FIG. 1 schematically shows the processing of a plastic-viscous mixture, FIG. shown here by concrete 10 in a building.
  • a Transport vehicle 1 concrete is delivered to the construction site. Not shown that the concrete is usually mounted in a mounted on the transport vehicle, is transported rotating drum. This concrete was in the concrete plant so treated with additives that the hydration or Tying mechanism is delayed by several hours. This concrete corresponds generally to a pumpable granule suspension mixture with plastic-viscous behavior.
  • the concrete 10 is placed in a container 2 stored or directly from the vehicle by means of a pump 3 and a line 4 pumped under pressure to the site. Such a line can while transporting the concrete over several 100 meters or even some Kilometers are used.
  • additives 5 also additive called
  • activators e.g. a setting accelerator
  • reactivated Prior to the processing of the concrete 10 must this for processing by adding additives 5 (also additive called), such as activators, e.g. a setting accelerator, reactivated become.
  • the addition of the additive takes place in a mixing device 6.
  • About another line 7 may be supplied with further substances, e.g. Water, Concrete from another source, etc ..
  • the mixed with the admixture 5 Concrete 10 ' is then at the construction site at the processing 20 accordingly processed.
  • the processing of the concrete can be done by any method take place, e.g. by spraying, casting, etc ..
  • the distance from The mixing device to the processing is arbitrary, but will advantageously chosen as short as possible, so that as little waste accumulates, or activated concrete remains in the line and this possibly makes us unusable.
  • This mixing device 6 comprises a feed line 8 and a mixing chamber 9.
  • the diameter of the mixing chamber 9 is advantageously greater than that of the feed line 8 in order to reduce the flow rate through the mixing chamber.
  • the mixing space is preferably cylindrically shaped because of the high pressures and may have a small volume of less than 100 liters.
  • the present mixing method is preferably carried out as an inline mixing method which is under pressure.
  • the supply line 8 which is preferably angled, means 11 for coarse distribution of the additive 5 in the concrete 10 are arranged.
  • an unillustrated mixing element is arranged, which can be driven by a drive 13 via a shaft 12.
  • additive 5 can be introduced into the concrete. Furthermore, additive 5 can be injected in the initial region of the mixing chamber 9, wherein the injection means to be used can be formed analogously to the injection means 14, 14a.
  • the additive can thus be introduced at the same time at several points over the line cross-section and distributed by the downstream mixing chamber both axially and radially homogeneous, respectively, are mixed. This results in a homogeneous distribution of the additive in the concrete 10 'at the end of the mixing space, so that a uniform activation of the concrete takes place.
  • the bending of the feed line has several advantages. Thus, the angling allows the drive and the shaft for the mixing chamber to be arranged on one axis without obstructing the mixture flow.
  • injection means 14a can be arranged in the angling over which additive can be introduced into the edge region of the pumped concrete in spite of the smear layer in the edge region.
  • the addition of the additive 5 is advantageously carried out at the same or a greater flow rate than that of the concrete.
  • the relative velocity of the additive is then greater than zero compared to the concrete.
  • Fig. 3a the means 11 for coarse distribution of the additive are more accurate shown.
  • injection means 14th the additive 5 is introduced by means of several nozzles 15 in the concrete.
  • the injection means 14 are shown in FIG. 3 as a tube with holes as However, nozzles 15 shown, but can also be formed differently.
  • the nozzles 15 in the injection means 14 are preferably so arranged that the injection of the additive in the flow direction of the Concrete 10 is done. As a result, the nozzles 15 are not penetrated by the concrete clogged and the added additive forms a thread-like in concrete Structure and does not dwell in the smear layer, as with the addition over Wall openings in the supply line 8 would happen.
  • Fig. 4a further means 11 for coarse distribution of the additive are shown.
  • the supply line 8 has an extension, in which an injection means 14 'is arranged.
  • the injection means 14 ' serves as a flow divider, which divides the concrete stream 10 into two parts.
  • the additive 5 is introduced at the downstream end of the injection means 14 'by means of a plurality of nozzles 15 in the concrete, see Fig. 4b, 4c.
  • the injection means 14 ' has a substantially elliptical cross section with sharp arrival and trailing edges.
  • This injection means 14 ' is built relatively solid, for example, to be able to withstand stones in the concrete and thus to prevent damage to the Eindüsungsmittels.
  • the cross-section of the supply line 8 is extended according to the dimensions of the injection means, so that the concrete flow flows evenly and the flow of the concrete is influenced as little as possible. If desired, however, the cross-section can also be adapted so that the flow is accelerated or slowed down in the region of the injection of the admixture. In addition, in the region of the nozzles 15, injection means 14a can also be arranged in the edge region of the supply line in order to inject additives in the edge region.
  • the injection means 14 'different in Feeding means 8 are aligned. Especially if several Injector means 14 'are arranged in series in the feed means 8 advantageous to align them differently in the feeding means, as this is shown schematically in Figs. 4b and 4c.
  • the additive distribution in the concrete is downstream of two Injection means 14 'shown in FIG. 4b and 4c. It turns out a good distribution of the additive in the concrete, which by additional Injection agent can be improved.
  • the task of additive via the injection means 14, 14 ', 14a takes place advantageously such that the additive volume flow is proportional everywhere is adapted to the flow rate of the granular suspension mixture and Thus, over the entire cross section, the same amount of additive is distributed. This means that on the edge quantitatively less additives is admitted as in the middle region of the line. This because the granule suspension mixture on the edge of a much smaller flow velocity as in the middle. The addition of the same amount of additive just on the edge would lead to an accumulation of the additive on the edge lead to the middle region of the line.
  • the mixing chamber 9 is shown in detail.
  • the shaft 12 is set in rotation via the drive, not shown here, so that the already added thread-shaped additive is cross-mixed in the concrete.
  • the shape of the mixing elements is arbitrary per se, with some possible embodiments being described in the following FIG. 7.
  • Additive 5 can also be supplied directly through the mixing elements 16 in the concrete, the nozzles are formed analogous to the Eindüsungsstoffn. The supply of the additive takes place via the shaft 12.
  • static mixing elements 17 may additionally be arranged, which support the mixing process of the mixing elements 16.
  • the number, shape and position of the static mixing elements 17 mounted on the wall or inside are such that they do not cause clogging. In addition, the static mixing elements 17 prevent marginalities.
  • the shaft 12, which is mounted on a bearing 12a need not necessarily lie on the central axis of the line 8, but can also be arranged in a particular case for better mixing next to the central axis, as symbolized in the figure by the double arrow.
  • a mixing element 16 is shown in detail.
  • the shaft 12 and the mixing element 16 have holes through which the additive 5 is passed to nozzles 15 through which exits the additive.
  • the nozzles 15 are preferably arranged in the mixing element 16 so that the injection of the additive takes place in the flow direction of the concrete 10. As a result, the nozzles 15 are not blocked by the concrete.
  • the nozzles can be arranged over the entire radial extent of the mixing element 16 or only over certain partial areas. The nozzles do not have to be arranged symmetrically, so that the mixing can be improved depending on the design by a certain asymmetry.
  • Fig. 7 are several different possible embodiments of Mixing elements 16 shown. These are a) propeller stirrers, b) Disc stirrer, c) toothed disk stirrer, d) inclined blade stirrer, e) Impeller stirrer, f) anchor stirrer, g) lattice stirrer or blade stirrer, h) Crossbar stirrer, i) MIG stirrer and k) helical stirrer. Basically you can these types of mixing elements alone, in combination or modification be used. Preferably, however, the mixing element should be so be designed that it produces as little resistance in the concrete.
  • FIG. 8 shows a further embodiment of the mixing chamber 9.
  • the Mixing chamber in the Mixing chamber are on the shaft 12 a plurality of stages of mixing elements 16 as Arranged helical stirrer. About the shaft 12 and the mixing elements 16 is added to the concrete admixture 5 during cross-mixing. These Design of the mixing element produces little resistance in the concrete and allows a uniform admixture of the additive. Of course you can when using a helical stirrer also two or more Nested spiral agitators are used to allow the Mixing is improved and the addition of additives over the entire cross section is made possible.
  • FIG. 9 shows a further embodiment of a mixing chamber 9.
  • the Mixing chamber in the Mixing chamber are two shafts 12 with multiple stages of mixing elements 16th arranged in the flow direction.
  • the two shafts 12 rotate thereby preferably against each other and the mixing elements can interlock, but without touching.
  • Fig. 10 is the Interlocking of the mixing elements shown in detail.
  • On the right Page is schematically the effect of this mixture, that is the stretching and wrinkles, or the fine distribution of the additive shown in the concrete. Of course, any number of other waves can be used become.
  • FIGS. 11 a and 11 b show a further embodiment of the mixing chamber 9 shown.
  • the shaft 12 'for driving the mixing elements 16' is not here Mixing room arranged, but outside.
  • the drive is advantageously over the shaft 12 'arranged gears 18, which in the ring gear 19 of the Engage mixing elements 16 '.
  • the actual mixing elements protrude into the concrete conveyed through the mixing room and mix the concrete and the additive, especially in the periphery. How far the Mixing elements hineineragen, must be adapted to the particular circumstances be such. the plastic-viscous mixture, the geometry of the Mixing room, etc ..
  • About the mixing elements 16 ' can also here the concrete Add additive 5 during cross-mixing.
  • the invention is not limited to the one shown and described Embodiment limited.
  • the activator can be any Additives or other substances that are used in relatively small amounts Quantities should be mixed in a plastic-viscous mixture.
  • the plastic-viscous mixture to be used is arbitrary per se. Consequently for example, such mixing devices as those set forth above can not only for the admixture of additives in concrete, but also wherever something has a mixture with plastic-viscous behavior must be mixed. Applications are thus in the construction industry, Oil refining, pyrometallurgical addition in the extraction of metals Ores, alloying metals, pasta production, introduction of Additives in doughs, for example of nuts in bread, berries, etc.
EP04102373A 2004-05-28 2004-05-28 Mélangeur et procédé pour l'addition d'un additif à un mélange pompable Withdrawn EP1600205A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04102373A EP1600205A1 (fr) 2004-05-28 2004-05-28 Mélangeur et procédé pour l'addition d'un additif à un mélange pompable
PCT/EP2005/052447 WO2005115600A1 (fr) 2004-05-28 2005-05-30 Dispositif melangeur et procede permettant d'ajouter un adjuvant a un melange apte au pompage
EP05752749A EP1758672A1 (fr) 2004-05-28 2005-05-30 Dispositif melangeur et procede permettant d'ajouter un adjuvant a un melange apte au pompage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04102373A EP1600205A1 (fr) 2004-05-28 2004-05-28 Mélangeur et procédé pour l'addition d'un additif à un mélange pompable

Publications (1)

Publication Number Publication Date
EP1600205A1 true EP1600205A1 (fr) 2005-11-30

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Family Applications (2)

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EP04102373A Withdrawn EP1600205A1 (fr) 2004-05-28 2004-05-28 Mélangeur et procédé pour l'addition d'un additif à un mélange pompable
EP05752749A Withdrawn EP1758672A1 (fr) 2004-05-28 2005-05-30 Dispositif melangeur et procede permettant d'ajouter un adjuvant a un melange apte au pompage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP05752749A Withdrawn EP1758672A1 (fr) 2004-05-28 2005-05-30 Dispositif melangeur et procede permettant d'ajouter un adjuvant a un melange apte au pompage

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EP (2) EP1600205A1 (fr)
WO (1) WO2005115600A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2436496A1 (fr) * 2010-10-01 2012-04-04 Sika Technology AG Dispositif de mélange pour mélanges aptes au pompage, en particulier pour béton projeté
WO2012042012A1 (fr) * 2010-10-01 2012-04-05 Sika Technology Ag Appareil mélangeur pour mélanges pompables et procédé s'y rapportant
EP3939695A1 (fr) * 2020-07-14 2022-01-19 Sika Technology Ag Dispositif et procédé d'ajout et de mélange d'un additif dans un mélange durcissable par voie hydraulique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161508A (en) * 1938-08-12 1939-06-06 Claude W Ensor Molasses feed mixer
DE1058022B (de) * 1957-06-27 1959-05-27 Bayer Ag Verfahren und Vorrichtung um mindestens eine Zusatzfluessigkeit einer im kontinuierlichen Strom fliessenden viskosen Masse durch Umruehren beizumischen
GB1214818A (en) * 1966-12-19 1970-12-02 Larsen Hans A Improvements in and relating to apparatuses for introducing one fluid into another
EP1347092A1 (fr) * 2002-03-21 2003-09-24 Andritz AG Procédé et dispositif de mélange de substances fluides dans des matériaux fluides
US20040013032A1 (en) * 2002-07-17 2004-01-22 Itt Manufacturing Enterprise, Inc. Method and apparatus for injecting a chemical into a process upstream of an inline mixer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161508A (en) * 1938-08-12 1939-06-06 Claude W Ensor Molasses feed mixer
DE1058022B (de) * 1957-06-27 1959-05-27 Bayer Ag Verfahren und Vorrichtung um mindestens eine Zusatzfluessigkeit einer im kontinuierlichen Strom fliessenden viskosen Masse durch Umruehren beizumischen
GB1214818A (en) * 1966-12-19 1970-12-02 Larsen Hans A Improvements in and relating to apparatuses for introducing one fluid into another
EP1347092A1 (fr) * 2002-03-21 2003-09-24 Andritz AG Procédé et dispositif de mélange de substances fluides dans des matériaux fluides
US20040013032A1 (en) * 2002-07-17 2004-01-22 Itt Manufacturing Enterprise, Inc. Method and apparatus for injecting a chemical into a process upstream of an inline mixer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2436496A1 (fr) * 2010-10-01 2012-04-04 Sika Technology AG Dispositif de mélange pour mélanges aptes au pompage, en particulier pour béton projeté
WO2012042012A1 (fr) * 2010-10-01 2012-04-05 Sika Technology Ag Appareil mélangeur pour mélanges pompables et procédé s'y rapportant
US9364969B2 (en) 2010-10-01 2016-06-14 Sika Technology Ag Mixing apparatus for pumpable mixtures and method related thereto
EP3939695A1 (fr) * 2020-07-14 2022-01-19 Sika Technology Ag Dispositif et procédé d'ajout et de mélange d'un additif dans un mélange durcissable par voie hydraulique
WO2022013043A1 (fr) * 2020-07-14 2022-01-20 Sika Technology Ag Dispositif et procédé pour ajouter et mélanger un additif à un mélange à prise hydraulique

Also Published As

Publication number Publication date
EP1758672A1 (fr) 2007-03-07
WO2005115600A1 (fr) 2005-12-08

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