EP2719448B1 - Treatment apparatus for highly viscous fluid - Google Patents

Treatment apparatus for highly viscous fluid Download PDF

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Publication number
EP2719448B1
EP2719448B1 EP13150447.4A EP13150447A EP2719448B1 EP 2719448 B1 EP2719448 B1 EP 2719448B1 EP 13150447 A EP13150447 A EP 13150447A EP 2719448 B1 EP2719448 B1 EP 2719448B1
Authority
EP
European Patent Office
Prior art keywords
rotating body
treatment
highly viscous
viscous fluid
notches
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.)
Active
Application number
EP13150447.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2719448A1 (en
Inventor
Masakazu Inoue
Seiji Nagai
Yoshihiro Kanemaru
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.)
Inoue Mfg Inc
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Inoue Mfg Inc
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Publication of EP2719448A1 publication Critical patent/EP2719448A1/en
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    • 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
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/053—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials
    • B01F27/0531—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials with particular surface characteristics, e.g. coated or rough
    • 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
    • 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
    • B01F23/50—Mixing liquids with solids
    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/272—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces
    • B01F27/2722—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces provided with ribs, ridges or grooves on one surface

Definitions

  • the present invention relates to a treatment apparatus according to the preamble of claim 1.
  • Such a treatment apparatus is disclosed in US-A-5 141 328 , which shows a rotating body of a high speed mixing apparatus.
  • the rotor has an outer surface which is embossed with a repeating pattern of pyramidal shapes, each pyramidal shape having four triangular faces which meet at an apex.
  • Each face has a base edge which forms grooves in the rotor for directing the flow of slurry in direction of 45° relative to the rotor's axis of rotation.
  • US-A-2009 0 230 223 discloses an apparatus for mixing a polymer composition wherein a cylindrical mixing element comprises on the outer surface inlet channels, outlet channels, barrier flights and quiescent channels disposed between inlet and outlet channels. Further sealing flights are disposed between inlet and outlet channels.
  • the barrier flights create different size gaps with corresponding different degrees of shear.
  • the present invention relates to a treatment apparatus for a highly viscous fluid, by which solid/liquid-type treatment materials in various fields such as chemistry, medicines, electronics, ceramics, foods or feed, can be pulverized by a liquid-passing treatment without using dispersion media or beads.
  • the bead mill has such a structure that treating materials are mixed with dispersion media or beads in a vessel, the mixture is stirred by a rotator which rotates in the vessel, and dispersion is carried out by a shearing or impact action caused by the dispersion media, the dispersion media may sometimes be abraded or damaged by impact or friction caused by stirring motion. Contamination thereby caused may be incorporated into the treatment materials, and undesired result in view of quality may possibly be caused.
  • large power is needed to move the dispersion media, and it is also required to pass the mixture through a media-separating apparatus (separator) to separate the dispersion media from the treatment materials after the treatment, whereby internal resistance is increased.
  • JP-A-2007-125518 proposes a treatment apparatus using no beads.
  • the surface of a rotator is formed to be smooth, the treatment materials cause slippage when the treatment materials are a highly viscous fluid, whereby it becomes difficult to apply high shearing stress to the materials and it is sometimes difficult to conduct sufficient dispersion treatment.
  • the present inventors have focused on a wet-type media dispersing machine or bead mill of a so-called annular type as described in, for example, the above-mentioned JP-A-3-178326 , found such a structure that is possible to conduct pulverization of particles without forming hard agglomerate or agglomerate even when no dispersion media or beads are used, and accomplished the treatment apparatus as explained below.
  • the treatment apparatus of the present invention is a treatment apparatus for production of solid/liquid type treatment materials, which conducts a mixing and kneading, kneading or dispersion treatment of treatment materials of a highly viscous fluid preliminarily mixed and kneaded having a viscosity range of 10 to 2, 500 dPa ⁇ s, without using dispersion media.
  • This treatment apparatus comprises a vessel having a supply port and a discharge port of treatment materials, a rotating body rotatably disposed in the vessel, and an annular fine gap formed between an inner face of the vessel and an outer periphery face of the rotating body for passage of the treatment materials, while being subject to the treatment by the rotating body, wherein the rotating body has a surface on which notches are formed.
  • the notches are formed on the surface of the rotating body by preferably applying a knurling process.
  • the rotating body is formed in a tubular body having a circular cross-section, the notches are formed over the outer periphery face in its entirety.
  • the rotating body is formed in a tubular body with a modified cross-section by providing groove portions at intervals in a circumferential direction on the outer periphery face to form tooth-like projections extending in a longitudinal direction, the notches are formed on the outer periphery face of the tooth-like projections.
  • the effective or apparent surface area of the rotating body is expanded by the notches than the surface area of a smooth face.
  • the roughening rate of this instance i.e. the ratio of the effective or apparent surface area to a projected surface area on a horizontal face is preferably about. 1.05 to 2.35.
  • the above annular fine gap is preferably about 1.0 to 10 mm.
  • an annular fine gap is formed between an inner face of the vessel and an outer periphery face of the rotating body for passage of the treatment materials, while being subject to the treatment by the rotating body, and notches are formed on the surface of the rotating body which faces the annular fine gap, whereby the effective surface area of the rotating body can be substantially increased and at the same time, its friction coefficient can be increased. Therefore, a high shearing stress can be applied to the treatment materials being under passing between the annular fine gap without slippage of the rotating body, and the shearing rate can be lowered. Further, since no dispersion media or beads are used, the internal pressure of the vessel can be lowered and there is no influence of contamination by abrasion of dispersion media or the like. Since there is no necessity of the media-separating apparatus or separator, it is possible to conduct the dispersion treatment efficiently at low energy.
  • the treatment materials are subjected to compression and shearing actions at the notches formed on the tooth-like projections and to release and expansion actions at the groove portions between the projections at which no notches are provided. And, the treatment materials are repeatedly subjected to the compression and shearing actions and the release and expansion actions while the materials flow from the supply port towards the discharge port side. Accordingly, a dispersion treatment by compression, shearing and expansion can be made as if the materials are treated by a dispersion treatment with a roll mill, and uniform pulverization can be further securely made.
  • the roughening rate (r) on the surface of the rotating body on which the notches are provided is adjusted to be about 1.05 to 2.35, preferably about 1.15 to 1.55. If the roughening rate is higher than 2.35, the stirring resistance becomes high, large power is required, a phenomenon of sticking of the treatment materials to the surface of the rotating body is seen, and it becomes difficult to control the temperature of the treatment materials. If the roughening rate is lower than 1.05, in a case where the treatment materials are of the upper limit side of the viscosity range of the highly viscous fluid as the subject of the present invention, a slippage phenomenon or an accompanying rotation phenomenon by clogging is seen, whereby it becomes difficult to conduct the dispersion treatment efficiently.
  • the annular fine gap is formed to be about 1.0 to 10 mm, preferably about 2.0 to 5.0 mm. If this gap is too small, the flow resistance becomes large, large driving power is required, whereas if the gap is too large, it becomes impossible to prevent formation of hard agglomerate or agglomerate.
  • the treatment apparatus of the present invention can be applied to pulverization of solid/liquid-type treatment materials in various fields such as chemistry, medicines, electronics, ceramics, foods or feed.
  • the treatment apparatus of the present invention has a vessel 1 and a rotating body or rotor 2 which rotates in the vessel.
  • the vessel 1 communicates to a supply port 3 and a discharge port 4 for the treatment materials such as highly viscous slurry, and is provided with a jacket 5 through which temperature-controlling media such as cooling water are flown around the vessel, and the jacket 5 is provided with a flow inlet 6 and a flow outlet 7 for the temperature-controlling media.
  • the rotating body 2 is rotated by a driving shaft 9 which is connected to a driving motor (not shown) through a mechanical seal 8.
  • An annular fine gap 10 is formed between an inner wall face of the vessel 1 and an outer periphery face of the rotating body 2. Treatment materials supplied into the vessel 1 from the supply port 3 by use of a supply pump (not shown) are flown towards the discharge port and stagnate in the annular fine gap 10.
  • the size of the annular fine gap 10 is about 1.0 to 10 mm, preferably about 2.0 to 5.0 mm.
  • the treatment materials to be supplied into the vessel are optimally a highly viscous paste within a viscosity range of about 10 to 2,500 dPa ⁇ s. If it is less than 10 dPa ⁇ s, the viscosity is too low and brings about insufficient shearing stress unless the rotation rate of the rotating body is maximized.
  • the rotating body 2 is formed in a tubular shape of a circular cross section.
  • the treatment materials continuously receive compression and shearing actions by the rotation of the rotating body.
  • the rotating body is formed in a tubular body with a modified cross-section by providing groove portions 11 at intervals in a circumferential direction on the outer periphery face to form tooth-like projections 12 extending in a longitudinal direction of the rotating body.
  • the treatment materials are subjected to compression and shearing at the tooth-like projections and release and expansion at the groove portions, and receive these actions repeatedly and then are discharged from the discharge port.
  • Notches 13 are formed on the outer periphery face in its entirety when the rotating body 2 is formed to have a circular cross section or on the surface of the tooth-like projections 12 when the rotating body is formed to have a modified cross section.
  • the notches 13 are preferably formed by a knurling process.
  • the shape of the notches 13 is formed to have horizontal lines as shown in Fig.1 , a parallel knurl such as oblique lines as shown in Fig.4 , or a twill knurl form such as rectangular, cross or diagonal as shown in Fig.5 and Fig.6 .
  • fine projections 14 formed by the notches are formed to have a height of about 1.0 to 0.1 mm, preferably about 0.6 to 0.3 mm.
  • the height depends on the size of secondary aggregation contained in the solid/liquid type treatment materials, but when the height is about 1.0 mm or higher, large driving power is required and temperature control becomes difficult. Moreover, when the height is about 0.1 mm or lower, accompanying rotation phenomenon by clogging is seen at the upper limit side of the viscosity range.
  • the fine projections 14 formed by the notches 13 are formed in various shapes. For example, in the case of rectangular fine projections as shown in Fig.7 , an angle ⁇ of a slope of a dent defined by the fine projections 14 is about 90 degrees, the distance d between peaks of the projections is about 1 mm, and the height is about 0.5 mm.
  • the effective surface area of the rotating body 2 becomes larger than the surface area of a rotating body of a smooth face on which no notches are formed.
  • the degree of increment of the surface can be represented by a roughening rate (r) i.e. the ratio of the effective or apparent surface area to a projected surface area on a horizontal face.
  • the effective or apparent surface area of the rotating body is increased by r times as compared with the surface area of a conventional rotating body having a smooth face, the contact area with the treatment materials can be increased, and the shearing stress can securely be applied reflecting the increase.
  • the powder particles contained in the treatment materials are particles of a high hardness
  • the ceramics may be of a coarse-surface ceramic material for which surface treatment has not been made.
  • the surface of the rotating body has a roughening rate (r) of about 1.05 to 2.35 as compared with the surface of normal ceramics for which a surface treatment has been made, and therefore such a coarse-surface ceramic material may be used as it is.
  • the circumferential velocity rotational speed of the rotating body is desirably within a range of about 3 to 30 m/sec, preferably about 5 to 25 m/sec. It is advisable to operate the rotating body under such condition that the temperature of the treatment materials is 60°C or lower to the utmost. If the circumferential velocity is less than 3 m/sec, the shearing stress is insufficient, the treatment materials pass through the annular fine gap without treatment by the rotating body, and no dispersion action is applied, thereby receiving substantially no dispersion effect.
  • the circumferential velocity is 30 m/sec or higher, large driving force is required and heat generation becomes high, and it becomes difficult to keep the temperature of the treatment materials at 60°C or lower even if the viscosity is adjusted, thereby bringing about deterioration of properties of the treatment materials and adverse influence on the product quality.
  • a high viscosity paste having a white pigment mixed and kneaded into an epoxy type adhesive was treated by an apparatus using no beads as shown in Fig.1 .
  • the annular fine gap between the inner wall face of the vessel and the outer periphery face of the rotating body was 2 mm.
  • the roughening rate of the rotating body was about 1.45.
  • the viscosity of the paste was 2,000 dPa ⁇ s, and when the circumferential velocity of the rotating body was 10 m/sec, the particle size of the obtained paste was 10 ⁇ m.
  • a high viscosity paste having fillers mixed and kneaded into an epoxy type adhesive was treated by an apparatus using no beads as shown in Fig.1 .
  • the mean particle diameter at this time was 60 to 70 ⁇ m (rough particle diameter: 90 ⁇ m).
  • the annular fine gap between the inner wall face of the vessel and the outer periphery face of the rotating body in this apparatus was 5 mm.
  • the roughening rate of the rotating body was about 2.00.
  • the viscosity of the paste was 2,020 dPa ⁇ s, and when the circumferential velocity of the rotating body was 10 m/sec, the particle size was 10 ⁇ m, and the treatment time was about a half of a conventional bead mill.
  • a high viscosity paste having a plastic colorant and a white pigment mixed and kneaded was treated by an apparatus using no beads as shown in Fig.1 .
  • the annular fine gap between the inner wall face of the vessel and the outer periphery face of the rotating body was 5 mm.
  • On the surface of the rotating body notches having fine projections as shown in Fig. 7 of which the angle of slopes was 90 degrees, the shape was square in plan view and the height was 0.5 mm, were formed by twill knurling.
  • the roughening rate on the surface of the rotating body was about 1.45.
  • the viscosity of the paste was 260 dPa ⁇ s, and when the circumferential velocity of the rotating body was 15 m/sec, the particle grain size was 30 ⁇ m.
  • fine notches are formed on the surface of the rotating body by a knurling process, by which the roughening rate (r) of the surface of the rotating body which is used in contact with the treatment materials is made more than 1.
  • the effective or apparent surface area of the rotating body becomes r times the surface area of a rotating body having a smooth face, by which the contact area is increased and at the same time, the friction coefficient can be increased to prevent slippage, whereby the shearing stress from the rotating body can be sufficiently transmitted to the treatment materials and efficient dispersion can be conducted.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)
EP13150447.4A 2012-10-12 2013-01-08 Treatment apparatus for highly viscous fluid Active EP2719448B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012226977A JP6023541B2 (ja) 2012-10-12 2012-10-12 高粘性流体の処理装置

Publications (2)

Publication Number Publication Date
EP2719448A1 EP2719448A1 (en) 2014-04-16
EP2719448B1 true EP2719448B1 (en) 2015-10-14

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ID=47563185

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EP13150447.4A Active EP2719448B1 (en) 2012-10-12 2013-01-08 Treatment apparatus for highly viscous fluid

Country Status (5)

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EP (1) EP2719448B1 (ja)
JP (1) JP6023541B2 (ja)
KR (1) KR101477555B1 (ja)
CN (1) CN103721592B (ja)
ES (1) ES2552185T3 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6267609B2 (ja) * 2014-09-11 2018-01-24 株式会社井上製作所 スラリーの処理方法及びそれに用いる処理装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969960A (en) * 1957-06-05 1961-01-31 Mobay Chemical Corp Mixing apparatus
DE1457182C3 (de) * 1965-07-26 1975-04-24 Wacker Chemie Gmbh Vorrichtung zum kontinuierlichen Mischen
US3684732A (en) * 1967-10-11 1972-08-15 Union Carbide Corp Process for producing a formable collagen dispersion
GB1307926A (en) * 1970-05-22 1973-02-21 Pliz G Maschinenfabrik J S Pet Process and apparatus for continuous flow mixing blending and homogenising pasty and flowable materials
NL8100247A (nl) * 1981-01-20 1982-08-16 Tno Werkwijze voor het mengen en kneden van hoogvisceuze materialen alsmede menginrichting ten gebruike daarbij.
JPH0622662B2 (ja) 1989-12-05 1994-03-30 株式会社井上製作所 媒体分散機
US5141328A (en) * 1990-05-23 1992-08-25 Dilley Jerry D High speed mixing apparatus
JPH10216408A (ja) * 1996-12-02 1998-08-18 Kobayashi Seisakusho:Kk 凝集剤の溶解機
JP3184797B2 (ja) * 1998-03-19 2001-07-09 ミヤマ株式会社 ミキシング装置
KR20020074560A (ko) * 2001-03-20 2002-10-04 이종원 교차 격자형 유체 믹서기
JP2003275555A (ja) * 2002-01-15 2003-09-30 Sumitomo Bakelite Co Ltd 固液材料の混合方法および混合装置
JP2007125518A (ja) 2005-11-07 2007-05-24 Chuo Kakoki Kk 液状原料の処理装置および処理方法
JP2008049508A (ja) * 2006-08-23 2008-03-06 Hitachi Ltd 高粘度樹脂の混合装置
KR200439861Y1 (ko) * 2006-12-05 2008-05-09 양재학 고추분쇄기용 예비분쇄형 이송스크류
JP4877996B2 (ja) * 2007-03-23 2012-02-15 キユーピー株式会社 高粘性液体用気泡分散乳化装置及びそれを用いた気泡入り水中油型乳化食品の製造方法
JP2009018275A (ja) * 2007-07-13 2009-01-29 Inoue Mfg Inc 湿式媒体分散機及び湿式媒体分散方法
US8313051B2 (en) * 2008-03-05 2012-11-20 Sealed Air Corporation (Us) Process and apparatus for mixing a polymer composition and composite polymers resulting therefrom

Also Published As

Publication number Publication date
JP6023541B2 (ja) 2016-11-09
CN103721592A (zh) 2014-04-16
KR20140047490A (ko) 2014-04-22
JP2014076441A (ja) 2014-05-01
KR101477555B1 (ko) 2014-12-30
ES2552185T3 (es) 2015-11-26
EP2719448A1 (en) 2014-04-16
CN103721592B (zh) 2015-11-18

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