EP1475145A2 - Agitateur - Google Patents

Agitateur Download PDF

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Publication number
EP1475145A2
EP1475145A2 EP04010919A EP04010919A EP1475145A2 EP 1475145 A2 EP1475145 A2 EP 1475145A2 EP 04010919 A EP04010919 A EP 04010919A EP 04010919 A EP04010919 A EP 04010919A EP 1475145 A2 EP1475145 A2 EP 1475145A2
Authority
EP
European Patent Office
Prior art keywords
range
bent portion
stirring blade
stirrer according
angle
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
Application number
EP04010919A
Other languages
German (de)
English (en)
Other versions
EP1475145A3 (fr
EP1475145B1 (fr
Inventor
Werner Dipl.-Ing. Himmelsbach
David Eur.-Ing. Houlton
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.)
EKATO Ruehr und Mischtechnik GmbH
Original Assignee
EKATO Ruehr und Mischtechnik GmbH
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 EKATO Ruehr und Mischtechnik GmbH filed Critical EKATO Ruehr und Mischtechnik GmbH
Publication of EP1475145A2 publication Critical patent/EP1475145A2/fr
Publication of EP1475145A3 publication Critical patent/EP1475145A3/fr
Application granted granted Critical
Publication of EP1475145B1 publication Critical patent/EP1475145B1/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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0422—Numerical values of angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
    • 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
    • B01F23/20—Mixing gases with liquids

Definitions

  • the invention relates to a stirring element, in particular for dispersing gases in liquids, consisting of a plurality of stirring blades.
  • stirring element By means of such a stirring element becomes one of the liquid to be stirred supplied gas dispersed in the smallest possible bubbles to a large Surface for the mass transfer between the gas and the liquid too create.
  • the invention has the object on the basis of shortening the mixing time, while at the same time minimizing the power loss hold.
  • each stirring blade in a Direction of rotation forward bent portion has.
  • this section is seen on the rear in the direction of rotation Formed end of the stirring blade.
  • the bent portion is seen in the radial direction in outer area and e.g. to the outer peripheral edge of the stirring blade formed extending.
  • the ratio of the radial length L1 of the bent is Radial length section L2 of the entire stirring blade in the range of about 0.2 to 1.0, preferably in the range of about 0.4 to 0.6.
  • the ratio of width B1 of the bent portion to the width B2 of the entire stirring blade in Range of about 0.1 to 1, preferably in the range of about 0.15 to 0.4.
  • the stirring blade to the plane of rotation is at an angle ⁇ adjusted in the range of about 10 ° to 45 °, preferably in the range of about 20 ° to 30 °.
  • the angle ⁇ is between the bent portion and the stirring blade in the range of about 10 ° to 45 °, preferably in the range from about 20 ° to 30 °.
  • the ratio of radius of curvature R1 of bent portion to the outer radius R2 of the stirring blade in the range of about 0 to 0.3, preferably in the range of about 0.01 to 0.15.
  • the bent portion provided with an approximately triangular end portion, for example, which has a Angle ⁇ to the bent portion forms, and directed away from the stirring blade is.
  • the angle ⁇ may be in the range of about 0 ° to 45 °, preferably in the range from about 10 ° to 30 °.
  • the stirring blade is seen at its front in the direction of rotation End provided with an end portion which at an angle ⁇ to the stirring blade and to the plane of the bent portion is bent to.
  • the angle ⁇ can be in the range of about 0 ° to +/- 40 °, preferably in the range of about 0 ° lie to +/- 15 °.
  • the ratio of width B4 of the bent portion to the total width B2 of the stirring blade in Range of about 0 to 0.5, preferably in the range of about 0.1 to 0.3.
  • the ratio of radial length L3 of about triangular end portion to the radial length L4 of the bent Section about 0 to 1.0, preferably about 0.5 to 1.0.
  • the ratio of width B3 of the approximately triangular Endabiteses to the width B1 of the bent portion about 0.05 to 0.75, preferably about 0.2 to 0.6.
  • FIG. 1 shows a plan view of an agitator 10 with a hub 12 for attachment of the stirring element 10 on a stirring shaft, not shown.
  • stirrer blades 14 are fixedly connected by means of holders 16, which are arranged at angular intervals of 120 ° to each other.
  • the stirring blades 14 can also be attached directly to a stirrer shaft.
  • the three Rhakblatter shown 14 represent only an example, it can Also, two or more blades are attached to the hub 12.
  • the axis The agitator shaft, not shown, is 18, the outer radius of the stirring blades 14th is with R2 and the direction of rotation is clockwise and is with the arrow P denotes.
  • the brackets 16 can transversely but also in a pointed or obtuse angle inclined to the axis 18 run.
  • Each stirring blade 14 is bent with a forward rotation in the direction of rotation Section 20 provided at the rear end in the direction of rotation of the Agitator blade 14 is formed, and in the radial direction over part of the radial. Length of the stirring blade 14 e.g. to the outer peripheral edge extends.
  • the ratio of the radial length L1 of the bent portion 20 to radial length L2 of the entire stirring blade 14 is for example in the range from about 0.2 to 1.0, and more preferably in the range of about 0.4 to 0.6.
  • the ratio of the width B1 of the bent Section 20 to the total width B2 of the stirring blade 14, for example in Range of about 0.1 to 1.0, and more preferably in the range of about 0.15 to 0.4.
  • the bent portion 20 is formed from a curved portion 26 with a radius of curvature R1 and an adjoining particular planar part 28, which may also be curved can be.
  • the ratio of this radius of curvature R1 to the outer radius R2 of Stirring blade 14 is for example in the range of about 0 to 0.3, and in particular in the range of about 0.01 to 0.15.
  • Starting from the stirring blade 14 extends the bent portion 20, based on the vertical Rotary axis 18, upwards, and then substantially forward in Direction of rotation of the stirring element 10.
  • Each bent portion 20 is at its front end in the direction of rotation preferably with an approximately triangular end portion 22, for example provided an angle ⁇ to the part 28 of the bent portion 20th forms, and which is directed away from the stirring blade 14.
  • the angle ⁇ is suitably in the range of about 0 ° to 45 °, and in particular in Range of about 10 ° to 30 °.
  • the tip of the triangular end portion is in the example shown directed radially outward, but it may also be directed inwards.
  • the ratio of the radial length L3 of the approximately triangular end portion 22 to the radial length L4 of the bent portion is furffle ⁇ igerweise about 0 to 1.0, and more preferably about 0.5 to 1.0.
  • the ratio of the width B3 of the end portion 22 to the width B1 of the bent portion 20 is approximately in the range of 0.05 to 0.75, and in particular in the range of about 0.2 to 0.6.
  • the stirring blade 14 is at an angle ⁇ to the plane of rotation D adjusted in the range of about 10 ° to 45 °, and in particular in the range from about 20 ° to 30 °.
  • the bent portion 20, 28 forms the stirring blade 14 an angle ⁇ , the for example, in the range of about 10 ° to 45 °, and especially in the range of about 20 ° to 30 °.
  • Each stirring blade 14 can be seen at its front end in the direction of rotation an end portion 24 which at an angle ⁇ to the stirring blade 14 and is bent to the plane of the bent portion 20, 28 to, wherein the Angle ⁇ for example in the range of about 0 ° to +/- 40 °, and in particular in Range may be from about 0 ° to +/- 15 °.
  • the ratio of the width B4 (seen in the circumferential direction) of the bent End portion 24 to the total width B2 of the stirring blade 14 is suitably in the range of about 0 to 0.5, and especially in the range of about 0.1 to 0.3.
  • the crease line between the parts 14 and 24 extends in the example shown transverse to the outer edge of the stirring blade 14, but it can also be an angle For this.
  • the direction of rotation front of the end portion 24 may, as shown, rounded and / or bevelled, the bevel be formed in particular in the radially outer region of the stirring blade 14 can.
  • the stirrer according to the invention allows good dispersion quality and only a slight decrease in power a significant shortening of the mixing time.
  • the larger area of the stirring blades 14 relative to the surface of the bent Sections 20, 28 is achieved that the radial pumping action is eccentric and has an axial component.
  • the combination of axial and radial Flow patterns lead to significantly lower mixing times in the stirred tank.
  • the approximately box-shaped shape of the bent portions 20, 28 the Formation of gas cushions behind the stirring blades substantially avoided can be reduced, power losses are reduced in the dispersion of gases.
  • the stirrer according to the invention combines thus the advantages of radially pumping and axially pumping stirrers.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
EP04010919A 2003-05-08 2004-05-07 Agitateur Expired - Lifetime EP1475145B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20307199U DE20307199U1 (de) 2003-05-08 2003-05-08 Rührorgan
DE20307199U 2003-05-08

Publications (3)

Publication Number Publication Date
EP1475145A2 true EP1475145A2 (fr) 2004-11-10
EP1475145A3 EP1475145A3 (fr) 2005-01-19
EP1475145B1 EP1475145B1 (fr) 2007-10-10

Family

ID=27588915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04010919A Expired - Lifetime EP1475145B1 (fr) 2003-05-08 2004-05-07 Agitateur

Country Status (5)

Country Link
US (1) US7296925B2 (fr)
EP (1) EP1475145B1 (fr)
AT (1) ATE375198T1 (fr)
DE (2) DE20307199U1 (fr)
DK (1) DK1475145T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10105663B2 (en) * 2014-04-04 2018-10-23 Milton Roy Europe Stirring propeller with blades made of sheet bent along two longitudinal bends

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WO2003074164A1 (fr) * 2002-03-01 2003-09-12 Glaxo Group Limited Melangeur rotatif et systeme associe
US7114844B2 (en) * 2003-03-03 2006-10-03 Spx Corporation Aeration apparatus and method
DE20307199U1 (de) * 2003-05-08 2003-07-10 Ekato Rühr- und Mischtechnik GmbH, 79650 Schopfheim Rührorgan
NL1027600C2 (nl) * 2004-11-26 2006-05-29 Andries Visser Inrichting en werkwijze voor het beluchten van afvalwater.
DE202006007423U1 (de) * 2006-05-09 2007-09-13 EKATO Rühr- und Mischtechnik GmbH Rührorgan
TW200944287A (en) * 2007-12-21 2009-11-01 Philadelphia Gear Corp Gas foil impeller
FI121621B (fi) * 2009-03-11 2011-02-15 Outotec Oyj Sekoitin lietteen sekoittamiseksi metallurgisissa prosesseissa
GB0907260D0 (en) * 2009-04-28 2009-06-10 Ge Healthcare Uk Ltd Method and apparatus for maintaining microcarrier beads in suspension
DE102010004206A1 (de) 2009-06-08 2010-12-09 EKATO Rühr- und Mischtechnik GmbH Rühranrodnung
KR101477936B1 (ko) * 2010-07-30 2014-12-30 토탈 리서치 앤드 테크놀로지 펠루이 촉매 슬러리 제조 시스템의 용도
US9108170B2 (en) 2011-11-24 2015-08-18 Li Wang Mixing impeller having channel-shaped vanes
FI123826B (en) * 2012-02-20 2013-11-15 Outotec Oyj Axial flow propeller blade and axial flow propeller
US9241595B2 (en) * 2013-03-01 2016-01-26 Whirlpool Corporation Cooking and mixing appliance kit
CA156862S (en) * 2013-12-04 2015-01-14 Outotec Finland Oy Impeller for hydrometallurgical mixer
DE102014110542A1 (de) * 2014-07-25 2016-01-28 EKATO Rühr- und Mischtechnik GmbH Rührorganvorrichtung
US9878295B2 (en) 2015-04-13 2018-01-30 Pall Corporation Fluid impeller for bioprocessing
EP3213811B1 (fr) * 2016-03-01 2022-10-12 Sulzer Management AG Aube pour une turbine d'un agitateur, roue et agitateur
CN107774181A (zh) * 2016-08-31 2018-03-09 上海柏阁日用品有限公司 带有叶片的液体搅拌器
DE102017003422A1 (de) * 2017-04-07 2018-10-11 Stelzer Rührtechnik International GmbH Rührblatt für ein Rührelement
US12390773B2 (en) 2019-08-15 2025-08-19 Nov Process & Flow Technologies Us, Inc. Gas dispersion system
USD953388S1 (en) * 2019-08-30 2022-05-31 Kazuo Sato Food industry machine
CN111939786A (zh) * 2020-09-02 2020-11-17 北京德鑫合众环保工程有限公司 一种厨余垃圾处理设备的搅拌仓结构

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10105663B2 (en) * 2014-04-04 2018-10-23 Milton Roy Europe Stirring propeller with blades made of sheet bent along two longitudinal bends

Also Published As

Publication number Publication date
EP1475145A3 (fr) 2005-01-19
US20040228210A1 (en) 2004-11-18
DK1475145T3 (da) 2008-02-11
US7296925B2 (en) 2007-11-20
ATE375198T1 (de) 2007-10-15
DE502004005173D1 (de) 2007-11-22
EP1475145B1 (fr) 2007-10-10
DE20307199U1 (de) 2003-07-10

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