EP0220788A2 - Mélangeur à écoulement pour liquide - Google Patents

Mélangeur à écoulement pour liquide Download PDF

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Publication number
EP0220788A2
EP0220788A2 EP86202094A EP86202094A EP0220788A2 EP 0220788 A2 EP0220788 A2 EP 0220788A2 EP 86202094 A EP86202094 A EP 86202094A EP 86202094 A EP86202094 A EP 86202094A EP 0220788 A2 EP0220788 A2 EP 0220788A2
Authority
EP
European Patent Office
Prior art keywords
chamber
impeller
drive shaft
liquids
shaft
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
EP86202094A
Other languages
German (de)
English (en)
Other versions
EP0220788B1 (fr
EP0220788A3 (en
Inventor
Garry Hoyland
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.)
Water Research Centre
Original Assignee
Water Research Centre
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 Water Research Centre filed Critical Water Research Centre
Priority to DE8686202094T priority Critical patent/DE3586721D1/de
Priority to AT86202094T priority patent/ATE81031T1/de
Priority to EP86202094A priority patent/EP0220788B1/fr
Publication of EP0220788A2 publication Critical patent/EP0220788A2/fr
Publication of EP0220788A3 publication Critical patent/EP0220788A3/en
Application granted granted Critical
Publication of EP0220788B1 publication Critical patent/EP0220788B1/fr
Expired 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
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/43—Mixing liquids with liquids; Emulsifying using driven stirrers
    • 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
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • 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
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis

Definitions

  • This invention relates to a liquid flow mixer.
  • apparatus for mixing two liquid flows which comprises a generally cylindrical chamber having at one end an axial outlet for the mixture, and one or more radial inlets for the liquids, the chamber including one or more rotatable plate-like impellers and means for driving the impellers in rotation to mix the liquids as they flow through the chamber from the inlet(s) to the outlet.
  • the liquid flows to be mixed enter the chamber substantially radially, and exit axially, thus suffering a 90° change in flow direction.
  • This change, and the effect of the rotating impeller(s), causes immediate and thorough mixing.
  • the or each impeller is mounted radially on a drive shaft which is mounted substantially axially in the cylindrical chamber.
  • the or each impeller preferably extends longitudinally of the chamber and radially outwardly of the shaft to terminate close to the wall of the chamber.
  • the mixer comprises a cylindrical body 50 constituting a mixing chamber 51.
  • the chamber is open at one end 52 (the right-hand end as shown in Figure 1) to provide an axial exit for the mixed liquids.
  • the other end of chamber 51 is closed by a low clearance impeller back-plate 53.
  • Extending through back-plate 53 and axially into chamber 51 is a drive-shaft 54 on which is mounted a circular disc 90 and three plate-­like impellers 55,56,57 each extending longitudinally of the chamber at 120° with respect to the other two (see Figure 2).
  • each impeller extends radially outwardly from the shaft 54, almost to the inner wall 58 of body 50.
  • Disc 90 at one end of the impellers (the left-hand end as viewed in Figure 1), protects the seal 63 from any debris that may be present in the suspension.
  • the drive shaft 54 is connected to a drive motor/gear box combination 60, passing through bearing assemblies 61,62 and a mechanical seal 63 on the back-plate 53.
  • a disc 64 is mounted coaxially on shaft 54, to throw leak fluid centrifugally outwardly through drainage holes 65.
  • Bearing assembly 61 includes a support member 70 conveniently mounted between two coaxially arranged cylindrical bodies 71,72 containing the bearing assembly 62, fling plate 64 and seal 63, as shown schematically in Figure 1.
  • first liquid inlet pipe 80 eg. for sewage sludge
  • liquid includes not only liquids per se but mixtures, eg. of liquids and solids.
  • two further liquid supply pipes 81,82 are shown (in practice, only one will normally be used). These could for example be used for flocculant or other dosant.
  • Pipe 81 passes through the wall of pipe 80 and both terminate level with inner wall 58 of body 50.
  • Pipe 82 is downstream of pipe 80 and is disposed radially of body 50, again terminating at inner wall 58 of body 50.
  • the appropriate diameter of inlet 80 is 200 mm and the maximum speed of drive shaft 54 is about 500 rpm.
  • suspension and flocculant (the latter in controlled quantity) are fed into chamber 51 whilst the impellers are rotated to cause mixing of the suspension and flocculant.
  • the mixture passes out of chamber 51 via end 52, for example to the filter plate press. It is preferred to add the flocculant to the suspension either as the latter enters the mixing chamber 51 or immediately thereafter.
  • the motor used in the mixer of Figures 1 and 2 can be an induction motor, a variable speed reluctance motor or a DC motor. Best results are obtained from the flocculant when the motor speed is changed during a pressing cycle in accordance with the flowrate and viscosity of the suspension, i.e. when the motor speed is turned to suit the particular flocculant/suspension mixture being treated.
  • the or each impeller is so designed as to create maximum mixing without the problem of fouling with debris such as fibres that may be present in the suspension.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Treatment Of Sludge (AREA)
EP86202094A 1985-07-15 1985-07-15 Mélangeur à écoulement pour liquide Expired EP0220788B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8686202094T DE3586721D1 (de) 1985-07-15 1985-07-15 Fluessigkeitsstroemungsmischer.
AT86202094T ATE81031T1 (de) 1985-07-15 1985-07-15 Fluessigkeitsstroemungsmischer.
EP86202094A EP0220788B1 (fr) 1985-07-15 1985-07-15 Mélangeur à écoulement pour liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86202094A EP0220788B1 (fr) 1985-07-15 1985-07-15 Mélangeur à écoulement pour liquide

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP85305044.1 Division 1985-07-15
EP85305044A Division EP0172649A3 (fr) 1984-07-26 1985-07-15 Déshydratation de suspensions de matières solides

Publications (3)

Publication Number Publication Date
EP0220788A2 true EP0220788A2 (fr) 1987-05-06
EP0220788A3 EP0220788A3 (en) 1989-04-26
EP0220788B1 EP0220788B1 (fr) 1992-09-30

Family

ID=8195826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86202094A Expired EP0220788B1 (fr) 1985-07-15 1985-07-15 Mélangeur à écoulement pour liquide

Country Status (3)

Country Link
EP (1) EP0220788B1 (fr)
AT (1) ATE81031T1 (fr)
DE (1) DE3586721D1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE580037C (de) * 1933-07-05 Walther Reuther Vorrichtung zum Mischen von pulverfoermigem, fein- und grobkoernigem Gut
DE1093335B (de) * 1954-10-14 1960-11-24 Albert Theysohn Misch- und Knetvorrichtung fuer zaehplastische Massen
US3367126A (en) * 1966-05-19 1968-02-06 John D. Howell Floating agitator
FR1488593A (fr) * 1966-08-02 1967-07-13 Ici Ltd Appareillage pour procédés chimiques et physiques
CH584269A5 (fr) * 1973-12-21 1977-01-31 Sandoz Ag
US4341476A (en) * 1977-06-03 1982-07-27 Sollich Kg Spezialmaschinenfabrik Apparatus for treating materials containing cocoa butter
FR2443872A1 (fr) * 1978-12-13 1980-07-11 Adler Sa Malaxeur, notamment pour la preparation d'une matiere composite

Also Published As

Publication number Publication date
DE3586721D1 (de) 1992-11-05
EP0220788B1 (fr) 1992-09-30
EP0220788A3 (en) 1989-04-26
ATE81031T1 (de) 1992-10-15

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