EP0882495A1 - Mischen von Fluiden - Google Patents

Mischen von Fluiden Download PDF

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Publication number
EP0882495A1
EP0882495A1 EP98304498A EP98304498A EP0882495A1 EP 0882495 A1 EP0882495 A1 EP 0882495A1 EP 98304498 A EP98304498 A EP 98304498A EP 98304498 A EP98304498 A EP 98304498A EP 0882495 A1 EP0882495 A1 EP 0882495A1
Authority
EP
European Patent Office
Prior art keywords
conduit
inlet
mixing device
fluid mixing
outlet
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Withdrawn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
EP98304498A
Other languages
English (en)
French (fr)
Inventor
Vincent John Murphy
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.)
Valsave Engineering Services Ltd
Original Assignee
Valsave Engineering Services Ltd
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 Valsave Engineering Services Ltd filed Critical Valsave Engineering Services Ltd
Publication of EP0882495A1 publication Critical patent/EP0882495A1/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to a device for the mixing of two or more fluids and more particularly, but not exclusively, for the mixing of a polymer solution with an additive such as water.
  • Mixing devices of the kind referred to above are used, for example, to mix such fluids for use in the paper manufacturing industry or in the production of effluent treatment. It is a difficult task to ensure that two fluids of this kind (which generally have different viscosities) are mixed uniformly.
  • Typical fluid mixing apparatus comprises a mixing block having first and second inlets which are fed respectively with a polymer solution and water from injection pumps via non-return valves.
  • the fluids are mixed together in a T-junction conduit so that the two inlet fluid streams are combined and egress in a mixed state via an outlet.
  • a portion of the mixed fluid is recirculated via a pump back into the mixing block for further mixing whereas the remainder is fed to an ageing tank where it is stored and agitated for a finite period of time.
  • the mixed fluid is then ready for supply directly to the production line via a suitable pump.
  • a fluid mixing device comprising a housing having first and second inlets and an outlet, and a mixing element in said housing partially closing the outlet and having at least one primary aperture in a central portion thereof, the primary aperture being connected to said first inlet via a conduit within said housing, and a plurality of peripheral apertures which are in communication with said second inlet, wherein the mixing element is mounted on the conduit at or near one end thereof.
  • a first fluid admitted via the first inlet will pass through the conduit and egress via the aperture in the central portion of the mixing element whereupon it encounters a second fluid that has been admitted through the second inlet and has egressed through the peripheral apertures in the mixing element.
  • the interaction of the two streams causes turbulence and a better quality of mixing.
  • the passage of the fluid through the peripheral apertures tends to create a vortex in the outlet adjacent the primary aperture thereby causing greater turbulence in the mixing.
  • the conduit may extend across the housing between the first inlet and outlet in a direction perpendicular to the second inlet.
  • the housing is T-shaped with the first inlet and outlet being aligned and substantially perpendicular to the second inlet. There may be a clearance around the conduit to accommodate fluid from said second inlet as it passed from said second inlet to the peripheral apertures of the mixing element.
  • the peripheral apertures are preferably equi-angularly spaced around the mixing element which may be disc shaped.
  • the mixing element may be rotatably mounted on the conduit and the peripheral apertures configured so that fluid incident upon them causes rotation of the mixing element relative to the conduit.
  • Figure 1 shows a T-junction conduit by which two incoming fluid streams, for example a polymer solution and water, are mixed before being fed to a production or treatment line in which the mixed solution is used.
  • two incoming fluid streams for example a polymer solution and water
  • the T-junction conduit comprises a housing 1 defining first and second annular inlets 2, 3 by which the two fluid streams are admitted and an annular outlet 4 from which the mixed solution egresses.
  • the first inlet 2 and the outlet 4 are aligned in parallel with the second inlet 3 merging substantially perpendicularly thereto.
  • Each of the first and second inlets 2, 3 has a non-return valve (not shown).
  • a removable mixing tee 5 comprising an annular conduit 6 that extends from the first inlet 2 to the outlet 4 and a dispersion ring 7.
  • the conduit 6 is coaxial with the first inlet 2 and the outlet 4 and has a terminal portion in the outlet 4 which supports the dispersion ring 7 on its exterior surface.
  • the dispersion ring 7 is of disc-like configuration having a central aperture 8 which fixedly receives the terminal portion of the conduit 6, and a plurality of peripheral apertures 9 that are equi-angularly spaced around the periphery of the ring 7. Each peripheral aperture 9 is radially offset from the central aperture 8 by the same distance.
  • the dispersion ring 7 and conduit 6 are shown in detail in Figures 2 and 3.
  • a polymer solution is fed by a pump (not shown) into the inlet 2 of the T-junction.
  • the solution passes through the conduit 6 before egressing through the central aperture 8 of the dispersion ring 7 into the outlet 4.
  • Water is fed into the second inlet 3 such that it flows into the junction of the T-shaped housing, passes around the outside of the conduit 6 and egresses through the peripheral apertures 9 in the dispersion ring 7.
  • the egression of the streams of water from the peripheral apertures 9 has the effect of creating a partial vacuum in a central region of the outlet 4 thereby generating a vortex that tends to "pull" the polymer solution through the central aperture 8 and the conduit 6.
  • the resultant turbulence from the interaction of the separate fluid streams provides good quality mixing and the mixed solution can be fed directly to the production or treatment line without the need for subsequent mixing in an ageing tank. Water is supplied to the second inlet 3 at mains pressure.
  • the T-junction conduit and the mixing tee 5 are manufactured typ+ ically from polyvinylchloride but may be constructed from any other suitable material, for example, stainless steel, carbon steel or polypropylene. They may be installed easily into both existing and new pipelines.
  • FIG. 4 A more detailed embodiment is shown in figure 4. Parts corresponding to those shown in figures 1 to 3 are indicated by the same reference numerals increased by 100 and are not further described except insofar as they differ from their counterparts of figures 1 to 3.
  • the housing 101 is in the form of a cylindrical conduit with a side port into which is fitted an annular inlet collar 110 which forms the second inlet 103.
  • the outlet 104 is similarly fitted with an annular collar 111 which is selected to be of a certain size to enable connection of the mixing device to the outlet pipework (not shown).
  • the collar is sealed to the housing 101 by means of an O-ring 112 and retaining ring 113.
  • the removeable mixing tee 105 is manufactured in this embodiment from a single piece of material so that the dispersion ring 107 is integral with the conduit 106.
  • the end of the conduit 106 opposite the dispersion ring 107 is externally threaded so as to receive a non-return pressure operated valve 114.
  • This valve 114 ensures that the polymer solution is only injected into the mixing device when it is at a certain predetermined pressure.
  • the arrangement prevents the polymer being sucked into the first inlet 102 by virtue of the vacuum created in the outlet 104 during the mixing process.
  • first inlets there may be provided two or more first inlets, conduits and central apertures to enable the mixing of two or more polymer solutions with the water.
  • the apertures 9 in the dispersion ring 7 are inclined to the longitudinal axis of the conduit 6 and inlet 2, and the dispersion ring 7 is rotatably mounted on the conduit 6. In use when water passes through the T-junction conduit the dispersion ring 7 rotates about conduit 6 thereby creating a circular turbulence to provide improved mixing.
  • FIG. 5 An embodiment of a rotating mixing tee is shown in figures 5 and 6.
  • the dispersion ring 207 has a plurality of slots 215 machined into its surface that faces the inlet 202.
  • Each slot 215 has a width substantially similar to the diameter of the peripheral apertures 209 and extends radially from a peripheral aperture 209 to the edge of the ring 207.
  • Figure 6 shows the dispersion ring 207 rotatably mounted on the conduit 206 and axially retained between a shoulder 216 machined into the exterior surface of the conduit 206 and a nut 217 that is threaded on to the end of the conduit 206.
  • the polymer solution is deflected by a baffle (not shown) placed in the inlet so as to impinge on the dispersion ring 207 at an angle that is non-coaxial with the peripheral apertures 209.
  • the impact of the solution against edges of the slots 215 causes the ring 207 to rotate on the conduit 206 thereby creating conditions for improved mixing.
  • the quality of the mixing can be adjusted by careful designing of the size of the central and peripheral apertures, the spacing of the peripheral apertures from the central apertures and the number of peripheral apertures. By making the mixing tee removeable different sized tees can be used in the same housing to meeting the flow rate requirements.
  • the outlet of the mixing device may be connected to a pipe that has one or more right-angled elbows to encourage turbulent flow and further mixing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP98304498A 1997-06-06 1998-06-08 Mischen von Fluiden Withdrawn EP0882495A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9711719 1997-06-06
GBGB9711719.6A GB9711719D0 (en) 1997-06-06 1997-06-06 Fluid mixing

Publications (1)

Publication Number Publication Date
EP0882495A1 true EP0882495A1 (de) 1998-12-09

Family

ID=10813679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98304498A Withdrawn EP0882495A1 (de) 1997-06-06 1998-06-08 Mischen von Fluiden

Country Status (2)

Country Link
EP (1) EP0882495A1 (de)
GB (1) GB9711719D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011143768A1 (en) * 2010-05-20 2011-11-24 Suncor Energy Inc. Method and device for in-line injection of flocculent agent into a fluid flow of mature fine tailings

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252076A (en) * 1939-10-31 1941-08-12 Standard Oil Dev Co Fluid mixer
GB770220A (en) * 1955-08-11 1957-03-20 Dunlop Rubber Co Apparatus for effecting mixing of liquid or plastic materials
US3680781A (en) * 1970-12-30 1972-08-01 Fuller Co Liquid spray nozzle
US3770208A (en) * 1970-11-23 1973-11-06 Ethyl Corp Mixing nozzle
FR2201121A1 (en) * 1972-10-02 1974-04-26 Jarrin Andre Flow mixing device - for liqs. and a gas, esp for treatment of polluted water
CH652046A5 (en) * 1980-05-23 1985-10-31 Coca Cola Co Tap for preparing beverages by mixing beverage extracts with water
EP0580547A1 (de) * 1992-07-24 1994-01-26 HILTI Aktiengesellschaft Mundstück für Auspressgeräte, die dem Abgeben von Zweikomponentenmassen dienen
US5388906A (en) * 1991-12-18 1995-02-14 E. I. Du Pont De Nemours And Company Static mixer for two or more fluids

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252076A (en) * 1939-10-31 1941-08-12 Standard Oil Dev Co Fluid mixer
GB770220A (en) * 1955-08-11 1957-03-20 Dunlop Rubber Co Apparatus for effecting mixing of liquid or plastic materials
US3770208A (en) * 1970-11-23 1973-11-06 Ethyl Corp Mixing nozzle
US3680781A (en) * 1970-12-30 1972-08-01 Fuller Co Liquid spray nozzle
FR2201121A1 (en) * 1972-10-02 1974-04-26 Jarrin Andre Flow mixing device - for liqs. and a gas, esp for treatment of polluted water
CH652046A5 (en) * 1980-05-23 1985-10-31 Coca Cola Co Tap for preparing beverages by mixing beverage extracts with water
US5388906A (en) * 1991-12-18 1995-02-14 E. I. Du Pont De Nemours And Company Static mixer for two or more fluids
EP0580547A1 (de) * 1992-07-24 1994-01-26 HILTI Aktiengesellschaft Mundstück für Auspressgeräte, die dem Abgeben von Zweikomponentenmassen dienen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011143768A1 (en) * 2010-05-20 2011-11-24 Suncor Energy Inc. Method and device for in-line injection of flocculent agent into a fluid flow of mature fine tailings
CN102946984A (zh) * 2010-05-20 2013-02-27 顺科能源公司 用于将絮凝剂内嵌地注入到熟化细粒尾矿的流体流中的方法和装置
AU2011256104B2 (en) * 2010-05-20 2015-02-05 Suncor Energy Inc. Method and device for in-line injection of flocculent agent into a fluid flow of mature fine tailings
CN102946984B (zh) * 2010-05-20 2016-04-13 顺科能源公司 用于将絮凝剂内嵌地注入到熟化细粒尾矿的流体流中的方法和装置
EP2571610A4 (de) * 2010-05-20 2016-08-10 Suncor Energy Inc Verfahren und vorrichtung zur reiheneinspritzung eines flockungsmittels in einen flüssigkeitsfluss aus reifem feinbruchmaterial
CN105854658A (zh) * 2010-05-20 2016-08-17 顺科能源公司 用于将絮凝剂内嵌地注入到熟化细粒尾矿的流体流中的方法和装置
CN105854658B (zh) * 2010-05-20 2019-03-26 顺科能源公司 用于将絮凝剂内嵌地注入到熟化细粒尾矿的流体流中的方法和装置
US20210170348A1 (en) * 2010-05-20 2021-06-10 Suncor Energy Inc. Method and Device for In-Line Injection of Flocculent Agent into a Fluid Flow of Mature Fine Tailings

Also Published As

Publication number Publication date
GB9711719D0 (en) 1997-08-06

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