EP1886723A1 - Einstellbarer statischer Mischer - Google Patents

Einstellbarer statischer Mischer Download PDF

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Publication number
EP1886723A1
EP1886723A1 EP06254207A EP06254207A EP1886723A1 EP 1886723 A1 EP1886723 A1 EP 1886723A1 EP 06254207 A EP06254207 A EP 06254207A EP 06254207 A EP06254207 A EP 06254207A EP 1886723 A1 EP1886723 A1 EP 1886723A1
Authority
EP
European Patent Office
Prior art keywords
mixer
mixing
plate
pipe section
positions
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
EP06254207A
Other languages
English (en)
French (fr)
Other versions
EP1886723B1 (de
Inventor
Robert W Glanville
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP06254207A priority Critical patent/EP1886723B1/de
Priority to DE602006006438T priority patent/DE602006006438D1/de
Priority to AT06254207T priority patent/ATE429281T1/de
Publication of EP1886723A1 publication Critical patent/EP1886723A1/de
Application granted granted Critical
Publication of EP1886723B1 publication Critical patent/EP1886723B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • 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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31423—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the circumferential direction only and covering the whole circumference
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4311—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being adjustable

Definitions

  • This invention relates to mixing devices commonly referred to as static mixers.
  • static mixers are disc-like in shape and include a plate having a central opening or orifice of various fixed geometric configurations and mounted in a pipe through which fluid passes so as to create a turbulent mixing action to the fluid such that other materials introduced into the stream generally via injection nozzles located downstream and generally adjacent the plate are uniformly mixed with the fluid.
  • a mixer having a plate adapted for mounting within a pipe section and defining a mixing orifice, the plate being adjustably movable to a plurality of operable positions within the pipe section for effecting different degrees of mixing.
  • a mixing system comprising a first mixer comprising a plate mounted in a pipe section and defining a mixing orifice, and a second mixer as set forth above, the first and second mixers being spaced apart from each other along the flow axis of the pipe section.
  • the static mixer has a generally centrally disposed orifice disposed within a generally flat plate adapted for mounting within a pipe such that the plate is adjustably moveable to various alternate operable positions between a first essentially non-mixing position wherein the plate edge is disposed in line with the fluid flow within the pipe to a fully mixing position wherein the plate face is disposed normal to the fluid flow within the pipe.
  • the device 10 is of an overall circular outside configuration, that is, a disc-like body 12 including an outside flange portion 14 extending inwardly from the outer periphery 16 of the disc 12 approximately one third of the radius of the entire disc 12 and a pair of radially opposed flaps 18 inwardly extending from the inner periphery 20 of such flange towards each other but not touching so as to form, in essence, a central open area 22 of a dumbbell-type configuration.
  • the flange 14 includes flat opposed upstream and downstream surfaces 14a and 14b which project into the fluid stream, that is, portions of the fluid stream (generally the portions closer to the pipe wall) contact and, in effect, are diverted by surface 14a prior to passing through the central open area formed by the inner peripheral surface 20.
  • the flaps 18 are bent downwardly inwardly towards the flow direction of the fluid through the pipe 24 in which the device 10 is mounted.
  • Such mounting of the device 10 in the pipe 24 is accommodated by an outer plate 26 of cylindrical configuration and including a radially outwardly extending step 28 on the upstream side thereof such that the periphery 16 of the disc body may contact such step 28 and be held within the confines of the pipe 24 thereby.
  • Pipe collars 30 may be provided at opposed ends of the pipe 24 to accommodate the insertion of the plate 26 therebetween and affixation thereto by bolts or other conventional means (not shown) passing through the plate and collars 26, 30 respectively.
  • the flaps preferably 18 as well as the flange 14 extend inwardly into the fluid flow and that additionally the flaps extend at an angular relationship to such internal pipe or wall surface of approximately 15 degrees in the downstream direction but could even extend at angles of 25 or to 40 degrees.
  • the configuration of the flaps 18 is semi-elliptical or semi-circular such that defined open area 22 is entirely made up of rounded boundaries, that is, the areas where the flaps 18 meet the internal periphery 20 of the flange 14 are rounded.
  • the present invention utilizes the above-described static mixers by installing a first mixer in a fixed position in an upstream location. Such first mixer is adapted to provide good mixing at high fluid velocities.
  • a second but variable position static mixer is installed downstream therefrom. The second mixer is dimensioned to provide efficient mixing for low fluid velocities and when coupled with the first mixer in the subject system can provide efficient mixing over a wide range of fluid velocities unachievable with systems incorporating only one of the static mixers in a fixed position.
  • a conventional .9 beta mixer with standard chemical injection nozzles downstream of one or both trailing tabs.
  • a second movable .7 beta ratio mixer is installed two pipe diameters downstream from the first fixed mixer.
  • the second mixer is designed to pivot 90 degrees on its vertical axis (same as a disc in a butterfly valve).
  • the rotary position of this second mixer is controlled either by an externally mounted operating lever or by a standard electric butterfly valve operator (gear motor) hereinafter referred to as means for pivoting mixer plate (see Fig. 6).
  • the first .9 beta mixer provides good mixing and low headloss.
  • the second .7 beta mixer is rotated so that the disc is parallel to the direction of flow thus providing very little additional headloss and mixing.
  • This fully open (pivoted 90 degrees) position of the second mixer plate is shown in Fig. 6.
  • the second mixer (the .7 beta mixer) is progressively rotated closed (right angles to the direction of flow).
  • the second.7 beta mixer would be completely closed thus providing a .9 beta mixer followed by the.7 beta mixer.
  • variable static mixer system above described provides excellent mixing and minimal headloss for all pipe velocities.
  • the position of the movable second mixer could be automatically controlled to provide constant headloss over a range of velocities.
  • each of the mixer plates may be that of the plates described in U.S. Patent No. 5,839,828 issued to the present applicant, Robert W. Glanville, November 24, 1998 and which is hereby incorporated into the present application by specific reference thereto.
  • the phrase "designed to pivot 90 degrees” means that the second mixer plate is adapted to rotate on its vertical axis from a fully mixing position or closed position as shown in Figs. 2 and 5 to an essentially non-mixing or fully open position as shown in Fig. 6 and that the second mixer plate could, of course, encompass slightly less or much greater rotational angles so long as the above described mixing modes as well as intermediate mixing modes are accomplished.
  • additive material is introduced into the system 100 shown therein in conjunction with the first mixer 10.
  • additive materials are injected through pipes or quills 38 that lead to injection ports 40 in the plates 26 on the downstream side of the mixer.
  • the particular system shown in the drawings utilizes a fixed static mixer 10 having a beta of .9 that provides good mixing at high velocities.
  • a separation distance of two pipe diameters was utilized with the effective results as indicated above. It is believed that such separation distance of at least two pipe diameters should be maintained for mixing efficiency and physical placement
  • the movable mixer 102 is of the same general configuration and type as the first mixer 10 but is mounted so as to move, i.e., pivot, from a first non-mixing position as shown in Fig. 6 wherein the plate-like body 112 thereof is positioned so that the fluid stream impinges on the narrow vertically disposed edge 113 thereof and thus, in effect, causes little or no headloss or mixing action to a second fully engaged mixing position as shown in Fig. 5 wherein the body 112 is positioned with the face 115 thereof across the pipe opening such that the peripheral flange 117 thereof and the orifice or central open area 122 are in full contact with the fluid flow.
  • the static mixer exhibits the characteristics of its beta number, that is, if the second mixer is a .7 beta, it will exhibit those mixing characteristics. In this way, the system can thus be efficiently utilized for high flow as well as lower flow by regulating the movable mixer to either its non-mixing or mixing positions.
  • such may comprise of known components such as butterfly valves and include such simple mechanisms as a hand movable handle or knob 132 connected to a rod 134 passing thru the outer plate 136 and, in turn, attached to the flange for rotational movement thereof.
  • the vertical axis of rotation of the butterfly-type valve action of the movable flange 90 degrees in either direction as shown in Fig. 6 could be shifted to the horizontal where the flange edge would be positioned horizontally across the pipe in the non-mixing first position.
  • a similarly horizontally positioned flange of the second mixer could be incorporated within a conventional swing gate check valve structure such as shown by Fig. 6A such that the non-mixing position is equivalent to the fully open position of the mixer plate adjacent to the valve body and in such case attached to the operating hinge and the mixing position equivalent to the closed position of the valve across the flow path.
  • the operating hinge mechanism as well as the mixer plate in its non-mixing position can be housed in the upper chamber of the valve.
  • a standard gate valve structure as shown in Fig. 6B could support the mixer plate of the movable mixer by attaching such to the operating spindle such that moving the spindle up or down positions the mixer flange either into, out of or partially into the fluid stream.
  • the preferred form of the invention positions a movable static mixer preferably of a low beta valve downstream from a fixed static mixer usually of a higher beta value; however, it has been found that efficient mixing results can be achieved when a single movable static mixer is placed in the fluid stream, i.e., use of the second movable mixer, without the first fixed static mixer.
  • the structure supporting the mixing orifice (or orifices or orifice pattern) is not entirely within the plane defined by the plate surface, e.g., the supporting structure extends outwardly thereof, that the non-mixing position in those situations wherein the plate edge is disposed in line with the fluid flow that portions of the supporting structure may project into the fluid stream and cause some turbulence but with only minimal mixing consequences.
  • the fixed mixer can be directly mounted such as by welding to the pipeline.
  • additives can be introduced at other points other than through the pipes or quills and that the material comprising the fluid flow in the pipe could itself compose unmixed feed.
  • a variable static mixer and system for accommodating variable and different flows in a pipeline so as to produce maximum mixing efficiency including a first mixer mounted in the pipeline and a second mixer mounted in the pipeline at a downstream location wherein the second mixer has a plate with a mixing orifice which plate is adapted to move between non-mixing and mixing positions.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Accessories For Mixers (AREA)
EP06254207A 2006-08-10 2006-08-10 Mischsystem für Rohrleitung mit einstellbarem statischen Mischer Not-in-force EP1886723B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP06254207A EP1886723B1 (de) 2006-08-10 2006-08-10 Mischsystem für Rohrleitung mit einstellbarem statischen Mischer
DE602006006438T DE602006006438D1 (de) 2006-08-10 2006-08-10 Mischsystem für Rohrleitung mit einstellbarem statischen Mischer
AT06254207T ATE429281T1 (de) 2006-08-10 2006-08-10 Mischsystem für rohrleitung mit einstellbarem statischen mischer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06254207A EP1886723B1 (de) 2006-08-10 2006-08-10 Mischsystem für Rohrleitung mit einstellbarem statischen Mischer

Publications (2)

Publication Number Publication Date
EP1886723A1 true EP1886723A1 (de) 2008-02-13
EP1886723B1 EP1886723B1 (de) 2009-04-22

Family

ID=37575311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06254207A Not-in-force EP1886723B1 (de) 2006-08-10 2006-08-10 Mischsystem für Rohrleitung mit einstellbarem statischen Mischer

Country Status (3)

Country Link
EP (1) EP1886723B1 (de)
AT (1) ATE429281T1 (de)
DE (1) DE602006006438D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015197677A1 (en) * 2014-06-24 2015-12-30 Tetra Laval Holdings & Finance S.A. A liquid product mixer, and a method for mixing flowing liquid products
CN112675770A (zh) * 2020-12-30 2021-04-20 江苏氟豪防腐科技有限公司 钢衬聚四氟乙烯管道混合器

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL78461C (de) *
US2624541A (en) 1946-11-29 1953-01-06 Askania Regulator Co Butterfly valve
GB730046A (en) 1952-11-03 1955-05-18 Pyrene Co Ltd Improvements relating to nozzles
DE2023961A1 (de) * 1970-05-15 1971-11-25 Masheder Design Studies Ltd Klappenventil
EP0095791A2 (de) 1982-05-28 1983-12-07 Shell Internationale Researchmaatschappij B.V. Mischvorrichtung
US4846212A (en) 1988-09-19 1989-07-11 Keystone International, Inc. Bleed valve assembly for double block and bleed system
US5265846A (en) * 1992-10-23 1993-11-30 Valv-Tech, Inc. Valve having mechanical closure assist
EP1166862A1 (de) 2000-06-19 2002-01-02 Balcke-Dürr Energietechnik GmbH Mischer für die Mischung von Gasen und anderen Newtonschen Flüssigkeiten
US6595682B2 (en) 2000-05-08 2003-07-22 Sulzer Chemtech Ag Mixing element for a flange transition in a pipeline

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL78461C (de) *
US2624541A (en) 1946-11-29 1953-01-06 Askania Regulator Co Butterfly valve
GB730046A (en) 1952-11-03 1955-05-18 Pyrene Co Ltd Improvements relating to nozzles
DE2023961A1 (de) * 1970-05-15 1971-11-25 Masheder Design Studies Ltd Klappenventil
EP0095791A2 (de) 1982-05-28 1983-12-07 Shell Internationale Researchmaatschappij B.V. Mischvorrichtung
US4846212A (en) 1988-09-19 1989-07-11 Keystone International, Inc. Bleed valve assembly for double block and bleed system
US5265846A (en) * 1992-10-23 1993-11-30 Valv-Tech, Inc. Valve having mechanical closure assist
US6595682B2 (en) 2000-05-08 2003-07-22 Sulzer Chemtech Ag Mixing element for a flange transition in a pipeline
EP1166862A1 (de) 2000-06-19 2002-01-02 Balcke-Dürr Energietechnik GmbH Mischer für die Mischung von Gasen und anderen Newtonschen Flüssigkeiten

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015197677A1 (en) * 2014-06-24 2015-12-30 Tetra Laval Holdings & Finance S.A. A liquid product mixer, and a method for mixing flowing liquid products
CN112675770A (zh) * 2020-12-30 2021-04-20 江苏氟豪防腐科技有限公司 钢衬聚四氟乙烯管道混合器

Also Published As

Publication number Publication date
ATE429281T1 (de) 2009-05-15
EP1886723B1 (de) 2009-04-22
DE602006006438D1 (de) 2009-06-04

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