US3559959A - Impeller and mixer-settler apparatus - Google Patents

Impeller and mixer-settler apparatus Download PDF

Info

Publication number
US3559959A
US3559959A US752231A US3559959DA US3559959A US 3559959 A US3559959 A US 3559959A US 752231 A US752231 A US 752231A US 3559959D A US3559959D A US 3559959DA US 3559959 A US3559959 A US 3559959A
Authority
US
United States
Prior art keywords
baffle
vanes
vessel
impeller
mixing
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.)
Expired - Lifetime
Application number
US752231A
Inventor
Walter M Davis
Edwin A Matzner
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.)
Monsanto Co
Original Assignee
Monsanto Co
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 Monsanto Co filed Critical Monsanto Co
Application granted granted Critical
Publication of US3559959A publication Critical patent/US3559959A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • 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
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B01F27/1152—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis with separate elements other than discs fixed on the discs, e.g. vanes fixed on the discs

Definitions

  • Impellers which simultaneously provide both pumping and mixing action are known to the art. In many operations in which such impellers are utilized, the ratio of pumping to mixing action is critical. For example, in solvent extraction procedures and washing operations wherein substantially immiscible liquids are pumped into a mixer, mixed and thereafter separated, the rate at which the liquids are pumped into the mixing chamber relative to the mixing action is often critical. If the pumping action is disproportionately greater than the mixing action, the liquids will be ineffectively mixed so as to render the extraction or washing operation inefficient. Conversely, if the liquids are overly mixed, power is wasted in the mixing operation and in some cases the liquids may emulsify so as to defy separation.
  • impellers Since, in hitherto known impellers, the ratio of pumping to mixing action is fixed, such impeller must be designed and fabricated for the specific conditions of intended use. Changes in process conditions, such as desired flow rate, liquids, or liquid ratios, necessitate fabrication of specially designed impellers suited for use in the changed process.
  • a further object of the invention is to provide a mixer-settler apparatus which facilitates proper mixing of substantially immiscible liquid components followed by the rapid separation of these components.
  • impeller having vanes extending through a perforated baffle which is adjustable to vary the portion of the vanes extending on either side of the baffle and by a mixer-settler apparatus utilizing such impeller.
  • FIG. 1 is a perspective front elevation of an impeller apparatus illustrating one embodiment of this invention.
  • FIG. 2 is a perspective front elevation, partially in section, of an impeller apparatus illustrating another embodiment of this invention.
  • FIG. 3 is a front elevation in cross section of a mixersettler apparatus of this invention.
  • vanes are attached to a shaft 11 which is provided with means (not shown) for effecting rotation thereof about a vertical axis.
  • the vanes extend through perforations in a baffle 12.
  • Means for adjusting the relative positions of the baffle l2 and vanes 10 with respect to each other are provided by rods 13 connecting the baffle to collar 14.
  • the baffle can be adjusted to vary the portion of the vanes extending on either side thereof and the set screw 15 provides means for Securing the baffle in fixed position relative to the vanes. Pumping action is increased and mixing action decreased by moving the baffle in the direction shown by the arrow.
  • Both pumping and mixing action can be increased by increasing the speed of rotation of the impeller or decreased by decreasing the speed of rotation.
  • speed of rotation and the position of the baffle the desired degree of pumping and mixing action is readily obtained.
  • FIG. 2 may be advantageously employed.
  • a second baffle 12a is provided which is adjustable independently of baffle 12.
  • Baffle 12a is provided with a leaf 16 fitted with a set screw 15a which can be tightened to secure baffle 12a in fixed position. Since the area of the vanes between the baffles provides no pumping and relatively little mixing action, this embodiment of the invention permits independent adjustment of pumping and mixing action.
  • the mixer-settler apparatus of this invention will be understood by reference to FIG. 3. As shown, this apparatus comprises a mixing vessel 17 and a settling vessel 18. Means for transferring fluid from the mixing vessel to the settling vessel is provided by the lowered lip 19 of the common wall between these vessels.
  • An impeller apparatus as previously described is substantially vertically positioned in mixing vessel 17 so that the vanes 10 extend over the inlets 20 and 21.
  • the vanes are spaced from the inlets by a distance less than 0.05 times the diameter of the sweep of the vanes. If spaced a greater distance, pumping action is very inefficient.
  • liquids are pumped from the inlets, mixed, and transferred by the pumping action of the impeller from mixing vessel 17 over lowered lip 19 to the settling vessel 18.
  • a baffle 22 is disposed in the settling vessel to minimize the turbulance produced in the settling vessel by the transfer of liquid thereto.
  • the optimum baffle position for use with various flow conditions can be determined from well-understood hydrodynamic principles and routine tests.
  • the baffle also defines a channel for introduction of liquid into the settling vessel at an optimum level.
  • a mixer-settler apparatus comprising in combination:
  • variable ratio impeller apparatus comprising a perforated baffle, vanes extending through the perforations in said baffle, means for adjusting the relative position of said baffle and said vanes with respect to each other to vary the portion of said extending on either side of said baffie, and means for securing said baffle and said vanes in fixed position relative to each other, said apparatus being substantially vertically positioned in said mixing vessel, the vanes of said impeller apparatus extending over said inlets and being spaced therefrom by a distance less than 0.05 times the diameter of the sweep of said vanes;
  • a baffle disposed in said settling vessel to minimize the tur-, bulence produced in said settling vessel by transfer thereto of fluid from said mixing vessel;
  • g. means for withdrawing liquid from said settling vessel.
  • the apparatus of claim I further comprising insulation .means having heating means disposed therein at least partially surrounding said vessels.

Abstract

A variable ratio impeller apparatus in which vanes extend through perforations in a baffle which is movable to vary the proportion of the vanes extending on either side of the baffle permits adjusting the ratio of mixing action to pumping action produced by the impeller. In a mixer-settler liquid-liquid contact apparatus, the impeller apparatus is substantially vertically positioned in a mixing vessel with the vanes extending over and spaced not more than 0.05 times the diameter of their sweep from proximately located plural inlets communicating with the bottom of the mixing vessel. Means are provided for transferring liquid from the mixing vessel to a settling vessel provided with a baffle to minimize turbulance produced by the liquid transfer.

Description

United States Patent Primary ExaminerRobert W. Jenkins Attorneys-Richard W. Sternberg, Roger R. Jones and Thomas N. Wallin ABSTRACT: A variable ratio impeller apparatus in which vanes extend through perforations in a baffle which is movable to vary the proportion of the vanes extending on either side of the baffle permits adjusting the ratio of mixing action to pumping action produced by the impeller. In a mixer-settler liquid-liquid contact apparatus, the impeller apparatus is substantially vertically positioned in a mixing vessel with the vanes extending over and spaced not more than 0.05 times the diameter of their sweep from proximately located plural inlets communicating with the bottom of the mixing vessel. Means are provided for transferring liquid from the mixing vessel to a settling vessel provided with a baffle to minimize turbulance produced by the liquid transfer.
[72] inventors Walter M. Davis Beverly, Mass.; Edwin A. Matzner, St. Louis, Mo. [21] Appl. No. 752,231 [22] Filed Aug. 13, 1968 [45] Patented Feb. 2, 1971 [73] Assignee Monsanto Company St. Louis, Mo. a corporation of Delaware [54] IMPELLER AND MIXER-SETTLER APPARATUS 4 Claims, 3 Drawing Figs.
[52] US. Cl 259/23 [51] lnt.Cl B01f 7/16 [50] Field of Search 259/66, 23, 8, 7, 2, 24, 43,44, 67; 230/1 14; 103/97 [56] References Cited UNITED STATES PATENTS 2,845,936 8/1958 Boynton 259/66 g I 2' i IMPELLER AND MIXER-SETTLER APPARATUS BACKGROUND OF THE INVENTION This invention relates to an impeller apparatus which simultaneously provides pumping and mixing action and is adjustable so as to vary the ratio of mixing action to pumping action. The invention further relates to a liquid-liquid contact apparatus of the mixer-settler type. Impellers which simultaneously provide both pumping and mixing action are known to the art. In many operations in which such impellers are utilized, the ratio of pumping to mixing action is critical. For example, in solvent extraction procedures and washing operations wherein substantially immiscible liquids are pumped into a mixer, mixed and thereafter separated, the rate at which the liquids are pumped into the mixing chamber relative to the mixing action is often critical. If the pumping action is disproportionately greater than the mixing action, the liquids will be ineffectively mixed so as to render the extraction or washing operation inefficient. Conversely, if the liquids are overly mixed, power is wasted in the mixing operation and in some cases the liquids may emulsify so as to defy separation.
Since, in hitherto known impellers, the ratio of pumping to mixing action is fixed, such impeller must be designed and fabricated for the specific conditions of intended use. Changes in process conditions, such as desired flow rate, liquids, or liquid ratios, necessitate fabrication of specially designed impellers suited for use in the changed process.
SUMMARY OF THE INVENTION It is an object of this invention to provide a variable ratio impeller apparatus having both pumping and mixing action wherein the ratio of the pumping action to the mixing action is readily adjustable.
A further object of the invention is to provide a mixer-settler apparatus which facilitates proper mixing of substantially immiscible liquid components followed by the rapid separation of these components.
Basically, these and other objects are accomplished, in accordance with this invention, by an impeller having vanes extending through a perforated baffle which is adjustable to vary the portion of the vanes extending on either side of the baffle and by a mixer-settler apparatus utilizing such impeller.
The invention will be better understood by reference to the drawings and the description of the preferred embodiments.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective front elevation of an impeller apparatus illustrating one embodiment of this invention. FIG. 2 is a perspective front elevation, partially in section, of an impeller apparatus illustrating another embodiment of this invention. FIG. 3 is a front elevation in cross section of a mixersettler apparatus of this invention.
[DESCRIPT ION OF THE PREFERRED EMBODIMENTS One embodiment of the impeller apparatus of this invention is described by reference to FIG. 1. As shown, vanes are attached to a shaft 11 which is provided with means (not shown) for effecting rotation thereof about a vertical axis. The vanes extend through perforations in a baffle 12. Means for adjusting the relative positions of the baffle l2 and vanes 10 with respect to each other are provided by rods 13 connecting the baffle to collar 14. The baffle can be adjusted to vary the portion of the vanes extending on either side thereof and the set screw 15 provides means for Securing the baffle in fixed position relative to the vanes. Pumping action is increased and mixing action decreased by moving the baffle in the direction shown by the arrow. Movement of the battle in the opposite direction increases mixing action and decreases pumping action. Both pumping and mixing action can be increased by increasing the speed of rotation of the impeller or decreased by decreasing the speed of rotation. Thus, by varying the speed of rotation and the position of the baffle, the desired degree of pumping and mixing action is readily obtained.
If it is inconvenient or uneconomical to provide means for varying rate of impeller rotation, an embodiment such as shown in FIG. 2 may be advantageously employed. As shown, a second baffle 12a is provided which is adjustable independently of baffle 12. Baffle 12a is provided with a leaf 16 fitted with a set screw 15a which can be tightened to secure baffle 12a in fixed position. Since the area of the vanes between the baffles provides no pumping and relatively little mixing action, this embodiment of the invention permits independent adjustment of pumping and mixing action.
The mixer-settler apparatus of this invention will be understood by reference to FIG. 3. As shown, this apparatus comprises a mixing vessel 17 and a settling vessel 18. Means for transferring fluid from the mixing vessel to the settling vessel is provided by the lowered lip 19 of the common wall between these vessels.
Proximately located inlets in the form of concentric conduits 20 and 21 communicate with the bottom of mixing vessel 17. An impeller apparatus as previously described is substantially vertically positioned in mixing vessel 17 so that the vanes 10 extend over the inlets 20 and 21. The vanes are spaced from the inlets by a distance less than 0.05 times the diameter of the sweep of the vanes. If spaced a greater distance, pumping action is very inefficient. In operation, liquids are pumped from the inlets, mixed, and transferred by the pumping action of the impeller from mixing vessel 17 over lowered lip 19 to the settling vessel 18. A baffle 22 is disposed in the settling vessel to minimize the turbulance produced in the settling vessel by the transfer of liquid thereto. The optimum baffle position for use with various flow conditions can be determined from well-understood hydrodynamic principles and routine tests. Preferably, the baffle also defines a channel for introduction of liquid into the settling vessel at an optimum level.
It is known that separation of admixed immiscible liquids is sometimes facilitated by maintaining constant temperatures to minimize interference with settling caused by thermal circulation. Therefore, it is often desirable to maintain adiabatic conditions by surrounding a portion of the mixer settler apparatus with insulation means 23 in which heating means such as resistance heating wire 24 are'disposed. The settling vessel is provided with means (not shown) for exiting or withdrawing either or both fractions of the separated liquids.
Although this invention has been described by reference to specific embodiments, various modifications and functional equivalents within the scope of the appended claims will be apparent to those skilled in the art.
We claim: 1
l. A mixer-settler apparatus comprising in combination:
a. a mixing vessel;
b. a settling vessel;
c. means for transfer of fluid from said mixing vessel to said settling vessel;
d. at least 2 proximately located inlets communicating with the bottom of said mixing vessel;
e. a variable ratio impeller apparatus comprising a perforated baffle, vanes extending through the perforations in said baffle, means for adjusting the relative position of said baffle and said vanes with respect to each other to vary the portion of said extending on either side of said baffie, and means for securing said baffle and said vanes in fixed position relative to each other, said apparatus being substantially vertically positioned in said mixing vessel, the vanes of said impeller apparatus extending over said inlets and being spaced therefrom by a distance less than 0.05 times the diameter of the sweep of said vanes;
f. a baffle disposed in said settling vessel to minimize the tur-, bulence produced in said settling vessel by transfer thereto of fluid from said mixing vessel; and
g. means for withdrawing liquid from said settling vessel.
2. The apparatus of claim 1 wherein said inlets are concentric conduits.
3. The apparatus of claim 2 wherein said baffle in said settling vessel defines a channel therein.
4. The apparatus of claim I further comprising insulation .means having heating means disposed therein at least partially surrounding said vessels.

Claims (4)

1. A mixer-settler apparatus comprising in combination: a. a mixing vessel; b. a settling vessel; c. means for transfer of fluid from said mixing vessel to said settling vessel; d. at least 2 proximately located inlets communicating with the bottom of said mixing vessel; e. a variable ratio impeller apparatus comprising a perforated baffle, vanes extending through the perforations in said baffle, means for adjusting the relative position of said baffle and said vanes with respect to each other to vary the portion of said extending on either side of said baffle, and means for securing said baffle and said vanes in fixed position relative to each other, said apparatus being substantially vertically positioned in said mixing vessel, the vanes of said impeller apparatus extending over said inlets and being spaced therefrom by a distance less than 0.05 times the diameter of the sweep of said vanes; f. a baffle disposed in said settling vessel to minimize the turbulence produced in said settling vessel by transfer thereto of fluid from said mixing vessel; and g. means for withdrawing liquid from said settling vessel.
2. The apparatus of claim 1 wherein said inlets are concentric conduits.
3. The apparatus of claim 2 wherein said baffle in said settling vessel defines a channel therein.
4. The apparatus of claim 1 further comprising insulation means having heating means disposed therein at least partially surrounding said vessels.
US752231A 1968-08-13 1968-08-13 Impeller and mixer-settler apparatus Expired - Lifetime US3559959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75223168A 1968-08-13 1968-08-13

Publications (1)

Publication Number Publication Date
US3559959A true US3559959A (en) 1971-02-02

Family

ID=25025441

Family Applications (1)

Application Number Title Priority Date Filing Date
US752231A Expired - Lifetime US3559959A (en) 1968-08-13 1968-08-13 Impeller and mixer-settler apparatus

Country Status (1)

Country Link
US (1) US3559959A (en)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685806A (en) * 1968-10-07 1972-08-22 Fritz Schoppe Method of stirring materials and apparatus therefor
US4217145A (en) * 1977-01-12 1980-08-12 Gaddis Preston G Process for admixing polymer emulsions with water to produce highly viscous liquids
US4332483A (en) * 1979-09-17 1982-06-01 Hope Henry F Mixing apparatus
US4522502A (en) * 1982-10-22 1985-06-11 Stran Corporation Mixing and feeding apparatus
US4884893A (en) * 1987-07-10 1989-12-05 Gaston County Dyeing Machine Co. Method and apparatus for generating and dispersing immiscible liquid particles in a carrier liquid and dispensing said carrier liquid
US4961562A (en) * 1988-11-16 1990-10-09 Donnally Robert B Apparatus for engaging beams
US5061456A (en) * 1987-08-25 1991-10-29 Stranco, Inc. Polymer activation apparatus
US5135968A (en) * 1990-10-10 1992-08-04 Stranco, Ltd. Methods and apparatus for treating wastewater
US5164429A (en) * 1987-08-25 1992-11-17 Stranco, Inc. Polymer activation apparatus
US5252635A (en) * 1987-08-25 1993-10-12 Stranco, Inc. Polymer activation method using two separate mixing zones
US5316031A (en) * 1987-08-25 1994-05-31 Brazelton Carl L Valve with independent control of discharge through plurality of orifices
US5338779A (en) * 1992-09-18 1994-08-16 Stranco, Inc Dry polymer activation apparatus and method
US5470150A (en) * 1990-06-20 1995-11-28 Pardikes; Dennis G. System for mixing and activating polymers
US6409926B1 (en) 1999-03-02 2002-06-25 United States Filter Corporation Air and water purification using continuous breakpoint halogenation and peroxygenation
US6419817B1 (en) 2000-06-22 2002-07-16 United States Filter Corporation Dynamic optimization of chemical additives in a water treatment system
US6423234B1 (en) 1999-03-02 2002-07-23 United States Filter Corporation Air and water purification using continuous breakpoint halogenation
US20030038277A1 (en) * 2001-08-09 2003-02-27 Roy Martin Calcium hypochlorite of reduced reactivity
US20030160004A1 (en) * 2002-02-26 2003-08-28 Roy Martin Free radical generator and method
US20030160005A1 (en) * 2002-02-26 2003-08-28 Roy Martin Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals
US6620315B2 (en) 2001-02-09 2003-09-16 United States Filter Corporation System for optimized control of multiple oxidizer feedstreams
US6645400B2 (en) 2000-06-22 2003-11-11 United States Filter Corporation Corrosion control utilizing a hydrogen peroxide donor
US6716359B1 (en) 2000-08-29 2004-04-06 United States Filter Corporation Enhanced time-based proportional control
US20080245738A1 (en) * 2007-04-03 2008-10-09 Siemens Water Technologies Corp. Method and system for providing ultrapure water
US20110024365A1 (en) * 2009-07-30 2011-02-03 Zhee Min Jimmy Yong Baffle plates for an ultraviolet reactor
US20110180485A1 (en) * 2006-06-06 2011-07-28 Fluid Lines Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
US20110210266A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Method of irradiating a liquid
US20110210077A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Method and system for providing ultrapure water
US20110209530A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Method for measuring a concentration of a compound in a liquid stream
US20110210048A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. System for controlling introduction of a reducing agent to a liquid stream
US20110210267A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Actinic radiation reactor
US8877067B2 (en) 2011-05-26 2014-11-04 Evoqua Water Technologies Llc Method and arrangement for a water treatment
US9725343B2 (en) 2007-04-03 2017-08-08 Evoqua Water Technologies Llc System and method for measuring and treating a liquid stream
US10343939B2 (en) 2006-06-06 2019-07-09 Evoqua Water Technologies Llc Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
US10494281B2 (en) 2015-01-21 2019-12-03 Evoqua Water Technologies Llc Advanced oxidation process for ex-situ groundwater remediation
CN112090304A (en) * 2019-06-18 2020-12-18 精工爱普生株式会社 Stirring device
US11161762B2 (en) 2015-01-21 2021-11-02 Evoqua Water Technologies Llc Advanced oxidation process for ex-situ groundwater remediation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR657574A (en) * 1927-07-16 1929-05-24 Centrifugal fan with movable flange
FR710215A (en) * 1930-12-04 1931-08-20 Variable flow turbine for centrifugal fan
US2845936A (en) * 1955-05-09 1958-08-05 Hercules Powder Co Ltd Countercurrent contacting apparatus
CA738285A (en) * 1966-07-12 H. Dressler Jacques Process and apparatus for mixing liquids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA738285A (en) * 1966-07-12 H. Dressler Jacques Process and apparatus for mixing liquids
FR657574A (en) * 1927-07-16 1929-05-24 Centrifugal fan with movable flange
FR710215A (en) * 1930-12-04 1931-08-20 Variable flow turbine for centrifugal fan
US2845936A (en) * 1955-05-09 1958-08-05 Hercules Powder Co Ltd Countercurrent contacting apparatus

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685806A (en) * 1968-10-07 1972-08-22 Fritz Schoppe Method of stirring materials and apparatus therefor
US4217145A (en) * 1977-01-12 1980-08-12 Gaddis Preston G Process for admixing polymer emulsions with water to produce highly viscous liquids
US4332483A (en) * 1979-09-17 1982-06-01 Hope Henry F Mixing apparatus
US4522502A (en) * 1982-10-22 1985-06-11 Stran Corporation Mixing and feeding apparatus
US4884893A (en) * 1987-07-10 1989-12-05 Gaston County Dyeing Machine Co. Method and apparatus for generating and dispersing immiscible liquid particles in a carrier liquid and dispensing said carrier liquid
US5316031A (en) * 1987-08-25 1994-05-31 Brazelton Carl L Valve with independent control of discharge through plurality of orifices
US5061456A (en) * 1987-08-25 1991-10-29 Stranco, Inc. Polymer activation apparatus
US5164429A (en) * 1987-08-25 1992-11-17 Stranco, Inc. Polymer activation apparatus
US5252635A (en) * 1987-08-25 1993-10-12 Stranco, Inc. Polymer activation method using two separate mixing zones
US5284627A (en) * 1987-08-25 1994-02-08 Stranco, Inc. Polymer activation apparatus
US5284626A (en) * 1987-08-25 1994-02-08 Stranco, Inc. Polymer activation apparatus
US4961562A (en) * 1988-11-16 1990-10-09 Donnally Robert B Apparatus for engaging beams
US5470150A (en) * 1990-06-20 1995-11-28 Pardikes; Dennis G. System for mixing and activating polymers
US5135968A (en) * 1990-10-10 1992-08-04 Stranco, Ltd. Methods and apparatus for treating wastewater
US5338779A (en) * 1992-09-18 1994-08-16 Stranco, Inc Dry polymer activation apparatus and method
US6409926B1 (en) 1999-03-02 2002-06-25 United States Filter Corporation Air and water purification using continuous breakpoint halogenation and peroxygenation
US6423234B1 (en) 1999-03-02 2002-07-23 United States Filter Corporation Air and water purification using continuous breakpoint halogenation
US6419817B1 (en) 2000-06-22 2002-07-16 United States Filter Corporation Dynamic optimization of chemical additives in a water treatment system
US6645400B2 (en) 2000-06-22 2003-11-11 United States Filter Corporation Corrosion control utilizing a hydrogen peroxide donor
US6716359B1 (en) 2000-08-29 2004-04-06 United States Filter Corporation Enhanced time-based proportional control
US6620315B2 (en) 2001-02-09 2003-09-16 United States Filter Corporation System for optimized control of multiple oxidizer feedstreams
US6623647B2 (en) 2001-02-09 2003-09-23 United States Filter Corporation Methods of optimized control of multiple oxidizer feedstreams
US6776926B2 (en) 2001-08-09 2004-08-17 United States Filter Corporation Calcium hypochlorite of reduced reactivity
US20030038277A1 (en) * 2001-08-09 2003-02-27 Roy Martin Calcium hypochlorite of reduced reactivity
US20040224088A1 (en) * 2001-08-09 2004-11-11 United States Filter Corporation Calcium hypochlorite of reduced reactivity
US6991735B2 (en) 2002-02-26 2006-01-31 Usfilter Corporation Free radical generator and method
US20030160005A1 (en) * 2002-02-26 2003-08-28 Roy Martin Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals
US20050109709A1 (en) * 2002-02-26 2005-05-26 Usfilter Corporation Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals
US20030160004A1 (en) * 2002-02-26 2003-08-28 Roy Martin Free radical generator and method
US7108781B2 (en) 2002-02-26 2006-09-19 Usfilter Corporation Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals
US7285223B2 (en) 2002-02-26 2007-10-23 Siemens Water Technologies Holding Corp. Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals
US8652336B2 (en) 2006-06-06 2014-02-18 Siemens Water Technologies Llc Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
US10343939B2 (en) 2006-06-06 2019-07-09 Evoqua Water Technologies Llc Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
US20110180485A1 (en) * 2006-06-06 2011-07-28 Fluid Lines Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
US10550020B2 (en) 2006-06-06 2020-02-04 Evoqua Water Technologies Llc Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
US8961798B2 (en) 2007-04-03 2015-02-24 Evoqua Water Technologies Llc Method for measuring a concentration of a compound in a liquid stream
US9365436B2 (en) 2007-04-03 2016-06-14 Evoqua Water Technologies Llc Method of irradiating a liquid
US20110210048A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. System for controlling introduction of a reducing agent to a liquid stream
US20110210267A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Actinic radiation reactor
US20110210266A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Method of irradiating a liquid
US20080245738A1 (en) * 2007-04-03 2008-10-09 Siemens Water Technologies Corp. Method and system for providing ultrapure water
US8741155B2 (en) 2007-04-03 2014-06-03 Evoqua Water Technologies Llc Method and system for providing ultrapure water
US8753522B2 (en) 2007-04-03 2014-06-17 Evoqua Water Technologies Llc System for controlling introduction of a reducing agent to a liquid stream
US20110210077A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Method and system for providing ultrapure water
US9764968B2 (en) 2007-04-03 2017-09-19 Evoqua Water Technologies Llc Method and system for providing ultrapure water
US9365435B2 (en) 2007-04-03 2016-06-14 Evoqua Water Technologies Llc Actinic radiation reactor
US20110209530A1 (en) * 2007-04-03 2011-09-01 Siemens Water Technologies Corp. Method for measuring a concentration of a compound in a liquid stream
US9725343B2 (en) 2007-04-03 2017-08-08 Evoqua Water Technologies Llc System and method for measuring and treating a liquid stream
US20110024365A1 (en) * 2009-07-30 2011-02-03 Zhee Min Jimmy Yong Baffle plates for an ultraviolet reactor
US8591730B2 (en) 2009-07-30 2013-11-26 Siemens Pte. Ltd. Baffle plates for an ultraviolet reactor
US8877067B2 (en) 2011-05-26 2014-11-04 Evoqua Water Technologies Llc Method and arrangement for a water treatment
US10494281B2 (en) 2015-01-21 2019-12-03 Evoqua Water Technologies Llc Advanced oxidation process for ex-situ groundwater remediation
US11161762B2 (en) 2015-01-21 2021-11-02 Evoqua Water Technologies Llc Advanced oxidation process for ex-situ groundwater remediation
CN112090304A (en) * 2019-06-18 2020-12-18 精工爱普生株式会社 Stirring device
EP3753629A1 (en) * 2019-06-18 2020-12-23 Seiko Epson Corporation Stirring apparatus
US11291961B2 (en) 2019-06-18 2022-04-05 Seiko Epson Corporation Stirring apparatus

Similar Documents

Publication Publication Date Title
US3559959A (en) Impeller and mixer-settler apparatus
US3625834A (en) Method of mixing gaseous and liquid phases
US3334868A (en) Process for mixing and apparatus for practicing the process
US3638917A (en) Method and apparatus for continuously dispersing materials
US3352543A (en) Vertical mixer
US2801083A (en) Mixing device
US2875027A (en) Stirred reactor
US3675902A (en) Mixing of fluid materials
US3365176A (en) Agitator apparatus
US1255944A (en) Mixing and stirring device.
GB1221022A (en) Treatment of a liquid by means of a gaseous fluid
US2610836A (en) Rotating plate mixing device
US2703304A (en) Foamless stirring and/or homogenizing process and apparatus therefor
GB1117959A (en) A liquid-liquid contactor
US4231874A (en) Gyratory aerobic aeration treatment tank
HU194301B (en) Equipment for fermentation especially for higly viscosive aerobic mediums
US2342559A (en) Mixing device for water treating apparatus
US2102548A (en) Apparatus for treating hydrocarbon oils
US2791406A (en) Fluid agitating devices
US1976955A (en) Fluid treating apparatus
GB1399520A (en) Apparatus for aerating liquids
US2840355A (en) Mixing vessel
US2816744A (en) Jet impeller mixer
GB1089994A (en) Improvements in reaction vessels
GB1199169A (en) A Method and Means for Developing Flow in the Reaction Zone Between Two Fluids of Different Specific Gravity, in a Container