US3481546A - Atomizer wheel for simultaneously atomizing two components - Google Patents

Atomizer wheel for simultaneously atomizing two components Download PDF

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Publication number
US3481546A
US3481546A US686662A US3481546DA US3481546A US 3481546 A US3481546 A US 3481546A US 686662 A US686662 A US 686662A US 3481546D A US3481546D A US 3481546DA US 3481546 A US3481546 A US 3481546A
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United States
Prior art keywords
space
wheel
channels
components
spaces
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
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US686662A
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English (en)
Inventor
Kaj Nielsen
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.)
GEA Process Engineering AS
Original Assignee
Niro Atomizer AS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • B01D1/20—Sprayers
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING OR TREATMENT THEREOF
    • A23C1/00—Concentration, evaporation or drying
    • A23C1/04—Concentration, evaporation or drying by spraying into a gas stream
    • A23C1/045—Concentration, evaporation or drying by spraying into a gas stream by simultaneously or separately spraying of two different liquid products other than water or steam; by separate addition of additives other than milk products or lactose in the spray-dryer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S159/00—Concentrating evaporators
    • Y10S159/09—Two liquids dried simultaneously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S159/00—Concentrating evaporators
    • Y10S159/17—Two liquids

Definitions

  • An atomizer wheel for simultaneously atomizing two components comprises two separate axially displaced supply spaces from which ejection channels lead to the circumference of the wheel, all of these channels terminating separately in the same plane normal to the axis of revolution. These channels are regularly distributed around the circumference.
  • the invention relates to an atomizer wheel for simultaneously atomizing two components, the said wheel comprising two separate supply spaces from which ejection channels lead to the circumference of the wheel.
  • Such atomizer wheels are often used in processes in which two different liquids are atomized into the same chamber. This is for instance the case in certain methods for producing milk powder, where the milk is first separated into cream and skimmed milk, whereupon these components are after a suitable regulation of their hydrogen ion concentration atomized into the same drying chamber separately, by which means the particles of the individual components are during the drying combined into whole milk-powder.
  • Another known method makes use of such atomizer wheels in the production of powders from two components, one of which is in the form of a dry or almost dry, generally fine-grained powder, while the other is in the form of a liquid.
  • a dry product of sugar and milk where a fine sugar-powder is atomized in the drying chamber simultaneously with the atomization of a concentrate of milk.
  • the reintroduction of the fine powder which is carried along by the discharge air from the drying chamber and which, as a rule, cannot be mixed directly with the powder derived from the drying chamber without the latter powder acquiring undesirable propertiesfbut which by being atomized into the drying chamber simultaneously with the atomization of the liquid from which the powder is produced, can impart particularly satisfactory properties to the finished powder.
  • each of the two components is atomized at its individual level in the drying chamber, as the known atomizer wheels of this type may be regarded as being composed of two individual wheels placed one immediately on top of the other, so that the ejection channels from the two separate supply spaces are disposed at two diiferent levels.
  • this is achieved by the ejection channels from the two supply spaces terminating substantially in the same normal plane regularly distributed around the circumference of the wheel.
  • the particles of the two components will be ejected at substantially the same level in the chamber, so that they will be thoroughly mixed with each other before coming into contact with the drying air.
  • the ejection channels lie at the level of one space, and that the ejection channels in communication with the other space are separated from the former space by means of thin dividing walls and are in communication with the latter space by means of oblique bores in the horizontal wall.
  • the wheel becomes particularly simple to manufacture, in spite of the fact that the ejection channels from the two spaces disposed at diiferent levels are to lie at the same level.
  • the ejection channels are disposed at the level of the upper space in which one or more supply pipes have been inserted from above, preferably powder supply pipes, and that one or more supply pipes to the lower space have been carried from above down through the upper space and through an annular slot between the dividing wall of the two spaces and the hub of the wheel.
  • the lower space is provided with a central aperture facing downwards and that below the latter a central supply pipe is mounted, while to the upper space one or more supply pipes have been led from above.
  • the ejection channels are disposed at the level of the lower space.
  • the supply pipes to the latter are led up from below, it must necessarily be partially open at the bottom, and it is therefore significant that the discharge resistance from the space through the channels is as slight as possible and this is achieved due to the fact that the extra resistance which would be encountered, if the material were to first pass through oblique bores to be led up to the level of the other space, is avoided.
  • the central supply pipe is a powder supply pipe.
  • the liquid component which is to pass through the oblique bores and this entails far less risk of the latter becoming obstructed even if they are made rather narrow, than if the powder is led through them.
  • FIGURES l and 2 show an embodiment of the atomizer wheel accordinging to the invention viewed in axial section and in section on line IIII in FIG. 1 respectively, and
  • FIGURES 3 and 4 show another embodiment of the atomizer wheel according to the invention viewed in axial section and in section on line IVIV in FIG. 3.
  • the atomizer wheel shown in FIGURES l and 2 consists of a cylindrical, bowl-shaped part 1 with a hub 2 for securing the wheel on a shaft, not shown.
  • the side wall of the bowl-shaped part 1 is approximately at its middle provided with a turned flange 3, pointing inwards, to which an annular dividing wall 4 is secured, which divides the interior of the bowl-shaped part into two spaces, 5 and 6.
  • a number of ejection channels 7 and 8 have been provided so as to be regularly distributed around the circumference of the wheel, and these channels are closed in the upward direction by means of a cover ring 9.
  • the channels 7 and 8 are disposed at the same level as the space 6, i.e., the upper space of the two spaces 5 and 6, and the channels 7 are in open communication with the space 6, while the channels 8 are blocked from this space by means of a dividing wall 10.
  • the latter channels 8 on the other hand are in communication with the space 5 through bores 11 in the flange 3, which forms part of the dividing wall between the spaces 5 and 6.
  • the space 6 is bounded on the inside by a cylindrical member 12, which is mounted so as to be stationary coaxially with the atomizer wheel and projects downwards within the annular dividing wall 4.
  • a number of channels 13 have been designed, which terminate in the lower space 5 in the wheel and form supply pipes to this space.
  • a supply pipe 14 to the space 6 projects slightly down into the latter from above beside the cylindrical member 12.
  • one component is led through the channels 13 to the space 5 and the other component is led through the supply pipe 14 to the space 6.
  • the component led to the space 6 is ejected in an atomized state in the normal way from this space through the channels 7 due to the centrifugal force produced by the rotation of the wheel.
  • the component supplied to the space 5 is first due to the centrifugal force being forced up through bores 11 to the channels 8, from where it is ejected in an atomized state at the same level as the former component.
  • the two components are therefore mixed in the drying chamber in which the wheel is mounted, and the dry air led to this chamber will consequently not come into contact with one of the components before it has ben mixed with the other.
  • the two components may both be liquids, or one of them may be a completely or partially dry powder, preferably a fine-grained powder, e.g., the very fine powder that can be separated from the discharge air from the drying chamber.
  • the channels 13 and the supply pipe 14 must in the normal Way be dimensioned in conformity with the material forming each of the two components. If the occasion should arise, more than a Single supply pipe 14 to the upper space 6 may be used.
  • one component is in the form of powder, it will, in the embodiment shown, be expedient that it is this component that is supplied to the upper space 6, which is in direct communication with the ejection channels 7.
  • FIGURES 3 and 4 The embodiment shown in FIGURES 3 and 4 is shown considerably more diagrammatically than the one shown in FIGURES 1 and 2.
  • the wheel comprises two spaces, viz. the spaces 15 and 16 separated from each other by a dividing wall 17.
  • One component to be atomized is supplied to space 15 through supply pipes or supply channels, which may e.g., be designed like the channels 13 in FIGURES 1 and 2, but are only shown purely diagrammatically as a supply pipe 22 in FIG. 3.
  • the other component is supplied to the space 16 through a supply pipe 23, which is placed centrally below the space 16 and in the embodiment shown projects in through a central, circular opening 24 facing downwards in the lower wall of space 16, but the pipe 23 may, however, also terminate directly in this opening or slightly below same.
  • the two components is a substantially dry powder
  • the latter is preferably supplied to the space 16 through the pipe 23, while the other component is supplied to space 15 through pipe 22.
  • the form shown of the channels in the two embodi ments serves only as an example, as the form and dimensions of the ejection channels in each individual case must be chosen dependent on the given operational conditions in the same way as in the case of a conventional atomizer wheel.
  • the number of the channels is correspondingly determined separately for each space, but it is necessary to determine the proportion between the number of channels leading to one space and the number of channels leading to the other space in such a way that they can be distributed uniformly around the circumference of the wheel so that it can become symmetrical around its axis of rotation, there being, as will be known, due to the frequently very high speed of rotation, required a very accurate balancing of the wheel.
  • a rotatable atomizer wheel for simultaneously atomizing two substances, the said wheel comprising two separate axially displaced supply spaces respectively containing said substances from each of which spaces separate ejection channels lead to the circumference of the wheel, characterized in that the outlets of the ejection channels from the two supply spaces terminate separately substantially in the same plane normal to the axis of rotation regularly distributed around the circumference of the wheel.
  • BASCOMB 111., Primary Examiner I. SOFER, Assistant Examiner US. Cl. X.R.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Nozzles (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Special Spraying Apparatus (AREA)
US686662A 1966-12-02 1967-11-29 Atomizer wheel for simultaneously atomizing two components Expired - Lifetime US3481546A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK626066AA DK123549B (da) 1966-12-02 1966-12-02 Forstøverhjul til samtidig forstøvning af to komponenter.

Publications (1)

Publication Number Publication Date
US3481546A true US3481546A (en) 1969-12-02

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ID=8148355

Family Applications (1)

Application Number Title Priority Date Filing Date
US686662A Expired - Lifetime US3481546A (en) 1966-12-02 1967-11-29 Atomizer wheel for simultaneously atomizing two components

Country Status (8)

Country Link
US (1) US3481546A (enrdf_load_stackoverflow)
JP (1) JPS4833045B1 (enrdf_load_stackoverflow)
BE (1) BE707353A (enrdf_load_stackoverflow)
DE (1) DE1729269A1 (enrdf_load_stackoverflow)
DK (1) DK123549B (enrdf_load_stackoverflow)
GB (1) GB1202266A (enrdf_load_stackoverflow)
NL (1) NL6716410A (enrdf_load_stackoverflow)
SE (1) SE329381B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162039A (en) * 1976-07-05 1979-07-24 Aktiebolaget Skf Feeding and mixing nozzle
US4511084A (en) * 1983-05-12 1985-04-16 Won Vann Y Top feeding liquid atomizer
US5156336A (en) * 1989-12-27 1992-10-20 Xerox Corporation Multiple fluid injection nozzle array for rotary atomizer
US8984765B2 (en) 2011-08-01 2015-03-24 Wacker Chemie Ag Process for producing dispersion powders

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4024805C1 (enrdf_load_stackoverflow) * 1990-08-04 1992-02-06 Metallgesellschaft Ag, 6000 Frankfurt, De

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE703282C (de) * 1939-03-10 1941-03-05 Bader & Halbig Mischkreisel
GB666341A (en) * 1948-07-10 1952-02-13 Hauser & Cie Ag Neumuehle Toes Improved centrifugal liquid-atomiser
US3144209A (en) * 1961-10-20 1964-08-11 Westinghouse Electric Corp Rotatable spray apparatus
FR1369937A (fr) * 1963-09-27 1964-08-14 Firestone Prod Tête de buse pour la pulvérisation simultanée de deux substances
US3147957A (en) * 1960-05-31 1964-09-08 W J Cooper Liquid mixing device
US3269660A (en) * 1965-10-12 1966-08-30 Stratford Eng Corp Mixing atomizing rotor
US3355106A (en) * 1964-04-30 1967-11-28 Stratford Eng Corp Mixing atomizing rotor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE703282C (de) * 1939-03-10 1941-03-05 Bader & Halbig Mischkreisel
GB666341A (en) * 1948-07-10 1952-02-13 Hauser & Cie Ag Neumuehle Toes Improved centrifugal liquid-atomiser
US3147957A (en) * 1960-05-31 1964-09-08 W J Cooper Liquid mixing device
US3144209A (en) * 1961-10-20 1964-08-11 Westinghouse Electric Corp Rotatable spray apparatus
FR1369937A (fr) * 1963-09-27 1964-08-14 Firestone Prod Tête de buse pour la pulvérisation simultanée de deux substances
US3355106A (en) * 1964-04-30 1967-11-28 Stratford Eng Corp Mixing atomizing rotor
US3269660A (en) * 1965-10-12 1966-08-30 Stratford Eng Corp Mixing atomizing rotor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162039A (en) * 1976-07-05 1979-07-24 Aktiebolaget Skf Feeding and mixing nozzle
US4511084A (en) * 1983-05-12 1985-04-16 Won Vann Y Top feeding liquid atomizer
US5156336A (en) * 1989-12-27 1992-10-20 Xerox Corporation Multiple fluid injection nozzle array for rotary atomizer
US8984765B2 (en) 2011-08-01 2015-03-24 Wacker Chemie Ag Process for producing dispersion powders

Also Published As

Publication number Publication date
BE707353A (enrdf_load_stackoverflow) 1968-04-01
JPS4833045B1 (enrdf_load_stackoverflow) 1973-10-11
SE329381B (enrdf_load_stackoverflow) 1970-10-12
DK123549B (da) 1972-07-03
GB1202266A (en) 1970-08-12
DE1729269A1 (de) 1971-06-09
NL6716410A (enrdf_load_stackoverflow) 1968-06-04

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