US3112239A - Method and apparatus for preparing very soluble fine powders from liquids - Google Patents

Method and apparatus for preparing very soluble fine powders from liquids Download PDF

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Publication number
US3112239A
US3112239A US24821A US2482160A US3112239A US 3112239 A US3112239 A US 3112239A US 24821 A US24821 A US 24821A US 2482160 A US2482160 A US 2482160A US 3112239 A US3112239 A US 3112239A
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United States
Prior art keywords
tower
sheet
liquid mixture
liquid
particles
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Expired - Lifetime
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US24821A
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English (en)
Inventor
Andermatt Carl
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Alfa Laval SA
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Individual
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Publication of US3112239A publication Critical patent/US3112239A/en
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    • 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 THEREOF
    • A23C1/00—Concentration, evaporation or drying
    • A23C1/04—Concentration, evaporation or drying by spraying into a gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • B01D1/18—Evaporating by spraying to obtain dry solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles

Definitions

  • the powder obtained with this known method consists of considerable coarser particles and dissolves much better in the liquid than that obtained through the method wherein the liquid is projected in jet form from fixed nozzles at a more or less high pressure.
  • the finest particles are collected in the lower halfportion of the tower by means of a duct connected thereto, these particles being submitted to the action of a cyclone extractor separating from the outflowing gas stream the fine solid particles, and reintroduced with one portion of this gas without introducing ambient air from the top of the tower and on said centrifugal atomizer.
  • the centrifugal atomizer comprises two superposed discs, the upper disc acting as a fan on which the fine re-cycled powder is poured, whereas the lower one is used for atomizing the liquid.
  • the installation for carrying out this method comprises an atomizing drying tower incorporating a device for separating the coarse-grained powder from the fine powder, a duct connecting the zone where the coarsegraincd powder is separated from the fine powder to the top of the tower, a cyclone extractor for separating the outcoming gas from the fine powder and a fan mounted with said cyclone extractor in this duct, and a centrifugal atomizer having two discs lying in two spaced horizontal planes mounted in the upper portion of the tower below the inlet end of said duct.
  • FIGURE 1 is a diagrammatical axial section of the apparatus.
  • FIGURE 2 is another axial section showing on a larger scale details of the upper portion of the tower.
  • FIGURE 3 shows on a still larger scale and also in axial section the rotary centrifugal two-stage disc
  • FIGURES 4 and 5 are horizontal sections taken along the lines lVlV and VV of FIG. 3 respectively.
  • the tower l illustrated in the drawing comprises a funnel-shaped or conical lower portion 2 provided with a discharge duct 3 through which the coarse-grained product is evacuated.
  • a motor 4 coaxial with the tower and adapted to drive the centrifugal atomizer 5 at a relatively high speed, said centrifugal atomizer having two discs lying in two spaced horizontal planes.
  • the liquid is fed through a pipe 6 to the annular cavity 7 merging into a lower annular space 8 of the lower disc of the centrifugal atomizer 5, the lateral wall of this disc being perforated and provided with a number of radial nozzles 9.
  • a duct it) draws from the lower portion of the tower the finest particles by means of an exhauster or suction fan 12; in the cyclone 11 these particles are separated from the outflowiug gas stream and subsequently recycled by the fan 22 together with a moderate quantity of gas through the pipe 13 leading to the annular hopper id from which they flow on the disc of the upper plane 15 of the centrifugal atomizer 5; means for introducing steam or mist are provided in the form of a nozzle 23 mounted in the pipe 13.
  • This disc of the upper plane is provided with a number of orifices 16 inclined to the radius; by virtue of this inclination this upper disc acts as a fan impeller for drawing the particles from the discharge hopper 14 and projecting them in the form of a horizontal sheet into t-e tower.
  • a heated gas stream for example at a temperature of from 150 to 180 C., is fed through the duct 17 surrounding with its lower frusto-conical box portion the atomizer 5 so that, in the vicinity of this disc, the sheet of fine particles is stirred together with the liquid sheet; in order to facilitate and extend the contact between the particles of these two sheets the stream of hot gas is preferably inclined by means of battle plates 13; preferably, jackets l9 and 2t in which a cooling fluid is circulated are provided to prevent any abnormal or overheating of the upper central zone of the tower wherein the atmosphere is constantly kept for example at a temperature of from to C.
  • This method is applicable to the preparation not only of powders of any description but also of a milky powder as well as powders obtained by mixing milk with other products.
  • a method of treating a liquid mixture containing solid matter dissolved or suspended therein in order to recover the solid matter in divided form, very soluble in a liquid consisting in projecting this liquid mixture at very high speed with the assistance of centrifugal force and in the form of a thin horizontal sheet in the upper portion of a hot-atmosphere drying tower, and to collect the powdered product at the bottom of said tower, according to which the finest particles of the powdered product are extracted by suction in said tower below the horizontal sheet of liquid mixture and are projected at very high speed with the assistance of centrifugal force and in the form of a thin horizontal sheet at a level higher than that of said sheet of liquid mixture and a gas is blown through these sheets in order to blow the sheet of the finest particles of the powdered product against the sheet of liquid mixture.
  • An apparatus for preparing a powder very soluble in liquids from a liquid containing solid substances suspended or dissolved therein which comprises a tower,
  • centrifugal atomizer having two discs lying in two spaced horizontal planes in the upper portion of said tower, means for rotatably driving said centrifugal atomizer at a relatively high speed, an inlet for the liquid and a duct for delivering same to the disc of the lower plane of the centrifugal atomizer, means for blowing a hot gas into said tower in a downward inclined direction, and above said centrifugal atomizer, a discharge orifice at the lower portion of said tower for discharging the soluble powdered finished product thus produced, and means for withdrawing from the central part of the tower the finest particles thus produced and delivering them to the disc of the upper plane of said atomizer.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
US24821A 1959-05-02 1960-04-26 Method and apparatus for preparing very soluble fine powders from liquids Expired - Lifetime US3112239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7283759A CH368423A (de) 1959-05-02 1959-05-02 Verfahren zur Herstellung eines in einer Flüssigkeit löslichen oder suspendierbaren Pulvers und Vorrichtung zur Durchführung dieses Verfahrens

Publications (1)

Publication Number Publication Date
US3112239A true US3112239A (en) 1963-11-26

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Family Applications (1)

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US24821A Expired - Lifetime US3112239A (en) 1959-05-02 1960-04-26 Method and apparatus for preparing very soluble fine powders from liquids

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US (1) US3112239A (US07816562-20101019-C00012.png)
BE (1) BE590150A (US07816562-20101019-C00012.png)
CH (1) CH368423A (US07816562-20101019-C00012.png)
DE (1) DE1186802B (US07816562-20101019-C00012.png)
ES (1) ES257898A1 (US07816562-20101019-C00012.png)
FR (1) FR1255231A (US07816562-20101019-C00012.png)
GB (1) GB897468A (US07816562-20101019-C00012.png)
LU (1) LU38563A1 (US07816562-20101019-C00012.png)
NL (2) NL124102C (US07816562-20101019-C00012.png)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3233655A (en) * 1964-05-07 1966-02-08 Stratford Eng Corp Liquid atomization apparatus
US3236285A (en) * 1962-07-06 1966-02-22 Micro Biolog Ltd Spray drying of liquids
US3261670A (en) * 1965-04-21 1966-07-19 Chicago Bridge & Iron Co Conispherical vessel for crystallization
US3477874A (en) * 1964-04-17 1969-11-11 Kroyer K K K Process for preparing a dry free-flowing glucose product from a solution thereof
US3499476A (en) * 1967-04-29 1970-03-10 Knapsack Ag Spray drying of liquids to form particulate solids
US3592253A (en) * 1968-06-13 1971-07-13 Carnation Co Concentrating process and apparatus
US3607087A (en) * 1969-10-15 1971-09-21 Stratford Eng Corp Gas-liquid chemical reaction apparatus
US3719168A (en) * 1971-03-22 1973-03-06 Kadale Equip Co System for applying uniform layer of a flowable material to a substrate
US4082221A (en) * 1974-08-28 1978-04-04 Stork Amsterdam B.V. Rotatable atomizer for spraying a liquid
US4226603A (en) * 1978-08-17 1980-10-07 A/S Niro Atomizer Gas distribution device for the supply of a processing gas with adjustable flow direction to an atomizing chamber
US4227896A (en) * 1978-08-17 1980-10-14 A/S Niro Atomizer Gas distribution device for the supply of a processing gas to an atomizing chamber
US4655941A (en) * 1984-02-13 1987-04-07 Tomita Pharmaceutical Corp., Ltd. Method of preparing mixed electrolyte powder for bicarbonate dialysis and powder mixture formed
DK153105B (da) * 1974-11-18 1988-06-13 Francesco Saverio Mar Gastaldi Forstoevningstoerreanlaeg og fremgangsmaade til forstoevningstoerring
WO1991004776A1 (en) * 1989-09-26 1991-04-18 Niro A/S Gas distributor and heater for spray drying
CN106607197A (zh) * 2015-10-22 2017-05-03 中国石油化工股份有限公司 离心式雾化喷嘴和喷雾干燥机
CN106606994A (zh) * 2015-10-22 2017-05-03 中国石油化工股份有限公司 用于喷雾干燥机的喷嘴及喷雾干燥机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194540A (en) * 1961-07-28 1965-07-13 Liberty Nat Bank And Trust Com Homogenizing apparatus
SE364170B (US07816562-20101019-C00012.png) * 1969-02-01 1974-02-18 Morinaga Milk Industry Co Ltd
GB1373167A (en) * 1972-01-26 1974-11-06 Ici Ltd Manufacture of dyestuff powder
DK154038C (da) * 1984-02-28 1989-02-13 Anhydro As Gasfordelingsanordning til tilfoersel af en behandlingsgas til et forstoevningskammer

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1157935A (en) * 1915-06-14 1915-10-26 Chester Earl Gray Method of and apparatus for desiccating liquid substances.
US1823844A (en) * 1928-04-28 1931-09-15 Champlain L Riley Means for nebulizing fluids
DE695266C (de) * 1937-12-30 1940-08-21 Metallgesellschaft Akt Ges Verfahren zum Eindampfen oder Eindicken von Loesungen o. dgl.
GB530613A (en) * 1938-06-28 1940-12-16 Oskar Zahn Improvements in and relating to apparatus for evaporating liquids
DE748698C (de) * 1938-06-28 1944-11-08 Zahn & Co Anlage zur Zerstaeubungstrocknung von Fluessigkeiten, Suspensionen u. dgl.
US2559989A (en) * 1941-10-09 1951-07-10 Nyrop Johan Ernst Spray drier
US2561394A (en) * 1946-03-16 1951-07-24 Donald E Marshall Method of coating particulate materials
US2584973A (en) * 1947-04-10 1952-02-12 Luwa S A Cooling and sealing means for disk atomizer shafts
CA481786A (en) * 1952-03-18 Ernst Nyrop John Liquid atomizer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880122C (de) * 1953-04-30 Aktieselskabet Niro Atomizer, Hellerup (Dänemark) Flüssigkeitszerstäuber
US2575119A (en) * 1949-08-22 1951-11-13 Western Condensing Co Spray drying equipment and method
CH336319A (de) * 1955-01-07 1959-02-15 Karlsruhe Augsburg Iweka Verfahren und Vorrichtung zur Gewinnung von trockenem Grobpulver aus einer Flüssigkeit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA481786A (en) * 1952-03-18 Ernst Nyrop John Liquid atomizer
US1157935A (en) * 1915-06-14 1915-10-26 Chester Earl Gray Method of and apparatus for desiccating liquid substances.
US1823844A (en) * 1928-04-28 1931-09-15 Champlain L Riley Means for nebulizing fluids
DE695266C (de) * 1937-12-30 1940-08-21 Metallgesellschaft Akt Ges Verfahren zum Eindampfen oder Eindicken von Loesungen o. dgl.
GB530613A (en) * 1938-06-28 1940-12-16 Oskar Zahn Improvements in and relating to apparatus for evaporating liquids
DE748698C (de) * 1938-06-28 1944-11-08 Zahn & Co Anlage zur Zerstaeubungstrocknung von Fluessigkeiten, Suspensionen u. dgl.
US2559989A (en) * 1941-10-09 1951-07-10 Nyrop Johan Ernst Spray drier
US2561394A (en) * 1946-03-16 1951-07-24 Donald E Marshall Method of coating particulate materials
US2584973A (en) * 1947-04-10 1952-02-12 Luwa S A Cooling and sealing means for disk atomizer shafts

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3236285A (en) * 1962-07-06 1966-02-22 Micro Biolog Ltd Spray drying of liquids
US3477874A (en) * 1964-04-17 1969-11-11 Kroyer K K K Process for preparing a dry free-flowing glucose product from a solution thereof
US3233655A (en) * 1964-05-07 1966-02-08 Stratford Eng Corp Liquid atomization apparatus
US3261670A (en) * 1965-04-21 1966-07-19 Chicago Bridge & Iron Co Conispherical vessel for crystallization
US3499476A (en) * 1967-04-29 1970-03-10 Knapsack Ag Spray drying of liquids to form particulate solids
US3592253A (en) * 1968-06-13 1971-07-13 Carnation Co Concentrating process and apparatus
US3607087A (en) * 1969-10-15 1971-09-21 Stratford Eng Corp Gas-liquid chemical reaction apparatus
US3719168A (en) * 1971-03-22 1973-03-06 Kadale Equip Co System for applying uniform layer of a flowable material to a substrate
US4082221A (en) * 1974-08-28 1978-04-04 Stork Amsterdam B.V. Rotatable atomizer for spraying a liquid
DK153105B (da) * 1974-11-18 1988-06-13 Francesco Saverio Mar Gastaldi Forstoevningstoerreanlaeg og fremgangsmaade til forstoevningstoerring
US4226603A (en) * 1978-08-17 1980-10-07 A/S Niro Atomizer Gas distribution device for the supply of a processing gas with adjustable flow direction to an atomizing chamber
US4227896A (en) * 1978-08-17 1980-10-14 A/S Niro Atomizer Gas distribution device for the supply of a processing gas to an atomizing chamber
US4655941A (en) * 1984-02-13 1987-04-07 Tomita Pharmaceutical Corp., Ltd. Method of preparing mixed electrolyte powder for bicarbonate dialysis and powder mixture formed
WO1991004776A1 (en) * 1989-09-26 1991-04-18 Niro A/S Gas distributor and heater for spray drying
CN106607197A (zh) * 2015-10-22 2017-05-03 中国石油化工股份有限公司 离心式雾化喷嘴和喷雾干燥机
CN106606994A (zh) * 2015-10-22 2017-05-03 中国石油化工股份有限公司 用于喷雾干燥机的喷嘴及喷雾干燥机

Also Published As

Publication number Publication date
LU38563A1 (US07816562-20101019-C00012.png)
FR1255231A (fr) 1961-03-03
BE590150A (fr) 1960-08-16
NL251120A (US07816562-20101019-C00012.png)
ES257898A1 (es) 1960-11-01
DE1186802B (de) 1965-02-04
GB897468A (en) 1962-05-30
NL124102C (US07816562-20101019-C00012.png)
CH368423A (de) 1963-03-31

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