US2559989A - Spray drier - Google Patents

Spray drier Download PDF

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Publication number
US2559989A
US2559989A US648774A US64877446A US2559989A US 2559989 A US2559989 A US 2559989A US 648774 A US648774 A US 648774A US 64877446 A US64877446 A US 64877446A US 2559989 A US2559989 A US 2559989A
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chamber
drying
channel
medium
drying medium
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US648774A
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English (en)
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Nyrop Johan Ernst
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
    • C11D13/26—Drying

Definitions

  • This invention relates to the drying of liquid matters, such as solutions, suspensions or slurries or more or less flowable colloidal systems, such as blood or fractions thereof, protein solutions, milk, condensed milk, soap at varying water contents and temperatures and many others.
  • drying is used not only for the process of converting a substance into its solid, dry form, but comprises also the conversion of a liquid into a state, in which it contains less water, than it did before drying, or into a state where water is bound by crystallization.
  • drying in the sense in which it is used in the following specification and in the claims, includes also condensing or concentrating or crystallizing the liquid in question.
  • the invention relates to dry- I ing a liquid material by atomization and distribution into a current of a gaseous drying medium, such as atmospheric air, passing through a closed drying chamber, the material to be dried and the drying medium being supplied in the upper part of the chamber and the drying medium being withdrawn from the lower part of the chamber carrying all or more or less of the dried particles of the atomized material with it.
  • a gaseous drying medium such as atmospheric air
  • the drying medium is introduced at or through the outer wall of the chamber, whereby it cannot be prevented, however, that this wall takes a comparatively high temperature.
  • the wall will very often be so hot that material contacting therewith and adhering in its still moist condition thereto will be more or less damaged or burnt.
  • One object of the present invention is to provide a method and an apparatus, in which less space is required for efiecting a given amount of drying, than in the known apparatus of the general kind mentioned above with or without a revolving movement of the drying medium.
  • Another object of the present inventioin is to provide a method and an apparatus, in which the tendency of the atomized material to adhere to certain of the surfaces surrounding the drying space, for instance the ceiling of the drying chamber or the parts di posed in the central part of the chamber, which tendency has been experienced in the case, when the drying medium is introduced from the central part of the drying chamber, can be avoided or diminished.
  • the said turbulence is not influenced by the drying medium being caused to rotate about the vertical axis of the chamber, but it is emphasizedifthereisusedonlyone atomizerdisposed in the middle of the chamber, which ior many other reasons is a very duirable arrangement.
  • I introduce into the chamber at least one current of drying medium in a direction differing from the travelling direction of the current oi drying medium moving through the drying chamber at the place where the additional current is introduced.
  • Bythismeansitispossibletodisturbthesaid undesirable turbulence or to counteract or even 4 to reverse it 'so that a turbulence moving in the opposite direction is produced.
  • I introduce into the drying chamber a current of drying medium moving upwards along the wall of the chamber.
  • the dryingmediumusedtoupsetthesecurrents accord ing to the embodiment of the method is withdrawn from the chamber itself, the withdrawal being carried out at atleastone point cit-be chamber dwelring from that in V which it isinh-oduced again and in a direction din'ering from the direction in which the drying medium moves in the chamber or in which it would move when no additional current were impelling thereon.
  • drying medium withdrawn from the chamber to upset the current or currents counteracting the said undesired turbulence the advantage is obtained that such drying medium will have a lower temperature than the fresh drying medium supplied centrally into the chamber and thus cannot damage the material to be dried and in case it is to,be introduced through the outer wall cannot heat the same to any undesirable temperature and cause damage to the material getting in contact with it.
  • FIG. 1 is an embodiment of the drying apparatus in vertical section through the axis of the drying chamber
  • Fig. 2 is another embodiment, shown in the same manner, and v V Fig. 3 shows diagrammatically the plant, in which the drying apparatus, shown in Fig. 2, works.
  • Fig. 1 I is a rotating atomizerv suspended from the ceiling of a cylindrical or polygonal container, the drying chamber 2.
  • a distributing member 3 for supplying the drying medium, for
  • the distributing member in the preferred embodiment shown is placed at the opening of a duct or channel 4, introduced in the chamber through the lower part of its wall and standing vertically in the middle of the chamber. Through this channel or duct the drying medium is supplied.
  • the lower part of the chamber 2 in the embodiment shown is formed as a cone or pyramid 9, having at its point an opening with a closure 8, through which dried material, that has settled to the bottom, can be removed.
  • the dry particles will be carried away with the drying medium leaving the chamber, and the conical shape of the bottom of the chamber therefore in such cases is not important.
  • Adjacent to the bottom of the chamber is the opening i of a duct or channel 5, through which the drying medium is withdrawn, carrying with it all or some of the dried material.
  • a channel It the end of which forms a. collar surrounding the lower part of the vertical part of the duct I said collar being open at its upper end, penetrates the lower part of the wall of the chamber.
  • Another channel I penetrates the side wall of the chamber at a point lower than that, in which the material is atomized and distributed. in the embodiment shown the channel I penetrates the wall in horizontal direction radiallytothe chamber.
  • the apparatus shown in Fig. 1 operates in the following manner. Leaving first out of consideration the channels it and I, by introducing the material to be dried through the atomizer and the drying medium through the channel 4 and distributor 3 and withdrawing the drying medium carrying dry material with it through the duct 5 the undesirable turbulence shown by the dotted arrows 21 will make its appearance. By now withdrawing drying medium through the channel I5 and returning it through the channel 1 this turbulence will be counteracted and a turbulence essentially as shown by the fully drawn arrows '25 will result.
  • the direction, in which the drying medium is withdrawn by means of the collar and channel I5 is downwardly in the middle of the chamber, which is a direction that differs essentially from the direction, in which the drying medium would move at this point had there been no withdrawal through the duct l5 or no addition through the channel I. ,In fact it is opposite thereto.
  • the direction,-in..which the current arrives through the channel I differs radically from the direction, in which the drying medium would move at this point if there had been no supply through said channel or withdrawal through the channel and collar Hi.
  • the undesirable turbulence in this manner may be at least partially reversed i. e. the lower part of it is reversed.
  • FIG. 2 another embodiment is shown.
  • the kind and arrangement of the atomizer and the arrangement of the supplying channel 4 and the withdrawal channel 5 for the drying medium are similar to Fig. 1.
  • a supplying tube 28 to permit a current of drying medium to be introduced at this place.
  • annular chamber l4 Surrounding the top of the channel 4 there is an annular chamber l4, which has an annular opening at its lowermost end so as to permit a current of drying medium to be sent therethrough downwards along the wall of the vertical part of the channel 4.
  • Obvious variations in this embodiment of the invention may for instance consist in that a shield is provided in the chamber in front of the opening of the channel 1, said shield being so placed that the air withdrawn through said channel is introduced therein from below.
  • the opening of the channel I may be replaced by several openings round the circumference of the chamber.
  • drying medium is withdrawn through the tube 28 of the cone and introduced through the channel I.
  • the introduction of drying me'-" dium through the channel I will actively disturb the undesirable turbulence, but in this case, when drying medium is withdrawn from the point of i the cone, the guiding surface I. must be omitted to prevent the formation of a distinct current opposite to the arrows shown, along the walls of thechamber, in the downwarddirection.
  • Fig. 3 shows the embodiment of Fig. 2 as a part of a drying plant.
  • 24 is a channel, through which fresh air is taken in and carried to a propelling device It, blowing the air through heating means II and through the channel 4 to the distributor 3" by which it is supplied to the drying chamber.
  • the outlet channel 5 from the drying chamber leads to a centrifugal separator 20, in which the main part of the dried product is removed from the air and then the air is carried to a straining device, washing separator or any other device 2
  • the air goes through an outlet channel 23 to the atmosphere.
  • a branch channel 22 returns to the inlet channel 24.
  • a predetermined part of the air controlled by valves 2! or the like can be returned to the system and mixed with the air taken in through the channel H.
  • the channel 'I and tube 28 are connected by a tube IT, in which a propelling device It is inserted.
  • the channels l3 and 14 are connected with the channel 8 or with the pressure side of the propelling device 16 by tubes not shown in the figure.
  • the purpose of the invention has been attained by circulation of a rather considerable amount of drying medium per unit of time, but the purpose can be equally well attained by the introduction by means of suitable nozzles of comparatively small quantities of drying medium at comparatively high Pressure and velocity in a manner otherwise similar to that shown and described, so that the supply is carried out in such direction and in such points that the described undesirable turbulence is counteracted, disturbed or reversed.
  • a closed chamber provided at its lower portion with a discharge duct; a pipe passed through the top of said chamber and disposed co-axially of said chamber; an atomizer on the end of said pipe and disposed in the upper portion of said chamber; a, second pipe passed through the wall of said chamber and having its terminal portion in said chamber disposed co-axially with said first pipe; a nozzle on the end of said terminal portion and disposed closely adjacent said atomizer; a discharge conduit passed through the wall ofsaid chamber and having an annular intake portion dispose about the lower end of said terminal portion; and a supply conduit passed through the wall of said chamber, connected with said discharge conduit and having per part of the chamber, said introducing pipe comprising a channel a part or which stands vertically in the middle of the chamber and carries at its top a distributor for thegasecus drying me dium a discharge pipe in the side or said chamber for the withdrawal of the drying medium together with the dried material carried thereby from the lower part
  • a closed chamber provided at its lower portion with a discharge duct; a pipe passed through the top oi said chamber and disposed co-axially oi said chamber; an atomizer on the end of said pipe and disposed in the upper portion of said chamber; a second pipe passed through the wall of said chamber and having its terminal portion in said chamber disposed co-axially with said first pipe; a nozzle on the end of said terminal portion and disposed closely adjacent said atomizer; a supply pipe passed through the, bottom of said chamber; a discharge pipe passed through the wall of said chamber, disposed normal to the common axis 01' said first pipe and said terminal portion, connected with said supply pipe and having its intake end in said chamber disposed below said nozzle.
  • Drying apparatus comprising a substantially closed chamber, a supply pipe in the. top of said chamber for introducing the material to be dried in the atomized state in the upper part thereof, a pipe in the side of said chamber for introducing a gaseous drying medium centrally in the uptially closed chamber, a supply pipe in the top the side of the chamber for an additional current of said medium and said material, and an outlet duct disposed peripherally at the lower part of said channel and having an aperture at the upper side thereof through which a current of said medium and said material is caused to enter in a downward direction along the wall of said.
  • Drying apparatus comprising a substantially closed circular chamber having an inverted conical bottom, a supply pipe in the top of said chainber for introducing the material to be dried in the atomized state in the upper part thereof, a pipe mounted in the side of said chamber for introducing a gaseous drying medium centrally in the upper part of the chamber and with a circulatory movement during its passage through the chamber, a discharge pipe in the side of said chamber for withdrawal of the drying medium together with the dried material carried thereby from the lower part of the chamber, and an inlet pipe in the center of said conical bottom for introducing a diffused current of said medium and said material for movement upwardly along the walls of the chamber.
  • Drying apparatus comprising a substantially closed circular chamber having a conical bottom, a supply 'pipe in the top of said chamber for introducing the material to be dried into the upper part thereof in the atomized state, a pipe mounted in the side of said chamber for introducing a gaseous medium centrally in the upper part of the chamber, a discharge pipe mounted in the side of said chamber for withdrawing the drying medium and the dried material carried thereby from the lower part of the chamber, an inlet pipe in the center of said conical bottom for introducing a drying medium and withdrawal 01 it from the lowv or part of the chamber are continued.
  • Drying apparatus comprising a substantially closed cylindrical chamber, a supply pipe in the top of said chamber for introducing the material to be dried into the upper part thereof in the atomized state, a pipe mounted in the side of said chamber for introducing a main current of a gaseous dryin medium centrally in the upper part of the chamber, below the atomized material, a discharge pipe mounted in the side of said chamber for withdrawing the drying medium and the dried material carried thereby from the lower part of the chamber, a supply pipe in the top of said chamber for introducing an additional current of said medium and said material adjacent to the center of the ceiling of the chamber and for movement along the ceiling radially of the vertical axis of the chamber.
  • Drying apparatus comprising a substanof said chamber for introducing the material to be dried into the upper part thereof in the atomized state, a pipe in the side of said chamber for introducing a current of a gaseous drying medium centrally in the upper part of the chamber, a diffusion member for distributing said current evenly radially of the introducing pipe, said pipe for introducing said medium being disposed centrally in the chamber below said pipe for introducing the material, and said diffusion member, and having a vertical channel centrally of the chamber for leading said current to the difiusion member, said difl'usion member being mounted upon the top of said channel, an outlet duct disposed peripherally of said channel for producing an additional current of said medium and said material for movement downwardly along the wall of said channel, and a discharge port for withdrawal Of said medium and the dried material carried thereby from the lower part of the chamber.
  • Drying apparatus comprising a substantially closed chamber, a.
  • Drying apparatus comprising a substantially closed circular chamber having an inverted conical bottom, supply pipe in the top of said chamber for introducing the material to be dried in the atomized state in the upper part thereof. a pipe mounted in the side of said chamber for introducing a gaseous drying medium centrally in the upper part of circulatory movement during its passage through the chamber, a discharge pipe mounted in the side of said chamber for withdrawal of the drying medium together with the dried material carried thereby from the lower part of the chamber, and an inlet pipe in the center of said conical bottom for introducing a, difl'used current of pipe for evacuating said mass the chamber and with a v said medium for movement upwardly along the walls of the chamber.
  • Drying apparatus comprising a substantially closed circular chamber having a cor bottom, a supply pipe in the top of said Chi. her for introducing the material to be dried into the upper part thereof in the atomized state, a pipe mounted in the side of said chamber for introducing a gaseous medium centrally in the upper part of the chamber, a discharge pipe mounted in the side of said chamber for withdrawing the drying medium and the dried material carried thereby from the lower part of the chamber, an inlet pipe in the center of said conical bottom for introducing a diliused current of said medium for movement upwardly along the walls of the chamber, and an outlet pipe for withdrawing said medium and said material from another part of the chamber in a direction differing from that in which the main current of drying medium will move when the current introduced in the center of the bottom, and the withdrawn current are discontinued, while the central introduction of the drying medium and withdrawal of it from the lower part of the chamber are continued.
  • Drying apparatus comprising a substantially closed cylindrical chamber, a supply pipe in the top of said chamber for introducing the material to be dried into the upper part thereof in the atomized state, a pipe mounted in the side of said chamber for introducing a main current of a gaseous drying medium centrally in the upper part of the chamber, below the atomized material, a discharge pipe mounted in the side of said chamber for withdrawing the drying medium and the dried material arried thereby from the lower part of the chamber, a supply pipe in the top of said chamber for introducing an additional current of said medium adjacent to the center of the ceiling of the chamber and for the movement along the ceiling radially of the vertical axis of the chamber.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)
US648774A 1941-10-09 1946-02-19 Spray drier Expired - Lifetime US2559989A (en)

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FR (1) FR920502A (xx)
NL (1) NL62483C (xx)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707990A (en) * 1948-04-26 1955-05-10 Niro Corp Method and apparatus for the drying, concentration or crystallization of liquid materials
US2750998A (en) * 1951-11-29 1956-06-19 Moore David Pelton Apparatus for reducing food liquids to powders
US2798544A (en) * 1952-02-28 1957-07-09 Purex Corp Ltd System for producing high density detergents
US2851097A (en) * 1950-11-10 1958-09-09 Colgate Palmolive Co Apparatus for and method of separating gas from solids
US2957519A (en) * 1957-11-12 1960-10-25 John G Hoad Spray drying apparatus and method
US2992141A (en) * 1958-06-02 1961-07-11 Foremost Dairies Inc Crystal separating process
US3112239A (en) * 1959-05-02 1963-11-26 Alfa Laval Soc Method and apparatus for preparing very soluble fine powders from liquids
US3963559A (en) * 1971-01-19 1976-06-15 Mogens Petersen Spray drying device for the production of powder, e.g. milk powder
US4002524A (en) * 1971-09-10 1977-01-11 Aktieselskabet Niro Atomizer Method and apparatus for evaporating liquid
US4013504A (en) * 1975-09-18 1977-03-22 Morris Walter E Method and apparatus for spray drying slurries and the like
US4052255A (en) * 1971-10-07 1977-10-04 J. M. Huber Corporation Spray dryer discharge system
CN116730494A (zh) * 2023-08-10 2023-09-12 浙江开创环保科技股份有限公司 Mabr污水处理装置、污水处理方法及其应用

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1213887A (en) * 1916-11-29 1917-01-30 Georg A Krause Method of vaporizing or concentrating liquids, solutions, emulsions, suspensions, and like substances.
AT76782B (de) * 1912-07-31 1919-06-10 Georg Alexander Krause Verfahren zum Verdampfen von flüssigem, zu trocknendem Gut.
US1374555A (en) * 1920-01-31 1921-04-12 Internat Dry Milk Company Dehydrated milk and process of producing same
US1490208A (en) * 1920-11-11 1924-04-15 American Drying Processes Inc Method for desiccation
US1491026A (en) * 1918-10-11 1924-04-22 Corn Prod Refining Co Method of and apparatus for evaporating liquid substances
US1594064A (en) * 1922-01-19 1926-07-27 John M Maclachlan Apparatus for finely dividing and drying fluid substances
US1734677A (en) * 1925-12-04 1929-11-05 Int Comb Eng Corp Air washer
US1754941A (en) * 1927-04-20 1930-04-15 Lab Products Company Spray drier
US1756772A (en) * 1927-04-25 1930-04-29 Alchemic Gold Company Inc Method of coating materials
US1829477A (en) * 1925-12-30 1931-10-27 Douthitt Frank Howard Process of and apparatus for drying liquids
US1914895A (en) * 1928-07-16 1933-06-20 David D Peebles Desiccating method and apparatus
US2010101A (en) * 1932-03-28 1935-08-06 Albert P Hunt Method and apparatus for drying liquid and semi-liquid materials
GB478925A (en) * 1936-04-14 1938-01-27 Niro Atomizer As Method of pulverizing melted products by atomization
GB530613A (en) * 1938-06-28 1940-12-16 Oskar Zahn Improvements in and relating to apparatus for evaporating liquids
US2277827A (en) * 1939-05-24 1942-03-31 Dow Chemical Co Process of dehydrating magnesium chloride
US2280073A (en) * 1939-05-15 1942-04-21 Joseph M Hall Method and apparatus for dehydrating liquid products
GB552475A (en) * 1941-12-02 1943-04-09 Res Ass Of British Flour Mille Improvements in or relating to the drying of solution or suspensions of pulverulent matter in a liquid
US2333333A (en) * 1940-01-24 1943-11-02 Golden State Company Ltd Desiccating apparatus and method
US2415527A (en) * 1942-07-03 1947-02-11 Golden State Company Ltd Method of atomizing and desiccating substances and apparatus therefor
US2473035A (en) * 1945-11-02 1949-06-14 Western Condensing Co Spray device

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT76782B (de) * 1912-07-31 1919-06-10 Georg Alexander Krause Verfahren zum Verdampfen von flüssigem, zu trocknendem Gut.
US1213887A (en) * 1916-11-29 1917-01-30 Georg A Krause Method of vaporizing or concentrating liquids, solutions, emulsions, suspensions, and like substances.
US1491026A (en) * 1918-10-11 1924-04-22 Corn Prod Refining Co Method of and apparatus for evaporating liquid substances
US1374555A (en) * 1920-01-31 1921-04-12 Internat Dry Milk Company Dehydrated milk and process of producing same
US1490208A (en) * 1920-11-11 1924-04-15 American Drying Processes Inc Method for desiccation
US1594064A (en) * 1922-01-19 1926-07-27 John M Maclachlan Apparatus for finely dividing and drying fluid substances
US1734677A (en) * 1925-12-04 1929-11-05 Int Comb Eng Corp Air washer
US1829477A (en) * 1925-12-30 1931-10-27 Douthitt Frank Howard Process of and apparatus for drying liquids
US1754941A (en) * 1927-04-20 1930-04-15 Lab Products Company Spray drier
US1756772A (en) * 1927-04-25 1930-04-29 Alchemic Gold Company Inc Method of coating materials
US1914895A (en) * 1928-07-16 1933-06-20 David D Peebles Desiccating method and apparatus
US2010101A (en) * 1932-03-28 1935-08-06 Albert P Hunt Method and apparatus for drying liquid and semi-liquid materials
GB478925A (en) * 1936-04-14 1938-01-27 Niro Atomizer As Method of pulverizing melted products by atomization
GB530613A (en) * 1938-06-28 1940-12-16 Oskar Zahn Improvements in and relating to apparatus for evaporating liquids
US2280073A (en) * 1939-05-15 1942-04-21 Joseph M Hall Method and apparatus for dehydrating liquid products
US2277827A (en) * 1939-05-24 1942-03-31 Dow Chemical Co Process of dehydrating magnesium chloride
US2333333A (en) * 1940-01-24 1943-11-02 Golden State Company Ltd Desiccating apparatus and method
GB552475A (en) * 1941-12-02 1943-04-09 Res Ass Of British Flour Mille Improvements in or relating to the drying of solution or suspensions of pulverulent matter in a liquid
US2415527A (en) * 1942-07-03 1947-02-11 Golden State Company Ltd Method of atomizing and desiccating substances and apparatus therefor
US2473035A (en) * 1945-11-02 1949-06-14 Western Condensing Co Spray device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707990A (en) * 1948-04-26 1955-05-10 Niro Corp Method and apparatus for the drying, concentration or crystallization of liquid materials
US2851097A (en) * 1950-11-10 1958-09-09 Colgate Palmolive Co Apparatus for and method of separating gas from solids
US2750998A (en) * 1951-11-29 1956-06-19 Moore David Pelton Apparatus for reducing food liquids to powders
US2798544A (en) * 1952-02-28 1957-07-09 Purex Corp Ltd System for producing high density detergents
US2957519A (en) * 1957-11-12 1960-10-25 John G Hoad Spray drying apparatus and method
US2992141A (en) * 1958-06-02 1961-07-11 Foremost Dairies Inc Crystal separating process
US3112239A (en) * 1959-05-02 1963-11-26 Alfa Laval Soc Method and apparatus for preparing very soluble fine powders from liquids
US3963559A (en) * 1971-01-19 1976-06-15 Mogens Petersen Spray drying device for the production of powder, e.g. milk powder
US4002524A (en) * 1971-09-10 1977-01-11 Aktieselskabet Niro Atomizer Method and apparatus for evaporating liquid
US4052255A (en) * 1971-10-07 1977-10-04 J. M. Huber Corporation Spray dryer discharge system
US4013504A (en) * 1975-09-18 1977-03-22 Morris Walter E Method and apparatus for spray drying slurries and the like
CN116730494A (zh) * 2023-08-10 2023-09-12 浙江开创环保科技股份有限公司 Mabr污水处理装置、污水处理方法及其应用
CN116730494B (zh) * 2023-08-10 2024-05-28 浙江开创环保科技股份有限公司 Mabr污水处理装置、污水处理方法及其应用

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Publication number Publication date
FR920502A (fr) 1947-04-10
CH245661A (de) 1946-11-30
NL62483C (xx)

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