US3532517A - Agglomerating nozzle - Google Patents

Agglomerating nozzle Download PDF

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Publication number
US3532517A
US3532517A US688607A US3532517DA US3532517A US 3532517 A US3532517 A US 3532517A US 688607 A US688607 A US 688607A US 3532517D A US3532517D A US 3532517DA US 3532517 A US3532517 A US 3532517A
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US
United States
Prior art keywords
nozzle
tubular
agglomerating
steam
pulverulent
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
US688607A
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English (en)
Inventor
Georges Genton
Gustave Weber
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.)
Nestec SA
Nestle SA
Original Assignee
Nestle SA
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 Nestle SA filed Critical Nestle SA
Application granted granted Critical
Publication of US3532517A publication Critical patent/US3532517A/en
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
    • A23P10/00—Shaping or working of foodstuffs characterised by the products
    • A23P10/20—Agglomerating; Granulating; Tabletting
    • A23P10/22—Agglomeration or granulation with pulverisation of solid particles, e.g. in a free-falling curtain

Definitions

  • Apparatus for agglomerating powdered materials, especially powdered food products comprises a nozzle for injecting the powder into an enclosure and nozzles arranged inside and outside the jet of material to inject fluid, preferably steam, into the material as it is ejected from the nozzle.
  • the invention relates to an apparatus for agglomerating pulverulent products and also the products obtained using this apparatus.
  • agglomerating tower equipped with devices for projecting jets of fluid on the inside.
  • the pulverulent product is introduced at the top, is humidified while passing the fluid jets, agglomerates while descending the tower and leaves the bottom in agglomerated condition.
  • the agglomerates are dried by means of a current of hot air passing through the tower from the bottom to the top and finally by a drying device placed at the end.
  • the jets of fluid generally saturated steam, sometimes mixed with water, are projected inside the tower by means of a series of radial nozzle or pierced tubes, the latter generally arranged in pairs, the holes are approximately facing each other.
  • These devices for projecting the steam are satisfactory to some extent, but their performance is no more than moderate: to obtain the humidification necessary to agglomerate the particles the production is relatively limited.
  • the apparatus according to the invention avoids the disadvantages of known apparatus in that it allows a considerable increase in the production of agglomerates for the same size of tower and for the Same input of steam. Also the product obtained is distinguished by a greater homogeneity and the proportion of fines is reduced.
  • a method of agglomerating a pulverulent material comprises projecting a jet of the material into an enclosure, projecting at least one jet of fluid into the enclosure to impinge on the outside of the jet of material and projecting another jet of fluid to impinge on the inside of the jet of material.
  • an apparatus for agglomerating a pulverulent material comprises at least one tubular nozzle for projecting the pulverulent material into the enclosure, at least one outer nozzle for projecting the fluid outside the jet of pulverulent material and at least one inner nozzle for projecting the fluid inside the jet of material.
  • the inner nozzle comprises an annular orifice.
  • FIG. 1 shows schematically, in longitudinal section, an agglomerating installation equipped with an apparatus according to the invention.
  • FIG. 2 represents, on a larger scale and in partial longitudinal section, the apparatus according to the invention.
  • the casing of an agglomerating tower is shown by 1.
  • a conduit 2 leads in the drying air, which is led out through conduit 3 to a cyclone separator 4 for recovering the fines.
  • the interior of the casing is preferably maintained at low pressure.
  • a conduit 5 leads the pulverulent material to be agglomerated to the agglomerating device 6 Which is fed with saturated steam by conduit 7.
  • the device 6 can be supplied with a mixture of water and steam.
  • the agglomerating device 6, one of the objects of the invention, is represented in greater detail in FIG. 2. It comprises essentially:
  • the tubular nozzle 9 has an unobstructed circular section.
  • accidental obstructions are generally caused by the presence of valves, grills, intersections and other obstacles in the tubular nozzle.
  • the tubular nozzle 9 is slightly widened at its end.
  • the outer nozzle 10 is supplied with steam through conduit 7 from chamber 8: it comprises an exterior lip slightly set back from the mouth of tubular nozzle 9 which is shaped such that the outer nozzle is in the form of a section of an annular cone.
  • the inner nozzle 11 is composed of a tubular element 12 for directing the steam received from conduit 7, this tubular element being covered by a cone 13 carried by a central stem 14 and a supporting member 15 integral with element 12.
  • the lip of element 12 and the edge of cone 13 thus define an orifice of annular shape for projecting the steam. More precisely, the exit of the inner nozzle 11 has the form of an annular ring.
  • the inner nozzle 11 is arranged downstream of the mouth of tubular nozzle 9.
  • the position of the inner nozzle 11 relative to the mouth of tubular nozzle 9 is adjustable so as to vary the distance between them.
  • the operation of the apparatus described is as follows:
  • the pulverulent product is directed and ejected by the nozzle 9. It comes into contact with the jet of steam leaving the nozzle 10.
  • There is a certain spreading of the jet of pulverulent product because of the widened form of the mouth of nozzle 9.
  • the jet of steam concentric with the jet of pulverulent product tends to spread because of the contraction of the exterior edge of the nozzle 10 with respect to its inner edge.
  • This effect is further reinforced by the difference in pressure between the tubular nozzle and the outer nozzle on the one hand and the wall on which they impinge on the other.
  • the two jets, of pulverulent product and steam thus together have the form of a cone open at its base.
  • the inner nozzle 11 projects a sheet of steam also in the form of a cone, but of wider angle.
  • the intersection of the two steam cones from nozzles 10 and 11 produces a tubulence which ensures a complete humidification of the product particles.
  • EXAMPLE The table below gives the results of sieving two agglomerated powders, one by means of a conventional device, i.e. without an inner nozzle, the other by means of a device according to the invention. Both were obtained from the same mixture of sugar and cocoa. These results are expressed as the percentage by weight rejected by different sieve apertures.
  • the invention can be used for agglomerating many types of product, especially food products such as tea or soluble coffee, whole or skimmed milk powder, foods for babies etc.
  • Apparatus for agglomerating pulverulent material comprising in combination a casing enclosing a space constituting an agglomerating zone, and an agglomerating device including a tubular nozzle,
  • a third nozzle positioned within said casing downstream of the outlets of said tubular nozzle and said other nozzle, said third nozzle comprising a tubular conduit disposed within said casing co-axially with said tubular nozzle and having a tip end, a cone shaped member fixed to the tip end of said tubular conduit, said cone shaped member having its apex proximate and its base end remote from the outlet of said tubular nozzle, the base end of said cone being spaced from the tip end of said tubular conduit whereby the edge of the base end of the cone and the tip end edge of said tubular conduit define an annular orifice for issuing a stream of pressurized fluid therefrom laterally of the axis of said tubular nozzle and said other nozzle, said annular orifice being spaced from the outlets of said tubular nozzle and said other nozzle such that the pressurized fluid issues therefrom internally of the cone of material and pressurized fluid issuing from said tubular and other nozzles.
  • Apparatus for agglomerating pulverulent material comprising in combination a casing enclosing a space constituting an agglomerating zone, and an agglomerating device including a tubular nozzle,
  • a third nozzle positioned within said casing downstream of the outlets of said tubular nozzle and said other nozzle, said third nozzle comprising a tubular nozzle such that the pressurized fluid issues therefrom internally of the cone of material and pressurized fluid issuing from said tubular and other nozzles.
  • Cited conduit disposed within said casing co-axially with 5 said tubular nozzle and having a tip end, a member UNITED STATES PATENTS having a circular edge fixed to the tip end of said 3,085,492 4/1963 99' 234 tubular conduit, said member being spaced from 3143'428 8/1964 Relmers et 99 234 XR the tip end of said tubular conduit whereby the cir- 3,331,306 7/1967 Hutton 99 234 cular edge of the member and the tip end edge of 10 said tubular conduit define an annular orifice for issuing a stream of pressurized fluid therefrom laterally of the axis of said tubular nozzle and said other nozzle, said annular orifice being spaced from 15 the outlets of said tubular nozzle and said other 34*468 FREDERICK L.
  • MATTESON 111., Primary Examiner H. B. RAMEY, Assistant Examiner US. Cl. X.R.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Tea And Coffee (AREA)
  • Materials For Medical Uses (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Dairy Products (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
US688607A 1966-12-30 1967-12-06 Agglomerating nozzle Expired - Lifetime US3532517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1885866A CH473607A (fr) 1966-12-30 1966-12-30 Procédé d'agglomération d'un produit pulvérulent

Publications (1)

Publication Number Publication Date
US3532517A true US3532517A (en) 1970-10-06

Family

ID=4435713

Family Applications (1)

Application Number Title Priority Date Filing Date
US688607A Expired - Lifetime US3532517A (en) 1966-12-30 1967-12-06 Agglomerating nozzle

Country Status (9)

Country Link
US (1) US3532517A (de)
AT (1) AT282569B (de)
BE (1) BE707915A (de)
CH (1) CH473607A (de)
DE (1) DE1667278B2 (de)
ES (1) ES348771A1 (de)
FR (1) FR1549817A (de)
GB (1) GB1197628A (de)
NO (1) NO122589B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH627949A5 (fr) * 1978-03-14 1982-02-15 Nestle Sa Procede d'agglomeration et appareil pour sa mise en oeuvre.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085492A (en) * 1956-03-26 1963-04-16 Western Condensing Co Apparatus for the treatment of dry powdered materials
US3143428A (en) * 1962-10-10 1964-08-04 American Sugar Method and apparatus for agglomeration
US3331306A (en) * 1965-05-07 1967-07-18 Foremost Dairies Inc Conditioning apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085492A (en) * 1956-03-26 1963-04-16 Western Condensing Co Apparatus for the treatment of dry powdered materials
US3143428A (en) * 1962-10-10 1964-08-04 American Sugar Method and apparatus for agglomeration
US3331306A (en) * 1965-05-07 1967-07-18 Foremost Dairies Inc Conditioning apparatus

Also Published As

Publication number Publication date
ES348771A1 (es) 1969-03-16
FR1549817A (de) 1968-12-13
DE1667278A1 (de) 1972-03-30
CH473607A (fr) 1969-06-15
DE1667278B2 (de) 1976-05-26
AT282569B (de) 1970-07-10
BE707915A (de) 1968-06-13
NO122589B (de) 1971-07-19
GB1197628A (en) 1970-07-08

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