US3058516A - Means for distributing viscous substances on falling film evaporators - Google Patents

Means for distributing viscous substances on falling film evaporators Download PDF

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Publication number
US3058516A
US3058516A US725743A US72574358A US3058516A US 3058516 A US3058516 A US 3058516A US 725743 A US725743 A US 725743A US 72574358 A US72574358 A US 72574358A US 3058516 A US3058516 A US 3058516A
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United States
Prior art keywords
rollers
evaporator
shaft
roller
falling film
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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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US725743A
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English (en)
Inventor
Brunk Konrad
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Bayer AG
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Bayer AG
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Filing date
Publication date
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Publication of US3058516A publication Critical patent/US3058516A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B01D1/222—In rotating vessels; vessels with movable parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/02—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by influencing fluid boundary

Definitions

  • the distributors hitherto usually employed in thin-' layer evaporators consist of brushes, wiper blades, doctors or scrapers, which are arranged on a shaft rotating in the evaporator body and slide on the inside wall of the latter or sweep past close alongside the same.
  • the fine dust being formed with rubbing or sliding distributor elements enters into the substance being processed and contaminates the latter, this being undesirable in many cases.
  • the aforementioned distributor devices which have so far been employed can only be used under certain circumstances, since it is frequently not possible to obtain with them a uniform distribution of these viscous masses on the inside wall of the evaporator.
  • the distributor device consists, in accordance with the invention, of at least one roller which is rotatably mounted in cross-members connected to the shaft and in addition is preferably movable radially in slots of the cross-members, so that it rolls on the inside Wall of the evaporator chamber owing to centrifugal force as the shaft rotates and thus distributes the product to be processed. Since the roller rotates, the rubbing action is neglig ly 211, 50 that Contamination of the substance being treated is practically avoided.
  • the roller can also be so arranged, for example by stop devices, that it is stopped at a certain distance from the inside wall.
  • rollers By using such rollers, not an thin liquid but especially also very viscous masses can be satisfactorilyrolled out on the inside wall to provide a thin film.
  • the use of the distributor according to the invention also provides an increase in the evaporator surface and thus an increase in the evaporator output, since as the rollers rotate, some of the substance to be treated is also taken up on the surface of the said rollers.
  • the rollers are provided with an internal heating system.
  • the rollers In order in certain cases to obtain a positive or negative slipping of their surfaces on the inside wall, the rollers are provided with an independent driving means.
  • a supplementary pressure device for example a resilient pressure device.
  • the construction of the distributor device can be varied in many ways, depending on the number and diameter of the rollers and also the arrangement and shape thereof.
  • the rollers can be made of the same length as the length of the evaporator which is to be swept over.
  • the rollers especially when they are of small diameter, can be mounted not only at the top and bottom, but once or several places along their length.
  • rollers of shorter length can be arranged in series or adjacent one another.
  • the rollers can be of conical shape instead of being of cylindrical form.
  • the rollers can be shaped, for example provided with spiral threads.
  • the rollers can be arranged with their central axis inclined to the central axis of the evaporator and they are then given for example an ellipsoid form.
  • FIGURE 1 is a longitudinal section through an evaporator body having distributor rollers for thinly liquid and thickly liquid substances.
  • FIGURE 2 is a cross-section through this apparatus,
  • FIGURE 3 is a longitudinal section through an evaporator with a distributor device which is particularly suitable for highly viscous pastry substances.
  • FIGURE 4 shows a constructional example of an internally heated roller
  • FIGURE 5 shows a roller with its own driving means
  • FIGURE 6 shows a roller with a spring pressure device
  • FIGURES 7 and 8 show a distributor device having rollers arranged inclined in relation to the evaporator axis.
  • the reference 1 represents the everorator chamber with the heating jacket 2.
  • the driving shaft 3 Arranged in the evaporator 1 is the driving shaft 3 with the crossmembers 4 fixed thereon, the rollers 6 being rotatably mounted by means of their journals 7 in the slots 5 of said crossmeinbers.
  • the inlet tube for the material to be treated in indicated at 8.
  • the rotatably mounted distributor rollers 6 are.
  • the a a ge en how in FIGURE 3 which is more especially suitable for distributing viscous substances which no longer are able to ssii iilyw h e f ce at r i y w ng o the r a es n power, also consists of the evaporator casing 1 with the heating jacket 2, the cross-members 4 of the shaft 3, the rotatably arranged rollers 6 and a supply pipe 8 for the a er aln t is a e.
  • a p qpe le m m 9 formed of a spiral two-thread worm of flat sheet metal blading is additionally arranged on the shaft 3 so that about two thirds of the length of the worm is above and one third is below the supply pipe 8 and that the lower ends of the Worm threads extend to between the upper ends of the distributor rollers 6.
  • This propeller member 9 urges the material downward-1y on the evaporator surface and away from outlet 10 and prevents any doughy viscous product forced into the apparatus from damming up in the space above the rollers.
  • the evaporator casing 1 is equipped with an outlet pipe 10 for the distillate vapours and an outlet pipe 11 for the residue.
  • the shaft 3 is guided through the cover 12 of the evaporator casing 1 and carries at its end a driving pulley 13.
  • the passage for the shaft through the cover 12 is sealed by means of a stufiing box.
  • the roller is made hollow and is rotatably mounted on the hollow angle piece 16 of the hollow cross-member 17.
  • Fixed to the journal of the angle piece 16 is a heating element 18 which serves to heat the interior of the roller 15.
  • the leads 19 for supplying the heating current are led outwardly through the hollow part of the shaft 20 to slip rings.
  • FIGURE 5 shows a distributor roller with a separate or individual driving means.
  • 21 represents the internal wall of the evaporator
  • 22 the supply opening for the product to be treated
  • 23 the discharge pipe for the distillate vapours
  • 24 the main driving shaft
  • 25 an internally toothed crown wheel which is fixed to the collar
  • 27 is a bushing which is connected fast to the shaft 24 and which is provided at the upper end with a disc 27a and at the bottom end with a cross-member 27b forked at its ends
  • 28 is a gear wheel mounted in the disc 27a and having a pinion 28a which meshes with the crown wheel 29 is an intermediate pinion mounted in the disc 27a
  • 30 is the driving pinion for the roller and mounted in the disc 27a
  • 31 is the roller with its upper bearing journal 31a
  • 33 are blocks sliding in the forks of the cross-member providing bearings for the journals of the rollers
  • 34, 35 and 36 are articulated shaft connections between the pinion 30 and the roller journal 31a.
  • the peripheral speed of the roller is equal to, larger than or smaller than the peripheral speed of a point around the shaft 24 at the distance of half the diameter of the evaporator space, i.e. the surface of the roller either has no slip, or a positive or negative slip, relatively to the inside wall of the evaporator.
  • a displacement of the rollers, which is necessary when distributing the productwhich is to be treated, is obtained by mounting the rollers in blocks sliding in the forks of the cross-members.
  • rollers 38 rolling on the wall of the container 37 have their ends mounted in sliding members 39 and are forced by means of the leaf springs 40 against the wall 37 by means of the sliding blocks 39 displaceable in the cross-members 41.
  • FIGURES 7 and 8 A distributor device having rollers arranged at an inclination to the means axis is shown in FIGURES 7 and 8 and therefore having an elliptical profile.
  • 42 is the driving shaft
  • 43 is the upper and lower cross-members connected fast to the shaft 42
  • 45 are the convex inclined rollers movably mounted in the forked ends of the cross-members
  • 46 is the wall of the evaporator space
  • 47 is the supply pipe for the product.
  • the product to be processed is given a downward thrust by the rotating inclined rollers and this assists the action of the force of gravity.
  • An evaporator comprising an evaporator chamber 4 having an inlet having material to be treated and an outlet for withdrawal of vapor, roller means below said inlet and adapted to spread said material thinly on the inner wall of said chamber, and propeller means within said chamber extending from said inlet below said roller means to advance such material thereto.
  • roller means includes at least one roller urged by centrifugal force in the direction of said chamber inner-wall.
  • An evaporator as set forth in claim 4 in which said chamber is provided with a central vertical rotatable shaft and said propeller and roller means are adapted to be rotated in said chamber by said shaft.
  • An evaporator comprising a cylindrical evaporator chamber having an inlet for material to be treated and an outlet for withdrawal of vapor, a central vertical shaft, a plurality of rollers mounted for rotation upon and by said shaft, and adapted to be urged by centrifugal force toward the inner wall of said chamber and to spread said material thinly thereon, spiral blading carried by said shaft and rotatable therewith, adjacent the inner wall of said chamber and extending above said inlet substantially two-thirds of the overall length of the blading and above said inlet to propel said material from the inlet to said rollers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
US725743A 1957-04-05 1958-04-01 Means for distributing viscous substances on falling film evaporators Expired - Lifetime US3058516A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF22752A DE1044764B (de) 1957-04-05 1957-04-05 Vorrichtung zur Verteilung fliessfaehiger sowie zaeher, klebriger oder pastoeser Substanzen an der Innenwand von Duennschichtverdampfern

Publications (1)

Publication Number Publication Date
US3058516A true US3058516A (en) 1962-10-16

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ID=7090561

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US725743A Expired - Lifetime US3058516A (en) 1957-04-05 1958-04-01 Means for distributing viscous substances on falling film evaporators

Country Status (7)

Country Link
US (1) US3058516A (ja)
BE (1) BE566415A (ja)
CH (1) CH364243A (ja)
DE (1) DE1044764B (ja)
FR (1) FR1194059A (ja)
GB (1) GB839793A (ja)
NL (1) NL107997C (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180398A (en) * 1961-10-05 1965-04-27 Rodney Hunt Machine Co Thin film thermal processor
US3225817A (en) * 1963-03-23 1965-12-28 Huels Chemische Werke Ag Rotor for thin-layer vaporizers
US3251398A (en) * 1963-09-26 1966-05-17 Greenfield Charles Process for dehydrating waste solids concentrates
US3252502A (en) * 1962-01-19 1966-05-24 Allied Chem Centrifugal wiped film evaporation process for viscous materials
US3316958A (en) * 1964-04-22 1967-05-02 Henry Balfour And Company Ltd Film molecular stills and evaporators
US3334680A (en) * 1965-06-07 1967-08-08 Head Wrightson & Co Ltd Rotary wiped film evaporator
US3349828A (en) * 1966-08-05 1967-10-31 Artisan Ind Rotary wiped film evaporator with annular ring for process material flow control
US3382158A (en) * 1966-04-01 1968-05-07 Bendix Corp Wiped film molecular still
US3970510A (en) * 1973-09-03 1976-07-20 Yashima Chemical Engineering Co., Ltd. Method and apparatus for converting a liquid material into a powder
CN107617225A (zh) * 2017-10-18 2018-01-23 深圳佰思嘉科技有限公司 圆环式干燥机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177621B (de) * 1961-02-06 1964-09-10 Huels Chemische Werke Ag Verteiler- und Foerdervorrichtung, insbesondere fuer Duennschichtverdampfer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1284974A (en) * 1916-05-24 1918-11-19 Ohio Brass Co Strain-insulator.
US1895740A (en) * 1931-07-06 1933-01-31 Bozidar J Ukropina Method of making concrete pipe
US2032785A (en) * 1932-06-20 1936-03-03 Low Temperature Proc Company Method of and apparatus for disassociating the components of solutions and mixtures
US2306496A (en) * 1941-04-23 1942-12-29 Concrete Products Company Apparatus for forming lined concrete pipe
US2460602A (en) * 1945-05-04 1949-02-01 Goodrich Co B F Apparatus for film-type distillations
US2500900A (en) * 1946-11-21 1950-03-14 Goodrich Co B F Apparatus for film-type distillation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1284974A (en) * 1916-05-24 1918-11-19 Ohio Brass Co Strain-insulator.
US1895740A (en) * 1931-07-06 1933-01-31 Bozidar J Ukropina Method of making concrete pipe
US2032785A (en) * 1932-06-20 1936-03-03 Low Temperature Proc Company Method of and apparatus for disassociating the components of solutions and mixtures
US2306496A (en) * 1941-04-23 1942-12-29 Concrete Products Company Apparatus for forming lined concrete pipe
US2460602A (en) * 1945-05-04 1949-02-01 Goodrich Co B F Apparatus for film-type distillations
US2500900A (en) * 1946-11-21 1950-03-14 Goodrich Co B F Apparatus for film-type distillation

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180398A (en) * 1961-10-05 1965-04-27 Rodney Hunt Machine Co Thin film thermal processor
US3252502A (en) * 1962-01-19 1966-05-24 Allied Chem Centrifugal wiped film evaporation process for viscous materials
US3225817A (en) * 1963-03-23 1965-12-28 Huels Chemische Werke Ag Rotor for thin-layer vaporizers
US3251398A (en) * 1963-09-26 1966-05-17 Greenfield Charles Process for dehydrating waste solids concentrates
US3316958A (en) * 1964-04-22 1967-05-02 Henry Balfour And Company Ltd Film molecular stills and evaporators
US3334680A (en) * 1965-06-07 1967-08-08 Head Wrightson & Co Ltd Rotary wiped film evaporator
US3382158A (en) * 1966-04-01 1968-05-07 Bendix Corp Wiped film molecular still
US3349828A (en) * 1966-08-05 1967-10-31 Artisan Ind Rotary wiped film evaporator with annular ring for process material flow control
US3970510A (en) * 1973-09-03 1976-07-20 Yashima Chemical Engineering Co., Ltd. Method and apparatus for converting a liquid material into a powder
CN107617225A (zh) * 2017-10-18 2018-01-23 深圳佰思嘉科技有限公司 圆环式干燥机
WO2019076107A1 (zh) * 2017-10-18 2019-04-25 深圳佰思嘉科技有限公司 圆环式干燥机
CN107617225B (zh) * 2017-10-18 2020-05-12 深圳佰思嘉科技有限公司 圆环式干燥机
JP2020533558A (ja) * 2017-10-18 2020-11-19 シェンチェン バイスージア サイエンス アンド テクノロジー カンパニー リミテッドＳｈｅｎｚｈｅｎ Ｂａｉｓｉｊｉａ Ｓｃｉｅｎｃｅ Ａｎｄ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．， Ｌｔｄ． 環状式乾燥機

Also Published As

Publication number Publication date
BE566415A (ja)
FR1194059A (fr) 1959-11-06
DE1044764B (de) 1958-11-27
CH364243A (de) 1962-09-15
GB839793A (en) 1960-06-29
NL107997C (ja)

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