US2766193A - Apparatus for distilling or evaporating liquids - Google Patents

Apparatus for distilling or evaporating liquids Download PDF

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Publication number
US2766193A
US2766193A US345894A US34589453A US2766193A US 2766193 A US2766193 A US 2766193A US 345894 A US345894 A US 345894A US 34589453 A US34589453 A US 34589453A US 2766193 A US2766193 A US 2766193A
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United States
Prior art keywords
bearing
shaft
distillation
distilling
liquid
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Expired - Lifetime
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US345894A
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English (en)
Inventor
Schneider Rudolf
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Bayer AG
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Bayer AG
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Publication date
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    • 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
    • B01D1/223—In rotating vessels; vessels with movable parts containing a rotor
    • B01D1/225—In rotating vessels; vessels with movable parts containing a rotor with blades or scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/08—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs

Definitions

  • the present invention relates to apparatus for distilling or evaporating liquids in which a thin layer of liquid flows down the inside wall of a container, which is preferably heated from outside, and is distributed on the inside surface of the container by wipers, brushes or the like mounted on a rotating shaft.
  • the length of such an evaporator is preferably many times that of the diameter.
  • the stuffing box on the driving side of the apparatus becomes large and the construction expensive.
  • the arrangement of a step bearing fitted in the bottom of the apparatus likewise involves difliculties since the step bearing is arranged in a chamber which has a high temperature and in most cases it is not desired that lubricating oil or grease should come into the non-distilled product which discharges at the bottom.
  • the passage of the shaft through a stuliing box and an external bearing offers difliculties since the stufiing box and the shaft must be cold since otherwise condensation of the vapours and, accordingly, dilution of the residues occurs.
  • the present invention provides a means of overcoming the aforesaid difliculties in a simple manner by providing the rotating shaft of the evaporator with at least one bearing surface gliding on the inside surface of the container and having passages for the material flowing down the inside surfaces of the container.
  • the bearing surface is lubricated by the material flowing down.
  • the passages provided on the bearing surface of the shaft are preferably designed so as to form oblique lubricating grooves to insure a smooth conveyance especially as far as viscous materials are concerned.
  • Fig. 1 is a vertical section of a distilling or evaporating apparatus
  • Figs. 2, 3 and 4 are details of alternative travelling wheels forming part of the apparatus.
  • the apparatus illustrated comprises a feed pipe 1 for the liquid to be evaporated, a liquid distributor 2, an evaporator vessel 3, a heating jacket 4 of the evaporator, an outlet 5 for the non-evaporated residue, an outlet 6 for the vapour, which outlet is connected with a vacuum chamber (not shown in the drawing).
  • a hinged and States Patent 0 2,766,193 Patented Oct. 9, 1956 pivoted shaft 7 is provided with movable wipers and brushes 9 which brush the inside surface of the vessel 3 and distribute the liquid film.
  • a bearing surface shaped as a travelling wheel 10 which glides on the inside surface of the vessel and insures a centering of the shaft.
  • the travelling wheel 10 can be provided with peripheric, oblique lubricating grooves 11.
  • the travelling wheel may also be designed so as to leave only single segments 14 in wider spaces, as shown in Fig. 4.
  • the bearing surface need not be provided at the lower end of the shaft, but may be arranged in containers having a number of rows, between these rows. This construction has the advantage that, in the event of very viscous residues flowing down, the travelling wheel can be provided at the position at which the concentration of the material to be evaporated is not so high and therefore the material is prevented from getting blocked and sticking.
  • the shaft may either be machined of one piece or, preferably, can be separated below a stufling box 12 and connected through a coupling (Fig. 1) which provides so much play that the shaft does not weigh on one side of the travelling wheel 10.
  • the coupling can be shaped like a bayonet so as to allow of removing the shaft provided with the wipers and travelling wheels at the bottom after detaching the bottom.
  • an apparatus for the distillation and evaporation of liquids having an inner distillation surface of circular cross section and wiping means mounted on a rotatable, axially positioned central shaft for spreading a thin film of the liquid to be treated over the inner distillation surface
  • the improvement which comprises a bearing connected to said shaft having an outer hearing surface extending in a plane substantially parallel to the plane of the adjacent portion of the inner distillation surface and in bearing contact therewith, said hearing surface defining interruptions extending throughout the axial width thereof to define passages for the passage of liquid therethrough.
  • said bearing is a wheel shaped bearing having a cylindrical outer bearing surface.
  • said bearing is a segmented wheel with the segmented portions thereof having an outer bearing surface in bearing contact with the inner distillation surface.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
US345894A 1952-04-07 1953-03-31 Apparatus for distilling or evaporating liquids Expired - Lifetime US2766193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE310815X 1952-04-07

Publications (1)

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US2766193A true US2766193A (en) 1956-10-09

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US345894A Expired - Lifetime US2766193A (en) 1952-04-07 1953-03-31 Apparatus for distilling or evaporating liquids

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US (1) US2766193A (enrdf_load_html_response)
CH (1) CH310815A (enrdf_load_html_response)
FR (1) FR1074346A (enrdf_load_html_response)
GB (1) GB740561A (enrdf_load_html_response)
NL (2) NL79725C (enrdf_load_html_response)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955990A (en) * 1956-03-15 1960-10-11 Arthur F Smith Distilling apparatus and method
US3020211A (en) * 1958-11-28 1962-02-06 Arthur F Smith Film-forming and wiping distillation process and apparatus for carrying out the same
US3060107A (en) * 1958-08-11 1962-10-23 Arthur F Smith Thin film distillation apparatus
US3090732A (en) * 1958-05-07 1963-05-21 Bayer Ag Construction and arrangement of wipers in thin-film evaporators
US3190817A (en) * 1957-08-12 1965-06-22 Gen Electric Compression distillation apparatus
US3252502A (en) * 1962-01-19 1966-05-24 Allied Chem Centrifugal wiped film evaporation process for viscous materials
US3253643A (en) * 1963-03-18 1966-05-31 Arne R Gudheim Horizontally axised evaporator of the rotary wiped thin film type
US3428530A (en) * 1965-09-10 1969-02-18 Rhone Poulenc Sa Process for the purification of chlorosilanes by distillation and thin-film evaporation
US20040144405A1 (en) * 2001-05-02 2004-07-29 Garrick David Stephen Apparatus and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2040837A (en) * 1932-02-18 1936-05-19 Yarmett Edward C D Method of heat-treating liquids
US2403978A (en) * 1944-09-12 1946-07-16 Distillation Products Inc Vacuum distillation apparatus
US2578086A (en) * 1948-06-09 1951-12-11 Eastman Kodak Co High-vacuum fractionating distillation apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2040837A (en) * 1932-02-18 1936-05-19 Yarmett Edward C D Method of heat-treating liquids
US2403978A (en) * 1944-09-12 1946-07-16 Distillation Products Inc Vacuum distillation apparatus
US2578086A (en) * 1948-06-09 1951-12-11 Eastman Kodak Co High-vacuum fractionating distillation apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955990A (en) * 1956-03-15 1960-10-11 Arthur F Smith Distilling apparatus and method
US3190817A (en) * 1957-08-12 1965-06-22 Gen Electric Compression distillation apparatus
US3090732A (en) * 1958-05-07 1963-05-21 Bayer Ag Construction and arrangement of wipers in thin-film evaporators
US3060107A (en) * 1958-08-11 1962-10-23 Arthur F Smith Thin film distillation apparatus
US3020211A (en) * 1958-11-28 1962-02-06 Arthur F Smith Film-forming and wiping distillation process and apparatus for carrying out the same
US3252502A (en) * 1962-01-19 1966-05-24 Allied Chem Centrifugal wiped film evaporation process for viscous materials
US3253643A (en) * 1963-03-18 1966-05-31 Arne R Gudheim Horizontally axised evaporator of the rotary wiped thin film type
US3428530A (en) * 1965-09-10 1969-02-18 Rhone Poulenc Sa Process for the purification of chlorosilanes by distillation and thin-film evaporation
US20040144405A1 (en) * 2001-05-02 2004-07-29 Garrick David Stephen Apparatus and method

Also Published As

Publication number Publication date
NL79725C (enrdf_load_html_response)
FR1074346A (fr) 1954-10-05
GB740561A (en) 1955-11-16
CH310815A (de) 1955-11-15
NL175983B (nl)

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