US2523042A - Rotor for centrifugal stills - Google Patents
Rotor for centrifugal stills Download PDFInfo
- Publication number
- US2523042A US2523042A US730126A US73012647A US2523042A US 2523042 A US2523042 A US 2523042A US 730126 A US730126 A US 730126A US 73012647 A US73012647 A US 73012647A US 2523042 A US2523042 A US 2523042A
- Authority
- US
- United States
- Prior art keywords
- rotor
- centrifugal
- aluminum
- thickness
- metal
- 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
Links
Images
Classifications
-
- 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
- This invention relates to animproved apparatus for vacuum distillation of thermally decomposable substances while in .the form of a thin film and particularly to a rotating vaporizing surface which will have uniform temperature.
- lT-his invention has for its object to avoid a portion of the decomposition which takes place in centrifugal highvacuum "unobstructed-path distillation. Another object is to provide an improvedvaporizing surface for a centrifugal, highvacuum, unobstructed-path still. A further object is to provide a vaporizing surface for a centrifugal, high-vacuum, unobstructed-path still in whic'h the surface temperatureis nearly uniform at all points. Another 'object'isto improve the state of the art; Other obje-cts'will' appear hereinafter.
- Vacuum distillation apparatus wherein a rotatable vaporizing surface is constructedrin comparatively thick form of a metal of high .thermal conductivity.
- Comiparatively massive construction for example, heavy construction considerably in excess of the scale required in ord'er "for the rotor to have sufficient structural strength to function without breakdowmprovides a metal heat-reservoir whichgives the rotor, or vaporizing surface, a more uniform surface temperature than is the case where a thin metal rotor -.is used.
- Fig. l is a partial top view of the rotorshown in-cross section in Fig. 2.
- Fig. 2 is a sectional viewof .a rotorused in a small centrifugal still.
- Fig. 3 is a sectional view of a cup-shaped rotor of a type used in a large centrifugal still.
- numeral Ill desig nates the flat .area on which work liquid (not shown) is introduced.
- Numeral 'll designates the area from which vaporization takes place.
- Numeral I2 designates the center hole which is used to secure the rotor to the shaft (not shown). on which it rotates.
- In'thepast rotors were made of aluminum or steel spinnings. A thin sheet of metal wasattached to a vwood or metal chuck of the shape desired for the rotor. The chuck was then. r0 tated and a tool held against the spinning metal until it conformedto the contours of the chuck. A very thin sheet of metal was used as it was easy to work into shape and offered less re-. sistance .tothe flow of heat from the heating element'located beneath the rotor.
- thermal conductivity is usuually expressed as the B. t. u.s which will flow through a cubic foot of the metal in an hour where the temperature differential on two opposing sides is 1 F. The coefficient varies slightly at various temperatures.
- the following table of thermal conductivity coeflicients at 212 F. is
- the rotor thickness at the vaporizing surface will be as much as 1 /2 inches, that is, the ratio of the thickness to the diameter is 1/80.
- a medium-size rotor e. g. in diameter
- Combinations of metals of high thermal conductivity may be used.
- copper is a very desirable material of construction but it has a destructive effect upon certain vitamins.
- Silver is a desirable material of construction but it is expensive.
- a rotor constructed of copper with a silver coating would be comparatively inexpensive and would have excellent performance characteristics.
- Alloys may be used provided their coeiiicient of thermal conductivity is sufficiently high.
- An alloy with a coefficient of 90 (B. t. u./(hr.) (sq. ft.) (F. per ft.)) or better would be substantially as effective as magnesium,
- the surface area was the same for both the steel and aluminum rotors used in the test but the aluminum rotor was thicker.
- the loss is approximately 16% as opposed to a 33% loss on a steel rotor.
- Other improvements are decreased power consumption, less vibration, reduced and more uniform charring on the distillation surface, and easier cleaning.
- the concentrate is of improved quality and is sufficiently bland to use in margarine fortification.
- an aluminum rotor at least 30 inches in diameter and having a wall thickness in the region of the vaporizing surface at least of the diameter of the rotor, which thickness is substantially greater than the wall thickness necessary for structural strength.
- an aluminum rotor having a diameter of 30 to 120 inches and a wall thickness in the region of the vaporizing surface of /120 to /60 the diameter of said rotor with the minimum thickness being not less than inch and the maximum thickness not more than 1 /2 inches, which wall thickness is substantially greater than the wall thickness necessary for structural strength of said rotor.
- a cast aluminum rotor having a diameter not less than about 60 inches and a wall thickness in the region of the vaporizing surface of at least /120 the diameter of said rotor, which thickness is substantially greater than the wall thickness necessary for structural strength.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Centrifugal Separators (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR961538D FR961538A (US06265458-20010724-C00056.png) | 1947-02-21 | ||
US730126A US2523042A (en) | 1947-02-21 | 1947-02-21 | Rotor for centrifugal stills |
GB3611/48A GB644631A (en) | 1947-02-21 | 1948-02-07 | Improvements in or relating to rotors for centrifugal stills |
DEE2984A DE871296C (de) | 1947-02-21 | 1950-10-01 | Rotoren fuer Zentrifugal-Destillierapparate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US730126A US2523042A (en) | 1947-02-21 | 1947-02-21 | Rotor for centrifugal stills |
Publications (1)
Publication Number | Publication Date |
---|---|
US2523042A true US2523042A (en) | 1950-09-19 |
Family
ID=24934023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US730126A Expired - Lifetime US2523042A (en) | 1947-02-21 | 1947-02-21 | Rotor for centrifugal stills |
Country Status (4)
Country | Link |
---|---|
US (1) | US2523042A (US06265458-20010724-C00056.png) |
DE (1) | DE871296C (US06265458-20010724-C00056.png) |
FR (1) | FR961538A (US06265458-20010724-C00056.png) |
GB (1) | GB644631A (US06265458-20010724-C00056.png) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5334290A (en) * | 1990-11-21 | 1994-08-02 | Expanchimie S.A.R.L. | Molecular distillation apparatus having induction-heating |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2343667A (en) * | 1941-09-17 | 1944-03-07 | Distillation Products Inc | Centrifugal still |
-
0
- FR FR961538D patent/FR961538A/fr not_active Expired
-
1947
- 1947-02-21 US US730126A patent/US2523042A/en not_active Expired - Lifetime
-
1948
- 1948-02-07 GB GB3611/48A patent/GB644631A/en not_active Expired
-
1950
- 1950-10-01 DE DEE2984A patent/DE871296C/de not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2343667A (en) * | 1941-09-17 | 1944-03-07 | Distillation Products Inc | Centrifugal still |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5334290A (en) * | 1990-11-21 | 1994-08-02 | Expanchimie S.A.R.L. | Molecular distillation apparatus having induction-heating |
Also Published As
Publication number | Publication date |
---|---|
GB644631A (en) | 1950-10-18 |
FR961538A (US06265458-20010724-C00056.png) | 1950-05-13 |
DE871296C (de) | 1953-03-23 |
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