Patent US3921709A successfully refreshed from Google Patents.
US3921709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indirect heat treatment of liquids
Assignee: LIQUID PROCESSING AB
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Filing: 1974-01-15
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Granted: 1975-11-25
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Expires: 1994-01-15
Abstract
Abstract An apparatus for indirect heat treatment of liquids, especially an evaporator, comprising a frusto-conical hollow rotor mounted for rotation in a vacuum-tight casing and having three spaced substantially coextensive walls for defining two interconnected gaps for passing a heat carrier through the rotor to heat the liquids being distributed and flowing as a thin layer on the inner wall of the rotor under the centrifugal action of the rotating rotor.
Inventors
- 👤 Vaclav Feres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:12
CPC Classifications
F; F28; F28D; F28D11/00; F28D11/02; B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/147
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
314 words
An apparatus for indirect heat treatment of a liquid comprising a vacuum-tight casing, a substantially frusto-conical rotor body mounted for rotation in said casing, said rotor including a central supporting hub means, a frusto-conical supporting partition wall, a frusto-conical outer wall, and a substantially frusto-conical inner wall constituting an inner rotation-symmetrical heat exchange surface on said rotor body, said partition wall being connected at its narrow end to said hub means, said outer wall being connected at its narrow end in a rotary and fluid-tight manner to said vacuum-tight casing and said inner wall being connected at its narrow end in a fluidtight manner to said central hub means, said partition, said outer and said inner walls being interconnected at their wider ends, and said inner wall and said partition, and said partition and said outer wall being spaced apart to form gaps therebetween permitting flow of heat carrier fluid therethrough, apertures in said partition wall interconnecting the gaps on each side of said partition wall at least at their outer ends near the wider end of said rotor body, said hub means having aT least one channel which opens into the gap between said inner and said partition wall means to permit flow of the heat-carrier fluid therethrough, a drive shaft supported with one end cantilevered into said vacuumtight casing and supporting said rotor body for rotation therewith, motor means connected to the other end of said shaft for rotating said shaft and said rotor body, a connecting header mounted on said vacuum-tight casing and having inlet and outlet conduits for the heat-carrier fluid, said inlet and outlet conduits being connected to said gaps in said rotor body, inlet means arranged to direct the liquid to be treated into said vacuum-tight chamber and onto the exposed surface of said inner wall near its narrow end, and outlet means for the heat treated liquid.
Claim 2
Independent Claim
314 words
An apparatus for indirect heat treatment of a liquid comprising a vacuum-tight casing, a substantially frusto-conical rotor body mounted for rotation in said casing, said rotor including a central supporting hub means, a frusto-conical supporting partition wall, a frusto-conical outer wall, and a substantially frusto-conical inner wall constituting an inner rotation-symmetrical heat exchange surface on said rotor body, said partition wall being connected at its narrow end to said hub means, said outer wall being connected at its narrow end in a rotary and fluid-tight manner to said vacuum-tight casing and said inner wall being connected at its narrow end in a fluidtight manner to said central hub means, said partition, said outer and said inner walls being interconnected at their wider ends, and said inner wall and said partition, and said partition and said outer wall being spaced apart to form gaps therebetween permitting flow of heat carrier fluid therethrough, apertures in said partition wall interconnecting the gaps on each side of said partition wall at least at their outer ends near the wider end of said rotor body, said hub means having aT least one channel which opens into the gap between said inner and said partition wall means to permit flow of the heat-carrier fluid therethrough, a drive shaft supported with one end cantilevered into said vacuumtight casing and supporting said rotor body for rotation therewith, motor means connected to the other end of said shaft for rotating said shaft and said rotor body, a connecting header mounted on said vacuum-tight casing and having inlet and outlet conduits for the heat-carrier fluid, said inlet and outlet conduits being connected to said gaps in said rotor body, inlet means arranged to direct the liquid to be treated into said vacuum-tight chamber and onto the exposed surface of said inner wall near its narrow end, and outlet means for the heat treated liquid.
Claim 3
Dependent Claim
86 words
An apparatus as claimed in claim 1, wherein the stationarily mounted head of the casing has a stationary inner flow conduit for the heat carrier, which is connected to the channel or channels of the supporting hub through which the heat carrier is intended to flow and which is sealed against the supporting hub around said hub or the channels thereof, and a stationary outer flow conduit for the heat carrier, which is sealed against the outer wall of the rotor body and the vacuum-tight casing.
Claim 4
Dependent Claim
37 words
An apparatus as claimed in claim 2, wherein the outer flow conduit is sealed against the outer wall of the rotor body and the vacuum-tight casing by means of a mechanical seal operating with a flushing liquid.
Claim 5
Dependent Claim
31 words
An apparatus as claimed in claim 1, wherein said partition wall has through holes distributed over the surface of said partition and interconnecting the two inner gaps of the rotor body.
Claim 6
Dependent Claim
39 words
An apparatus as claimed in claim 1, wherein the entire rotor body is welded to form a continuous unit and wherein, the conical inner wall of the rotor body is connected to the supporting hub via a dilation device.
Claim 7
Dependent Claim
79 words
An apparatus as claimed in claim 1 wherein the rotor body at its large end has an inwardly directed flange to form an annular collecting gutter for liquid to be subjected to heat treatment, said liquid being supplied at the hub of the rotor body and allowed to flow along the inner side of said rotor body in an outward direction, the outlet for said liquid being in the form of a scoop pipe inserted in said collecting gutter.
Claim 8
Dependent Claim
21 words
An apparatus as claimed in claim 1, wherein a preheater for the liquid being treated is provided in the vacuum-tight casing.
Claim 9
Dependent Claim
25 words
An apparatus as claimed in claim 1, wherein a condenser and/or cooler for substances separated from the heat-treated liquid is provided in the vacuum-tight casing.
Claim 10
Dependent Claim
41 words
An apparatus as claimed in claim 7, wherein the rotor body is arranged with its large base end turned downwards, and the preheater and, respectively, the condenser and/or the cooler is provided within and optionally extends downwards beneath the rotor body.
Claim 11
Dependent Claim
37 words
An apparatus as claimed in claim 8, wherein the rotor body is arranged with its large base end turned upwards, and the preheater and respectively, the condenser and/or cooler is provided radially outwardly of the rotor body.
Claim 12
Dependent Claim
33 words
An apparatus as claimed in claim 10, wherein a stationary scoop pipe for the heat carrier is provided in the annular gap of the rotor body between the partition and the outer wall.
Claim 13
Dependent Claim
29 words
An apparatus as claimed in claim 11, wherein the preheater for the treated liquid is a pipe coil extending about the rotor body outside of the large end thereof.
Claim 14
Dependent Claim
28 words
An apparatus as claimed claim 12, wherein the condenser and/or the cooler is arranged about the rotor body in the area of and above the small end thereof.
Claim 15
Dependent Claim
27 words
An apparatus as claimed in claim 13, wherein the condenser and/or the cooler is shielded against heat radiation from the rotor body by means of a screen.
Claim 16
Dependent Claim
43 words
An apparatus as claimed in claim 1, wherein the drive is mounted on the concave side of the rotor body, and the inlet and outlet means for the heat carrier are connected to the rotor body from the convex side of saId body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |