US5419810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin-film evaporator made of a corrosion resistant material
Assignee: Buss AG
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Filing: 1992-04-16
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Granted: 1995-05-30
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Expires: 2012-04-16
Abstract
Abstract The invention relates to a thin-film evaporator equipped with a heatable tubular evaporator body in whose product charged interior a driven rotor is disposed which is equipped with essentially radially oriented vanes. The invention is formed from an evaporator body of at least one thick-wall graphite tube with a plurality of essentially axially extending bores disposed in the tube walls, each one of the bores open at the tube ends into an annular channel which is in communication with a connecting pipe stub for a heating medium. Since the treatment of corrosive media, for example acids charged with solids, places high demands on corrosion resistance of the materials employed and additionally high demands for accuracy of the work, it is proposed to form the evaporator body (1) of at least one thick-wall graphite tube (2); to dispose a plurality of essentially axially extending bores (14) in the tube walls; and to have each one of the bores (14) open at the tube ends into an annular channel (15, 16) which is in communication with a connecting pipe stub (6, 9) for a heating medium.
Inventors
- 👤 Rolf van der Piepen
- 👤 Lothar Weimann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:43
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/223; B01D1/225; F; F28; F28F; F28F21/00; F28F21/02; Y; Y10; Y10S; Y10S159/00; Y10S159/15; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
256 words
A heatable thin-film evaporator, comprising: an externally driven rotor with essentially radially oriented vanes disposed in a tubular evaporator body; the evaporator body, including at least one thick-walled graphite tube having a first end face and a second end face, a plurality of bores extending essentially axially between the first and second end faces, a first clamping ring having a first edge and a second edge, the first edge including a first open groove annular channel, the first end face of the evaporator body being coupled to the first clamping ring so that the plurality of bores open into the first open groove annular channel; a second clamping ring having a first edge and a second edge, the first edge including a second open groove annular channel in the first edge, the first edge of the second clamping ring coupled to the second end face of the evaporator body so that the plurality of bores open into the second open groove annular channel; a plurality of tension rods, each tension rod having a first end coupled to the first clamping ring and a second end coupled to the second clamping ring by a spring arrangement so that the first and second end faces of the tube are held in a sealing manner between the first and second clamping rings; a first connecting pipe, in communication with the first open groove annular channel, for carrying a heating medium; and a second connecting pipe, in communication with the second open groove annular channel, for carrying the heating medium.
Claim 2
Dependent Claim
256 words
A heatable thin-film evaporator, comprising: an externally driven rotor with essentially radially oriented vanes disposed in a tubular evaporator body; the evaporator body, including at least one thick-walled graphite tube having a first end face and a second end face, a plurality of bores extending essentially axially between the first and second end faces, a first clamping ring having a first edge and a second edge, the first edge including a first open groove annular channel, the first end face of the evaporator body being coupled to the first clamping ring so that the plurality of bores open into the first open groove annular channel; a second clamping ring having a first edge and a second edge, the first edge including a second open groove annular channel in the first edge, the first edge of the second clamping ring coupled to the second end face of the evaporator body so that the plurality of bores open into the second open groove annular channel; a plurality of tension rods, each tension rod having a first end coupled to the first clamping ring and a second end coupled to the second clamping ring by a spring arrangement so that the first and second end faces of the tube are held in a sealing manner between the first and second clamping rings; a first connecting pipe, in communication with the first open groove annular channel, for carrying a heating medium; and a second connecting pipe, in communication with the second open groove annular channel, for carrying the heating medium.
Claim 3
Dependent Claim
38 words
A thin-film evaporator according to claim 1, wherein the first clamping ring is configured as a head ring and is provided with an inlet pipe for a product to be treated and with a discharge pipe for vapors.
Claim 4
Dependent Claim
21 words
A thin-film evaporator according to claim 1, where the second clamping ring is provided with an inwardly projecting circumferential, conical collar.
Claim 5
Dependent Claim
40 words
A thin-film evaporator according to claim 1, wherein the first clamping ring and the second clamping ring are made of metal, and each clamping ring being provided with a corrosion resistant coating on an inner surface of the clamping ring.
Claim 6
Dependent Claim
24 words
A thin-film evaporator according to claim 1, wherein the rotor has a core tube and wherein the vanes are fastened to the core tube.
Claim 7
Dependent Claim
52 words
A thin-film evaporator according to claim 5, wherein the vanes are formed from at least three curved thin plates, each plate having longitudinal edges and a peak region, the plates lying against one another along their respective longitudinal edges, and each plate being fastened to the core tube at its peak region.
Claim 8
Dependent Claim
25 words
A thin-film evaporator according to claim 1, wherein the rotor has a periphery provided with removable corrosion resistant edge elements rigidly connected with the rotor.
Claim 9
Dependent Claim
31 words
A thin-film evaporator according to claim 7, wherein the rotor includes a rotor body formed from graphite, and the removable corrosion resistant edge elements being rigidly connected to the rotor body.
Claim 10
Dependent Claim
18 words
A thin-film evaporator according to claim 5, wherein the core tube and the vanes are formed from graphite.
Claim 11
Dependent Claim
19 words
A thin-film evaporator according to claim 5, wherein the core tube is composed of a carbon fiber reinforced material.
Claim 12
Dependent Claim
18 words
A thin-film evaporator according to claim 10, wherein the vanes are composed of a carbon fiber reinforced material.
Claim 13
Dependent Claim
31 words
A thin-film evaporator according to claim 7, wherein the rotor includes a rotor body formed from graphite, and the removable corrosion resistant edge elements being movably connected to the rotor body.
Claim 14
Dependent Claim
25 words
A thin-film evaporator according to claim 1, wherein the rotor includes a periphery provided with removable corrosion resistant edge elements movably connected with the rotor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |