US4249485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed water preheater
Assignee: BBC BROWN BOVERI and Co Ltd
•
Filing: 1979-05-09
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Granted: 1981-02-10
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Expires: 1999-05-09
Abstract
Abstract A feed water preheater is disclosed having warm and cold tube bundles. The warm tube bundle is divided into first and second warm tube bundles with the first warm tube bundle forming a desuperheater bundle and the second warm tube bundle forming a condenser bundle. The first and second warm tube bundles are isolated with respect to one another with a steam distribution duct arranged between the warm and the cold tube bundles. Preferably, the warm and cold tube bundles are U-shaped with a steam inlet arranged perpendicularly with respect to the tube bundles.
Inventors
- 👤 Jakob Brul
- 👤 Helena Riegger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:38
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A feed water preheater, comprising: a warm tube bundle; a cold tube bundle; a steam distrubution duct arranged between the warm tube bundle and the cold tube bundle; the warm tube bundle being divided into first and second warm tube bundle portions, the first warm tube bundle portion forming a desuperheater bundle and the second warm tube bundle portion forming a condenser bundle; and means for isolating the desuperheater bundle from the condenser bundle.
Claim 2
Dependent Claim
74 words
A feed water preheater, comprising: a warm tube bundle; a cold tube bundle; a steam distrubution duct arranged between the warm tube bundle and the cold tube bundle; the warm tube bundle being divided into first and second warm tube bundle portions, the first warm tube bundle portion forming a desuperheater bundle and the second warm tube bundle portion forming a condenser bundle; and means for isolating the desuperheater bundle from the condenser bundle.
Claim 3
Dependent Claim
23 words
The feed water preheater of claim 1 further comprising: a condensate drain channel arranged between the first and second warm tube bundle portions.
Claim 4
Dependent Claim
25 words
The feed water preheater of claim 1 wherein the means for isolating the desuperheater bundle from the condenser bundle includes at least one support plate.
Claim 5
Dependent Claim
23 words
The feed water preheater of claim 1 wherein the cross sectional areas of the desuperheater bundle and the condenser bundle are approximately equal.
Claim 6
Dependent Claim
42 words
The feed water preheater of claim 2 further comprising: a plurality of radial baffle plates; and, collection means for conducting condensate away from the warm tube bundle, the collection means being provided between the condensate drain channel and the radial baffle plates.
Claim 7
Dependent Claim
16 words
The feed water preheater of claim 1 wherein the warm and cold tube bundles are U-shaped.
Claim 8
Dependent Claim
26 words
The feed water preheater of claim 6 further comprising: at least one steam inlet arranged perpendicularly with respect to a plane of the U-shaped tube bundles.
Claim 9
Dependent Claim
18 words
The feed water preheater of claim 1 wherein the desuperheater tube bundle has a generally rectangular cross section.
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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |