EP 0720714 B1 19980325 - Steam boiler of once-through type and process for operating the same
Title (en)
Steam boiler of once-through type and process for operating the same
Title (de)
Durchlaufdampferzeuger und Verfahren zu dessen Betrieb
Title (fr)
Chaudière à vapeur du type à circulation ouverte, et procédé de faire fonctionner une telle chaudière
Publication
Application
Priority
- DE 9401086 W 19940919
- DE 4333404 A 19930930
Abstract (en)
[origin: WO9509325A1] In order to avoid the inconvenience that results from a faulty heating of individual pipes (10) of a steam generator (2) with vertical pipes arranged in the combustion chamber, the mass flow density m in the pipes (10) is set below a predetermined maximum value (curve B) which depends on the inner diameter d of the used pipes. In order to avoid inadmissibly high pipe wall temperatures even at the proximity of a critical pressure of about 200 to 221 bars, the inner surface of each pipe (10) is further provided with a surface structure that causes a high turbulence and/or a longitudinal vortex in the flowing medium. The components of the flowing medium are thus intimately mixed so that a good heat transmission is achieved.
IPC 1-7
IPC 8 full level
F22B 21/02 (2006.01); F22B 37/10 (2006.01); F22B 37/12 (2006.01); F28F 1/40 (2006.01); F28F 13/02 (2006.01)
CPC (source: EP KR US)
F22B 37/10 (2013.01 - KR); F22B 37/103 (2013.01 - EP US); F28F 1/40 (2013.01 - EP KR US); F28F 13/02 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
DE 4333404 A1 19950406; CN 1132548 A 19961002; DE 59405540 D1 19980430; EP 0720714 A1 19960710; EP 0720714 B1 19980325; JP H09503284 A 19970331; KR 960705177 A 19961009; RU 2123634 C1 19981220; US 5706766 A 19980113; WO 9509325 A1 19950406
DOCDB simple family (application)
DE 4333404 A 19930930; CN 94193594 A 19940919; DE 59405540 T 19940919; DE 9401086 W 19940919; EP 94926796 A 19940919; JP 51004795 A 19940919; KR 19960701726 A 19960330; RU 96108253 A 19940919; US 62777996 A 19960401