EP 0544615 B1 19960508 - Method of operating a once-through steam generator with low load recirculation
Title (en)
Method of operating a once-through steam generator with low load recirculation
Title (de)
Verfahren zum Betrieb eines Zwangdurchlaufdampferzeugers mit Schwachlastumwälzung
Title (fr)
Méthode de fonctionnement d'un générateur de vapeur à passage unique et à recirculation à faible charge
Publication
Application
Priority
CH 348891 A 19911128
Abstract (en)
[origin: EP0544615A1] The steam generator has a feed pump (5), an economiser (1), an evaporator (2), a water separator (3) and at least one superheater (4), as well as a circulation pipe (20) connected to the water outlet of the separator (3) and opening into the working medium flow between feed pump and economiser. Arranged between the mouth (19) of the circulation pump (20) and the economiser (1) is a circulation pump (23), as well as, behind the latter, a level control valve (24). The method for operating this steam generator consists in that, above a minimum flow-through quantity of the economiser (1), the feed quantity is adjusted depending upon the steam temperature downstream of the water separator (3) and that, below the minimum flow-through quantity of the economiser (1), the water level in the water separator (3) is regulated by operating the level control valve (24) arranged between the circulation pump (23) and the economiser (1). As a result, the otherwise usual switching from the steam temperature regulation to the water level regulation, which likewise acts on the feed water supply, and vice versa, is no longer necessary. <IMAGE>
IPC 1-7
IPC 8 full level
F22B 35/10 (2006.01)
CPC (source: EP KR)
F22B 35/00 (2013.01 - KR); F22B 35/101 (2013.01 - EP)
Designated contracting state (EPC)
BE DE DK
DOCDB simple family (publication)
EP 0544615 A1 19930602; EP 0544615 B1 19960508; DE 59206231 D1 19960613; DK 0544615 T3 19960916; KR 100249721 B1 20000401; KR 930010432 A 19930622; TW 212826 B 19930911
DOCDB simple family (application)
EP 92810857 A 19921105; DE 59206231 T 19921105; DK 92810857 T 19921105; KR 920021592 A 19921118; TW 81107297 A 19920916