Process and apparatus for the erosion-corrosion protection of steam ducts from the high pressure stage of a turbine

摘要

Process for the protection against erosion-corrosion of ducts for transporting steam from the high-pressure stage (1) of a bleeder-steam turbine of a power station to bodies (34, 36, 38) of its low-pressure stage on the one hand and to heaters (22A, 23A) on the other hand, in which most of the water contained in the bleeds and the wet-steam outlets is separated by centrifuging (40, 41), a first fraction of the partially dried steam is superheated and/or dried completely (28 to 33) and is then introduced into the bodies (34, 36, 38) of the low-pressure stage, and an additional fraction of partially dried steam is transferred to the heaters (22A, 23A). The two steam fractions are subjected jointly to drying by centrifuging (40, 41), and the additional fraction is subjected to final drying by centrifuging (6A, 7A). …IMAGE…