F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
60/50, 60/55
F01D 13/02 (2006.01) F01K 7/34 (2006.01) F01K 7/40 (2006.01)
Patent
CA 1139958
ABSTRACT OF THE DISCLOSURE The present invention relates to a method and apparatus for feedwater heating in an industrial steam turbine. Process steam for industrial purposes is extracted from at least one stage of a multistage turbine. An expansion of a portion of process steam is provided to decrease the steam pressure to a lower pressure level than that of the lowest process steam network. The further expanded steam is used for heating the feedwater which consists of recirculated condensate and makeup water. The portion of the process steam is preferably expanded in a further turbine stage connected downstream from the last turbine stage of the multistage turbine from which process steam is extracted. At least one further feedheater with lower pressure is also provided to receive the expanded portion of the steam.
339233
Limited Bbc Brown Boveri & Company
Swabey Ogilvy Renault
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