Shell and tube heat exchanger

An improved shell and tube heat exchanger is described wherein power steam for driving a turbine is reheated between successive stages of the turbine. The power steam passing through the shell is heated by heating steam passing through heating tubes, the exchanger being of the type having steam dist...

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Bibliographische Detailangaben
Hauptverfasser:	OPITZER, RUDOLF
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING LIGHTING MECHANICAL ENGINEERING STEAM GENERATION SUPERHEATING OF STEAM TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS WEAPONS
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Beschreibung
Zusammenfassung:	An improved shell and tube heat exchanger is described wherein power steam for driving a turbine is reheated between successive stages of the turbine. The power steam passing through the shell is heated by heating steam passing through heating tubes, the exchanger being of the type having steam distribution elements including a main inlet header adapted to distribute heating steam to the heating tubes, a main outlet header located to collect the heating steam from the heating tubes, a plurality of pairs of inlet and outlet subheaders, feeder tubes for coupling each of the inlet and outlet subheaders to the main inlet header and main outlet header respectively, and heating tubes coupling the inlet and outlet subheaders of each pair. The heat exchanger is characterized by an improved arrangement of the distribution elements to provide improved allocation of the heating steam to uniformly heat power steam of varying moisture distribution and hence different local heat transfer requirements, without developing degenerative heat transfer conditions.