THERMAL STRESS CONTROL DEVICE FOR STEAM TURBINE PLANT

PURPOSE:To reduce fatigue of apparatus due to thermal stress by detecting the distribution of temperatures in apparatus for use in a turbine to calculate the thermal stress in apparatus based on detection signals, and controlling main steam temperatures so as to restrict the thermal stress to a pres...

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Bibliographische Detailangaben
1. Verfasser:	OMORI TATSURO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METHODS OF STEAM GENERATION NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ACCUMULATORS STEAM BOILERS STEAM ENGINE PLANTS STEAM ENGINES STEAM GENERATION WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To reduce fatigue of apparatus due to thermal stress by detecting the distribution of temperatures in apparatus for use in a turbine to calculate the thermal stress in apparatus based on detection signals, and controlling main steam temperatures so as to restrict the thermal stress to a preset value. CONSTITUTION:A high-temperature steam generated in a boiler 1 is introduced through a main steam stop valve 2 and a main steam control valve 3 into a main steam turbine 4 after it is supplied to a final heater 17. On the other hand, a steam finished its work in the steam turbine 4 is again supplied to the boiler 1 by a condensate pump 8 after it is condensed in a condenser 7. In this case, the temperature on each internal and external surface of each valve 2, 3 is detected by each temperature detector 10a, 10b, and the detection signals are inputted through each subtracter 11a, 11b to a control device 12. The temperature in the steam turbine is also detected by a temperature detector 10c, and the detection signal is inputted to the control device 12. Further, the control device 12 controls a bypass feed water flow control valve 16.