| 摘要 |
PURPOSE:To improve the thermal efficiency of a plant by a method wherein a low pressure water supply heater is additionally installed at the lower temperature side part than a water supply heater, then the heat recovery is performed by introducing water drops and an operational steam from the preceding position of the last stage to a low pressure water supply heater. CONSTITUTION:A steam is introduced from an extracting port 10 at the upstream side of a preceding stage static blade (or an injecting port) 8 of the last stage in an atomic power generation low pressure turbine 1 to a water supply heater 3 in an atomic power generation plant and the like. Meanwhile, in addition to said steam, water drops distributed at the outer periphery of a blade line by the centrifugal force due to the turbine rotation are extracted together with the steam from an extracting port 11 at the preceding position of a static blade 7 of the last stage. A low pressure water supply heater 4 is increased between a condenser 2 and a water supply heater 3, that is, at the lower temperature side of the water supply heater 3. The water drops and steam are introduced into the lower temperature water supply heater 4 from the extracting port 11. Thereby, the water drops and operational steam are utilized for the heat recovery, accordingly, the thermal efficiency of the plant can be improved. |
