SCALE ADHESION PREVENTING METHOD FOR GEOTHERMAL STEAM TURBINE NOZZLE BLADE

摘要

PURPOSE: To remove the scale deposited and stuck on the cooling water passage of each nozzle blade preventing the scale on the surface of the nozzle blade of a geothermal steam turbine, sufficiently cool the nozzle blade, and prevent the adhesion of the scale on the surface. ;CONSTITUTION: A flexible hose 11 injecting high-pressure water from the tip, a wire having a scraper, or a sheath heater excited intermittently is inserted into a cooling water passage 7 provided in a nozzle blade 1, and the scale deposited and stuck on the cooling water passage 7 is removed.;COPYRIGHT: (C)1996,JPO