PREVENTING METHOD OF DUST ADHERENCE TO BLADE SURFACE OF AXIAL FLOW TURBINE

摘要

PURPOSE:To prevent adherence of dust to a blade surface, by always coating the blade surface of a stationary blade in an axial flow turbine with fluid. CONSTITUTION:In a stationary blade 11 of the first stage, fluid is supplied from the outside via a pipe line 17 and throttle valve 41, flowing in a communication pipe line 20, and jetted from fine holes 311-315, 321-325, 331-335 to places 11a, 11b, 11c, to which dust easily adheres, in this way, dusts A, B, C can be prevented from adhering. Accordingly, generation of vibration, damage of a blade, etc., conventionally resulting from adherence of the dust to a blade surface in an axial flow turbine 5, recovering energy of exhaust gas from a blast furnace 1, can be prevented.