METHOD FOR REMOVING SCALE FROM GEOTHERMAL TURBINE BLADE AND METHOD FOR GEOTHERMAL POWER GENERATION

WIPO Patent Application WO/2022/181679

A1

Provided is a method for removing scale from turbine blades in a geothermal power generation system. The present method for removing scale from turbine blades is characterized in that an alkaline solution and a chelating solution are injected into geothermal steam that flows into a turbine during power generation, and geothermal scale formed on and adhered to turbine blades is removed by the injected solutions. The present removal method has improved scale removal effectiveness over conventional methods and makes it possible to remove, in a short amount of time, scale adhering to geothermal turbine blades. The present invention also makes it possible to provide a method for geothermal power generation in which scale is prevented from adhering to turbine blades, and a geothermal power generation system capable of operating continuously without performing cleaning in which a turbine is opened, even when geothermal steam containing 0.1 ppm or more of SiO2 and/or Cl is introduced into the turbine.

JP6567072	Turbine blades with shrouds with leak control
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JPH04224208	COLLECTIVE AIR EXTRACTING APPARATUS FOR STEAM TURBINE EQUIPMENT

HISHI YASUYUKI (JP)
KAWAKAMI NORIAKI (JP)
IKEI ANZU (JP)
HIRAYAMA SHUNICHI (JP)

PCT/JP2022/007569

September 01, 2022

February 24, 2022

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JAPAN METALS AND CHEMICALS CO LTD (JP)

F01D25/00; F01K9/00; F01K25/00; F03G4/00

WO2012144277A1

2012-10-26

JPS5885371A	1983-05-21
JP2013518179A	2013-05-20
JP2013043145A	2013-03-04

SHIRAKATA Yumiko (JP)

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