Analysis and Solutions of High Governing Stage Pressure Problem for 600-MW Steam Turbines

doi:10.11930/j.issn.1004-9649.2013.1.50.3

Abstract

Abstract: The governing stage pressure of a supercritical steam turbine has been increasing since the unit commitment. During the overhaul, scaling is discovered on the turbine blades, which seriously influences the turbine operated at rated load. The analysis on the deposits finally discloses the reasons for scaling. Some measures such as shotpeening for the HP and IP flow paths, acid washing for the boiler and defect elimination for the water precision treatment equipment, are taken, which enables the turbine governing stage pressure to drop to the designed value and the turbine to carry the rated load. Therefore, the problem of high governing stage pressure is solved thoroughly.

Key words: supercritical unit, governing stage pressure, scaling, quality of water and steam

CLC Number:

TK263.3

CHEN Bin, TANG Hai-ning, XU Chen-guang. Analysis and Solutions of High Governing Stage Pressure Problem for 600-MW Steam Turbines[J]. Electric Power, 2013, 46(1): 50-53.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.1.50.3

https://www.electricpower.com.cn/EN/Y2013/V46/I1/50

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Analysis and Solutions of High Governing Stage Pressure Problem for 600-MW Steam Turbines

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