Analysis of Different Reconstruction Technology for Heating Supply with High Back Pressure of 135MW Grade Steam Turbine

doi:10.3969/J.ISSN.2095-3429.2017.05.011

Power Generation Technology ›› 2017, Vol. 38 ›› Issue (5): 45-50.DOI: 10.3969/J.ISSN.2095-3429.2017.05.011

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Analysis of Different Reconstruction Technology for Heating Supply with High Back Pressure of 135MW Grade Steam Turbine

LIU Guangyao¹, WANG Xuedong¹, SONG Ang², LIU Chuanling²

1. Huadian Electric Power Research Institute, Hangzhou 310030, China;
2. Shandong Branch of Huadian Electric Power Research Institute, Jinan 250014, China

Received:2017-08-07 Published:2017-10-30 Online:2017-10-30

Abstract

Abstract: There are nine 135MW grade pure condens-ing units and extraction-condensing units with high back pressure heating in the Shandong regional power grid.There are four types of retrofit schemes.In this paper, the characteristics and modification of four kinds of retrofit schemes listed.Through thermal performance test, the eco-nomic indexes after reformed are obtained and analyzed.For the unit reconstructed its LP cylinder current,its modi-fied LP cylinder efficiency is the highest.Because of influ-ence of heat load,circulating water flow and retrofit schemes,four units can not operate without extraction flow during heating period, resulting in lower power capability and higher heat consumption rate.

Key words: 135MW grade, condensing steam tur? bine, circulating water heating, high backpressure retrofit, flow passage reform of LP cylinder

CLC Number:

TM621

LIU Guangyao, WANG Xuedong, SONG Ang, LIU Chuanling. Analysis of Different Reconstruction Technology for Heating Supply with High Back Pressure of 135MW Grade Steam Turbine[J]. Power Generation Technology, 2017, 38(5): 45-50.

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Analysis of Different Reconstruction Technology for Heating Supply with High Back Pressure of 135MW Grade Steam Turbine

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