BREAKDOWN ACCIDENTS OF VALVE DISC FROM REHEATED STEAM VALVE OF ONE 600 MW STEAM TURBINE UNIT

LIU Derong1; JIANG Zhiqiang2; LIU Yuanlin31.North China Electric Power Science Research Institute(Xi'an) Co Ltd

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BREAKDOWN ACCIDENTS OF VALVE DISC FROM REHEATED STEAM VALVE OF ONE 600 MW STEAM TURBINE UNIT

更新时间：2025-09-28

- BREAKDOWN ACCIDENTS OF VALVE DISC FROM REHEATED STEAM VALVE OF ONE 600 MW STEAM TURBINE UNIT
- Thermal Power Generation Vol. 39, Issue 6, Pages: 38-40(2010)
- 作者机构：
  
  1. 华北电力科学研究院(西安)有限责任公司
  2. 华北电力科学研究院有限责任公司
  3. 西北电力设计院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK268
- Published：2010
- 稿件说明：
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LIU Derong1, JIANG Zhiqiang2, LIU Yuanlin31.North China Electric Power Science Research Institute(Xi'an) Co Ltd. BREAKDOWN ACCIDENTS OF VALVE DISC FROM REHEATED STEAM VALVE OF ONE 600 MW STEAM TURBINE UNIT[J]. Thermal power generation, 2010, 39(6): 38-40.
DOI：

LIU Derong1, JIANG Zhiqiang2, LIU Yuanlin31.North China Electric Power Science Research Institute(Xi'an) Co Ltd. BREAKDOWN ACCIDENTS OF VALVE DISC FROM REHEATED STEAM VALVE OF ONE 600 MW STEAM TURBINE UNIT[J]. Thermal power generation, 2010, 39(6): 38-40. DOI：

摘要

介绍了某亚临界600 MW机组再热阀的工作原理

并结合实例对该机组再热阀阀碟断裂事故过程及原因做了分析

提出了该型机组安全运行中的注意事项

如再热阀开启前应注意暖阀

开启时将再热蒸汽压力调节至0.3 MPa以下

以及改进再热阀前后旁通管节流孔尺寸等。

Abstract

The working principle of reheated steam valve(RSV) used for one subcritical 600 MW unit has been presented

the process and causes of breakdown accidant of valve disc from RSV of said unit being analysed by combining with practical examples

and the matters needing to pay attention in safe operation of said unit

such as paying attention to warm-up the valve before opening RSV

adjusting the reheated steam pressure to lower than 0.3 MPa during the time of opening RSV

as well as improving the orifice size on by-pass pipe before and after the RSV etc.

being put forward.

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