ANALYSIS OF SAFETY IN OPERATION OF FEED-WATER SYSTEM FOR ULTRA-SUPERCRITICAL 1000 MW UNITS

ZHENG Likun1; XUE Dongfa2; XIE Changjun2 1.Electric Power Science Research Institute under Guangdong Power Grid Corporation

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ANALYSIS OF SAFETY IN OPERATION OF FEED-WATER SYSTEM FOR ULTRA-SUPERCRITICAL 1000 MW UNITS

更新时间：2025-09-28

- ANALYSIS OF SAFETY IN OPERATION OF FEED-WATER SYSTEM FOR ULTRA-SUPERCRITICAL 1000 MW UNITS
- Thermal Power Generation Vol. 40, Issue 5, Pages: 66-68(2011)
- 作者机构：
  
  1. 广东电网公司电力科学研究院
  2. 广州粤能电力科技开发有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2011
- 稿件说明：
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ZHENG Likun1, XUE Dongfa2, XIE Changjun2 1.Electric Power Science Research Institute under Guangdong Power Grid Corporation. ANALYSIS OF SAFETY IN OPERATION OF FEED-WATER SYSTEM FOR ULTRA-SUPERCRITICAL 1000 MW UNITS[J]. Thermal power generation, 2011, 40(5): 66-68.
DOI：

ZHENG Likun1, XUE Dongfa2, XIE Changjun2 1.Electric Power Science Research Institute under Guangdong Power Grid Corporation. ANALYSIS OF SAFETY IN OPERATION OF FEED-WATER SYSTEM FOR ULTRA-SUPERCRITICAL 1000 MW UNITS[J]. Thermal power generation, 2011, 40(5): 66-68. DOI：

摘要

根据某超超临界1 000 MW机组汽动给水泵及其前置泵在正常运行和甩负荷试验时的汽蚀余量

分析了该机组给水系统在不同运行工况下的安全裕度

并提出在恶劣工况下防止前置泵汽蚀的措施

如在设计中提高除氧器布置高度

改善泵结构

降低下降管压损等;在运行中快速投入除氧器的备用加热汽源

减小除氧器压力的下降速度和幅度

减缓前置泵入口压力的下降等。

Abstract

Based on cavitation margin during the time of normal operation and load-rejecting test for the turbine driven feed-water pump and its booster pump of one ultra-supercritical 1 000 MW unit

the safety margin of feed-water system for said unit under different operating conditions has been analysed

and preventive measures for cavitation occurred in the booster pump under adversed operating condition have been put forward as in the following:in design

enhancing the elevation of deaerator

improving the structure of booster pump

and reducing the pressure loss in downcomer tube etc.

as well as in operation

rapidly putting the stand-by heating steam source of the deaerator into service

reducing the decrease speed and magnitude of pressure in the deaerator

and slowing the decrease of inlet pressure for booster pump etc..

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