ANALYSIS OF AND TEST STUDY ON SALT DEPOSITION IN STEAM TURBINE OF SUBCRITICAL 600 MW UNITS

WANG Yinggao; LI Yongli; XING Chengxia; JIN Xuliang; ZHOU Zilong North China Electric Power Science Research Institute Co Ltd

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ANALYSIS OF AND TEST STUDY ON SALT DEPOSITION IN STEAM TURBINE OF SUBCRITICAL 600 MW UNITS

Thermal Power Generation Vol. 40, Issue 11, Pages: 46-51(2011)

更新时间：2025-09-28

- ANALYSIS OF AND TEST STUDY ON SALT DEPOSITION IN STEAM TURBINE OF SUBCRITICAL 600 MW UNITS
- 作者机构：
  
  华北电力科学研究院有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.8
- Published：2011
- 稿件说明：
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WANG Yinggao, LI Yongli, XING Chengxia, et al. ANALYSIS OF AND TEST STUDY ON SALT DEPOSITION IN STEAM TURBINE OF SUBCRITICAL 600 MW UNITS[J]. Thermal Power Generation, 2011, 40(11): 46-51.
DOI：

WANG Yinggao, LI Yongli, XING Chengxia, et al. ANALYSIS OF AND TEST STUDY ON SALT DEPOSITION IN STEAM TURBINE OF SUBCRITICAL 600 MW UNITS[J]. Thermal Power Generation, 2011, 40(11): 46-51. DOI：

摘要

在对亚临界600MW汽轮机积盐原因进行定性分析的基础上

通过对3台同型号机组进行锅炉热化学试验研究

对影响机组蒸汽品质的诸多因素进行了定量考查。结果表明

为提高亚临界600MW机组汽包炉蒸汽品质

采用平衡磷酸盐处理(EPT)工况炉水最优监控指标为:ρ(PO43-)0.4mg/L

DD10μS/cm

pH值9.30～9.50;蒸汽(以钠计)携带系数应0.1%

机组负荷变动速率应≤9.0MW/min

汽包压力应18.5MPa。针对以上要求

提出了预防高参数机组汽轮机积盐的相关措施。

Abstract

Based on qualitative analysis carried on subcritical 600 MW units for finding out the causes of salt deposition in steam turbines

through thermo-chemical test study on boilers of three units of the same type

many affecting factors for steam quality of units have been quantitatively investigated.Results show that the optimal monitoring indices of boiler water under operating condition of equilibrium phosphate treatment(EPT) should be as follows ρ(PO3-4)0.4 mg/L

DD10 μS/cm

pH value=9.30~9.5;the entrainment coefficient of steam0.1%

the change rate of unit load≤9.0 MW/min

the pressure in drum of boiler18.5 MPa

so as to enhance the steam quality of subcritical 600 MW drum boiler.Directing against the above-mentioned requirements

preventive measures for salt deposition in steam turbines of high parameter units have been put forward.

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