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GB/T 28553-2012: Steam turbines -- Steam purity
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GB/T 28553-2012: Steam turbines -- Steam purity

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ICS27.040 K54 National Standards of People's Republic of China GB/T 28553-2012/IEC /TS61370.2002 Turbine steam purity (IEC /TS61370.2002, IDT) Issued on. 2012-11-01 2012-06-29 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard rule according to GB/T 1.1-2009 given draft. This standard uses the translation method is equivalent to using IEC /TS61370.2002 "turbine steam purity" (in English). Appendix A of this standard is an informative annex. The standard proposed by China Electrical Equipment Industrial Association. This standard by the National Standardization Technical Committee turbine (SAC/TC172) centralized. This standard was drafted. Shanghai Power Equipment Research Institute, Xi'an Thermal Power Research Institute Co., Ltd. The main drafters of this standard. Ye Fen, in the novel, Zhuyou Jun, Yang Ruifu, Liu Chen, Li Xicheng, Zheng Hongliang. GB/T 28553-2012/IEC /TS61370.2002 Turbine steam purity

1 Scope

This standard specifies the chemical properties of steam for a steam turbine in order to prevent corrosion and fouling the steam passage, the risk of corrosion steam turbine, efficiency Rate or reduce output power loss to a minimum. This standard applies to condensing steam or back-pressure power generation steam turbine with a rated power. However, the rated power or steam pressure applied Range by economic factors (such as the relative cost of turbine monitoring apparatus and equipment) limits. This standard is compiled for the new units, but also suitable For existing units. This standard describes the limit values \u200b\u200bfor the protection of the turbine is designed. Users also should be aware of other devices (such as a boiler or steam generation Device) on steam purity. This standard applies to any source of steam turbine driven except for geothermal source. After the initial start, after the steam it may take several months to achieve optimal chemical state some parameters (sodium, cation conductivity) than Other parameters (silica, iron, copper) quickly achieve the best result, normal steam parameters of the target may be difficult to put into operation during the Reached, but with the improvement of the quality of steam and gradually improved. Appendix A lists the recommended guidelines of this standard and the authentication methods of chemical purity steam to steam for to ensure that the turbine Integrity and efficiency of the limit value is not mandatory, as a separate unit on-site guidance on the basis of presentation. Verification. By choosing to close Suitable sampling locations and measurement parameters continuously or intermittently to carry out.

2 Symbols and Abbreviations

The following symbols and abbreviations apply to this document. AVT --- all volatile treatment BWR BWR --- c.con --- cation conductivity CT --- alkali treatment EPT --- equilibrium phosphate treatment FAC --- flow accelerated corrosion IWC --- International Water Conference OT --- oxidation treatment PT --- phosphate treatment PWR PWR ---

3 steam purity control requirements

3.1 corrosion, loss of efficiency or output power loss To ensure that the turbine is running at high efficiency, power output and efficiency, high purity steam. Because impurities can precipitate formed from Which led to loss of efficiency or output power loss, or corrosion. Corrosion can cause rotating parts completely ineffective. Expanding vapor in a low concentration A small amount of a high impurity concentration and moisture coexistence state, which coincides with the moisture of the turbine component surface temperature and pressure, but there are little The difference between the horizontal impurities should be attainable, measurable and consistent with the high efficiency, high output power and high efficiency requirements. GB/T 28553-2012/IEC /TS61370.2002 ...