Abstract
One of the methods for the improvement of reliability and efficiency of the equipment at heat power plants is the decrease in the rate of corrosion of structural materials and sedimentation in water/steam circuit. These processes can be reduced to minimum by using the water with low impurity content and coolant treatment. For many years, water and steam quality standards were developed in various countries (United States, Germany, Japan, etc.) for specific types of equipment. The International Association for the Properties of Water and Steam (IAPWS), which brings together specialists from 21 countries, developed the water and steam quality standards for various types of power equipment based on theoretical studies and long-term operating experience of power equipment. Recently, various water-chemistry conditions are applied on heatpower equipment including conventional boilers and HRSGs with combined cycle power plants (Combined Cycle Power Plants (CCPP)). In paper, the maintenance conditions of water chemistry with ammonia or volatile amine dosing are described: reducing AVT(R), oxidizing AVT(O), and oxygen OT. Each of them is provided by the water and steam quality standards and recommendations are given on their maintenance under various operation conditions. It is noted that the quality control of heat carrier must be carried out with a particular care on the HPPs with combined cycle gas turbine units, where frequent starts and halts are performed.
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References
IAPWS, Technical guidance document: Volatile treatments for the steam-water circuits of fossil and combined cycle/HRSG power plants, 2015. http://www.iapws.org.
IAPWS, Technical guidance document: Corrosion product sampling and analysis for fossil and combined cycle plants, 2014. http://www.iapws.org.
IAPWS, Technical guidance document: Procedures for the measurement of carryover of boiler water into steam, 2008. http://www.iapws.org.
Rules of Technical Operation of Power Stations and Grids of the Russian Federation (Gosenergonadzor, Moscow, 2003) [in Russian].
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Original Russian Text © T.I. Petrova, K.A. Orlov, R.B. Dooley, 2016, published in Teploenergetika.
This paper opens the cycle of publications on the water and steam quality standardization for energy boilers and energy blocks of TPPs. Prior quality standards on rules for technical maintenance of heat carrier are out of date and do not reflect the state of water-chemistry regimes of CCGT energy blocks and the regimes with amine dosing that have become widespread. Here, the state of standardization of water-chemistry regime of energy boilers of West-European and American HPPs is given according to the materials accepted by the International Association on Properties of Water and Steam. The authors of the paper represent the Russian division of IAPWS together with the leaders of the International Association (Editor Notes).
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Petrova, T.I., Orlov, K.A. & Dooley, R.B. International water and steam quality standards on thermal power plants at all-volatile treatment. Therm. Eng. 63, 896–902 (2016). https://doi.org/10.1134/S0040601516100086
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DOI: https://doi.org/10.1134/S0040601516100086