Improvement of chemical monitoring of water-chemistry conditions at thermal power stations based on electric conductivity and pH measurements

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• 作者：A. B. Larin ; B. M. Larin
• 刊名：Thermal Engineering
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：63
• 期：5
• 页码：374-378
• 全文大小：323 KB
• 刊物类别：Engineering
• 刊物主题：Engineering Thermodynamics and Transport Phenomena
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1555-6301
• 卷排序：63

文摘

The increased requirements to the quality of the water heat conductor for working superhigh (SHP) and supercritical (SCP) pressure power plants and promising units, including combined-cycle gas turbine (CCGT) units and power plants with ultrasupercritical parameters (USCPs), can largely be satisfied through specific electric conductivity and pH measurements for cooled heat conductor samples combined with calculations of ionic equilibria and indirect measurements of several specified and diagnostic parameters. The possibility of calculating the ammonia and chloride concentrations and the total concentration of hardness and sodium cations in the feed water of drum-type boilers and the phosphate and salt contents in boiler water was demonstrated. An equation for evaluating the content of potentially acid substances in the feed water of monotube boilers was suggested. The potential of the developed procedure for evaluating the state of waterchemistry conditions (WCCs) in power plants with CCGT units was shown.KeywordsTPS power plantswater-chemistry conditionsautomatic chemical controlspecific electric conductivity and pH measurements of cooled samplesphosphate dosing control and management