Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry

ISBN Print: 978-1-56700-034-4

ISBN Online: 978-1-56700-445-8

WATER TREATMENT FOR UTILITY BOILERS - INTERNATIONAL APPROACHES

DOI: 10.1615/ICPWS-1994.940
pages 736-743

要約

For chemists, water treatment usually means removing impurities from water, ie water purification, but for engineers, it often means adding "something" to the water, ie water conditioning. In both cases the aim is the same, namely to reduce corrosion and deposition in the boilers, turbines and associated plant. Water purification is considered briefly; the main emphasis is focused on water conditioning and international approaches. These include the use of all volatile treatment (AVT) with ammonia and hydrazine, the addition of sodium phosphate and sodium hydroxide to drum boilers, and the use of AVT or oxygenated conditioning for once-through boilers. Comparisons are made for sampling positions, parameters monitored, chemical standards.