摘要
Abstract
The traditional oxygenated treatment of feedwater jeopardizes operation safety of units due to falling-off of oxide skin of superheater. However, low oxygenated treatment of feedwater can not drastically e-liminate flow accelerated corrosion of feedwater and steam-liquid phase transition zone. After oxygenated treat-ment in steam-liquid phase transition zone of high-pressure heater of ultra-supercritical units, accurate, fixed-point and quantitative oxygenated treatment is achieved and flow accelerated corrosion of phase transition zone for high-pressure heater is successfully eliminated; in the meantime, the risk of oxide skin falling-off of superheater is prevented and the security and economical efficiency of the units are improved. After oxygenat-ed treatment of steam-liquid phase transition zone, conversion speed of the dense Fe2O3 oxide film is fast, Fe concentration of high-pressure heater drainage decreases by 85%and Fe concentration is less than 1μg/L.关键词
超超临界机组/高压加热器/汽液相变区/氧化处理/腐蚀Key words
ultra-supercritical units/high-pressure heater/steam-liquid phase transition zone/oxygenated treatment/corrosion分类
信息技术与安全科学
