超临界火电机组的金属腐蚀特点和沉积规律  

Characteristics of Metal Corrosion and Deposit Law for Supercritical Units

作　　者：徐洪[1,2] 

机构地区：[1]江苏省电力试验研究院,南京210036 [2]江苏方天电力技术有限公司,南京211102

出　　处：《动力工程》2009年第3期210-217,共8页Power Engineering

摘　　要：介绍了超临界水的物理化学性质,包括密度、离子积、介电常数、氢键和扩散系数等方面的特性.阐述了超临界火电机组的金属腐蚀特点和沉积规律,并通过实例加以说明.提出了抑制超临界机组金属腐蚀与沉积的措施,即机组投产前对高压给水系统进行充分、有效的化学清洗和机组投产后给水处理尽快转入加氧处理(OT)方式.The physiochemical properties of supercritical water including density, ion product, dielectric constant, hydrogen-bonding as well as diffusion coefficient were introduced. The characteristics of metal corrosion and deposit law for supercritical units were elaborated and illustrated by actual examples. The measures were proposed for supercritical units to inhibit metal corrosion and deposit. Namely the feed water system of the unit should be chemically cleaned sufficiently and effectively before commissioning, and water treatment should shift to oxygenation treatment as soon as possible after commissioning.

关 键 词：超临界机组 金属腐蚀 沉积 全挥发处理 加氧处理 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]