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化工学报  2015 

两种阴离子对析晶污垢沉积的影响

DOI: 10.11949/j.issn.0438-1157.20150043, PP. 2268-2273

Keywords: 污垢热阻,结垢,结晶,阴离子,沉积物

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Abstract:

为研究循环水中离子对析晶污垢沉积特性的影响,实验研究了循环水中不同阴离子对换热管内污垢特性的影响。考察了工质流速、入口温度、工质浓度以及溶液内阴离子浓度对污垢沉积的影响。结果表明含有硝酸根离子循环水的污垢热阻高于氯离子的污垢热阻,并且两种循环水形成污垢热阻的差距随入口温度、管内流速和CaSO4浓度发生变化。伴随阴离子浓度升高,污垢热阻渐近值逐渐变大。硝酸根对热阻提升的影响大于氯离子对热阻的影响。

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