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由于换热器表面结垢因素的复杂性和不确定性,影响因素的权重很难确定。文中采用灰色关联分析法对冷却水水质、换热器运行工况以及换热表面结构3个方面各因素影响进行评价研究。结果表明:水质的6种参数中碱度对换热表面污垢沉积影响因素的权重最大,其次是钙离子、电导率、氯离子、浊度,影响最小的是溶解氧;运行工况参数中冷却水进口温度对结垢影响比冷却水进口流速明显;而内螺纹管的表面结构中的螺纹数对污垢的形成影响最突出。
Due to the complexity and uncertainty of fouling on the surface of heat exchangers, the weight of influencing factors is difficult to determine. In this paper, the gray relational analysis method is used to evaluate the influence of various factors such as cooling water quality, operating conditions of heat exchanger and heat transfer surface structure. The results showed that the alkalinity of six kinds of water quality parameters had the most important influence factors on the fouling of the heat transfer surface, followed by calcium ion, conductivity, chloride ion and turbidity, and dissolved oxygen was the least affected. The effect of water inlet temperature on fouling is more obvious than that of cooling water inlet, while the number of threads in the surface structure of the internally threaded pipe has the most prominent influence on the fouling.