Departamento de Tecnologías del Medio Ambiente, Centro Andaluz de Ciencia y Tecnología Marina (CACYTMAR), Universidad de Cádiz, Cádiz, Spain.
Biofouling. 2010 Nov;26(8):923-30. doi: 10.1080/08927014.2010.531464.
In an industrial seawater cooling system, the effects of three different antifouling treatments, viz. sodium hypochlorite (NaClO), aliphatic amines (Mexel®432) and UV radiation, on the characteristics of the fouling formed were evaluated. For this study a portable pilot plant, as a side-stream monitoring system and seawater cooling system, was employed. The pilot plant simulated a power plant steam condenser, having four titanium tubes under different treatment patterns, where fouling progression could be monitored. The nature of the fouling obtained was chiefly inorganic, showing a clear dependence on the antifouling treatment employed. After 72 days the tubes under treatment showed a reduction in the heat transfer resistance (R) of around 70% for NaClO, 48% for aliphatic amines and 55% for UV, with respect to the untreated tube. The use of a logistic model was very useful for predicting the fouling progression and the maximum asymptotic value of the increment in the heat transfer resistance (ΔR(max)). The apparent thermal conductivity (λ) of the fouling layer showed a direct relationship with the percentage of organic matter in the collected fouling. The characteristics and mode of action of the different treatments used led to fouling with diverse physicochemical properties.
在工业海水冷却系统中，评估了三种不同的防污处理方法（次氯酸钠（NaClO）、脂肪胺（Mexel®432）和紫外线辐射）对形成的污垢特性的影响。为此研究，使用了一个便携式中试工厂，作为侧流监测系统和海水冷却系统。该中试工厂模拟了一个发电厂的蒸汽冷凝器，有四根钛管处于不同的处理模式下，可以监测污垢的进展情况。获得的污垢主要是无机的，明显取决于所使用的防污处理方法。72 天后，经过处理的管子的传热阻力（R）相对于未处理的管子降低了约 70%，次氯酸钠处理降低了 48%，脂肪胺处理降低了 55%，紫外线处理降低了 55%。使用逻辑模型非常有助于预测污垢的进展和传热阻力增加的最大渐近值（ΔR(max)）。污垢层的表观导热系数（λ）与收集到的污垢中有机物的百分比呈直接关系。不同处理方法的特性和作用方式导致了具有不同物理化学性质的污垢。
