Abstract The presence of fouling in evaporators can increase energy consumption as well as capital and labor costs. During corn ethanol production, fouling occurs when thin stillage is concentrated in multiple effect evaporators to form condensed distillers solubles. Limited studies have been conducted on fouling of corn ethanol processing. Process streams are biological in origin and have variable compositions. The objective of this study was to develop an improved understanding of components that accelerate fouling of thin stillage evaporators. An annular fouling probe was used to evaluate compositional variables on fouling behavior of dry grind corn thin stillage. Three experiments were performed with commercial processing streams. In the first experiment, the effects of carbohydrate materials in thin stillage on evaporator fouling were investigated by adding starch and sucrose. In the second experiment, commercial thin stillage samples were treated by adding wet cake. The third experiment was designed to observe if the age of thin stillage sample would affect fouling. The results indicate that fouling resistances increased with starch addition, as well as with wet cake addition, at equal total solids contents. Insoluble starch addition had larger effects than soluble sucrose addition. Sucrose alone did not cause increased rapid fouling.

中文翻译：

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成分变量对稀釜馏物结垢行为的影响

摘要 蒸发器中结垢的存在会增加能源消耗以及资本和劳动力成本。在玉米乙醇生产过程中，当稀酒糟在多效蒸发器中浓缩以形成冷凝的酒糟可溶物时会发生结垢。对玉米乙醇加工的污染进行了有限的研究。工艺流是生物来源的并且具有可变的成分。本研究的目的是加深对加速稀釜馏物蒸发器结垢的组件的理解。环形污染探针用于评估干磨玉米稀酒糟污染行为的成分变量。用商业加工流进行了三个实验。在第一个实验中，通过添加淀粉和蔗糖，研究了酒糟中碳水化合物材料对蒸发器结垢的影响。在第二个实验中，通过添加湿饼来处理商业稀酒糟样品。第三个实验旨在观察稀酒糟样品的年龄是否会影响结垢。结果表明，在相同的总固体含量下，抗污性随着淀粉的添加以及湿饼的添加而增加。添加不溶性淀粉比添加可溶性蔗糖具有更大的影响。单独的蔗糖不会导致快速结垢增加。结果表明，在相同的总固体含量下，抗污性随着淀粉的添加以及湿饼的添加而增加。添加不溶性淀粉比添加可溶性蔗糖具有更大的影响。单独的蔗糖不会导致快速结垢增加。结果表明，在相同的总固体含量下，抗污性随着淀粉的添加以及湿饼的添加而增加。添加不溶性淀粉比添加可溶性蔗糖具有更大的影响。单独的蔗糖不会导致快速结垢增加。