A rate-based model of an absorption column was developed and used to analyze several intercooling strategies utilizing “heat exchange packings.” These packings are capable of removing heat from the column and transferring it to a cooling fluid within the packing. For absorption of CO₂ into aqueous monoethanolamine under industrial conditions, intercooling via heat exchange packings placed along 10–20% of the column could reduce the column height by ∼15%. The height of these columns was close to the minimum theoretical value, calculated by numerically optimizing the temperature profile. Effective intercooling could also be achieved by using the cool, rich solvent as the cooling fluid. This reduces the cooling load and facilitates recovery of waste heat. Heat exchange packings could also be used to redistribute heat within the column, reducing the column height with no net cooling load. However, this approach requires larger heat transfer coefficients than have been experimentally observed.

中文翻译：

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通过热交换填料实现先进的吸收器热集成

开发了一个基于速​​率的吸收塔模型，并用于分析利用“热交换填料”的几种中间冷却策略。这些填料能够从塔中带走热量并将其传递给填料内的冷却流体。用于吸收 CO ₂在工业条件下转化为含水单乙醇胺，通过沿柱 10-20% 放置的热交换填料进行中间冷却可以将柱高降低约 15%。这些柱子的高度接近最小理论值，这是通过对温度曲线进行数值优化计算得出的。使用冷的富溶剂作为冷却液也可以实现有效的中间冷却。这减少了冷却负荷并促进了废热的回收。热交换填料也可用于在塔内重新分配热量，在没有净冷负荷的情况下降低塔高。然而，这种方法需要比实验观察到的更大的传热系数。