Abstract
AbstractProblems and experience with industrial scale packed columns. Apart from column plates, random and structured packings are being used increasingly as internal components of distillation columns. The advantage of structured packings lies in an enhanced specific separation performance at significantly lower pressure drops than in the case of classical plate columns. In contrast to column plates, there is no defined liquid pathway in random and structured packings; in particular, the dependence upon the initial distribution in columns of large diameter proves to be problematical. Recent theoretical model calculations and laboratory scale studies have shown that the liquid distribution in structured packings is of paramount importance, above all in columns having diameters in excess of 1 m. The present article reports problems and experience gained with industrial scale distillation columns by considering four examples. In addition, the authors also provide an in‐depth account of the factors and problems relating to the assessment of separation performance of industrial columns.
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