Dr. Manfred Weber, Dr. Andreas G. Thomé, Dr. Mark Hapke, Dr. Aike Meier zu Greffen
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引用次数: 0
Abstract
Jet mixing or gravity-driven mixing by rising gas bubbles can be applied for homogenization of liquids in tanks (→ concentration or temperature) or for shortstopping of reactions (injecting an inhibitor or a cooling/diluting liquid). Whereas the mixing efficiency of gas bubbles in large bubble column reactors at superficial gas velocities above 2 cm s−1 is well-known, less information is available for significantly lower gas flow rates below 1 mm s−1 (→ bubble plumes). This can be applied to enhance heat transfer for cooling down a stagnant liquid in a reactor after a shutdown. These mixing processes are reviewed and demonstrated by large-scale field tests. The application of the axial dispersion model to evaluate mixing times is discussed.
喷射混合或由上升的气泡驱动的重力混合可以应用于罐内液体的均质化（→浓度或温度）或反应的短暂停止（注入抑制剂或冷却/稀释液体）。虽然在表面气速大于2 cm s - 1时，大型气泡塔反应器中气泡的混合效率是众所周知的，但对于低于1 mm s - 1的明显较低的气体流速（→气泡羽流），可获得的信息较少。这可以应用于增强传热，以便在反应堆关闭后冷却停滞的液体。这些混合过程进行了审查，并证明了大规模的现场试验。讨论了轴向分散模型在评价混合次数中的应用。
期刊介绍：
Die Chemie Ingenieur Technik ist die wohl angesehenste deutschsprachige Zeitschrift für Verfahrensingenieure, technische Chemiker, Apparatebauer und Biotechnologen. Als Fachorgan von DECHEMA, GDCh und VDI-GVC gilt sie als das unverzichtbare Forum für den Erfahrungsaustausch zwischen Forschern und Anwendern aus Industrie, Forschung und Entwicklung. Wissenschaftlicher Fortschritt und Praxisnähe: Eine Kombination, die es nur in der CIT gibt!
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