ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Ungassed power input prediction in stirred tank reactors

Tomáš Kracík and Tomáš Moucha

Chemical Engineering Department, University of Chemistry and Technology, Prague, Prague 6, Czech Republic

E-mail: kracikt@vscht.cz

Received: 28 May 2021  Accepted: 1 September 2021

Abstract:

Stirred tank reactors are one of the crucial equipments in the chemical, biochemical, pharmaceutical, and food industries. The design of mechanically agitated vessels contains two main tasks: to find appropriate geometry of the system (such as vessel shape, impeller types, and others) and to choose suitable driving force that would supply required power input for operational conditions reach. The ungassed power input prediction is necessary for the effective industrial design of the engine. The ungassed power input depends on many variables such as tank geometry, used impeller type, and properties of the batch. This work focuses on the influence of the batch composition, impeller type, and impeller diameter on ungassed power consumption. Experiments were performed in laboratory and pilot plant scale vessels while using various operational conditions (such as impeller type, impeller diameter, batch viscosity, and others). Due to a wide range of operational conditions, the obtained results could be transferable to other systems with similar geometry up to industrial conditions.

Keywords: Mixing; Multi-impeller; Power input; Power number; Prediction

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-01854-x

Chemical Papers 76 (1) 293–300 (2022)