Performance characteristics of mechanical foam-breakers fitted to a stirred-tank reactor

✍ Scribed by Satoshi Takesono; Masayuki Onodera; Masanori Yoshida; Kazuaki Yamagiwa; Akira Ohkawa

• Publisher: Wiley (John Wiley & Sons)
• Year: 2003
• Tongue: English
• Weight: 170 KB
• Volume: 78
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.741

✦ Synopsis

Abstract

In a stirred‐tank reactor (STR), a comparison of the performance of mechanical foam‐breakers: a six‐blade turbine (F‐B), a six‐blade vaned disk (V‐D), a two‐blade paddle (T‐P), a conical rotor (C‐R), a fluid‐impact dispersion apparatus (FIDA) and a rotating disk mechanical foam‐breaker (MFRD) was carried out using defined foaming media. The foam‐breaking ranges (relative to the gas superficial velocity, U~g~) of the T‐P, C‐R and FIDA were inferior to that of the F‐B, V‐D and MFRD. The power consumption, P~kc~, for foam‐breaking in the MFRD was the lowest among the F‐B, V‐D and MFRD. Operation of the F‐B and V‐D in the STR caused a considerable amount of liquid droplets from the collapsed foam to be entrained with the exhaust air.

© 2002 Society of Chemical Industry