Performance Characteristics of a Stirred-Tank Reactor with a Mechanical Foam-Breaker Utilizing Shear Force

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Masayuki Onodera¹  Satoshi Takesono¹  Akira Ohkawa²  Kazuaki Yamagiwa²  Masanori Yoshida² 

[1] Department of Applied Chemistry and Biotechnology, Niigata Institute of Technology;Department of Chemistry and Chemical Engineering, Niigata University

关键词: Stirred-Tank Reactor;    Foam-Breaker;    Shear Force;    Foam-Breaking Power;    Oxygen Transfer Performance;   

DOI  :  10.1252/jcej.37.1488

来源: Maruzen Company Ltd

【 摘 要 】

References(24)Cited-By(2)A new mechanical foam-breaker was developed. It uses the shear force between a fixed orifice plate and a rotating disk (MFUS). Foam-breaking performance of the MFUS fitted to a stirred-tank reactor (STR) was evaluated from changes in foam density and shearing power. The maximum value of the ratio of foam density (after foam breaking) to liquid density was 0.90. Change in foam densities before and after foam breaking in the MFUS was considerably larger than that in existing mechanical foam-breakers with rotating parts at the same level of power for foam breaking. The volumetric liquid-phase oxygen transfer coefficient was measured in the bubble-dispersing and foam-ascending sections of the STR with the MFUS. Comparison of the volumetric liquid-phase oxygen transfer coefficient between the STR with the MFUS and the STR or the foam column in terms of the specific power input demonstrated higher oxygen transfer performance and saving power requirements for the STR with the MFUS.

【 授权许可】

Unknown