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Dynamics of liquid‐solid fluidized bed expansion
Author(s) -
Fan LiangTseng,
Schmitz James A.,
Miller Eugene N.
Publication year - 1963
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690090203
Subject(s) - fluidization , mechanics , fluidized bed , constant (computer programming) , nonlinear system , materials science , process (computing) , time constant , thermodynamics , physics , engineering , computer science , quantum mechanics , electrical engineering , programming language , operating system
The dynamic response of height in liquid‐solid fluidized beds to a change in fluidizing valocity was considered. A linearized model was developed such that the time constant for the system could be estimated with the parameters characterizing the system. Spherical particles, with sizes ranging from 6 to 7 to 70 to 80 mesh and densities ranging from 1.08 g./cc. to 2.5 g./cc., were fluidized by water in a 2‐in. diameter glass column. The experimental response to step and rectangular pulse inputs in fluidizing velocity were measured and frequency response data were also obtained. Agreement between the experimental data and the model was quite reasonable in view of the known nonlinearity of fluidization systems. These results show that for control purposes the system behaves as a first order time constant process.