Drying of polymer powder in fluidized bed: Modeling of multizone dryer | Zendy

Н. М. Островский | Zendy

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Drying of polymer powder in fluidized bed: Modeling of multizone dryer

Author(s) -

Н. М. Островский

Publication year - 2014

Publication title -

hemijska industrija

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.147

H-Index - 19

eISSN - 2217-7426

pISSN - 0367-598X

DOI - 10.2298/hemind131016007o

Subject(s) - fluidized bed , materials science , polymer , polypropylene , diffusion , chemical engineering , porosity , economies of agglomeration , heptane , composite material , chromatography , chemistry , thermodynamics , organic chemistry , physics , engineering

The process of drying of porous polymer powder (polypropylene) intended to remove the solvent (heptane) is analyzed. The dryer consists of two stages (apparatus) with multizone fluidized bed. The mathematical model of the process in multizone fluidized bed is proposed. The rate-limiting step, depending on diameter of polymer particles, is determined. It was found that in relatively large particles (>200 μm) the rate of drying is limited by intraparticle diffusion. A way to decrease the energy consumption in drying has been also discussed and verified in experiments

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