Fluidized bed drying of water soluble polymer
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Kemian tekniikan korkeakoulu |
Master's thesis
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Authors
Date
2019-05-07
Department
Major/Subject
Chemical and Process Engineering
Mcode
CHEM3043
Degree programme
Master's Programme in Chemical, Biochemical and Materials Engineering
Language
en
Pages
97+48
Series
Abstract
The objective of this thesis was to study the effect of various operating parameters on the fluidized bed drying of water-soluble polyacrylamide-gel (PAM-gel). The elucidated information about PAM-gel, synthesis, and drying of PAM and application of dry-polyacrylamide (DPAM) is in the introductory part. Conventional fluid bed dryers (FBDs) and alternative technology in fluidized bed drying are also discussed in the later sections. This study focuses on the effect of varying operating parameters on the fluidized bed drying of PAM-gel. It was necessary to determine the equilibrium moisture content (EMC) for DPAM to examine the effect of operating parameters on the drying process. Moreover, the analysis was based on data obtained from the in-built data logger of lab-scale batch fluidized bed drying equipment. Various operating parameters such as residence time, airflow, feed particle size, bed load, and inlet temperature were studied by analyzing the difference between moisture content and particle size distribution before and after the drying process. The analysis confirmed that neither cutting oil nor particle size had any effect on EMC, as expected. Furthermore, examination of operating parameters displayed some operating parameters exhibit direct and some effect indirectly the drying process of PAM-gel in FBDs.Description
Supervisor
Alopaeus, VilleThesis advisor
Laakkonen, MarkoZhao, Wenli
Keywords
equilibrium moisture content (EMC), fluidized bed dryers (FBDs), polyacrylamide-gel (PAM-gel), dry-polyacrylamide (DPAM)