Abstract
INVESTIGATION OF THE HYDRODYNAMIC FACTORS EFFECTS AND QUANTIFICATION OF FINES FLOCCULATION USING COFACTOR-POLYETHYLENE OXIDE: A METHODOLOGY TO PRODUCE THE REQUIRED FLOC SIZE AND ESTIMATE THE COST
Dr. Mohammad Raji Abdallah Qasaimeh*
ABSTRACT
The small particles in most industrial applications are flocculated to therequired size. The fines flocculation using the cofactor (CF)-polyethyleneoxide (PEO) is conventionally used in papermaking. In this work, wehave investigated the effects of the hydrodynamic process factors: thestirring rate, the shear rate, Reynolds number and the effective shear rateon fines flocculation. Floc size and flocculation rate constant were themain important parameters have been investigated to get the required sizeand the flocculation speed that economize and reduce the operation cost.For more, we used the methodology proposed in previous work thatcharacterized flocculation process and found the required floc size and flocculation speed fromthe hydrodynamic process factors. For more, we investigated the stirring intensity ( ) p G alongwith the floc size (A) , where ( ) p G is the process shear rate and ( ) is the characteristic time offlocculation. The dimensionless p G value quantifies the micro characteristics and theinteractions among the fines with time. At low values of p G , results show high values of p Gand longer characteristic time that indicate high operation cost. At high values of p G , resultsshow a decrease in p G value, which oscillates in between 720 and 543 and indicates a decreasein the operation cost.
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