Transcription of CHAPTER 3 CENTRIFUGATION 3.1 INTRODUCTION
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CHAPTER 3 CENTRIFUGATION 3.1 INTRODUCTION
CHAPTER 3 CENTRIFUGATION INTRODUCTION General Background: Centrifugal dewatering is widely used method for separating solid-liquid or liquid-liquid in several industries due to the higher gravitational forces affecting on the particles. In this method, if the applied centrifugal force created by the angular velocity of a rotating basket is larger than capillary force, liquid in the capillary tubes is spontaneously removed from the filter cake [1-10]. For this reason, the centrifugal filters are performed in high speed for the fine particles to obtain lower moisture content product [1,2,9]. When an aqueous suspension of particles is introduced to a centrifuge whose wall is made of a porous medium, the heavier and larger particles settle quickly on the medium while the lighter water (or any liquids) forms a layer over the cake.
suggests that dewatering rate should increase with increasing pressure drop across a filter cake. The extraneous methods of increasing the pressure drop, as shown in the present studies, is particularly useful for increasing the rate of dewatering during the drainage period, which can be critical achieving lower cake moistures [1,12,18].
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