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SR13 Mecānica dos Fluidos |
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Title:
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EFFECT OF SEDIMENTATION ON MODELING COMPRESSIBLE CAKE FORMATION IN GAS FILTERS
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Summary :
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ABSTRACT
GAS FLOW THROUGH THE CAKE FORMED OVER THE SURFACE OF A GAS FILTER CREATES AN AERODYNAMIC DRAG THAT INCREASES MECHANICAL COMPRESSION ON THE LAYERS CLOSER TO THE SURFACE, REDUCING THEIR THICKNESS AND PERMEABILITY. THIS INDUCES AN INCREASE OF THE PRESSURE DROP THROUGH THE FILTER-CAKE SYSTEM COMPARED TO THE INCOMPRESSIBLE CAKE CASE. PART OF THE PARTICLES FROM THE INCOMING GAS STREAM SETTLES DOWN IN THE FILTRATION VESSEL AND DO NOT PARTICIPATE ON CAKE FORMATION. A MODEL WAS DEVELOPED, TAKING INTO ACCOUNT CAKE COMPRESSIBILITY, TO CHECK THE EFFECT OF THE SETTLING PROCESS. DARCY S LAW WAS USED TO CALCULATE THE PRESSURE DROP THROUGH EACH LAYER OF FILTER CAKE. THREE CONSTANT VELOCITY LABORATORY FILTRATION EXPERIMENTS UNDER HIGH TEMPERATURE COAL GASIFICATION CONDITIONS WERE USED TO DETERMINE THE EMPIRICAL PARAMETERS REQUIRED, AS WELL AS TO VALIDATE THE MODEL. IT WAS OBSERVED THAT THE PRECISION OF THE MODEL IN PREDICTING THE FILTER CLEANING INTERVALS DEPENDS ON THE KNOWLEDGE OF THE SETTLING PROCESS.
KEYWORDS: GAS FILTRATION, CAKE COMPRESSIBILITY,CLEANING INTERVAL.
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Author :
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Goldstein Jr, Leonardo 0
Neiva, Antonio Carlos de Barros
Romeo, Luis Miguel 0
Romeo, Luis Miguel
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Paper View :
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