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3.1

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3.1 Sedimentation 3.1.1 Gravitational sedimentation 1

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3.1.1 Gravitational sedimentation ds

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3.1.1 Gravitational sedimentation2Drag coefficient du0

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3.1.1 Gravitational sedimentation , Re0 >200000Re0 =(3~10)105= 0.1

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3.1.1 Gravitational sedimentation 1< Re0 < 50015.5%

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3.1.1 Gravitational sedimentation3Settling velocity

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3.1.1 Gravitational sedimentation ArAr Re0 Re0u0

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3.1.1 Gravitational sedimentation4

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3.1.2

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3.1.2 t0100%t10m>75m

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3.1.2 4t0StochesVsdmin

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3.1.3

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3.1.4 Settling tank

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3.1.4 Settling tank 10 m10 m

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3.1.5 Centrifugal sedimentation

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3.1.5 Centrifugal sedimentation

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3.1.6 Cyclone separators 1

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3.1.6 Cyclone separators2 dcCritical diameter autui bB c

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3.1.6 Cyclone separators

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3.1.6 Cyclone separators BDdc uidc dcN

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3.1.6 Cyclone separators 0 : pi :

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3.1.6 Cyclone separators d > dcpi =100% d < dcpi 75m >15m 1~10m >3