Get fluidization solids handling and processing PDF

By Wen-Ching Yang

ISBN-10: 0815514271

ISBN-13: 9780815514275

This quantity, Fluidization, Solids dealing with, and Processing, is the 1st of a chain of volumes on "Particle Technology". debris are vital items of chemical method industries spanning the elemental and area of expertise chemical substances, agricultural items, prescription drugs, paints, dyestuffs and pigments, cement, ceramics, and digital fabrics. Solids dealing with and processing applied sciences are hence necessary to the operation and competitiveness of those industries. Fluidization know-how is hired not just in chemical creation, it is also utilized in coal gasification and combustion for strength iteration, mineral processing, meals processing, soil washing and different similar waste remedy, environmental remediation, and source restoration methods. The FCC (Fluid Catalytic Cracking) know-how in general hired within the sleek petroleum refineries is usually according to fluidization ideas.

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8, the influence of the wall was absent when the bubble diameter was roughly 1/5 the bed width or less. For deeper beds or higher gas velocity, the ratio of bubble diameter to bed width is expected to be the best criterion for determining when wall effects will be negligible. 22 m square bed. The tube bed results are shown in Figs. 13–15 with a T symbol. The behavior of bubbles in the bed with the tube bank resembled that of an open bed with smaller width. 2 0. 0 WALL SPACING Dr CH. Figure 13. standard deviation~Tdenoteswith ~bes.

8, the influence of the wall was absent when the bubble diameter was roughly 1/5 the bed width or less. For deeper beds or higher gas velocity, the ratio of bubble diameter to bed width is expected to be the best criterion for determining when wall effects will be negligible. 22 m square bed. The tube bed results are shown in Figs. 13–15 with a T symbol. The behavior of bubbles in the bed with the tube bank resembled that of an open bed with smaller width. 2 0. 0 WALL SPACING Dr CH. Figure 13. standard deviation~Tdenoteswith ~bes.

45). 3 Low Slip Velocity Finally, consider the case when the magnitude of the slip velocity between the particles and the gas is close to umf /ε everywhere in the fluidized bed. With the vertical pressure drop equal to the particle weight, the following holds for any value of the particle Reynolds number, Eq. (50) ∆p u mf = β | u - v |≈ β = ρs g (1 - ε ) L ε Eq. (51) β = ρs g (1 - ε ) ε u mf and Eq. (52) 1 u mf βL Fr = u o / u mf (1 - ε )ε for u′ - v′ → ρs uo ε uo Again, when uo /umf and Fr are identical for two beds and the slip velocity is close to umf /ε, the dimensionless drag coefficient is also identical for two beds.

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fluidization solids handling and processing by Wen-Ching Yang


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