Transcript Lecture 6
Solids Conveying Equipment • • • • • • • Apron Auger Belt Bucket elevator Continuous flow Pneumatic Vibratory Ulrich, 2004 1 Solids Conveying Equipment • • • • • • • Apron Auger Belt Bucket elevator Continuous flow Pneumatic Vibratory Ulrich, 2004 2 Ulrich, 2004 3 Heuristics 17 Oct 12 4 Solids Conveying Equipment • • • • • • • Apron Auger Belt Bucket elevator Continuous flow Pneumatic Vibratory Ulrich, 2004 5 Pneumatic Conveying Significant pressure drop is required to accelerate the solids Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 6 Pneumatic Conveying Solids are suspended if the gas velocity is above the minimum. Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 7 Pneumatic Conveying Data for various solids. Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 8 Pneumatic Conveying Solid particle velocities, us, are related to terminal velocity, uo, and the gas velocity, uG. [all in m/s] uG u s uo 0.468 7.25 uo s Px u s2 2805 Pair F uo Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 9 Comminution (size reduction) Equipment • • • • Compression Impaction Attrition (rubbing) Cutting 10 Ulrich, 2004 11 Towler & Sinnott, 2008 12 Table 4.5a Criteria and data for rapid design of crushing and grinding equip. Ulrich, 2004 13 Table 4.5a Criteria and data for rapid design of crushing and grinding equip. Ulrich, 2004 14 Comminution (size reduction) Equipment Jaw Crusher Gyratory Crusher 15 Comminution (size reduction) Equipment Disk / Attrition Mill Roll Crusher 16 Comminution (size reduction) Equipment Rod Mill 17 Comminution (size reduction) Equipment Ball Mill 18 Comminution (size reduction) Equipment Jet Mill 19 Comminution (size reduction) Equipment Rotary Cutter 20 Table 4.5b Typical materials processed in different types of crushing and grinding equip. Ulrich, 2004 21 Towler & Sinnott, 2008 22 Wikipedia 23 Towler & Sinnott, 2008 24 Agitators and Mixing Equipment • • • • • Suspend solids Disperse gases and liquids Emulsify one liquid in another Promote heat transfer Blending two or more materials together 25 Table 4.16 Criteria and Data for the Preliminary Design of Agitators and Mixers Ulrich, 2004 26 Table 4.16 Criteria and Data for the Preliminary Design of Agitators and Mixers Ulrich, 2004 27 Ulrich, 2004 28 Agitators and Mixing Equipment Fluid mixing Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 29 Agitators and Mixing Equipment Fluid mixing: Baffles Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 30 Agitators and Mixing Equipment Fluid mixing: off-center Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 31 Agitators and Mixing Equipment Common Impellers Coulson and Richardson’s Chemical Engineering Volume 1, 6th ed. 32 Heuristics Questions? 33