Process Equipment and Plant Design Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from 1.5-2.5 3.5-5.5 44119 7.5-10.0 1.5-2.5 3.5-5.5 44119 7.5-10.0 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Ratio of tube length to shell diameter for a shell and tube heat exchanger is Both B & C 8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers < 4 : 1 for gas-gas exchangers 4 : 1 to 8 : 1 for liquid-liquid exchanger Both B & C 8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers < 4 : 1 for gas-gas exchangers 4 : 1 to 8 : 1 for liquid-liquid exchanger ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design For high pressure process equipments/vessels, the connected nozzle should be Brazed Flanged Screwed Welded Brazed Flanged Screwed Welded ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Le/D for a Tee (used as elbow, entering branch) would be Both B and C Less than that for Tee (used as elbow, entering run) Around 90 More than that for Tee (used as elbow, entering run) Both B and C Less than that for Tee (used as elbow, entering run) Around 90 More than that for Tee (used as elbow, entering run) ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger Facilitates comparatively easier external cleaning because of large clearance Both B and C Permits the use of less tubes in a given shell diameter Permits the use of more tubes in a given shell diameter Facilitates comparatively easier external cleaning because of large clearance Both B and C Permits the use of less tubes in a given shell diameter Permits the use of more tubes in a given shell diameter ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ρ = apparent solid density, kg/m³ L = flow rate of dry solids, kg/see. m² drier cross-section H = hold up of solid.) Z.H/L.ρ L/Z.H.ρ Z.H.ρ/L H.ρ/L Z.H/L.ρ L/Z.H.ρ Z.H.ρ/L H.ρ/L ANSWER DOWNLOAD EXAMIANS APP
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