Packed Hydraulic (ENGINEERING DESIGN GUIDELINE) - KLM ...

KLM TechnologyGroupPractical EngineeringGuidelines for Processing PlantSolutionsPacked Hydraulic(ENGINEERING DESIGN GUIDELINES)Page 12 of 57Rev: 01March 20114. Design packed size recommended as followsTable 1: Packed size in different column diameter< 0.3 (1)Column Diameterm (ft)0.3 to 0.9 (1 to 3)> 0.9 (3)< 25 (1)Packed sizemm (in)25 to 38 (1 to 1.5)50 to 75 (2 to 3)5. The thickness of random packed is recommended 0.012 to 0.028 in (0.3 to 0.7mm) and for structured packed is 0.006 to 0.008 in (0.15 to 0.20 mm) to reducecosts.6. The ratio of design vapor load to the ultimate capacity vapor load must be keptbelow 85%.7. For gas flow rates of 500 ft 3 /min (14.2 m 3 /min), use 1 in (2.5 cm) packing, for gasflows of 2000 ft 3 /min (56.6 m 3 /min) or more, use 2 in (5 cm) packing.8. A wide trough distributor or an orifice pan may required If liquid rate is above 30gpm/ft 2 (20 dm 3 /s/m 2 ) but it is not recommended if liquid rate is less than 10gpm/ft 2 (6.7 dm 3 /s/m 2 ).9. Ratio of tower diameter to packing diameter should usually be at least 1510. Due to the possibility of deformation, plastic packing should be limited to anunsupported depth of 10-15 ft (3-4 m) while metal packing can withstand 20-25 ft(6-7.6 m).11.Liquid distributor should be placed every 5-10 tower diameters (along the length)for pall rings and every 20 ft (6.5 m) for other types of random packing.12. For redistribution, there should be 8-12 streams per sq. foot of tower area fortowers larger than three feet in diameter. They should be even more numerous insmaller towers.These design guideline are believed to be as accurate as possible, but are very general and not for specific designcases. They were designed for engineers to do preliminary designs and process specification sheets. The finaldesign must always be guaranteed for the service selected by the manufacturing vendor, but these guidelines willgreatly reduce the amount of up front engineering hours that are required to develop the final design. The guidelinesare a training tool for young engineers or a resource for engineers with experience.This document is entrusted to the recipient personally, but the copyright remains with us. It must not be copied,reproduced or in any way communicated or made accessible to third parties without our written consent.