Prepared by:Prepared by: Mohammed S. Al-ZamilMohammed S. Al-Zamil

Prepared For:Prepared For:Dr.M.Al-AhmadDr.M.Al-Ahmad

High lights • Introduction

• Objective

• Flooding point

• Loading point

• Experimental step

• Result from lab

• Discussion & conclusion

Introduction• Packed column it is very important process in chemical

engineering.

• Packed bed is a hollow tube, pipe, or other vessel that is filled with a packing material.

• there are tow types of packing: 1) Random packing 2) structured packing

• Random packing has a many types like ( raschig rings, metal ball rings…etc).

objective of this experimental

• In this experiment interested in pressure drop and loading & flooding through the packing column.

• Finding pressure drop through paced column as a function in air flow with a different water flows .

Flooding point• Amount of liquid flood in the top of the column, with

increasing pressure drop due to the accumulation of liquid in side packed column.

• There is an upper limit to the air flow rate velocity and above this velocity the tower cannot operate.

Loading point• Amount of liquid accumulate in side the

packed column ,that generate pressure drop.

Packed bed column

Experimental steps• passing the maximum air flow until all evidence of

moisture in the packing has disappeared.• run on the pump of air .• pressure differential cross the column was readied At

( 0 ) flow rate of air.

• flow rate of air was started @ (20 L/min) , and then pressure drop cross the column was readied. Then we repeat this step until (160 L/min) air flow. And we take the result @ dry & wet column.

• Then we change the water flow rate respectively (1.5 , 2, 2.5 , 3 )L/min.

Result from lab

0

10

20

30

40

50

60

0 20 40 60 80 100 120 140 160 180

PR

ES

SU

R D

RO

P (

cm w

ater

)

AIR FLOW RATE ( L / MIN )

PACKED BED PRESSUR DROP

WF= 1.5 L/MINWF= 2 L/MN

WF= 2.5 L/MIN

FOOLING

LOADING

Discussions

• From the graphs we see the loading point is appearing at 2 , 2.5 and 3 L/min of flow rate of water ,at 160 , 140 L / min of air flow rate respectively.

• Also the flooding appears after the loading directly at 2.5 and 3 L / min of flow rate of water ,at 160 L / min of air flow rate for

each cases.

• That’s mean if the water flow rate and air flow rate is increase that makes water stopping in the column, that also mean there is no dropping ,this case is called loading.

Conclusion

This experiment very important to study the meaning of loading and flooding points, and to know the type of packing material and how we can packed it.

 

Thank You