'Liquid Hold-up' in a distillation column refers to down-coming liquid (liquid traffic travelling down the column) becoming trapped in the column's packing material.
Packing material is used in distillation columns to increase the contact efficiency between the down-coming liquid stream(s) and the up-flowing vapour stream(s). The packing materials do this by increasing the surface-to-volume ratio over which the vapour and liquid streams come into contact in order to promote separation between the more volatile and less volatile components in the column.
The down-coming liquid can become trapped in the packing material for a number of reasons. One example is when liquid becomes trapped in crack formations or fractures of the packing material (which can occur during normal or non-steady state column operation). When the liquid becomes trapped in these cracks/crevices, contact with the up-flowing vapour stream becomes non-existent and the liquid is literally 'held up' from travelling down the column.
A box column is a type of building column that is hollow and usually has a cross-section that is rectangular. They are often used in the construction of building additions like porches.
Drilling capacity in steel Tapping in steel Taper in spindle nose Spindle speed range Number of spindle Spindle feed range No of feeds Distance of spindle axis from column surface with spindle Distance between spindle face & floor level Rotation of arm around column Angle of drill head swivel from horizontal Power of spindle motor Distance between drilling spindle axis in horizontal Column traverse along bed Speed of column traverse along bed Total weight of the machine Max. Torque at spindle
Liquid is used in hydraulic systems.
It is fitted on discharge line after condenser, where the gas enters in liquid forms.
With a U form glass tube and filled with water.
When liquid holdup occurs, the repeated boiling and condensation on which the separation depends is interrupted and distillation becomes less efficient.
Thomas Holdup Stevens was born in 1795.
Sometimes: The amount of liquid phase required to fill the column with a liquid-vapor equilibrium. Other Times: The liquid that sticks to the column and makes it look "wet"
The duration of The Trail of the Holdup Man is 1200.0 seconds.
can you answer for me this question
The Great Filling Station Holdup was created in 1973.
The Trail of the Holdup Man was created on 1919-11-29.
The Holdup - 1915 was released on: USA: 17 December 1915
Edward Yen-Chung Kung is an author, educator, and artist known for his work in East Asian studies, philosophy, and Chinese martial arts. He has written scholarly articles and books on topics such as Confucianism, Taoism, and Chinese calligraphy.
The fractionation column is used to separate components of a liquid by distillation.
the meniscus
I think you mean the meniscus