Tuesday, April 24, 2007
PACKED COLUMN
A packed bed is a hollow tube or pipe that is filled with a packing material. The packing can be randomly filled small objects like Raschig rings or else it can be a specifically designed structured packing.
The purpose of a packed bed is typically to improve contact between two phases in a chemical or similar process. Packed beds can be used in a chemical reactor, distillation process, or a scrubber, but packed beds have also been used to store heat in chemical plants. In this case, hot gases are allowed to escape through a vessel that is packed with a refractory material until the packing is hot. Air or other cool gas is then fed back to the plant through the hot bed, thereby pre-heating the gas feed.
A packed bed is a hollow tube or pipe that is filled with a packing material. The packing can be randomly filled small objects like Raschig rings or else it can be a specifically designed structured packing.
The purpose of a packed bed is typically to improve contact between two phases in a chemical or similar process. Packed beds can be used in a chemical reactor, distillation process, or a scrubber, but packed beds have also been used to store heat in chemical plants. In this case, hot gases are allowed to escape through a vessel that is packed with a refractory material until the packing is hot. Air or other cool gas is then fed back to the plant through the hot bed, thereby pre-heating the gas feed.
WHY PACKED COLUMN IS USED ?
Packed columns are preferred to tray columns- PROCESS WITH 2-PROCESS FLUIDS (liquid- gas, liquid-liquid, liquid-solid, liquid-vapor) are in contact and separation take place.
- LOW PRESSURE DROP (typically 0.35 - 2mm Hg per theoretical plate for packed column compared to 3.05m Hg for trays)
- HIGH CAPACITY
- LOW LIQUID HOLD-UP
- GOOD RESISTANCE TO FOULING
DESIGN & APPLICATION
Packed Column Design, an article from Cheresources, well known online Chemical Engineering information site, briefly describe step-by-step approach in packed column sizing.
Sizing of Packed Towers in Acid Plants, Cheresources - An application for Packed column with absorption of SO3 in the Interpass and Final Towers and recovers as product sulfuric acid...
FREE Packed Column spreadsheet from Cheresources .
Labels: Column, Design, Packed Column
posted by Webworm, 4:42 AM
1 Comments:
Nice info..Finepac Structures Private Limited is one of counted as packed tower internals Suppliers. Our internals are available in a variety of styles and materials, including ceramic, graphite, and many plastics. Some are liquid Distributors, Bed eliminators, Packing support plate etc.
Post a Comment
Let us know your opinion !!! You can use some HTML tags, such as <b>, <i>, <a>
Subscribe to Post Comments [Atom]
Home:
<< Home