Different Types of Structured Packing

 

Structured Packing

Structured packing is a type of organized column packing where components are specifically prepared and put into geometric patterns. Unlike random packing, which fills the column with random structures.  Structured packing encourages fluids to travel down the column through complicated courses by inserting discs of honeycombed materials into the column. These extended, intricate routes increase the surface area where the liquid can come into contact with the packing material without obstructing gas passage.


A variety of design and material options are available for structured packaging. Among them are the following:


Knitted

The key part of knitted wire packing is a high-density mesh made of multi-strand wires. Depending on the requirements of the column and application, this mesh can be utilized as single layers or piled into almost solid bricks. Although it has a greater pressure drop than gauze packing, this type of packing provides a big surface area and effective mass transfer.


Gauze

A woven structure known as gauze is made of wire gauze material. The relatively small gaps produced by the tightly woven wires help to increase the surface area. This packing choice is ideal for applications requiring low liquid flow rates and places where the minimum pressure drop at each theoretical stage is necessary. This makes it the best option for processing pharmaceuticals, temperature-sensitive materials, and specialty chemicals.


Grid

There are two types of grid packing: stamped blades attached to panels and corrugated sheet packing. These packing types' thickness and flat surfaces make them extremely robust and fouling resistant. Grid packing types are the best option for prolonged operation in fouling applications, such as fractionation and wastewater treatment, because they are resistant to fouling.


Sheet Metal

Sheet metal is made up of bundles of textured metal sheets. This packing is strong, capable of handling a variety of liquid and vapor rates and process services, much less expensive than wire materials, and it can survive minor fouling. Some applications include vacuum and atmospheric distillation services and wastewater treatment functions.


Metals like carbon steel, copper, stainless steel, or titanium are frequently used to create the above packing types. Other materials including plastic, porcelain, and glass also come in alternatives for structured packaging. Applications involving the processing of crude oil make excellent use of plastics including polypropylene, PTFE, and PVC.


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