Different Types of Packing Materials Used in Packed Tower

A good packing material provides a high surface area per volume since the mass transfer takes place between the liquid layer, forming on the packing element surface, and the gas going through the packing elements. The material of construction must provide a high liquid flow capacity through it to ensure a uniform liquid layer (good wettability) as well as a good resistance to the pressure (high strength). Finally, the pressure drop should be desirably low

Many diverse types and shapes of packing have been developed to satisfy these requirements.

They can be divided into two broad classes:

Packings with a regular geometry: stacked rings, grids, and proprietary structured packings.

Random packings: rings, saddles, and other shapes, which are dumped into the column and take up a random arrangement.

Features:

Depending on the application, packing may be random or structured. Random packings are a relatively inexpensive way to increase a cooling tower’s efficiency and capacity. Features include high distillation, absorption, and stripping efficiency; high strength to weight ratio; and a high specific heat transfer coefficient. Some products are comparable to pall rings in terms of mechanical strength and efficiency. Structured packings provide higher efficiency and lower pressure-drop than either random packings or trays. Products that are made of metal wire or plastic gauze are suitable for applications where low pressure-drop is important.

Tower packing manufacturers provide various types of random packings and structured packing depending on the application.

Random packing manufacturers and structured packing manufacturers use a variety of plastics and metals to manufacture the products. These materials include Carbon Steel, Stainless Steel, Monel, Nickel, PVDF, and Polypropylene among others..c.

Most Tower Packing manufacturers can suggest the material & type of packing depending on the process conditions and desired results.

Applications

Tower packings are used in various applications, including water treatment, direct-contact hot water production, oxygenation, degasification, absorption, desorption, rectification, extraction, desalting, drying, mixing, fish farming, biological filtering, and the treatment of greenhouse gases.

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