What are the types of structured packings

The types of structured packings are mainly classified according to their structural characteristics and materials, including the following categories:

1. Classification by structure

Corrugated packing

Vertical ripple type: The corrugated plates are vertically arranged, and the adjacent two plates are interleft at 90°, which is divided into plate ripple type and net ripple type.

Plate ripple type: corrugated plate stamping holes or rolling grooves, enhance liquid distribution and wettability, suitable for large diameter tower and high load scene 125678.

Mesh ripple type: made of metal wire mesh, low pressure, high separation efficiency, often used in the distillation of difficult to separate and heat sensitive system 125678.

Horizontal ripple type: the direction of the ripple is parallel to the tower axis, and the application is less 12.

X type and Y type: according to the Angle of the ripple (X type 30°, Y type 45°), X type pressure reduction, Y type mass transfer performance is better 125678.

Non-corrugated packing

Grid packing: composed of strip units, such as grich grid, mesh grid, etc., suitable for low pressure drop, large load and anti-blocking scenes.

Pulse packing: Assembled by hollow prisms with shrinking necks to form alternating shrinking and expanding flow channels to strengthen turbulent mass transfer, suitable for vacuum distillation and large tower diameter scenes 5678.

Other structures: such as ring, spherical, sheet packing, respectively for different separation process49.

Second, by material classification

Metal packing: such as stainless steel, copper, aluminum, etc., high strength, corrosion resistance, suitable for high temperature and high pressure environment 124.

Plastic packings: such as polypropylene, polyethylene, light weight, low cost, suitable for general chemical and environmental protection fields.

Ceramic packing: high temperature resistance, good chemical stability, used in high temperature reactor 124.

Composite packings: Combine the advantages of multiple materials to improve mass transfer efficiency and corrosion resistance4.

3. Typical application areas

Structured packings are widely used in chemical, petroleum, environmental protection and other fields, such as:

Distillation separation: metal wire mesh corrugated packing for difficult separation system 125678.

Gas purification: plastic sheet corrugated packing for environmental protection and separation and purification 12.

Water treatment: Honeycomb inclined pipe, straight pipe for water purification and sewage treatment12.

For more information about specific models or performance parameters, refer to the relevant industry standards or manufacturer's documentation 49.