What is the working principle of structured packing tower

The working principle of the structured packing tower is mainly based on the full contact of the gas-liquid two phases on the surface of the packing and efficient mass transfer, and its core characteristics are as follows:

Gas liquid countercurrent contact

The gas flows upward from the bottom of the tower, and the liquid is sprayed downward from the top of the tower, and the two phases are in countercurrent contact. This flow mode can make full use of concentration and temperature differences to significantly improve mass transfer efficiency.

Special structure of structured packing

The packing adopts corrugated plate, honeycomb and other regular arrangement structure, with high specific surface area and uniform porosity. For example, corrugated plate packing optimizes liquid distribution by corrugating Angle (e.g. 30° or 45°) to reduce wall flow phenomena; Honeycomb packing enhances gas-liquid disturbance through regular channels. This design allows fuller contact between gas and liquid and higher mass transfer efficiency than bulk packing.

Liquid distribution and redistribution

Liquid distributor: Located at the top of the packing layer, the liquid is evenly dispersed to the packing surface by spray or slot, ensuring maximum wetting rate.

Liquid redistributor: Set between multilayer fillers to collect and redistribute the liquid flowing down the lower layer, preventing the efficiency loss caused by ditch and wall flow.

Continuous contact and efficient mass transfer

The packing tower belongs to continuous contact equipment, the gas phase is continuous phase, and the liquid phase is dispersed phase. The composition of the two phases changes continuously along the height of the tower, and mass transfer is realized through the friction between the liquid film on the surface of the packing and the air flow.

The inner parts of the distribution tower of Hengerwo Chemical are designed reasonably and the distribution efficiency is enhanced.

Low resistance, high efficiency and flexible operation

The regular arrangement of the structured packing makes the void ratio as high as 95%, the pressure drop is significantly lower than that of the plate tower, and the liquid holdup is small (usually 1%-6% of the tower volume), the operation flexibility is large, and it is suitable for changing working conditions.

In conclusion, by optimizing the packing structure, gas-liquid flow path and distribution device, the structured packing column realizes the high-efficiency and low-consumption gas-liquid mass transfer process, which is widely used in the operation of chemical units such as absorption, rectification and extraction.