Introduction and origin of the PTFE Pall ring

- Jul 24, 2019-

The Pall ring packing is a new kind of packing, which is improved for some major shortcomings of the Raschig ring. It is a small rectangular window with six layers on the wall of the ordinary Raschig ring. The small window blades are placed at the center of the ring. The upper and lower window positions are formed by overlapping each other. The main difference between it and the Raschig ring packing is that there are rectangular window holes on the side walls, and the window leaves of the window holes are bent into the center of the ring. The distribution performance of the gas and liquid due to the opening of the ring wall is larger than that of the Raschig ring. The improvement, especially the inner surface area of the ring, can be fully utilized.

The PTFE ring developed on the basis of the tetrafluororazine ring is a layer of two or two rectangular holes on the side wall, and the base material of the small hole is formed without leaving the side wall. Blades bent inward.

Although the same size of the Pall ring and the Raschig ring have the same specific surface area and void ratio, the small hole of the Pall ring on the side wall can be used for gas-liquid circulation, so that the inner wall surface of the ring can be fully utilized.

Compared with the Laxi ring, the Pall ring not only has a large production capacity and a low pressure drop, but also has a high separation efficiency and a greatly reduced channeling