What Are the Advantages of Pall Ring Packing Over Raschig Ring Packing?

In chemical engineering, the filler refers to the inert solid materials installed in the packed tower, such as Pall ring and Raschig ring, etc., whose function is to increase the contact surface of gas and liquid and make them mix strongly with each other.

The Pall ring packing was developed to improve some of the main shortcomings of the Raschig ring. Eight layers of rectangular windows were opened on the wall of the ordinary Raschig ring. The small window blades overlapped at the center of the ring, and the upper and lower windows were mutually positioned. Overlapped.

Advantages of Bauer ring:

1. The main difference between it and the Raschig ring packing is that there are rectangular window holes on the side wall, and the window blades of the window holes are bent into the ring center. Due to the opening of the ring wall, the gas and liquid distribution performance is better than that of the Raschig ring. Great improvement, especially the inner surface area of the ring can be fully utilized.

2. Compared with the Raschig ring, this packing has the characteristics of large production capacity, strong resistance, and large operating flexibility. Under normal circumstances, the same pressure drop can be treated with 50%-100% larger Raschig ring, and the pressure drop during the same treatment It is 50%-70% smaller than the Raschig ring, and the tower height can also reduce the pressure. The Pall ring can be about 20%-40% of the packing volume than the Raschig ring.

3. Compared with the Raschig ring, the gas flux of the Pall ring can be increased by more than 50%, and the mass transfer efficiency can be increased by about 30%.

Pall rings are divided into ceramic, metal, and plastic Pall rings.

The ceramic Pall ring has acid and heat resistance, high and low temperature resistance, and aging resistance. It can resist corrosion of various inorganic acids, organic acids and organic solvents except hydrofluoric acid (HF), and can be used in various high and low temperature occasions.

Metal Pall rings are suitable for various separation, absorption and desorption devices, atmospheric and vacuum devices, synthetic ammonia decarburization and desulfurization systems, ethyl benzene separation, isooctane/toluene separation, etc.

Plastic Pall rings are currently suitable for the packing of large industrial towers.