Chemical tower equipment: 【Question of the Day】2011.04.15

Bauer rings feature low pressure drop, high flow rate, and high efficiency.

Due to the many openings on the wall of the Pall ring packing, gas and liquid inside the packed tower can pass through these openings freely, which results in a much better distribution of gas and liquid within the packing layer compared to Raschig rings. In particular, the inner surface of the packing rings is easily wetted by the liquid, allowing for full utilization of that inner surface. Therefore, packing made of the same material and with the same specifications as Bower rings not only has a higher throughput capacity and lower pressure drop compared to Raschig ring packing, but it also improves the separation efficiency of the tower and increases its operational flexibility. Generally, under the same pressure drop, the processing capacity of Bower ring packing is more than 50% higher than that of Raschig ring packing ； At the same processing capacity, the pressure drop of the Pall ring packing is only half that of the Raschig ring.

Reply to 1# wu_pb: Higher specific surface area and lower resistance

Low voltage drop, high throughput, high efficiency

The Pall ring packing is an improvement over the Raschig ring; two rows of rectangular openings are made in the side walls of the Raschig ring. One side of the cut wall remains connected to the surrounding surface, while the other side bends inward to form inward-extending tabs, the sides of which meet at the center of the ring. Due to the openings in the wall of the Bower ring, **it improves the utilization of the space inside the ring as well as its inner surface; there is less air resistance, and the liquid is distributed evenly. Compared to Raschig rings, the gas flux of Pall rings can increase by over 50%, while the mass transfer efficiency improves by about 30%.

Reply 1# wu_pb 1) Strong mass and heat transfer capabilities. (2) Since the packing void ratio reaches 94–95%, it is not prone to clogging, nor is it susceptible to foam entrainment, which is advantageous for operating under variable conditions. 　 (3) The pressure drop is low; the resistance per meter of packing is approximately 10 mm of water column ； (4) Easy to install, low manufacturing cost ； (5) A fairly low density (0.9 kg/m3), resulting in a light weight of the final product.

A Pall ring is created by making one or two layers of openings in the wall of a Raschig ring, with the openings in the upper and lower layers arranged offset from each other. The slatted window blades are connected to the ring wall on one side, while the other side bends inward toward the center of the ring, where they almost meet; the bending directions of the upper and lower layers of blades are opposite to each other. Due to the openings, which connect the inner and outer surfaces of the ring as well as the surrounding space, the liquid and gas can be distributed evenly; as a result, the resistance, flux, and mass transfer efficiency are significantly improved compared to the Raschig ring.

The Bower ring was developed as an improvement over some of the main shortcomings of the Lassie ring; it features eight layers of rectangular windows on the wall of the regular Lassie ring, with the slats of these windows overlapping at the center of the ring, and the upper and lower layers of windows overlapping each other as well. Its main difference from Raschig ring packing lies in the rectangular openings provided on its side walls; the flaps of these openings bend inward toward the center of the ring. The presence of these openings in the ring wall results in a significantly improved distribution of gas and liquid compared to Raschig rings, especially as it allows for full utilization of the inner surface area of the ring. Key features: 1. High gas velocity, numerous blades, and low resistance; 2. Large specific surface area, which enables effective gas-liquid exchange. 3. This product features high production capacity, low resistance, and great operational flexibility.

1. It possesses extensive industry experience and has been thoroughly tested by various research institutions around the world. 　　2. The material thickness overcomes mechanical weaknesses, allowing it to be used in highly corrosive environments, thus enabling the use of cheaper materials. 　　 Pall ring packing 3: Its high specific gravity is superior to that of most other bulk packing materials

It features low voltage drop, high throughput, and high efficiency