The Pall Rings in Degasser Tower

Main features of pall ring:

1, high gas speed, many blades, low resistance

2, the specific surface area is large, can fully solve the gas-liquid exchange.

3, the product has the characteristics of large production capacity, small resistance, and large operation flexibility.

Suitable for carbon dioxide degassing tower, ozone contact tower and other reactions as contact fillers.

pall ring packing is a new type of packing, which is improved for some main shortcomings of rasping ring. It is formed by opening eight layers of rectangular small Windows on the wall of ordinary rasping ring. The small window blades overlap in the center of the ring, and the upper and lower layer Windows intersect. The main difference between it and rasping ring packing is that there is a rectangular window hole on the side wall, and the window blade of the window hole is bent into the ring center. The distribution performance of gas and liquid is greatly improved compared with that of rasping ring due to the opening of the ring wall, especially the inner surface area of the ring can be fully utilized.

Pall ring product features: Pall ring packing has the advantages of large flux, small resistance, high separation efficiency and large operating flexibility, under the same pressure reduction, the processing capacity can be more than 50% larger than the rasping ring. At the same processing capacity, the pressure reduction can be reduced by half, and the mass transfer efficiency can be increased by about 20%. Compared with the rasping ring, this kind of packing has the characteristics of large production capacity, strong resistance, and large operating elasticity. Under normal circumstances, the same pressure drop is 50% larger than the rasping ring, the same pressure drop is 50%-70% smaller than the rasping ring, and the tower height is also reduced. The use of Pall ring can be about 20%-40% of the packing volume than the rasping link.

Scope of application of Pall ring: It is suitable for carbon dioxide degassing tower, ozone contact reaction tower, etc. as contact packing and other reaction towers.

The metal Pall ring packing is made of metal sheet, and two rows of window holes with protruding tongue blades are opened on the ring wall. Each row of window holes has five tongue leaves, each tongue leaf bent to the ring, pointing to the ring center, almost at the center of the tower, the position of the upper and lower two layers of window holes staggered each other, the total area of the general hole is about 35% of the entire ring wall area, so that the gas and liquid in the tower can be freely passed from the window, the Pall ring packing is still the main ring packing.

Pall ring packing is a kind of open-hole ring packing with equal height and diameter, Pall ring each layer of window hole has 5 tongue leaves, each tongue leaf bent to the ring center, the upper and lower two layers of window holes are opposite staggered, the general hole area accounts for about 30% of the total area of the ring wall. It has the characteristics of large voidage, low pressure drop and mass transfer unit height, high flooding point, full vapor liquid contact, small specific gravity and high mass transfer efficiency. This structure improves the vapor and liquid distribution and makes full use of the inner surface of the ring, thus allowing the gas and liquid in the packed tower to pass freely through the form.

Pall ring shape structure can be divided into internal ribs for the rice type, called plastic Pall ring (m); The inner rib is a well shape, called a plastic Pall ring (well).

The Pall ring is formed by opening two layers of Windows on the wall of the lacey ring, and the upper and lower layers of window holes are staggered. The edge of the window blade is connected with the parent wall of the ring wall, and the other edge is bent toward the ring and almost butt at the center of the ring. The bending direction of the upper and lower two layers of blades is opposite. Due to the opening of the hole, the surface and space inside and outside the ring are communicated, so that the liquid and gas are evenly distributed, so that the resistance, flux and mass transfer efficiency are significantly improved compared with the rasi ring.

The structure of the Pall ring improves the distribution of vapor and liquid, making full use of the inner surface of the ring, so that the gas and liquid in the packed tower can pass freely through the form.

pall ring packing is to open a two-layer rectangular window on the wall of the ordinary rasping ring, and the small window blades are overlapping in the center of the ring, and the upper and lower two-layer Windows are staggered, so the resistance is reduced, the gas velocity can be improved, the gas and liquid phase distribution is uniform, the same pressure is reduced, and the processing capacity is more than 5% higher than that of the rasping ring.

Plastic Pall ring is widely used in filling towers in petroleum, chemical, chlor-alkali, gas, environmental protection and other industries.