There are many types of fillers, which can be roughly divided into two types: solid fillers and mesh fillers. Solid fillers include annular fillers, saddle fillers, and fillers made of ceramics, metals, and plastics, such as grid fillers and corrugated fillers. The mesh filler is mainly a variety of fillers made of wire mesh. Several common fillers are described below.
1. Raschig ring packing. The Raschig ring filler was invented by Lacy in 1914 and is a ring of equal outer diameter and height. The gas-liquid distribution of the Raschig ring packing is poor, the mass transfer efficiency is low, the resistance is large, and the gas flux is small, which has been less used in the industry.
2. Pall ring packing. The Pall ring is an improvement on the Raschig ring. Two rows of rectangular holes are formed in the side wall of the Raschig ring. One side of the cut ring wall is still connected to the wall surface, and the other side is bent in the ring. The inwardly extending lingual leaves are formed, and the sides of the lingual leaves meet at the center of the ring. Due to the opening of the ring wall, the Pall ring greatly improves the utilization of the inner space of the ring and the inner surface of the ring, and the airflow resistance is small and the liquid distribution is uniform. Compared with the Raschig ring, the gas flux of the Pall ring can be increased by more than 50%, and the mass transfer efficiency is increased by about 30%. The Pall ring is a widely used filler. Our company produces and supplies stainless steel material Pall ring packing, ceramic Pall ring packing, PP material Pall ring packing and so on.www.yihaoptfe.com