Porcelain Saddle Packing

High strength and uniform shape. CECEBE HP packing is made through a slip casting process which produces saddles of uniform shape within a narrow range of size tolerances. High quality clay of specially formulated chemical composition and controlled grain size distribution is used resulting in a saddle with very high crush strength and very low porosity. Acid absorption is less than 1 percent. Breakage during shipping and installation has typically been less than 0.1 percent.

Accurate prediction of packing volume requirements. The uniform shape of the CECEBE HP saddle and its extremely low breakage rate result in an accurate measure of the number of saddles required to fill an acid tower. In all applications, NORAM-CECEBE warrants that sufficient packing will be provided to fill the tower to the specified height.

Excellent mass transfer rates at low pressure drop. CECEBE HP™ packing is formed in the proven semi-toroidal saddle shape which provides random interlocking and uniform void space. This conventional shape has been modified to reduce pressure drop and promote mass transfer efficiency. Large apertures are provided at the hub of the saddle to break up the gas and acid streams, thereby reducing gas flow resistance and improving acid surface renewal frequency for enhanced mass transfer. Notches at the edges of the saddle wings provide additional acid drip points and promote surface renewal. These modifications and a slight increase in the No. 3 CECEBE HP™ saddle size, relative to the standard 3" saddle, result in significantly reduced flow resistance. The height of the CECEBE HP™ packing needed to achieve the necessary mass transfer efficiency remains the same as that of the conventional, lower capacity 3" saddle.

Pressure drop and mass transfer rates based on acid plant operating data. Correlations used to predict pressure drop and mass transfer efficiencies for CECEBE HP™ packing are based on empirical data obtained with accurate measurements made in operating acid plants.

High capacity and low pressure drop. CECEBE HP™ packing has a pressure drop which is typically half of that of a conventional 3" saddle. The gas throughput in an existing acid tower can conservatively be increased by about 25 percent. CECEBE HP™ packing is ideally suited to debottleneck acid towers.

Noram Engineering and Constructors Ltd., Granville Square, 400-200 Granville St, Vancouver, BC V6C 1S4. Tel: 604-681-2030; Fax: 604-683-9164.