Both pilot plant and pilot scale test of distillation plant require Column Packing. The height of the Column Packing bed depends on the number of theoretical plates and the equivalent theoretical number of plates per meter (NTSM) of the Column Packing.  In order to compress the volume of Packed Tower,reduce the height of Packed Tower, it is necessary to choose laboratory packing with high theoretical plate number, such as Dixon ring,θring, Cannon ring, etc.