apparatus for the production of elements of filling large exchange surface in plastic with a thin wall, marigida for biological purification plants to filter beds.and filling elements so obtained

摘要

Packing elements for the filling of biological treatment towers are produced from plastics by injection moulding, pref. from polyolefin polymers. They have many thin wavy walls, pref. with a satinised surface, which form groups of conical funnels from the spherical outside towards a spherical cavity in the centre. Such elements are very light in weight, yet they are strong enough to withstand the pressure in a reaction tower. The presence of 96% cavities results in an excellent retention capacity for gases. The alternating acceleration and deceleration in the conical funnels achieves a good mixing efficiency.