Screening systems

Screening is the mechanical separation of particles by physical size generally by passing the base material over a uniformly perforated surface that acts as a go/no go gauge. Particles above a certain size are retained above the surface while smaller particles pass through.

IHC Parts & Services designs and builds onboard screening towers for the production of sand or gravel to many different specifications. Installation design is optimized to a specific vessel and built to respond to the needs of varied screening tasks.

Two systems are currently favoured. The central screening tower with midships loading channel is the simplest but must be so designed to minimise interference with the loading and unloading process. The revolving system involves the installation of a rotatable screening tower to the side of the hopper. Because it can turn almost 300 degrees it can evenly spread material over the hopper thus improving the fill ratio, discharge unwanted fractions overboard and conveniently fill a transport barge moored alongside. Rubber liners protect vulnerable hardware and reduce noise emissions. Existing hopper dredgers can also be effectively retrofitted with screening hardware.

«« back to overview Auxiliary Equipment