Kason’s centrifugal screener features bag dump station
Kason Europe has introduced a new centrifugal screener designed to remove oversized contaminants from manually dumped bulk materials.
The Centri-Sifter features an integral bag dump station and dust collector, which removes bag scraps while protecting the operator and plant environment against dust contamination.
Configured for installation on a mezzanine, the system gravity-discharges into process equipment and has a low deck height for operators to dump sacks and other containers.
Ambient air and dust from dumping activities are drawn onto the exterior of two cartridge filters that derive vacuum from a top-mounted exhaust fan. Dust accumulated on the filter's exterior surfaces is dislodged by overcoming continuous negative pressure within the cartridge filters, with positive pressure introduced in short blasts on a timed cycle by pulse jet nozzles. Dislodged material falls into the screener while instant resumption of negative pressure collects any dust generated by the filter cleansing operation.
Centrifugal action created by rotating helical paddles accelerates the rate at which on-size particles pass through a horizontal screen cylinder. Oversize material is propelled through the downstream end of the screen cylinder to a discharge spout.
The Bag Dump Screener is constructed of stainless steel and finished to industrial and pharmaceutical standards.
The company has also launched a new classifier designed to eliminate contamination of ultra-pure products. The new Vibroscreen Gap-Free Classifier features non-metallic material contact surfaces and quick-cleaning features.
The 1524 mm diameter classifier is configured with three screening decks for removing oversize particles and de-dusting the material, while separating on-size material into two size fractions.
Interior surfaces of the screen frames are clad with PTFE, and screens are constructed of nylon, eliminating metal contact as required for the most metal contamination-sensitive bulk materials.
The screener is also equipped with gap-free screen frames, quick-release “U” clamps, radius corners, a domed lid, an Air-Lift device to raise the frames, and continuous ground and polished welds, allowing rapid, thorough cleaning between product runs and changeovers.
The external, interlocking flange configuration of the screen frame fully envelops the support ring of the screen, allowing the screen’s wire mesh to extend to the interior walls of the frame. The design eliminates the gap between the screen ring and frame wall of conventional screeners, where material typically collects.
The screener’s ‘Air-Lift’ system allows pneumatic raising and lowering of any screen frame section. Together with U-shaped quick-disconnect vertical clamps, the system provides rapid interior access for cleaning, inspection and/or screen changes, and allows one operator to perform what was previously a two-person task, depending on screen diameter.