Rotating ceramic filter for concentration and rinsing of nanoparticle.
Ceramic Rotary Filter is a state-of-art filtering apparatus adopting ceramic filter media with ultrafine pores. It allows stable high-speed filtering of slurries containing nanoparticles by taking advantage of the cross flow filtration theory. A ceramic filter disk that is hollow inside is mounted to a rotating shaft in a sealed chamber. The filter disk rotates at high speed forming a flow parallel to the disk surface. The cake thickness on the ceramic filter disk is controlled thin and constant by the turbulent flow. As a result, filtration resistance of the filter disk is low and consistent, resulting in a high filtration rate maintained for a long time. The filtrate passed through the filter disk flows out through a channel of the hollow driving shaft. Concentrate or cake is discharged from the outlet on the end plate on the opposite side of the inlet. Models of large filtering areas are also lined up.
Ceramic Rotary Filter allows filtering of slurries with superfine particles, nano to submicron in size, since the filter disk has nanopores, 7 nanometers finest. It provides efficient treatments of slurries, such as concentration, rinsing, and solvent replacement. Taking advantage of effect of turbulence along the filter disk, difficult-to-process slurries, for example fibrous nanomaterials, are efficiently filtered.
The other type of the series, Rotary Filter, which is of a cloth filter type, is lined up for filtration of slurries with particles of size of micron to submicron.
Ceramic filters set in the shaft rotate at a high speed in the filter chamber with a pressure resistant structure. The slurry is pressurized and fed from the supplying port. The concentrated liquid is collected and the clean filtrate filtered by the ceramic filters passes through the hollow inside the shaft and is discharged outside.
Example: Nanoparticle filtration of titanium oxide (10 mass%) slurry.
|Approx. Dimensions (m)||Approx. Weight
|CRF-0||0.03||2.2 〜 3.7||1.0||0.6||1.2||500|
|CRF-1||1||3.7 〜 5.5||1.5||0.8||1.2||650|
|CRF-2||2||3.7 〜 5.5||1.5||0.8||1.5||750|
|CRF-5||5||7.5 〜 11||1.5||0.8||2.2||1200|