Fluidizing cone from Siperm R

Storing, mixing and discharging bulk powder products, e.g. many plastic powders, flour, cement etc., often cause problems. They do not flow freely, form bridges, tunnels and ‘rat-holes’ around the silo outlet and can only be removed easily by resort to some sort of a discharge aid.

A proven solution to such problems is the pneumatic dispersion units made from Siperm materials (Hp, R, B or GFK) from Tridelta Siperm. They are economical, highly reliable, efficient and occupy little space.

When fitting-out large silo areas with dispersion units, it is advantageous to divide them into sectors, which each of which can be interchangeably perfused. In this way it is possible to use a large perfusion area effectively with relatively little air. In most cases it is sufficient to compensate the pressure produced during loading with that of the fluidization medium blown-in.

Using that very last angle

Fluidization is the term for a special application in the modern turbulence technology for the handling of small particulate bulk materials. The pneumatic principle of fluidization permits the use of greater angles for discharge funnels. This increase in angle means dramatically increased savings in space and cost: whether optimising the use of existing space or saving on complete silos. This is a particularly attractive advantage not just in terms of saving space inside buildings but also metering devices for weighing systems.

An overview of Siperm fluidization materials

• specific selectable pore size
• an even air distribution across the entire surface area
• seamless construction throughout the perfusion element
• no accessory support structures needed
• high mechanical stiffness
• suitable for use with food-stuffs (Siperm R and Hp)
• high temperature resistance
• high chemical resistance
• long working life
• simple installation.

Siperm perfusion elements come in a wide variety of different forms: perfusion cushions and boxes, discs, tubes or funnels fitted with customer-tailored fastenings.

Homogenization and fluidized bed conveyance – the bulk material keeps on flowing

For homogenization purposes low flow rate perfusion is no longer adequate. The floors of homogenization silos mostly consist of highly porous Siperm plates. During operation of the plant it is important to ensure that the air speed is high enough to create an homogenous layer of turbulence sufficient to ensure the different components are adequately mixed.

In addition to fluidization and homogenization, highly porous Siperm materials are particularly suitable for the construction of fluidized-bed conveyors and for porous floor plates in (powder-) agitator tanks.