EXAMPLES:
BED
MATERIAL
|
||||
FLUID PURIFICATION |
EXTRACTION |
CATALYSIS |
ION EXCHANGE |
LIQ/GAS REACTION |
Activated carbon |
Seeds(veg) |
Metals:Ni,Pt,Ag |
Cationic |
Hollow spheres |
Silica gel |
Plant matter |
Metal oxides, Vd, Cr, Mo |
Anionic |
|
Kieselguhr / Bentonite |
Malt |
Al-silicates, AIO, Si-gel |
Mixed |
|
Fibreglass |
|
|
|
|
Silica (sand) |
|
|
|
|
SHUTTLE PACKED BEDS Liquids:
Optimal pre-treatment with flocculating, coagulating and adsorbent
powders cause the adsorption and physical retention of sub-micronic
particulate matter that are the main cause of media blockages of such
operations as reverse osmosis. This clarification capability is out of the
reach of conventional high-speed centrifuges. Gases: Pretreatment with electrostatic loading devices
such as corona discharge cause the removal of sub-micronic
particulate matter by means of surface pre-charged shuttle packed beds. The
effective regeneration of these beds with the shuttle system explains the
marked advantage over prior art deep bed purification methods. SHUTTLE EXPANDED ELEMENTS Fluids: Filtration area densities of 50-100m2 /m2 floor
space are necessary for large scale industrial fluid processes requiring
separation in the NANO-MICRO particulate size range. Here again the purification technique does not rely on “pore”
filtration but on surface adsorptive phenomena. The aim is to adsorb
targeted submicronic particulate matter on electrostatically charged
surfaces of finely divided beds of filter media such as kieselguhr and
other silaceous matter supported on membranous expanded elements. Thereby
in effect the membranous material can function in reverse osmotic mode
without the danger of irreversible “blinding” of the pores. The shuttle function allows the application of element
regenerative techniques based for example on ultrasonics to reverse mild “blinding” conditions in
specially designed dedicated regenerative sections of the system. FILTER AID REGENERATION The used thin beds from the shuttle expanded elements are
sluiced into a separate system for regeneration and reuse. In effect this
is a counter-current washing system whereby the impurities adhering to the
surfaces of the particulate matter of the bed are removed. The regenerated
bed material is recycled to the central filter station now containing a set
of regenerated
shuttle expanded elements to continue the operations with minimal delay. SOLIDS RECOVERY Central to all liquid and solids processing industries are
universally applicable solids’ recovery equipment. Total recycling of used
fluids is dependent on the availability of such equipment. The basic Miller Filter design provides the possibility of full
automation of operations previously associated only with manual operation.