BEW Rotocone Vacuum Filter Dryer is uniquely designed to Filter slurry under pressure or vacuum and to dry wet cake under vacuum only, for products which cannot be agitated either due to crystal breaking limitation or due to static charge generation limitation. It ensures clean and fast filtration. It is also possible to filter at a constant temperature, either low or high. Thorough washing of cake is done with controlled quantity of wash liquid, which can be recovered, reducing washing cycles and effluent discharge.
The closed operation ensures odourless and contamination free working conditions. Our unique design saves costly solvents, power, labor, floor space and time. It is well suited for Sterile applications. It provides economical and pollution free working environment.
BEW Rotocone Vacuum Filter Dryer does not require extensive foundation. It can be fitted on lugs or platform.
(Stationary R.C.V.F.D.) Feed Slurry is charged into R.C.V.F.D. preferably by gravity flow from Reactor installed above the R.C.V.F.D. or by slurry pump. Cake will form on filter bed.
If necessary, after first filtration, wash liquor can be sprayed on filter bed, and cake can be reslurried by manipulation of rotating R.C.V.F.D. movement, filtration can be then repeated. As many washing as necessary can be done till cake is free from all impurities and the quality is within acceptable limits.
Cake can be pressed applying Air or N2 pressure and some quantity of filtrate can be removed thereby. Final moisture content may be between 5% to 25% depending on the characteristic of solids in the slurry.
Drying : Filter unit can be provided with limpet coils or Jacket for heating of the vessel. In this process vacuum is applied on the top of the cyclonic Bag Filter, which will accelerate the drying process. The slow movement of R.C.V.F.D. along with high speed Chopper helps faster drying. Vapours will be generated inside R.C.V.F.D. which can be extracted and condensed by heat exchanger just above the receiver.
After Drying is over stop the R.C.V.F.D. in vertical inverted position by inching facility available on the Control Panel as shown in the Fig. (Keeping Filter media at top) Now open the hand hole flange and collect dry powder in the tray or container.