Nutsche Filters & Filter Dryers Chemical

Pressofiltro® Series PF 2000 - PF 14000 Chemical design

Chemical design Pressofiltro® agitated Nutsche filters, suction filters or filter dryers are versatile units equally suited for monoproduction applications and for multipurpose production facilities. 

Big filters are available with manhole access. Smaller filters are available with submersible filter base to provide for good access to the filter internals to change the filter cloth. 

Available as closed units with manhole access or with an openable filter base to provide for good access to the filter internals to change the filter cloth, for cleaning as well as for inspection purposes. Interchangeable filter plates, with flat, homogeneous filter surfaces for good cleanability and inspection. Multilayer and/or conventional filter materials.

Good drying performance with special agitator design, large heat exchange areas.

 

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Inerting

Prior to feeding slurry into the agitated Nutsche filter or filter dryer the vessel interior is inerted by a controlled displacement of the oxygen containing atmosphere with Nitrogen. This procedure prevents the potential formation of an explosive atmosphere in the vessel interior.

The washing liquid is evenly distributed over the entire filter cake surface using a wash ring with spray nozzles. By again pressurizing the vessel interior the washing liquid is forced thru the filter cake, displacing any remaining mother liquor and is discharged the same way as the mother liquor during the filtration.


In the reslurry washing process the washing liquid is added to the vessel and mixed with the filter cake using the agitator. By again pressurizing the vessel interior the washing liquid is forced thru the filter cake, displacing any remaining mother liquor and is discharged the same way as the mother liquor during the filtration.

Technical data

Special properties for the customer’s benefit:

  • calculation, design and manufacture in compliance with Pressure Equipment Directive 97/23/EG or/and ASME pressure vessel code, Section VIII, with U-stamp
  • EG type examination certification 03ATEX0246X in accord with PED 94/9/EG or with UL-approved electrical components for operations in class 1, division 1 or 2, group C & D environment
  • shaft seal through stuffing box (compression gland), externally interchangeable
  • sampler valve
  • hydraulic pre-piping, pre-wiring on terminal box


Options:

  • double mechanical seal and bellows, double-acting mechanical seal, dry running contact or non contacting gas-lubricated (lift-off) or liquid-lubricated seals, externally interchangeable
  • metallic sealing discharge valve
  • openable filter bottom, with conventional C-clamps or bayonet locking system
  • autonomic PLC control or connected to PMSX

Technical data

Dryer
type
 
Internal
Ø
mm
Filter area

 
Nominal volume
l
 
Cake volume
max.
l
Speed
max.
1/min
Drive
kw
PF 2000 1600 2.0 2000 1000 30 18.5
PF 2500 1800 2.5 2500 1250 25 18.5
PF 3000 1960 3.0 3000 1500 25 22
PF 4000 2260 4.0 4000 2000 21 22
PF 5000 2535 5.0 5000 2500 18 30
PF 6000 2765 6.0 6000 3000 17 30
PF 7000 3000 7.0 7000 3500 16 37
PF 8000 3190 8.0 8000 4000 15 37
PF 9000 3390 9.0 9000 4500 15 45
PF 10000 3570 10.0 10000 5000 14 45
PF 12000 3910 12.0 12000 6000 12 55
PF 14000 4330 14.0 14000 7000 11 75