ABZ Micro-Drehfilter ®

In 1993 the ABZ Micro-Rotary Filter [MDF] was developed for fine separation of solids/liquids in the field of filtration technology for diverse process water cycles - in numerous applications – and has proven itself.
The MDF is a convincing combination of a filtering unit with integrated solid discharge and drainage unit. Specifically developed for varying flow rates and solid concentrations with very small grain and fiber sizes.

Advantages of the MDF

• Continuous filtration
• Perfect atmospheric operation
• Careful treatment and transport of the solids
• Low cost
• Filter cake makes finer discrimination than nominal mesh sizes [20 - 2000 µm] possible
• Optional cleanup by means of compressed air, industrial water or high pressure possible
• Solid discharge over spiral conveyors or discharge chute
• Level-steered drum revolutions
• No touching seals washers
• Drive system outside the wet area
• Completely enclosed machine
• Modular construction system
• Low total input
• Purely mechanical cleanup without chemicals and filter fleece

Function:

The material to be cleaned is sent to the MDF by way of a natural inlet and/or by pump.
The material flows into the filter drum and is drained statically. I.e. there is no dynamic and/or mechanical stress at the filter covering. Thus the filtration can be carried out by strongly abrasive material. The solids, which are larger than the nominal mesh size of the filter covering, are held back by the covering.
Also material, which is smaller than the nominal mesh size, is held back and separated by the filter cake structure.
The filtrate flows off downward through the covering and is re-conducted to the cycle and/or into drains. The solid parts held back at the filter are sent slowly upward and are drained by the drum rotating motion.

Depending upon use, the solids on the top of the drum, are sent from the MDF by means of release chute and/or discharge spiral with high pressure, compressor or water jet etc.
The subsequent treatment of the solids depends on use.
The following pictures are of projects put into practice:

MDF 1200/650/AS/L/P

- Used in fluff and fiber separation
in the textile industry

- Output approx. 10,000 l/h

- Filtration 55 µm nom.

MDF 1265 DL/AS/L

- Used as flotation filtration
in the food industry

- Output approx. 12,000 l/h

- Filtration 77 µm nom.

MDF 1500/2500/AS/L

- Used as pulp recovery and fiber separation
in the paper industry

- Output approx. 60,000 l/h

- Filtration 55 µm nom.