Products and Services

The Fluidized Drum Washer (FDW) is a highly efficient washer / fractionator / thickener with built in flexibility that allows for operating parameters to be adjusted during operation. This type of design makes the FDW the most versatile washer in the marketplace.

Key Benefits

• High Efficiency Ash, Ink & Micro-Stickies Removal
• Freeness & Yield Control
• Flexibility During Operation
• No Dropleg Required
• Long Fabric Life

High Efficiency Ash, Ink & Micro-Stickies Removal
The Fluidized Drum Washer is highly efficient at re-moving ash, ink, and micro-stickies from the pulp slurry. Typically, ash concentrations in the effluent stream can be as high as 20-30%, depending on the inlet ash concentration. Ink removal is also very high. Processing mixed office waste shows that removal efficiencies in the mid-to-high 90s are easily attained.

Freeness & Yield Control
The amount of washing or fractionation required for your mill is seldom constant. Grade changes and varying furnishes affect the amount of washing or fractionation required. The Fluidized Drum Washer is a controlled fractionator that allows you to decide how much or how little fractionation or washing is required.

The principal of operation behind the FDW is found in the method of applying the pulp to the fabric, or drum. Rather than using a conventional feed box, the pulp is sprayed onto the wire using feed headers and nozzles. By impinging the pulp onto the wire, the FDW does not rely on differential head pressure to "pull" fines, ash, ink and other washables from the pulp. The FDW "pushes" these particles away from the cleaned pulp slurry into the effluent stream. The equipment is controlled by the amount of "push" or impingement used. Much of this control can be implemented while the machine is in operation.

Flexibility During Operation
Operating flexibility is one of the primary reasons the FDW should be considered for washing or fractionation. Almost every parameter can be adjusted during operation, which greatly assists during process adjustments such as grade changes.

Possible adjustments to the unit easily made during operation are:

• The speed of the drum can be changed
• The nozzle impingement pressure on each header
• The compaction zone
• The vat level
• Shower water volumes and pressures

In addition, other changes are also easy to make:

• The angle of nozzle impingement
• De-inking bars
• Pre-impingement fiber mat
• Fabric changes

All other adjustments to the equipment that cannot be made during operation are quick and easy to implement.

GL&V Pulp and Paper Group, 1000 Laval Blvd., Lawrenceville, GA 30043. Tel: 770 963-2100; Fax: 770 822-2164.