Black Clawson DNT200 ash washer/ thickener 150 TPD

Size: 200 cm
Capacity:150 t/day
Year: cca 2000
in refurbished condition ( optional )
Drive 33 KW

description: The DNT Washer is ideal for removing ink, ash and other contaminants from a variety of furnishes. High speed dewatering permits efficient removal of ink and ash from fiber, producing high tonnages of thoroughly washed stock in a compact space. The unit is cantilevered to use an endless wire and is available in two sizes - the Model 100 and 200. The DNT has high feed stock capacity and efficient washing, and is dewatered multiple times to produce highly washed and thickened stock before it is discharged from the washer.

General Technical parameters:
Wire width: 1980 mm
Speed: 600–1200 m/min
Couch roll motor: 85 kW
Screw speed: 360 rpm
Screw motor: 7.5 kW
Knock-off spray water: 230 l/min @ 7 bar
HD spray water: 50 l/min @ 28 bar
HD spray motor: 0.25 kW
Inlet consistency: 0.6–0.8%
Inlet flow: 200–220 t/day (atro)
Ash content inlet: 20%
Ash content outlet: 2–3%
Outlet consistency: 6–10%
Outlet production: Approx.160 t/day (atro)
Freeness (inlet): 35–45° SR
Inlet pressure: 1 bar
Pressure drop: max. 0.5 bar

General machine parameters:
Stock Inlet
• Welded stainless steel construction (1.4571)
• Distribution pipe with 16 nozzles for uniform stock flow
• Outlet width: 1730 mm
• Slot width: 8.5 mm

Rolls
• Two rolls with steel tube bodies
• Roll heads: 1.4571, journals: 1.4542
• Rubber covering: 22 mm
• Breast roll: grooved
• Couch roll: smooth
• Roll diameter: 762 mm

Roll Bearings
• Four high-performance pillow block bearings
• Grease-lubricated
• For breast and couch rolls

Doctor Blade
• Non-contact oscillating doctor blade
• Blade: 12 mm 1.4571 stainless steel, length 1930 mm
Wire
• Seamless triplex polyester wire
• Width: 1980 mm
• Two guide strips

Spray Pipes
Knock-off spray pipe (fixed):
• 1.4571 stainless steel
• 19 flat spray nozzles (3 mm / 60°)
• Pressure: 7 bar
• Water consumption: 230 l/min

• Integrated cleaning and drain system
High-pressure cleaning spray pipe (oscillating):
• 1.4571 stainless steel
• 19 needle nozzles (Ø 1 mm)
• Pressure: 28 bar
• Water consumption: 50 l/min (fresh water)
• Electromechanical oscillation, 200 mm stroke
• Gear motor: 0.25 kW

Drive System
• Couch roll drive:
o V-belt drive
o Recommended: frequency-controlled motor
o Wire speed: 600–1200 m/min
• Screw conveyor drive:
o Fixed speed: 100 rpm
o Gearbox included

Discharge Screw
• Screw and trough welded from 1.4571 stainless steel

Cantilever Design
• Allows use of endless wire
• Two removable cantilever blocks (operator side)
• Material: 1.4571 stainless steel

Wire Tensioning System
• Two interconnected lifting spindles
• Adjustment via handwheel (operator side)
• Material: 1.4571 stainless steel

Machine Frame
• Fully welded stainless steel frame (1.4571)
• Includes cantilever system

Cover Hood
• Welded stainless steel (1.4571)
• Inspection openings on operator and drive sides

Catch Pan
• Welded stainless steel (1.4571)
• Rectangular recess at couch roll end

Space Requirements
• Length: 3365 mm
• Width: 3175 mm
o 2600 mm for wire change
• Height: 1830 mm

Weight
Approx. 6500Kg