AF-BELT - Veolia Water Solutions & Technologies
AF-BELT - Veolia Water Solutions & Technologies
AF-BELT - Veolia Water Solutions & Technologies
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Aquaflow’s <strong>AF</strong>-Belt twin wire press is specifically designed<br />
for pulp & paper mill sludge dewatering applications.<br />
<strong>AF</strong>-Belt is ideally suited for applications, where sludge<br />
inlet consistency and quality vary and for sludge mixtures<br />
with significant biosludge content. <strong>AF</strong>-Belt is designed<br />
to operate at low wire speeds in order to reach the highest<br />
possible dewatered sludge cake dryness (30 - 50 %)<br />
depending on ash and biosludge content.<br />
<strong>AF</strong>-<strong>BELT</strong><br />
TWIN WIRE PRESS<br />
Aquaflow Sludge Dewatering Technology<br />
<strong>AF</strong>-Belt twin wire press dewaters sludge mixtures by<br />
pressing the sludge between two continuous wires.<br />
The dewatering is arranged in three dewatering<br />
sections. The chemically conditioned sludge flows<br />
across the gravity and wedge section through the<br />
S-curve section, where pressing begins and finally,<br />
through the pressure nip rolls, where the sludge is<br />
squeezed.<br />
Aquaflow can provide complete sludge dewatering<br />
systems including chemical conditioning, predewatering<br />
(thickening drum or gravity table) and<br />
dewatered cake handling equipment.
Easily changeable foils enhance the water removal and<br />
support the wire. Effective side seals allow a thick sludge<br />
cake and clear filtrate.<br />
Final sludge pressing between the high pressure nip<br />
roll pairs.<br />
design and operational benefits:<br />
• Suitable for mixtures of biological, fibreous,<br />
deinking and chemical sludges<br />
• A wide inlet consistency range of 0.5 - 10 %<br />
• A high sludge thickness and effective pressing<br />
due to a slow wire speed<br />
• The completely sealed side structure allows<br />
a thick sludge cake and clear filtrate with<br />
minimum spills<br />
• A compact design including a flocculator and<br />
thickening drum<br />
• Flexibility for process variations<br />
• Easy start-up and operation<br />
• A quick wire change either with a continuous or<br />
wire joint cloth<br />
• A low specific energy consumption (~5 kWh/BDt)<br />
• Fully automatic control options<br />
• Option: Central lubrication and effective wire<br />
washing with automatically brushed shower pipes<br />
<strong>AF</strong>-Belt is available in 2.0 and 2.8 meter wire<br />
widths to accommodate a wide range of design<br />
capacities. <strong>AF</strong>-Belt is constructed from stainless<br />
steel with a simple robust frame which provides<br />
an extremely rigid structure to maintain the<br />
roll alignment and to reduce the life cycle<br />
maintenance costs.<br />
Aquaflow provides full mechanical and<br />
performance guarantees for <strong>AF</strong>-Belt. We can<br />
also provide complete sludge dewatering<br />
systems including chemical conditioning and<br />
pre-dewatering to add value to your treatment<br />
systems.<br />
Currently more than 200 <strong>AF</strong>-Belt twin wire<br />
presses are successfully operating throughout<br />
the world in the sludge dewatering applications<br />
of the pulp and paper industry.<br />
Headbox Wedge zone S-Rolls Nip-Rolls Discharge<br />
doctor<br />
Aquaflow Ltd.<br />
P.O. Box 116, 57101 Savonlinna, Finland<br />
Tel. +358 (0) 207 441 600, Fax +358 (0) 207 441 699<br />
www.aquaflow.fi
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