Doyen Belt Press for Sludge Dewatering

For over 10 years, Doyen commits in the design and manufacturing all types of environmentally-friendly belt filter press for many customers from different industries all over the world.

 

Characteristics of DOYEN type of belt press:

▲One-time investment, long-term use; Prompt, reliable and good service guarantee.

▲Customized design and high quality parts ensure a stable running and low maintenance cost (Belt lifetime can as long as 6-9 months)

▲Larger filtration area contributes to a larger capacity and lower solid content of filter cake!

▲Humanized operation (with PLC control), Low labor cost.

▲Unique design can save water consumption and electricity cost.

 

WORKING PRINCIPLE

For sludge dewatering which need a pre-floculation: After mixing with the prepared flocculation in the dynamic and static mixer, the small particles solids in the concentrated sludge would form bigger size of flocculated sludge and the free water is separated. Flocculated sludge is conveyed to the belt then it further goes to the gravity dewatering area. Under the gravity, free water would fall on the tray, and the rest sludge would be nipped between two belts. Then it would further goes to the wedge zone for pre-filtration, and then to low pressure zone and high pressure zone through the decreasing diameter rolls. Under the extrusion and shearing force, the solid and liquid is separated. Finally filter cake with expected low moisture content is discharged.

 

 

Flow chat for sludge dewatering:

 

For wet pulp dewatering:  After collecting the wet pulp, the pulp are conveyed to the feeding tray of belt press, then the wet pulp would be nipped between the two belts and run through 3 sets of dewatering roller. Finally the filter cake with low moisture content would be discharged.

 

 

Flow char for wet pulp dewatering:

 

Applications and dewatering capacity (for reference, will subject to the real situation)：

Material	Feeding moisture content（%）	Output moisture content (%）	Dewatering capacity (m³/hour)
Tapioca (Cassava) residue	75-95	65-75	6-10
Brewery residue	75-85	60-65	6-10
Coco peat	75-85	60-70	6-10
Potato residue	75-90	60-70	7-9
Chinese medicine tail residue	80-90	60-65	7-10
Paper mill pulp	98-99	70-75	20-22
Coal washing tailing	30-40	8-16	8-12