Description
Belt filter press Information
Belt Filter Press ,it is also mainly used for processing the sludge which is not concentrated in the thickening pool(such as A/O residual sludge,SBR residual sludge),it also has two functions:concentration and dewatering.Its structure is different from rotary drum thickening belt dehydrator,the sludge is dehydrated by the belt gravity,this device is used in the higher capacity.
DAGYEE belt presses are ideal for efficient dewatering of sludge from municipal and industrial wastewater treatment as well as fresh water production at waterworks. We offer two different models that comes in different sizes.
How belt filter presses work
A belt filter press provides sludge dewatering by pressing the sludge to force the water through a permeable medium. The process produces a cake (the dewatered product) having a dry solids (DS) content of 30% or more in the case of primary sludge. This is to be distinguished from the lower-energy gravity belt thickener process which achieves a maximum DS content of ~10%.
A combines drainage and mechanical pressure sequentially to remove water. The equipment normally comprises 2−3 recirculating belts, with two belts combining at some point to compress the sludge and squeeze water from it.
The conditioned sludge feed is first conveyed along a gravity drainage section of one of the porous belts, as with a gravity belt thickener. It is then subject to pressure as it is passed between two recirculating belts, forming a wedge zone at the inlet, which travel over a roller.
This squeezing action from the two belts in this pressure zone releases more water.
Belt filter presses Technical
|
Sludge kinds |
Input concentration % |
Capacitym3/h.m |
DS capacitykg/h.m |
Moisture of cake% |
PAM consumption%(DP/DS ) |
|
Unconcentrated aerobic sludge |
0.5~1.5 |
15~30 |
150~300 |
~80(+2) |
2~5 |
|
Concentrated aerobic sludge |
2~4 |
6~12 |
200~300 |
~80(+2) |
2~5 |
|
Digested sludge |
3~6 |
7~15 |
300~400 |
<80 |
2~5 |
|
Unconcentrated primary sludge |
0.8~2.0 |
18~35 |
300~400 |
<80 |
2~5 |
|
Concentrated primary sludge |
3~5 |
6~12 |
300~400 |
≤80 |
2~5 |
|
Paper making activated sludge |
0.5~2.5 |
15~35 |
200~400 |
<78 |
3~7 |
|
Printing and dyeingmixed sludge |
1~3 |
10~25 |
180~350 |
75-85 |
3~10 |
Belt filter presses Advantage
BEARING FRAME Made of two very thick carbon steel plates (on request, SST), fixed to each other by means of profiles and welded to form a stiffen perfectly levelled unit. The whole structure is protected by sand-blasting type Sa 2.5, then by a zinc-aluminium alloy hot spraying and finally covered by a layer of bicomponent polyurethanic resin. Bolts and nuts are made of SST A2 AISI 304. (Ref. A)
ROLLERS The pressing, tensioning, transmission and sludge discharge rollers are protected by a layer of 8mm of rubber. The motorized pressing roller and the trajectory correction one are coated by 8 mm. of rectified rubber layer. All the rollers are supported by ball bearings type ‘Y’ which are suitably sized and guarantee a perfect impermeability. (Ref. B
BELTS TRACTION SYSTEM Models with belts width of 800, 1200, 2000 mm.: it consists of a worm motor variator with speed manual adjustment, directly keyed to the roller; Models with belts width of 1600, 2500, 2600, 3000 mm.: it consists of an epicyclic motor variator connected to a traction roller by a toothed crown and chains protected by carters. (Ref. C)
BELTS GUIDE SYSTEM Pneumatic type with proportional action probes to keep the belts continuously centered and one upon the other. (Ref. D)
BELTS TENSION SYSTEM It consists of pneumatic jacks with air springs which keep the belts tensioned. (Ref. E)
BELTS WASHING SYSTEM It consists of spray header pipes equipped with nozzles which can be cleaned by a specia plan (Ref. F)
Belt filter presses Features
• Available in 8 roller and 12 roller designs in the pressure section • Extended gravity deck model for thinner sludges Sludge • Open frame design allows for maximum access for normal maintenance • Enclosed design available ensures any odours, aerosols and spillages are contained • Adjustable wedge dewatering zone for process optimization • Pre-installed hydraulic system for automatic belt tensioning and steering • Lifetime rated bearings Features description Sludge/polymer mixer valve • Variable orifice, in-line polymer mixer that combines polymer and sludge instantly • Optimizes polymer effectiveness and minimized polymer consumption Gravity drainage zone
Belt filter presses Benefits
•Heavy-duty all-welded main frame assures component alignment
•Modular construction allows variable roller configuration for maximum process flexibility
•Designed for continuous automatic operation requiring minimal operator attention and low maintenance
•Open design provides easy access to all components Epoxy over zinc coated frame provides maximum corrosion resistance
•Pneumatic belt tracking and tensioning provides clean, safe operation with maximum reliability
•Standard, extended, independent, or dual gravity zone for versatile, effective dewatering performance
