Chemical Industry Liquid-Solid Separation Belt Filter Press

Chemical Industry Liquid-Solid Separation Belt Filter Press

Category： Belt Filter
Energy Consumption: <15 kW/h
Water Recycling: Closed-Loop System
Noise Level: <65 dB
Certifications: CE
INQUIRY EMAIL

Belt filter press description

A belt filter press (BFP) 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 BFP 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.

Belt filter press principle

Belt filter presses are manufactured as either two-belt or three-belt units. The current preference is that belt filter presses have three belts, which enables the gravity zone to operate independently from the pressing zones. Belt filter presses basically have three different zones:
■ gravity zone,
■ medium pressure zone (wedge zone), and
■ high pressure zone (shear zone).
Solids must be conditioned with polymer prior to being applied to a belt filter press. The polymer is used to release the water from the solids so that most of the water is removed on the gravity zone and additional water is then removed in the pressing zones. Approximately 60% to 70% of the water should be removed through the gravity zone with the remaining water removed in the wedge and shear zones.

Belt filter technical sheet

Sludge Kinds	Input Concentration %	Capacity m³/h	DS Capacity kg/h	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 Dyeing Mixed Sludge	1~3	10~25	180~350	75~78	3~10

Model selection

Model	Belt Width	Sludge Concentration	Outlet Concentration	Capacity	Power
DNT-1000	1000mm	2-4%	15-25%	6-12	1.49kW
DNT-1500	1500mm	2-4%	15-25%	12-15	2.05kW
DNT-2000	2000mm	2-4%	15-25%	15-25	2.6kW
DNT-2500	2500mm	2-4%	15-25%	35-50	4.1kW

Belt Filter Press Advantage

Low-profile structure for a smaller machine footprint and ease of access for operator (no platform needed).
Continuously increasing pressure for perfect dewatering.
Highest throughput of up to 50% more than comparable competitor machines.
Lowest residual moisture of final product thank to extended dewatering area (7, 8 or 12 S-rolls).
Flexibility increased by modular design.
Low energy requirement, reduction of polymer consumption, ease of maintenance, and hydraulic capacity increased for significant cost savings and best operator safety.

Belt filter press features

A choice of 2 or 3 belt dewatering systems with standard, extended, or independent gravity zones for consistently high cake solids in varying sludge conditions.
When higher hydraulic sludge capacities need to be treated, the drainage zone is extended by installing a thickening stage before the actual dewatering process
Increase of the effective filtration areas.
Innovative low pressure zone concept consisting of a big diameter perforated roll substitution in the traditional wedge area.
Effective high pressure zone (increase of pressure intensity and time).
The possibility to install 5-7-9-11 rolls in final high pressure zone allows the machine to be configured per the application characteristics and required performance.

Belt filter press applications

Wastewater Treatment: Belt presses process sludge by extracting moisture, which in turn reduces the volume. Consequently, this helps lessen waste transport and disposal costs.
Food and Beverage Industry: The process uses belt presses to produce juice from fruits such as apples and grapes. These presses allow for easy extraction of the press cake from the pulp.
Mining industry: In order to minimize the amount of waste material, it needs dewatering of mineral slurries. This process includes separation, recovery, and discharge of valuable minerals.
Agriculture: Farmers need to manage animal manures or other agricultural byproducts. Consequently, they do this to reduce their water content and decrease the volume of waste.