Steel Plant Cooling Water Filtration Belt Filter System

Steel Plant Cooling Water Filtration Belt Filter System

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

A Belt Filter Press is a sludge dewatering device that applies mechanical pressure to a chemically conditioned slurry, which is sandwiched between two tensioned belts, by passing those belts through a serpentine of decreasing diameter rolls. The machine can actually be divided into three zones: the gravity zone, where free draining water is drained by gravity through a porous belt; the wedge zone, where the solids are prepared for pressure application; and the pressure zone, where medium, then high pressure is applied to the conditioned solids.

Belt filter press principle

Many belt press designs and filtration processes are available, but all incorporate the following basic features: polymer conditioning zone, gravity drainage zones, low pressure squeezing zone, and high pressure squeezing zones. A belt filter dewaters biosolids or industrial sludges by applying pressure to squeeze out the water or liquid phase. Belt Filter Presses are available in a three-belt, a two-belt, and an extended gravity two-belt design. Advanced designs provide a large filtration area, additional rollers, and variable belt speeds that can increase cake solids.

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

Cost-effective installation: Economical to install, providing a budget-friendly dewatering solution.
Efficient energy use and automatic operation: Designed for minimal power requirements, it ensures low energy consumption and can operate automatically, reducing the need for continuous supervision.
Low operating costs: With its efficient design and operation, the BFP keeps operating costs to a minimum.
High capacity in a small footprint: Provides high dewatering capacity with minimal space requirements, making it ideal for facilities with limited space.
Good dewatering results: Delivers good dewatering performance, ensuring effective sludge management.

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

Belt filter presses can be used to dewater most biosolids generated at municipal wastewater treatment plants and are a common type of mechanical dewatering equipment.

Using mechanical equipment to dewater solids may not be the most cost effective alternative for wastewater treatment plants operating at less than about 4 mgd.

The selection of dewatering equipment should be based on the results of a site specific biosolids management plan which identifies both processing and end use alternatives and estimates costs.

It may be less expensive to haul liquid to an application site or pay a processing facility to dewater and process or landfill the dewatered cake.

Smaller facilities should also evaluate non-mechanical dewatering methods, such as drying beds or reed beds.

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