The fiber rotating disc filter is a solid-liquid separation system developed by our company for advanced water filtration and precise removal of suspended solids. Its core technology features multiple vertically mounted fiber cloth discs on a central drum, utilizing surface filtration to continuously separate microscopic particles from high-flow water with minimal energy consumption. This equipment is primarily used in scenarios requiring stringent control of effluent turbidity or suspended solids concentration, including advanced wastewater treatment, reclaimed water reuse, industrial circulating water purification, and landscape water maintenance applications.
- Structure and Working Principle
- Core structural composition
The device is an integrated filtration system, primarily comprising the following components:
- The filter disc assembly: multiple fan-shaped discs covered with dense fiber filter cloth, vertically mounted on a horizontal central drum, collectively forming a large cylindrical filtration surface.
- Central rotating drum and collection pipe: The rotating drum is used to support the filter disc and collect the filtered water; the filtered water enters the central collection pipe through the hollow rotating drum and is discharged.
- Backwash system: located above the filter cartridge assembly, typically comprising a negative pressure suction device (pump) and a matching nozzle for automatic cleaning of the filter cloth.
- The driving device: the driving center drum drives the entire filter disk group to rotate intermittently and slowly.
- Control system and electrical control cabinet: Integrated PLC that automatically controls filtration and backwashing processes based on liquid level differences or preset time intervals.
- Working Principle
The device periodically switches between two states: 'filtering' and 'backwashing'.
- Filtering state: Under gravity, the water to be filtered flows from the exterior of the filter disc through the fiber filter cloth into the interior, while clean water is collected into the central collection pipe for discharge. Solid impurities are retained on the outer surface of the filter cloth, forming a filter cake.
- Backwashing mode: When impurities accumulate on the outer surface of the filter cloth causing the water level to rise to the preset threshold (or after the set duration), the system automatically initiates the backwashing cycle. The drive mechanism rotates the filter discs slowly, while the vacuum nozzle positioned above them performs sequential suction across each sector of the discs. This process reverses the flow of filter residue from the cloth surface, effectively removing and discharging it. Backwashing is executed sequentially on only 1-2 filter discs, allowing the remaining discs to maintain normal filtration for continuous water discharge.
- Filtration precision and effluent quality: The system employs fiber filter cloth as the medium, typically with a pore size of 10 microns (selectable as needed), designed to reduce suspended solids in the effluent.
- Operating Mode and Energy Efficiency: The system employs a continuous "filter-local backwash" cycle, requiring only 1%-3% of the total water volume for backwashing. This design ensures minimal head loss and energy consumption during operation.
- Floor space: The vertical disc structure features a high filtration area-to-floor space ratio, potentially requiring less space than conventional filtration systems for equivalent processing capacity.
- Automated operation: The entire process is controlled by PLC, which automatically adjusts the backwash frequency based on water quality and load, enabling unattended operation.
- Modular design: The processing capacity of a single unit can be flexibly adjusted by adding or removing filter discs, facilitating phased construction or expansion of the project.
- Main technical parameters
|
Parameter item
|
Description / Customizable range example
|
|
single disc filter area
|
Standard design, typically 10-15 m² per unit (varies by brand and design)
|
|
Number of filter discs per set
|
Modular combinations are available based on processing capacity, with common configurations including 6-chip and 12-chip sets.
|
|
Filter precision (filter cloth aperture)
|
Common: 10μm, with an optional range of approximately 1μm to 100μm
|
|
design filtration rate
|
A common range of empirical values: ≤ 15 m³/(m²·h)
|
|
ratio of backwash water
|
It typically accounts for approximately 1% to 3% of the designed water treatment volume.
|
|
Device height (pool depth)
|
Typically requires an effective water depth of 2.5m to 4m.
|
|
Main material (water contact part)
|
Carbon steel corrosion-resistant, or stainless steel (304/316)
|
|
control method
|
Fully automated PLC control with level differential monitoring and automatic backwash cycle
|
- Typical Application Fields
This equipment is suitable for applications requiring deep filtration of suspended solids in water bodies, including:
- Advanced treatment in wastewater treatment plants: Designed for upgrading to Class A or higher standards, this system further reduces suspended solids (SS) in the effluent.
- Reclaimed water reuse system: A filtration unit for recycled water used in landscape water replenishment, greenery irrigation, industrial cooling, etc.
- Industrial water treatment: side filtration of circulating cooling water system, advanced treatment of production wastewater.
- Surface water purification: the circulation purification of landscape water and river and lake water.
- Other: Serves as a pre-filter in membrane treatment systems (e.g., MBR, RO).
en
