QL High-Efficiency Fiber Ball Filter

• Product Overview

The QL High-Efficiency Fiber Ball Filter is a deep-water filtration system developed by our company, utilizing spherical filter elements made of flexible fiber bundles. By leveraging the high specific surface area and adjustable porosity of the fiber ball media, this product delivers high filtration rates and precision, effectively removing suspended solids, particulates, oils, and colloidal substances from water. It is particularly suitable for advanced treatment or reuse processes where strict turbidity control is required.

• Structure and Working Principle

1. Core structural composition

The device is a vertical cylindrical pressure vessel, with its unique filter bed system as the core feature:

• Tank body: The primary pressure-bearing structure, typically constructed with carbon steel lined with rubber for corrosion resistance, stainless steel (SS304/316L), or fiberglass reinforced plastic (FRP).
• Fiber ball filter bed: Core filtration layer. The filter media consists of fluffy, porous solid spheres formed by wrapping highly elastic and oleophilic polyester or modified fiber filaments through specialized processes. When filled, the fiber balls create a dense and elastic three-dimensional mesh filtration layer.
• Water distribution and collection system:

• The upper porous water distribution plate ensures uniform water distribution.
• Bottom water collection/distribution device: employs a perforated plate with filter mesh or high-strength filter cap to collect clear water during filtration and evenly distribute water during backwashing.
  • Compression adjustment device (key design): Some models are equipped with adjustable upper pressure plates or pistons on the filter bed, which can apply moderate compression to the filter bed during filtration to regulate the porosity density of the filter layer.
  • Automatic backwashing system: Integrated valves and pipelines enable hydraulic stirring and water flushing for automatic operation.

2. Working Principle

• Filtration process: Raw water flows downward through the fiber ball filter bed. Due to the fine and elastic nature of the fiber balls, the water flow forms an ideal pore distribution with sparse upper and dense lower layers. Microscopic suspended particles are effectively captured by the mechanical interception and adsorption action of the fibers in the deeper layers of the filter bed, achieving deep and fine filtration.
• Backwash process: When the pressure difference reaches the set value, the backwash is initiated.

1. Loosen the filter bed: stop water inflow, and reverse wash water from bottom to top, so that the compressed filter bed fully expands and loosens.
2. The strong backwash water makes the fiber balls roll violently in the tank and rub against each other, and the impurities attached on them are stripped off.
3. Rinse and discharge: Continuous backwashing flushes the stripped contaminants out of the tank. The fiber balls regain their clean and fluffy state after backwashing.

• Core technical features
  1. The filtration system delivers high precision and excellent effluent quality: The ultra-fine fiber filaments (micron-scale) create a highly porous filter layer that effectively traps micron-sized particles, typically maintaining low effluent turbidity levels.
  2. High filtration speed and compact footprint: The filter bed exhibits high porosity, enabling operation at elevated filtration rates without excessive resistance. Its designed filtration rate is typically several times that of quartz sand filters, resulting in more compact equipment under the same processing capacity.
  3. Large capacity and long operation cycle: the depth filtration characteristic of fiber ball filter layer can accommodate a large amount of waste, the head loss increases slowly, and the filtration cycle is relatively long.
  4. Adjustable filtration precision: The compaction degree of the filter bed can be adjusted by the upper compression device, which enables the filtration precision and resistance to be regulated within a certain range to meet different influent water quality and treatment requirements.
  5. The backwashing process is thorough with relatively low water consumption: The unique hydraulic stirring backwashing method ensures full expansion and mutual friction of the fiber balls, resulting in superior cleaning efficacy. Due to its extended operational cycle, the backwashing water consumption per unit of produced water may demonstrate cost advantages.

• Main technical parameters

• Typical Application Fields

This filter is designed for fine filtration applications requiring high standards for effluent turbidity and oil content.

• The deep treatment and reuse of industrial wastewater: the oil removal and the precision filtration of suspended matter in the oil field reinjection water, the refinery and chemical wastewater, the metal processing wastewater, in order to meet the reuse or discharge standard.
• The circulating cooling water system, as the core equipment of the bypass filtration, effectively controls turbidity and oil content while enhancing the concentration ratio.
• Water treatment: pre-treatment of feed water for industrial boiler and ultrapure water for electronic industry.
• Municipal sewage advanced treatment: In tertiary treatment or reclaimed water processes, it serves as a security filtration or final purification unit after sand filtration.
• Seawater desalination pretreatment: to further reduce the turbidity and SDI value of seawater after multi-media filtration.