Defluorination filter

Operating principle

The defluorination filter adopts the double defluorination process of physical adsorption+ion exchange. The raw water flows through the special defluorination filter layer at a constant speed from top to bottom. The rich micropore structure and active groups in the filter material can accurately absorb and replace the free fluorine ions in the water, firmly lock fluorine elements, and effectively reduce the fluorine content in the water body.

During equipment operation, other water impurities are synchronously retained and filtered by the filter layer to ensure clean water quality; When the adsorption of filter materials approaches saturation, the system will automatically start the backwashing and regeneration process to recover the adsorption activity of filter materials through liquid regeneration and clean water flushing, without frequent replacement of filter materials, so as to continuously and stably produce qualified clean water meeting the national drinking water standard and realize long-term circulating fluorine removal.

Equipment configuration

The whole machine is designed in a closed and integrated manner, with uniform water distribution, no dead corner in filtration and corrosion resistance under pressure. The whole set of industrial configuration is suitable for 24h continuous water purification working condition. The core configuration is as follows:

• High-strength filter tank body: carbon steel rubber lined anti-corrosive or food grade stainless steel material can be selected. It is integrally welded and formed, which is resistant to pressure, seepage, corrosion and aging, and eliminates secondary pollution caused by tank body corrosion. It is suitable for complex groundwater quality conditions.
• Special fluorine removal filter material: high absorption modified activated alumina/bone carbon filter material is selected, with large adsorption capacity, high fluorine removal accuracy, good regeneration performance and low washing loss. Aiming at stable purification effect of high fluorine groundwater, it is suitable for different concentration fluorine exceeding the standard water quality.
• Full-automatic multi-way control valve: it is an intelligent electric/pneumatic control valve, automatically completing the whole process of filtration, adsorption, forward washing, backwashing, filter material regeneration and blowdown, supporting timed and differential pressure dual mode operation without manual operation.
• Uniform water distribution and collection system: upper and lower layered filter cap+porous water distribution structure, the water flow evenly penetrates the filter layer, without bias flow and short circuit filtration, and maximizes the adsorption performance of filter materials to ensure uniform and thorough fluorine removal.
• Pressure monitoring instrument: the front and rear high-precision pressure gauges monitor the pressure difference inside and outside the tank in real time, accurately judge the blocking and adsorption saturation status of filter materials, master the equipment operating conditions in real time, and conduct early warning maintenance in advance.
• Regenerative dosing system (optional): automatic metering regenerative chemical solution dosing device, accurate proportioning of regenerant, efficient recovery of filter material activity, greatly extending the service life of filter material and reducing operation and maintenance costs.
• Optional supporting system: PLC linkage control, online water quality fluorine content monitoring, pre-treatment and filtration, post-installed stabilized pressure water supply system can be installed, which is applicable to heavy high fluorine and high turbidity complex raw water.

Product advantages

H6>Special fluorine removal, high water quality compliance rate

The special design for excessive fluorine ion in groundwater and well water can accurately remove excessive fluorine in the water, and the fluorine content in the outlet water is stably controlled within the scope of national standard, so as to completely solve the safety problem of high-fluorine drinking water and completely meet the standards for drinking water and industrial production water.

H6>Renewable filter material with extremely low O&M cost

Different from the disposable filter element equipment, the special defluorination filter material supports multiple regeneration and reuse, without frequent replacement. After adsorption saturation, the defluorination performance can be recovered through simple regeneration process, with small loss of materials for long-term operation and strong economical efficiency.

H6>Full-automatic intelligent operation, saving heart and effort

Full-process automatic circulation operation, automatic filtration, automatic flushing, automatic regeneration, fault self-inspection, water shortage low-pressure protection, support 24-hour uninterrupted water supply, no need for specially-assigned personnel, and adapt to the continuous water supply demand of villages and towns and factories.

H6>one machine for multiple use, synchronously purified water quality

In addition to efficient fluorine removal, the equipment can simultaneously intercept sediment, suspended solids, colloid and trace impurities in water, reduce turbidity of water body, optimize water quality and taste, achieve dual effect of fluorine removal and water purification, without additional supporting filtration equipment.

H6>Wide adaptability to working conditions and flexible customization

The equipment specification, filter material ratio and regeneration scheme can be customized according to the fluorine content, turbidity and water consumption of raw water. Single unit operation and multiple units in parallel can be adopted. It is suitable for small civil water purification, large industry and centralized water supply of villages and towns.

Application Scenario

The equipment focuses on special treatment of high fluorine water quality to solve the problem of excessive fluorine in groundwater and well water. The core application scenarios are as follows:

• Drinking water safety project in rural areas: transformation of well water and groundwater in villages and towns in high fluorine areas to solve the problem of drinking water fluorine exceeding the standard;
• Purification of industrial production water: pre-treatment of high fluorine groundwater in the plant, mine and plant area to ensure that the production water meets the standard;
• Supporting facilities for commercial water purification system: deep purification of high-fluorine water sources for residential areas, parks and homestays, and adaptation to centralized drinking water projects;
• Pre-treatment of water treatment: fluorine removal and filtration at the front end of pure water, ultra-pure water and reclaimed water recycling system to protect the membrane equipment at the rear end;
• Public water supply transformation project: township water supply station, special treatment of high fluorine water quality of centralized water supply project.

Technical parameters

• Treatment water volume 1T/H - 300T/H (customized for multiple units in parallel)
• Core filter material modified activated alumina/efficient defluorinated bone char
• Fluorine content of outlet water of fluorine removal effect ≤ 1.0mg/L, meeting the national drinking water standard
• Working pressure 0.2MPa - 0.4MPa
• Control mode Full-automatic timing/differential pressure dual mode, automatic regeneration
• Tank material: carbon steel lined with rubber for corrosion protection/SS304/SS316L stainless steel
• Operating temperature 5 ℃ - 45 ℃
• Applicable to raw water, high-fluorine groundwater, well water, spring water and conventional surface water
• The filter material features repeated regeneration, large adsorption capacity and stable fluorine removal

After-sales guarantee

Provide a full set of services such as one-stop survey, scheme customization, installation and commissioning, and long-term operation and maintenance of the fluorine removal filter to fully guarantee the stability and compliance of the high fluorine water quality:

• Free water intake for fluorine content detection and site working condition survey, and customized special fluorine removal and purification scheme according to the fluorine concentration of raw water;
• The complete machine shall be delivered from the factory, the water, electricity and pipeline shall be quickly connected on site for installation and commissioning, and the regeneration and operation parameters shall be calibrated;
• One year warranty for the complete machine, special warranty for tank body, control valve, monitoring instrument and other core parts, and lifetime technical support;
• Hour all-weather after-sales response, quick remote troubleshooting of equipment faults, and on-site maintenance by nearby engineers;
• Provide lifelong value-added operation and maintenance services such as filter material regeneration, filter material replacement, tank anti-corrosion maintenance and system upgrading.