Fluorine containing wastewater treatment equipment

Fluorine containing wastewater treatment equipment

Fluorine containing wastewater treatment equipmentIt is a specialized equipment for treating fluorine-containing wastewater, mainly used in industries such as electroplating, semiconductor manufacturing, chemical engineering, and photovoltaics. These wastewater contain high concentrations of fluoride, which pose potential hazards to the environment and human health. Therefore, professional treatment equipment is needed to remove fluoride from the wastewater.

There are various types of fluorine-containing wastewater treatment equipment, including but not limited to the following:

Integrated defluorination wastewater treatment equipment: integrating multiple treatment processes, compact structure, small footprint, and high treatment efficiency.

combinatorialFluorine containing wastewater treatment equipmentComposed of multiple processing units, it can be flexibly configured according to actual wastewater treatment needs.

cabinet-typeFluorine containing wastewater treatment equipmentUsually used in small or medium-sized wastewater treatment systems, it has the advantages of compact structure and easy operation.

The working process of fluorine-containing wastewater treatment equipment:

preprocessing

Remove large suspended particles through grid filtration, adjust the equilibrium water volume of the tank, and adjust the pH value to a suitable range (usually neutral or weakly acidic). ‌

chemical precipitation

Add calcium salts (such as lime milk, calcium chloride) to react fluoride ions with calcium ions to form calcium fluoride precipitate, and promote the coagulation of suspended solids through coagulants. ‌

deep processing

Using ion exchange resin to adsorb residual fluoride ions, or removing soluble solids through membrane separation techniques such as reverse osmosis and nanofiltration. ‌

activated carbon adsorption

Further remove organic matter, residual chlorine, and fine particles from wastewater. ‌

Disinfection and discharge

After sterilization by UV, ozone and other methods, ensure that the effluent meets the discharge standards. ‌

Mainstream treatment technologies for fluorine-containing wastewater treatment equipment:

1. Chemical precipitation method

Calcium fluoride (CaF ₂) precipitate is generated by reacting with fluoride ions by adding precipitants such as calcium hydroxide and calcium chloride. When the fluoride content in wastewater drops below 15mg/L, it is necessary to use magnesium or aluminum salts in combination to enhance the removal efficiency, which can increase the efficiency by more than 40%. ‌

2. Adsorption method

Using activated alumina or natural mineral filter media, fluoride ions are removed through adsorption and ion exchange. After saturation of the filter material, it can be regenerated with aluminum potassium sulfate or sodium hydroxide solution, which can be reused for 30 years and is suitable for fluoride removal in drinking water. ‌

3. Biological treatment method

The use of microorganisms or biological enzymes to decompose fluoride in water is suitable for the treatment of low concentration wastewater, but is greatly affected by environmental factors. ‌

Typical equipment characteristics

Electrolytic aluminum wastewater treatment system: using multi-stage flocculation sedimentation+quartz sand+activated carbon+molecular sieve three-stage filtration, residual fluorine removal rate reaches 99.2%, suitable for high concentration industrial wastewater. ‌

Drinking water defluorination equipment: Fixed bed/fluidized bed design, filtration rate 3-12m/h, compatible with stainless steel tanks, operating cost of approximately 0.3 yuan/ton of water. ‌

Performance of Fluorinated Wastewater Treatment Equipment:

processing efficiency

Efficient and stable: Adopting a two-stage coagulation sedimentation system and multi-stage filtration technology (quartz sand, activated carbon, molecular sieve), the fluoride removal rate can reach 99.2%, and the effluent fluoride concentration can be stabilized below 5mg/L. Some equipment can even reduce it to below 2mg/L. ‌

Collaborative processing: Some equipment also has the function of removing iron and manganese. By adjusting the pH value and combining chemicals, multiple pollutants can be simultaneously removed.

Applicable scenarios

Industrial wastewater treatment: For high fluoride wastewater (fluoride concentration can reach over 1000mg/L) from industries such as electrolytic aluminum and fluorine chemical, it is suitable for terminal treatment of sewage treatment plants and purification of high fluoride surface water. ‌

Technical Features

Intelligent control: Some devices are equipped with automatic dosing systems and online monitoring modules, which can adjust process parameters in real time and reduce drug consumption. ‌

Modular design: supports quick installation and debugging, with a filtering speed of 8-10m/h and a small footprint.