Heavy metal separation dissolved air flotation machine

‌Heavy metal separation dissolved air flotation machineIt is a sewage treatment equipment that uses microbubbles to adsorb heavy metal ions and separate them by flotation. It is commonly used in industrial scenarios such as electroplating wastewater.

core principle

Using pressurized dissolved air technology, air is dissolved in water to form supersaturated dissolved air water, which is then released through a release device to produce 20-100 μ m microbubbles. Bubbles combine with suspended particles (such as heavy metal ions) in wastewater and float up to the surface, forming a scum layer to achieve solid-liquid separation. ‌

Applicable scenarios

• Electroplating wastewater: By adding coagulants, heavy metal ions are precipitated and adhered to bubbles to achieve removal effect.

• Industrial wastewater: suitable for the treatment of wastewater containing oil, suspended solids, and colloidal substances. ‌

Features of the equipment

• Efficiency: The removal rate of suspended solids can reach over 95%, and the COD removal rate is 65% -90%. ‌

• Strong adaptability: can adapt to different water quality by adjusting parameters such as pressure and chemicals. ‌

• Low energy consumption: mainly relying on water pumps and air compressors, with low maintenance costs. ‌

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Heavy metal separation dissolved air flotation machineThe stability of wastewater treatment is mainly affected by dissolved gas pressure, reflux ratio, residence time, and equipment operating parameters. It is necessary to optimize operating conditions to ensure separation efficiency.

Key parameter control

Dissolved gas pressure: It is recommended to stabilize at 0.35-0.45MPa. If the pressure is too low, the bubbles will be too large and the adsorption force will be weak. If the pressure is too high, the bubbles will easily burst. ‌

Reflux ratio: After treatment, clear water refluxes 20% -30% to the dissolved gas tank to ensure bubble production.

Retention time: The sewage stays in the air flotation machine for 20-40 minutes to ensure sufficient contact between the bubbles and flocs. ‌

Equipment stability guarantee

Automatic gas-liquid separation tank: When using a dissolved air flotation machine, the separation tank can be automatically adjusted, and frequent start stop does not require re adjustment, with stable performance. ‌

Micro bubble control: The ultra efficient shallow air flotation machine generates 5 μ m micro bubbles through energy dissipation devices, with bubble density hundreds of times higher than traditional equipment, improving separation efficiency. ‌

Key points of operation management

Scraping system: If the scraping speed is too fast or there is too much mud accumulation, it will cause the floating slag to break, and it needs to be cleaned regularly. ‌

Flocculating agent dosage: The dosage of the agent should be adjusted according to the concentration of suspended solids to avoid excessive or insufficient effects on the flocculation effect.