Dissolved air flotation units.
Micro-bubble flotation for suspended solids, oil and grease — supplied as full-tank nano, shallow-tank and horizontal-flow units and sized to your flow and discharge standard.
What dissolved air flotation removes
Dissolved air flotation separates suspended solids, oil and gelatinous substances by attaching them to micro-bubbles. A recycled stream of water is saturated with air under pressure; when it is released into the tank, the pressure drops and the air comes out as a dense cloud of fine bubbles. The bubbles attach to particles and carry them to the surface, where a skimming device removes them, while matter denser than water settles to the bottom and is drawn off to the sludge tank. The units saturate at about 0.5 MPa, and the three ranges below differ mainly in tank geometry: a full-tank nano design, a shallow-tank high-rate design and a horizontal-flow design.
Full-tank nano dissolved air flotation (CXCF series)
In the full-tank design the released air is spread across the whole tank rather than a single contact zone, so suspended solids, oil and grease meet a large bubble surface area before the flow leaves the separation zone. The unit combines flotation, sedimentation and thickening in one tank, and the air it releases is roughly 20 to 40 times the volume of the recycled dissolved-air water. It is intended for removing suspended solids from industrial and domestic sewage and is used in chemical plants, textile printing and dyeing, electroplating, paper making, oil refining, food processing and leather manufacture. A pump charges air into the saturator at about 0.5 MPa; on release, the dissolved air forms a dense cloud of bubbles that absorb suspended matter as it rises, so suspended solids and COD are removed.
| Model | Capacity (m³/h) | Dissolved-air water (m³/h) | Return pump (kW) | Scraper (kW) | Air compressor (kW) | Saturator vessel (mm) | Dimensions L × W × H (m) |
|---|---|---|---|---|---|---|---|
| CXCF-5 | 5 | 4.5 | 3 | 0.12 | 1.5 | Φ400 | 3.8 × 2.5 × 2.3 |
| CXCF-10 | 10 | 4.5 | 3 | 0.12 | 1.5 | Φ400 | 4.6 × 2.5 × 2.3 |
| CXCF-20 | 20 | 8 | 5.5 | 0.12 | 1.5 | Φ500 | 5.2 × 2.9 × 2.3 |
| CXCF-25 | 25 | 8 | 5.5 | 0.12 | 1.5 | Φ500 | 5.5 × 2.9 × 2.3 |
| CXCF-30 | 30 | 12.5 | 5.5 | 0.12 | 1.5 | Φ500 | 6 × 2.9 × 2.3 |
| CXCF-50 | 50 | 25 | 7.5 | 0.37 | 2.2 | Φ600 | 7 × 3.3 × 2.5 |
| CXCF-80 | 80 | 25 | 7.5 | 0.55 | 3 | Φ600 | 8 × 3.8 × 2.5 |
Dimensions are reference values reproduced from the factory catalogue and are approximate. Final dimensions and weights are confirmed against the site conditions and the actual build.
Super-efficiency shallow dissolved air flotation (CXQF series)
The shallow-tank design keeps the effective water depth between 600 and 750 mm and the retention time down to about 3 minutes, with a surface loading rate of 10 m³/m²·h. The shallow tank makes floating impurities easy to collect, which suits high-density sewage, and both the water level and the skimming depth are adjustable. Suspended-solids removal is above 90 percent and the floated sludge can be concentrated to about 35 percent. The range is widely used in municipal sewage, paper making, wastepaper recovery, painting, dyeing, chemical engineering, food processing, brewing, tanning, oil refining and pharmaceuticals; in many cases it can take the place of biochemical treatment equipment, since one round of physical and chemical treatment brings the water to standard, and it is also applied as pre-treatment in water works.
| Model | Max capacity (m³/d) | Diameter (mm) | Total disc height (mm) |
|---|---|---|---|
| CXQF-65 | 1500 | 4000 | 1100 |
| CXQF-100 | 2200 | 5000 | 1100 |
| CXQF-200 | 4500 | 7000 | 1125 |
| CXQF-250 | 6000 | 8000 | 1150 |
| CXQF-320 | 7500 | 9000 | 1150 |
| CXQF-420 | 10000 | 11000 | 1200 |
Dimensions are reference values reproduced from the factory catalogue and are approximate. Final dimensions and weights are confirmed against the site conditions and the actual build.
Horizontal-flow dissolved air flotation (CXPF series)
In the horizontal-flow design the flow crosses the separation zone from one end of the tank to the other, a configuration that suits high suspended-solids loads and steady sludge scraping. It is intended for removing suspended solids, oil and gelatinous substances and is applied in slaughterhouses, electroplating plants, chemical engineering, paper making, oil refining, and textile, printing and dyeing wastewater treatment. The system dissolves air in the water under pressure; as the pressure is released, the bubbles adhere to suspended matter and lift it to the surface, where a skimming device removes it, while denser matter descends and is released to the sludge tank. At the 0.5 MPa saturating pressure, suspended-solids removal is above 90 percent and COD removal above 70 percent.
| Model | Capacity (m³/h) | Dissolved-air water (m³/h) | Main motor (kW) | Scraper (kW) | Air compressor (kW) | Saturator pump model | Air compressor model | Saturator vessel (mm) | Dimensions L × W × H (mm) |
|---|---|---|---|---|---|---|---|---|---|
| CXPF-5 | 4–5 | 1.5–2 | 3 | 0.55 | 1.5 | V-0.1/8 | 11/2GC5-1 | Φ400 × 1000 | 3000 × 2200 × 1900 |
| CXPF-10 | 8–10 | 2–3 | 3 | 0.55 | 1.5 | V-0.14/7 | 11/2GC-5 × 2 | Φ500 × 1500 | 4000 × 2200 × 2400 |
| CXPF-15 | 10–16 | 3.5–5 | 3 | 0.55 | 2.2 | V-0.14/7 | 11/2GC-5 × 2 | Φ500 × 1500 | 4500 × 2200 × 2400 |
| CXPF-20 | 15–21 | 5–7 | 7.5 | 0.55 | 2.2 | V-0.14/7 | 2GC-5 × 2 | Φ500 × 1500 | 5000 × 2700 × 2400 |
| CXPF-30 | 20–30 | 6–10 | 7.5 | 0.55 | 2.2 | V-0.14/7 | 21/2GC-5 × 2 | Φ500 × 1500 | 6000 × 2700 × 2400 |
| CXPF-40 | 30–40 | 8–13 | 7.5 | 0.75 | 2.2 | V-0.14/7 | 21/2GC-6 × 2 | Φ600 × 1800 | 6000 × 3000 × 2400 |
| CXPF-50 | 40–50 | 15–20 | 7.5 | 0.75 | 2.2 | V-0.14/7 | 1S65-40-200 | Φ600 × 1800 | 6500 × 3100 × 2400 |
| CXPF-60 | 50–60 | 18–27 | 7.5 | 0.75 | 2.2 | V-0.14/7 | 1S65-40-200 | Φ600 × 1800 | 7000 × 3100 × 2600 |
| CXPF-80 | 70–80 | 24–32 | 7.5 | 0.75 | 2.2 | V-0.14/7 | 1S80-65-160 | Φ600 × 1900 | 9000 × 3100 × 2600 |
| CXPF-100 | 90–105 | 30–35 | 10 | 1.1 | 3 | V-0.36/7 | 1S80-50-200 | Φ700 × 2000 | 11000 × 3100 × 2600 |
| CXPF-150 | 125–150 | 60–80 | 15 | 1.1 | 3 | V-0.36/7 | 1S150-80-400 | Φ700 × 2000 | 13000 × 3700 × 2600 |
| CXPF-200 | 175–200 | 80–100 | 15 | 1.1 | 3 | V-0.36/7 | 1S150-80-400 | Φ800 × 2100 | 14000 × 3700 × 2600 |
| CXPF-250 | 225–250 | 100–120 | 15 | 1.1 | 3 | V-0.36/7 | 1S150-80-400 | Φ800 × 2400 | 15000 × 3700 × 2600 |
| CXPF-300 | 280–300 | 120–180 | 22 | 1.1 | 3 | V-0.67/7 | 1S150-125-400 | Φ1000 × 2900 | 16000 × 3700 × 2600 |
Dimensions are reference values reproduced from the factory catalogue and are approximate. Final dimensions and weights are confirmed against the site conditions and the actual build.
Applications
Municipal and industrial sewage
Removing suspended solids, oil and grease from domestic and industrial sewage in chemical plants, textile printing and dyeing works, electroplating lines, paper mills, oil refineries, food processing plants and tanneries.
Oil refining and petrochemical
Separating oil and grease from refinery wastewater, where the fat content can be brought down to below 10 mg/L.
Slaughterhouses and food processing
Removing fat, suspended solids and gelatinous matter, with COD removal of about 70 percent and suspended-solids removal of about 90 percent.
Electroplating and metal finishing
Removing heavy-metal ions such as zinc, copper and lead at concentrations below 50 ppm, with removal above 70 percent.
Paper making
Recovering fibre from paper-making white water, where the recovery ratio can reach about 95 percent.
Textile, printing and dyeing
Removing colour and suspended solids, with colour removal of about 90 percent and COD removal of about 60 to 70 percent.
Delivery
Units are assembled and tested at our factory before shipment, then shipped with export documentation. Loading arrangement and delivery schedule: [to be confirmed with factory].
