Equipment goods
Dissolved Air Flotation (DAF) systems remove suspended solids, fats, oils, greases and...
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Model | Capacity | Power(kw) | Dimension(m) | Nozzle list(DN) | |||||||
(m3/h) | Recirculation pump | Air compressor | Skimmer | Sludge scraper | L/L1 | W/W1 | H/H1 | Inlet | Outlet | Sludge outlet | |
SDAF-003 | ~3 | 0.75 | 0.55 | 0.18 | 3.4/2.2 | 2.4/1.7 | 2.4/1.9 | 80 | 80 | 100 | |
SDAF-005 | ~5 | 1.1 | 0.55 | 0.18 | 3.8/2.5 | 2.2/1.5 | 2.5/2.1 | 80 | 80 | 100 | |
SDAF-010 | ~10 | 1.5 | 0.55 | 0.18 | 5.1/3.8 | 2.4/1.7 | 3.0/2.4 | 100 | 100 | 100 | |
SDAF-015 | ~15 | 2.2 | 0.75 | 0.18 | 5.1/3.8 | 2.9/2.2 | 3.0/2.4 | 100 | 100 | 100 | |
SDAF-020 | ~20 | 3.0/5.5 | 0.75 | 0.18 | 5.4/4.1 | 2.9/2.2 | 3.0/2.4 | 150 | 150 | 150 | |
SDAF-030 | ~30 | 3.0/5.5 | 0.75 | 0.18 | 5.5/4.2 | 3.2/2.5 | 3.2/2.6 | 150 | 150 | 150 | |
SDAF-040 | ~40 | 4.0/5.5 | 0.75 | 0.18 | 6.5/5.2 | 3.2/2.5 | 3.2/2.6 | 200 | 200 | 150 | |
SDAF-050 | ~50 | 7.5 | 0.75 | 0.18 | 1.5 | 7.2/5.9 | 3.2/2.5 | 3.2/2.6 | 200 | 200 | 150 |
SDAF-060 | ~60 | 7.5 | 1.5 | 0.18 | 1.5 | 7.6/6.7 | 2.7/3.3 | 3.3/2.7 | 250 | 250 | 150 |
SDAF-070 | ~70 | 11 | 1.5 | 0.18 | 1.5 | 8.1/6.7 | 3.6/2.9 | 3.3/2.7 | 250 | 250 | 150 |
SDAF-080 | ~80 | 11 | 2.2 | 0.18 | 1.5*2 | 9.4/8.5 | 3.1/2.4 | 3.3/2.7 | 250 | 250 | 150 |
SDAF-100 | ~100 | 15 | 2.2 | 0.18 | 1.5*2 | 10.0/8.8 | 3.7/3.0 | 3.3/2.7 | 300 | 250 | 150 |
SDAF-120 | ~120 | 15 | 2.2 | 0.18 | 1.5*2 | 10.9/9.7 | 3.7/3.0 | 3.3/2.7 | 300 | 300 | 150 |
SDAF-150 | ~150 | 18.5 | 2.2 | 0.18 | 1.5*2 | 13.5/12.2 | 3.7/3.0 | 3.3/2.7 | 350 | 300 | 150 |
SDAF-200 | ~200 | 22 | 2.2 | 0.18*2 | 1.5*4 | 10.8/9.6 | 6.7/3.0 | 3.3 | 300*2 | 250*2 | 150 |
SDAF-300 | ~300 | 30 | 5.5 | 0.18*2 | 1.5*4 | 13.5/12.6 | 6.7/3.0 | 3.3/2.7 | 350*2 | 300*2 | 150 |
Application
As a waste water process, DAF clarifier is widely used in sewage treatment and water purification engineering. DAF clarifier is suitable for:
l Increase effluent recycling and fresh water reusing in paper and pulp
l Removal of heavy metal ions
l Separation of oil refinery effluent
l Removal of tannery wastewater
l Removal of chromaticity and impurities in printing and dyeing wastewater
l Solid-liquid separation of sewage and membrane after all kinds of bio-treatment
l Sludge concentration (capacity: 20%~ 30%, except the dedicated device which can be designed according to the requirements)
Pollutants in sewage can be divided into dissolved organic matter and insoluble matter (SS). Dissolved organic matter can be converted into insoluble matter. One of the methods of sewage treatment is to add coagulants and flocculants to transfer most of the dissolved organic matter to insoluble matter, and then clean up most of the insoluble matter. (SS) to achieve the purpose of purifying sewage, and the main method of cleaning SS is the use of air flotation.
After adding chemicals, the sewage enters the mixing zone of air flotation, and mixes with the released dissolved air water, so that the floc adheres to the fine bubbles, and then enters the air flotation zone. Flocculants float to the water surface under the action of air buoyancy to form scum. After the clear water from the lower layer flows to the clear water tank through the water collector, some part will reflux as the dissolved air water, and the remaining clean water flows out through the overflow outlet. When the scum accumulates on the surface of the air flotation tank, it will be scraped and discharged into the sludge tank.
During the air floatation process, a large number of fine and uniformbubbles (5 ~ 8 microns) are formed to form a three-phase mixture of airbubbles, water,and flocs (oil). They contact and adhere together to takeshape of air-containing flocs that float to the surface and are mechanicallyscrap by scum skimmer. Then water will be purified.
The theoretical basis of the air-dissolving process is Henry's Law meansthat in air-floatation system, air dissolves in water under high pressure andapproaches saturation, and is released under reduced pressure to normalpressure.
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