Original
By certification 
Introduction
DAF Dissolved Air Flotation machine in the water supply and drainage treatment process, solid and liquid separation technology and equipment is one of the key projects. Air flotation is one of the effective methods for the removal of small suspended particles whose specific gravity is close to water.
Technical Data
| Modle | Capacity | Dissolved air volume | Power KW | Dimension | DN (Nozzle list) | ||||||||
| m³/h | m³/h | Reflux pump | Aerator | Skimmer | Blender | L/L1 | W/W1 | H/H1 | iniet (A) | Outlet (B) | Sludge outlet (C) | Vent (D) | |
| WF-1 | ～1 | ～0.7 | 0.55 | 0.55 | 0.2 | 0.4 | 2.0/1.7 | 0.90/0.55 | 1.5/1.1 | 32 | 32 | 40 | 32 |
| WF-2 | ～2 | ～1 | 0.55 | 0.55 | 0.2 | 0.4 | 2.9/2.8 | 1.15/0.65 | 1.9/1.5 | 40 | 40 | 50 | 40 |
| WF-3 | ～3 | ～2 | 0.75 | 0.55 | 0.2 | 0.4 | 4.1/3.5 | 1.6/0.8 | 2.0/1.6 | 80 | 80 | 80 | 50 |
| WF-5 | ～5 | ～3 | 1.1 | 0.55 | 0.2 | 0.75 | 4.7/4.0 | 2.15/1.0 | 2.1/1.7 | 80 | 80 | 80 | 50 |
| WF-10 | ～10 | ～4 | 1.5/5.5 | 0.75 | 0.55 | 0.75 | 5.7/5.0 | 2.35/1.2 | 2.5/2.0 | 100 | 100 | 100 | 80 |
| WF-15 | ～15 | ～5 | 2.2/5.5 | 0.75 | 0.55 | 0.75 | 6.2/5.5 | 2.65/1.5 | 2.5/2.0 | 125 | 125 | 125 | 80 |
| WF-20 | ～20 | ～7 | 3.0/5.5 | 0.75 | 0.55 | 0.75 | 6.5/5.8 | 2.95/1.8 | 2.5/2.0 | 150 | 150 | 150 | 80 |
| WF-30 | ～30 | ～12 | 3.0/5.5 | 0.75 | 0.55 | 0.75 | 6.7/6.0 | 3.25/2.0 | 2.6/2.1 | 150 | 150 | 150 | 80 |
| WF-40 | ～40 | ～15 | 4.0/5.5 | 1.5 | 0.55 | 1.1 | 7.8/7.0 | 3.45/2.2 | 2.7/2.1 | 200 | 200 | 150 | 80 |
| WF-50 | ～50 | ～20 | 7.5 | 1.5 | 0.55 | 1.1 | 8.0/7.2 | 3.95/2.7 | 2.7/2.1 | 200 | 200 | 150 | 80 |
| WF-60 | ～60 | ～25 | 7.5 | 1.5 | 0.55 | 1.1 | 9.3/8.5 | 4.05/2.8 | 2.7/2.1 | 200 | 200 | 150 | 80 |
| WF-70 | ～70 | ～30 | 11 | 1.5 | 0.55 | 1.1 | 9.9/9.0 | 4.05/2.8 | 2.7/2.1 | 200 | 200 | 150 | 80 |
| WF-80 | ～80 | ～30 | 11 | 2.2 | 0.55 | 1.1 | 11.4/10.5 | 4.25/3.0 | 3.0/2.1 | 200 | 200 | 200 | 80 |
| WF-100 | ～100 | ～40 | 11 | 2.2 | 0.55 | 1.1 | 11.7/11.0 | 4.45/3.2 | 3.0/2.1 | 200 | 200 | 200 | 80 |
| WF-120 | ～120 | ～45 | 15 | 2.2 | 0.75 | 1.5 | 11.9/11.0 | 4.65/3.4 | 3.0/2.1 | 250 | 250 | 200 | 100 |
| WF-150 | ～150 | ～55 | 18.5 | 3 | 0.75 | 1.5 | 12.0/11.0 | 4.65/3.4 | 3.0/2.1 | 250 | 250 | 200 | 100 |
| WF-200 | ～200 | ～75 | 22 | 3 | 0.75 | 2.2 | 13.5/12.0 | 4.85/3.6 | 3.0/2.1 | 250 | 250 | 250 | 100 |
| WF-300 | ～300 | ～100 | 30 | 3 | 0.75 | 3 | 15.5/14.0 | 4.85/3.6 | 3.0/2.1 | 300 | 400 | 250 | 100 |
Product features
※ Small area, low power consumption, convenient operation and simple management;
※ The efficiency of dissolved gas is high, the treatment effect is stable, and the integrated control of machine, electricity and instrument is realized.
※ The device adopts GFA type dissolved gas system, it has a clever structure, and the dissolved gas efficiency is as high as 90%. It has a number of patented technologies and possesses super anti-clogging ability that other dissolved gas devices do not have.
※ The device adopts a new type of dissolved gas release device, which has a high degree of perfection of gas release, and the average particle size of microbubbles is only 15-30 microns.
※ The device adopts chain-plate slag scraper, which runs smoothly and reliably, and has high slag scraping efficiency.
Structure and working process
DAF dissolved air flotation equipment consists of air flotation tank body, dissolved air system, dissolved air return pipeline, dissolved air water release device, slag scraping device (combined type, driving type and chain plate type can be used according to user needs) and electronic control It is composed of cabinets and other components.
Air flotation separation technology means that under a certain working pressure, air and water dissolve the gas into the water to a greater extent, striving to be in a saturated state, and then release the formed pressure-dissolved gas water through decompression to produce a large number of fine bubbles , Fully contact with the suspended flocs in the water, so that the suspended flocs in the water adhere to the microbubbles, and float to the water surface together with the bubbles, forming scum and scraping off the scum, thereby purifying the water.
Air flotation mainly plays a role of solid-liquid separation (at the same time it can reduce COD, BOD, chromaticity, etc.). After adding the flocculant PAC or PAM to the raw water, after an effective flocculation reaction (time, dosage and flocculation effect must be determined by experiments), the raw water enters the combined air flotation contact area. In the contact zone, the microbubbles in the dissolved gas water and the flocs in the raw water adhere to each other and enter the separation zone together. Under the action of the buoyancy of the bubbles, the flocs and the bubbles rise to the liquid surface together to form scum. The scum is scraped to the sludge area by the scraping device. The clean water in the lower layer flows by itself to the clean pool through the water collection pipe. Part of the clean water is returned for use by the dissolved air system, and the other part is discharged.
Application
As a process of water treatment, air flotation is widely used in sewage treatment and water supply purification projects. This equipment is suitable for:
※ Papermaking white water pulp recovery and clean water reuse.
※ Removal of various heavy metal ions.
※ Separation of oil refining wastewater and oil pollution.
※ Removal of impurities in tannery wastewater.
※ Removal of chromaticity and impurities of printing and dyeing wastewater.
※ Various biological treatment, solid-liquid separation of biological mud membrane.
※ Sludge thickening (the processing capacity is 30%-50% of the equipment capacity).
http://www.wchjdaf.com/
