Air flotation oil removal design

I’m also very interested in learning about this area. Regarding the re-injection of wastewater from oil fields, what is the cost of using air flotation for treatment?

-- There are specialized manufacturers for this. Specifically, it can also be found in some environmental books. --

This post was last edited by Yanmen Guan Wai on 2010-1-8 at 12:41. The core device is a dissolved air pump; it’s best to use an imported one. High-pressure aeration can also be used, but it requires an aeration tank capable of withstanding 7 to 8 kilograms of pressure. It is advisable to have a dissolved gas release device at the outlet of the dissolved gas water. Some chemical agents also need to be added, such as flocculants and coagulant aids; if treating an emulsion, demulsifiers are required as well. These are introduced into the pipeline through flow meters and injectors. The dosage and concentration of the chemical depend on the properties of the liquid to be treated; it is necessary to conduct pilot tests on-site, followed by scaling up, observation, and adjustment. The flocculated oil droplets are carried to the surface by the tiny bubbles in the aerated water, then scraped to the sludge tank by a scraper machine, and subsequently sent to the drying site via a sludge pump. The treated water can be discharged now. . The operating pressure of a typical dissolved air tank is around 0.4 MPa. Other parameters that need to be known are: treatment capacity, wastewater COD (BOD is also preferable), number of discharge stages, and treatment method (continuous or intermittent). In fact, given other conditions remain constant, it is only necessary to know the processing volume.

If emission restrictions become stricter in the future, devices such as filtration tanks and adsorption tanks can be added. A filtration tank is made by stacking sand and stones (quartz) of varying sizes according to their particle diameter, while an adsorption tank is generally filled with activated carbon of the same particle size. If the emission standards are not still met, an aerated biological filter can also be added. .

Aerated biological filter… that’s taking us off track~~~

I have also been working on air flotation recently; I will share what I have encountered, and I invite everyone to discuss it together. Air flotation consists of three processes, the first of which is bubble generation. There are many ways to generate bubbles, such as dissolved gas, electrolytic bubbles, and jet dispersers. Second, the bubbles come into contact with oil droplets or suspended particles. Third, once the bubbles come into stable contact with oil droplets or suspended particles, they rise to the oil-water interface and are removed there.

Reply to 5# Outside Yimen Pass: Yes, why did it end up being an aerated biological filter?

Use a separation tank divided into three compartments: the first one is used for inflation, while the second and third ones are used for overflow; two ultrasonic generators are employed to separate oil from water.

There is also a layer of oil contamination on the surface of our wastewater, and we are looking to deal with it. It would be ideal if the equipment required was minimal and easy to operate. Are there any good solutions?

-- What kind of oil stain is it? What about the ingredients? --