Oil-contained sewage treatment method and eddy energy fast-cyclone separating system of special equipment for method

Abstract

The invention discloses an oil-contained sewage treatment method and an eddy energy fast-cyclone separating system (Haynes) of special equipment for the method. Oil-contained sewage enters a multilevel cyclone speed three-phase mixer together with a prepared reagent and compressed air, the multilevel three-phase mixer makes the reagent be adequately contacted with the contaminants to form micro floc and makes the compressed air enter a releasing cavity after being adequately dissolved in the sewage, the dissolved gas in the floc is slowing released in the releasing cavity as the pressure is reduced, so the moisture inside the floc is squeezed out, the gas and solid floc form a porous hollow shape, the moisture content is remarkably reduced, the specific gravity is lighter, finally the floc after forming the scum enters a separating tank, the scum is scraped by a scraping machine above the separating tank, the scraped scum is discharged by a connected hopper to be subsequently dehydrated, the separated water overflows to a water outlet groove through a water outlet weir plate to be discharged through a water outlet pipe. According to the oil-contained sewage treatment method and the separating system, advantages of good treatment effect, reagent conservation, less sludge, less investment, simpleness in control, low maintenance expense and the like can be realized.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and is especially suitable for the treatment of oily sewage such as oilfield reinjection water, emulsified oil-containing wastewater, and kitchen wastewater. Background technique [0002] With the development of economy and society, wastewater pollution is increasing day by day, and environmental pollution is getting more and more attention from the people. Oily wastewater is common in many wastewaters, and it is easy to cause environmental pollution. Industrial and domestic wastewater is seriously harmful, and its treatment is domestic and foreign have drawn great attention. At present, oily wastewater will be produced in the process of oil exploration, oil refining, petrochemical industry, vehicle cleaning, machinery manufacturing, food processing, etc. Once oily pollutants enter the water body, they immediately spread on the water surface to form an oil film, preventing the water body from reo...

AI Technical Summary

Problems solved by technology

However, the existing traditional air flotation method has several disadvantages in the treatment of oily wastewater: oil slicks are difficult to handle, and the flotation time stays for a long time; sludge is easily deposited at the bottom of the air flotation tank, and the releaser is frequently blocked; The equipment occupies a large area and the investment cost is high; the integrity of the equipment is not complete and the installation is cumbersome; for the oily wastewater mainly emulsified oil and dissolved oil, the removal effect of traditional air flotation is not good

However, judging from the structural diagram attached to the patent, there are some problems in the discharge of the oil and bubble scum that rise to the top of the tank

Especially the offshore oil production platform or FPSO will be in a sloshing state due to the action of waves, waves, and currents. At this time, the liquid level inside the tank is difficult to maintain stable, resulting in excessive water content in the oil discharged from the device and the air bubble scum. High, which seriously affects the separation effect

[0012] From the above, it can be seen that the existing treatment technology is difficult to achieve a good treatment effect on oily sewage, especially when the components of oily sewage become more and more complex, It is becoming more and more difficult to deal with

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