Efficient oil-containing sewage electric flocculation purification device

Abstract

The invention discloses an efficient oil-containing sewage electric flocculation purification device which comprises a water storage tank, an electric flocculation area and a purification area, wherein a water flow inlet and a water flow outlet are formed in the water storage tank; the water flow outlet is connected with the electric flocculation area through a first water outlet tube; a pluralityof cylindrical multi-loop electric flocculation devices are arranged inside the electric flocculation area; water outlets of the cylindrical multi-loop electric flocculation devices are connected with the purification area through second water outlet tubes; a compulsive air floating area, an inclined plate sedimentation area and a foam capturing area are arranged inside the purification area; aninclined plate sedimentation device is arranged inside the inclined plate sedimentation area; the compulsive air floating area is positioned below the inclined plate sedimentation area; a pressurizingair floating device is arranged inside the compulsive air floating area; the foam capturing area is positioned above the inclined plate sedimentation area; a foam capturing device is arranged insidethe foam capturing area. The device is good in separation effect, high in integration degree and relatively simple and convenient in mounting management, and the overall height of the device can be lowered while an electric flocculation effect is ensured.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a high-efficiency purification device for electrocoagulation of oily sewage. Background technique [0002] At present, most oilfields in my country have entered the stage of tertiary oil recovery. Compared with conventional water flooding oil production wastewater, tertiary production water not only has high water temperature, high salinity, large bacterial content, residual chemical agents and other substances The addition of polymer makes it have problems such as high viscosity, serious emulsification, strong ability to carry suspended solids, large floating or sinking resistance of oil droplets and solid particles, and serious adsorption loss to chemical adsorbents. At present, the commonly used oily sewage purification technologies mainly include: physical method, chemical method and biological method, but the above methods have problems such as large energy consumption, hi...

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Problems solved by technology

[0004] Traditional electrocoagulation devices are prone to passivation, require regular cleaning, and are difficult to expand; the sewage with the same flow rate occupies a large area, there are dead water areas, the electrode water ratio is small, and the energy consumption is high.

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