Oil-containing sewage treatment apparatus and oil-containing sewage treatment method

Abstract

The invention discloses an oil-containing sewage treatment apparatus and an oil-containing sewage treatment method. The oil-containing sewage treatment apparatus comprises a water inlet, a water outlet, an oil stain removal part and a suspended matter removal part, wherein the oil stain removal part comprises an oil stain aggregation unit and an oil stain inclination plate precipitation unit, a first baffle is arranged between the oil stain aggregation unit and the oil stain inclination plate precipitation unit, the suspended matter removal part comprises an electric flocculation unit, a suspended matter inclination plate sedimentation unit and a sludge sedimentation concentration unit, a second baffle is arranged between the electric flocculation unit and the suspended matter inclinationplate sedimentation unit, the sludge sedimentation concentration unit is arranged on the lower portion of the suspended matter inclination plate sedimentation unit, and a third baffle is arranged between the oil stain inclination plate precipitation unit and the electric flocculation unit. With the apparatus and the method of the present invention, the removal rate of oil and suspended matter in sewage can achieve more than 95% without the adding of agents.

Description

technical field [0001] The invention relates to the field of water treatment, and more specifically, to an oily sewage treatment device and method. Background technique [0002] Most of the oilfields in my country are developed by water flooding, and many years of development have brought these oilfields into a period of high water cut. Due to the extensive application of various chemical agents in the process of oil production, coupled with the extremely complex biological, chemical, physical and other factors in the process of production, the characteristics of the reservoir and the composition of the produced fluid have undergone great changes. A large amount of crude oil is usually called oily sewage. [0003] The traditional oily sewage treatment technology mainly adopts chemical treatment method, which requires a large amount of dosing, high cost of chemicals, and large sludge output. Based on the above shortcomings, the electrochemical sewage treatment process has b...

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Problems solved by technology

At present, the research on electrochemical treatment of oily sewage is mostly focused on electrocoagulation, electric floatation, electrolysis, etc. Using the above electrochemical treatment methods usually consumes a large amount of electric energy due to chemical reactions, resulting in high power consumption. There will be disadvantages such as sacrificial anode and high cost of anode loss

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