Treatment method and device for oily waste water

Abstract

The invention relates to the technical field of sewage treatment, in particular to a treatment method and device for oily waste water with high treatment efficiency and reasonable cost. Acid-base adjustment tank, aerobic microbial processor, secondary acid-base adjustment tank, anaerobic microbial processor, flocculation tank, filtration and clarification tank. The grids are distributed at equal intervals along the direction of waste water flow, and the oil-friendly and hydrophobic medium used to absorb oil is fixed on the degreasing grids; The chips are respectively connected to the high-voltage pulse generator outside the shell. Compared with the prior art, the present invention processes the macromolecular organic substances in the wastewater into small molecular structures through the high-pressure oxidizer, reducing the oxygen demand for later microbial treatment. It has obvious advantages such as reasonable structure, stable operation and high processing efficiency.

Description

[0001] Technical field: [0002] The invention relates to the technical field of sewage treatment, in particular to a treatment method and device for oily waste water with high treatment efficiency and reasonable cost. [0003] Background technique: [0004] A large amount of oily sewage needs to be treated in the petroleum and chemical industry. So far, there is no one method in the world that can meet and meet the oily sewage treatment requirements. And most of them deal with a fixed amount of sewage and a fixed oil concentration, lacking an integrated dynamic treatment method and its device. For decades, with the rapid development of the petroleum industry, the problems brought about by oil production, gas production and drilling All kinds of sewage have brought great harm to the natural environment and human health. According to statistics in 1998, the water production volume of oilfields across the country reached more than 1.4 million cubic meters per day. Due to the ha...

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Problems solved by technology

[0007] At present, the oil field mainly adopts gravity deoiling + coagulation + coarse filtration + fine filtration process, pressure deoiling (swirl flow, coarse granulation) + coagulation + coarse filtration + fine filtration process, air flotation + coarse filtration + fine filtration process Three sets of methods are used to control the oil content, suspended solids content, and median particle size of suspended particles in oily sewage. However, the above processes have many process steps, cannot effectively remove emulsified oil and organic matter, and cannot stably control the oil content and suspended solids content. , The median size of suspended particles is controlled within the range of water quality standards

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