Two-stage gravity separation device for oil-containing wastewater treatment, and treatment process

Abstract

The invention discloses a two-stage gravity separation device for oil-containing wastewater treatment. The two-stage gravity separation device comprises a closed box body, wherein the bottom plate ofthe box body comprises a horizontal bottom plate and a first inclined plate, the horizontal bottom plate and the first inclined plate are sequentially connected from front to back, a second inclined plate is arranged in the box body, inclines upwards along the height direction from front to back, and divides the internal space of the box body into a first-stage treatment cavity and a second-stagetreatment cavity, the first-stage treatment cavity and the second-stage treatment cavity are not communicated to each other, a first corrugated plate group and a first oil separation and water passingassembly are arranged in the first-stage treatment cavity, and a second corrugated plate group and a second oil separation and water passing assembly are arranged in the second-stage treatment cavity. The invention further discloses a treatment process adopting the device. According to the invention, the device has the beneficial effects of short residence time, small occupation area, strong adaptability to raw water fluctuation, closed equipment body, no moving part in the equipment main body, simple structure, stable operation effect and low equipment cost.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a two-stage gravity separation device and a treatment process for oily wastewater treatment. Background technique [0002] With the rapid development of social economy, all kinds of catering institutions are expanding day by day, and the number has increased sharply, and the production of kitchen waste wastewater has also increased. Most of the wastewater contains oil. residual sewage. At present, the method of removing oil from kitchen waste sewage generally adopts the method of grease trap. Its main disadvantages are large area, high labor intensity, and poor decontamination effect. Although the separation effect of the method is good, the filter element is easy to block and has a short service life, and the replacement of the filter element is labor-intensive and costly. Contents of the invention [0003] The object of the present invention is to overcome the ...

AI Technical Summary

Problems solved by technology

At present, the method of removing oil from kitchen waste sewage generally adopts the method of grease trap, and its main disadvantages are large area, high labor intensity, and poor decontamination effect. Although the separation effect of the method is good, the filter element is easy to block, the service life is short, and the replacement of the filter element is labor-intensive and costly.

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