Method for separating oil slick of waste cold-rolling fluid

Abstract

The invention discloses a method for separating oil slick of waste cold-rolling fluid. The device for separating oil slick of waste cold-rolling fluid comprises the following parts: 1, an oil discharging pond, 2, an oil discharging hole, 3, a waste oil pond, 4, a fluid outlet tube inlet, 5, a discharging valve, 6, a fluid outlet tube outlet and 7, a waste oil treatment station. In a production process, the cold-rolling fluid loses effect after being used for certain time and is changed; the waste cold-rolling fluid enters the oil discharging pond; the waste cold-rolling fluid in the oil discharging pond is discharged to the waste water treatment station through a pipeline and the discharging valve; when the discharging valve is opened and the liquid surface of the oil discharging pond is higher than the discharging valve, the waste cold-rolling fluid in the oil discharging pond is automatically discharged to the waste water treatment station without power under the action of the gravity force. When the liquid surface is lower than the discharging valve, the discharging is stopped and the oil slick does not flow to the waste cold-rolling fluid pond. The height of the liquid surface of the waste cold-rolling fluid of the oil discharging pond is controlled by the discharging valve, and the size of a discharging valve switch can be adjusted according to the volume of the waste cold-rolling fluid discharged to the oil discharging pond.

Description

technical field [0001] The invention relates to a method for separating floating oil, which is applied to a waste water treatment system, in particular to a method for separating floating oil of waste cold rolling liquid. Background technique [0002] In the industrial production process, the cold rolling liquid is a certain proportion of rolling oil, which is emulsified with water to form an emulsion, which plays a cooling and lubricating role in the cold rolling process. After using for a certain period of time, the cooling and lubricating effect decreases and the impurity content reaches a certain level, so it is necessary to configure a new cold rolling liquid. There are two kinds of oil in the replaced waste cold rolling liquid that need to be separated. One is the emulsified rolling oil contained in water. This oil is separated by the inclined plate type oil-water separator and discharged into the waste oil pool. The other is the waste oil floating on the surface of t...

AI Technical Summary

Problems solved by technology

This kind of dirty oil floats on the liquid surface, and the submerged pump cannot pump it into the inclined plate oil-water separator. Once it is pumped in, it will block the oil discharge hole of the separator.

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