Apparatus and method for treating water containing white oil stain

Abstract

The invention relates to a process method for treating wastewater containing white oil and a device thereof. The method comprises the following steps: connecting raw materials to a preheater through a raw material pump valve and a sealed pipeline, wherein the preheater is provided with a temperature control box to keep the temperature of the preheater constant; putting the preheated raw materials into an oil-water separation tank; putting the white oil separated out from a discharge opening of the oil-water separation tank into a white oil storage tank through a white oil buffer tank; and directly discharging the wastewater up to standard separated out from the discharge opening of the oil-water separation tank. A flow stabilizing component can make liquid flow in a separator distributed evenly so as to avoid short troubles and channeling of the liquid flow and obtain higher oil-water separation efficiency within a shorter detention time, thus the water content in the white oil is less than 50 ppm, and the white oil with economic value is reclaimed. The method and the device not only reach the discharge standard, but also obtain certain economic benefit; besides, the technique does not require the addition of chemical substances such as an emulsion splitter, and the like, and cannot generate secondary pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of oily sewage treatment, in particular to a process method and device for treating white oily sewage. Background technique [0002] Sewage degreasing is used in chemical industry, environmental protection, food, railway locomotive depot, non-ferrous metal processing and other departments. It is widely designed to treat oily sewage in various departments to protect the environment. In recent years, due to the large-scale development of petroleum and chemical enterprises, the discharge of various oily sewage is increasing. Whether it is energy utilization or environmental protection, sewage degreasing technology has attracted more and more attention. [0003] White oil, usually refers to white mineral oil. A common industrial white oil, used as a synthetic fiber surface treatment agent and lubricant to improve the binding and smoothness of synthetic fibers. The white oil used in the production process of te...

AI Technical Summary

Problems solved by technology

Because air microbubbles are composed of non-polar molecules, they can combine with hydrophobic oil and rise together with oil droplets, and the floating speed can be increased by nearly a thousand times, so the oil-water separation efficiency is very high, but the power consumption is large, and the structure Complicated and difficult to maintain

In addition, there are biological methods, electrocoagulation methods, membrane separation methods, magnetic separation methods, hydrocyclones, etc. for the treatment of oily sewage, but there is no literature report on the treatment process of white oily sewage.

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