Super-high power ultrasonic sump oil emulsion breaking dehydration method

Abstract

The invention discloses a super-high power ultrasonic sump oil emulsion breaking dehydration method.The method comprises the steps that water-containing sump oil in a sump oil stock tank (1) is preheated and pressurized through a water-containing sump oil pump (2) and fed into a sump oil heater (3) to be heated to 50-85 DEG C; the heated water-containing sump oil is fed into an ultrasonic actuator (5) for continuous ultrasonic initial emulsion breaking; the sump oil obtained after initial emulsion breaking is fed into a pulse type ultrasonic emulsion breaking tank (6) through a pipeline for secondary emulsion breaking; the water-containing sump oil obtained after secondary emulsion breaking flows into a settlement separation dehydration tank (7) to be heated to 40-80 DEG C for settlement and layering to obtain sump oil, sewage and solid flocculent impurities; the sump oil located at the upper portion of the settlement separation dehydration tank (7) automatically flows into a finished sump oil tank (8); sewage and impurities enter a settling pond from the bottom of the settlement separation dehydration tank (7) through a sewage disposal well.According to the two-time ultrasonic emulsion breaking, sump oil dehydration is achieved, the sump oil dehydration rate is larger than 90%, and the sewage oil content is smaller than 500 mg / L.

Description

technical field [0001] The invention relates to the technical field of water-containing sewage oil treatment, especially refers to the demulsification and dehydration recovery of all kinds of light sewage oil and heavy sewage oil produced by oil refining enterprises and the treatment of sewage produced by oil production enterprises, specifically a dehydrated sewage oil Dehydration rate > 90% and sewage oil content < 500mg / L ultra-high power ultrasonic demulsification and dehydration method for sewage oil. Background technique [0002] Refinery waste oil is mainly the high water content oil emulsion produced in the treatment process of each treatment unit, that is, "aging" waste oil, and the amount of waste oil produced is 1% to 1.5% of the refining output. This kind of dirty oil has the characteristics of high emulsification, high water content and high impurity content. It is very difficult to break the emulsion by using the traditional heating dehydration and adding ...

AI Technical Summary

Problems solved by technology

This kind of dirty oil has the characteristics of high emulsification, high water content and high impurity content. It is very difficult to break the emulsion by using the traditional heating dehydration and adding demulsifier dehydration method. The dehydration rate of high water content dirty oil is less than 20%. , the impurity removal rate is almost zero, and the treated dirty oil cannot meet the production requirements of blending and processing in atmospheric equipment or coking equipment as quenching oil.

The main disadvantages of this traditional method of heating and adding demulsifiers are: high energy consumption, large consumption of demulsifiers, poor dehydration effect, difficult processing and utilization of dirty oil after demulsification, and demulsifiers cannot be processed, resulting in secondary water pollution , more difficult to deal with environmental protection, greatly increased the cost of sewage

The domestic oilfield produced sewage treatment process adopts the conventional treatment process of water flooding produced water, the advanced treatment process of water flooding oily sewage, and the conventional treatment process of polymer produced water. With the popularization and application of tertiary oil recovery technology represented by polymer flooding, the properties of oilfield produced sewage have changed greatly, and the existing sewage treatment process is not suitable, and the treatment effect becomes poor, which affects the oilfield development effect

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