Method and device for ultrasonically treating dirty oil through sulfur-containing sewage

Abstract

The invention belongs to the technical field of dirty oil treatment, and particularly relates to a method and device for ultrasonically treating dirty oil through sulfur-containing sewage. The sulfur-containing sewage is injected into the dirty oil for mixed demulsification, then demulsification is ultrasonically strengthened, finally, the oil-water-slag three-phase separation is achieved throughthe sedimentation of a sedimentation tank, and the treated dirty oil has the moisture content smaller than 5% and the mechanical impurity content smaller than 1%. By means of the method, the dirty oilis demulsified by the sulfur-containing sewage, the demulsification effect is ultrasonically strengthened, the use of chemical reagents is avoided, the cost is reduced, the ideal oil-water-slag three-phase separation effect is achieved, the moisture content of the dirty oil is smaller than 5%, and the mechanical impurity content is smaller than 1%. The device for ultrasonically treating the dirtyoil through the sulfur-containing sewage can be manufactured into a skid-mounted device for vehicle-mounted movement and can also be mounted and used on an industrial site. The method and device forultrasonically treating the dirty oil through the sulfur-containing sewage are suitable for demulsification of high-moisture-content oil-water emulsions and especially suitable for dirty oil treatmentin oil fields or oil refineries.

Description

technical field [0001] The invention belongs to the technical field of waste oil treatment, and in particular relates to a method and a device for treating waste oil with ultrasonic sulfur-containing sewage. Background technique [0002] Slop oil is a type of high water content emulsified crude oil produced in the production process of oil fields or refineries. Some dirty oil is called heavy dirty oil. Heavy dirty oil has high content of mechanical impurities, high metal content, high content of solid suspended particles, high water content, high content of surfactant, etc. Heavy dirty oil mainly comes from crude oil tanks Sludge oil from processes such as undercut water, crude oil electric desalination water cut, equipment maintenance and line sweeping, sewage treatment grease trap recovery, etc.; Effective processing and utilization, after a long period of hydrothermal biochemical action, the treatment becomes more and more difficult, so it is called aging oil; the source...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of the existing ultrasonic technology, such as the addition of chemical agents, complex process, high treatment cost, high water content of the treated sewage oil, and difficulty in the treatment of extracted water, etc., to provide an ultrasonic treatment of sulfur-containing sewage. The method of dirty oil, on the one hand, avoids the corrosion of production equipment caused by the use of strong acid and strong alkali in the prior art, reduces the cost of dirty oil treatment increased by adding chemical demulsifiers and flocculants, and reduces the difficulty of processing the sewage. ; On the other hand, it simplifies the complex process of repeatedly treating dirty oil in the process of ultra-high-power ultrasonic treatment of dirty oil, and the treated dirty oil meets the index requirements of water content <5% in the mixing process of dirty oil

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