Physical demulsifying and coalescing and oil-water separating method for oil-water emulsion under micro-electric field effect

Abstract

The invention discloses a physical demulsifying and coalescing and oil-water separating method for an oil-water emulsion under micro-electric field effect, and relates to the technical fields such as petroleum, petrochemical, food, machining and shipping industries. The technical scheme adopted is as follows: oil drops of oily sewage float upward and are coalesced and absorbed on the lower surface of a coalescing plate under the effect of the micro-electric field between the lower surface of the oil-water coalescing plate and a bottom plate of a box body. The oil drops coalesced and expanding in volume float upward from an oil spill hole, so that the oil and water are effectively separated. According to the invention, micro emulsus drops are transferred, absorbed and coalesced, and float upward under the effect of the micro-electric field through a pure physical method, and finally oil and water are separated. The oil-water separation rate can reach over 98%.

Description

technical field [0001] Purification of clean water for heavy equipment, purification of cooling water for machine tools, purification of oily sewage in manufacturing, purification of oily sewage in oil depots, treatment of oily sewage in engine rooms of large ships, treatment of oily sewage in oilfields, treatment of oily sewage in oil refineries, etc. [0002] The invention belongs to a physical demulsification and coalescence method and device for emulsified oil in oily sewage. Background technique [0003] Industrial production, aerospace, domestic wastewater and national defense facilities all have the demand for purification treatment of oily water and water-containing oil. Purification of oily water and water-containing oil has always been relevant. An important link in the production process is an important means to improve product quality and economic benefits, and is also a requirement for environmental protection emissions. [0004] Oil in oily water can be divide...

AI Technical Summary

Problems solved by technology

The process of the chemical method is dosing-flocculation-filtration, and its characteristics are: a wide range of chemical reagents, convenient dosing, and simple operation; the disadvantage is that it is easy to cause secondary pollution, and the oil after flocculation separation is not easy to recover and the cost is high

The characteristics of the microbial method are: the use of bacteria to swallow oil in water, which is characterized by green environmental protection; its disadvantages are: the colony population is easy to degrade and mutate, and has high environmental requirements

The characteristics of the sedimentation method are: the process is simple and easy to operate, its disadvantage is that it needs a larger container and a longer time, and the effect is not good

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