Device for demulsifying oil-in-water emulsion under action of direct current electric field

Abstract

The invention discloses a device for demulsifying an oil-in-water emulsion under the action of a direct current electric field. The device comprises a box body, cathode plates and anode plates, and the cathode plates and the anode plates are alternately arranged in parallel to for a continuous S-shaped channel. The S-shaped channel formed among the above pole plates accelerates the flow of the emulsion, so the moving speed of oil droplets in the emulsion is improved, and the probability of collision and coalescence of the oil droplets is increased; the surfaces of the oil droplets are charged,so the introduction of a direct-current electric field significantly accelerates the movement of the oil droplets to provide kinetic energy for the oil droplets, thereby the oil droplets can easily overcome the repulsion and the interface film to coalesce; and the flowing Reynolds number Re of the fluid increases after the emulsion passes through the cathode plates and the anode plates, and the direct-current electric field is applied among the pole plates to increase the probability of collision and coalescence of the oil droplets under the coupling of the electric field and the flow field in order to make the oil droplets easily coalesce, so the coalescence rate of the oil droplets is increased, and the oil phase and the water phase are quickly separated.

Description

technical field [0001] The invention belongs to the field of chemical separation equipment and relates to the technical direction of oil-water separation, in particular to a demulsification device for oil-in-water emulsion under the action of a direct current electric field. Background technique [0002] Petroleum exploration and refining, coal chemical industry, mechanical processing, cosmetics production and food processing industries will produce a large amount of oily wastewater in the form of oil-in-water emulsion in the production process. The physical and chemical properties of oil-in-water emulsions are more complex, so it is more difficult to handle. Every year, industry and human life produce and discharge a large amount of sewage into the environment. If it is not treated, the sewage will not only pollute the rivers, lakes and seas on the surface, but more importantly, it will enter the groundwater through underground seepage, seriously polluting Groundwater and ...

AI Technical Summary

Problems solved by technology

These equipments occupy a large area, need to invest a lot of manpower, material resources and funds, have low efficiency, high energy consumption, poor adaptability, serious secondary pollution, consume a lot of chemicals, and the cost is too high

At the same time, membrane separation equipment and adsorption equipment are likely to cause pollution and clogging of membranes and adsorbents, the treatment process is complicated, and the process takes a long time

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