Method for changing relative dielectric constant of fiber capture medium

Abstract

The invention discloses a method for changing a relative dielectric constant of a fiber capture medium. According to the method, nano-scale titanium dioxide and barium titanate are utilized to modify the fiber capture medium which is laid to be strip-shaped in disorder. The specific method comprises the following steps of: adding the titanium dioxide into water glass according to a proportion of 8 percent by weight, uniformly stirring and then spraying on one face of the fiber capture medium to form a titanium dioxide sprayed coating; adding the barium titanate into the water glass according to the proportion of 2 percent by weight, uniformly stirring and then spraying on the other face of the fiber capture medium to form a barium titanate sprayed coating; and drying through hot blowing and then applying. The particle diameters of the nano-scale titanium dioxide and barium titanate are both 0.5-0.72 microns. The relative dielectric constant of the modified fiber capture medium is increased by 10-12 times, the surface also becomes rough, the adsorptive neutralization effect and efficiency of the fiber capture medium in an electric adsorptive purification process can be greatly improved, and an interception effect of the surface of the fiber on impurities is increased.

Description

technical field [0001] The invention relates to a method for changing the relative dielectric constant of a fiber collection medium, belonging to the technical field of oil purification. Background technique [0002] The existing electro-adsorption oil purification method uses a DC electric field to generate bound charges on the surface of the fiber capture medium filled between the two polar plates in the electric field, and the impurities contained in the oil are forcibly dissociated under the action of an external DC electric field. It is converted into ions with positive and negative potentials and is displaced under the action of the electric field force, so that they are absorbed and neutralized by the bound charges of the trapping medium, so as to achieve the purpose of oil purification. However, due to the relatively small relative permittivity of the polymer fibers and mineral fibers used (about 2-2.5), the amount of surface bound charges induced by the electric fie...

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Problems solved by technology

However, due to the relatively small relative permittivity of the polymer fibers and mineral fibers used (about 2-2.5), the amount of surface bound charges induced by the electric field is relatively small, which seriously affects the purification effect of electrosorption. Moreover, the surface of the fiber is smooth, and some impurities will be taken away under the action of the oil flow, which will affect the purification effect and efficiency.

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