A photoacoustic coupling device for migrating suspended particles

Abstract

The invention discloses a device for migrating suspended particulate matters through photo-acoustic coupling. The device comprises a closed space, parallel light beams, a mixed medium and Helmholtz resonator sound sources, wherein the closed space is of a cuboidal cavity structure and comprises four vertical faces, a top face and a bottom face; the Helmholtz resonator sound sources are symmetrically arranged at the four vertical faces of the closed space so as to form a quadrupolar sound source, and a heterogeneous two-dimensional sound standing wave field is formed in the closed space under the action of the quadrupolar sound source; the mixed medium consists of a gas medium and suspended particles which are uniformly dispersed in the gas medium and is filled in the closed space; and the parallel light beams pass through the closed space, and the mixed medium in the closed space is divided into a first area, where no light beam passes through, a second area, where light beams pass through, and a third area, where no light beam passes through. The device is simple in structure and convenient in operation, and the separation of the suspended particles from the gas medium can be achieved.

Description

technical field [0001] The invention relates to a device for separating mixed fluid composed of suspended particles and gaseous medium by photoacoustic coupling and migrating suspended particles. Background technique [0002] When a strong light beam is irradiating a large number of suspended particles uniformly suspended in the gas, due to the blocking effect of the suspended particles on the light, the distance that the light beam can penetrate the suspended particle gas is reduced, such as the Tyndall phenomenon. For example, the light intensity outside the hazy day is much lower than that of the sunny day, and the light absorption effect of a large number of suspended particles in the air hinders the transmission of light radiation; further, the energy of the sun's rays is absorbed by the suspended particles, and becomes suspended particles in the air. A source of kinetic energy for irregular motion in air. Generally speaking, when the sunlight on a sunny day in summer ...

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Problems solved by technology

[0003] At present, in the technical research on the separation of suspended particles and gases in mixed fluid media at home and abroad, there is no such thing as adjusting the balance between the regular motion energy and irregular motion energy of suspended particles to achieve the requirement of regularly moving suspended particles. When moving through the "barrier" composed of a large number of irregularly moving suspended particles, based on the contact or collision of these two parts of the suspended particles, the directionality of the regular movement of the suspended particles is finally weakened, so that the regularly moving suspended particles move to When in the "barrier" area, the ability to penetrate the "barrier" is reduced and remain in the "barrier" area, thereby producing an aggregation effect in the "barrier" area

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