Ultrasonic separation device for fine particles

Abstract

The invention relates to an ultrasonic separation device for fine particles. The ultrasonic separation device is characterized in that a water inlet is formed in the top of a dynamic separation chamber, and a particle outlet and a water outlet are sequentially formed in the bottom of one end, opposite to the water inlet, of the dynamic separation chamber; a reflection plate is horizontally arranged at the front end of the particle outlet; a first ultrasonic transducer is arranged at the position, directly facing the reflection plate, on the top of the dynamic separation chamber; a second ultrasonic transducer is arranged at the water outlet of the dynamic separation chamber; an acoustic panel is arranged at the position, directly facing the second ultrasonic transducer, at the water inlet of the dynamic separation chamber. According to the ultrasonic separation device, by virtue of a low-frequency standing wave and high-frequency traveling wave combination method, the processing time is greatly shortened, the equipment cost is greatly lowered, the whole structure is compact, the fine particles, even a very limited number of fine particles in a flow field can be separated, furthermore, the separation time is short, and the separation effect is good.

Description

technical field [0001] The invention belongs to the technical field of physical separation equipment research, and in particular relates to an ultrasonic separation device for separating fine particles suspended in a fluid by means of ultrasonic waves. Background technique [0002] For the fine particle pollutants produced in various production processes, the traditional method is to use ceramic filter adsorption, fine bubble adsorption, and natural precipitation using the density difference between the fluid and fine inclusions to remove them. There are also methods such as electric field ] Or the technology of magnetic field to remove tiny inclusions in the fluid. But when the particle size of the particles is less than 60μm, the effect of these technologies is not ideal. With the development of ultrasonic technology, ultrasonic waves are used to remove particles, air bubbles or The new method of liquid droplets has been paid more and more attention by people. However, the...

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Problems solved by technology

[0002] For the fine particle pollutants produced in various production processes, the traditional method is to use ceramic filter adsorption, fine bubble adsorption, and natural precipitation using the density difference between the fluid and fine inclusions to remove them. There are also methods such as electric field ] Or the technology of magnetic field to remove tiny inclusions in the fluid. But when the particle size of the particles is less than 60μm, the effect of these technologies is not ideal. With the development of ultrasonic technology, ultrasonic waves are used to remove particles, air bubbles or The new method of liquid droplets has been paid more and more attention by people. However, the current researchers basically use the method of standing wave or traveling wave to separate the tiny particles in the fluid. The traditional ultrasonic separation of fine particles uses the particles in the antinode or Acoustic pressure nodes gather to form larger particles and finally settle down under the action of gravity, and the condition must be that the number of fine particles in the fluid is large, so that the fine particles have the opportunity to collide and gather to form large agglomerates of particles to settle down

However, when the number of fine particles in the fluid is small, the chance of collision will be reduced, and the number of large agglomerates formed by aggregation will be very small, so that there are still fine particles suspended in the fluid, and even fine particles can finally aggregate. However, the separation time is also very long, and the entire processing device is huge. Therefore, theory and experiments have proved that it is difficult to separate particles in a short period of time by simple standing waves or traveling waves, and the equipment is relatively large. , resulting in high costs, high maintenance costs, and high energy consumption

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