Ultrasonic vibrating rod uses the alternating period of positive and negative pressure existing in the transmission process of ultrasonic waves. In the positive phase, the medium molecules are squeezed to increase the original density of the medium; in the negative phase, the medium molecules are sparse and discrete, and the medium density Decrease. Ultrasonic vibrating rods can uniformly generate ultrasonic waves around 360°, and the energy output is not affected by load changes such as liquid level and temperature difference. Ultrasonic vibrating rods generally include high-power ultrasonic transducers, horns, and tool heads (transmitting heads). ), used to generate ultrasonic vibration and emit this vibration energy into the liquid. The transducer converts the input electrical energy into mechanical energy, that is, ultrasound. Its manifestation is that the transducer stretches back and forth in the longitudinal direction, and the amplitude is generally a few microns. This amplitude power density is not enough and cannot be used directly. The horn amplifies the amplitude according to the design requirements, isolates the reaction solution and the transducer, and also plays a role in fixing the entire ultrasonic vibration system. The tool head is connected with the horn, the horn transmits the ultrasonic energy vibration to the tool head, and then the ultrasonic energy is emitted into the chemical reaction liquid by the tool head.
The ultrasonic vibrating rod is mainly composed of an ultrasonic transducer, an ultrasonic horn, an ultrasonic tool head and an ultrasonic drive power supply. Compared with the traditional ultrasonic vibration plate, it has the characteristics of wider application range and longer service life. In industrial applications, the use of ultrasonic vibrating rods for dispersion, extraction, cleaning, chemical reactions, water treatment, etc., is a very mature and widely used technology.
Chinese medicine extraction: refers to the ultrasonic pulverization (breaking) of Chinese medicine cells to achieve high-efficiency extraction of useful substances. Compared with conventional extraction technology, ultrasonic assisted extraction is fast, inexpensive, efficient, safe, low in cost, and widely applicable.
Biodiesel production: The use of ultrasonic emulsification to prepare a biomass oil-diesel mixed emulsion is actually to disperse the biological oil droplets into another immiscible diesel liquid. Compared with other technologies, the prepared droplets can be finely dispersed and narrowly distributed, high efficiency, good dispersion effect, and can increase the stability of the emulsion.
Ultrasonic sea life prevention: It is based on the cavitation effect of ultrasound. When the tiny bubble core in the liquid is activated under the action of ultrasound, it manifests as a series of dynamic processes such as the oscillation, growth, contraction and collapse of the bubble. The bubbles in the liquid generate hundreds of atmospheres and high temperatures of thousands of degrees Celsius at the moment of bursting, which can quickly peel off the attachment of sea creatures and smash the epidermal cells of sea creatures, so as to achieve the purpose of preventing sea creatures.
Ultrasonic catalysis: The application of ultrasound to the catalytic reaction process can simulate the high-temperature and high-pressure reaction in the reactor on a microscopic scale. It provides a very special physical and chemical environment for catalytic reactions that are difficult or impossible to achieve under normal conditions. The catalytic reaction can be carried out in a relatively mild environment. It can further increase the reaction speed, shorten the reaction time, and increase the yield of the target product. The main applications are catalysis on metal surfaces, phase transfer catalyzed reactions, and enzyme catalyzed reactions.
Sewage treatment: In the process of sewage treatment, ultrasonic cavitation has a strong ability to degrade organic matter, and the degradation rate is very fast, which provides the possibility to degrade harmful organic matter in the water, so as to achieve the purpose of ultrasonic sewage treatment.
Ultrasonic dispersion: refers to the process of dispersing and de-aggregating particles in the liquid through the "cavitation" effect of ultrasonic waves in the liquid using liquid as a medium. Ultrasonic dispersion can be divided into emulsion dispersion (liquid-liquid dispersion) and suspension dispersion (solid-liquid dispersion), and has been applied in many fields. The application of ultrasonic for the dispersion of suspensions includes the dispersion of titanium oxide in water or solvents in the coating industry, the dispersion of dyes in molten paraffin wax; the dispersion of drug particles in the pharmaceutical industry, and the powder emulsion in the food industry Dispersion and so on.
