20khz Ultrasonic flow cell Electric Slurry defoaming machine with chiller

20khz Ultrasonic flow cell Electric Slurry defoaming machine with chiller

What is the ultrasonic Defoaming?

Ultrasonic degassing and defoaming is an effective method for removing dissolved gases and or entrained bubbles from a variety of liquids. Including water, candle wax, aluminum alloy melts, epoxy resins, silicone oils, adhesives, coating solutions, beverages, polymers, inks, paints, transformer oils, emulsions and suspension products, motor oils, etc. Unlike vacuum degassing, which is a batch process, ultrasonic degassing can be performed in a continuous flow mode.

When ultrasonic working, the sound waves propagating from the radiating surface into the liquid medium cause alternating high-pressure and low-pressure cycles, the rate of which depends on the frequency. During the low-pressure cycle, the ultrasonic waves create small vacuum bubbles or voids in the liquid. A large number of small bubbles creates a high total bubble surface area. The bubbles are also well distributed in the liquid. Dissolved gases migrate into these vacuum bubbles through the larger surface area and increase the size of the bubbles. The sound waves support the contact and coalescence of adjacent bubbles, resulting in accelerated bubble growth. Ultrasonic waves also help to shake the bubbles on the surface of the container and force smaller bubbles located below the liquid surface to rise and release trapped gases into the environment

Battery slurry is a highly viscous solid-liquid two-phase suspension system formed by electrode active materials, binders, and conductive agents uniformly dispersed in a solvent. One of the basic requirements for battery slurry is dispersion uniformity. If the conductive agent is not evenly dispersed, different electrochemical reactions will occur in the electrode during charging due to different conductivity in different places, which will not only generate a more complex SEI film, reduce the reversible capacity and be accompanied by local overcharge and over-discharge, but also form lithium dendrites, posing a safety hazard. If the binder is unevenly distributed, there will be areas where the bonding force between particles and between particles and current collectors is too small, the internal resistance of the electrode will increase and even fall off, which will ultimately affect the performance of the entire battery capacity. Therefore, it is very important to achieve good dispersion uniformity of each component in the slurry.

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Ultrasonic defoaming technology uses ultrasonic waves generated by high-frequency vibration to break or aggregate bubbles in the foam, thereby achieving the effect of eliminating foam. The principle is that the vibration of ultrasound can cause the gas in the liquid to be subjected to pressure changes, thereby generating tiny bubbles, which are aggregated or broken with the vibration of ultrasound. In this way, the originally dispersed bubbles can be gathered into large bubbles, which then float to the surface of the liquid and quickly break and disappear.

Ultrasonic defoaming technology has many unique advantages. First, it can eliminate foam without using chemical defoaming agents. Therefore, it can not only reduce costs, but also avoid environmental pollution or risks to human health. Secondly, ultrasonic defoaming technology is very efficient in dealing with foam problems and can eliminate foam quickly and thoroughly. In addition, the ultrasonic wavelength is adjustable and suitable for bubbles of different particle sizes, which provides convenience for dealing with different foam systems. In practical applications, ultrasonic defoaming technology has been successfully applied to many fields such as the food industry, pharmaceutical industry, and chemical industry, and has achieved good results.

In summary, ultrasonic defoaming technology, as an efficient and pollution-free foam treatment technology, plays an irreplaceable role in various industries. First of all, it is time-saving and labor-saving, and can quickly and thoroughly eliminate foam. Secondly, ultrasonic defoaming technology does not require the use of chemical defoaming agents, avoiding environmental pollution and human health risks. Therefore, it has been widely used in the food industry, pharmaceutical industry, chemical industry and other fields. With the continuous development of science and technology, ultrasonic defoaming technology will have broader application prospects in the future. I believe that in the near future, ultrasonic defoaming technology will become a method for various industries to deal with foam problems.