Experimental ultrasonic cosmetic extraction tank

Experimental ultrasonic cosmetic extraction tankAdvantages:

(1) No need for high temperature.

(2) Atmospheric pressure extraction has good safety, simple and easy operation, and convenient maintenance.

(3) High extraction efficiency.

(4) Has broad-spectrum properties. Widely applicable, the vast majority of traditional Chinese medicine ingredients can be extracted by ultrasound.

(5) Ultrasonic extraction has little effect on the properties of the solvent and target extract.

(6) Reduce energy consumption.

(7) The processing capacity of medicinal materials is large, which can be doubled or multiplied several times, and there are few impurities. The effective ingredients are easy to separate and purify.

(8) The extraction process has low cost and significant comprehensive economic benefits.

Experimental ultrasonic cosmetic extraction tankPrinciple:Ultrasonic waves are elastic mechanical vibration waves that are fundamentally different from electromagnetic waves. Because electromagnetic waves propagate in vacuum, while ultrasonic waves must propagate in a medium, forming the entire process of expansion and compression when passing through the medium.

In liquid, the expansion process forms negative pressure. If the ultrasonic energy is strong enough, the expansion process will generate bubbles in the liquid or tear the liquid into small voids. These cavities instantly close, generating an instantaneous pressure of up to 3000 MPa during closure, known as cavitation, and the entire process is completed within 400 μ s.

Cavitation refines the substance and makes lotion, accelerates the target ingredients to enter the solvent, and improves the extraction rate. In addition to cavitation, many secondary effects of ultrasound also facilitate the transfer and extraction of target components.

The significance of the phenomenon of cavitation lies in the reaction that occurs when bubbles burst. At some points, bubbles no longer absorb ultrasonic energy and instead undergo implosion. Gas and steam in bubbles or cavities undergo rapid adiabatic compression, resulting in higher temperatures and pressures.

The volume of bubbles is extremely small compared to the total volume of the liquid, so the heat generated is instantly dissipated and does not have a significant impact on environmental conditions. The estimated cooling rate after the rupture of the bubble is about 1010 ℃/s.

In pure liquid, when a cavity ruptures, it always maintains a spherical shape due to the same surrounding conditions; However, near the solid boundary, the rupture of the cavity is non-uniform, generating a high-speed liquid jet that converts the potential energy of the expanding bubble into the kinetic energy of the liquid jet, moving within the bubble and penetrating the bubble wall.The above-mentioned effects of ultrasound are very effective in extracting various target components from different types of samples.