Products Description

What is the working principle of thin film distillation system and how does it achieve efficient material separation?

The working principle of thin film distillation system is mainly based on a new thermally driven separation technology, whereby a pressure gradient is created on both sides of the membrane, causing the vapour molecules to migrate through the membrane pores to the outside of the membrane and condense down.

This process involves the principle of heat and mass transfer, as well as the characteristics of several major membrane distillation units such as direct contact, air gap, air sweep and vacuum. Membrane distillation technology is commonly used to separate different components from a liquid mixture, the basic principle of which is to exploit the vapourisation and condensation properties of different chemicals at different temperatures.

In addition, the thin film distillation system selection instructions pointed out that the technology uses the difference in volatility of the components in the liquid mixture for mass transfer process, that is, the vapour produced by the boiling of the liquid into the condenser tube, so that it is cooled and condensed into a liquid evaporation, condensation process.

The ways in which thin film distillation system achieves efficient separation of substances include, but are not limited to, the following: First, separation is carried out by means of tiny holes in the thin film module, which allow molecules of specific sizes to pass through, thus achieving effective separation of the different components. Second, the thin-film evaporator operates under vacuum and spreads out the material by means of a scraper to accelerate the evaporation of the lighter components in the material, and this design helps to improve the separation efficiency. In addition, the design of the thin film distillation equipment takes into account the law of bottom-up flow of vapour from the light components and the need for condensation on the built-in condenser, which helps to ensure that the light components can be sufficiently condensed, thus improving the separation effect. Finally, the design features of the scraper type thin film evaporator, such as high vacuum (short range) distillation, short residence time and high agitation of the feed, also make it suitable for processing a wide range of thermally sensitive, high boiling point, fouled and viscous materials, which further enhances separation efficiency.

Thin film distillation system achieve efficient material separation through their unique design and operating principle, which is largely attributed to their ability to effectively utilise the differences in volatility of the different components, accelerate the evaporation and condensation process of the lighter components under specific conditions, and adaptability to a wide range of materials to be processed.