Working Principle:

Molecular distillation equipment is a special liquid-liquid separation technology that differs from traditional distillation, which relies on the principle of separating based on boiling point differences. Instead, it achieves separation by taking advantage of the differences in the average free path of molecular motion between different substances.

As the liquid mixture flows along the heating plate and is heated, light and heavy molecules will escape from the liquid surface into the gas phase. Due to the different free paths of light and heavy molecules, the molecules of different substances will move different distances after escaping from the liquid surface. If a condenser plate is appropriately set, the light molecules will reach the condenser plate, be condensed, and排出, while the heavy molecules will not reach the condenser plate and will be discharged along with the mixture. This achieves the purpose of separating substances.

The pressure difference between the boiling surface and the condensing surface drives the flow of steam, as even a small pressure drop can cause steam to flow. Operating at 1 mbar requires a very short distance between the boiling and condensing surfaces. Distillers based on this principle are called short-path distillers. Short-path distillers (molecular distillation equipment) feature an integrated condenser opposite the heating surface, reducing the operating pressure to 0.001 mbar.

The molecular distillation unit is a thermal separation process operating at pressures ranging from 1 to 0.001 mbar. Its lower boiling point makes it highly suitable for heat-sensitive and high-boiling point materials. Its basic components include a cylindrical vessel with a heating jacket, a rotor, and an integrated condenser; a scraper and anti-splash device are mounted on the fixed frame of the rotor. The integrated condenser is located at the center of the evaporator, with the rotor rotating between the cylindrical vessel and the condenser.

The molecular distiller is composed of an externally heated vertical cylindrical body, a central condenser located within it, and a scraper that rotates between the distiller and condenser.

The distillation process involves: materials are added to the **top** of the evaporator, where they are continuously and evenly distributed over the heating surface by a liquid distributor on the rotor. A scraper then forms the material into a thin, turbulent liquid film, which is propelled downward in a spiral motion. During this process, light molecules that escape from the heating surface condense into liquid on the built-in condenser through a short route and with minimal collision. They then flow down the condenser tubes and are discharged through a discharge pipe located at the bottom of the evaporator. The residual liquid, which consists of heavier molecules, is collected in a circular channel below the heating zone and is then discharged through a side outlet pipe.

Process of Molecular Distillation:

Filtering.

Wastewater flows by gravity into the filter pond, where a distributor weir is installed. It guides the water into the drum from one end, then it flows radially towards the polygonal filter dish cavity along the outer surface of the drum through long holes.

2. Cleaning.

During the filtration process, as the solid suspended particles accumulate continuously, some sludge adheres to the inner side of the filter cloth, gradually forming a sludge layer. Concurrently, the main unit of the short-path molecular distillation system is activated, driving the rotation of the filter disc and cleaning the filter plates on the filter plate.

3. Draining impurities.

During the filter plate cleaning process, the slurry flows into the mud outlet in the drum and is automatically discharged.