The working principle of distillation equipment is mainly based on the difference in volatility of each component in the liquid mixture. The liquid is partially vaporized by heating, and then the vapor is converted into liquid by condensation, so as to achieve the purpose of separation and purification. The following is a detailed analysis of the working principle of distillation equipment:
1. Basic Principle
The core principle of distillation is to use the difference in boiling points of different components in the liquid mixture. When the liquid is heated, the component with a lower boiling point is first vaporized to form vapor, while the component with a higher boiling point remains in the liquid. The vapor is then cooled by the condenser and converted back into liquid, thus achieving Separation .
2. Heating and förångning
During the distillation process, the liquid mixture is heated to boiling. As the temperature rises, the movement of liquid molecules intensifies, and some molecules escape from the surface of the liquid to form vapor. The vapor pressure increases with the increase in temperature. When the vapor pressure reaches equilibrium with the external pressure, the liquid begins to koka .
3. Condensation and Separation
The vapor is cooled by the condenser and converted back into liquid. The condensed liquid (distillate) usually contains a higher concentration of low-boiling components, while the liquid left in the distillation flask contains a higher concentration of high-boiling components. In this way, the distillation equipment can achieve the separation and purification of liquid mixtures.
4. Förhindrar våldsam kokning
During the distillation process, in order to prevent the liquid from overheating and violent boiling, a violent boiling agent (such as zeolite) is usually added to the distillation flask. The violent boiling agent can provide a vaporization center to make the liquid boil smoothly and avoid the sudden release of a large amount of vapor causing the liquid to spray out.
5. applikation och klassificering
Destillationsutrustning används i stor utsträckning inom oljeraffinering, kemisk, farmaceutisk och andra industrier för att separera och rena flytande föreningar . Enligt separationskraven kan destillationsutrustning delas upp i enkel destillation, jämviktsdestillation och fraktionering . Fraktionering är mer lämplig för att separera vätskepunkter med liknande boiliseringspunkter och fraktionering av multipel. processer .
6. hög vakuumdestillation
In some special applications, such as separating high-boiling and heat-sensitive substances, distillation equipment will operate under high vacuum conditions. High vacuum distillation has the characteristics of low distillation temperature, short material heating time, and high separation degree, and is suitable for industries such as medicine and food.
Summary: Destillationsutrustning använder skillnaderna i kokpunkten för varje komponent i den flytande blandningen genom uppvärmning, förångning, kondensation och andra steg för att uppnå separering och rening . Dess arbetsprincip är enkel och effektiv, och den används allmänt inom många industrifält .}
