Distillation one distillation process. In the same equipment, the use of different substances boiling, evaporation and condensation alternately repeated purification by distillation to separate substances. Replaced by rectification times by simple distillation, the liquid mixture can be separated into almost pure components.
Distillation is usually carried out in a distillation column, gas-liquid two-phase countercurrent contact through, inter phases heat and mass transfer. The volatile components in the liquid phase into the gas phase, the gas phase into the liquid phase of the less volatile component, thus obtained in the overhead volatile components almost pure, nearly pure bottoms obtained the less volatile component. From the mid-column feed liquid is added, the tower section above the feed opening, the rising vapor further enriched volatile components, called the rectifying section; column inlet section below, extracted from the descending liquid in volatile group points, called the stripping section. From the overhead vapor condensed, part of the condensate is returned as reflux distillation column from the top, the rest is overhead distillate product. Bottoms liquid withdrawn partially vaporized by the reboiler, steam rises along the tower, the rest of the liquid as a bottoms product. Overhead amount of liquid back into the tower and the tower called reflux ratio of the amount of product than, its size will affect the separation efficiency and energy distillation operations.
Depending on the operating mode, continuous distillation and rectification can be divided into batch distillation; according to the mixture fraction, it can be divided into binary distillation and rectification pluralism; based on participation in the gas-liquid equilibrium of the mixture impact additive, separable ordinary distillation and special rectification (including extractive distillation, azeotropic distillation and rectification salt). If accompanied by a chemical reaction, it is called reactive distillation. In non-ferrous metallurgy, distillation refining crude zinc used successfully (see crude zinc distillation). The industry also often into the metal chlorides then be isolated and purified by distillation.
Chong Hing Chemical Equipment Co., Ltd. focus on gravity distillation equipment, gravity distillation machine production, the company's main products: efficient rotary distillation machine, sampler distillation, desulfurization equipment, sewage treatment equipment (saline waste water treatment) all kinds of stainless steel reactor, heat exchangers, condensers, solvent efficient separation device, retorts, continuous centrifuge.
Zhejiang Chemical Equipment Co., Ltd. Chong Hing
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