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Introduction to PTFE lined Distillation Tower
Lined PTFE distillation towerThe working principle of the fermentation process in mature mash is that it not only contains alcohol, but also dozens of other substances. If water is added, the content of these substances far exceeds that of alcohol. The alcohol content in mature mash is only about 7-11% (by volume), and impurities including water, alcohols, aldehydes, acids, and lipids account for almost 90%. To obtain pure alcohol, a certain method must be used to separate the alcohol from the mature mash. In production, the method of heating distillation is used to separate various substances with different boiling points, densities, and volatiles from different equipment, thereby obtaining higher purity alcohol.
The working principle of the crude distillation tower is that the fermented mature mash is preheated and enters the upper part of the crude distillation tower. Heating steam is continuously and uniformly introduced into the bottom of the tower. At this time, the liquid alcohol in the mature mash can be converted into alcohol gas due to the heating effect. At the same time, other low boiling and volatile impurities become gaseous and enter the formaldehyde removal tower together with the alcohol (or directly enter the distillation tower). The bottom of the tower discharges the distilled waste mash outside the tower.When the crude distillation tower is running normally, the top temperature of the tower should not be lower than 93 ℃, but it should not be too high. Excessive top temperature is not conducive to separation and consumes a large amount of steam. Generally controlled at 95-96 ℃. The temperature is too low, and the awakened alcohol has not completely evaporated, resulting in a significant increase in alcohol escape rate. The boiling point of pure alcohol is 78.3 ℃, but the boiling point of mixed liquids containing water and other components is much higher than 78.3 ℃. Therefore, the bottom temperature of the crude distillation tower should not be lower than 105 ℃, generally between 105 ℃ and 109 ℃. Before entering the crude distillation tower, mature mash must be preheated to reduce temperature differences, which is beneficial for the stable operation of the crude distillation tower. Generally, the preheating temperature of the mash should be controlled between 60-70 ℃, but some production units may lower it by 5-10 ℃ due to equipment performance.
The working principle of the formaldehyde removal tower is that the alcohol in the mature mash is roughly distilled and enters the tower from the top of the crude distillation tower in a gaseous state. Through appropriate heating, condensation, and reflux in the formaldehyde removal tower, low boiling point and volatile impurities such as aldehydes and esters contained in the crude alcohol are discharged from the formaldehyde discharge pipe. The formaldehyde removed alcohol enters the liquid-phase distillation tower from the bottom of the aldehyde tower, and some of the liquor heads enter the fermentation tank or mature mash from the liquor head pipe.
Under normal circumstances, the bottom temperature of the formaldehyde removal tower is 86-89 ℃, and the top temperature is controlled at 79 ℃. The water temperature of the 1 * condenser on the formaldehyde removal tower should not be lower than 60 ℃, and the temperature of the last condenser should not be lower than 25 ℃.
The working principle of a distillation tower is that after the alcohol is distilled through the above two towers, the alcohol concentration needs to be further increased and impurities need to be further eliminated. The purpose of distillation in a distillation tower is to remove impurities from the top stage, extract impurities from the middle stage, and discharge impurities from the bottom stage through heating, evaporation, condensation, and reflux, to obtain a finished product that meets quality standards - alcohol.Lined PTFE distillation towerThe working principle is not limited to purifying alcohol.Lined PTFE distillation towerThe main function of is to separate mixed liquids, using the principle of different liquids under different conditions such as temperature and volatility (boiling point) for liquid separation, in order to achieve purification effect.Lined PTFE distillation towerIt is mainly divided into plate tower and membrane tower. Plate tower is quite common, and its structure can be divided into three parts: plate, reboiler, and condenser.
The top temperature of the distillation tower should generally be controlled at 79 ℃, the bottom temperature should be controlled at 105-107 ℃, and the temperature in the tower should be between 88-92 ℃ under normal wine extraction conditions. The water temperature of the 1 * condenser on the distillation tower should be between 60-65 ℃, the 2 * condenser should be between 35-40 ℃, and the temperature of the last condenser should preferably not be lower than 25 ℃.
The distillation tower produced by Jinti Yongtong is suitable for not exceedingThe distillation of various acids, bases, and organic compounds at 250 ℃ has good corrosion resistance, temperature resistance, and no adhesion or pollution, making it the preferred chemical anti-corrosion equipment for modern petrochemical enterprises.
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