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Zhejiang Senbo Machinery Technology Co., Ltd
Structure and Working Principle of Alcohol Recovery Tower
Date: 2025-06-30Read: 30
The alcohol recovery tower mainly consists of the following six components:
1. Tower kettle: located at the bottom of the tower, used to heat dilute alcohol solution and provide the heat source required for evaporation.
Tower body: filled with stainless steel corrugated packing or baffle rotor inside, achieving efficient distillation by increasing the gas-liquid contact area. Some new equipment adopts a super gravity rotor structure, significantly reducing the height of the tower body.
2. Condenser: Condenses the alcohol vapor precipitated from the top of the tower into liquid form.
3. Cooler: Further reduce the temperature of condensed alcohol to ensure stable liquid recovery.
4. Buffer tank: temporarily stores condensed alcohol to balance system pressure.
5. High level storage tank: stores finished alcohol for future use.
All components that come into contact with materials are made of stainless steel (SUS304/SUS316L) to ensure corrosion resistance.
The working principle of alcohol recovery tower:
Separation based on the boiling point difference between alcohol and other components (such as water or impurities):
1. Evaporation section: Dilute alcohol solution (concentration 30-50%) is heated in the tower kettle to slightly above the boiling point of alcohol (about 78.4 ℃), and alcohol preferentially vaporizes to form vapor rising.
2. Distillation section:
The vapor in the packing layer of the tower body comes into countercurrent contact with the descending condensate, repeatedly undergoing partial condensation and re evaporation.
The low boiling point alcohol vapor continues to accumulate, and the non-volatile components (such as water) gradually concentrate towards the bottom of the tower.
3. Condensation recovery: High concentration alcohol vapor (93-95%) reaches the top of the tower and enters the condenser for liquefaction. After being cooled by the cooler, it is stored in a storage tank.
4. Residual liquid treatment: The alcohol content in the residual liquid at the bottom of the tower is reduced to ≤ 3%, which meets the environmental discharge requirements.
Technical characteristics of alcohol recovery tower:
1. Efficiency improvement: The supergravity technology can achieve a separation effect equivalent to a traditional distillation tower of 15 meters with a 1.2-meter-high rotor.
2. Wide applicability: In addition to alcohol, it is also suitable for the recovery of solvents such as methanol and acetone.
3. Energy saving and environmental protection: By regulating the purity of finished products through reflux ratio, energy consumption and raw material costs can be reduced.
Note: During operation, it is necessary to control the liquid level of the tower kettle at 1/2-2/3 to ensure stable operation.
