Alcohol Recovery Tower

Alcohol Recovery Tower | Dilute Ethanol Distillation, Concentration, and Recovery Equipment

💡The alcohol recovery tower utilizes a distillation process to concentrate dilute alcohol to 95%–99.5%. Constructed of 304/316 stainless steel, it features energy-saving waste heat preheating of the feed and is suitable for solvent recovery in the traditional Chinese medicine extraction and chemical industries.

I. Product Introduction

Alcohol recovery towers are used to concentrate low-concentration alcohol (dilute ethanol solutions) to 95%–99% or higher through distillation, enabling the recycling of solvents and reducing production costs and environmental impact. They are widely used in alcohol recovery processes across industries such as traditional Chinese medicine extraction, chemical synthesis, and food processing.

II. How It Works

The dilute alcohol solution is heated in a preheater before entering the middle section of the distillation column; the reboiler at the bottom of the column supplies rising steam, and the condenser at the top of the column condenses the steam into a liquid. Since the boiling point of alcohol (78.3°C) is lower than that of water, the alcohol is progressively concentrated within the tower. High-concentration alcohol is obtained at the top of the tower, while wastewater containing trace amounts of alcohol is discharged from the bottom of the tower. The reflux ratio at the top of the tower can be adjusted to control the alcohol concentration.

III. Main Structural Components

✅ Distillation column (packed tower or sieve plate tower)

The distillation unit is available in two tower configurations—packed or sieve-plate—to ensure thorough gas-liquid contact for alcohol purification.

✅ Reboiler (shell-and-tube heat exchanger)

Steam is used to heat the liquid in the reactor, continuously generating rising distillation vapor.

✅ Condenser (tube-and-shell or spiral plate)

The alcohol vapor is cooled and liquefied at the top of the tower, completing the gas-phase condensation.

✅ Preheater (utilizes heat from the top of the tower)

Recover residual heat from the condenser to preheat the feed solution, thereby reducing steam consumption.

✅ Finished Cooler

Secondary cooling of high-concentration finished alcohol facilitates storage and bottling.

✅ Online Alcohol Concentration Monitor

Monitor the discharge concentration in real time to precisely control product specifications.

✅ Recirculation tank, finished product receiving tank

Store the reflux liquid and the qualified finished alcohol separately.

✅ Vacuum system (for reduced-pressure distillation)

Vacuum conditions lower the boiling point, making it suitable for the recovery of alcohol from heat-sensitive materials.

✅ Control System (PLC + Touchscreen)

The entire system automatically controls feed rate, reflux, and temperature parameters.

IV. Core Advantages

✅ High recovery concentration: Up to 95%–96% in a single distillation; when combined with molecular sieves, this can be increased to 99.5%.

High-concentration ethanol can be obtained through conventional distillation, and anhydrous ethanol can be produced using a suitable molecular sieve.

✅ Energy-efficient design: Waste heat from the top of the tower is used to preheat the feedstock, reducing steam consumption.

Waste heat recovery results in a significant reduction in energy consumption compared to traditional distillation equipment.

✅ Continuous operation: Automatic control of feed rate, discharge rate, and recirculation ratio; unattended operation.

Fully automated, enabling continuous and stable production 24 hours a day.

✅ Explosion-proof safety: All motors and instruments are explosion-proof, and the tower is grounded.

Complies with safety standards for the production of flammable and explosive solvents.

✅ High-quality material: SUS304/316L, resistant to alcohol corrosion.

All equipment is made of polished stainless steel, which is corrosion-resistant and easy to clean.

V. Typical Use Cases

✅ Traditional Chinese Medicine Extraction: After alcohol precipitation, the alcohol is recovered and reused in the extraction process.

Solvent recycling and reuse in the accompanying alcohol extraction production line.

✅ Chemical Industry: Distillation and recovery of reaction solvents (ethanol).

Purification and reuse of waste ethanol from the fine chemicals synthesis section.

✅ Food: Purification of brewing alcohol.

Concentration and refinement of low-alcohol beverages in the brewing industry.

✅ Biofuels: Concentration of fermented ethanol.

Concentration of crude ethanol by distillation following fermentation.

VI. Optional Configurations

✅ Molecular Sieve Dehydration Unit (for the Production of Anhydrous Ethanol)

Deep dehydration to produce anhydrous alcohol with a purity of 99.51 TP3T or higher.

✅ Vacuum distillation system (lowers the boiling point; suitable for heat-sensitive materials)

Low-temperature distillation to prevent the material from deteriorating due to heat.

✅ Fully Automatic Reflux Ratio Controller

Precise, automated reflux control ensures a stable concentration in the final product.

✅ Remote Data Monitoring

Remote monitoring of operating parameters facilitates production management.

✅ Waste Heat Recovery from the Tower Top Condenser

Further recover heat to optimize the system's overall energy consumption.

VII. Key Technical Specifications

VIII. Service Commitment

We offer end-to-end services ranging from equipment selection, solution design, and manufacturing to on-site installation and commissioning, as well as operations and maintenance training. All equipment can be customized to meet your needs, with nationwide delivery available. In Chongqing, we provide on-site service with a 24-hour response time.

🔗 Recommended Compatible Devices

Reference Guide for Selecting Production Line Equipment:
✅ Extraction of raw materials from the front end:Extraction equipment
✅ Heat Exchanger Accessories:Support Systems
✅ Feed Concentration Equipment:Concentration equipment