The deodorization tank is a vital piece of equipment in edible oil refining, designed to remove undesirable odors, free fatty acids (FFA), and volatile impurities from vegetable oils. As the final step in the refining process, deodorization determines the flavor, stability, and overall quality of the finished oil. A well-designed deodorization tank ensures that oils such as soybean oil, sunflower oil, palm oil, cottonseed oil, and corn oil achieve neutral taste, clear color, and extended shelf life.

Why Use a Deodorization Tank?

Vegetable oils often contain volatile compounds, aldehydes, ketones, and residual free fatty acids that can cause off-flavors and reduce stability. Without deodorization, even bleached and neutralized oils may remain unsuitable for consumption. The deodorization tank provides:

1. Removal of unwanted odor and taste compounds to produce a neutral, high-quality edible oil.
2. Reduction of free fatty acids (FFA) to improve stability and storage life.
3. Improved sensory qualities making the oil suitable for cooking, frying, and food processing.
4. Compliance with international food standards, ensuring oils meet market requirements.

Design Features and Advantages

Voson’s deodorization tanks are built with advanced design to deliver reliable and efficient performance in both small-scale and large industrial oil refineries.

• Steam stripping technology: Direct steam is introduced under vacuum conditions to strip volatile substances and free fatty acids.
• Vacuum system integration: Maintains low pressure for effective removal of odor compounds and oxidation prevention.
• Uniform heating system: Equipped with thermal oil or steam heating coils to maintain precise high temperatures (typically 180–260°C).
• Energy efficiency: Optimized design reduces steam and energy consumption while maximizing throughput.
• Durable construction: Made from stainless steel to withstand high temperature and corrosive conditions during long-term operation.

Application in Oil Refining Process

The deodorization tank is the final refining stage after degumming, neutralization, and bleaching. It is widely used in edible oil refining plants for:

• Soybean oil: Removes beany odor and improves flavor.
• Sunflower oil: Eliminates residual odor and ensures clarity.
• Palm oil: Deacidifies and improves oxidative stability.
• Cottonseed oil: Strips off volatile compounds and ensures neutral taste.
• Corn oil: Improves shelf life and makes oil suitable for food applications.

By integrating a deodorization tank, edible oil producers can ensure their products meet consumer expectations and international market standards.

Voson deodorization tanks are available in capacities ranging from 20 tons/day for small refineries to more than 500 tons/day for large-scale edible oil plants. The design can be customized based on production needs, energy systems, and integration with other refining equipment.