₦airaland Forum

When you’re planning to launch a sunflower oil processing plant, do you often get stuck with these worries? If you source pretreatment, extraction, and refining machines from different suppliers, will mismatched components cause production bottlenecks? Will inconsistent standards across processes compromise the oil’s quality and food safety? Or will fragmented technical support leave you stranded when the line hits issues after startup?

Henan Glory provides you with an complete turnkey sunflower oil processing plant to address your concerns.

1. Seeds Preparation and Pretreatment

This initial stage is crucial for ensuring high oil yield and quality, and it also helps protect downstream machines.

Cleaning: Raw sunflower seeds contain impurities such as stems, leaves, sand, stones, and metal fragments. Cleaning machines (including vibrating screen, magnetic separator, and destoner) remove these impurities to prevent equipment damage and ensure the purity of sunflower oil.

Dehulling (Cracking and Separation): Sunflower seed shells are high in fiber and wax but low in oil content. Dehulling is necessary to remove them. Seeds are first cracked using cracker. Kernel husk separator then efficiently separate the kernels from the shells. This step increases the protein content of the subsequent meal by-product.

Flaking and Conditioning: The sunflower seed kernels are rolled into thin flakes by flaking machines. These flakes are then conveyed to multi-layered cooker for conditioning. Conditioning is critical as it adjusts moisture content and temperature, coagulates proteins, and breaks down oil cells, significantly optimizing the efficiency of the subsequent oil extraction step.

2. Oil Extraction

This is the core process of separating oil from the sunflower seed flakes. Two primary methods are used, often in combination.

Mechanical Pressing: The conditioned flakes are fed into a screw oil expeller. Inside the press chamber, a rotating screw shaft continuously advances the material, creating increasing pressure that squeezes out the oil. This is a physical process, which better preserves the oil's natural flavor and nutrients.

Solvent Extraction (Optional): The cake from the screw oil expeller retains some residual oil. TIn order to achieve the highest possible oil yield (over 99%), you can send this cake to a solvent extraction plant. Here, a food-grade solvent (typically hexane) dissolves the remaining oil. The solvent is then recovered from both the oil and the meal through distillation and is reused. The end products are crude sunflower oil and defatted meal.

3. Sunflower Oil Refining

Crude sunflower oil contains gums, free fatty acids (FFA), pigments, odoriferous compounds, and waxes. Refining machines remove these impurities to produce a clear, stable oil with a mild flavor and improved shelf life.

Degumming: This first step, often carried out using water or acid, removes hydratable and non-hydratable phosphatides (gums) to prevent the sunflower oil from becoming hazy.

Deacidification: An alkali solution (e.g., NaOH solution) is added to react with FFA, forming soapstock. This soapstock is then separated via centrifugation.

Bleaching: In a bleaching tank, adsorbents like activated white clay are mixed with the sunflower oil to remove pigments, residual soaps, and oxidation products, improving the oil's color.

Deodorization: This is a key step conducted under high temperature and vacuum. Steam is passed through the oil to strip away volatile odor and flavor compounds, resulting in a neutral-smelling and tasting oil.

Dewaxing: Specific to sunflower oil, this optional step removes waxes to prevent cloudiness at cooler temperatures. The oil is slowly cooled in crystallizer to allow wax crystals to form, which are then removed by filter.

4. Sunflower Oil Packaging and Storage

The final refined sunflower oil is stored in large tanks, often under a nitrogen blanket to prevent oxidation. The oil is then automatically pumped to filling machines to be packaged into bottles, plastic jugs, flexitanks, or drums. The packaging line typically includes capping, labeling, and case-packing machines, and is followed by palletizing for shipment.