Huatai's Advanced Peanut Oil Pretreatment Machine: From Raw Peanuts to High-Quality Oil

Huatai Oil & Grain Machinery Co., Ltd. has developed a specialized peanut oil pretreatment machine designed to optimize the entire peanut oil production process. This machine is tailored to handle everything from stone removal and shelling to low-temperature roasting, ensuring the natural aroma of peanuts is fully stimulated.

Key Features of Huatai's Peanut Oil Pretreatment Machine

1. Comprehensive Cleaning and Classification

Cleaning: Peanuts often come with impurities such as mud, stems, and leaves. These impurities can affect the quality of the oil and oil cakes, and may absorb fat, reducing the oil yield. Huatai's machine uses various methods to clean peanuts, including air streams to remove lightweight impurities and screens to filter out smaller residues. Electromagnets or permanent magnets are used to separate metal materials, ensuring safety and efficiency.
Classification: The sizing screen isolates immature granulocytes, moldy grains, broken grains, and other imperfections in the peanut raw materials.

2. Efficient Drying and Peeling

Drying: An air dryer controls the moisture content of peanut raw materials to between 5% - 6% after drying. It also reduces the temperature of the oil particles below 40℃ using cold air, ensuring optimal conditions for subsequent processing.
Peanut Crushing and Peeling: The roll crusher removes the red skin of peanuts, and a flat wind suction screen separates the red peanut mantle, which can be used as a raw material for pharmaceuticals and chemicals. Shelling reduces shell absorption of fat, improves oil yield, increases processing capacity, and lowers machine wear. It also ensures high-quality oil cakes that have a wide range of applications.

3.Hot Roasting and Cooling

Hot Roasting: Approximately 25% to 30% of peanut materials are sent to the hot air oven and heated to 180℃ - 200℃. Roasting temperature is crucial for producing fragrant peanut oil.
Cooling: Rapid cooling is essential after roasting to prevent oilseeds from sticking and spontaneous combustion. The crusher then breaks the peanuts into smaller granules.

4. Steaming and Roasting

 The vertical steam boiler processes the material to a discharge temperature of 108 - 112℃ with 5% to 7% humidity, ensuring a rich peanut oil flavor. The indirect steam pressure of the steam boiler must be at least 0.6 mPa.

5.Peanut Kernels Cooking

    Cooking is a vital step in peanut oil extraction. Adding 8-10% water before cooking helps in the process. The cooked peanuts, known as ripe billets, are then pressed using a hot press method. The cooking process directly affects the smoothness of pressing, oil yield, and oil cake quality. When the moisture content is close to 1-2% and the temperature reaches 120-130℃, the peanuts are ready for pressing.

6. Peanut Oil Press

   Huatai's screw oil press is widely used in small-scale peanut oil plants. This machine maintains a pressing temperature of 135℃, with a humidity of 1.5% to 2%, and a residue of 9% to 10% in the peanut press cake. Its simple operation and high pressure ensure continuous processing. The crude peanut oil, after precipitation and filtration through a vertical leaf filter, is sent to the peanut oil refining plant. The peanut oil cake is sent to the peanut oil solvent extraction plant for secondary extraction. The refined crude oil is sold as ordinary oil.

Why Choose Huatai for Your Peanut Oil Production?

Advanced Technology: Huatai's peanut oil pretreatment machine uses intelligent temperature-controlled screw presses for slow physical pressing, retaining the rich original peanut aroma while avoiding high-temperature damage to nutrition.
High Yield and Quality: The machine ensures high oil yield and pure oil, free of impurities, making subsequent refining easier.
Customized Solutions: Huatai offers tailored solutions to meet your specific needs, ensuring optimal performance and efficiency.
Global Experience: With over 35 years in the oil extraction and refinery field, Huatai has installed projects in various countries, ensuring global standards are met.