Oilseed Pretreatment & Pressing Production Line

Ocean’s oilseed pretreatment and pressing line adopts internationally mature processing technology, adheres to advanced and proven technological principles. Equipment selection and layout prioritize safety, convenient conveying, cost efficiency, reduced labor intensity, and ease of management. The entire process is continuous and mechanized, equipped with advanced cleaning, stone removal, roasting, pressing, sedimentation, and centrifugal separation systems to meet the raw material requirements of the refining workshop. The process and equipment comply with food hygiene and quality supervision standards, emphasizing advanced and mature technology, operational safety, management convenience, and reduced labor intensity. The design also focuses on energy conservation, environmental protection, emission reduction, cost savings, and maximizing enterprise profitability.

Key Process of Oilseed Pretreatment & Pressing Production Line

Our oilseed Pretreatment & Pressing Production Line is engineered for high-efficiency, continuous processing of various oilseeds including soybeans, rapeseed, and sunflower seeds. Our integrated system transforms raw seeds into high-quality crude oil and cake, preparing them perfectly for the next refining stage or direct use.

1. Weighing, Cleaning & Conditioning

Raw soybeans, rapeseed, or sunflower seeds are transported from temporary storage to a high-precision weigh scale. After weighing, they pass through a magnetic separator to remove ferrous impurities, then move to cleaning and destoning equipment. Our specially configured vibrating screen and destoner effectively remove foreign materials like stones, sand, stalks, and husks. The cleaned seeds are then elevated into the conditioning tower. Here, indirect steam heating through staggered elliptical tubes and hot air drying in angular boxes soften the seeds (discharge temp. ~70°C) and reduce moisture content (typically by ~2%). A frequency-controlled discharge ensures stable throughput.

2. Dehulling System

Conditioned soybeans are cracked into 4-6 pieces by a toothed roller crusher. The mixture enters a hot-air cyclone system where hulls are separated. Hulls are collected and further screened; coarse hulls are ground for meal blending or packaging, while fine fractions are recycled. Dehulled soybean meats proceed to flaking.

3. Flaking, Expansion & Cooling System

Dehulled meats (or conditioned rapeseed/sunflower seeds) are flaked by a hydraulically controlled flaking mill. The flaked material can then be directed to an expander (for higher oil yield and controlled urease activity in meal) or to a horizontal conditioner/dryer. Expanded material at 105-110°C is cooled to ~60°C and optimal moisture (~9.5%) before being conveyed to solvent extraction. For non-expanded routes, flakes are dried to 9-10% moisture and stored temporarily.

4. Meal Crushing System

Meal from the extraction plant is first crushed and then screened. Oversized particles are ground through a crusher with a Φ6mm sieve to achieve uniform, desired meal particle size.

5. Rapeseed & Sunflower Seed Pre-pressing System

Rapeseed and sunflower seeds bypass the crusher. After conditioning, they are directly flaked. The flakes are heated to 90-100°C and dried in a horizontal conditioner/expander. They are then distributed to multiple screw presses for pre-pressing. The resulting cake is cooled to 55-65°C before being sent for solvent extraction.

6. Crude Oil Treatment System

Crude oil from the pre-press contains significant impurities. It first passes through a scraped conveyor to remove large solids, then enters a settling tank for bulk impurity removal. Finally, it undergoes filtration to eliminate fine particles. For optimal filtration, a vacuum dehydration unit removes moisture from the crude oil prior to the filter, ensuring superior oil clarity and stability.

Key Advantages

Clean
Production

The production line is designed to prevent leaks and spills under normal conditions. It includes dust and fume treatment systems to ensure effective ventilation, dust removal, and compliant emissions. Advanced automation reduces labor intensity, minimizes human error and contamination, and supports the implementation of strict workshop safety and hygiene management systems.

Tower-Type Layout for Energy Efficiency

Tower-Type Layout for Energy Efficiency
The entire pretreatment line adopts a compact tower-style layout. Material flow is primarily driven by gravity, minimizing reliance on mechanical conveying and substantially reducing overall power consumption.

Advanced Drying & Flake Treatment Technology

We utilize horizontal dryers to remove moisture from soybean flakes, effectively replacing traditional vertical cookers. This approach is also applied to rapeseed flake conditioning, offering benefits such as energy savings, reduced footprint, and improved quality of pre-pressed crude oil. For meal processing, a horizontal rotary sifter is employed to screen soybean meal, effectively reducing fines content and enhancing product uniformity.

Optimized Conditioning with Soybean Conditioning Tower

Our custom-designed conditioning tower features a rational heating and dewatering structure. This ensures uniform and thorough soybean heating while significantly reducing steam consumption. The conditioning temperature is easily adjustable for different raw material varieties, and a unique built-in humidification device provides exceptional flexibility when processing seeds with varying initial moisture content.

Raw Materials

Our Oilseed Pretreatment & Pressing Production Line is engineered to handle a diverse range of oilseeds, including soybean, rapeseed, sunflower seed, cottonseed, peanut, and other minor oilseeds, with adjustable parameters for moisture, temperature, and flake thickness, delivering high extraction efficiency and product quality for various feed, food, and industrial applications.

Main Equipment

Flaking Mill

Our anti-collision hydraulic flaking mill combines durability with high efficiency. Its high-grade alloy roller, produced via centrifugal pressure casting and coupled with a robust drive shaft, delivers exceptional rigidity. The proprietary square bearing pedestal ensures stable operation, while an intermittent electric pump in the hydraulic system maintains constant pressure with notable energy savings. Featuring fully automated controls, the mill produces uniform flakes consistently and quietly. Built with enhanced sealing and durable construction for extended service life, it is available in multiple models to meet diverse production needs.

Dehulling Machine

Our dehulling machine delivers high output with minimal fine powder generation and achieves excellent hulling results. Designed for durability, it features an extended service life and is equipped with a roll anti-collision mechanism to ensure safe roller operation. The machine offers strong operability and user-friendly convenience, with stable, reliable, and safe performance.

Screw Oil Press

Our screw oil press is a continuous pre-pressing and full-pressing equipment. It is suitable for extracting oil from high-oil-content oilseeds such as cottonseed, rapeseed, soybean, sunflower seed, and peanut. Key features include high processing capacity, low power consumption, reduced operating costs, dry cakes that are porous and structurally loose yet intact for optimal solvent penetration, and low residual oil content. It can be served as an ideal oil pressing solution for medium to large-scale oil mills.

Classic Cases

Hunan Panzhongcan 50TPD Tea Seed Pretreatment and Pressing Line

Hunan Guitaitai 50TPD Tea Seed Pressing, 30TPD Tea Seed Oil Refining and Dewaxing Line

Xinjiang Yili 150TPD Soybean Pretreatment, Extraction and 50TPD Refining Line

4.Xinjiang Qianhai 1300TPD Cottonseed Pretreatment, 1000TPD Extraction, 400TPD Cottonseed Oil Refining, 600TPD Cottonseed dry dephenolization.

Hubei Wuxue 1200TPD Cottonseed and Rapeseed Pretreatment and Pressing, 800TPD Cotton Cake and Rapeseed Cake Extraction Line

Hubei Geili 800TPD Rapeseed Pretreatment and Pressing, 600TPD Extraction Line

fREQUENTLY ASKED QUESTIONS

Q.What is the core feature that preserves the flavor in your fragrant rapeseed oil processing line?
- A: The key is the integrated fragrant oil pressing and refining process with aroma retention technology. This process, which includes precise roasting, allows us to capture and maintain the rich, traditional aroma of rapeseed oil while improving oil yield and ensuring food safety by avoiding risks such as benzopyrene overruns.
Q.How is a clean and hygienic production environment maintained in the pressing workshop?
- A:We employ a comprehensive oil fume capture and treatment process. Dedicated extraction systems at the roasters and presses efficiently collect fumes and vapors, preventing them from spreading in the workshop or depositing oil residue. These collected fumes are then treated before emission. Furthermore, a centralized recovery and treatment system for oil foot (gums) minimizes oil loss and significantly improves workshop hygiene.

Q.How does the automation system enhance production safety and efficiency?
- A: Our production line is managed by a fully networked PLC-based automation system. It enables centralized dynamic monitoring and control of the entire process. Key features include automatic control and data logging for critical parameters (temperature, level, current), comprehensive equipment interlocks, user-level access management for security, and rich alarm functions. This system minimizes manual intervention, reduces labor intensity, and prevents human error, ensuring stable, safe, and efficient 24/7 operation.
Q. What makes your pre-pressing system suitable for both large and medium-scale oil mills?
- A:Our pre-pressing system is designed with modularity and scalability in mind. Key equipment, such as the screw press, is selected for its high capacity, low energy consumption, and robust construction. The layout follows a vertical tower design where possible, allowing materials to flow by gravity, which reduces power usage and operational costs. These features make the line economically viable and efficient for both large, continuous operations and medium-scale batch processing, without compromising on cake quality (porous, low residual oil) or ease of management.

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