Oil Extraction Production Line

Ocean’s oil extraction production line adopts internationally advanced solvent extraction technology, featuring a fully continuous, automated, and enclosed design. It ensures high oil yield, low solvent consumption, excellent product quality, and meets strict environmental and safety standards. Suitable for large-scale processing of soybeans, rapeseed, sunflower seed and other oilseeds, the line integrates intelligent control, energy recovery, and efficient solvent recycling to deliver stable and economical production.

Key Process of Solvent Extraction

1.Extraction Section

Pre-treated materials enter a closed-loop extractor where solvent percolates through the bed, dissolving oils efficiently. The system maintains optimal temperature and solvent-to-material ratio, ensuring residual oil in meal below 0.5%. A gas detection system and automatic interlocks prevent solvent leakage and ensure safety.

2.Desolventizing & Toasting (DTDC)

Wet meal containing solvent is conveyed to a multi-layer DTDC desolventizer-toaster. Through indirect heating, direct steam stripping, and hot/cold air treatment, solvent is fully removed, meal moisture and temperature are adjusted, and final meal quality meets feed standards. Solvent vapors are recovered for heat reuse

3.Mixed Oil Evaporation

Mixed oil from the extractor undergoes two-stage negative-pressure evaporation. Secondary steam from the DTDC and waste steam from ejectors are reused as heat sources, greatly reducing fresh steam consumption. Oil concentration reaches over 95% before entering the stripping tower.

4.Solvent Stripping & Oil Recovery

Concentrated mixed oil is treated in a vacuum stripping tower with direct steam to reduce residual solvent below 300ppm. Finished oil is cooled through a heat exchanger and sent to storage. Solvent vapors are condensed and recovered.

5.Solvent Condensation & Recycling

All solvent vapors from various stages are condensed through a multi-stage condensation system. Condensates enter a water separator for automatic solvent-water separation. Solvent is recycled to the system, and wastewater is treated to meet discharge standards.

6.Tail Gas Recovery

Uncondensed gases pass through a mineral oil absorption system, where solvent is absorbed and later desorbed for reuse. Cleaned gas is discharged safely, minimizing solvent loss and environmental impact.

Key Advantages

High Extraction Efficiency

Advanced extractor design ensures thorough oil separation with low solvent ratio and high mixed oil concentration (>30%), reducing energy consumption in evaporation

Energy-Saving Design

Multi-stage heat recovery utilizes secondary steam and waste heat from the process, cutting steam usage by 30% or more. Oil-oil heat exchangers further optimize thermal efficiency.

Fully Automated & Intelligent Control

PLC-based centralized control enables real-time monitoring of temperature, pressure, level, and flow. Automated interlocks, safety alarms, and remote operation ensure stable, safe, and labor-saving production.

Closed & Environmentally Friendly

Entire process is enclosed to prevent solvent escape and odor diffusion. Exhaust gases are collected and treated, wastewater is minimized, and solvent recovery rate exceeds 99%, meeting strict environmental regulations.

Raw Materials

Our solvent extraction production line is suitable for the large-scale processing of various oilseed materials, including soybeans, rapeseed, cottonseed, sunflower seeds, peanuts, corn germ, etc. It efficiently and stably extracts vegetable oils, widely used in the feed, food, and bioenergy industries.

Classic Cases

Kazakhstan 300TPD Sunflower Seed Pretreatment & Pressing, 100TPD Oil Extraction Production Line

Guangdong 1500TPD Soybean Expanding & Extraction Production Line

Xinjiang 400TPD Cottonseed shelling, 240TPD oil pressing, 200TPD Extraction Production Line

Hubei 1200TPD Cottonseed, Sunflower Seed & Rapeseed Pre-pressing Line, 800TPD Cotton cake and Sunflower/Rapeseed Cake Extraction Line

Hubei Geili 800TPD Sunflower Seed & Rapeseed Pre-pressing Line, 600TPD Extraction Production Line

Sinograin 2000TPD Rapeseed and Soybean oil Extraction and 500TPD Refining

Xinjiang Qianhai 1300TPD Cottonseed Pretreatment and 1000TPD Extraction Production Line

Xinjiang Yili 150TPD Soybean Pretreatment and Extraction Production Line

Hunan Guitaitai 100TPD Tea Seed Pressing, Extraction, Packaging, Automated Warehouse System

Main Equipment

Extractor

The extractor adopts a fully enclosed, continuous-loop design, ensuring thorough oil extraction through efficient percolation and soaking. It operates with a low solvent-to-material ratio and maintains a stable temperature and pressure. Equipped with automatic level control, gas detection, and safety interlocks, it achieves a residual oil content in meal below 0.5% while supporting high mixed oil concentration (above 30%). The system is designed to prevent solvent leakage and ensure operational safety.

Evaporator

The evaporation system consists of a two-stage negative-pressure evaporator. It utilizes secondary steam from the desolventizer-toaster and waste steam from ejectors as heating sources, significantly reducing fresh steam consumption. The mixed oil is concentrated to over 95% before entering the stripping tower. The evaporator features automatic pressure and temperature control, ensuring stable and energy-efficient operation.

Desolventizer-Toaster (DTDC)

The multi-layer DTDC desolventizer-toaster removes solvent from wet meal through indirect heating, direct steam stripping, and hot/cold air treatment. It adjusts meal moisture and temperature to meet feed standards while fully recovering solvent vapors for heat reuse. The system includes automatic bed-layer control, temperature regulation, and gas detection to ensure complete solvent removal and safe, environmentally friendly operation.

FAQ

Q.How is safety ensured in the extraction workshop?
- A: The plant is equipped with gas detectors, automatic ventilation, explosion-proof motors, pressure/vacuum alarms, and PLC-controlled emergency shutdown systems to ensure safe operation.
Q.What is the residual oil in meal?
- A:Typically below 0.5% for soybeans and 0.8% for rapeseed, meeting high-quality feed standards.

Q.Can the line process different oilseeds?
- A: Yes, the system is flexible and can handle soybeans, rapeseed, sunflower seeds, etc., with minor adjustments to pretreatment and extraction parameters.
Q. Is the process environmentally friendly?
- A:Yes, the system is enclosed, solvents are efficiently recycled, exhaust gases are treated, and process wastewater is minimal and properly managed.

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