Walnut oil processing technology and equipment selection technology

1. Comparison of core processes of walnut oil processing

1.1 Technical characteristics of cold pressing process

• Temperature control : strictly maintain a low temperature environment of 40-60℃

• Nutritional retention : Vitamin E and polyphenol retention rate ≥ 92%

• Oil yield : 35%-40% (15-20 percentage points lower than hot pressing)

• Market positioning : Organic food/maternal and infant food sector has a 30-50% premium

1.2 Technical characteristics of hot pressing process

• Pretreatment process : Steaming and frying at 110-130℃ with 0.3MPa steam pressure

• Flavor formation : Maillard reaction increases flavor substances by 40%

• Oil yield : 55%-60% (crushing degree must be above 95%)

• Applicable scenarios : Bulk purchasing channels such as restaurant chains and industrial oils

2. Pressing Equipment Selection Matrix

3. Intelligent Upgrade Solution

1. Online detection system : Near infrared spectrometer real-time monitoring of acid value (≤0.3mg/g)

2. Energy-saving transformation : waste heat recovery device reduces steam consumption by 25%

3. IoT platform : Equipment OEE (overall equipment efficiency) increased to 85%+

4. Penguin Group Customized Services

• Process package design : providing a full process solution from walnut cleaning → shelling → pressing → refining

• Energy efficiency optimization : CFD simulation reduces energy consumption in the press section by 15%

• Certification support : Assist in obtaining ISO22000/FSSC22000 system certification