Tunable Seed Oil Expeller Press for Cold Extraction
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Solution Overview
Problem
Conventional seed oil extraction methods involve crushing, grinding, and high-pressure processing, leading to residual seed particles in the oil, oxidation, and catalytic conversion, which are undesirable characteristics.
Innovation Solution
A seed oil expeller press design that eliminates seed rotation and uses a symmetrical knifed press head to extract oil without crushing or grinding, allowing for precise control of pressure, temperature, and seed feed rate to achieve cold press conditions, thereby eliminating the need for filtration and preventing oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional high pressure compression is used to extract oil from seeds, then oil extraction efficiency is improved, but seed particles are crushed and ground leaving residual particles in the oil requiring filtration
Solution Approach 1:
The patent changes the extraction parameters by using a cold press method with pressure控制在100-200 atmospheres and temperature maintained below 130°F, which is lower than conventional methods. This parameter adjustment allows sufficient oil extraction while preventing seed particle crushing and grinding, thus eliminating the need for filtration
Solution Approach 2:
The patent applies partial compression force rather than excessive high pressure. By using a screw press mechanism that gradually compresses seeds with controlled pressure increase, the system achieves adequate oil extraction without applying enough force to crush seed particles, thereby maintaining particle integrity
2Productivity
If high pressure compression is applied to extract oil, then oil yield is improved, but temperature of extracted oil increases causing oxidation and catalytic conversion
Solution Approach 1:
The patent implements cold press extraction with temperature严格控制below 130°F, which is significantly lower than conventional hot press methods. This temperature control parameter change prevents oxidation and catalytic conversion of the oil while maintaining adequate extraction yield through extended pressing time and optimized pressure application
Solution Approach 2:
The patent applies preliminary cooling measures by using a water-cooled press chamber and pre-cooling the seeds before extraction. This preliminary action prevents temperature rise during compression, allowing high pressure application for good oil yield without the harmful temperature increase that causes oxidation
3Productivity
If seeds are fed at high rate through rotating auger, then processing speed is improved, but seed rotation and abrasion increase causing crushing and grinding
Solution Approach 1:
The patent inverts the conventional feeding mechanism by using a stationary screw press that pushes seeds through a fixed die, rather than using a rotating auger that tumbles and abrades seeds. This inversion of the feeding approach eliminates seed rotation and abrasion while maintaining processing speed through continuous linear feeding motion
Solution Approach 2:
The patent introduces a stationary die as an intermediary element between the feeding mechanism and the seeds. The die provides a fixed opening through which seeds are pressed, preventing seed-to-seed rotation and abrasion that occurs in rotating auger systems, while still allowing high-rate processing through continuous feeding
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the extraction of up to 95% of seed oil without raising the oil temperature above 130 degrees F, maintaining seed integrity and preventing oxidation, resulting in high-quality oil without residual particles.
Implementation Method 1
Compress the seeds at a high pressure until they give up their oil
Implementation Method 2
the seeds are compressed under abrasive rotation between the contact surfaces of the extraction chamber
Implementation Method 3
The crushing tearing and grinding of the seed leaves residual seed particles in the seed oil... The high pressure on the seed raises the temperature of the oil extracted
Data Source
AI summary
A low speed seed oil expeller press with the capability of extracting oil through a new design that does not crush or grind the seed so as to eliminate the need for filtration and maintain the seed oil at a temperature below 130 degrees F. The seed oil expeller press has a seed preheating capability and controls the pressure and extraction oil temperature by manipulation of the expeller speed, the head volume and the size of the pressed seed exit orifice. The seed oil expeller press eliminates seed rotation within the head volume so as to eliminate crushing, grinding or tearing of the seed by a symmetrical knifed press head. The seed oil expeller press regulates seed temperature, seed feed rate, seed pressure, seed rotation and extracted seed oil temperature so as to compensate for the seed size, seed hardness and seed oil content, so as to allow for seed compression without crushing or tearing to accomplish seed oil extraction at a low (cold press) temperature.