The peony seed oil production line is a production equipment configuration from raw materials to finished peony seed oil. The process requires cleaning, peeling, crushing, steaming, pressing, refining and other processing steps to obtain healthy and high-quality peony seed oil. The main processes used in industrial production of peony seed oil include pressing and leaching. Pressing is a physical extraction process that does not add any additives during production, preserving the original flavor and nutrition of peony seed oil, which is in line with consumers’ green and healthy concepts. However, the oil yield is low, making it suitable for small capacity oil mills; The leaching process can fully extract residual oil from peony seed oil, further improve oil yield, reduce production costs, and improve the quality of peony seed meal, making it suitable for high-capacity oil factories.

The peony seed oil equipment has the following characteristics:

1. Cold pressing equipment, mainly used for cold pressing, can also be used for hot pressing.
2. Using shell pressing technology, the pressed oil has a light color and low acid value.
3. The peony seed oil equipment fully maintains the nutritional components of the raw materials.
4. The workshop production line has a high degree of automation and can also use touch screens or computers.

Deacidification and deodorization are distillation based physical processes equipped with a combined deacidification and deodorization tower. This tower has the functions of physical deacidification and removal of benzo [a] n, which can reduce the consumption of refined caustic soda and activated carbon, effectively ensure the peroxide value, and avoid oil color and acid reflux at high temperatures.

Process flow of peony seed oil production line

Crude oil → Degumming → Discoloration → Filtration → Deacidification and deodorization → Crystallization → Crystallization → Filtration → Finished oil

Preparation process of peony seed oil:

　　 Seed cleaning and impurity removal: When seeds are harvested, dried, packaged, transported, and stored, it is inevitable that they will be mixed with sand, soil, stems and leaves and other debris. Removal of impurities improves oil quality and oil yield, reduces equipment wear, increases output and reduces energy consumption. Vibrating screen is used to remove impurities, and the impurity content of seeds after removal is <0.05%.

Seed shelling and kernel shell separation: Seed shelling is to increase oil yield, reduce oil loss, improve oil and cake quality, give full play to the production capacity of oil production equipment, reduce equipment wear and maintenance costs, and reduce production It consumes electricity and is conducive to the comprehensive utilization of the leather case. The shell content in the kernel is <8%, the kernel content in the shell is <0.5%, and the moisture content is 10-12%.

　　Moldy seed kernel removal: During seed harvesting, drying and storage, some seeds will inevitably become moldy and deteriorated due to weather and improper storage. The moldy kernels are removed to improve the quality of oil. Peony seeds are naturally white, and spoiled seeds can only be seen after peeling. Deteriorated seeds can only be sorted manually, and the picking rate is required to be ≥99%.

　　 Stir-frying: Stir-frying can condense oil, adjust the structure of the material, improve the quality of oil, increase output, and reduce power consumption. The frying pan is made of heat-conducting oil, and the frying temperature is below 130℃. Baking time is 40-50 minutes.

　　 Squeezing oil: A screw press is used for oil production. The whole process of oil extraction does not involve any chemical additives to ensure that the oil is safe, hygienic, pollution-free, and natural nutrition is not destroyed.

Peony seed oil refining process:

1. Degumming: Colloidal impurities in the crude oil, mainly phosphorus. The presence of phospholipids and other gelatinous substances not only reduces the quality of the oil, but also promotes a transitional emulsification between the oil and alkali solution during the alkaline refining and deacidification process, increasing the difficulty of soap separation and exacerbating the loss of neutral oil. Therefore, it should be removed thoroughly first. Peony seed oil has a low phospholipid content and does not require separate degumming during production. It can be processed together with the deacidification process.
   Hydrate and degumm, heat up to 60 ℃ with stirring, add boiling water with 4-5 times the phosphorus content in the oil, and the water temperature is slightly higher than the oil temperature. When necessary, dissolving 0.2% -0.3% salt by weight of oil in water can improve the hydration effect. Adding water is the most important stage of hydration, and it is necessary to carefully control the amount of water added, the temperature of water and oil, the speed of stirring and adding water, etc. During hydration, it is necessary to frequently use a spoon to take samples from the pot for observation, and flexibly control the amount and speed of water addition according to the situation. After adding water, when the rubber particles start to aggregate, start stirring slowly and raise the temperature to 75 ℃. When the liquid level shows a clear oil path, stop stirring and let it stand for 3-4 hours, 4-5 hours in winter. Until the separation of hydrated oil foot and grease is qualified, the oil foot is released, and the degummed oil enters the next procedure.

2. Deacidification: Oil deacidification mainly involves removing free fatty acids from crude oil, as well as small amounts of gum, pigments, and trace metal substances in the oil. Deacidification operation is one of the important factors directly affecting the oil yield and quality of oil refining.

Alkali refining and deacidification method: Pour the clean oil pump into the pot, stir evenly, and raise the oil temperature to 60 ℃. Simultaneously perform rapid stirring at a speed of 60 revolutions per minute, evenly spray the measured alkaline solution into the oil, and continue to stir rapidly to fully mix it with the oil. Then switch to slow stirring at a speed of 30 revolutions per minute. At the same time, raise the temperature to 75 ℃ until the oil and soap particles are clearly separated and easy to precipitate. Stop bubbling and let the soap particles settle. Let it stand for 3-6 hours, then wash it with hot water slightly above the oil temperature to remove any remaining impurities such as soap particles in the oil. When the oil temperature drops to 60 ℃, start filtering and enter the next program.

3. Discoloration: The color and other impurities of the oil must undergo decolorization to meet the product quality standards. At the same time, it provides more favorable conditions for steam extraction and deodorization. To achieve the final required color index of the product for decolorization; Remove relevant pigments and quantity of metals; Further remove trace amounts of soap residue, phospholipids, and other glial impurities, as well as certain odorous substances, from the oil and fat; Remove polycyclic aromatic hydrocarbons and residual pesticides; Reduce the peroxide value of oil quality.

Use activated clay as a decolorizing agent, and add an appropriate amount of activated carbon if necessary. The decolorized oil is sucked into the decolorization pot from the oil storage tank by vacuum action, heated to 90 ℃ under vacuum, and the air and moisture in the oil are removed accordingly. Inhale liquid decolorizing adsorbent again (the dosage is generally between 1-5% of the oil weight according to the color standard achieved by decolorization), and under vacuum stirring conditions (vacuum is 8 kPa absolute pressure), the oil and agent are in contact for about 30 minutes, cooled to 70 ℃, and pumped into a filter machine to remove the decolorizing agent and obtain decolorized oil.

4. Deodorization: The purpose of oil deodorization is to remove odor causing substances and other volatile substances from the oil, improve the odor and color of the oil, and enhance the stability of the oil quality. The unique odor of oil, the peculiar smell produced during decolorization, and the clam odor produced by oil oxidation.

In the deodorization stage, it is required to directly spray these unwanted odors into steam distillation at high temperature under vacuum to remove them. Firstly, open the steam valve and cooling water valve of the solar term jet vacuum pump to evacuate the deodorization pot. When the vacuum degree reaches a certain level, open the oil valve and use the vacuum to suck the decolorized oil into the deodorization pot. Then open the heat transfer oil valve to raise the temperature inside the pot to 190 ℃. When the temperature reaches 100 ℃, open the direct steam to fully stir the oil in the pot. Spray direct steam for about 3 hours. During the entire deodorization process, the vacuum must be maintained at a residual pressure of 0.13-0.8 kPa, and the direct spray amount is about 5% -15% of the weight of the processed oil. Close the heat transfer oil heating system 30 minutes before the deodorization time. After the oil deodorization is completed, close the direct steam and open the cooling door to cool the oil below 70 ℃. Finally, turn off the vacuum pump, break the vacuum, and pump out the deodorized and clean oil.

5. The wax in dewaxed oil mainly exists in the skin and can dissolve in the oil above 40 ℃. At low temperatures, it will form a precipitate. Peony seed oil contains 0.06% to 0.2% wax. Oil dewaxing is the process of separating high melting point wax and high melting point solid fat contained in liquid oil through forced cooling, and then removing them through filtration or centrifugal separation.

After heat exchange, the deodorized oil is pumped into a stainless steel crystallization tank after the oil temperature drops to 22-25 ℃. Under stirring, the circulation of refrigerant in the coil slowly cools it down to 18 ℃ to form crystals. The crystallization time is about 3 hours. Inject the crystallization oil into the crystallization tank and incubate the crystals at a constant temperature of 18 ℃ for 3 hours, then filter to obtain the de waxing oil.