What are the methods of soybean pressing to make oil?

There are two types of oil pressing: hydraulic oil press and power screw press.

1) Hydraulic oil press to take oil.

Hydraulic oil press is a kind of pressing equipment that takes out the grease by squeezing the oil in the cake ring according to the principle of hydrostatic pressure transmission. The hydraulic oil press includes a hydraulic system.

There are two major parts of the oil press body, and its types are vertical and horizontal.

2) Power screw oil press to take oil.

The working principle of the power auger is that the rotating screw shaft is continuously propelled forward due to the propulsion action of the rotating screw shaft in the press chamber. At the same time, due to the spiral lead.

The shortening of the root circle and the gradual increase of the diameter of the root circle make the space volume of the press chamber continue to shrink, and the pressing effect on the pressed material. After the press is compressed, the grease is squeezed out of the gap in the press cage, and the press is pressed into a cake and discharged from the end of the press chamber.

The basic process of oil extraction of the screw press is generally divided into three stages, namely the feeding (pre-pressing) section, the main pressing section (oil output section) and the cake forming section (heavy pressure and draining section).

Soybean hot pressing process.

Soybeans are cleaned and crushed, steamed, fried, pressed, filtered, and crude oil are sent to the refining workshop.

Soybean cold (stupid pressing) pressing process.

Soybeans cleaned crushed Stupid soybean oil press filter crude oil to go to the refining workshop.

Soybean leaching oil process.

Soybean oil cleaning, screening, winnowing, stone removal, magnetic separation, side by side mud mistake cleaning, dust removal, soybean moisture regulation, crushing, softening, rolling, soybean extrusion, soybean oil leaching, mixed oil treatment, mixed oil purification and preheating, mixed oil evaporation, mixed oil stripping, soybean ** (crude oil) filtration, hydration degumming, alkali refining and deacidification, decolorization, deodorization, refined oil.

PressingSoybean oilThe difference with leached soybean oil is: different processing technology, different oil yield, different nutrients, and different smoke points.

1. The processing technology is inadvertently lost.

Pressing is the traditional process of putting the oil extraction substance such as peanuts in a container, and pressurizing the container to squeeze out the oil inside. Leaching is the extraction of the oil from it with a chemical organic solvent. Because the fats are soluble in these solvents.

It is relatively high, and it is easy to dissolve and then separate the oil from the solvent.

2. The oil yield is different.

Pressing soybean oil and leaching soybean oil because of its different preparation methods, so his oil yield is also different, pressing method, because it is pressed by physical means, to a certain extent, can not be a good soybean oil squeeze out, his oil yield is not high, in contrast, the preparation method of leaching soybean oil is prepared by chemical means, can leach the oil in the soybean well, the oil yield is relatively high.

3. The nutrient content of the wide hole is different.

Pressed soybean oil has a complete color, aroma and taste, and retains the characteristics of various nutrients, and the leached soybean oil is colorless, with a trace of gasoline flavor, and most of the nutrients are destroyed after processing.

4. The smoke point is different.

The smoke point of the pressed soybean oil is 166 degrees Celsius.

The smoke point of the leached soybean oil is 175 degrees Celsius. The refining conditions of leaching oil are harsher than that of pressed oil, with fewer impurities, high purity, high smoke point, and higher operating temperature when used. Press oil has a lower smoke point than leaching oil, so it is not suitable for high-temperature cooking, and leaching oil is more complex in refining than press oil, so the impurity content is much lower.

The method of soybean oil extraction is: soybean oil extraction needs to use the soybean oil press to extract oil, and it is difficult to manually extract soybean oil. Therefore, it is recommended to use a soybean oil press for oil extraction.

Soybeans are not only soybeans, but also black beans and green beans. Soybeans are nutritious and abundant, and the protein content is 2 times higher than that of pork and twice the content of eggs. The protein content is not only high, but also ***.

The amino acid composition of soybean protein is similar to that of animal protein, and the amino acids are relatively close to the ratio required by the human body, so it is easy to be digested and absorbed. If soybeans are eaten with meat and eggs, their nutrition can be compared with the nutrition of eggs and milk, and even exceed the nutrition of eggs and milk.

Soybean oil is an herbal vegetable oil extracted from soybeans.

1. Production process of soybean oil extraction equipment:

Soybean cleaning, steaming, frying, pressing, filtering, crude oil The main equipment of the refining workshop is composed of: hoist, cleaning screen, steaming wok, oil press, filter, crude oil temporary storage box, 2. Production process of soybean oil crude oil refining equipment.

The main equipment of crude oil alkali refining, degumming, decolorization, deodorization, and dewaxing workshop (or refined oil workshop) is composed of: refining tank, decolorization tank, deodorization tank, heat conduction oil furnace, filter, etc., soybean oil dewaxing equipment (optional) process.

In the processing of oils and fats, the inherent wax in the oils and fats can be separated from the oils and fats through the winterization dewaxing process, which can improve the nutritional value of the oils and fats and improve the taste and quality of the oils.

The main equipment consists of: freezer, filter, crystallization tank, refined oil tank, etc.

Soybeans can be pressed for oil, and the oil that is squeezed is called soybean oil. To be heated, to be heated evenly, the temperature is 60 degrees, not too high, the temperature is low and no oil is produced, the temperature is high and there is no nutrition, and the heating is finished for pressing.

Soybean oil is generally processed by various methods such as pressing and leaching to obtain crude oil with more impurities, and then refined to obtain edible refined oil. The pressing method is divided into two types: ordinary pressing method and spiral pressing method.

The ordinary pressing method is a method of pressurizing soybeans. This method is no longer widely used, especially in industrial mass production. The screw pressing method is to install a screw shaft in the cylinder of the horizontal device, and the pretreated soybeans enter the screw press; Squeeze out the grease as you move forward.

Generally, yellow soybean is pressed and leached, because the oil content of soybean is not as much as peanut, sesame, etc., so the leaching method can produce more soybean oil, first the clean soybean peeling, crushing, rolling, puffing treatment, puffed soybean through the principle of solvent leaching oil can obtain soybean leaching oil. Then remove solvent residues, gums, color acids, etc. from the oil, so that the soybean oil produced is soybean oil.

Now the soybean oil is pressed directly to the big knife, squeezed and squeezed out, needless to say, it is as dirty as always frying oil. Egg home. So now the oil is very long and very long. Throw the big knife into the machine and the oil will come out directly, and there will not be so many bundles.

Soybean hot pressing process.

Soybeans are cleaned up and crushed Steaming and frying Pressing Filtering Crude oil Go to the refining workshop soybean cold (stupid pressing) squeezing process.

Soybean cleaning crushing Stupid soybean oil press filter crude oil to the refining workshop soybean leaching oil process.

Soybean oil cleaning, screening, winnowing, stone removal, magnetic separation, side by side mud mistake cleaning, dust removal, soybean moisture regulation, crushing, softening, rolling, soybean extrusion, soybean oil leaching, mixed oil treatment, mixed oil purification and preheating, mixed oil evaporation, mixed oil stripping, soybean ** (crude oil) filtration, hydration degumming, alkali refining and deacidification, decolorization, deodorization, refined oil.

It is necessary to use an oil press to press, a large oil press is best, and a small domestic oil press can also be used.

Mix a little water in the soybeans to get wet, and then put them in the oil press.

Soybean oil is derived from soybean seeds, and soybean oil is the most produced oil in the world. There are many types of soybean oil, which can be divided into pressed soybean oil and leached soybean oil according to the processing method; According to the type of soybean, it can be divided into soybean**, genetically modified soybean oil.

1. The color of soybean oil is darker and has a special beany smell; The thermal stability is poor, and more foam will be produced when heated. Soybean oil contains more linolenic acid, which is more susceptible to oxidation and deterioration and produces "bean odor". From the perspective of edible quality, soybean oil is not as good as sesame oil, sunflower oil, and peanut oil.

2. From the perspective of nutritional value, soybean oil contains 7-10% palmitic acid, 2-5% stearic acid, 1-3% arachidic acid, 22-30% oleic acid, 50-60 linoleic acid and 5-9% linolenic acid. Soybean oil has a good fatty acid composition, it is rich in linoleic acid, has a significant effect on reducing serum cholesterol content, preventing cardiovascular diseases, soybean also contains a large amount of vitamin E, vitamin D and rich lecithin, which is very beneficial to human health. In addition, the human digestion and absorption rate of soybean oil is as high as 98%, so soybean oil is also an excellent edible oil with high nutritional value.

Question: Do you want to cool down a little after heating?

It's better to squeeze it while it's hot.

Operation instructions: soybeans are screened and impurities are screened with a specification of 12 mesh screens, so that the impurity content is less than 0 1%, and then enter the crushing, the degree of crushing reaches 2-4 petals, and then softened, so that the moisture content of soybeans is about 15%, and the softening time is 40-50 minutes, and then the embryo is rolled, and the use of the embryo has two points: one is to destroy the cell tissue so that the oil is easy to flow out of the cell, and the other is to roll the granular oilseeds into thin sheets, increase the surface area, and increase the oil production area. Moreover, it greatly shortens the distance for the grease to leave the blank; Enter the steaming wok, steam and fry until the moisture of the soybean is in the range of 1 5-2 8%, and the temperature is 100-110 degrees, and you can start to enter the oil press for pressing.

The thickness of the cake is controlled at about l-1 5 mm.

2. Cold pressing: soybean cold pressing can be carried out whole seed pressing, so that the moisture content of the whole seed pressing should be strictly controlled, generally controlled at about 8-10%, and pay attention to the heating of the oil press, and the temperature of the standby body can be raised to about 80 degrees before pressing. Artificial test method for high and low moisture content of soybeans when cold pressed:

It can be chopped by biting with the front teeth, and the molars are bitten into a flat shape, and there are cracks on the surface, and there is a slight noise; If it is flattened, it is too wet if it does not crack, and if it is broken with a loud sound, it is too dry, and it needs to adjust the amount of water before pressing.

3. Problems that often occur when screw oil solder presses soybeans: when soybean oil is squeezed by screw press, whether cold or hot pressed, different problems will occur due to improper operation or improper adjustment of oil moisture content.

There are different process methods of hot and cold pressing, you can refer to it.

You mean to open an oil mill, right? My family also runs an oil mill, and I bought an oil press from Jinan Huade Machinery Factory, which has a good reputation.

Soybean oil extraction process.

Soybeans are cleaned up and crushed Steaming and frying Pressing Filtering Crude oil Go to the refining workshop soybean cold (stupid pressing) squeezing process.

Soybean cleaning crushing Stupid soybean oil press filter crude oil to the soybean leaching process in the refining workshop.

Soybean oil cleaning, screening, winnowing, stone removal, magnetic separation, side by side mud mistake cleaning, dust removal, soybean moisture regulation, crushing, softening, rolling, soybean extrusion, soybean oil leaching, mixed oil treatment, mixed oil purification and preheating, mixed oil evaporation, mixed oil stripping, soybean ** (crude oil) filtration, hydration degumming, alkali refining and deacidification, decolorization, deodorization, refined oil.

The production process of edible oil needs to go through both pressing and refining.

1) Pressing process.

Edible oil pressing methods are divided into mechanical pressing (divided into high-temperature physical pressing and low-temperature physical pressing) and solvent pressing (also known as leaching method).

In the high-temperature physical pressing method, the oilseeds are crushed with a spiral press, and then the oil is pressed out at 120 high temperature and high pressure.

The solvent generally used in the leaching method is ethane (No. 6 light gasoline), which can squeeze out 98% of the oil in the oilseeds. After that, the solvent is evaporated at a high temperature of 150 °C. A part of ethane will remain in the oil, ethane is harmful to the human body, and it is also very damaging to the environment.

Because of production efficiency problems, large edible oil manufacturing plants generally use solvents and high temperature and high pressure to extract oilseed oil. But high temperatures also have a great impact on the quality of the oil.

Of course, in order to maintain the quality of edible oil, some manufacturers will press the oil out by low-temperature physical pressing. In this way, the oil seeds are crushed by a press and the oil is squeezed out at high pressure. The efficiency of this method is much lower than that of the high-temperature and solvent method, and the oil yield is only about 60%, but the quality of the edible oil can be fully guaranteed.

2) Refining process.

In the process of pressing, after high temperature and high pressure, solvent and other procedures, the oil will become foul-smelling and gray in color, so large edible oil manufacturers usually refine the edible oil to remove impurities. The refining process includes bleaching, deodorization, degumming, adding pigments, fragrances, etc.

Edible oil that is physically pressed at low temperature usually does not require these steps, and is mainly filtered, which retains the flavor of the oilseeds, including natural flavor, natural pigments, trace elements, and so on.

It can be seen that the oil pressing method has a great impact on the quality of the finished edible oil, which cannot be ignored.

Hello, the oil is fragrant and self-pressed, but there is also a question of quality. Generally, the oil sold in the market is refined soybean oil, which is made by neutralization, decolorization, and deodorization processes. In contrast, unrefined soybean oil may have aflatoxins and other causes of diarrhea due to the beans.

Generally speaking, the oil yield of soybeans is only about 20%, that is, 5kg of beans, and generally speaking, you can get up to 1kg of soybean oil. Industrially, soybeans are leached to achieve the maximum oil yield, and if the oil is pressed, the oil yield will be lower.

If you are worried about the soybean oil on the market, you can choose a big brand manufacturer.