How is rapeseed oil extracted, and how much oil can rapeseed generally produce?

Edible oil press, oil press is divided into household oil press and oil mill oil press according to the place of use, rapeseed oil is obtained through the physical pressure exerted by the oil press.

First of all, it must be dried. You can squeeze the oil when you take it.

According to the function, the oil press can be divided into screw oil press and hydraulic oil press.

1. Hydraulic oil press.

The hydraulic oil press is a traditional small oil press, and the production process is intermittent. The process is characterized by low operation technical requirements, high oil yield, and high crude oil, but the labor intensity is large. The applicable occasions of the hydraulic oil press are:

The processing capacity is small, the production is small, and the daily processing capacity of a single unit is about 1 ton.

2. Screw oil press.

The fully automatic screw press is an oil press that can operate continuously. The technical characteristics are: low operation technical requirements, high oil yield, poor crude oil quality compared with hydraulic oil press, and labor intensity lower than that of hydraulic oil press.

The automatic screw press is suitable for small processing capacity, small workshop production, and the daily processing capacity of a single machine is about 2-8 tons.

3.Large and medium-sized screw oil press units.

The screw oil press unit is suitable for large and medium-sized, continuous and large-capacity oil plants. The technical characteristics are: continuous production, low labor intensity, and high oil yield.

1. Production process of rapeseed oil extraction equipment:

1.Cold-pressed process: rapeseed, cleaning and impurities, cold-pressing, cold-pressed crude oil, coarse filtration, refining, cold-pressed oil, rapeseed cake.

2.Hot pressing process: rapeseed, cleaning and impurities, steaming and frying, pressing and squeezing oil, precipitation, refining tea oil; The main equipment components: hoist, cleaning screen, steaming wok, oil press, filter, crude oil temporary storage box, second, rapeseed oil crude oil refining equipment production process.

Crude oil one alkali refining one degumming one decolorization one deodorization one dewaxing workshop (or refined oil workshop).

The main equipment consists of: refining tank, decolorization tank, deodorization tank, heat conduction oil furnace, filter, etc.

Third, rapeseed oil dewaxing equipment process.

In the processing of oils and fats, the inherent wax in the oils can be separated from the oils 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.

The cost of equipment is related to the capacity, configuration, and quality of refined oil requirements, which cannot be said in a word;

Generally, 100 kg of rapeseed produces about 37 kg of oil, and the oil yield is about 40%, which can squeeze out 40 kg of oil. It mainly depends on the quality of rapeseed and the quality of oil extraction equipment, according to national standards: 1 oil content level oil content level oil content level oil content 33%.

Improve the oil yield of rapeseed:

The oil yield of rapeseed is generally only 30% to 40%. The following tips can be used to increase oil yield by up to 25%.

1.Remove impurities. The sediment contained in rapeseed will absorb oil during processing, thereby reducing the oil yield. Therefore, impurities such as sediment in rapeseed should be screened out before processing.

2.Control the fire. Generally, when using a frying pan to fry rapeseed, it is only out of the pot when all the rapeseed is fried, and some of the rapeseed will stick to the bottom of the pot and be burned in each batch.

Therefore, when the rapeseed is fried to eight maturity, it is necessary to hit the upper stove and seal the lower air outlet to control the fire. The specific operation method is: build a movable groove on the stove wall, embed a movable iron plate, and lift the iron plate up to seal the furnace mouth when a large fire is needed

When it is time to simmer, lower the iron plate and seal the air outlet.

3.Improvement of oil extraction equipment. When the 95 type horizontal shaft driven oil press is used to modify the snail press, the old No. 6 snail can be used instead of the No. 5 snail, which can increase the internal pressure and move the oil outlet back 8 10cm.

This improvement alone can produce 1 2kg more oil per 100kg of rapeseed.

4.Hot material squeezed. Oil molecules are most active at high temperatures. The temperature of the rapeseed that has just been fried out of the pot is 108, and you can squeeze it while it is hot to produce more oil. Therefore, it is best to control the amount of seeds fried in each pot at 40 50kg, so as to squeeze with frying to ensure that the hot material is pressed.

5.Mix with bran to taste. Rapeseed has a high oil content, and it slides quickly after pressurizing in the pressurizer, and the rapeseed cake is out of the press before the oil is fully squeezed out.

For this reason, 5 7kg of bran can be mixed into every 100kg of rapeseed, good rapeseed can be mixed more, and poor rapeseed can be mixed less. The bran should be fresh and free of impurities, and the ash should be sifted away. Adding grain bran can slow down the sliding speed of rapeseed, so it can squeeze more oil.

Mix the oiled feet into the bran and sandwich them in the middle of the rapeseed to squeeze them, which can also improve the oil yield.

The oil yield of rapeseed is about 40%, that is, one pound can produce 4 taels of oil, and the cholesterol content of rapeseed oil is lower than that of other oils, so it is more suitable for the elderly and people with high blood lipids, which can not make people fat. The quality is inferior to olive oil and superior to other oils.

Extended information: How to store rapeseed.

Salt mixing method. Mixing salt into freshly harvested rapeseed reduces moisture, inhibits enzyme activity, and makes fat less likely to break down. 1 gram of salt per 100 grams of rapeseed can maintain the stability of its storage within 5-6 days, and the oil yield can still maintain 95% of the original.

Containment method. After the rapeseed is removed, it is immediately sealed with plastic film, forming a natural lack of oxygen. Although the quality of rapeseed with high moisture is slightly reduced by this method, it can make rapeseed not sprout, not heat, and not mildew within 7-10 days, and can win time and stand by to dry.

Spread and dry method. Spread the rapeseed on a drying utensil and place it in a ventilated place. When spreading rapeseed, it should be thin and even, and turn it every 1 hour.

Drying method. Where conditions permit, it can be dried with a dryer. However, the temperature of the hot air can not exceed 80-85, otherwise, the quality of rapeseed will be affected.

Generally, the oil yield of rapeseed is about 40%, and 100 catties can squeeze out 40 catties of oil. It mainly depends on the quality of rapeseed and the quality of oil extraction equipment, according to national standards: 1 oil content level oil content level oil content level oil content 33%.

The oil yield of rapeseed is also related to the dryness and wetness of rapeseed, the pressure of the oil press, the heat of frying, and the oil purifier. The oil yield of rapeseed is generally only 30%, and if the appropriate method is adopted, the oil yield can be increased by 2% 5%.

The oil yield of rapeseed in the oil press is about 32%-36%, and one pound of rapeseed can be pressed for more than three taels of rapeseed oil. A pound of rapeseed can generally squeeze about three, two or four oil.

Rapeseed oil extraction, now use machines to press, the oil output is high, normal 100 catties at least 30 oil.

Under normal circumstances, per 100 catties of rapeseed, the oil yield is 30---40 catties, that is to say, the oil yield is 30%-40%.

Generally, a pound of rapeseed can be squeezed three taels eight to four taels

This looks at the machine. Don't look at the raw materials. There are three or four courses. There is one.

First, first place rapeseed.

Dried in the sun and cleared, the oil squeezed out will be clean and free of impurities. When squeezing the oil, the wok is first fired at 70 degrees, and the rapeseed in the pool is rolled into the wok by the screw.

Second, the general sun-dried rapeseed only needs to be stir-fried for 20 minutes, when the temperature gauge points to 150 degrees of high temperature, then the rapeseed has been fried, the staff must open the wok-gate gate as soon as possible, and put the rapeseed into the second pool.

Third, Jiaolong will suck the fried rapeseed into the iron bucket of the oil press and start to extract oil.

Fourth, open the iron bucket gate to flow rape into the press shaft, so that the vegetable oil flows into the iron plate from the press shaft, and then flows into the barrel containing oil through the iron trough.

5. Place rapeseed oil.

Pour into a filter and filter, it takes five minutes to filter each barrel of rapeseed oil.

6. Pour the filtered rapeseed oil into an aluminum barrel to boil the rapeseed oil and remove phosphorus.

7. Pour the dephosphorized rapeseed oil into the cooler to cool, and it only takes seven or eight minutes to drop from a high temperature of more than 150 degrees to about 50 degrees, and then put the cooled rapeseed oil into an iron drum.

8. Finally, pour the cooled rapeseed oil into the prepared plastic bucket.

Unhealthy. Many people think that this kind of "unprocessed by modern industrial means" and "no additives" of earth-pressed oil is more natural, nutritious and healthy, in fact, it is completely contrary to modern food science, and it does not meet the national standards for safety.

In the process of making clay oil, it is generally treated at high temperatures, which will form some benzopyrene, which is a possible carcinogen.

Because the clay oil has not been refined, it may also contain many unknown risks such as heavy metals and pesticide residues.

Healthy. However, it depends on whether the raw materials, rapeseed production process is healthy and safe, and whether the production process of oil extraction is standardized and safe.

Self-pressed rapeseed oil, because its process is relatively simple compared to professional manufacturing, so there are more impurities inside rapeseed oil. Homemade rapeseed oil may not be able to filter out the toxic substances inside the rapeseed oil due to the limitations of tools, practices, materials, etc., so it is necessary to pay attention to the safety of eating rural self-pressed rapeseed oil.

Self-pressed rapeseed oil is generally after harvesting rapeseed, after a simple drying and dust removal operation, the press tool is used to start crushing rapeseed oil to extract oil. Although the rural self-pressed rapeseed oil is pure and pollution-free, this kind of oil extraction has impurities, and it cannot be removed and purified by artificial methods.

1. Drying and cleaning process. In the process of harvesting or drying, rapeseed may be mixed with impurities such as sand, soil, rape stems and leaves, etc., if these impurities are not effectively treated, which will not only cause the quality of cake to be poor but also lead to a decrease in the quality of oil. In addition, if the oil contains sand and gravel, mechanical impurities, etc., it will also cause damage to the oil extraction equipment.

Therefore, in order to ensure the smooth progress of production, it is necessary to carry out a certain cleaning of impurities before pressing.

2. Heat treatment of rapeseed. Heat treatment is one of the effective methods to improve the oil yield of rapeseed, and it is also an important process in oil production. The so-called heat treatment is the heating of the oil, also known as steaming or frying.

Raw rapeseed is sent to the oil pressing equipment after heat treatment, which is called hot pressing, which can improve the oil yield. The quality of heat treatment can have a certain impact on the oil yield of rapeseed and other oilseeds to a large extent.

3. Squeeze out the oil. Because the shape of rapeseed is different from other oilseeds. Therefore, in the process of pressing, the requirements for snail and chamber are also different from those of other oil presses.

In production, it is required that the snail should be zigzag curve and cone, which is conducive to the rapeseed molecules to be fully destroyed and achieve the maximum oil output.