Cottonseed oil production equipment
Cotton is cultivated in many parts of the world, but it is mainly produced in China, Uzbekistan, the United States, India, Pakistan, Egypt and Turkey, etc. It is one of the common oil crops. The oil content of cottonseed with hull is 17%-20%, and the oil content of cottonseed without hull is 33%-40%. So how to get cottonseed oil from cottonseed? What cottonseed oil production equipment is needed?
There are generally two production methods of cottonseed oil: pressing method and leaching method. If your cottonseed oil production is 1-10 tons/day, the pressing method is more economical. If your cottonseed oil production is more than 10 tons/day, the leaching method is a good choice.

The cottonseed oil production equipment used in the pressing method includes cottonseed pretreatment equipment, pre-press and press.

The cottonseed pretreatment equipment includes a magnetic separator, a vibrating screen, a specific gravity stone remover, a sheller, an embryo rolling machine and a steaming pan. After pretreatment, the impurities of cottonseed are cleaned up, and the moisture, temperature and internal structure are also adjusted to a proper pressing state, which improves the oil yield. It should be noted that the output of cottonseed oil is less than 10 tons/day, engineers suggest not to peel the shell, which will be more cost-effective. If the output is more than 10 tons/day, shelling is required, otherwise the grease loss will be great.

After pre-treatment, the cottonseed is squeezed twice with a pre-press and a press to obtain cottonseed oil. If you want to obtain high-quality cottonseed oil, we can provide you with cottonseed oil refining equipment for further processing of cottonseed oil.

At present, the oil industry in my country mainly adopts two production processes, one is the squeezing method, and the other is the leaching method. With the help of mechanical external force, the method of extracting oil by squeezing the grease out of the oil is called the squeezing method.

　　 The size of the pressure on the squeezed material and the depth of the squeezed oil. The squeezing method can be divided into one-time pressing and pre-pressing. One-time squeezing is also called full squeezing, which requires the squeezing process to extract as much oil as possible from the squeezed material, and the residual oil in the cake after squeezing is 3% to 5%. Pre-pressing only requires the pressing process to extract about 70% of the oil in the pressed material and 15% to 18% of the residual oil in the pressed cake. The pre-pressed cake is then subjected to solvent extraction to extract the oil.

　　 The raw embryos are usually steamed and fried before the oil is extracted, and the raw embryos are steamed and fried to mature embryos. The crushed crude oil contains a certain amount of cake crumbs, and the residue is removed before the oil is refined. Therefore, the typical pressing process includes steaming, squeezing, crude oil slag removal.

　　Cottonseed oil and refining process

　　 Pressed cottonseed oil: oil obtained by direct pressing of cottonseed. Leaching cottonseed oil: oil obtained from cottonseed through the leaching process. Genetically modified cottonseed oil: oil made from genetically modified cottonseed.

　　 Cottonseed crude oil: Cottonseed oil that cannot be directly eaten without any treatment.

　　 Finished cottonseed oil: Directly edible cottonseed oil that has been processed to meet the standard product oil quality indicators and hygiene requirements.


　　 cottonseed oil production process

　　1. Fried seeds

　　 Generally, put 1/4 to 1/3 of the capacity in the pot, and fry it evenly. After frying, the cottonseeds are flattened in the trough, and the hot steam is dissipated in the bucket with sticks, and it is easy to sieve and clean after being cold.

　　 2. Sieving

　　 Use manual sieve or fixed sieve to remove soil and impurities.

　　3. Grinding

　　 When grinding, the cutting material should be less, and it should be even and continuous

　　 cottonseed oil flow, the grinding speed is appropriately fast, so that the cottonseed is easy to break.

　　 4. Add water

　　 Sprinkle water along the ring groove of the roller. When grinding, sprinkle water while turning the seeds to make the billet evenly draught and the milling is consistent. Grind for about 20 minutes until the fine billet is not agglomerated.

　　 5. Steamed billets

　　Pour the dough into the steaming bucket and flatten it by hand to make the steaming bucket evenly ventilated and the temperature and moisture of the dough are consistent. The bottom of the steaming bucket is round like a shau-kei back, and it is evenly heated. The water level of the steamer should be the same. The distance between the bottom of the steaming bucket and the water surface should be more than 16 cm, and the fire should be even.

　　 6. Baobing

　　Bing cakes should be dispersed and packed quickly, packing flat and tight, and squeezing concentrated and fast. Single circle pancakes are about 2 cm thick after pressing. The time should be shortened as much as possible to prevent the heat loss in the blank.

　　 7. Squeeze

　　 When the pie is virgin, the pie is aligned, and the distance between the circle and the circle is adjusted to prevent the pie from being uneven. When sharpening, keep the oil flow out of line. When the oil line is broken, squeeze for another 2 hours before squeezing.

　　 8. Clarification and filtration

　　 There are many impurities in the crude oil squeezed out. It should be cooled quickly, and then filtered after standing for a period of time, so as not to deepen the color and increase the refining loss.


　　 cottonseed oil refining method

　　Cottonseed oil is also the main cooking oil. However, wool cotton oil contains gossypol (content about 1%), gum and wax (content varies depending on the amount of husk in oil-making cotton embryo), which is of poor quality and is not suitable for direct consumption. Its refining process is also more complicated.

　　 Coarse cotton refining process (continuous)

　　 lye soft water

　　↓ ↓

　　 Filter crude oil—→Preheat—→Oil-alkali ratio—→Mixed reaction—→Desoap—→wash—→dehydrate—→dry—→cotton clear oil

　　 ↓ ↓

　　 Soap Foot Wastewater

Operating conditions: the impurity content of the filtered crude oil is not more than 0.2%, the concentration of lye is 20-28°Bé, the excess alkali is 10%-25% of the theoretical alkali, the desoaping temperature is 70-95°C, the amount of drum rinse water added is 25～1001/h, oil inlet pressure 0.1～0.3 MPa, oil outlet back pressure 0.1～0.3 MPa, washing temperature 85～90℃, washing water addition amount is 10%～15% of oil, dehydration back pressure 0.15 MPa, the drying temperature is not lower than 90℃, the operating pressure is 4.0kPa, and the product oil filtration temperature is not higher than 70℃.

　　 refined edible oil refining process

　　 phosphoric acid lye soapstock lye

　　↓ ↓ ↑ ↓

　　Filter crude oil—→preheat—→mix—→oil-alkali ratio—→mix reaction—→desoap—→mix

　　↓

　　 Filtration←—Distillation deodorization←—Filtration←—Adsorption decolorization←—Dehydration←—Washing←—Desoaping

　　↓ ↓ ↓ ↑ ↓ ↑ ↓

　　 refined cooking oil, water vapor, waste clay, adsorbent, waste water, soft water, soap stock

　　Operation points: the operating conditions before alkali refining are the same as crude oil refining, the concentration of re-refining lye is 6-12°Bé, the addition amount is 1%-3% of the oil volume, the re-refining temperature is 70-90℃, and the oil back pressure is 0.15 MPa. The operating conditions of washing, decolorization and deodorization are similar to those of peanut oil refined edible oil. If degreasing is performed after deodorization, the grade of the refined oil is refined refrigerated table oil (salad oil).

The process flow after 　　 deodorization process is:

　　┌→ soft fat

　　 Deodorized cotton oil—→cooling and crystallization—→cultivating crystal—→filtering—┤

　　└→ Cold meal oil

　　The refined cottonseed oil can be eaten with confidence!

In addition to pretreatment equipment, the leaching method also requires leaching equipment and refining equipment. The leaching equipment extracts the oil in the pre-pressed cake, reducing the residual oil rate in the cake from 7% to less than 1%, reducing oil loss. The refining equipment includes degumming, deacidification, decolorization and deodorization sections. The purpose is to remove trace impurities in the crude oil, so that the composition, color and smell of cottonseed oil can meet the standards and can be sold on the market.

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