What is the production process of the oil press? Oil extraction process

The production process of the oil press can be divided into pretreatment section, pressing section and refining section according to the section.

The main process of the pretreatment section is to clean, peel, steam, crush, screen and other operations of oil crops.

The main process of the crushing section is the extraction of oil from oil crops.

The main process of the refining section is to further refine the pressed oil to make it meet the national standard edible oil standard.

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.

Modern oil press process.

Now the oil press due to the perfect power, pressure and temperature conditions, so it is very easy and convenient to work, first screen the raw materials to remove impurities, and then the raw materials are broken and added about 7-8% of water to soften, into the steamer to steam to about 115 degrees before pressing. Oil extraction is divided into cold pressing and hot pressing, in order to improve the oil yield and the quality of the oil, generally hot pressing. The two process flows are as follows:

Cold pressing: rapeseed - screening - squeezing embryo - pressing the rapeseed first screened to remove impurities, and then check the water content of the rapeseed, no testing equipment can be detected by the soil method: squeeze the rapeseed with a fingernail, if there is a sound, and divide it into two pieces, or there is oil squeezed out is the most suitable, if it is too dry, if it is too wet.

If it is too dry, add water, stop less, and go directly to the oil press for pressing. Squeeze twice on one side.

Hot pressing: raw materials - screening - squeezing embryos - steaming and frying - pressing the rapeseed to screen and remove impurities, and then enter the rolling machine to roll the embryo, after rolling the embryo into the steaming and frying pan for steaming and frying, in the process of steaming and frying, add 2-3% water in the pot, and wait for the fried seeds to reach brown yellow, the temperature of 110 degrees -120 degrees is the most suitable, before it can be pressed.

The pressing method of peanut kernels: peanut kernels can be hot and cold pressed, mainly hot pressed (the effect of cold pressing is not as good as hot pressing). When hot pressing, the peanut kernels are crushed or rolled first, and then placed in the steamer for steaming for an hour, the temperature reaches about 120 degrees, and the water content is about 3%, and when the temperature of the oil press reaches 85 degrees, normal pressing begins.

If there is no steamer, you can also put the peanuts into the wok and stir-fry. Crush the peanut kernels first, gradually increase the water by about 7-8%, and fry until dark yellow.

Sunflower seeds as an example:

1. Production process of sunflower seed hot pressing equipment:

Sunflower seeds, hulling, shell kernel separation, steaming, frying, oil pressing, filtration, hot pressing crude oil, going to the refining workshop.

Second, the production process of sunflower seed cold pressing oil equipment:

Sunflower seeds, hulling, shell kernel separation, oil pressing, filtration, cold pressed oil, going to the refining plant.

Third, the process of pre-pressing leaching:

Pre-pressing process: sunflower seeds, cleaning, shelling, shell kernel separation, embryo pressing, steaming, frying, pre-pressing, crude oil.

Leaching process:

Solvent Solvent**.

Sunflower Seed Cake Leacher Mixed Oil Treatment Crude Oil.

Solvent** Wet meal evaporation Finished meal.

The crude oil refining process is the same:

Crude oil, hydration and degumming, alkali refining and deacidification, adsorption and decolorization, high temperature deodorization, winter dewaxing (optional) Refined oil.

The grease seeds are packed in a mesh bag and squeezed.

Oil extraction refers to a process in which oil seeds such as peanuts, soybeans, rapeseeds, sesame seeds, etc., which are rich in oil, are squeezed out of oil seeds with the help of external force extrusion and crushing.

Production process and precautions.

1. Prepare a mesh cloth and a clean container for oil; It is best to choose white cloth and disinfect it;

2. Select some full-grained oil seeds; If there is a need to peel the shell, it should be peeled;

3. Put the selected oil seeds in the pot for frying, generally only fry at about 80 degrees, fry until 8 mature, and then get out of the pot, and after the seed temperature drops to room temperature, the seeds will be chopped in advance;

4. Put the chopped oil seeds in a mesh cloth bag, seal the bag mouth, and then crack the oil seeds in the bag by squeezing the real bag, at this time, there will be oil flowing out, and the oil flowing out of the bag will be filled with a clean container, so that the simple oil extraction equipment will be basically completed.

The smoke point of the oil squeezed by themselves is relatively low, which belongs to crude oil, which is a big defect compared to the oil (refined oil) sold on the market, and there are hidden dangers of safety and health, especially aflatoxin with a high carcinogenic rate.

The question is too vague, are you referring to a household oil press? I can only tell you how our oil press works. In fact, it is not recommended that you use a household oil press, the first operation is improper, it is better to take peanuts or soybeans directly to the oil mill to process the oil to eat hygienic and healthy, the oil brother oil press will answer for you.

The oil extraction technology of the oil press is mainly divided into the following steps:1Breaking the suspicion and calling for smashing:

The oil is crushed, so that the grease in the oil is easier to squeeze out. Commonly used methods include grinding, crushing, cutting, etc. 2.

Drying: The crushed oil is dried in Qin Bikai to evaporate the excess water, so as to ensure the quality of the oil squeezed. 3.

Rice bran removal: Rice bran refers to the cortex and residual yeast in the oil, which can affect the amount of oil and fat. The removal of rice bran can be achieved by methods such as screening and cleaning.

4.Oil extraction: The prepared oil is put into the oil press, and the oil is separated from the oil by heating and pressing.

The separated oil is called virgin oil. 5.Refining:

Virgin oil contains impurities and moisture and needs to be refined, including processes such as removing impurities, deodorizing, and decolorizing. The end result is refined oil. It should be noted that in the process of oil extraction, it is necessary to ensure the quality of the oil, the cleanliness of the oil press and the environmental hygiene of the processing to ensure the quality and purity of the oil after oil extraction.

1. The use of knowledge is introduced as follows: inspection and debugging.

1) Before the oil pump test, add clean mechanical oil or vegetable oil to the oil tank, and press the handle up and down to see if the piston of the oil press rises. If the piston does not rise or the handle does not press effortlessly, check the valves of the tank and remove air from the lines.

2) carry out the pressure test of the whole machine, the pressure used in the test is 1 25 times of the working pressure, check the piston stretched out to the maximum working stroke, stabilize the pressure for 15 minutes, and the pressure gauge reading drop value shall not exceed 4 of the test pressure; All oil circuits should be free of leakage; After all the pressure is removed, the pressure gauge pointer returns to the "0" position, the parts should be undamaged, the tie rod must not be significantly deformed, and the moving parts should not be stuck.

3) Conduct a reliability test on the safety valve, adjust the safety valve to the working pressure (upper left +5, lower left +1) MPA, test 5 times continuously, the needle valve opens and closes sensitively, and the pressure gauge reading should not be lower than the rated working pressure after each valve jump.

2. Use the operation.

1) According to different oils, grasp the pressing temperature and water content of the cake blank.

2) When pressing, reduce the lower top plate to the lowest position, loosen the movable tie rod nut, pull off the two movable pins, and rotate the movable tie rod on one side. After the cake is loaded into the press chamber in turn, the movable pull rod is turned back to the original position and fixed, and the oil is pre-pressed until the oil is seen, and then the piston is returned, and the remaining cake is loaded for formal pressing (the general hydraulic oil press can load 20 pieces of cake).

3) When pressing, the handle should be pressed lightly, and the force should be even, and the force should not be too violent, otherwise, accidents will easily occur.

4) Press the oil with high oil content (such as peanut kernels, rapeseed), use a low-pressure pump to work for the first time, and switch to a high-pressure pump after the oil is produced.

5) If it is found that the pointer of the pressure gauge is less than zero, it should be calibrated, repaired or replaced in time.

6) Open the oil return valve, the oil will automatically flow back to the oil tank, and the piston will automatically fall, and it can be unloaded.

3. Maintenance and repair.

1) The pressure oil in the oil pump should be filtered, the concentration should not be too large, it is best to use rapeseed oil, soybean oil and peanut oil, etc., and it is forbidden to use gasoline, kerosene and other flammable fuel materials.

2) The oil tank should be kept clean, and the oil tank should be cleaned every 3 months or so, and the oil should be replaced with new oil, or the oil in the tank should be taken out and filtered before use. The impurities in the oil will wear out the oil pump and cause the oil circuit to be blocked, which will affect the work of the oil press.

3) The connecting pin shaft between the handle and the oil pump should be lubricated frequently to reduce wear.

4) The oil press should be installed indoors to avoid rust and cooking oil pollution caused by wind and rain in the open air.

5) When parked for a long time, the machine should be wiped clean and oiled.

1. Before using the oil press, you must read the instruction manual carefully and be familiar with the performance characteristics and operation methods of the machine.

2. Before starting, a comprehensive inspection must be carried out, the fasteners shall not be loose, the handle shall rotate flexibly, the pulley shall be rotated by hand, the running parts shall be normal, and there shall be no abnormal sound, and then 30 oil shall be added to the reducer.

3. Loosen the lock nut, turn the adjustment screw counterclockwise (the adjustment handle rotates counterclockwise, the cake gap narrows, the adjustment handle rotates clockwise, and the cake gap widens), so that the cone of the screw is pressed against the cone of the cake ring, and then the adjustment screw is screwed clockwise (3-5 turns), and then the nut is tightened and ready to start.

4. The machine is connected to the three-phase four-wire power supply, after the power supply is turned on, the spindle should be rotated counterclockwise, no matter what the situation, the machine must have a good grounding device, otherwise it can not be turned on.

5. Adjust the temperature controller, adjust to the required temperature of 120 -180 (according to the oil), turn on the heating switch to the heating position of the main engine, heat up the machine, then the green light on the temperature controller is on, the red light is off, when the temperature of the machine rises to the set temperature, and the red light is on and the green light is off, the temperature of the machine is automatically controlled and maintained at the set temperature, when the temperature is low in winter, the heating switch is turned on to the whole heating position of the main engine, so that the temperature of the oil pan rises, so that the oil is easy to stay.

6. Press the button of the main motor (turn on the switch of the main engine to the correct position), and the main engine will start to run, and the rotation direction should be counterclockwise.

7. After the installation of the new oil press, 4-8 hours of grinding, the method is to use the cake that has been squeezed dry oil to feed slowly from the hopper, and repeatedly squeeze back to polish the squeezing chamber. If the feeding is too violent, there is an abnormal sound in the pressing chamber or the screw shaft is stuck, it should be stopped immediately to eliminate the obstruction, or reassemble it before starting the grinding, and it is strictly forbidden to forcibly tow the truck.

8. When the oil is pressed normally, the feeding must be kept even, and the material must not be too much or too little or the material is idle. At this time, the load of the machine is normal, the operation is stable, and the sound is rhythmic. The cake is smooth, the low-pressure section is basically no slag, and the high-pressure section has a small amount of oil residue, but the proportion of the slag in the oil is not more than 10%, and the temperature in the squeezing chamber can reach 150-200.

Squeeze out the hot cake and spread it out in time, don't rush to pile or ship, otherwise there will be a natural phenomenon. When the continuous working time is long and the machine temperature is too high, cooling measures such as electric fan blowing should be taken.

9. When the pressed oil flows into the oil filter, press the vacuum pump button, the vacuum pump starts to run, the air in the oil filter is pumped out, the oil filter barrel of the oil press is formed internal pressure, the oil above is naturally pumped into the oil filter, and the oil residue is isolated on the filter cloth, after the pressing is completed, the oil is pumped, open the valve on the oil filter, stop the operation of the vacuum pump, the dry residue is formed on the filter cloth, scrape off with a scraper, and the bottom valve of the pure oil filter in the oil filter can be released.

10. Shutdown. Before stopping, stop feeding, then put in a small amount of cake crumbs, wait for the remaining material in the press chamber to be exhausted, and the cake outlet will no longer produce cake before it can be stopped. After the shutdown, the adjusting screw will be rotated clockwise for 1-3 turns, and the power supply will be disconnected.