How to extract walnut oil Walnut oil press machine

China is one of the origin centers of Walnut in the world. It is a big walnut producing country in the world, with large planting area and output. Its export volume is second only to the United States, ranking second in the world.

Walnut oil content of up to 65% to 70%, the residence has the first of woody oil, the use of modern technology to extract its essence, which is walnut new generation of walnut oil. Walnut oil is a kind of natural fruit oil juice made from high-quality walnut and international advanced technology. In the international market, walnut oil is known as "Oriental olive oil", which is favored by consumers as well as olive oil.

Complete equipment of walnut oil peeling and cold pressing

Pressing oil is the traditional processing method in China's vast walnut producing areas. Jinan Yueheng machinery developed walnut shelling and peeling cold pressing technology on the basis of traditional walnut pressing technology, which can obtain high-quality cold pressed walnut oil and high protein walnut powder from pressed cake. The process is as follows

Technological process: Walnut raw material → cleaning → shelling → peeling → drying → crushing → conditioning → cold pressing → first pressing walnut oil

Process Description: the walnut is first transported to the vibrating cleaning screen to remove impurities, and then the metal impurities and stones are removed by magnetic separator and specific gravity stone remover.

After cleaning, the walnut was shelled, and the walnut kernel and shell were separated.

The walnut kernel is peeled by water machine, then separated by separator, and finally dried by dryer.

The dried walnut kernel is crushed by crusher, and the crushed walnut kernel is transferred to the cold press for cold pressing after conditioning.

The process is cold pressing, the residual oil is 13-20%, and the conditioning temperature can be increased. For hot pressing, the residual oil rate can be reduced to 6%, and the unique aroma of walnut can be maintained.

Main equipment: vibrating cleaning screen, magnetic separator, specific gravity stone remover, sheller, peeling machine, crusher, dryer, tempering pot, etc.

Main features: cold pressing technology, conditioning and pressing temperature controlled at 60-80 ℃, can better maintain protein. The quality of cold pressed crude oil is good and the acid value is & le; 0 (KOH) mg / g, peroxide value & le; 0 mmol / kg, color R / y < 2.5/25.

Walnut oil refining equipment

Process flow: crude oil → degumming → deacidification → decolorization → filtration → heating → deodorization → cooling → filtration → product oil

Process Description: after the crude oil is preheated, add hot brine to the oil for washing, separate the soaping water, and finish degumming after one or two times of the same washing. The degummed oil enters into the decolorization process, and the activated clay is added to decolorize in the decolorization tower, and then pumped into the blade filter for filtration. The filtrate is polished and then enters the next process. After the blade filter is dried, the waste clay is discharged through vibration. The decolorizing oil pump is pumped into the gas separator for vacuum deoxidation, and then the oil oil heat exchanger is pumped to preheat the deodorized oil for heat exchange. When the oil is heated to about 250 ℃, it enters the combined deacidification and deodorization tower for deacidification and deodorization under high vacuum, so as to remove the fatty acid, odor and other volatile substances in the oil to the maximum extent

Process features: physical refining technology is adopted to retain the nutrients in the oil to the maximum extent.

The extraction and refining process of walnut oil is as follows: the total amount of alkali can be determined according to the acid value of crude oil (the amount of alkali in this experiment is 0.1% of crude oil), and the stirring speed is 60R / min; Degumming water 2% - 6%, time 5-6h, vacuum drying, vacuum degree 700-730mmhg, temperature about 110 ℃, time 50min, adding activated carbon 0.5% - 2%. Decolorization at 110 ℃ for 10-20min, vacuum degree 720mmhg, deodorization at 190 ℃ for 3-5h.