Where is the origin of rapeseed?

Rapeseed is a kind of rapeseed which can extract oil and has high application value. at present, it is being planted in many parts of our country, so where is the origin of rapeseed?

Where is the origin of rapeseed?

Spring sowing rapeseed is produced in Inner Mongolia, Qinghai, Xinjiang, Gansu and so on, among which Hailar region of Inner Mongolia is the most concentrated. Autumn and winter sowing rapeseed oil is produced in Jiangsu, Zhejiang, Anhui, Jiangxi, Hubei, Hunan, Chongqing, Yunnan, Sichuan, Guizhou and so on. Hubei is the largest production province, Sichuan is the second largest production province.

Second, how to extract oil from rapeseed?

1. Clean and dry rapeseed

If the soil, stems and leaves and other debris contained in rapeseed are not removed before entering the oil press, it will not only affect the quality of oil and cake, but also absorb part of the oil and reduce the oil yield. If the rapeseed contains sand, metal, hemp rope and other sundries, it will cause wear and tear of the parts, induce production accidents and affect the process effect. Therefore, in order to ensure the smooth progress of production, impurities must be removed as far as possible, a few rapeseed fruits with high water content, in order to peel convenient, drying treatment is also very necessary.

2. Heat treatment

Heat treatment is one of the most important processes in the process of oil extraction, including the wetting and heating of raw billet, which is called steaming billet or fried billet in production, and the billet after steaming and frying is called cooked billet. Raw billets that are pressed after heat treatment are called hot pressing, and those without heat treatment are called cold pressing. Rapeseed is mainly hot-pressed. The effect of heat treatment has a direct impact on the smooth progress of the whole oil production process, the oil yield and the quality of oil products and cakes.

3. Press

The round press bar of the press has a zigzag curve and conical surface. When the rapeseed is pressed, the volume of the press screw and the inner wall space of the press cage is constantly changing due to the push and extrusion of the press snail. The inner wall of the press cage is serrated, where the billet is pressed and relaxed alternately, and the structure of the billet is constantly adjusted to get uniform turning. So that the unsqueezed oil or the billet with less oil is more likely to be fully squeezed.

Generally speaking, there are many producing areas of rapeseed, which are planted in most parts of China, among which Hubei and Sichuan are the largest producing provinces in China.