Ginger oil extraction technology
Ginger has a large area of ​​cultivation in China and its total output is quite high. However, due to improper storage methods of fresh ginger, it causes a lot of waste. If ginger is processed into ginger oil, its economic benefits can be increased by 3 to 5 times. The use of distillation method to extract ginger oil is simple and the equipment used is not very demanding. The majority of township enterprises and more powerful rural private enterprises can use it. The following describes the principle of distillation ginger oil extraction and specific extraction process.
First, the extraction principle:
Using the volatile and water-insoluble properties of ginger oil, ginger oil is distilled using water vapor. After cooling and oil-water separation, ginger oil products are obtained.
Second, equipment:
Tunnel dryer (or oven), grinder, steamer, cooler, oil-water separator.
Third, the extraction process points:
1. Raw material pretreatment. Fresh ginger without worms, mildew, and sprouts was selected as a raw material. Roots were removed and cut into 4 mm to 5 mm thick ginger slices with a knife. Note that raw materials must not be rotted or deteriorated, otherwise it will affect the quality of ginger oil.
2. Drying. Bake ginger slices at 60°C-65°C for 6 hours to 8 hours to reduce the moisture content of fresh ginger slices to less than 12%. It can also be placed on the bamboo screen for 5 days to 6 days. Generally, 12.5 kilograms of dried ginger are made per 100 kilograms of fresh ginger slices.
3. Crush. The dried ginger pieces were pulverized with a pulverizer into rice-like ginger powder and passed through a 20-mesh sieve. Ginger powder can not be too thick, too thick to affect the oil; nor too fine, too fine water vapor is not easy to penetrate.
4. Distill, cool. Prepare the stainless steel steamer, place the steamer in the steamer, spread a layer of gauze on the rice dumpling, and loosely spread the ginger powder on the gauze. The surface of the ginger powder and the upper layer of rice dumplings should retain some space to facilitate the penetration of water vapor.
After installing the ginger powder, connect the distillation tube of the steamer to the cooler, pay attention to maintain the height difference between the inlet and outlet of the cooler, the import should be high, and the export should be low. This constitutes a set of distillation cooling equipment.
Under the steamer steam, so that the steam pressure to maintain 0.12Mpa-0.13Mpa. In this way, the steam passes through the ginger powder, the ginger oil in the ginger powder vaporizes due to the high temperature effect of the steam, and the water vapor enters the cooler from the distillation pipe, and the steam and vaporized ginger oil are cooled in the cooler to form an oil-water mixture.
5. Oil and water separation. The water-oil separator collects the oil-water mixture at the outlet of the cooler. After standing, the oil-water mixture is automatically separated. The upper layer is ginger oil and the lower layer is water. The use of a separator to remove the lower layer of water results in a ginger oil product.
The oil rate of this method is generally 100 kg ginger powder extractable ginger oil 3 kg-4 kg.
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