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Microwave vacuum-hot air sectional type drying method for pseudo-ginseng

A microwave vacuum drying and microwave vacuum technology is applied in the direction of drying solid materials with heating, drying solid materials without heating, drying solid materials, etc. Loss of active ingredients, fast drying effect

Inactive Publication Date: 2021-01-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Analyze the reasons for the above situation: using hot air or oven drying methods, the saponin is likely to volatilize due to high temperature or long drying time; microwave drying is prone to problems such as difficult control of the internal temperature of the material and poor drying uniformity
[0005] The active ingredients of total saponins in Panax notoginseng tend to volatilize during long-term drying, thereby reducing the content of its medicinal ingredients. At the same time, microwave drying is prone to poor drying uniformity during drying.

Method used

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  • Microwave vacuum-hot air sectional type drying method for pseudo-ginseng

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of notoginseng microwave vacuum-hot air section drying method, comprises the following steps:

[0028] (1) Preparatory work for Sanqi drying: select newly harvested three-year-old Panax notoginseng, wash it clean, and drain the surface water, classify Sanqi according to main root, notch, lateral root and fibrous root, and select the main root of Panax notoginseng .

[0029] (2) Weigh 30±1g of the main root, cut it into thin slices, put it in an oven with a set temperature of 80°C, dry it for 24 hours until it is completely dry, take out the Panax notoginseng thin slice and weigh it again, and calculate the moisture content on a wet basis 61.24%.

[0030] (3) Microwave vacuum drying: Weigh 100 ± 0.5g fresh Panax notoginseng taproot, put it on the material tray of the dryer, insert the fluorescent optical fiber temperature sensor probe into a Panax notoginseng taproot, close the dryer door; adjust the intake valve, set Set the absolute vacuum degree to 5kPa; adju...

Embodiment 2

[0035] A method for notoginseng microwave vacuum-hot air segmental drying, comprising the following steps:

[0036] Step (1) is identical with embodiment 1.

[0037]Step (2) is the same as in Example 1, and the calculated moisture content on a wet basis is 61.24%.

[0038] Step (3) is identical with embodiment 1, and microwave power is 100W, and this moment power density is 1W / g, and upper and lower limit of temperature value is 55,45 ℃, and absolute vacuum degree is 5kPa, and conversion wet basis moisture content is 30%.

[0039] (4) Weigh the main root of Panax notoginseng, and calculate the moisture content of the wet basis. When the moisture content of the main root of Panax notoginseng drops to 30±0.5% of the converted wet basis, the drying time is 10.3 hours. Turn off the microwave vacuum dryer, take out the main root of Panax notoginseng, and put it in an oven to continue drying.

[0040] (5) Hot air drying: set the oven temperature at 55°C and the wind speed at 0.5m / ...

Embodiment 3

[0042] A method for microwave vacuum-hot air segmental drying of Panax notoginseng main root, comprising the following steps:

[0043] Step (1) is identical with embodiment 1.

[0044] Step (2) is the same as in Example 1, and the calculated moisture content on a wet basis is 61.24%.

[0045] Step (3) is identical with embodiment 1, microwave power 100W, and this moment power density is 1W / g, and upper and lower limit of temperature value is 50, 40 ℃, and absolute vacuum is 1kPa, and conversion moisture content is 30%.

[0046] (4) Take the weight of the main root of Panax notoginseng, and calculate the moisture content of the wet basis. When the moisture content of the main root of Panax notoginseng drops to 30±0.5% of the converted wet basis, the drying time is 6.5 hours. Turn off the microwave vacuum dryer, take out the main root of Panax notoginseng, and put it in an oven to continue drying.

[0047] (5) Hot air drying: set the oven temperature at 55°C and the wind speed...

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Abstract

The invention relates to a microwave vacuum-hot air sectional type drying method for pseudo-ginseng, and belongs to the technical field of pseudo-ginseng drying. The method comprises the following steps of: 1) carrying out pseudo-ginseng drying early-stage preparation work: storing, cleaning and classifying; 2) determining the initial wet basis moisture content of pseudo-ginseng materials; (3) setting drying conditions of a microwave vacuum dryer, and drying the pseudo-ginseng similar materials by adopting an intermittent drying method under the conditions, so that the wet basis moisture content of the pseudo-ginseng similar materials is reduced to the converted wet basis moisture content; and 4) drying the pseudo-ginseng similar materials obtained in the step 3) again by adopting a hot air drying method, so that the wet basis moisture content of the pseudo-ginseng similar materials is reduced to the final safe wet basis moisture content; Microwave vacuum-hot air sectional type combined drying is adopted, the pseudo-ginseng drying time is effectively shortened, the drying rate is increased, and the dried pseudo-ginseng finished product is high in saponin content, safe and sanitary.

Description

technical field [0001] The invention belongs to the technical field of notoginseng drying, and in particular relates to a notoginseng microwave vacuum-hot air segmental drying method. Background technique [0002] Panax notoginseng is one of the traditional precious Chinese medicinal materials in my country, and it is also the largest variety of traditional Chinese medicine in my country. Yunnan is the origin and main producing area of ​​Panax notoginseng. More than 90% of Panax notoginseng in China is produced in Yunnan. The effects of notoginseng include analgesia, anti-anemia, prevention of coronary heart disease, arteriosclerosis, hypertension, angina pectoris and other diseases, and can also enhance the immune function of the body and delay aging. [0003] Because in actual production, the drying of fresh Panax notoginseng is still mainly based on drying. According to the traditional craft, the drying of Panax notoginseng is generally to dry together with mud and soil...

Claims

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Application Information

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IPC IPC(8): F26B5/04F26B3/347F26B21/10F26B25/18
CPCF26B5/04F26B3/347F26B21/10F26B25/18
Inventor 张付杰辛立东李丽霞周杰朱银龙陶欢
Owner KUNMING UNIV OF SCI & TECH
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