阅读说明：本技术 一种红外真空-热风组合干燥白芷的方法 (Method for drying radix angelicae through infrared vacuum-hot air combination ) 是由 姚静 于 2020-07-09 设计创作，主要内容包括：本发明公开了一种红外真空-热风组合干燥白芷的方法,将白芷杀菌消毒后,进行红外线真空干燥和热风干燥。本发明提供的白芷干燥方法,简便经济、环保,具有杀菌、防霉、干燥时间短、无残留毒物、成本低的优点,干燥后的白芷品质好,对原料药材本身的活性成分影响小,具有广阔的应用前景。(The invention discloses a method for drying angelica dahurica by combining infrared vacuum and hot air. The method for drying the radix angelicae dahuricae is simple, convenient, economical and environment-friendly, has the advantages of sterilization, mildew prevention, short drying time, no residual poison and low cost, and the dried radix angelicae dahuricae has good quality, has little influence on active ingredients of raw medicinal materials and has wide application prospect.)

1. A method for drying radix angelicae through infrared vacuum-hot air combination is characterized in that the radix angelicae is subjected to infrared vacuum drying and hot air drying.

2. The drying method according to claim 1, wherein the infrared wavelength is a medium-short wavelength of 0.8 to 3 μm.

3. The drying method according to claim 1, wherein the conditions of the infrared vacuum drying include:

the radiation distance is 110-130 mm, the vacuum degree is 0.048-0.059 MPa, the drying time is 40-45 h, and the temperature is 45-50 ℃.

4. The drying method according to claim 1, wherein the conditions of the hot air drying include: the drying time is 1-1.5 h, and the temperature is 45-60 ℃.

5. The drying method according to any one of claims 1 to 4, wherein the radix Angelicae Dahuricae is sterilized before drying, and further, the sterilizing time is 15 to 25 min.

6. Drying method according to claim 5, characterised in that the sterilisation and disinfection is effected by UV light.

7. The drying method according to claim 5, wherein the radix Angelicae Dahuricae is cut into slices with a thickness of 2-3.5 mm before sterilization.

8. The drying method according to claim 1, wherein the moisture content of the radix angelicae before the hot air drying is controlled to be 20-35%.

9. A dried radix Angelicae Dahuricae product prepared by the method of any one of claims 1 to 8.

10. Use of the method of any one of claims 1 to 8 in food processing or traditional Chinese medicine processing.

Technical Field

The invention belongs to the technical field of drying of traditional Chinese medicinal materials, and particularly relates to a method for drying radix angelicae through infrared vacuum-hot air combination.

Background

Radix Angelicae Dahuricae is the dry root of Umbelliferae plant radix Angelicae Dahuricae or radix Angelicae Dahuricae, and is named as radix Angelicae Dahuricae because the primary root is radix Angelicae Dahuricae and is white in color. It is warm in nature, fragrant in smell, pungent and slightly bitter in taste, enters stomach, colon and lung channels, has the efficacies of dispelling wind and eliminating dampness, dredging orifices and easing pain, reducing swelling and expelling pus and the like, and plays an important role in traditional Chinese medicinal materials. Because the radix angelicae is strong in fragrance and rich in starch which is easy to be damaged by worms, damp, mildewed and changed in taste, drying is one of the important links of the primary processing of the radix angelicae.

At present, the angelica dahurica medicinal material is usually dried in the air, dried in the sun, dried by sulfuring, dried by hot air and the like, and the traditional drying method of drying in the air and the hot air has long drying time, which is easy to cause the deterioration of the black core of the angelica dahurica; the sulfur-curing drying causes great pollution to the environment, and can also reduce the content of effective components of the angelica dahurica and reduce the drug effect, thereby influencing the quality of the angelica dahurica.

According to the current processing condition of the radix angelicae, a simple, convenient and economic drying method with short drying time and good quality is urgently needed.

Disclosure of Invention

The invention mainly solves the technical problem of providing the infrared vacuum-hot air combined drying method for the angelica dahurica, which is simple, convenient, economic and environment-friendly, and has the advantages of sterilization, mildew prevention, short drying time, no residual toxic substances and low cost, and the dried angelica dahurica has good quality and small influence on the active ingredients of the raw medicinal materials.

In order to solve the problems, the invention adopts the following technical scheme:

a method for drying radix angelicae through infrared vacuum-hot air combination is characterized in that the radix angelicae is subjected to infrared vacuum drying and hot air drying.

In the infrared vacuum drying process, heated molecules in the radix angelicae absorb infrared rays with specific frequency and wavelength, the molecules in the radix angelicae are heated through vibration and friction, the thermodynamic gradient of the dried radix angelicae is high inside and low outside and is matched with the moisture content release gradient, and the heat transfer direction and the mass transfer direction are consistent, so that the drying efficiency can be effectively improved.

The invention combines the infrared vacuum drying technology and the hot air drying technology, and the temperature inside and on the surface of the angelica dahurica is rapidly increased under the auxiliary action of the circulating hot air through radiation and penetration and heat conduction in the process, so that the heating and drying are completed in a very short time.

Further, the infrared wavelength is a medium-short wavelength of 0.8-3 μm.

Further, the infrared vacuum drying conditions include:

the radiation distance is 110-130 mm, the vacuum degree is 0.048-0.059 MPa, the drying time is 40-45 h, and the temperature is 45-50 ℃.

Further, the hot air drying conditions include: the drying time is 1-1.5 h, and the temperature is 45-60 ℃.

According to the drying method, the radix angelicae dahuricae needs to be sterilized and disinfected before being dried, and further, the sterilizing and disinfecting time is 15-25 min.

Further, the sterilization and disinfection are realized by ultraviolet rays.

Furthermore, the radix angelicae dahuricae needs to be cut into slices with the thickness of 2-3.5 mm before sterilization and disinfection.

Further, the water content of the angelica dahurica before the hot air drying is controlled to be 20-35%.

The invention also provides a dried angelica dahurica product prepared by the method.

The method of the invention is applied to food processing or Chinese medicinal material processing.

The invention has the following beneficial effects:

(1) the invention shortens the working time, improves the production efficiency, and has the advantages of high radiance, small heat loss, sterilization, mould prevention, short drying time, low cost, simplicity, convenience and environmental protection.

(2) The product of the invention is not added with additives, is safe, has no residual poison, has little influence on the active ingredients of the raw medicinal materials, has good quality, is beneficial to popularization and application, and has wide market prospect.

Detailed Description

The technical solutions of the present invention are described below clearly and completely with reference to the following embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.