Microwave vacuum freeze-drying method for Dendrobium officinale

A technology of Dendrobium candidum and drying method, which is applied in the direction of drying solid materials, types of dried products, and drying solid materials without heating, etc., can solve the effects of effective physiologically active active ingredients, uneven heating of Dendrobium candidum, deterioration of sensory indicators, etc. problems, achieve the effects of shortening the sublimation time, improving storage stability, and fast drying speed

Inactive Publication Date: 2016-06-15
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fresh product of Dendrobium officinale has a short storage time, and although it can prolong the storage time after drying, the sensory indicators become worse, and most importantly, the effective physiologically active ingredients are also affected, resulting in a decline in its efficacy
At present, the existing patent number...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for microwave vacuum freeze-drying of dendrobium officinale comprises the following steps:

[0019] (1) Pretreatment: wash Dendrobium officinale and drain the surface moisture, then fumigate with steam for 5min and then cool to room temperature;

[0020] (2) Pre-freezing and freezing: putting the pretreated Dendrobium officinale into a freezer with a storage temperature of -36°C to quickly cool down the Dendrobium candidum to the storage temperature within 30 minutes, and then freeze at the constant temperature for 3 hours at the storage temperature;

[0021] (3) Sublimation: place the frozen Dendrobium candidum in a vacuum chamber with a temperature of -45°C and a vacuum of 30Pa, and turn on the microwave generator to sublimate for 1 hour at a modulation power of 250W / Kg;

[0022] (4) Desorption drying: dry for 3 hours at a temperature of 40°C and a vacuum of 0.3mPa;

[0023] (5) Post-processing: the dried Dendrobium candidum is graded, packaged and sealed. ...

Embodiment 2

[0025] A method for microwave vacuum freeze-drying of dendrobium officinale comprises the following steps:

[0026] (1) Pretreatment: wash Dendrobium officinale and drain the surface moisture, then fumigate with steam for 3 minutes and then cool to room temperature;

[0027] (2) Pre-freezing and freezing: putting the pretreated Dendrobium candidum into a freezer with a storage temperature of -32°C to quickly cool down the Dendrobium candidum to the storage temperature within 30 minutes, and then freeze at the constant temperature for 3 hours at the storage temperature;

[0028] (3) Sublimation: place frozen Dendrobium candidum in a vacuum chamber with a temperature of -40°C and a vacuum of 13Pa, and turn on the microwave generator to sublimate for 2 hours at a modulation power of 200W / Kg;

[0029] (4) Desorption drying: dry for 3 hours at a temperature of 30°C and a vacuum of 0.15mPa;

[0030] (5) Post-processing: the dried Dendrobium candidum is graded, packaged and sealed. ...

Embodiment 3

[0032] A method for microwave vacuum freeze-drying of dendrobium officinale comprises the following steps:

[0033] (1) Pretreatment: wash Dendrobium officinale and drain the surface moisture, then fumigate with steam for 4min and then cool to room temperature;

[0034] (2) Pre-freezing and freezing: putting the pretreated Dendrobium officinale into a freezer with a storage temperature of -35°C to quickly cool down the Dendrobium candidum to the storage temperature within 30 minutes, and then freeze at the constant temperature for 3 hours at the storage temperature;

[0035] (3) Sublimation: place the frozen Dendrobium officinale in a vacuum chamber with a temperature of -42°C and a vacuum of 25Pa, and turn on the microwave generator to sublimate for 1 to 2 hours at a modulation power of 220W / Kg;

[0036] (4) Desorption drying: dry for 2 hours at a temperature of 35°C and a vacuum of 0.2mPa;

[0037] (5) Post-processing: the dried Dendrobium candidum is graded, packaged and s...

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PUM

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Abstract

The invention discloses a microwave vacuum freeze-drying method of dendrobium candidum, which comprises the following steps: (1) pretreatment: washing the dendrobium candidum, draining the surface moisture, fumigation with steam for 3-5 minutes, and cooling to room temperature; (2) Pre-freezing and freezing: putting the pretreated Dendrobium candidum into a freezer with a storage temperature of -32~-36°C to quickly cool down the Dendrobium candidum to the storage temperature within 30 minutes, and then freeze at the constant temperature for 3 hours at the storage temperature; ( 3) Sublimation: put the frozen Dendrobium candidum in a vacuum chamber with a temperature of -40~-45°C and a vacuum degree of 13-30Pa, and turn on the microwave generator to sublimate at a modulation power of 200~250W/Kg for 1~2h (4) Post-processing: the dried Dendrobium candidum is classified, packaged and sealed. The drying method of the dendrobium candidum of the present invention has the advantages of fast drying speed, short time, low energy consumption, maximum retention of active substances of the dendrobium candidum, sufficient drying and the like.

Description

technical field [0001] The invention relates to a processing method of Chinese herbal medicine, in particular to a microwave vacuum freeze-drying method of dendrobium officinale. Background technique [0002] Dendrobium candidum, also known as black knot grass, belongs to the aerial orchidaceae herb. It is called "the giant panda in the medicine world" in the international medicinal plant circle, and is called "life-saving fairy grass" by the people. According to medical records, Dendrobium candidum has medicinal value such as nourishing yin and body, strengthening the body, nourishing the spleen and stomach, protecting the liver and gallbladder, strengthening muscles and bones, promoting circulation, lowering blood sugar, inhibiting tumors, brightening eyes, nourishing skin, and prolonging life, such as: "Chinese Pharmacy Dictionary" said that it "specializes in nourishing the qi and liquid of the lung and stomach, the qi and liquid are prosperous, and the kidney water is s...

Claims

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Application Information

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IPC IPC(8): F26B1/00F26B5/06
CPCF26B1/00F26B5/048F26B2200/00
Inventor 黎茜
Owner GUANGXI UNIV
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