Novel method for drying fresh dendrobium officinale

A Dendrobium candidum drying technology, which is applied in the direction of drying solid materials, drying solid materials without heating, drying, etc., can solve the problems of damaging product components, affecting, and damaging consumers' rights and interests, and achieves easy-to-eat, easy-to-preserve, recognizable effect

Inactive Publication Date: 2013-04-17
HANGZHOU JIANGNANCHUNTANG BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Dendrobium officinale in my country is still mainly dried by hot air at atmospheric pressure. During the heat treatment process, some product components will be destroyed. Because heat treatment will change the shape of Dendrobiu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1: Select 15cm-20cm long whole rooted Dendrobium candidum and wash it with clean water to wash away the soil and other impurities on the surface, drain the water, cut into strips (about 1cm), and place it in 100℃ heat Soak in water for about 2 minutes, take it out immediately, and immerse it in cold water to quickly cool to room temperature. Dendrobium officinale is drained after cooling, and the filling thickness is controlled at about 10mm. After loading the raw materials, freeze them in the refrigerator until the center temperature is -20°C, and the pre-freezing time is about 2h. When they are dried, they are put into the drying chamber of the lyophilizer under low pressure and then further cooled down and vacuum freeze-dried.

[0021] The vacuum freeze-drying parameters are: the initial pressure is 150Pa, after entering the analysis section, the pressure is set to 100Pa, the thickness of the material layer is 10mm, and the drying time is 30h. After vacuum free...

Example Embodiment

[0022] Example 2: Wash Dendrobium officinale with clean water to remove the dirt and other impurities on the surface. After the water is drained, it is blanched in hot water at 100°C for about 2 minutes, taken out immediately, and then immersed in cold water for rapid cooling To room temperature. Dendrobium officinale is drained after cooling, and the filling thickness is controlled at about 10mm. After loading the raw materials on a plate, freeze them in the refrigerator to a central temperature of -20°C, and the pre-freezing time is about 2 hours. When they are dried, they are put into the drying chamber of the freeze dryer under low pressure and then further cooled down, and microwave vacuum freeze-drying.

[0023] Microwave vacuum freeze-drying parameters are: initial pressure 150Pa, microwave power 800W, after entering the analysis section, the pressure is set to 100Pa, the microwave power is set to 600W, the material layer thickness is 10mm, and the drying time is 5.6h.

Example Embodiment

[0024] Example 3: Dendrobium officinale was washed with clean water to remove the dirt and other impurities on the surface. After the water was drained, it was blanched in hot water at 90°C for about 1 minute, taken out immediately, and then immersed in cold water for rapid cooling To room temperature. Dendrobium officinale is drained after cooling, and the filling thickness is controlled at about 10mm. After loading the raw materials, freeze them in the refrigerator to a central temperature of -25°C, and the pre-freezing time is about 1 h. When they are dried, they are put into the drying chamber of the freeze dryer under low pressure and then further cooled down, and microwave vacuum freeze-drying.

[0025] The parameters of microwave vacuum freeze-drying are: initial pressure 120Pa, microwave power 650W, after entering the analysis section, the pressure is set to 80Pa, the microwave power is set to 450W, the thickness of the material layer is 8mm, and the drying time is 6.5h. ...

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Abstract

The invention relates to a novel method for drying fresh dendrobium officinale. The method comprises the following steps: 1) clearing raw materials, 2) blanching and cooling: placing the cut dendrobium officinale in hot water of 70-100 DEG C, scalding for 1-3min, soaking in cold water, and rapidly cooling to the room temperature, 3) draining and conducting tray loading: controlling the loading thickness to be about 5-15mm, 4) prefreezing: freezing to a central temperature between subzero 20 DEG C and subzero 25 DEG C for 2h after loading the raw materials in the tray, and 5) conducting vacuum freeze drying or microwave vacuum freeze drying: cooling a cold trap to be between subzero 20 DEG C and subzero 60 DEG C, placing the materials in a drying bin, conducting vacuum-pumping, cooling the materials to be between subzero 20 DEG C and subzero 60 DEG C after half an hour, adopting a multistage heating method, controlling the temperature of the raw materials at a sublimation section to be between subzero 15 DEG C and subzero 30 DEG C, and controlling the temperature of the raw materials at an analysis section at 30-60 DEG C. The method has the benefits that the shape, color and active ingredients of the fresh dendrobium officinale are preserved to the greatest extent, and the fresh dendrobium officinale is easy to store, eat and distinguish.

Description

technical field [0001] The invention relates to the field of dendrobium candidum, in particular to a method for drying fresh materials of dendrobium candidum. Background technique [0002] Dendrobium candidum has unique medicinal value. The "Shen Nong's Materia Medica" in the Qin and Han Dynasties records that Dendrobium candidum "mainly injures, eliminates numbness, lowers qi, nourishes five viscera and loses fatigue, strengthens yin, and thickens the stomach after long-term use"; it was written in a book The Taoist medical classic "Tao Cang" more than a thousand years ago listed Dendrobium candidum as the first of the "Nine Chinese Immortal Grasses"; Stomach qi, long muscles, intelligence and shock, light body and prolong life; folks call it "life-saving fairy grass". The active ingredient of Dendrobium officinale is mainly polysaccharide of Dendrobium candidum. Modern pharmacological research shows that polysaccharide of Dendrobium officinale also has anti-tumor , anti-a...

Claims

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Application Information

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IPC IPC(8): A61K36/8984A61P1/14F26B5/06A61K125/00
Inventor 黄祥勇
Owner HANGZHOU JIANGNANCHUNTANG BIOLOGICAL TECH
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