Microwave vacuum freeze-drying method for rhizoma gastrodiae
A technology of microwave vacuum and drying method, which is applied in the directions of drying solid materials, heating to dry solid materials, and non-heating to dry solid materials. Achieve the effects of freeze-drying energy consumption and cost reduction, avoiding oxidation of active ingredients, and not destroying the appearance and color
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Embodiment 1
[0031] A kind of Gastrodia elata microwave vacuum freeze-drying method, comprises the steps:
[0032] 1) Wash the fresh Gastrodia elata with water and drain;
[0033] 2) Put the Gastrodia elata obtained in step 1) into a cold storage, and pre-freeze at a temperature of -20°C±2°C for 6 months;
[0034] 3) Cut the Gastrodia elata obtained in step 2) into 3-10mm slices, and evenly punch holes;
[0035] 4) Put the Gastrodia elata slices obtained in step 3) into a microwave freeze dryer, and freeze for 2 hours at a pressure of 10Pa and a temperature of -37°C; feed nitrogen, control the pressure at 60Pa, and reduce the microwave power in 0 to 3 hours. The microwave power is controlled at 200w / kg, the microwave power is controlled at 400w / kg in 3 to 6 hours, and the microwave power is controlled at 150w / kg in 6 to 8 hours.
[0036] Put the cold-dried Gastrodia elata slices into clean packaging bags, and pack them with nitrogen.
Embodiment 2
[0038] A gastrodia elata microwave vacuum freeze-drying method, comprises the steps:
[0039] 1) Wash the fresh Gastrodia elata with water and drain;
[0040] 2) Put the Gastrodia elata obtained in step 1) into a cold storage, and pre-freeze at a temperature of -10°C to -15°C for 1 year;
[0041]3) Cut the Gastrodia elata obtained in step 2) into 3-10mm slices, and evenly punch holes;
[0042] 4) Put the Gastrodia elata tablets obtained in step 3) into a microwave freeze dryer, and freeze for 1 hour at a pressure of 5Pa and a temperature of -40°C; feed nitrogen, control the pressure at 20Pa, and reduce the microwave power to The microwave power is controlled at 100w / kg, the microwave power is controlled at 300w / kg in 3 to 6 hours, and the microwave power is controlled at 100w / kg in 6 to 8 hours.
[0043] Put the cold-dried Gastrodia elata slices into a clean packaging bag, and seal the vacuum packaging.
Embodiment 3
[0045] A kind of Gastrodia elata microwave vacuum freeze-drying method, comprises the steps:
[0046] 1) Wash the fresh Gastrodia elata with water and drain;
[0047] 2) Put the Gastrodia elata obtained in step 1) into the cold storage, and pre-freeze at -30°C for 1 hour;
[0048] 3) Cut the Gastrodia elata obtained in step 2) into 3-10mm slices, and evenly punch holes;
[0049] 4) Put the Gastrodia elata tablets obtained in step 3) into a microwave freeze dryer, freeze for 3 hours at a pressure of 20Pa and a temperature of -35°C; feed nitrogen, control the pressure at 100Pa, and reduce the microwave power to The microwave power is controlled at 300w / kg, the microwave power is controlled at 500w / kg in 3-6 hours, and the microwave power is controlled at 200w / kg in 6-8 hours.
[0050] Put the cold-dried Gastrodia elata slices into a clean packaging bag, and seal the vacuum packaging.
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