Method for drying astragalus mongholicus medicinal slices through vacuum heat pump
A technology of vacuum heat and astragalus, applied in the direction of drying solid materials without heating, drying solid materials, drying, etc., can solve the problems of high drying energy consumption, low dehydration efficiency, high oil content, etc., to reduce energy consumption and drying time Effect of shortening and reducing operating energy consumption
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Embodiment 1
[0044] (1) Selection, washing and slicing:
[0045] 1a) Select raw Astragalus membranaceus with a diameter of 25-60 mm, remove corrupted, damaged, deformed and diseased raw Astragalus membranaceus, and clean them;
[0046] 1b) Using a mechanical method to slice the raw Astragalus membranaceus after step 1a) after cleaning, with a slice thickness of 6 mm;
[0047] (2) Drying with solar energy combined with vacuum heat pump: The conditions for drying the astragalus decoction pieces with solar energy combined with vacuum heat pump are: vacuum pressure 3kPa, drying temperature 70°C.
[0048] During the period, the auxiliary instantaneous pulsed strong magnetic field cooperates with the pulsating controllable instantaneous pressure difference treatment: Among them, during the pulsation controllable instantaneous pressure difference treatment process, the pressure of the treatment chamber is increased to 0.5MPa, the temperature reaches 150°C, the stagnation time is 20s, and the pres...
Embodiment 2
[0068] The production method of Astragalus decoction pieces is basically the same as the method described in Example 1, except that:
[0069] The slice thickness of Radix Astragali decoction pieces in step (1) is 7mm;
[0070] Step (2) During the drying process of solar combined vacuum heat pump, the drying temperature is 45°C and the vacuum degree is 10kPa;
[0071] During the period, in step (2), the auxiliary instantaneous pulse strong magnetic field coordinated with the pulsating controllable instantaneous pressure difference processing parameters are: the instantaneous pressure difference processing temperature is 110°C, the pressure is 0.15MPa, the stagnation time is 2min, and the pressure chamber pressure is 10kPa after pressure release. During the period, the pressure difference flash operation was performed twice; during the pulsating and controllable instantaneous pressure difference treatment process, the intensity of the instantaneous pulsed strong magnetic field l...
Embodiment 3
[0083] The production method of Astragalus decoction pieces, as described in Example 1, the difference is:
[0084] The slice thickness of Radix Astragali decoction pieces in step (1) is 4mm;
[0085] Step (2) During the drying process of solar energy combined with vacuum heat pump, the drying temperature is 60°C, and the vacuum degree is 5kPa; the instantaneous pressure difference treatment described in step (2) is after the sample is placed in the processing chamber, and then dried with solar energy combined with vacuum heat pump for 2 minutes , carry out differential pressure flash evaporation, the steam temperature is 140°C, the pressure is 0.35MPa, and the treatment time is 40s; after that, the pressure is released to 5kPa, and the vacuum combined with solar energy is used for drying, with an interval of 2min, and the differential pressure flash evaporation operation is repeated 6 times; finally, the solar energy is used Combined with vacuum heat pump drying, the temperat...
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