Lepidium meyenii walp temperature-varied drying method
A technology of variable temperature drying and maca, which is applied in the direction of drying solid materials, heating to dry solid materials, drying, etc., can solve the problems of large differences in appearance and internal quality, and avoid manpower consumption, reduce degradation, and reduce wrinkle degree Effect
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Embodiment 1
[0023] Wash the fresh yellow maca, place it at room temperature and drain it naturally until there is no moisture on the surface; then place the Chinese medicinal materials in a hot air drying oven to dry; the process parameters are as follows: stabilize the temperature for 40 hours at an initial temperature of 30°C Afterwards, uniformly heat up to 55°C at a heating rate of 5°C / 24h, then uniformly heat up to 70°C at a rate of 10°C / 12h, keep warm until dry, and the time to reach a moisture content of ≤13% is 130h. After drying, the surface of maca is smooth without wrinkles, the overall deformation is small, and its apparent color is bright (see figure 1 , 2 , 3).
Embodiment 2
[0025] Wash the fresh purple maca, place it at room temperature and drain it naturally until there is no moisture on the surface; then dry it in a Chinese herbal medicine dryer; the process parameters are, after the initial temperature is 25°C , according to the heating rate of 3 ℃ / 24h uniform heating to 55 ℃, and then 7.5 ℃ / 12h speed uniform heating to 65 ℃, heat preservation until dry, the time to reach moisture content ≤ 13% is 118h. Maca is bright in color after drying, the surface is smooth without wrinkles, and the overall deformation is small (see Figure 4 , 5 ).
Embodiment 3
[0027] Wash the fresh black maca, place it at room temperature and drain it naturally until there is no moisture on the surface; then dry it in a Chinese herbal medicine dryer; , according to the heating rate of 2.5 ℃ / 24h uniform heating to 55 ℃, and then 5 ℃ / 12h speed uniform heating to 68 ℃, heat preservation until dry, the time to reach the moisture content ≤ 13% is 123h. After drying, the appearance of maca is better, the surface is smooth and wrinkle-free, and the overall deformation is small (see Figure 6 , 7 ).
[0028] The nutrient content of yellow, purple and black maca under variable temperature drying process is shown in Table 1;
[0029] Table 1 The contents of various nutrients in maca of each color under variable temperature drying process (%)
[0030] .
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