Process for microwave-freeze-drying dendrobium stem decoction medicine pieces

Abstract

A process for microwave-freeze-drying dendrobium stem decoction medicine pieces comprises the steps of grading, wherein fresh dendrobium stems are divided into three grades according to the number of stem sections; cleaning, wherein the graded dendrobium stems are cleaned separately and drained off to be reserved; preprocessing, wherein the dendrobium stems which are drained off are placed into a microwave dryer and subjected to microwave processing for 1-3+ / -0.5 minutes; segmented cutting, wherein each cooled dendrobium stem is divided into three segments according to the top, the middle portion and the root portion, and the top and the middle portion of each dendrobium stem are cut into thin sheets with the thickness from one mm to four mm; pre-freezing, wherein the cut dendrobium stem thin sheets are placed into a freezer and pre-frozen at the temperature from minus 10 DEG C to minus 20 DEG C for more than four hours; freeze-drying, wherein the cold trap temperature of a freezer dryer is lowered to be within the range of minus 55 DEG C to minus 65 DEG C for four to six hours, the pre-frozen dendrobium stem thin sheets are placed in the freezer dryer, and after sublimation is over and the temperature of a material disk returns to 20 DEG C, materials can be taken off after the temperature is kept at 20 DEG C for two to three hours, and then the dendrobium stem decoction medicine pieces are obtained.

Description

Technical field [0001] The invention relates to a processing technology of Dendrobium nobile, in particular to a processing technology of microwave-freeze-dried decoction pieces of Dendrobium nobile, and belongs to the technical field of processing and processing of decoction pieces of Chinese medicinal materials. Background technique [0002] Dendrobium nobile has the effects of nourishing yin and clearing heat, replenishing stomach, nourishing fluid, moistening lungs and relieving cough, etc. It has high medicinal value and health care functions. In recent years, the demand for medicines and health care products has increased year by year. Dendrobium nobile is listed as a national rare and endangered medicinal plant species. It is the main characteristic high-quality medicinal material in Guizhou, especially Chishui, the main producing area. It occupies more than 70% of the market share of Dendrobium nobile medicinal material and has been protected by the national geographica...

AI Technical Summary

Problems solved by technology

[0004] Although the current processing method of Dendrobium nobile decoction pieces has initially solved the problem that the above-mentioned traditional manual processing method is difficult to dry the Chinese medicinal materials in time; but there are still high temperature requirements in the processing and shaping of the decoction pieces, which is difficult to control; at the same time, a large amount of dust will be generated, which is not conducive to the environment. Hygiene and labor protection of operators, and produce a large amount of broken pieces and broken powder, cause waste and affect the attractive in appearance of sheet shape; In addition, because the high-temperature roasting in the whole processing process makes active ingredient loss in Dendrobium nobile more, batches There are large differences between times, and the stable control of quality is relatively difficult