Multi-layer type vacuum radio frequency and hot wind combined drying method and equipment for rhizomatous traditional Chinese medicinal materials

Abstract

The invention belongs to the technical field of traditional Chinese medicinal material processing and particularly relates to a multi-layer type vacuum radio frequency and hot wind combined drying method and equipment for rhizomatous traditional Chinese medicinal materials. The equipment comprises a circular hot wind drying system, a radio frequency heating system, a pulse vacuum generation systemand an automatic control system. The circular hot wind drying system comprises a wind return pipeline (9), a wind return pipeline electromagnetic valve (11), a centrifugal fan (13), a wind input pipeline (14), an axial flow fan (15) and the like. The automatic control system comprises a human-computer interaction interface (4). The pulse vacuum generation system comprises a water drainage valve (33), an air drawing pipeline (34) and the like. The radio frequency heating system comprises a fiber optic temperature sensor (26), a material (27), a material tray (28), a weighing support (29), a drying box (47) and the like. In the drying process, the sensor is used for monitoring the change situation of media in the drying box (47) and the material (27), and based on the analysis, decision andexecution of the automatic control system, the complete equipment has the characteristics of being high in automation degree, low in labor intensity and the like.

Description

technical field [0001] The invention belongs to the technical field of processing Chinese medicinal materials, and in particular relates to a multi-layer vacuum radio frequency-hot air combined drying method and equipment for rhizome Chinese medicinal materials. Background technique [0002] Gastrodia elata, Panax notoginseng, Salvia miltiorrhiza and other large rhizome-like Chinese medicinal materials are valuable Chinese medicinal materials with high added value, but they are prone to mildew, rot and deterioration due to high moisture content after harvesting. Most of the processing in the place of origin uses natural drying and drying in a drying room, and there are common problems such as long drying time, hollow interior, and quality decline. Due to the large volume of such rhizome medicinal materials, the existing drying technology mostly adopts convection and conduction heating, which is better for sheet medicinal materials, but for larger bulk medicinal materials, th...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a vacuum radio frequency-hot air combined drying equipment to solve the problem of small loading capacity of the existing radio frequency drying, uneven heating caused by the edge effect, large energy consumption, poor heating capacity of the heat source in vacuum drying, and frequent hot air drying. Uneven layers of material, difficult to heat the inside of the material, slow drying, etc.

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