Drying device for traditional Chinese medicinal materials and low-temperature circulation drying method

Abstract

The invention discloses a rapid low-temperature wind circulation intelligent drying device for traditional Chinese medicinal materials. The drying device comprises a hollow body, and the hollow body is internally provided with a drying chamber, an air duct and a moisture discharging cavity; and the device adopts a low-temperature circulation wind drying structure, and heating is uniform, the drying quality is improved. The invention further discloses a rapid low-temperature wind circulation drying method for the traditional Chinese medicinal materials and mainly comprises the steps of low-temperature circulation drying, temperature-rising drying and constant temperature drying and the like, too fast shrinkage of the surfaces of the medicinal materials due to too fast water loss is effectively prevented, so that the medicinal materials are in plump shapes; and the whole baking process is conducted in a relatively low temperature condition, and loss of volatile components is less.

Description

technical field [0001] The invention relates to a drying device and a drying method, in particular to a drying device for Chinese herbal medicines and a low-temperature circulation drying process. Background technique [0002] In the process of production and application of Chinese medicinal materials, drying is an important link that affects the quality of Chinese medicinal materials. In the GAP certification of Chinese medicinal materials, drying is one of the most important contents. In the large-scale production of Chinese medicinal materials, the drying process from fresh products to dry products is a key link in determining the quality of Chinese medicinal materials. At present, large-scale production of Chinese herbal medicines, such as Poria cocos, honeysuckle, lily, asparagus, shiitake mushrooms, day lily, etc., the drying methods commonly used mainly include sun-drying, shade-drying, air-drying, drying, smoking, etc., and most of them are agricultural product proce...

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Problems solved by technology

[0004] At present, the drying methods commonly used are sun-drying and drying. Conventional drying methods show many shortcomings in production; (1) high temperature leads to the loss of volatile components and chemical reactions of thermally unstable components, and rapid drying is often due to loss. If the water is too fast, the surface of the medicinal materials will shrink too quickly, which will affect the appearance quality of the medicinal materials; Different methods of physical and chemical properties and composition differences of different medicinal materials will cause loss and change of active ingredients; (3) Different drying methods should be used for different materials or different uses of the same material; (4) High temperature drying makes medicinal materials brittle , easy to break, causing high loss, incomplete edges and corners of medicinal materials, and reduced appearance quality, especially for flowers, leaves, fine roots, and high-starch medicinal materials, which will also cause coking and keratinization of starchy medicinal materials. (5) In order to prevent the medicinal materials from changing color, sulfur fumigation is often used to dry them. After sulfur fumigation, a large amount of sulfurous acid and other compounds remain in the medicinal materials

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