Drying system of traditional Chinese herbal medicines

Abstract

The invention relates to a drying system of traditional Chinese herbal medicines; and the system comprises a control room provided with an industrial personal computer PLC, and a sunlight greenhouse. The sunlight greenhouse is provided with a heat collecting wall in the south direction, is provided with glass wall bodies in the north and east directions, is provided with an insulation wall body having a door in the west direction, and is provided with a plastic film on a ceiling; a rotary drying bed is arranged in the sunlight greenhouse, and solar collecting lenses are respectively arranged outside the sunlight greenhouse in the south and north directions; multiple exhaust ports are evenly distributed in the heat collecting wall; multiple air filters are evenly distributed outside the glass wall body of the sunlight greenhouse in the north direction; and multiple temperature / humidity sensors are evenly distributed in the sunlight greenhouse, and are connected with the industrial personal computer PLC. The drying system effectively improves the utilization rate of solar energy, not only can achieve the purposes of evenly drying the herbal medicines and improving the product quality, but also can reduce the labor intensity, improves the production efficiency, and can be suitable for drying various specifications of the traditional Chinese herbal medicines.

Description

technical field [0001] The invention relates to a drying system, in particular to a drying system for Chinese herbal medicines. Background technique [0002] Drying technology of Chinese medicinal materials is to dry Chinese medicinal materials under artificial control conditions in order to ensure the nature, taste and active ingredients of Chinese medicinal materials, including conduction, convection, radiation in normal pressure or reduced pressure environment or in high-frequency electric field Heating to make it dry, so as to promote the evaporation of water, achieve the required moisture content, maintain good product quality, and facilitate packaging, storage and transportation. [0003] At present, the drying of Chinese medicinal materials mainly adopts sun-drying, shade-drying (air-drying) and drying processes. [0004] ⑴Drying in the sun and drying in the shade: It has a long history in our country and is the most economical method. The cost is very low, but ther...

AI Technical Summary

Problems solved by technology

[0006] (3) Drying in drying room: The drying room is mainly constructed of brick and cement structure, with burning coal and firewood as the heat source, and conducts moisture heat transfer and drying of Chinese herbal medicines through ventilation or blowing. The cost is low, and the drying capacity is large at one time. It is used in poor and resource-rich areas. The main disadvantages are that the temperature is not easy to control, the drying is uneven, the energy consumption is high, the time is long, and the product quality is poor.

[0012] The above-mentioned methods mostly adopt the principle of hot air drying, and the production cost is relatively low, but different from the requirements of other items, high moisture content, large batches, and low drying temperature are the characteristics of drying Chinese herbal medicines. Most of the existing types of dryers are Difficult to adapt

Therefore, most Chinese herbal medicine production enterprises still use the drying room and drying method, which not only has low production efficiency and high labor intensity, but also has a large loss of active ingredients and materials.

In order to improve the production efficiency of hot air drying, higher material temperature and thicker material layer are often allowed in the industry, which will cause thermal decomposition of the medicinal components of Chinese medicinal materials, causing discoloration, loss of taste, and poor quality.

[0013] In addition, Chinese medicinal materials need to be properly pretreated before drying to adjust the taste, eliminate toxicity, and reduce the initial moisture content. However, due to the complicated procedures and time-consuming, the actual drying process is often ignored or neglected. The degree of automation in the drying process It is not high enough to automatically monitor the moisture content and water activity of Chinese herbal medicines and the temperature, humidity and flow rate of the drying medium in different time periods, all of which lead to poor drying quality, and the final moisture content does not meet the requirements, which seriously affects the products of Chinese herbal medicines quality

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