Automatic extraction and separation method of powdered traditional Chinese medicine decoction

Abstract

The invention relates to an automatic extraction and separation method of powdered traditional Chinese medicine decoction. The method comprises the step of performing solid-liquid separation on extract obtained by dynamic extraction; in the separation step, a first-stage centrifuge or a slag remover, a filter-type solid-liquid separator and a second-stage centrifuge are sequentially used for carrying out combined solid-liquid separation on the extract, flowing out from a dynamic extracting tank, and dregs of a decoction. The method adopts the three stages of solid-liquid separation devices, can perform continuous operation, is free from filtering bottleneck, does not cause blockage, can realize continuous production, and is high in production efficiency and low in cost; furthermore, the separated product is high in transmittance of light and less in precipitate.

Description

technical field [0001] The invention relates to the technical field of traditional Chinese medicine production, in particular to an automatic extraction technology of traditional Chinese medicine. Background technique [0002] Extraction is the primary link and an important operation unit of traditional Chinese medicine production, and the quality of its process directly affects the quality of the product. Traditional Chinese medicine extraction methods include decoction method, dipping method, reflux method, percolation method, improved gelatin method, etc., but the traditional method has many shortcomings: 1) The decoction method loses more active ingredients, especially water-insoluble components; 2) The organic solvent may interact with the active ingredients during the extraction process, making it lose its original effectiveness; 3) The extraction yield is low, the extraction time is long, and the process is cumbersome; 4) Traditional Chinese medicine manufacturers oft...

AI Technical Summary

Problems solved by technology

Traditional Chinese medicine extraction methods include decoction method, dipping method, reflux method, percolation method, improved gelatin method, etc., but the traditional method has many shortcomings: 1) The decoction method loses more active ingredients, especially water-insoluble components; 2) The organic solvent may interact with the active ingredients during the extraction process, making it lose its original effectiveness; 3) The extraction yield is low, the extraction time is long, and the process is cumbersome; 4) Traditional Chinese medicine manufacturers often use multi-functional extraction tanks to directly feed and extract , because the conventional multifunctional tank cannot keep the solvent around the material at a certain concentration difference during the extraction process, the extraction efficiency is low, and the discharged medicinal residues generally have 1-2 times the medicinal liquid, which is easy to cause certain waste

The filter includes a filter screen and a two-position filter tank. This solid-liquid separation device only separates by filtration, and the separation efficiency is low, and the separation effect is poor, so it cannot be applied to the separation of different types of traditional Chinese medicines.

[0009] In addition, the existing technology also uses ceramic membranes for solid-liquid separation, which are mainly used in preparations such as traditional Chinese medicine injections that require extremely high clarity or active ingredient purity, but for traditional Chinese medicine formula granules or general solid oral preparations of traditional Chinese medicine, ceramic Membrane separation will cause problems such as large interception loss of active ingredients, incomplete prevention and control of membrane fouling, and low production efficiency.

[0010] However, the above-mentioned solid-liquid separation devices all adopt a simple solid-liquid separation method, the separation efficiency is low, and the separation effect is poor, and there are clear requirements for the type and nature of the traditional Chinese medicine to be separated. For the separation of powdered Chinese medicine extracts, due to Powdered varieties are easy to adhere to the surface of the filter cloth after frying, making the mesh of the filter cloth smaller, resulting in low extraction efficiency and difficulty in pumping liquid, making it difficult to use the above-mentioned general solid-liquid separation equipment

[0011] In addition, patents CN108125990A and CN102068464A both disclose the extraction method of Liushenqu, but neither discloses the use of a dynamic extraction tank for extraction, nor discloses the use of a three-stage separation device for separation, and the effect and efficiency of extraction and separation are relatively low

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