Normal-temperature preparation method of ultramicro Bailong powder and special bidirectional airflow screening machine thereof

Abstract

The invention discloses a normal-temperature preparation method of ultramicro Bailong powder. The preparation method comprises the following steps of: firstly preparing, Chinese pulsatilla root, radix gentianae and Coptis chinensis slices processed for decoction in parts by weight and drying till the water content is not more than 10%; crushing the dried medicinal materials at normal temperature to obtain coarse Chinese medicine powder with granularity of 60-80 meshes; uniformly mixing the coarse powder in a ratio of 6:3:1 and crushing in a rod mill, and then blowing the crushed coarse powder into a special bidirectional airflow screening machine by air and screening by using a 500-mesh screen so as to obtain powder material with granularity not more than 25 microns, conveying the powder material into a cyclone material collector for collecting by airflow generated by a draught fan so as to finally obtain the finished product of ultramicro Bailong powder; and collecting powder material which is not screened by the 500-mesh screen by using a funnel and conveying the collected powder material into the rod mill for cyclic crushing by a pipeline. The preparation method has the advantages that the whole preparation process is performed at normal temperature in no need of low temperature or special additional conditions; the granularity of finished product of ultramicro Bailong powder is not more than 25 microns, therefore the cell-wall breaking ratio and bioavailability are improved greatly. By the adoption of the bidirectional airflow screening machine in the preparation method, the preparation process of the ultramicro Bailong powder is simplified.

Description

technical field [0001] The invention relates to the field of veterinary drug preparations, in particular to a method for preparing superfine powder Bailongsan at normal temperature; the invention also relates to a special two-way airflow sieving machine used in the method. Background technique [0002] Chinese herbal medicine is a cultural treasure of our country. The first book related to natural medicine in the world is my country's "Shen Nong's Herbal Classic". Chinese herbal medicine has incomparable advantages in the prevention and treatment of diseases: high safety , less toxic and side effects, more active ingredients, less harmful residues, more targets, can play a combined effect, not easy to produce drug resistance, can regulate the body's immunity and enhance the body's disease resistance while antibacterial and antiviral. Under the background that countries around the world are increasingly emphasizing food safety and calling for green and ecological conditions, i...

AI Technical Summary

Problems solved by technology

Bailong powder currently used in livestock and poultry is mostly coarsely crushed powder, which has the disadvantages of large dose, coarse dosage form, and poor appearance. Moreover, it cannot be evenly mixed with pellet feed, and cannot be directly added to drinking water for use.

[0004] Traditional Chinese medicine ultrafine pulverization technology is an update and development of traditional pulverization technology. It not only retains the advantages of traditional Chinese medicine preparation technology, but also injects new vitality into the modern production of Chinese medicine. It has broad application prospects, but there are still some problems in actual production. Problems and problems: (1) Low production efficiency and high energy consumption are the main factors restricting the large-scale production of veterinary traditional Chinese medicine ultrafine powder

In the traditional closed-circuit crushing process of the rod mill, when most of the materials have reached the fineness requirement, there is always a small part of coarse powder mixed in it, and the crushing time needs to be greatly extended to further crush this part of the coarse powder to the required particle size , so that the crushing efficiency is reduced, and the energy consumption is greatly increased; (2) There is a difference in particle size uniformity of the material after classification in winnowing classification and classifying wheel classification, which greatly affects the production quality of Chinese veterinary drug compound superfine powder, especially in the application of animal When using drinking water, it is difficult to meet the usage requirements due to the existence of a small amount of unbroken cells

(3) In the traditional unidirectional airflow screening, when Chinese medicine is ultrafinely pulverized, as the particle size decreases, the surface area and surface energy of the material particles increase, the adsorption increases, the fluidity becomes poor, and it is easy to aggregate into large particles It is difficult to sieve and classify powders with a fineness of more than 200 mesh

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