Preparation method for submicron pine needle powder at normal temperature and special bidirectional air-flow screening machine

Abstract

The invention discloses a preparation method for submicron pine needle powder at normal temperature. The method comprises the following steps: cutting the Chinese herbal medicine pine needle into long segments with a length of 3 to 5 cm and naturally drying the long segments until moisture content in the long segments is no more than 10%; crushing the long segments of pine needle at normal temperature so as to obtain coarse powder with a granularity of 60 to 80 meshes; grinding the obtained coarse powder in a rod mill, blowing the ground powder into a special bidirectional air-flow screening machine with wind for sieving with a 500-mesh sieve so as to obtain powder with a particle size of no more than 25 mu m and conveying the powder with air-flow generated by an induced draught fan to a cyclone material collector for collection so as to obtain a finished product of the submicron pine needle powder; collecting powder which is not screened by the 500-mesh sieve by a funnel and conveying the collected powder to the rod mill through a pipeline for secondary cyclic grinding. The invention has the following advantages: the whole preparation process is carried out at normal temperature,and no low temperature condition or a special additional condition is needed; the prepared finished product has a particle size of no more than 25 mu m, which enables a cell-wall breaking ratio and bioavailability to be substantially improved; the bidirectional air-flow screening machine used in the invention enables the preparation method for the submicron pine needle powder to be simplified.

Description

technical field [0001] The invention relates to the field of veterinary drug preparations, in particular to a method for preparing ultrafine powder pine needle powder at normal temperature; the invention also relates to a special two-way airflow sieving machine used in the method. Background technique [0002] It is an urgent need to expand the export of livestock products and improve product quality by using Chinese herbal medicine additives to prevent and control diseases, replace and reduce the dosage of chemicals and antibiotics, and produce pollution-free "green livestock and poultry products". Using different usage methods and formulas for breeding can improve the body's resistance, promote growth, reduce the disadvantages of drug residues, and have the effect of "treating both symptoms and root causes", which is worth popularizing. How to prevent and control epidemic diseases, improve the health level of livestock and poultry, so as to prevent and cure diseases, promo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing ultrafine powder pine needle powder at room temperature, which effectively solves the problems of large energy consumption, difficulty in accurately controlling the maximum particle size of the drug, inability to continuously produce, and much dust in the production process in the production of traditional Chinese medicines. The finished drug has the effects of quick onset, good curative effect, high bioavailability, and less clinical dosage

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