Spraying and drying process and apparatus for Chinese medicine concentrate

Abstract

A process for concentrating and spray drying of liquid Chinese medicine includes such steps as homogenizing, spray drying and cyclone separating. Its system is composed of liquid supplying tank, pump, pipeline, hot air pipeline with air filter, air heater and accurate air filter, sterilizer, spray drying tower, and the cyclone separation unit consisting of a cyclone separator and dual-cyclone separation tower.

Description

technical field [0001] The invention relates to a technique for spraying and drying traditional Chinese medicine concentrate and equipment for the technique. Background technique [0002] Among the drying methods of traditional Chinese medicine that are widely used at present, the drying effect of vacuum drying, freeze drying and hot air circulation oven is not ideal. Not only is the drying uneven, easy to agglomerate, low efficiency and long drying time, but also manual feeding and discharging are required. Operational, susceptible to contamination, harsh operating environment. Fluidized drying bed has high drying efficiency, but it is easy to agglomerate and noisy. The freeze-drying method widely used in the field of pharmaceutical and food preparation is to use liquid nitrogen to dry at a low temperature of -20°C to -160°C, and the vacuum drying method is to use a pressure of 50 to 400hPa at a temperature lower than 35°C Under dry conditions, freeze-drying and vacuum dr...

AI Technical Summary

Problems solved by technology

[0002] Among the drying methods of traditional Chinese medicine that are widely used at present, the drying effect of vacuum drying, freeze drying and hot air circulation oven is not ideal. Not only is the drying uneven, easy to agglomerate, low efficiency and long drying time, but also manual feeding and discharging are required. Handling, susceptible to contamination, harsh operating environment

Fluidized drying bed has high drying efficiency, but it is easy to agglomerate and noisy

The freeze-drying method widely used in the field of pharmaceutical and food preparation is to use liquid nitrogen to dry at a low temperature of -20°C to -160°C, and the vacuum drying method is to use a pressure of 50 to 400hPa at a temperature lower than 35°C Under dry conditions, freeze-drying and vacuum drying require large-scale equipment, and it is difficult to adopt continuous production steps, and the production method is troublesome and laborious; at the same time, after freeze-drying or vacuum freeze-drying, grinding and homogenization The necessary additional steps make the production process more cumbersome

Spray drying is a relatively advanced drying equipment at present. It uses a micronization device to make a solution into small droplets, and then the small droplets are in contact with relatively high-temperature drying wind to evaporate water. However, the existing The technical level of the process and equipment is low, for example, the sterilization in the whole process is insufficient, which leads to the high bacterial content of the liquid medicine and the final dried product, and the unstable spraying due to the uneven viscosity of the liquid medicine, which seriously affects the quality of the dried product. Quality, low collection rate of finished products, large waste, etc., it is also difficult to deal with high-concentration liquid medicine, and the drying strength is low, and the returning material is relatively large

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