Ribbon vacuum dryer

Abstract

The invention relates to a vacuum drying machine with spiral strips. The vacuum drying machine comprises a barrel. A barrel cover is arranged on the upper portion of the barrel, a hollow support is arranged on the upper portion of the barrel cover, the upper portion of a stirring shaft is arranged in the support in a perpendicular running fit manner, and the middle lower portion of the stirring shaft is arranged in the barrel; the double spiral strips are distributed on the middle lower portion of the stirring shaft, and the outer edges of the double spiral strips are adjacent to the inner wall of the barrel; a concave scraper which is matched with the inner wall of the bottom of the barrel is arranged at the lower end of the stirring shaft; the top of the concave scraper is not higher than the bottoms of the double spiral strips. The vacuum drying machine has the advantages that the top of the scraper is not higher than the bottoms of the double spiral strips, in other words, the scraper and the double spiral strips are vertically distributed, the areas of force which is applied to materials by the scraper and the double spiral strips are small, accordingly, integral movement can be prevented when the materials in an integral container move, and caking of the materials can be prevented.

Description

technical field [0001] The invention relates to a ribbon vacuum dryer, which is used for drying, crushing, vacuum decompression and mixing of materials, and can cool the circulating gas and remove impurities. It is a multifunctional fully enclosed mixing drying equipment. Background technique [0002] In the production process of pharmaceutical, chemical, pesticide, food and other industries, the powder needs to be dried, and at the same time, a variety of powders or materials must be fully mixed, and a mixing and drying equipment is needed. Most raw materials in pharmaceutical production are heat-sensitive, so material agglomeration often occurs during the drying process, which requires shortening the drying time as much as possible and improving drying efficiency. The purity of the circulating gas used in the drying process will greatly affect the quality of the drug. big impact. Existing mixing dryers can meet the above, but there are deficiencies. As the application pu...

AI Technical Summary

Problems solved by technology

As the application publication number is CN101571345A, the single screw ribbon and the scraper used in the mixing dryer stir and mix the material. Because the frame-shaped scraper has a large volume, the single screw ribbon and the scraper act on the material. During the process, it is easy to make the material in the cylinder move together with the frame-shaped scraper and the single screw belt. The moving material is like a whole, causing the material to agglomerate, and a large amount of energy consumption is used for the circular motion of the whole material. The drying efficiency provided is low and the stirring effect on the material is limited. In addition, the solution only has the jacketed cylinder to heat the material, and the heating area is small, the heating is uneven and the process is slow.

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