Dynamic solid vacuum drying machine

Abstract

The invention relates to a dynamic solid vacuum drying machine. The dynamic solid vacuum drying machine comprises a box which can be vacuumized. A rotatable barrel used for material drying is transversely arranged in the box and connected with a rotation control driving system, and the barrel can rotate and reversely rotate at the preset rotating speed. The box is connected with a vacuum system. The barrel comprises an inner barrel body and an outer barrel body. A jacket is formed between the inner barrel body and the outer barrel body, and materials in the barrel can be heated or cooled at a preset temperature by inputting temperature-controllable heating or cooling media into the jacket. Flow guide blades and stirring blades are arranged on the inner wall of the barrel. The drying time of the materials in the barrel is kept consistent, the drying efficiency is greatly improved, the nature of the dried materials is not changed, the uniformity of the dried materials is ensured, and the problem of waste caused by extraction of the materials is avoided; and due to the fact that the materials are dried in the barrel, the number of contaminated spots is small, and cleaning is convenient.

Description

technical field [0001] The invention belongs to the technical field of vacuum drying, and in particular relates to a dynamic solid vacuum dryer. Background technique [0002] In the pharmaceutical industry, vacuum drying ovens and double-cone vacuum dryers are usually used to dry solid materials, and the solid materials are heated in a vacuum state. Since the evaporation point of water is lowered in a vacuum state, the material can be dried at a low temperature. Yet there is following defective in above-mentioned drying equipment, performance is as follows: [0003] (1) Problems existing in the existing vacuum drying oven [0004] 1. The material is placed in a tray layer by layer on the bracket, and there is a heating coil under the bracket. Since the material has a certain thickness in the tray, it is not easy to emit moisture after it turns into steam during the drying process. This greatly affects the drying efficiency. [0005] 2. Steam is passed through the lower c...

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Problems solved by technology

This greatly affects the drying efficiency

[0005] 2. Steam is passed through the lower coil. Since the tube and the tray are in line contact, the heat conduction effect is not good in a vacuum state, so uneven drying occurs.

Due to the local high temperature, the properties of the material change, and the active ingredients or influencing ingredients of the dried material are lost.

[0006] 3. Due to the steam in the coil, it is difficult to control the temperature, which directly leads to the denaturation of the material

[0007] 4. It is inconvenient to load and unload materials, the labor intensity of workers is high, and the pollution points increase

The inside of the cylinder is vacuumed, and the cylinder rotates. Due to the direct vacuuming inside the cylinder, the applicability of this dryer is significantly reduced.

Because the cylinder rotates, the material is moving in the cylinder, but when the cylinder is evacuated, it is easy to pick up the material, causing the pipeline to be blocked, and even not working properly

Therefore, it is not possible to dry powdery materials or materials that are prone to dust during the drying process.

So little adaptability

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