Multifunctional vacuum drying oven and stage drying process thereof

Abstract

The invention discloses a multifunctional vacuum drying oven and stage drying process thereof. The multifunctional vacuum drying oven is provided with modularized assemblies and convenient to manufacture, install and maintain. An electromagnetic vibrator is arranged on the multifunctional vacuum drying oven so that the multifunctional vacuum drying oven has the function of vibrating drying, and drying speeds can be improved. The multifunctional vacuum drying oven is provided with a multistage condensation structure, and therefore more than two ingredients needing to be respectively recycled in materials can be respectively recycled. Meanwhile, the materials can have high porosity and a large drying area in the process of material drying due to a baking pan structure of the drying oven, and the drying speeds can be improved. According to the stage drying process of the multifunctional vacuum drying oven, different contents of moisture in the materials is removed by using of drying methods corresponding to the different contents of moisture, and therefore the materials can have comprehensive advantages in drying cost, drying time and drying quality.

Description

technical field [0001] The invention relates to a drying device and a drying process thereof, in particular to a multifunctional vacuum drying oven and a segmented drying process thereof. Background technique [0002] Hot air drying is a traditional drying method, which is a kind of convective heat transfer drying. The hot air is blown into the oven or drying room, and the hot air passes through the surface of the object, and the water is evaporated and then directly enters the air to be taken away. This drying method is fast, requires less investment, but has low thermal efficiency. [0003] Vacuum drying is a kind of drying that transfers heat by conduction or radiation. Its drying methods are various. Basically, it can be divided into two types: passing the boiling point and passing the melting point. One way is to dry by boiling point (also known as general vacuum drying). During the drying process, the liquid moisture vaporizes in two ways: evaporation and boiling. Wa...

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Problems solved by technology

[0005] However, there are still many defects in the equipment and drying process currently used in vacuum drying. For example, the shell of the drying box is designed as a whole. For a large drying box, it is very inconvenient to manufacture, transport, and install; the heat exchange inside the drying box Components (such as heating plates or heating coils) have no easy-to-move parts (such as casters) and are designed as one piece (such as welding) with the drying box shell. When the heat exchange components (such as heating plates or heating coils) leak When the drain needs to be repaired and cleaned, the operation is very inconvenient due to the small maintenance space; the internal heat transfer parts of the drying box are mostly coiled tubes or flat plates, the coil heat dissipation area and contact area are small, the thermal efficiency is low, the flat plate contact area is large, and the heat transfer is uniform. The cost is high and the gas convection between the layers is hindered; the baking tray is a flat-bottomed structure punched and pressed by thin plates, the radiated area is small and the punched holes are easily covered by the material, which in turn affects the heating of the material and the overflow of water vapor; the condenser is Single-stage structure, once there are two or more components in the material that need to be condensed separately, it cannot be processed; the whole drying process, the material is in a static state, and the drying efficiency is low; all kinds of moisture in the material are removed by vacuum drying, and the drying cost is high

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