Novel drying oven and drying method thereof

Abstract

The invention discloses a novel drying oven. The novel drying oven comprises an oven shell, an air exhaustion hole, an air inlet, a flat plate and a support used for placing the flat plate, wherein a tray used for placing dried materials is arranged on the flat plate; the flat plate is an air-permeable type flat plate; and an air inlet tube is arranged on a drying box for inlet nitrogen or carbon dioxide or inert gases. In the novel drying oven, steam evaporated from wet materials to be dried can be quickly exhausted through an air-permeable structure due to the adoption of the air-permeable type flat plate, and the mass transfer is rapid, so steam pressure of the evaporated steam is lowered, the steam is not easily detained and condensed, and the drying speed is greatly improved; and under the condition of introducing a proper gas such as nitrogen into the air inlet tube, permeable holes can obviously improve the flowing and distribution of the nitrogen in the drying oven, so the steam at all parts of the drying oven can be quickly taken away along with the nitrogen, and the drying speed is further quickened.

Description

technical field [0001] The invention relates to a novel vacuum drying oven and a drying method thereof. Background technique [0002] In the drying process of chemical substances that cannot be turned, vacuum drying ovens are often used for drying because the substances are usually heat-sensitive and the drying temperature cannot be too high, or the substances to be dried are porous and difficult to dry. Commonly used vacuum ovens have some obvious deficiencies. For example, traditional laboratory vacuum drying ovens use sidewall indirect heating, which leads to slow heat transfer and low efficiency under high vacuum conditions. Or although the heating plate of a large industrial oven can be directly heated, the heating plate is an integral piece (such as Figure 6 As shown), the mass transfer and heat transfer of water vapor in the oven are very limited. Water vapor is easy to stay or condense on the upper and lower plates or the dead corner of the inner wall of the oven, ...

AI Technical Summary

Problems solved by technology

Commonly used vacuum ovens have some obvious shortcomings. For example, traditional laboratory vacuum drying ovens use indirect heating on the side wall, and the heat transfer is slow and the efficiency is very low under high vacuum conditions.

Or although the heating plate of a large industrial oven can be directly heated, the heating plate is a whole piece (such as Image 6 As shown), the water vapor mass transfer and heat transfer in the oven are very limited

Water vapor is easy to stay or condense on the upper and lower plates or the dead corner of the inner wall of the oven, and it is difficult to remove

There are similar problems in the drying treatment of non-aqueous organic gases, such as ethanol, which leads to incomplete drying of substances

In order to achieve a good drying effect, it is necessary to increase the drying temperature or greatly extend the drying time, but this will cause changes in the properties of the material to be dried, performance degradation or decomposition of nutrients, and greatly increase energy consumption and reduce work efficiency. This is especially obvious in the fields of medicine, food processing, biological agents, catalysts, pesticides, flavors and fragrances, dyes, pigments, health products, daily chemicals, etc.

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