Vacuum drying uses the characteristic that the boiling point of liquid (water, or chemical or biological solvent) is reduced under low pressure. It can dry the substance to be dried at room temperature or low temperature. Because it does not damage the physical, biological and chemical characteristics of the substance to be dried, it has many needs in industry, agriculture, biomedicine and science. In the actual use of vacuum drying, the quantity of dried materials will vary with the batch, which is not easy to master. Generally, vacuum drying uses a unified drying chamber container. If the number of dried materials is small, the capacity of large drying chamber will be wasted. The capacity of the wasted drying chamber increases the space needed to reach high vacuum degree, so that the drying time is unnecessarily prolonged. Moreover, the capacity of the wasted drying chamber also increases the energy consumption in the vacuum drying process. Large capacity drying chamber will bring other problems. The large capacity of the drying chamber and the large area of its inner surface make the adhesion of the liquid on the inner surface increase after gasification, thus slowing down the evaporation process of the liquid and affecting the drying efficiency. And the large capacity drying chamber will also reduce the sensitivity of pressure monitoring in the drying chamber. The modular fast drying instrument improves the time-consuming and energy consumption of vacuum drying for mass objects. The instrument has a plurality of drying containers, which are connected with the main machine in a modular manner, and can be connected or disassembled with the drying system conveniently and quickly by the user according to the needs. Multiple drying modules share the vacuum system of the host machine, and depending on the number of dried materials, place the dried materials in one or more drying containers. Each drying container and drying system are connected separately. Each drying module is controlled separately. After the start of the drying process, monitor the drying status of each drying container. When the dried substance in a drying container reaches the drying state, the drying process of the drying container can be stopped, and only other drying containers need to be dried continuously.

The size and shape of each drying container can be designed according to the different dried materials, so as to minimize the unnecessary space and internal surface area, improve the drying efficiency, and judge the drying state more accurately.

The drying parameters of each drying container, such as drying temperature, vacuum degree, etc., can be set independently according to the drying substance.

Modular vacuum drying device and separate control method avoid the shortcomings of traditional vacuum drying device, and give full play to the characteristics of rapid vacuum drying and no damage to the dry materials, so as to reduce the drying time, save energy and improve the drying efficiency.

One of the applications of this instrument is to use it in the construction site of Expressway to dry the asphalt concrete core quickly. It adopts the modular combination of detachable and fast installation, which is suitable for the use of various construction sites.