Intermittent type vacuum microwave drying device and method for processing core material of vacuum heat insulation plate by using intermittent type vacuum microwave drying device

Abstract

The invention provides an intermittent type vacuum microwave drying device, which comprises a microwave drying chamber, wherein a bracket and a microwave generator are arranged in the microwave drying chamber; the microwave generator transmits microwave to a core material on the bracket; one end of the microwave drying chamber is communicated with a vacuum pump, and the other end of the microwavedrying chamber is communicated with an air processing device; the vacuum pump vacuumizes the interior of the microwave drying chamber; and the air processing device supplies dried air into the microwave drying chamber. A method for processing the core material of a vacuum heat insulation plate by using the intermittent type vacuum microwave drying device comprises the following steps of: 1) microwave heating, in which the microwave is transmitted to the core material through a feed-in port; 2) vacuumizing, in which the vacuumizing is performed by using the vacuum pump, and steam is taken awayby the vacuum pump; 3) dried air supplying, in which the vacuum pump and a vacuum valve are closed, an air valve is opened, the dried air is supplied into the microwave drying chamber for replacement, and a small amount of remained steam in the core material is taken away; and 4) repeatedly performing the steps for two to three times, so that the core material can be completely dried.

Description

technical field [0001] The invention relates to an intermittent vacuum microwave drying device and a method for processing the core material of a vacuum insulation board. Background technique [0002] The purpose of drying is to remove moisture or solvents from certain raw materials, semi-finished products and finished products, so as to facilitate processing, use, transportation and storage. The general drying methods include mechanical method, chemical method and heating (freezing) method. These methods either have huge equipment, high drying costs, or slow drying speed and small processing capacity. For example figure 1 As shown, electric heating is used to raise the temperature in the drying room to a specified temperature (generally above 100°C), and after keeping for a period of time, ventilation is used to cool down the temperature. The water vapor is drained, and finally the natural wind is introduced from the lower tuyeres to continue to eliminate the remaining m...

AI Technical Summary

Problems solved by technology

These methods either have huge equipment, high drying costs, or slow drying speed and small processing capacity.

E.g figure 1 As shown, electric heating is used to raise the temperature in the drying room to a specified temperature (generally above 100°C), and after keeping for a period of time, ventilation is used to cool down the temperature. The water vapor is drained, and finally the natural wind is introduced from the lower tuyeres to continue to eliminate the remaining moisture, but the natural wind introduced will increase the moisture content in the drying room, the moisture cannot be removed cleanly, and the energy consumption is large, and the heating takes time ,low efficiency

Although this traditional method can evaporate the water in the core material during the heating process, the water molecules are difficult to peel off from the core material. Even though some water is taken away during the ventilation and cooling process, the relative humidity decreases. However, the water content is still very large, and the dehumidification effect is poor

In addition, the high-temperature hot air will seriously damage the microstructure of the core material of the insulation board, and it is easy to cause local burning and melting, and there are emission pollution and fire hazards, the heat cannot be fully and effectively used, the energy consumption is high, the equipment has high operating costs, poor economic benefits, Prominent problems such as low equipment utilization

With the development of science and technology, such as the emergence of new products such as biological products, new materials (multiphase composite materials, nanomaterials, smart materials and biomedical materials, etc.), advanced ceramics, new advanced foods and new pharmaceutical products, traditional drying Technology may not always adapt

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