Continuous vacuum microwave drying device

Abstract

The invention discloses a continuous vacuum microwave drying device, and belongs to the technical field of drying devices. The device comprises a vacuum continuous feeding mechanism, a vacuum microwave dryer, a vacuum drying chamber and a vacuum continuous discharge mechanism, wherein the vacuum microwave dryer is arranged on the vacuum drying chamber and used for vacuum microwave drying of a material introduced into the vacuum drying chamber; the vacuum continuous feeding mechanism is connected with the feeding hole of the vacuum drying chamber; and the vacuum continuous discharge mechanism is connected with the discharge hole of the vacuum drying chamber. The device has the advantages that: the material is dried and processed by using microwave under the vacuum condition, the vacuum drying ensures that the material can be dried under the low-temperature condition, and the microwave drying of the material has instantaneous high efficiency, so that quick and continuous low-temperature drying of the material can be realized, the energy is saved and the drying efficiency is improved; and decomposition of alkaline-earth metal chlorides is reduced, so that the polymerization requirements of poly-p-phenylene terephthamide and copolymer thereof are met, and the molecular weight of the obtained polymer is distributed uniformly.

Description

technical field [0001] The invention belongs to the technical field of drying devices, and in particular relates to a continuous vacuum microwave drying device, which is used for continuous drying of alkaline earth metal chloride used as a co-solvent for the polymerization of poly(p-phenylene terephthalamide) and its copolymers. Background technique [0002] The alkaline earth metal chlorides mentioned above are mainly but not absolutely limited to be used in the polymerization of poly-p-phenylene terephthalamide and its copolymers, because as known in the industry, in poly-p-phenylene terephthalamide In the polymerization process of its copolymer, it is necessary to add alkaline earth metal chloride as a cosolvent, and it is required that the moisture in the system is lower than 100ppm during the polymerization of polyparaphenylene terephthalamide. Therefore, it is necessary to use it as a cosolvent Alkaline earth metal chlorides are dried to dryness (absolutely dry), howev...

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Problems solved by technology

[0004]Obviously, the latter of the aforementioned two drying methods, that is, the vacuum drying method, can show an ideal effect on alkaline earth chlorides compared to the former hot air drying method. Drying effect, but in the drying process, the energy consumption is large, the production efficiency is low, and the long-term high-temperature drying is easy to cause the decomposition of calcium chloride to produce hydrogen chloride gas system.

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