Nitrogen dehumidification dryer and dehumidification drying method of plastic material

Abstract

The invention relates to a nitrogen dehumidification dryer and a dehumidification drying method of a plastic material, which can effectively shorten the drying time and improve the drying effect. The specific technical scheme is that a sealed material barrel is connected with a nitrogen delivery device; the device comprises a compressed air filter, a nitrogen evolver, a blower and a heating device which are arranged on a delivery pipeline in sequence; the compressed air filter is arranged at an inlet of the delivery pipeline; an output end of the compressed air filter is connected with the nitrogen evolver; an output end of the nitrogen evolver is connected with the blower; the blower is connected with the sealed material barrel; the part of the delivery pipeline between the blower and the sealed material barrel is provided with the heating device. The extremely dry nitrogen is adsorbed to molecules separated from the plastic material in the sealed material barrel to discharge the molecules; compared with a pure baking means, more time is saved, the drying effect is greatly improved, and the drying requirements of various plastic materials, particularly the transparent plastic material, are easily met.

Description

technical field [0001] The invention relates to a dehumidification dryer and a dehumidification drying method for plastic materials. Background technique [0002] There are two existing techniques for dehumidification and drying of plastic materials at home and abroad. The first is to use desiccant to separate compressed air from the moisture in the air to obtain relatively dry air and send it into the material barrel to dry plastic materials. The second is to directly use the desiccant to evolve the moisture in the hot air circulating in the hot air in the material barrel. The above two technical defects and reasons are as follows; the first one requires high-pressure compressed air to purify the air, and the time required for drying plastic materials is too long; the second technical defect is that the desiccant will be quickly damaged Pollution, so that the life of the desiccant is not long. The reason for this defect is that when the plastic material is heated and drie...

AI Technical Summary

Problems solved by technology

The above two technical defects and reasons are as follows; the first one requires high-pressure compressed air to purify the air, and the time required for drying plastic materials is too long; the second technical defect is that the desiccant will be quickly damaged Contamination, so that the life of the desiccant is not long

The reason for this defect is that when the plastic material is heated and dried, there will be moisture, oil mist, plastic material and other powders, and the desiccant needs to be repaired to perform cycle work, and a large amount of electric energy and cooling water are required during the repair process.

It also takes too long for the plastic to dry

The main defect of the first two drying technologies is that the dryness of the plastic material is not enough, which leads to the disadvantages of discoloration and insufficient transparency of the produced products.

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