Film drying production chain and method for eliminating film surface moisture using the production chain

Abstract

The invention film drying production line adopting hot wind to dry the surface of the film dynamically, comprising at least two hot wind drying devices connected in series in sequence and at least onecold wind cooling device, wherein, each hot wind drying device comprises a wave tube, a whirlwind storage hopper, an automatic temperature adjusting heater and a fan which are connected in series, the cold wind cooling device comprises a wave tube, a whirlwind storage hopper and a fan which are connected in series, wherein, the whirlwind storage hopper has a whirlwind type structure. The invention also discloses a method for removing the moisture on the film surface by adopting the production line and the hot wind with a melting point higher than that of the film in condition of appropriate wind speed and pipeline length. The moisture amount on the film dried by the method is less than 3 percent and the film is not necessary to be air-cured and is applied to the comminution granulation directly, thereby greatly shortening the production cycle and improving the production efficiency.

Description

technical field [0001] The invention relates to a film drying line and a method for removing moisture on the film surface by using the line. Background technique [0002] At present, in the process of recycling and granulating waste plastics, in order to ensure the quality of the produced pellets, the recycled waste plastics must first be cleaned, and then dehydrated by a film dehydrator. The water content of the film after the above treatment is It is usually between 15% and 25%, which cannot meet the needs of granulation. At this time, the film needs to be dried naturally, so that the water content of the film is below 3%, which meets the needs of granulation. Because natural airing requires a long cycle, thereby prolonging the production cycle, the production efficiency is low; and in the natural airing process, due to the inevitable presence of dust and other pollutants in the air, the cleaned film is polluted again. Contents of the invention [0003] A technical prob...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of recycling and granulating waste plastics, in order to ensure the quality of the produced pellets, the recycled waste plastics must first be cleaned, and then dehydrated by a film dehydrator. The water content of the film after the above treatment is Usually between 15% and 25%, which cannot meet the needs of granulation. At this time, the film needs to be dried naturally, so that the water content of the film is below 3%, which meets the needs of granulation.

Since natural drying requires a long cycle, the production cycle is prolonged and production efficiency is low; and in the natural drying process, due to the inevitable presence of dust and other pollutants in the air, the washed film is polluted again

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