PET melt pipeline with coke material cleaning function

Abstract

The invention relates to a PET melt pipeline with a coke material cleaning function. The PET melt pipeline is characterized in that the PET melt pipeline comprises a melt pipeline body (1), a front pipeline main body of the melt pipeline body (1) is used for controlling the viscosity of a PET melt through a Maag pump (2); the tail end of the melt pipeline body (1) is connected with a die head (5) of a film drawing extruder; a metering pump (3) is arranged in the middle of the melt pipeline body (1), and a disc-type filter (4) is arranged at the front end of the die head (5) and used for filtering impurities in the melt pipeline body; and a steam pipe body (6) is connected beside the portion, between the Maag pump (2) and the disc-type filter (4), of the pipeline body, and a steam inlet (7) is formed in the steam pipe body (6). According to the PET melt pipeline with the coke material cleaning function, the steam pipeline body is additionally arranged on the pipeline body so that the coke material can be prevented from being generated on the pipe wall, materials entering equipment are ensured to be clean accordingly, the service life of the equipment is prolonged, and normal production is ensured.

Description

technical field [0001] The invention relates to a melt pipe, which is used for circulating polyester PET solution for subsequent film drawing production process. Background technique [0002] The stretching film production process requires the use of PET materials for stretching the film. At the same time, it has high requirements for the viscosity of PET. The stability of the viscosity is related to the uniformity of the film thickness and the stability of production. If the PET melt pipeline is shut down for a long time and heating is stopped, the temperature of the pipeline will drop, and the melt will become solid when it cools down. When the temperature is raised again to melt the melt block, it is easy to produce coke. If these coke enter the equipment, it is easy to block the equipment and cause equipment failure. The sudden rise in pressure shortens the service life of the equipment, thereby affecting normal production. Contents of the invention [0003] The objec...

AI Technical Summary

Problems solved by technology

If the PET melt pipeline is shut down for a long time and heating is stopped, the temperature of the pipeline will drop, and the melt will become solid when it cools down. When the temperature is raised again to melt the melt block, it is easy to produce coke. If these coke enter the equipment, it is easy to block the equipment and cause equipment failure. Sudden rise in pressure shortens the service life of the equipment, thereby affecting normal production

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