Device and method for cleaning pipelines for cationic polyester melts

Abstract

The invention discloses a device and a method for cleaning pipelines for cationic polyester melts. The device comprises a melt discharge pump; the melt discharge pump is mounted on a polyester melt discharge pipeline of a cationic polyester melt manufacturing device; the polyester melt discharge pipeline is connected with a melt four-way valve; the melt discharge pump is connected with a first pipeline; the first pipeline is connected with an electric heater; the electric heater is connected with a public engineering steam system by a second pipeline; a steam valve is mounted on the first pipeline; a nitrogen pipeline is mounted on the first pipeline between the steam valve and the melt discharge pump; a third pipeline is mounted on the polyester melt discharge pipeline between the melt discharge pump and the melt four-way valve; the third pipeline is connected with a cleaning collecting vehicle by a metal hose; a melt blow-off valve is mounted on the third pipeline; the cleaning collecting vehicle is connected with a cleaning waste liquid receiving device by a fourth pipeline. The device and the method have the advantages that the pipelines for the cationic polyester melts can be cleaned by the aid of the device and the method, equipment can be prevented from being corroded, energy can be saved, and environments can be protected.

Description

technical field

[0001] The invention relates to a cationic polyester melt pipeline cleaning device and a cleaning method thereof. Background technique

[0002] Polyester fiber is currently the most widely used synthetic fiber in the world. Its manufacturing process is a chemical reaction, through the esterification reaction of purified terephthalic acid and ethylene glycol, and further polycondensation reaction to generate a polymer thermoplastic material with a molecular weight of about 20,000. , and then thermally stretched to produce fibers with a certain strength. China is a big polyester fiber manufacturer. At present, the annual output of polyester fiber is 50 million tons. There are many polyester melt direct spinning production devices in China. The market provides a large amount of high-quality synthetic fibers. At the same time, the maintenance of these production devices has become an important guarantee for the production of high-quality products. Generally, poly...

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