Spinneret plate cleaning process

Abstract

The invention provides a spinneret plate cleaning process. The spinneret plate cleaning process comprises the steps that firstly, a spinneret plate is cleaned through cleaning liquid, and surface spinning solution crusts are removed; the spinneret plate is soaked with a cleaning agent and cleaned by the cleaning liquid; and the spinneret plate is purged and put into a spinneret plate circulating cleaning system filled with hot solvent baths for being treated and cleaned, and finally ultrasonic cleaning is carried out. The spinneret plate is soaked in the cleaning agent to clean dirt in spinneret plate spinning holes, the cleaning agent has a good cleaning effect on a polymer stock solution, most of materials on the surface of the spinneret plate can be decomposed, then the spinneret plateis placed in the circulating cleaning system with the hot solvent baths to be treated, impurities on the surface of the spinneret plate are cooked and washed, and the better cleaning efficiency is achieved; and the spinneret plate is not damaged, and finally residues possibly existing on the surface of the spinneret plate are subjected to ultrasonic cleaning. The spinneret plate cleaning process has the advantages that the spinning holes are cleaned up, the outflow resistance of a spinning solution and the amount of fiber broken filaments at the spinning holes are reduced, damage to the spinneret plate is low, and the detection percent of pass is 93% or above.

Description

Technical field [0001] The invention relates to a spinneret cleaning process, which belongs to the technical field of spinneret cleaning in the chemical fiber industry, especially the technical field of wet spinning spinneret cleaning. Background technique [0002] The production of fibers in the chemical fiber industry generally requires a long and complicated process, which involves a lot of spinning equipment, cleaning equipment, and high-temperature treatment equipment. [0003] In the spinning process, the spinneret is one of the key equipments. Its quality is directly related to the quality of fiber products. For example, the spinneret used in wet spinning has a diameter of 50 to 350mm and a thickness of ≤10mm. Made of alloy materials, there are thousands or even tens of thousands of spinneret holes distributed on the surface of the spinneret. The diameter of the spinneret holes ranges from tens to hundreds of microns. Such a large number of densely packed small holes ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that the spinneret is not cleaned cleanly during the cleaning process, resulting in a large flow resistance of the spinning solution in the spinneret spinning holes and an increase in fiber wool, the purpose of the present invention is to provide a spinneret cleaning process, after soaking in lye, most of the materials on the surface of the spinneret can be removed, but some polymers or organic impurities will still adhere to the holes of the spinneret. In the circulation cleaning system of the solvent bath, the spinneret is boiled and rinsed. Compared with the spinneret soaked in the solvent, the cleaning in the self-made lye of the present invention has high efficiency, and then the spinneret is boiled and rinsed in the hot solvent of the spinneret circulation cleaning system. Compared with high-temperature salt bath cleaning, it can not only clean the remaining impurities in the spinneret hole, but also greatly reduce the damage to the spinneret. In the spinneret circulation cleaning system, the spinneret is placed on the interlayer, The number of interlayers can be increased or decreased according to the actual situation. The steam heating heats the solvent in the system. The high-temperature solvent has a good dissolution and decomposition effect on the materials in the pores (such as polymers or organic impurities). The booster centrifugal pump is a hot solvent. The cycle provides a certain pressure and has a better cleaning effect

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