Method for washing CPF-PT series type melt filters

Abstract

The invention discloses a method for washing a CPF-PT series type melt filters and aims at solving the defects in the prior art that solvents are used for washing the filters in an existing method for washing the CPF-PT series type melt filters, so that the pollution to the environment is caused and a certain risk is caused; due to the application of vacuum calcinations, the destructive influence on the filters is caused, and thus the service life of filter elements is shortened. By virtue of the method, a polymer is quickly hydrolyzed in the presence of high-temperature steam so as to generate compounds which are low in molecular weight, so that the macromolecular compounds are high in viscosity and adhesion, and can be separated from the polluted filter elements to be washed, and the purpose of washing the filter elements can be achieved. The method is convenient to operate and has almost no pollution to the environment; the method is an economical and applicable method for washing the filter elements; moreover, the hydrolysis temperature is lower than the calcinations temperature of a calcinations furnace; the hydrolysis time can be used for adjusting the washing time according to the factors such as the size and the number of the washed filter elements, and the like.

Description

technical field [0001] The invention relates to a cleaning method, in particular to a cleaning method for CPF-PT series melt filters. Background technique [0002] At present, there are two ways to clean CPF-PT series melt filters at home and abroad, namely triethylene glycol cleaning and vacuum calcination cleaning. However, both of these two cleaning methods have certain disadvantages: when cleaning with triethylene glycol, since triethylene glycol is a flammable and explosive chemical, it needs to cooperate with electric heating and water cooling systems during cleaning, resulting in high energy consumption; and three After 6 batches of glycol cleaning, rectification is required, and the processing cost is relatively high. The comprehensive cleaning cost of each spinneret is more than 4.5 yuan / time; during vacuum calcination cleaning, due to mainly relying on radiation heat transfer, the temperature in the furnace is not stable. Uniformity, local high temperature is easy...

AI Technical Summary

Problems solved by technology

However, both of these two cleaning methods have certain disadvantages: when cleaning with triethylene glycol, since triethylene glycol is a flammable and explosive chemical, it needs to cooperate with electric heating and water cooling systems during cleaning, resulting in high energy consumption; and three After 6 batches of glycol cleaning, rectification is required, and the processing cost is relatively high. The comprehensive cleaning cost of each spinneret is more than 4.5 yuan / time; during vacuum calcination cleaning, due to mainly relying on radiation heat transfer, the temperature in the furnace is not stable. Uniformity, local high temperature is easy to damage the filter layer, inorganic substances such as matting agent in polyester cannot be cracked at high temperature, and it is difficult to clean, and some polyester is also prone to carbonization due to high temperature, and it is difficult to be cleaned in the subsequent process , for special-shaped holes and round holes with a diameter of 0.16mm-lower, there are often solid residues on the hole wall, making it difficult for the cleaning effect to meet the production requirements of high-quality fibers

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