Fine-denier filament spinneret ethanediol cleaning process

Abstract

The micro-fiber spinneret cleaning technique comprises the following procedures: a glycol solution is used as a cleaning agent, and the glycol solution with the concentration of 70 to 85 percent is added; a hanging basket equipped with a micro-fiber spinneret is put into a glycol cleaning furnace body, and then a furnace door is closed; when the glycol solution is heated to 230 to 24 centigrade degrees, the pressure reaches 0.36 to 0.43MPa; the solution is kept under the condition for about 3.0 to 4.0 hours, and then heating stops automatically; the pressure inside the furnace body is released to the normal pressure; a discharge valve is opened to discharge the glycol solution into a glycol solution collection tank forcefully; the hanging basket is taken out of the furnace body and is cleaned directly with an ultrasonic wave containing a 5 percent concentrated alkali solution. The technique is applicable for cleaning of a micro-fiber spinneret with the pore diameter of less than 0.15 Mu m. The cleaning qualification ratio reaches 100%, and the cleaning time is only 5 hours. Compared with the triethylene glycol cleaning, the cleaning time is reduced by 50 percent and the energy is saved by over 30 percent. Moreover, no environmental pollution is caused.

Description

Technical field: [0001] The invention relates to a cleaning process for spinnerets in pre-spinning filter equipment in the chemical fiber industry, in particular to a cleaning process for various round and special-shaped microporous fine-denier spinnerets. Background technique: [0002] The cleaning process of the existing fine-denier silk spinneret, such as using the technique of triethylene glycol alcoholysis to clean the fine-denier silk spinneret, comprises the following operations: [0003] Because chemical fiber polymers are easily scraped off from the surface of the fine-denier spinneret in a hot state, the cleaner the shovel is, the more chemical fiber polymers in the spinneret holes on the fine-denier spinneret will be polymerized. The easier it is to clean things. Therefore, first disassemble all the spinning components in a hot state, and remove the chemical fiber polymer on the surface of the fine-denier spinneret in a hot state; [0004] Place the fine-denier ...

AI Technical Summary

Problems solved by technology

[0011] Due to the poor volatility of the triethylene glycol solution, the dissolution effect on the chemical fiber polymer on the fine-denier spinneret is relatively poor, and the dissolution speed is also slow. The triethylene glycol solution has been working at a low pressure of 0.05Mpa , when cleaning the fine-denier spinneret or special-shaped hole spinneret with extremely small pore diameter (below 0.15 μm), the triethylene glycol medium cannot enter the hole and dissolve the polymer, resulting in unsatisfactory cleaning effect. In order to obtain better To improve the cleaning effect, the above cleaning process must be repeated many times, and the used triethylene glycol solution must be drained and replaced with a clean triethylene glycol solution during repeated cleaning. The cleaning efficiency is low. The cleaning time of the silk spinneret is about 10 hours. Even so, the cleaning pass rate of the fine-denier spinneret is still low, such as the cleaning pass rate of the fine-denier spinneret with the aperture below is only about 50%.