A cleaning method for melt-spun spandex pipeline system

A pipeline system and cleaning technology, which is applied in the cleaning field of melt-spun spandex pipeline system, can solve the problems of time-consuming and labor-intensive, short cleaning cycle, etc., and achieve the effects of saving manpower and material resources, improving stability, and prolonging the continuous production cycle

Inactive Publication Date: 2015-12-09
苏州富莱克斯氨纶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a cleaning method for the melt-spun spandex pipeline system to overcome the time-consuming and labor-intensive problems of the prior art, and the cleaning cycle is short.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] When the pipeline is about to be blocked or has been blocked, use a manual pressure pump to discharge all the residual melt in the pipeline system, so that the pipeline system is unobstructed, so that triethylene glycol can be filled into every corner of the pipeline, and every part of the pipeline system The outlet is blocked to close the entire piping system, an opening is opened in the upper part of the piping system, triethylene glycol is filled into the piping system from the opening, and the temperature of the piping system is adjusted in the range of 180°C to 300°C Inside, the pressure is greater than 10N, after the entire pipeline system is filled with triethylene glycol, the carbon and coke in the pipeline system will react with triethylene glycol to decompose or soften the carbon and coke, and start the discharge to discharge the carbon in the pipeline system coking.

Embodiment 2

[0026] When the pipeline is about to be blocked or has been blocked, use a manual pressure pump to discharge all the residual melt in the pipeline system, so that the pipeline system is unobstructed, so that triethylene glycol can be filled into every corner of the pipeline, and every part of the pipeline system The outlet is blocked, so that the entire pipeline system is closed, and the master pump located at the upper part of the pipeline system is removed, or the crosslinking agent inlet or measuring head of the upper pipeline is removed, and triethylene glycol is removed from the master pump and exposed Fill the opening into the piping system, adjust the temperature of the piping system in the range of 220°C to 235°C, and the pressure is greater than 10N. After the entire piping system is filled with triethylene glycol, the carbon and coking in the piping system will be combined with triethylene glycol. The glycol reacts to decompose or soften the carbon and coke. After 6 h...

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PUM

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Abstract

The invention provides a method for cleaning a melt-spinning polyurethane fiber pipe system. The method comprises the following steps: firstly, completely discharging all residual melts in the pipe system, and blocking each outlet of the pipe system; then, opening an opening on the upper part of the pipe system, and filling triethylene glycol into the pipe system from the opening, so that the triethylene glycol is reacted with coked carbon depositions in the pipe system, and then the coked carbon depositions are decomposed or softened; and finally, opening a car and discharging decomposed or softened coked carbon depositions in the pipe system. According to the invention, through reacting triethylene glycol with coked carbon depositions in the melt-spinning polyurethane fiber pipe system, the coked carbon depositions are decomposed or softened, so that the coked carbon depositions are cleaned, thereby extending the continuous production period of melt-spinning polyurethane fibers, and saving a large amount of manpower and material resources, meanwhile, the stability of finished polyurethane fiber yarn products is increased by more than one time.

Description

technical field [0001] The invention relates to the field of melt-spun spandex production, in particular to a method for cleaning a melt-spun spandex piping system. Background technique [0002] Melt-spun spandex has the advantages of simple process, high production efficiency, less investment in equipment, no need for solvents in the production process, no emissions and residues, and environmental protection and safety. It is known as green spandex internationally. Since the melt-spun spandex is added with a diisocyanate cross-linking agent during the spinning process, it reacts with polyurethane in the melt pipe, and the incompletely reacted cross-linking agent forms carbon and coke in the pipe. This kind of dirt is very hard. With the increase of spinning production time, the diameter of the pipe will gradually become smaller, and finally the diameter of the pipe will be completely blocked and cannot be produced. This process usually takes about one month. The convention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B9/027
Inventor 黄文贤
Owner 苏州富莱克斯氨纶有限公司
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