CN113063265A

CN113063265A - Chemical fiber spinning slice drying process

Info

Publication number: CN113063265A
Application number: CN202110495232.9A
Authority: CN
Inventors: 贲永宝; 贲中华; 沈建中; 张春勤
Original assignee: ZHANGJIAGANG XINXIN CHEMICAL FIBER CO Ltd
Current assignee: ZHANGJIAGANG XINXIN CHEMICAL FIBER CO Ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2021-07-02

Abstract

The invention relates to a chemical fiber spinning slice drying process, which comprises the following steps: removing impurities from the spinning slices by using a dust removal device, placing the spinning slices into a crystallization bed for pre-crystallization, performing primary drying by using a drying tower, placing the spinning slices into a small storage tower for secondary drying, detecting the humidity of the spinning slices by using a humidity detection device of the small storage tower, and finally obtaining the dry spinning slices with stable water content. The chemical fiber spinning chip drying process is continuously optimized and improved for a chip drying process and a chip drying flow, so that chips can be uniformly dried, and the production efficiency is improved. The novel process is dehumidified twice, and dry air is introduced into the small storage tower to dry the spinning slices, so that the slices are dried uniformly and are not adhered, the production requirements of differential fibers such as terylene and the like can be met, the requirement of producing high value-added fibers is met, and the development of the differential fibers is promoted; the dry chips are used for producing fine denier terylene by a conventional method, and the flying yarn in the production process of terylene is reduced.

Description

Chemical fiber spinning slice drying process

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of spinning, in particular to a chemical fiber spinning slice drying process.

[ background of the invention ]

With the improvement of the technology, the living quality of people is improved, so that the requirements on wearing clothes and the like are higher and higher, for slice spinning, slices are raw materials for chemical fiber production, and the subsequent stable production is directly influenced by the quality of the dried slices; at present, a plurality of slice drying processes adopted at home are introduced from foreign countries, but new equipment is developed at home in recent years. With the continuous development of differential fibers such as superfine denier, the drying requirement on the slices is higher and higher, so that polyester filaments with various purposes, such as superfine denier filaments, porous filaments, imitated silk, special-shaped filaments and the like, need to be produced, and great challenges are brought to process research;

the quality requirement for drying the slices during spinning of the yarns is higher than that of conventional spinning, the moisture content of the dried slices is generally required to be below 25ppm, the slice drying process and the slice drying process need to be continuously optimized and modified in order to ensure the normal spinning quality and spinning production, and the traditional drying mode and drying equipment have the defects of high moisture content and large fluctuation after the slices are dried, so that the production of the fine denier yarns of the polyester cannot be met.

[ summary of the invention ]

In order to solve the problems, the invention aims to provide a chemical fiber spinning chip drying process, which solves the problems that the water content is high and the fluctuation is large after chips are dried in the conventional drying mode and drying equipment, and the production of fine denier polyester yarns cannot be met.

In order to achieve the purpose, the invention provides the following technical scheme: a chemical fiber spinning slice drying process sequentially comprises the following steps;

step 1: putting the spinning slices into a dedusting device to remove dust and impurities, then putting the spinning slices into a pre-crystallization bed, setting the pre-crystallization temperature to be 130-140 ℃, setting the pre-crystallization time to be 10-45min, then putting the spinning slices into a drying tower, drying the spinning slices by using a molecular sieve and a heater, and then entering the step 2;

step 2: taking out the spinning slices obtained in the step 2 and putting the spinning slices into a small storage tower, setting the heating temperature of a communicated heater to be 180-200 ℃, adjusting the air pressure of heated dry air through an air regulator to enter the small storage tower, setting the air pressure of the air regulator to be 0.8-3.7kgf/cm2, and entering the step 3;

and step 3: and (4) storing the humidity of the spinning slices detected by the humidity detection equipment of the small tower, and finally obtaining dry spinning slices with the water content stabilized at less than or equal to 17 ppm.

Preferably, the regeneration air temperature of the drying tower in the step 1 is controlled to be 85-98 ℃.

Preferably, the residence time of the spinning chips in the drying tower in the step 1 is 6.5-8.5 h.

Preferably, the residence time of the spinning chips of step 2 in the small storage tower is 1.5-3 h.

Compared with the prior art, the invention has the following beneficial effects:

(1) the chemical fiber spinning chip drying process is continuously optimized and improved in chip drying process and chip drying flow, so that chips can be uniformly dried, and production efficiency is improved. The novel process is dehumidified twice, and dry air is introduced into the small storage tower to dry the spinning slices, so that the water content of the slices is less than or equal to 17ppm, the slices are dried uniformly and are not adhered, the production requirements of differential fibers such as terylene and the like can be met, the requirements of producing high value-added fibers are met, and the development of the differential fibers is promoted; the dry slices with the water content less than or equal to 17ppm are used for producing the terylene fine denier by a conventional method, the condition of filament floating in the production process of terylene is reduced, and the qualification rate reaches 99 percent.

[ detailed description ] embodiments

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention is further described in detail by the following examples.

Examples

The drying process of the chemical fiber spinning slice comprises the following steps:

step 1: putting the spinning slices into a dedusting device to remove dust and impurities, then putting the spinning slices into a pre-crystallization bed, setting the pre-crystallization temperature to be 130-140 ℃, setting the pre-crystallization time to be 10-45min, then putting the spinning slices into a drying tower to be dried by using a molecular sieve and a heater, controlling the regeneration air temperature of the drying tower to be 85-98 ℃, setting the residence time of the spinning slices in the drying tower to be 6.5-8.5h, and then entering the step 2;

step 2: taking out the spinning slices obtained in the step 2 and putting the spinning slices into a small storage tower, setting the heating temperature of a communicated heater to be 180-plus 200 ℃ by the small storage tower, adjusting the air pressure of heated dry air by an air regulator to enter the small storage tower, setting the air pressure of the air regulator to be 0.8-3.7kgf/cm2, setting the residence time of the spinning slices in the small storage tower to be 1.5-3h, and then entering the step 3;

In order to ensure the spinning quality and the normal spinning production, the process of the invention continuously optimizes and reforms the slice drying process and the slice drying flow, so that the slices can be uniformly dried, and the production efficiency is improved. The novel process is dehumidified twice, and dry air is introduced into the small storage tower to dry the spinning slices, so that the water content of the slices is less than or equal to 17ppm, the slices are dried uniformly and are not adhered, the production requirements of differential fibers such as terylene and the like can be met, the requirements of producing high value-added fibers are met, and the development of the differential fibers is promoted; the dry slices with the water content less than or equal to 17ppm are used for producing the terylene fine denier by a conventional method, the condition of filament floating in the production process of terylene is reduced, and the qualification rate reaches 99 percent.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. A chemical fiber spinning slice drying process is characterized in that: sequentially comprises the following steps;

2. The chemical fiber spinning chip drying process of claim 1, characterized in that: and (3) controlling the regeneration air temperature of the drying tower in the step (1) to be 85-98 ℃.

3. The chemical fiber spinning chip drying process of claim 1, characterized in that: the residence time of the spinning chips in the step 1 in the drying tower is 6.5-8.5 h.

4. The chemical fiber spinning chip drying process of claim 1, characterized in that: the residence time of the spinning chips in the step 2 in the small storage tower is 1.5-3 h.