Process for crushing pulp dregs in production of viscose fibers

A viscose fiber and pulp technology, applied in the field of pulp crushing technology, can solve the problems of vitrification of pulp, insufficient pulp crushing degree, etc., and achieve the effects of improving uniformity, shortening dissolution time, and saving production costs

Inactive Publication Date: 2014-11-26
CHENGDU GRACE FIBER +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem in the prior art that the pulverization degree of the pulp is not enough due to the increase of the output, and if it is violently pulverized, it will lead to the vitrification of part of the pulp, and provides a pulp pulverization process in the production of viscose fiber , can improve the pulverization degree of pulp, and at the same time improve the reaction quality of pulp, and there will be no vitrification phenomenon

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of pulp crushing process in viscose fiber production, it is characterized in that: comprise following process step:

[0020] A. Pre-crushing: crushing the pulp after the pressing process at a low speed;

[0021] B. High-speed fine crushing: transport the pre-crushed pulp to a high-speed fine grinder for high-speed fine crushing, the speed of the grinder is 1150 rpm, and the crushing time is 0.05s;

[0022] C, secondary fine crushing: carry out secondary fine crushing through the high-speed finely crushed pulp, and obtain the secondary crushed pulp with a crushing degree of 130g / L, and send it to the aging process; the speed of the pulverizer is 2240 rpm, The crushing time is 0.01s.

[0023] The pulp obtained through high-speed fine grinding in step A of the present invention is pulp with a grinding degree of 200 g / L.

[0024] In the step A of the present invention, pulverizing the pulp that has passed through the pressing process at a low rotational speed refer...

Embodiment 2

[0026] A kind of pulp crushing process in viscose fiber production, it is characterized in that: comprise following process step:

[0027] A. Pre-crushing: crushing the pulp after the pressing process at a low speed;

[0028] B. High-speed fine crushing: transport the pre-crushed pulp to a high-speed fine grinder for high-speed fine crushing, the speed of the grinder is 1440 rpm, and the crushing time is 0.08s;

[0029] C, secondary fine crushing: carry out secondary fine crushing through the high-speed finely crushed pulp, and obtain the secondary crushed pulp with a crushing degree of 200g / L, which is sent to the aging process; the speed of the pulverizer is 2800 rpm, The crushing time is 0.05s.

[0030] The pulp obtained through high-speed fine grinding in step A of the present invention is pulp with a grinding degree of 220 g / L.

[0031] In the step A of the present invention, pulverizing the pulp that has passed through the pressing process at a low rotational speed ref...

Embodiment 3

[0033] A kind of pulp crushing process in viscose fiber production, it is characterized in that: comprise following process step:

[0034] A. Pre-crushing: crushing the pulp after the pressing process at a low speed;

[0035] B. High-speed fine crushing: transport the pre-crushed pulp to a high-speed fine grinder for high-speed fine crushing, the speed of the grinder is 1295 rpm, and the crushing time is 0.065s;

[0036] C, secondary fine crushing: carry out secondary fine crushing through the high-speed finely crushed pulp, and obtain the secondary crushed pulp with a crushing degree of 165g / L, and send it to the aging process; the speed of the pulverizer is 2520 rpm, The crushing time is 0.03s.

[0037] The pulp obtained through high-speed fine grinding in step A of the present invention is pulp with a grinding degree of 210 g / L.

[0038] In the step A of the present invention, pulverizing the pulp that has passed through the pressing process at a low rotational speed refe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pulverizationaaaaaaaaaa
pulverizationaaaaaaaaaa
pulverizationaaaaaaaaaa
Login to view more

Abstract

The invention relates to a process for crushing pulp dregs in the production of viscose fibers. The process comprises the following steps of: obtaining re-crushed pulp dregs with the crushing degree of 130-200 g / L by pre-crushing, finely crushing at a high speed and finely re-crushing; and delivering the re-crushed pulp dregs to an aging working procedure. According to the process, the pulp dregs is crushed by adopting a process which combines the pre-crushing with fine re-crushing, when the yield is increased, the crushing degree can be ensured not to be lowered, and even, the phenomenon of vitrification in the pulp dregs can be ensured not to occur due to intense high-speed crushing at the same time of increasing the crushing degree, so that the condition that the vitrified pulp dregs do not etiolate with CS2, the cellulose sulfonate cannot be produced, and the quality of products are affected, is prevented.

Description

technical field [0001] The invention relates to a production process in viscose fiber, more specifically, the invention relates to a pulp crushing process in viscose fiber production. Background technique [0002] The production of viscose fiber is that the pulp reacts with alkali, and then squeezes out the excess alkali liquor through a press, and then crushes the pressed pulp through a pulverizer, and then puts it into a yellowing machine to neutralize CS. 2 React to produce cellulose sulfonate, and then dissolve cellulose sulfonate in dilute lye in the post-dissolving machine to make viscose fiber spinning stock solution. [0003] The purpose of pulverizing pulp is mainly to increase the specific surface area of ​​pulp, so that the reaction in the yellowing machine can be more uniform, the reaction quality can be improved, and the product quality can be improved. [0004] The existing pulverizers can pulverize the pulp to 200-220g / L. Due to the increase in output, there ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/34
Inventor 贺敏张明谷建平江洪
Owner CHENGDU GRACE FIBER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap