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Device and method for making refined cottons through performing high-concentration hydrogen peroxide bleaching on cotton linters

A technology of high-concentration hydrogen peroxide and cotton linters, which is applied in the field of cotton linter pulping, can solve the problems of low pulping yield, harm to human health and ecological environment, and decrease in the degree of polymerization of cotton fibers, so as to accelerate mass transfer. The effect of increasing the rate, improving the utilization rate, and increasing the concentration

Inactive Publication Date: 2015-11-04
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, under the conditions of high temperature and high pressure, the cellulose decomposes severely, resulting in a serious decrease in the degree of polymerization of cotton fibers and a low pulping yield.
On the other hand, currently cotton linters are generally bleached with chlorine. The bleaching process produces highly toxic chlorine-containing organic compounds, causing serious harm to human health and the ecological environment.

Method used

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  • Device and method for making refined cottons through performing high-concentration hydrogen peroxide bleaching on cotton linters
  • Device and method for making refined cottons through performing high-concentration hydrogen peroxide bleaching on cotton linters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the device for preparing refined cotton by bleaching cotton linters with high-concentration hydrogen peroxide, including bale opener, metal detector, cotton opener, impurity remover, cyclone separator, first screw conveyor, half pulper, installation and decontamination The first medium-consistency refiner with a type grinding disc, the second medium-consistency refiner with a refining disc, the first double-net dehydrator, crushing screw conveyor, double-roll mixer, belt conveyor, high-consistency mixer , a high-concentration bleaching tower, a second screw conveyor, and a second double-net dehydrator, wherein the linters are connected by a belt conveyor between the bale opener, the metal detector and the cotton opener, and the cotton linters are connected between the opener, the metal detector, and the cotton opener. The impurity remover and the cyclone separator are connected by an air delivery pipeline, the outlet of the cyclone separator i...

Embodiment 2

[0048] Such as figure 2 Shown, the method for preparing refined cotton by bleaching cotton linters with high-concentration hydrogen peroxide, adopting type III cotton linters as raw material, comprises the following steps:

[0049] 1) Cotton opening and impurity removal. After the cotton linters are unpacked by the bale opener, they are checked by a metal detector and metal objects are removed, and then the cotton linters are opened and shredded into flocculent small pieces by the cotton opener. Remove some impurities, and then transport them to the impurity remover to further remove foreign impurities such as dust and cotton seed hulls; the content of foreign mechanical impurities carried by cotton linters after treatment is less than 4%;

[0050] 2) Pre-infiltrated, washed and refined, the cotton linters after cotton opening and impurity removal are mixed with NaOH solution at a temperature of 40°C and a mass concentration of 5% in a cyclone separator, and then enter the fi...

Embodiment 3

[0057] Such as figure 2 Shown, the method for preparing refined cotton by bleaching cotton linters with high-concentration hydrogen peroxide, adopting type III cotton linters as raw material, comprises the following steps:

[0058] 1) Cotton opening and impurity removal. After the cotton linters are unpacked by the bale opener, they are checked by a metal detector and metal objects are removed, and then the cotton linters are opened and shredded into flocculent small pieces by the cotton opener. Remove some impurities, and then transport them to the impurity remover to further remove foreign impurities such as dust and cotton seed hulls; the content of foreign mechanical impurities carried by cotton linters after treatment is less than 4%;

[0059] 2) Pre-infiltrated, washed and refined, the cotton linters after cotton opening and impurity removal are mixed with NaOH solution at a temperature of 80°C and a mass concentration of 2% in a cyclone separator, and then enter the fi...

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Abstract

The invention discloses a device for making refined cottons through performing high-concentration hydrogen peroxide bleaching on cotton linters. The device comprises a bale opener, a metal detector, a cotton slitting machine, an impurity removal machine, a cyclone separator, a first spiral conveyor, a half stuff machine, a first medium-concentration stuff grinder where a defibering type grinding disc is installed, a second medium-concentration stuff grinder where a stuff-grinding type grinding disc is installed, a first double-net dehydrator, a crashing spiral conveyor, a double-rod mixer, a belt conveyor, a high-concentration mixer, a high-concentration bleaching tower, a second spiral conveyor and a second double-net dehydrator. The device is simple in structure and convenient to install and maintain. The invention further provides a method for making the refined cottons through performing high-concentration hydrogen peroxide bleaching on the cotton linters. By the utilization of the method, the quality of obtained products is high, impurities are few, the yield is high, the cost is low, and environment pollution is small.

Description

Technical field [0001] The present invention is the field of cotton short velvet, and it involves a device and method for preparing formed cotton for a cotton short velvet high -thick hydrogen peroxide bleaching. Background technique [0002] The cotton fiber that is shorter than the cotton cotton is a short fiber peeled from the surface of the cottonseed on the surface of the cotton cotton. Its length is usually only 10 ~ 50%of the cotton cotton.Derivatives and other aspects.As a high -quality paper fiber raw material, it is mainly used for production paper, banknote paper and special technical use paper. [0003] Cotton short velvet itself has more than 90%of the cellulose content, and non -cellulose impurities are not much.However, many foreign impurities have been mixed in the process of production, processing, and transportation, which brings great difficulties to the pulp.Therefore, the purpose of cotton short velvet pulp is to remove foreign mechanical impurities such as c...

Claims

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Application Information

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IPC IPC(8): D21B1/34D21C1/02D21C9/16
CPCD21B1/342D21B1/345D21C1/02D21C9/163
Inventor 雷利荣李友明徐旗开朱小林黄运贤肖仙英黄放辉侯轶
Owner SOUTH CHINA UNIV OF TECH
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