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Supercritical CO2 waterless bleaching device and method for linen coarse yarns

A supercritical and roving technology, which is applied in the configuration of equipment for processing textile materials, textiles and papermaking, and processing textile material containers, etc. It can solve the problems of high pollution and high energy consumption, and achieve the effect of increasing the separation area.

Active Publication Date: 2017-05-17
YIXING SUNSHINE LINEN TEXTILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the high pollution and high energy consumption problems in the flax roving bleaching process, the present invention provides a flax roving supercritical CO 2 Anhydrous bleaching device and bleaching method thereof, utilizing CO 2 Instead of water medium, the clean bleaching production of flax roving is realized, which is of great significance for the technological transformation and upgrading of the flax spinning industry

Method used

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  • Supercritical CO2 waterless bleaching device and method for linen coarse yarns
  • Supercritical CO2 waterless bleaching device and method for linen coarse yarns
  • Supercritical CO2 waterless bleaching device and method for linen coarse yarns

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Embodiment 1

[0042] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The structure of the bleaching kettle used in the following examples is the supercritical carbon dioxide cheese dyeing kettle in the Chinese patent whose publication number is CN102787459A, such as the dyeing kettle structure described in Example 1 in the publication.

[0043] A kind of flax roving supercritical CO of the present invention 2 Bleaching unit:

[0044] A flax roving supercritical CO 2 Anhydrous bleaching apparatus, including the structural unit CO 2 Storage tank 1, filter 5, blender 2, booster pump 9, preheater 6, heater 10, bleaching tank 3, separation tank 4, co-solvent tank 8, liquid delivery pump 7 and magnetic circulation pump 11, Wherein, the CO2 storage tank 1, filter 5, blender 2, booster pump 9, preheater 6, bleaching kettle 3, and separation kettle 4 are connected in sequence through pipelines, and the cosolvent tank 8...

Embodiment 2

[0059] The 8kg flax roving bobbins are sequentially connected and set in the bleaching kettle 3, and the H 2 o 2 The solution is a co-solvent, placed in the co-solvent tank 8.

[0060] During the bleaching process, the refrigeration system is first turned on, and the liquid CO 2 It flows out from the CO2 storage tank 1 and is filtered through a filter 5 to remove possible impurities. H in cosolvent tank 8 2 o 2 The solution is injected into the co-solvent inlet of the blender 2 under the action of the liquid delivery pump 7, and enters the pinhole delivery tube inlet 26 through the co-solvent passage 25, flows out at the pinhole delivery tube outlet 27 through the pinhole delivery tube 28, and is liquid mixing channel 29 with CO 2 Mix well. The CO2 uniformly dissolved with the co-solvent is injected into the bleaching kettle 3 under the action of the high-pressure pump; and then enters the supercritical state under the action of the preheater 6 .

[0061] Supercritical ...

Embodiment 3

[0065] The 5kg flax roving bobbins are sequentially connected and sleeved in the bleaching kettle 3, and the H 2 o 2 The solution is a co-solvent, placed in the co-solvent tank 8.

[0066] During the bleaching process, the refrigeration system is first turned on, and the liquid CO 2 in CO 2 The outflow from storage tank 1 is filtered by filter 5 to remove possible impurities. H in cosolvent tank 8 2 o 2 The solution is injected into the co-solvent inlet of the blender 2 under the action of the liquid delivery pump 7, and enters the pinhole delivery tube inlet 26 through the co-solvent passage 25, flows out at the pinhole delivery tube outlet 27 through the pinhole delivery tube 28, and is Fully mix with CO in the liquid mixing channel 29. The CO2 uniformly dissolved with the co-solvent is injected into the bleaching kettle 3 under the action of the high-pressure pump; and then enters the supercritical state under the action of the preheater 6 .

[0067] Supercritical CO...

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Abstract

The invention discloses a supercritical CO2 waterless bleaching device and method for linen coarse yarns. On the basis of the prior art, structures of a blending device and a separator are improved, when bleaching is conducted, the linen coarse yarns are placed into a bleaching kettle in sequence, a H2O2 solution serves as a cosolvent, and when a supercritical CO2 state is achieved, bleaching is conducted for 30-150 min on the conditions that the temperature ranges from 50 DEG C to 150 DEG C, the pressure ranges from 8 MPa to 30 MPa, and the CO2 fluid flow rate ranges from 10 g / min to 50 g / min. The whiteness of the linen coarse yarns obtained after bleaching is 40%-75%, the weight loss ratio is 7%-10%, the residual gum content is 7%-12.5%, the single fiber tensile strength is 5-12 cN / dtex, and the elongation at break is 5%-8%. Accordingly, CO2 is utilized for replacing a water medium to achieve clean bleaching production of the linen coarse yarns, the whole process of bleaching is free of pollution and achieves zero emission, and the modern life concepts of fashion bast fiber spinning and green bast fiber spinning are embodied.

Description

technical field [0001] The present invention relates to a kind of supercritical CO 2 Fluid anhydrous bleaching technology, especially related to a flax roving supercritical CO 2 An anhydrous bleaching device and a bleaching method thereof. Background technique [0002] Flax fiber is the earliest high-quality plant fiber used by humans, accounting for 1.5% of the total natural fiber. Its chemical composition mainly includes cellulose, hemicellulose, pectin, lignin, waxy and nitrogenous substances, among which hemicellulose, lignin and pectin are difficult to remove, and the crystallinity and orientation degree of flax fiber molecules are relatively high. High, it is easy to affect the elongation, elasticity, clustering, softness and crimp of the fiber, which brings a lot of inconvenience to the flax fiber spinning and weaving process. Therefore, the bleaching of flax roving has always been a problem of concern to the hemp spinning industry. Over the years, a lot of resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06B23/18D06B23/20D06L4/13D06L4/18
CPCD06B23/18D06B23/20
Inventor 郑来久张娟高世会郑环达闫俊韩益桐吴劲松李飞霞
Owner YIXING SUNSHINE LINEN TEXTILE CO LTD
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