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Method for cyclic dyeing by using wastewater after dyeing in yarn-dyeing field

A technology of wastewater recycling and dyeing wastewater, applied in the fields of textile dyeing, dyeing and weaving, can solve the problem of not being suitable for the reuse and dyeing of reactive dyes, and achieve the effect of reducing comprehensive production and processing costs, reducing production, and achieving obvious benefits.

Inactive Publication Date: 2020-12-08
LUTAI TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent CN 109322177 A discloses a method for recycling dyeing wastewater, which provides a dyeing method for recycling dyeing of disperse dye wastewater, but this method is only applicable to polyester fibers and their blended fabrics, and special high Molecular dispersant, not suitable for the reuse of dyeing wastewater with reactive dyes

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
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  • Method for cyclic dyeing by using wastewater after dyeing in yarn-dyeing field

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Circular dyeing of dyeing wastewater:

[0041] Using 10.0% (o.w.f) reactive dyes, commercial reactive dyes are NAVYGN (6.3% o.w.f), RED6 (1.9% o.w.f), Y4RN01 (1.8% o.w.f);

[0042] The yarn is made of pure cotton bobbin;

[0043] Dyeing process data: the amount of reactive dyes is 10% o.w.f, the dyeing bath ratio is 1:4, the dyeing temperature is 90°C, the amount of sodium sulfate is 50g / L, and the amount of soda ash is 25g / L;

[0044] Dyeing process: Put the pure cotton bobbin into the high-temperature and high-pressure yarn dyeing machine, collect the reactive dye dyeing wastewater after the previous dyeing and add it to the high-temperature and high-pressure yarn dyeing machine, raise the temperature to 35°C, adjust the pump speed to 80%, and the flow rate to 7500L / MIN / KG, pressure difference 1.2, add 50g / L Yuanming powder and keep it for 10min, then add 10.0% o.w.f reactive dye, then control the heating rate to 2.0℃ / min, raise the temperature to 90℃, keep it f...

Embodiment 2

[0050] (1) Circular dyeing of dyeing wastewater:

[0051] Using 2.0% (o.w.f) reactive dyes, the commercial reactive dyes are BLUEHL (1.1% o.w.f), RK3BS (0.4% o.w.f), YK3RS (0.5% o.w.f);

[0052] The yarn is made of pure cotton bobbin;

[0053] Dyeing process data: the amount of reactive dyes is 2% o.w.f, the dyeing bath ratio is 1:20, the dyeing temperature is 60°C, the amount of sodium sulfate is 0.1g / L, and the amount of soda ash is 10g / L;

[0054] Dyeing process: Put the pure cotton bobbin into the high-temperature and high-pressure yarn dyeing machine, collect the reactive dye dyeing wastewater after the previous dyeing and add it to the high-temperature and high-pressure yarn dyeing machine, raise the temperature to 40°C, adjust the pump speed to 90%, and the flow rate to 9000L / MIN / KG, pressure difference 1.4, add 0.1g / L Yuanming powder and keep it for 10min, then add 2.0% o.w.f reactive dye, then control the heating rate to 1.0℃ / min, raise the temperature to 60℃, keep ...

Embodiment 3

[0060] (1) Circular dyeing of dyeing wastewater:

[0061] Using 5.0% (o.w.f) reactive dyes, commercial reactive dyes are selected from BXBLN (2.8% o.w.f), NXGN (1.3% o.w.f), RX6BN (0.9% o.w.f);

[0062] The yarn is made of pure cotton bobbin;

[0063] Dyeing process data: the dosage of reactive dyes is 5% o.w.f, the dyeing bath ratio is 1:10, the dyeing temperature is 95°C, the dosage of sodium sulfate is 30g / L, and the dosage of soda ash is 15g / L;

[0064] Dyeing process: Put the pure cotton bobbin into the high-temperature and high-pressure yarn dyeing machine, collect the reactive dye dyeing wastewater after the previous dyeing and add it to the high-temperature and high-pressure yarn dyeing machine, raise the temperature to 45°C, adjust the pump speed to 95%, and the flow rate to 10500L / MIN / KG, pressure difference 1.5, add 30g / L Yuanming powder and keep it for 10min, then add 5.0% o.w.f reactive dye, then control the heating rate to 0.5℃ / min, raise the temperature to 95℃...

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
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Abstract

The invention belongs to the technical field of textile dyeing and finishing, and particularly relates to a method for cyclic dyeing by using wastewater after dyeing in yarn-dyeing field. According tothe invention, a reactive dye is added into reactive dyeing wastewater in the yarn-dyeing field, then yarns are dyed, the reactive dye is added into wastewater after dyeing, and then dyeing is continued, so that recycling is achieved. The current situation that the yarns can only be dyed with clean softened water is thoroughly changed, and the output of the dyeing wastewater can be reduced to a great extent. The dyeing wastewater does not need to be subjected to sewage treatment steps of decoloration and flocculation, and the reactive dyeing wastewater is directly used for dyeing the yarns again, so that the original wastewater treatment step is omitted. The method provided by the invention can save water and the usage amount of the dye, finally reduces the comprehensive production and processing cost of a yarn-dyed fabric, and has more obvious benefits for large-batch continuous production varieties.

Description

technical field [0001] The invention belongs to the technical field of dyeing and finishing of textiles, and in particular relates to a dyeing method in the field of yarn-dyed textiles by using waste water after dyeing to circulate. Background technique [0002] Water is an indispensable and precious resource for human beings and all living things to survive. Saving and cherishing water has become the common goal of all human beings. Printing and dyeing is a three-high industry with high energy consumption, high water consumption, and high pollution. Its wastewater discharge accounts for about 14% of the total industrial wastewater discharge in the country. The research on water saving by printing and dyeing enterprises is of great significance. [0003] At present, pure cotton, the raw material in the yarn-dyed field, is still the main raw material of the yarn, and still occupies more than 70% of the market share. The wastewater generated during the dyeing process contains ...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P1/00D06P1/44D06P3/66D06P5/02
CPCD06P1/38D06P1/0032D06P1/0008D06P1/445D06P5/02D06P3/66
Inventor 陈伟伟李友祥王家宾刘子斌王方水徐卫林孙超李忠国王冲
Owner LUTAI TEXTILE
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