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Dyeing residual liquid recycling and dye recovery processing method, and special dyeing residual liquid processing pool

A technology for dyeing residue and recycling, applied in dyeing methods, chemical instruments and methods, water/sewage treatment, etc. Biochemical, COD and chroma reduction, dye saving effect

Inactive Publication Date: 2009-07-08
CHANGZHOU TEXTILE GARMENT INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problem that the existing dyeing residue cannot be directly reused in production, the dye in the dyeing residue cannot be recovered and there is no special treatment device and equipment for dye recovery and reuse

Method used

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  • Dyeing residual liquid recycling and dye recovery processing method, and special dyeing residual liquid processing pool
  • Dyeing residual liquid recycling and dye recovery processing method, and special dyeing residual liquid processing pool
  • Dyeing residual liquid recycling and dye recovery processing method, and special dyeing residual liquid processing pool

Examples

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Embodiment 1

[0052] A method for recycling dyeing residue and recovering dyes, wherein the dyes are acid dyes and direct dyes. Among the five dyeing methods of jigger dyeing, pad dyeing, overflow, skein, and cone yarn, pad dyeing is a continuous process. Although the amount of residual liquid is small, the concentration of dyeing residual liquid is the highest, and there is no problem of reuse of continuous cylinders. The greatest impact; the amount of overflow dyeing residue is the largest, up to 1.5-2.5 tons per cylinder. It is difficult to store, and it is usually no longer considered to reuse the cylinder. Therefore, the reuse of refill cylinders is generally used in jigger, hank and bobbin processes. For some orders with many kinds of colors, when arranging the production plan, the same batch of products should master the principle of light to dark, first process the light color, and then process the dark color; when each color is produced, the dyeing residue can be continued. Cylin...

Embodiment 2

[0072] A dyeing residue recycling and dye recovery treatment method, the dyes are vat dyes or sulfur dyes, the dye recovery method in the dyeing residue and the structure of the special treatment pool for the dyeing residue are the same as in Example 1. The recycling process of dyeing residual liquid in continuous cylinder is roughly the same as that in Example 1. The specific process steps of the reuse of the residual dyeing liquid in the tank are as follows:

[0073] 1. Make the concentration-absorbance working curve of the basic dye

[0074] (1) Standard series with basic dye concentration

[0075] The basic dyes selected in production, such as vat yellow G, vat RB black, vat olive green T, vat olive green B, vat BR brown, vulcanized RDT-R brown, vulcanized RDT-E yellow, vulcanized RDT-D black, vulcanized RDT-2G Blue, sulfur RDT-GSL brown and other basic dyes are respectively configured into a series of dilute solutions with concentrations. Generally, each dye has 5-6 con...

Embodiment 3

[0085] A dyeing residue recycling and dye recovery treatment method, the dye is a reactive dye, the dye recovery method in the dyeing residue and the structure of the special treatment pool for the dyeing residue are the same as in Example 1, and the dyeing residue The recycling process of the continued cylinder is roughly the same as that in Embodiment 1. The specific process steps of the reuse of the residual dyeing liquid in the tank are as follows:

[0086] 1. Make the concentration-absorbance working curve of the basic dye

[0087] The different colors on the fabric are mainly formed by mixing the three primary colors of red, yellow and blue in different proportions. But red has bright red (yellow light red) and rose red (blue light red), yellow has green light yellow (bright yellow) and red light yellow, and blue has bright blue, dark blue and emerald blue. Therefore, the first step in reusing dyeing residual liquid is to make working curves for eight dyes of yellow li...

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Abstract

The invention relates to a method for reusing dyeing raffinate of cellulosic fiber dye, recovering and treating dye, as well as a structure of a special dyeing raffinate treatment pond. According to different dyeing methods and different application categories of dyes, typical basic dyes are selected, and the maximum absorption wavelength or characteristic wavelength of each basic dye is sought so as to determine the content of each blended dye in raffinate and reuse the raffinate in production, while the dyeing raffinate which cannot be directly used in production is recovered through a special treatment pond and a corresponding method. The invention solves the technical problems that the prior art cannot directly reuse the dyeing raffinate in production, cannot recover the dyes in the dyeing raffinate, and has no special treatment device and equipment for recovering and reusing the dyes.

Description

technical field [0001] The invention relates to a dyeing residue recycling and dye recovery treatment method and a special treatment pool for dyeing residue. Background technique [0002] Textile printing and dyeing enterprises are major polluters. One of the reasons is that in the dyeing process, the dye uptake rate of the dyes used is generally only about 50-90%, which is less than 100%. That is to say, about 10-50% of the dye enters the printing and dyeing wastewater, resulting in the increase of the production cost of the enterprise and the status quo that the sewage treatment is difficult to meet the standard discharge. From the production situation of the printing and dyeing industry: in the dyeing of cellulose fiber fabrics, yarns, fluff and other home textiles and clothing textile products, vat dyes account for about 10-20% of the total dyeing amount of all cellulose fiber dyes; Sulfur dyes are mainly used for the dyeing of deep and thick fabrics, and pad dyeing is ...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/52C02F1/24D06P1/39D06P1/22D06P1/30D06P1/38C02F103/30
Inventor 许良英田恬王明芳
Owner CHANGZHOU TEXTILE GARMENT INST
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