Method for dyeing fabric by using reactive dye and soaping fabric dyed by reactive dye, and equipment

Abstract

The invention relates to a method for dyeing a fabric by using a reactive dye and soaping the fabric dyed by the reactive dye, and equipment. A hydrolyzed reactive dye in dyeing and soaping liquid is decolorized by a decolorizing technology and then recycled. According to the method, a decolorizing device is connected with soaping equipment in the dyeing and soaping processes, the soaping liquid is forced to pass through the decolorizing device and be subjected to a closed cycle in a dye vat and the decolorizing device during dyeing and soaping, the hydrolyzed dye which is eluted from the fabric in the soaping liquid is continuously adsorbed or decomposed by the decolorizing device, and the eluted hydrolyzed dye is completely removed after the cycle is performed for a certain period of time, so that the process of soaping the fabric dyed by the reactive dye is finished. The used equipment comprises reactive dye dyeing equipment and the hydrolyzed dye decolorizing device which are connected in series with each other, wherein the hydrolyzed dye decolorizing device is provided with an on-line automatic control system which automatically controls the operation of a cycle decolorizing system through a signal output by a chroma detector in the dyeing equipment. The method has the advantages of water and energy conservation, low operation cost and the like.

Description

technical field [0001] The invention relates to a dyeing and soaping method, in particular to a high-temperature soaping method for post-dyeing treatment of reactive dyes. The present invention also relates to the equipment used in the dyeing soaping method, especially the equipment used in the high temperature soaping method of reactive dyeing post-treatment. Background technique [0002] The dyeing process in the textile industry consumes a lot of water, especially in the cotton printing and dyeing industry, which mainly uses reactive dyes. The characteristic of reactive dyes is that a side reaction occurs during the dyeing process to produce hydrolyzed dyes that cannot be fixed. The hydrolyzed dyes will seriously affect the color fastness of the dyed fabrics, and require a large amount of water for high-temperature treatment after dyeing, which is commonly referred to as Soaping, wherein the non-continuous batch dyeing method needs to consume more water and energy for re...

AI Technical Summary

Problems solved by technology

[0006] CN1785854A discloses a treatment and reuse method of high-temperature dyeing wastewater, which is especially suitable for the treatment of high-temperature dyeing wastewater. The treatment method requires large-scale transformation of the original dyeing workshop water supply, drainage pipes, valves, and automatic control systems, which is not conducive to the upgrading and utilization of the existing dyeing workshop

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