Continuous reverse extraction system

Abstract

The invention provides a continuous reverse extraction system. The system is in fluid connection with an extraction system. The continuous reverse extraction system comprises a reverse extraction mixing device, a separating device and a stripping agent storage device, wherein the reverse extraction mixing device is in fluid connection with the extraction system, and is used for receiving color oildischarged by the extraction system, the separating device is separately in fluid connection with the reverse extraction mixing device, a dye collecting device and a net oil collecting device, and the reverse extracting agent storage device is in fluid connection with the reverse extraction mixing device, and is used for providing a stripping agent for the reverse extraction mixing device.

Description

technical field [0001] The invention relates to the field of printing and dyeing wastewater treatment, in particular to a continuous stripping system used in the process of decolorization and reuse of residual dyeing baths. Background technique [0002] Reactive dyes are the most commonly used dyes for cotton dyeing because of their bright colors, good fastness, low price, and easy use. However, during the dyeing process, a considerable part (about 30%) of reactive dyes will be hydrolyzed. In order to make the hydrolyzed dye easy to wash off after dyeing and prevent the dye fastness from being attached to the cotton fiber, the molecular structure of the reactive dye is designed to have a low affinity to the cotton fiber. This molecular structure reduces the adsorption of reactive dyes to fibers during the dyeing process, which affects the use efficiency of dyes. [0003] In order to enable reactive dyes to effectively dye cotton fibers, a large amount of salt must be added...

AI Technical Summary

Problems solved by technology

However, in this decolorization system, due to the fact that the tubular membrane is often clogged during use, the flow rate of the treatment is reduced, and it must be flushed frequently to recover.

Therefore, although the system can achieve

Images