Process for treating and reutilizing bank-note gravure printing waste water

A technology for wastewater treatment and process method, which is applied in the directions of centrifugal separation water/sewage treatment, permeation/dialysis water/sewage treatment, etc. Flux, reduce membrane fouling effect
CN1458073AInactive Publication Date: 2003-11-26SHANGHAI BANKNOTE PRINTING +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI BANKNOTE PRINTING
Publication Date
2003-11-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The technological process of treating bank note gravure printing waste water includes supergravitational solid-liquid separation and ultrafiltering. The technological process is performed with ultrafilter, supergravitational centrifugal solid-liquid separator as the pre-treatment apparatus and other relevant apparatus. The said technological process can optimize the operation environment of theultrafilter and reduce the post-treatment of ultrafiltered concentrated liquid, and has high recovering rate of plate cleaning liquid and high system operation efficiency.
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Description

Technical field

[0001] The invention relates to a process for treating and reusing banknote printing gravure wastewater, which relates to a process for treating and reusing wastewater, in particular to an improved process for treating and reusing banknote printing gravure wastewater. Background technique

[0002] Banknote printing gravure printing wastewater is the ink-containing wastewater formed by cleaning the color ink roller with wiping solution during the banknote printing process. Wastewater mainly contains: pigments, fillers, binders, resin oils, surfactant sodium hydroxide, etc., of which wiping solution accounts for 98.3-98.5%. The treatment of gravure printing wastewater mainly includes two parts: separating a very small amount of solid matter and the remaining waste containing ink concentrate (retaining liquid) from the wastewater, and extracting and recovering the wiping solution (main component: soluble sodium hydroxide) to the maximum extent. , surfactant and...

Claims

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