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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

Inactive Publication Date: 2003-11-26
SHANGHAI BANKNOTE PRINTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Neutralization treatment site environment is poor, easy to cause secondary pollution

Method used

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

Examples

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Embodiment Construction

[0013] As shown in Fig. 1, a new type of banknote printing gravure waste water treatment and reuse process flow chart of the present invention, mainly consists of wiper waste liquid tank 1, lift pump 2, banknote printing gravure waste water pretreatment solid-liquid centrifugal separator 3 in sequence Concentrated liquid solid-liquid centrifugal separator 4, concentrated liquid re-concentrated solid-liquid centrifugal separator 5, ultrafiltration membrane concentrated liquid receiving tank 6, concentrated liquid receiving tank 7, slag discharge tank 8, and ultrafilter 9 devices.

[0014] Working process of the present invention is as follows:

[0015] The wiper waste liquid containing solid phase (machine waste water) enters the wiper waste liquid tank 1 through the pipeline for collection, and is boosted by the lift pump 2 to output a stable value of pressure and flow rate wiper waste liquid to the banknote printing gravure The solid-liquid centrifugal separator 3 for wastewa...

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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.

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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Application Information

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IPC IPC(8): C02F1/38C02F1/44
Inventor 吴亚复郁学云季斌阎安田卫东
Owner SHANGHAI BANKNOTE PRINTING
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