Process for treating and reutilizing bank-note gravure printing waste water
A technology of wastewater treatment and process method, which is applied in the field of wastewater treatment and reuse process, and the field of money printing and gravure printing wastewater treatment and reuse. Cycle and life, the effect of simplifying the post-processing process
Inactive Publication Date: 2005-05-25
SHANGHAI BANKNOTE PRINTING +1
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Neutralization treatment site environment is poor, easy to cause secondary pollution
Method used
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[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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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. The technical method of banknote printing gravure wastewater treatment and reuse adopts ultrafilter and ultragravity solid-liquid centrifugal separator for separation, and a solid-liquid separator is added as the pretreatment equipment of ultrafiltration in the wastewater treatment and reuse process. The process adopts an ultrafilter, a supergravity solid-liquid centrifugal separator and related processing equipment to extract and reuse the plate wiping liquid in the gravure printing wastewater and to treat the retained liquid up to the standard. On the one hand, it can effectively optimize the operating environment of the existing ultrafilter, reduce membrane fouling, significantly increase its flux, and prolong the cleaning cycle and life of the ultrafiltration membrane. At the same time, it can greatly reduce the amount of follow-up treatment of the ultrafiltration concentrate, simplify the follow-up treatment process of the ultrafiltration membrane concentrate, thereby improving the recovery rate of the plate wiping solution and the operating efficiency of the entire system.
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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IPC IPC(8): C02F1/38C02F1/44
Inventor 吴亚复郁学云季斌阎安田卫东
Owner SHANGHAI BANKNOTE PRINTING