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Cleaning agent used for cleaning bank note printing plate waste liquor contamination and cleaning condition

A technology of waste liquid pollution and cleaning agent, applied in detergent compositions, non-surface-active detergent compositions, chemical instruments and methods, etc., can solve the problems of cumbersome cleaning steps and the like

Inactive Publication Date: 2003-12-03
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A Chinese patent (application number: 00129852.6) once disclosed a cleaning method that uses acid-base alternation combined with soft water cleaning. The cleaning effect is good, but the cleaning steps of this method are relatively cumbersome. The special cleaning agent and corresponding cleaning conditions for liquid-contaminated ultrafiltration membrane can simplify the cleaning steps and save the cost of cleaning agents, which has great practical significance

Method used

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  • Cleaning agent used for cleaning bank note printing plate waste liquor contamination and cleaning condition
  • Cleaning agent used for cleaning bank note printing plate waste liquor contamination and cleaning condition
  • Cleaning agent used for cleaning bank note printing plate waste liquor contamination and cleaning condition

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Embodiment

[0023] use figure 1 For the cleaning equipment shown, the hollow fiber ultrafiltration membrane used is polysulfone blend material, and the membrane area of ​​the module is 4m 2 .

[0024] The cleaning agent used is prepared in the cleaning agent preparation tank 1 according to the following ratio: 1.0% sodium hydroxide (NaOH); 0.8% disodium ethylenediaminetetraacetic acid (EDTA 2 Na); 0.5% sulfonated castor oil; 97.7% deionized water.

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Abstract

A detergent for washing the superfilter membrane polluted by the sewage of paper money printing plate during recovering it contains NaOH (0.5-1.0%), EDTA2Na (0.5-2.5%), sulfonated castor oil (0.3-1.0%) and deionized water (95.0-98.5%). Its washing conditions are 45-70 deg.C, 0.08-0.15 MPa and 15-60 min.

Description

technical field [0001] The invention relates to a cleaning agent formula and corresponding cleaning conditions, in particular to a cleaning agent and cleaning conditions for cleaning ultrafiltration membranes polluted by banknote printing and plate wiping waste liquid. Background technique [0002] In the process of ultrafiltration treatment of banknote printing and plate wiping waste liquid, ink particles are trapped, and most of the permeate (mainly including deionized water, NaOH (~10g / L) and surfactant (~5g / L)) It can be returned to the printing unit with minor adjustments. However, with the increase of running time, especially when the pretreatment is poor, intermittent operation and cleaning are not timely, the membrane flux drops seriously. It is difficult to restore the membrane flux simply by cleaning with acid or alkali. Therefore, it is particularly important to study the membrane fouling problem in the ultrafiltration process of printing banknote wiping waste l...

Claims

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Application Information

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IPC IPC(8): C11D7/32
Inventor 刘忠洲张国俊
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI