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Alkaline development plate punching waste water treating method and development treating method of planographic plate material

A lithography, wastewater treatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increased conductivity of wastewater, unsatisfactory precipitation effect, and unusable use. , to achieve the effect of long service life, good electrolysis effect and convenient maintenance

Inactive Publication Date: 2012-08-15
XINGRAPHICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using these methods, it is necessary to control the type and amount of chemicals added. When the wastewater is circulating, the sedimentation effect is often not very ideal.
On the other hand, these methods cannot avoid the accumulation of soluble ion concentration in the wastewater, which leads to the continuous increase of the conductivity of the wastewater, so that it cannot continue to be used

Method used

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  • Alkaline development plate punching waste water treating method and development treating method of planographic plate material
  • Alkaline development plate punching waste water treating method and development treating method of planographic plate material
  • Alkaline development plate punching waste water treating method and development treating method of planographic plate material

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Embodiment 1

[0064] As a preferred embodiment of the present invention, the present invention discloses a method for treating alkaline developing plate-washing wastewater of lithographic printing plates, comprising the following steps:

[0065] (1) In the electrolytic cell separated by the cationic membrane 14, through the effect of direct current, the alkaline developing plate-washing wastewater is electrolyzed at the anode of the electrolytic cell to produce acid or metal ions to neutralize the alkaline developing plate-washing wastewater Alkali or basic salt, so that the basic salt forms a precipitate together with the organic resin and colored dye dissolved in the alkaline developing plate wastewater;

[0066] (2) filter the precipitate formed;

[0067] (3) The filtered clean water is returned to the developing and flushing unit 3 for recycling.

Embodiment 2

[0069] As another preferred embodiment of the present invention, the present invention discloses a method for developing and treating lithographic printing plates, including the step of developing and treating the offset lithographic printing plates, and performing the rinsing process on the developed printing plates. step, the step of carrying out glue preservation and drying treatment on the washed printing plate, and also includes a method for treating alkaline developing plate-washing wastewater, the method comprising:

[0070] (1) In the electrolytic cell separated by the cationic membrane 14, through the effect of direct current, the alkaline developing plate-washing wastewater is electrolyzed at the anode of the electrolytic cell to produce acid or metal ions to neutralize the alkaline developing plate-washing wastewater Alkali or basic salt, so that the basic salt forms a precipitate together with the organic resin and colored dye dissolved in the alkaline developing pl...

Embodiment 3

[0074] As another preferred embodiment of the present invention, the present invention discloses a wastewater treatment device for alkaline development of lithographic printing plates, including an electrolytic cell separated by a cationic membrane 14, an anode electrode, a cathode electrode, and a direct current generator 7. Filtration pump 10 and filter device 11; wherein, in the electrolytic cell separated by cationic membrane 14, cationic membrane 14 divides the electrolytic cell into two electrolytic cells of negative and positive, and the positive electrode is arranged in the positive electrolytic cell 9, and the positive electrode is arranged in the positive electrolytic cell 9. The electrode is arranged in the negative electrolytic cell 8, the anode of the direct current generator 7 is connected to the positive electrode, the negative electrode of the direct current generator 7 is connected to the negative electrode, one end of the filter pump 10 is connected to the nega...

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Abstract

The invention discloses an alkaline development plate punching waste water treating method and a development treating method of a planographic plate material, and relates to the technical field of a treating method and device for plate punching waste water after development during the plate manufacturing process in which an alkaline development liquid is used for development treatment of the planographic plate material. The method comprises the following steps: (1) electrolyzing alkaline development plate punching waste water at the anode part of an electrolyzer separated by a cation membrane through the effect of direct-current electricity, generating acid or metal ions, and neutralizing alkaline or alkaline salt, thus the alkaline salt and organic resin as well as coloring dye which are dissolved in the alkaline development plate punching waste water are precipitated to form sediments; (2) carrying out filtering treatment on the formed sediments; and (3) returning the clean water after filtering treatment to a development washing unit for recycling. The method has simple steps and is easy to operate, the treated waste water can reach the quality same with the fresh water, and can be maintained for use for a long cycle.

Description

[0001] technical field [0002] The invention relates to the technical field of a method and equipment for treating plate-washing wastewater after development in the plate-making process of lithographic printing plate material developed by alkaline developer, and the technical field of development treatment of lithographic printing plate material. Background technique [0003] Offset lithographic printing plate making involves two processes of exposure and development. Exposure is to use controlled specific light or radiation to act on the lithographic printing plate, thereby forming a latent image on the surface imaging coating material of the lithographic printing plate. After the exposure of the lithographic printing plate, the exposed area and the unexposed area of ​​the surface coating material have different dissolution characteristics in the corresponding developer, so the corresponding developer can be used to develop the exposed lithographic printing plate. Form the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461G03F7/30
Inventor 黎仕友袁文川杨志荣朱军刚李正国陈刚
Owner XINGRAPHICS CO LTD
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