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Source reduction complete technology method for heavy metal water pollutants in zinc electrolytic process

A technology for water pollutants and heavy metals, applied in the electrolysis process, electrolysis components, photography technology, etc., can solve the problems of large amount of heavy metal wastewater, low electrolysis efficiency, and large labor load

Active Publication Date: 2015-12-09
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a complete set of technical methods for reducing heavy metal water pollutants in the zinc electrolysis process. , low electrolysis efficiency and other issues, the most critical point is that this method is aimed at the complexity of the production process of heavy metal wastewater in the zinc electrolysis workshop, which has many sources, large area, long process, strong mobility, and spatial divergence. Principle, successfully fundamentally its source reduction technology of one-time overall solution, completely canceling the bubble plate tank that has been used in the electrolytic zinc industry for more than 100 years, making it a history

Method used

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  • Source reduction complete technology method for heavy metal water pollutants in zinc electrolytic process
  • Source reduction complete technology method for heavy metal water pollutants in zinc electrolytic process
  • Source reduction complete technology method for heavy metal water pollutants in zinc electrolytic process

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Embodiment 1

[0031] Such as figure 1 shown, including the following steps:

[0032] (1) Liquid phase source reduction: The 600 mm × 800 mm cathode plate electrolyzed in a 24-hour cycle is lifted from the electrolyte. During the process of lifting the cathode plate from the electrolyte, brushes are used to tightly close the zinc skin surface attached to the cathode plate. fit brush;

[0033] There is a 5cm-thick thin metal layer deposited on the surface of the cathode plate, which is called the zinc skin. Affected by other factors during the electrolysis process, the metallic zinc deposited on the surface of the zinc skin is uneven and rough, resulting in local high or low-lying parts. , during the electrolysis process of the cathode plate, a large amount of entrained liquid on the surface of the cathode plate is the initial liquid phase source of heavy metals in the cleaning wastewater of the electrolysis workshop. A certain thickness of zinc skin is deposited on both sides of the cathode...

Embodiment 2

[0040] Such as figure 1 shown, including the following steps:

[0041] (1) Liquid phase source reduction: The 650 mm × 800 mm cathode plate electrolyzed in a 24-hour cycle is lifted from the electrolyte, and the zinc skin surface attached to the cathode plate is tightly pressed with a brush during the process of lifting the cathode plate from the electrolyte. fit brush;

[0042] There is a 4cm-thick thin metal layer deposited on the surface of the cathode plate, which is called zinc skin. Affected by other factors during the electrolysis process, the metal zinc deposited on the surface of the zinc skin is uneven and rough, resulting in local high or low-lying parts. , during the electrolysis process of the cathode plate, a large amount of entrained liquid on the surface of the cathode plate is the initial liquid phase source of heavy metals in the cleaning wastewater of the electrolysis workshop. A certain thickness of zinc skin is deposited on both sides of the cathode plate...

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Abstract

The invention relates to a source reduction complete technology method for heavy metal water pollutants in a zinc electrolytic process. The method comprises three cleaner production technologies of liquid phase source reduction, solid phase source reduction and cleaning wastewater total quantity reduction of heavy metal wastewater of an electrolytic plant, and five key apparatus technologies, so that a complete technology method which integrates cell leaving cathode plate in-situ carrying liquid brushing and collection, intelligent zinc sulfate identification and dry method removal, efficient needle spray cleaning, combined plate stripping, intelligent dirty plate identification and sorting, flexible deformation plate identification and sorting, shaping, polishing and high-precision cell entrance is realized. According to a cleaner production key core technology which is developed by a cleaner production path of source control, process reduction and cyclic utilization, and a high-tech practical apparatus technology which is matched with the core technology, over 85% of cell leaving cathode plate carrying liquid is reduced; over 99% of zinc sulfate crystal substances are reduced; over 82% of cleaning wastewater yield is reduced; the complete cycle utilization of the zinc sulfate crystal substances and zinc-containing cleaning water is realized; and no heavy metal wastewater effluent processing is realized.

Description

technical field [0001] The invention relates to a method for reducing heavy metal water pollutants, in particular to a complete set of technical methods for reducing heavy metal water pollutant sources during zinc electrolysis, belonging to the field of electrolysis workshops in the hydrometallurgical electrolytic zinc industry. Background technique [0002] Zinc is an important basic material of the national economy and plays an important role in the fields of aerospace and military industry. my country's zinc production and consumption have ranked first in the world for decades. While the electrolytic zinc industry has made great contributions to the national economy, it has also caused serious environmental pollution and ecological damage. [0003] Since the birth of the electrolytic zinc industry in the early 20th century, foam plate tanks have been the standard configuration of electrolytic workshops in this industry, and they are also the largest source of heavy metal...

Claims

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Application Information

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IPC IPC(8): C25C7/08C25C7/06C25C1/16
CPCY02P10/20
Inventor 段宁降林华徐夫元
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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