Heavy metal zero discharge system of electroplating rinse water, and recovery method of rinse water

A technology for rinsing water and heavy metals, applied in chemical instruments and methods, light water/sewage treatment, water/sewage multi-stage treatment, etc. Pollute the environment, reduce operating costs, and be beneficial to environmental protection

Active Publication Date: 2014-07-23
廊坊天正通自动化设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the rinsing water of the electroplating production line is usually directly discharged to the sewage treatment station for treatment, but the cost of the electroplating solution increases, the water consumption of the production line is large, the amount of sewage treatment is large, and the sewage treatment station occupies a large area. The construction, use and maintenance of sewage stations are costly, unfavorable to environmental protection and other shortcomings. At present, there is no effective way to solve this problem

Method used

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  • Heavy metal zero discharge system of electroplating rinse water, and recovery method of rinse water

Examples

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Effect test

Embodiment 1

[0044] Take the rinse water recovery system of a chrome plating production line as an example:

[0045] Such as figure 1 As shown, it includes a pre-treatment rinse water treatment system, a nickel rinse water treatment system and a chromium rinse water treatment system arranged side by side, and the pre-treatment rinse water treatment system is used for rinsing, neutralization, filtration and evaporation of the pre-treatment rinse water Afterwards, the evaporated dope is discharged into the sewage treatment station 9, and the flash water produced in the evaporation process and the ultrafiltration water produced by filtration are discharged into the collecting device; the nickel rinse water treatment system and the chromium rinse water treatment system are respectively used After rinsing and evaporating with the respective rinsing water, the evaporated concentrated liquid is recovered separately, and the flash water generated during the evaporation process is discharged into t...

Embodiment 2

[0071] Take the rinse water recovery system of the galvanizing production line as an example:

[0072] The difference between this embodiment and Embodiment 1 is that the rinse water recovery system of the galvanizing production line only includes a pre-treatment rinse water treatment system and a zinc rinse water treatment system, and does not require an intermediate rinse water treatment system. Nickel, so galvanizing omits a process step compared with chrome plating in the treatment process.

[0073] The invention is mainly used for chrome plating, cadmium plating, zinc plating, cyanide electroplating and other highly harmful heavy metal plating species.

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Abstract

The invention relates to the technical field of wastewater recovery, and discloses a heavy metal zero discharge system of electroplating rinse water. The heavy metal zero discharge system comprises a pretreated rinse water treatment system, a second rinse water treatment system and/or a third rinse water treatment system which are arranged in parallel, and the pretreated rinse water treatment system is used for rinsing pretreated rinse water, neutralizing, filtering, evaporating, discharging the obtained evaporation concentrate into a sewage treatment station, and discharging flash evaporation water generated in the evaporation process and ultra-filtered water generated in the filtration process into a collection device; and the second rinse water treatment system and/or the third rinse water treatment system are/is used for rinsing rinse waters, evaporating, respectively recovering the obtained evaporation concentrates, discharging flash evaporation water generated in the evaporation process into the collection device, carrying out ion exchange and ultraviolet sterilization together, and recycling the obtained ion-exchanged and ultraviolet-sterilized solution. The invention also relates to a recovery method of the rinse water. In the invention, the utilization rate of the electroplating rinse water is improved, the discharge of the electroplating rinse water is reduced, and the treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of waste water recovery, in particular to a system for zero discharge of heavy metals in electroplating rinsing water and a method for recovering rinsing water. Background technique [0002] Before electroplating, the electroplating production line needs to carry out the cleaning of the plated parts, that is, the pre-treatment process of the plated parts. Metals, such as chromium plating, need to be nickel-plated first, and then chrome-plated after nickel-plating is completed; there are also some electroplating processes that can directly plate the required metal on the surface of the workpiece after pre-treatment, such as galvanization. [0003] In the prior art, the rinsing water of the electroplating production line is usually directly discharged to the sewage treatment station for treatment, but the cost of the electroplating solution increases, the water consumption of the production line is large, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/42C02F1/32C02F1/44C02F103/16
Inventor 张玉峰
Owner 廊坊天正通自动化设备有限公司
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