Method and device for purifying and recycling chromium electroplating solution and waste solution thereof

A technology for purifying device and chrome plating solution, applied to cells, electrolysis process, electrolysis components, etc., can solve the problems of limited chrome plating tank capacity, tank liquid pollution, accelerated accumulation of metal impurities, etc. The effect of saving production costs

Active Publication Date: 2009-11-18
东莞庞思化工机械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the recovered solution is directly replenished back to the chromium plating tank, it will definitely accelerate the accumulation of metal impurities. Once these metal impurities accumulate to a certain level, it will affect the quality of chrome plating, and eventually cause the entire tank solution to be scrapped, and the waste liquid must still be treated before it can be reused. Discharge
[0004] In the past, some people used bisque pot electrolysis to treat the chromium plating bath, hoping to remove various metal impurities, but the results showed that this method was not thorough, and the efficiency was low, and it often caused sulfuric acid in the...

Method used

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  • Method and device for purifying and recycling chromium electroplating solution and waste solution thereof
  • Method and device for purifying and recycling chromium electroplating solution and waste solution thereof
  • Method and device for purifying and recycling chromium electroplating solution and waste solution thereof

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Embodiment 1

[0037] Such as image 3 As shown, the device for realizing the purification and reuse method of the chromium plating solution includes: a chromium solution storage tank 4, a purification device buffer tank 5, a cationic resin column 6, a concentration device 7 and a PLC controller; a chromium solution storage tank 4 The pipelines are respectively connected to the first recovery tank 2 and the electroplating tank 1 in the electroplating production line. The chromium solution storage tank 4 is connected to the buffer tank 5 of the purification device through a pump and pipeline, and the buffer tank 5 of the purification device is connected to the cation through a pump and a valve. Resin column 6 is connected, cationic resin column 6 is connected with concentrator 7 by pipeline, sulfuric acid tank 8 is connected to cationic resin column 6 by the pipeline that is connected with pump and valve, and concentrator 7 is connected by the pipeline that is connected with valve and flow met...

Embodiment 2

[0042] After the workpiece is chrome-plated in the electroplating tank 1, the workpiece brings the chromium plating solution into the first recovery tank 2. After the solution in the first recovery tank 2 is measured by the conductivity meter to 10 g / liter of chromic acid, control the solenoid valve for adding water, and add water to the second recovery tank. Groove 3, the water of the second recovery tank 3 overflows to the first recovery tank 2, and then the solution of the first recovery tank 2 overflows to the chrome solution storage tank 4;

[0043] After the terminal liquid level instrument measures that the solution in the chromium solution storage tank 4 reaches 80% of the volume, the PLC controller sends the solution in the chromium solution storage tank 4 in batches and quantitatively to the purification device for processing according to the concentration of the solution. Exchange the resin, pump the solution to be purified into the buffer tank 5 of the purification ...

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Abstract

The invention discloses a method and a device for purifying and recycling a chromium electroplating solution and a waste solution thereof. The method directionally solves the problem of metal pollutions and comprises the following steps: adopting a purification apparatus to effectively eliminate various harmful metallic impurities such as copper, zinc, nickel, iron and the like; concentrating the solution after the purification; and finally recycling the solution into an electroplating bath, wherein the recycling rate reaches more than 95 percent. Simultaneously, through an automatic control system, the electroplating bath, a recovery tank, the purification apparatus, a concentrating device, an analysis meter and the like are combined together organically to achieve full automatic operation. The method and the device solve the problem that the chromium electroplating solution cannot be recycled in clean production for years in China. The method avoids a large quantity of chromium-containing wastewater discharges, effectively saves additional supplementation of chromic anhydride at the same time, and obtains double produce effects of recycling economy and clean production.

Description

technical field [0001] The invention relates to a method for purifying and recycling an electroplating solution, in particular to a method and a device for purifying and recycling a chromium plating solution and its waste solution. Background technique [0002] Chromic anhydride is a chemical raw material that is widely used in the electroplating industry and has high waste water treatment costs. In the traditional chromic acid chromium plating process, since the chromium plating solution is brought out with the workpiece during production, it is usually necessary to set up 3 to 4 chromium solution recovery tanks behind the electroplating tank to reduce the discharge of chromium-containing wastewater after treatment, although part of the recovery solution Return to the plating tank, but as the concentration of impurities in the recovery tank increases, the recovered chromium solution still needs to be treated before it can be discharged. [0003] For a long time, there is n...

Claims

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Application Information

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IPC IPC(8): C25D21/22
Inventor 黄广炳
Owner 东莞庞思化工机械有限公司
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