A metal impurity on-line adsorption equipment for trivalent chromium plating bath

Abstract

The utility model relates to a metal impurity on -line adsorption equipment for trivalent chromium plating bath liquid relates to electroplating liquid regeneration technical field, including electrolytic cell, resin tower and filter machine connected in proper order through adsorption pipeline, and electrolytic cell and filter machine are connected with trivalent chromium main tank through adsorption pipeline respectively, one side of resin tower is provided with the resin backflushing purification device connected with it, the utility model discloses through the design of multichannel adsorption and the synergistic effect of different adsorption processes, can efficiently remove various metal impurities in trivalent chromium plating bath liquid, effectively improves the quality of electroplating layer, reduces the rate of defective product.

Description

Technical Field

[0001] This utility model relates to the field of electroplating solution regeneration technology, and in particular to an online adsorption device for metal impurities in trivalent chromium electroplating baths. Background Technology

[0002] In the production process of trivalent chromium electroplating, metallic impurities in the plating bath can severely impact the plating quality. These impurities may originate from workpiece dissolution, rack corrosion, and environmental pollution during the electroplating process. As electroplating continues, metallic impurities accumulate in the plating bath. When the content of metallic impurities exceeds a certain limit, it can lead to defects in the plating layer such as uneven color, reduced adhesion, pinholes, and pitting, seriously affecting the appearance and performance of the product, reducing the product's pass rate and market competitiveness.

[0003] Currently, the main methods for treating metallic impurities in trivalent chromium plating baths include chemical precipitation, ion exchange resin methods, and electrolysis. However, chemical precipitation generates a large amount of chemical sludge, resulting in high subsequent treatment costs and a high risk of secondary pollution; ion exchange resin methods require regular resin replacement, making operation cumbersome and costly; and electrolysis consumes a lot of energy, requires complex equipment, and has limited effectiveness in removing certain metallic impurities. Therefore, there is a need for an efficient, convenient, economical, and environmentally friendly online adsorption device to address the problem of metallic impurities in trivalent chromium plating baths. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online adsorption device for metal impurities in trivalent chromium plating bath. Through the design of multiple adsorption channels and the synergistic effect of different adsorption processes, it can efficiently remove various metal impurities in trivalent chromium plating bath, effectively improve the quality of the plating layer, and reduce the defect rate.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An online adsorption device for metal impurities in a trivalent chromium electroplating bath includes an electrolytic cell, a resin tower, and a filter connected sequentially via adsorption pipelines. The electrolytic cell and the filter are connected to the main trivalent chromium plating bath via adsorption pipelines. A resin backwashing purification device is connected to one side of the resin tower. The electrolytic cell treats the electroplating bath based on the electrochemical reaction mechanism of the electrolytic cell, using an external current to drive impurity removal and bath purification. The resin tower treats the electroplating bath based on the selective adsorption mechanism of ion exchange resin for heavy metals, achieving bath purification. The resin backwashing purification device allows for the reuse of adsorption materials, reducing the frequency of material replacement and lowering operating costs. The filter separates impurities through physical interception, improving the bath treatment effect. It typically uses multi-layer filter media (such as filter bags, wound filter cartridges, microporous membranes, etc.) for step-by-step interception filtration. The trivalent chromium electroplating bath solution in the main trivalent chromium plating bath passes through multiple adsorption stages via the adsorption pipelines, sequentially through the electrolytic cell, resin tower, and filter, and finally returns to the main trivalent chromium plating bath via the adsorption pipelines.

[0007] Preferably, a detection port is provided on the adsorption pipeline on one side of the filter outlet, and an online detection module is provided at the detection port to detect various parameters of the electroplating solution after adsorption.

[0008] Preferably, the online detection module includes at least a pH detection unit, a temperature detection unit, and a heavy metal detection unit. The detection units are corresponding sensors used to detect the pH value, temperature, and heavy metal content of the electroplating solution after adsorption, thereby detecting the adsorption effect of the online adsorption equipment and controlling the operation of the electrolytic cell, resin tower, and filter, such as whether the electrolytic cell needs to be fed, whether the resin tower needs to be backwashed, and whether the filter media of the filter needs to be cleaned or replaced.

[0009] Preferably, an automatic feeder is provided on one side of the electrolytic cell and connected thereto. The automatic feeder automatically feeds the electrolytic cell, and after being fully dissolved and adsorbed by the equipment, the contents enter the trivalent chromium main tank, ensuring the purity of the tank solution and avoiding contamination of the tank solution due to external factors.

[0010] The beneficial effects of this utility model are as follows: 1. Through the design of multiple adsorption channels and the synergistic effect of different adsorption processes, various metal impurities in the trivalent chromium electroplating bath can be efficiently removed, effectively improving the quality of the electroplated layer and reducing the defect rate.

[0011] 2. It enables online adsorption of electroplating bath solution while processing and production are underway, eliminating the need for frequent shutdowns. This ensures the stability and safety of the electroplating bath solution during circulation, helps maintain production continuity, and improves production efficiency.

[0012] 3. Real-time monitoring via online detection module enables precise matching of the adsorption process with the electroplating bath conditions, significantly improving adsorption efficiency and purification stability while reducing manual intervention costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Explanation of key component symbols in the diagram: 11. Trivalent chromium main tank;

[0015] 21. Electrolytic cell; 22. Resin tower; 23. Filter; 24. Resin backwashing and purification device; 25. Automatic feeder; 26. Detection port; 27. Online detection module;

[0016] 100. Adsorption pipeline. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0018] Example 1: As Figure 1 As shown, an online adsorption device for metal impurities in a trivalent chromium electroplating bath includes an electrolytic cell 21, a resin tower 22, and a filter 23 connected in sequence via an adsorption pipeline 100. The electrolytic cell 21 and the filter 23 are respectively connected to the trivalent chromium main tank 11 via the adsorption pipeline 100.

[0019] A resin backwashing and purification device 24 is connected to one side of the resin tower 22.

[0020] Example 2: Combination Figure 1 As shown, based on Embodiment 1, a detection port 26 is provided on the adsorption pipeline 100 on the outlet side of the filter 23, and an online detection module 27 is provided at the detection port 26.

[0021] The line detection module 27 includes at least a pH detection unit, a temperature detection unit, and a heavy metal detection unit.

[0022] Example 3: Combination Figure 1 As shown, based on Embodiment 2, an automatic feeder 25 connected to one side of the electrolytic cell 21 is provided.

[0023] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. The present utility model can be used in similar products. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. An online adsorption device for metal impurities in a trivalent chromium electroplating bath, characterized in that: It includes an electrolytic cell (21), a resin tower (22) and a filter (23) connected in sequence through an adsorption pipeline (100). The electrolytic cell (21) and the filter (23) are respectively connected to the trivalent chromium main tank (11) through the adsorption pipeline (100). A resin backwashing purification device (24) is connected to one side of the resin tower (22).

2. The online adsorption device for metal impurities in a trivalent chromium electroplating bath according to claim 1, characterized in that: A detection port (26) is provided on the adsorption pipeline (100) on the outlet side of the filter (23), and an online detection module (27) is provided at the detection port (26).

3. The online adsorption device for metal impurities in a trivalent chromium electroplating bath according to claim 2, characterized in that: The line detection module (27) includes at least a pH detection unit, a temperature detection unit, and a heavy metal detection unit.

4. The online adsorption device for metal impurities in a trivalent chromium electroplating bath according to claim 3, characterized in that: An automatic feeder (25) is connected to one side of the electrolytic cell (21).

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