Environment-friendly nitrate hanging device

Abstract

The utility model discloses an environmental protection type nitrate hanging device, including nitrate hanging washing tank, circulating tank, electrolytic tank, spray pipe frame, first pump, second pump and third pump, the circulating tank is filled with the nitrate hanging medicine water containing Fe 3+ ; through the cooperation and set nitrate hanging washing tank, circulating tank, electrolytic tank, spray pipe frame, first pump, second pump and third pump, in the production process, can utilize the nitrate hanging medicine water containing Fe 3+ It is continuously nitrate hanging treatment and continuously regenerates to the electroplating frame, replaces traditional concentrated nitric acid nitrate hanging process, and the process of adopting the utility model handles electroplating frame without waste liquid, waste gas, waste residue generation, and is friendly to personnel health, production equipment, environment etc., reduces environmental pollution, is favorable to prolonging equipment service life, and the production process is low in safety risk, and has regenerative system and can be recycled, reduces production cost, and relative concentrated nitric acid nitrate hanging process, adopts the utility model and can improve 30% in income, and brings convenience for production operation.

Description

Technical Field

[0001] This utility model relates to the technology in the field of circuit board manufacturing, and in particular to an environmentally friendly nitrification device. Background Technology

[0002] A printed circuit board (PCB) is a crucial component in electronic devices that supports electronic components and enables their electrical connections (or signal transmission). It replaces traditional wire connections with pre-designed conductive traces (copper foil patterns), making electronic devices more compact and reliable; it is the "skeleton" of the modern electronics industry. PCBs are the cornerstone of the electronics industry, and their design and manufacturing level directly affects the performance, size, and reliability of electronic devices. With the development of technologies such as 5G, AI, and the Internet of Things, the demand for advanced types such as high-frequency, high-speed PCBs, HDI (high-density interconnect) boards, and flexible boards continues to grow, driving the PCB industry towards greater precision and complexity.

[0003] Currently, electroplating is an indispensable process in the production of printed circuit boards (PCBs). During electroplating, PCBs are hung on plating racks, which are then plated with copper. To ensure continuous automated production, these racks also require continuous nitric acid immersion. Existing nitric acid immersion methods commonly use concentrated nitric acid, but this method has several drawbacks: First, concentrated nitric acid releases acid fumes that severely pollute the workshop environment, seriously affecting the health of workers and causing significant corrosion to equipment, impacting its lifespan and stability. Second, the wastewater discharged after nitric acid immersion contains copper and nitrogen, significantly impacting the environment and being highly environmentally unfriendly. Third, the production process carries high safety risks. Furthermore, the lack of a regeneration system leads to high production costs. Therefore, it is necessary to research a solution to address these problems. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide an environmentally friendly nitric acid plating device that can effectively solve the problems of environmental pollution, lack of environmental friendliness, impact on equipment lifespan and stability, high safety risks, and high production costs associated with the existing method of using concentrated nitric acid to perform nitric acid plating on electroplating racks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An environmentally friendly nitrification device includes a nitrification washing tank, a circulation tank, an electrolytic cell, a nozzle frame, a first pump, a second pump, and a third pump; the circulation tank contains Fe... 3+The nitrate solution is disposed of in a circulating tank located outside the nitrate washing tank, which is connected to the bottom of the nitrate washing tank via a first pipe. An electrolytic cell is located outside both the nitrate washing tank and the circulating tank. A nozzle frame is installed within the nitrate washing tank and is equipped with multiple nozzles. The input end of the first pump is connected to the circulating tank via a second pipe, and the output end of the first pump is connected to the input end of the nozzle frame via a third pipe. The input end of the second pump is connected to the circulating tank via a fourth pipe, and the output end of the second pump is connected to the electrolytic cell via a fifth pipe. The input end of the third pump is connected to the electrolytic cell via a sixth pipe, and the output end of the third pump is connected to the circulating tank via a seventh pipe.

[0007] As a preferred embodiment, the nozzle frame includes a vertical pipe and multiple horizontal pipes. The vertical pipe is arranged vertically, its lower end is closed, and its upper end is connected to a third pipe. The multiple horizontal pipes are arranged vertically at intervals, each horizontal pipe extends laterally, each horizontal pipe is connected to the vertical pipe, and each horizontal pipe is provided with multiple nozzles. The multiple nozzles are arranged laterally at intervals, and each nozzle is connected to the horizontal pipe.

[0008] As a preferred embodiment, a first control valve is installed on the first pipeline.

[0009] As a preferred embodiment, a second control valve is provided on the second pipeline, and a third control valve is provided on the third pipeline.

[0010] As a preferred embodiment, a fourth control valve is provided on the fourth pipeline, and a fifth control valve is provided on the fifth pipeline.

[0011] As a preferred embodiment, a sixth control valve is provided on the sixth pipeline, and a seventh control valve is provided on the seventh pipeline.

[0012] As a preferred embodiment, the tail end of the seventh pipe extends into the circulation tank from the top of the circulation tank.

[0013] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0014] By coordinating the installation of a nitrate-soaked water washing tank, a circulation tank, an electrolytic cell, a nozzle frame, a first pump, a second pump, and a third pump, the production process can utilize Fe-containing... 3+This invention provides a continuous nitric acid nitrification treatment and regeneration process for electroplating racks, replacing the traditional concentrated nitric acid nitrification process. The process generates no waste liquid, waste gas, or waste residue, making it more friendly to personnel health, production equipment, and the environment. It reduces environmental pollution, extends equipment lifespan, has low safety risks, and features a regeneration system for recycling, reducing production costs. Compared to the concentrated nitric acid nitrification process, this invention can increase profits by 30%, bringing convenience to production operations.

[0015] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0017] Explanation of reference numerals in the attached diagram:

[0018] 10. Nitrogenation water washing tank; 20. Circulation tank

[0019] 30. Electrolytic cell; 40. Nozzle frame

[0020] 41. Vertical pipe 42. Horizontal pipe

[0021] 401, Nozzle 51, First Pump

[0022] 52. Second pump 53. Third pump

[0023] 61. First pipeline 62. Second pipeline

[0024] 63. Third pipeline 64. Fourth pipeline

[0025] 65. Fifth Pipeline 66. Sixth Pipeline

[0026] 67. Seventh Pipeline; 71. First Control Valve

[0027] 72. Second control valve 73. Third control valve

[0028] 74. Fourth control valve 75. Fifth control valve

[0029] 76. Sixth control valve 77. Seventh control valve

[0030] 80. Electroplating rack. Detailed Implementation

[0031] Please refer to Figure 1As shown, it illustrates the specific structure of an environmentally friendly nitrification hanging device according to a preferred embodiment of the present invention, including a nitrification hanging water washing tank 10, a circulation tank 20, an electrolysis tank 30, a spray pipe frame 40, a first pump 51, a second pump 52, and a third pump 53.

[0032] The circulation tank 20 contains Fe... 3+ The circulating tank 20 is located outside the nitrate washing tank 10. The circulating tank 20 is connected to the inner bottom of the nitrate washing tank 10 through a first pipe 61. The electrolytic cell 30 is located outside the nitrate washing tank 10 and the circulating tank 20. In this embodiment, the height of the circulating tank 20 is lower than the height of the nitrate washing tank 10. The first pipe 61 extends horizontally, with one end connected to the inner bottom of the nitrate washing tank 10 and the other end connected to the middle of the circulating tank 20. This height difference allows the liquid from the nitrate washing tank 10 to flow into the circulating tank 20. A first control valve 71 is provided on the first pipe 61 to control the flow of liquid out of the nitrate washing tank 10.

[0033] The spray pipe frame 40 is installed in the nitrate-soaked water washing tank 10, and multiple nozzles 401 are installed on the spray pipe frame 40. Specifically, the spray pipe frame 40 includes a vertical pipe 41 and multiple horizontal pipes 42. The vertical pipe 41 is installed vertically and its lower end is closed. The multiple horizontal pipes 42 are arranged vertically at intervals, each horizontal pipe 42 extends laterally, and each horizontal pipe 42 is connected to the vertical pipe 41. Multiple nozzles 401 are installed on each horizontal pipe 42, and the multiple nozzles 401 are arranged laterally at intervals. Each nozzle 401 is connected to the horizontal pipe 42.

[0034] The input end of the first pump 51 is connected to the circulation tank 20 through the second pipe 62, and the output end of the first pump 52 is connected to the input end of the nozzle frame 40 through the third pipe. In this embodiment, a second control valve 72 is provided on the second pipe 62, a third control valve 73 is provided on the third pipe 63, and the upper end of the vertical pipe 41 is connected to the third pipe 40.

[0035] The input end of the second pump 52 is connected to the circulation tank 20 via the fourth pipe 64, and the output end of the second pump 52 is connected to the electrolytic cell 30 via the fifth pipe 65. In this embodiment, a fourth control valve 74 is provided on the fourth pipe 64, and the fourth pipe 64 is connected to the inner bottom of the circulation tank 20. A fifth control valve 75 is provided on the fifth pipe 65, and the fifth pipe 65 is connected to the upper middle part of the electrolytic cell 30.

[0036] The input end of the third pump 53 is connected to the electrolytic cell 30 via the sixth pipe 66, and the output end of the third pump 53 is connected to the circulation tank 20 via the seventh pipe 67. In this embodiment, a sixth control valve 76 is provided on the sixth pipe 66, which is connected to the inner bottom of the electrolytic cell 30. A seventh control valve 77 is provided on the seventh pipe 67, and the tail end of the seventh pipe 67 extends into the circulation tank 20 from the top.

[0037] This utility model also discloses an environmentally friendly nitrification process, which uses the aforementioned environmentally friendly nitrification device and includes the following steps:

[0038] (1) Place the electroplating rack 80 that needs to be nitrated into the nitrated water washing tank 10.

[0039] (2) The first pump 51 pumps Fe into the circulation tank 20. 3+ The nitrate solution is delivered through the third pipe 63 to each nozzle 401 of the nozzle frame 40, and each nozzle 401 dispenses Fe-containing solution. 3+ The nitrate solution was sprayed onto the electroplating rack 80.

[0040] (3) In the presence of Fe 3+ Under the action of the nitrate plating solution, the metallic copper on the electroplating rack 80 is oxidized to Cu. 2+ The solution, and the Fe in the nitric acid solution. 3+ Reduced to Fe 2+ Contains Cu 2+ and Fe 2+ The nitrification solution is returned to the circulation tank 20 through the first pipe 61 to complete the nitrification of the copper metal on the electroplating rack 80. The reaction principle is: Fe 3+ (Oxidizing agent) + Cu → Fe 2+ +Cu 2+ .

[0041] (4) The second pump 52 pumps Cu from the circulation tank 20. 2+ and Fe 2+ The nitrate solution is transported to the electrolytic cell 30 through the fifth pipeline 65.

[0042] (5) Contains Cu 2+ and Fe 2+ The nitrate solution is electrolyzed in electrolytic cell 30 by direct current electrolysis to remove Cu 2+ Reduced to metallic copper, while simultaneously reducing Fe 2+ Oxidized to Fe 3+ The reaction principle is as follows: Anode: Fe 2+ -e - →Fe 3+ (Oxidant regeneration); Cathode: Cu 2+ +2e -→Fe 3+ (Copper is extracted by electrolysis.)

[0043] (6) The copper-extracting nitrate solution is pumped by the third pump 53 through the seventh pipeline 67 to the circulation tank 20 to complete the electrolytic copper extraction and Fe extraction. 3+ The regeneration.

[0044] The key design feature of this invention is that, by coordinating the installation of a nitrate-soaked water washing tank, a circulation tank, an electrolytic tank, a spray nozzle frame, a first pump, a second pump, and a third pump, the production process can utilize water containing Fe. 3+ This invention provides a continuous nitric acid nitrification treatment and regeneration process for electroplating racks, replacing the traditional concentrated nitric acid nitrification process. The process generates no waste liquid, waste gas, or waste residue, making it more friendly to personnel health, production equipment, and the environment. It reduces environmental pollution, extends equipment lifespan, has low safety risks, and features a regeneration system for recycling, reducing production costs. Compared to the concentrated nitric acid nitrification process, this invention can increase profits by 30%, bringing convenience to production operations.

[0045] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An environmentally friendly nitrification device, characterized in that: It includes a nitrate-soaked washing tank, a circulation tank, an electrolytic cell, a nozzle frame, a first pump, a second pump, and a third pump; the circulation tank contains Fe... 3+ The nitrate solution is disposed of in a circulating tank located outside the nitrate washing tank, which is connected to the bottom of the nitrate washing tank via a first pipe. An electrolytic cell is located outside both the nitrate washing tank and the circulating tank. A nozzle frame is installed within the nitrate washing tank and is equipped with multiple nozzles. The input end of the first pump is connected to the circulating tank via a second pipe, and the output end of the first pump is connected to the input end of the nozzle frame via a third pipe. The input end of the second pump is connected to the circulating tank via a fourth pipe, and the output end of the second pump is connected to the electrolytic cell via a fifth pipe. The input end of the third pump is connected to the electrolytic cell via a sixth pipe, and the output end of the third pump is connected to the circulating tank via a seventh pipe.

2. The environmentally friendly nitrification device according to claim 1, characterized in that: The nozzle frame includes a vertical pipe and multiple horizontal pipes. The vertical pipe is set vertically and its lower end is closed. Its upper end is connected to a third pipe. The multiple horizontal pipes are arranged vertically at intervals. Each horizontal pipe extends laterally and is connected to the vertical pipe. Each horizontal pipe is equipped with multiple nozzles, which are arranged laterally at intervals. Each nozzle is connected to the horizontal pipe.

3. The environmentally friendly nitrification device according to claim 1, characterized in that: A first control valve is installed on the first pipeline.

4. The environmentally friendly nitrification device according to claim 1, characterized in that: A second control valve is installed on the second pipeline, and a third control valve is installed on the third pipeline.

5. The environmentally friendly nitrification device according to claim 1, characterized in that: A fourth control valve is installed on the fourth pipeline, and a fifth control valve is installed on the fifth pipeline.

6. The environmentally friendly nitrification device according to claim 1, characterized in that: A sixth control valve is installed on the sixth pipeline, and a seventh control valve is installed on the seventh pipeline.

7. The environmentally friendly nitrification device according to claim 1, characterized in that: The tail end of the seventh pipe extends into the circulation tank from the top of the circulation tank.

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