Regeneration equipment for nitric acid stripping waste liquid

Abstract

The utility model discloses regeneration equipment for nitric acid stripping waste liquid, and relates to the technical field of nitric acid stripping liquid regeneration, the regeneration equipment comprises a bottom plate and a working box, the working box is fixedly arranged at the upper end of the bottom plate, a copper ion exchange membrane is arranged in the working box, the working box is divided into a reaction tank and an electrolytic tank through the copper ion exchange membrane, and the reaction tank is connected with the electrolytic tank. Lifting mechanisms are arranged on the left side and the right side of the rear end of the working box, the output ends of the lifting mechanisms are connected with electrolysis plates, a first circulating water pump and a second circulating water pump are symmetrically arranged at the front end of the working box, and a nitric acid shielding reagent box and a nitric acid solution shielding reagent box are arranged at the left end and the right end of the working box correspondingly; according to the device, waste liquid medicine is recycled after being regenerated, in the whole production process, no waste water or dangerous waste gas is generated, only trace acid gas is generated during electrolysis through online regeneration equipment, no yellow smoke is generated, meanwhile, metal copper with very high purity is recycled, cyclic regeneration is achieved, and very high economic value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitric acid type stripping liquid regeneration, in particular to a regeneration device for nitric acid stripping waste liquid. Background Art

[0002] Printed circuit boards are one of the basic electronic component products and have become an indispensable electronic component product for electronic equipment. Among them, the electroplating process is also an important production step in the PCB industry. Since the hanger needs to be used repeatedly, the coating on the hanger must be completely stripped when plating one batch of plated parts before the next batch of plated parts, otherwise the plating solution will be contaminated. The hanger is generally made of titanium, and the stripping solution used for PCB copper plating wire is nitric acid.

[0003] The main components of the stripping waste liquid are nitric acid and copper nitrate. The traditional method is to neutralize it with sodium hydroxide to obtain copper oxide precipitate (since sodium hydroxide reacts with it to obtain copper hydroxide precipitate, but a large amount of heat is released during acid-base neutralization, and it becomes copper oxide). The reaction releases a large amount of heat and also produces irritating fumes. The wastewater produced is sodium nitrate, and nitrate ions are prohibited from being discharged in water discharge standards and are extremely difficult to degrade in wastewater treatment, thereby causing secondary pollution. The copper mud has many impurities. Based on this, this scheme provides a regeneration device for nitric acid stripping waste liquid to solve the above-mentioned problems. Utility Model Content

[0004] In order to solve the above technical problems, a regeneration device for nitric acid stripping waste liquid is provided. This technical solution solves the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A regeneration device for nitric acid stripping waste liquid comprises a bottom plate and a working box, wherein the working box is fixedly mounted on the upper end of the bottom plate, a copper ion exchange membrane is arranged inside the working box, the working box is divided into a reaction pool and an electrolytic pool by the copper ion exchange membrane, a lifting mechanism is arranged on both the left and right sides of the rear end of the working box, an electrolytic plate is connected to the output end of the lifting mechanism, a circulating water pump 1 and a circulating water pump 2 are symmetrically arranged at the front end of the working box, a nitric acid shielding reagent box and a nitric acid deshielding reagent box are arranged on the left and right ends of the working box respectively, wherein the lifting mechanism comprises a fixed frame and a lifting motor, the fixed frame is fixedly mounted on the upper end of the bottom plate, the lifting motor is fixedly mounted on the top end of the fixed frame, a threaded screw is rotatably mounted inside the fixed frame, the output end of the lifting motor penetrates into the interior of the fixed frame and is fixedly connected to the upper end of the threaded screw, a moving block is threadedly connected to the surface of the threaded screw, a lifting plate is fixedly connected to the front end of the moving block, a clamp is arranged on the front side of the other end of the lifting plate, and the electrolytic plate is clamped at the output end of the clamp.

[0007] Preferably, a pH monitor is fixedly installed at the front end of the working box, and the detection end of the pH monitor is arranged at the bottom of the reaction tank. A copper ion concentration monitor is fixedly installed at the rear end of the working box, and the detection end of the copper ion concentration monitor is arranged at the bottom of the electrolytic cell.

[0008] Preferably, the electrolytic plate comprises an anode electrode plate and a cathode electrode plate, and the two electrode plates are respectively connected to two lifting mechanisms.

[0009] Preferably, the input end of the circulating water pump 1 is connected to the external stripping waste liquid pool, and the output end of the circulating water pump 1 is connected to the front end of the working box.

[0010] Preferably, the input end of the second circulating water pump is connected to the front end of the working box, and the output end of the second circulating water pump is connected to the external stripping waste liquid pool.

[0011] Preferably, a feeding water pump 1 is fixedly installed on the upper end of the nitric acid shielding reagent box, the input end of the feeding water pump 1 is connected to the nitric acid shielding reagent box, and the output end of the feeding water pump 1 is connected to the right end of the working box.

[0012] Preferably, a feeding water pump 2 is fixedly installed on the upper end of the nitric acid deshielding reagent box, the input end of the feeding water pump 2 is connected to the feeding water pump 2, and the output end of the feeding water pump 2 is connected to the left end of the working box.

[0013] Compared with the prior art, the utility model proposes a regeneration device for nitric acid stripping waste liquid, which has the following

[0014] Beneficial effects:

[0015] 1. After the coating on the hanger on the stripping production line of the utility model is stripped by the stripping liquid, the main components of the stripping waste liquid are nitric acid and copper nitrate, which are transported to the reaction tank by a circulating water pump. At this time, copper ions enter the electrolytic cell through the copper ion exchange membrane. When the copper ion concentration reaches the set concentration, a certain proportion of the company's special nitric acid shielding agent is automatically added to the waste liquid, which can effectively prevent nitric acid from corroding copper again; and the electrolytic plate is sent into the electrolytic cell through the lifting mechanism, and high-quality electrolytic copper (content = 99.95%) can be electroplated through diaphragm electrolysis. After the electrolysis is completed, After completion, the copper ions in the stripping and hanging waste liquid are precipitated, and then nitric acid is added to deshield the shielding agent to restore the function of corroding copper. The PH controller is used to make the nitric acid concentration after regeneration meet the production requirements, and the regenerated liquid is transported back to the stripping and hanging rack tank for recycling through the circulating water pump 2; this device regenerates the waste medicine water for recycling. During the entire production process, no waste water or hazardous waste gas is generated. The online regeneration equipment only has trace acid gas during electrolysis, and no yellow smoke is generated. At the same time, high-purity metallic copper is recovered, creating greater economic and social benefits, making this process a true recycling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the lifting mechanism in the utility model;

[0018] Figure 3 This is a process flow chart of the nitric acid stripping and recycling regeneration system in the utility model.

[0019] The numbers in the figure are:

[0020] 1. Bottom plate; 2. Working box; 201. Reaction cell; 202. Electrolytic cell; 3. Copper ion exchange membrane; 4. Lifting mechanism; 401. Fixed frame; 402. Lifting motor; 403. Threaded screw; 404. Moving block; 405. Lifting plate; 406. Clamping piece; 5. Electrolytic plate; 6. pH monitor; 7. Copper ion concentration monitor; 8. Circulating water pump 1; 9. Circulating water pump 2; 10. Nitric acid shielding reagent box; 11. Feeding water pump 1; 12. Nitric acid deshielding reagent box; 13. Feeding water pump 2. DETAILED DESCRIPTION

[0021] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0022] Reference Figure 1-3As shown, a regeneration device for nitric acid stripping waste liquid includes a base plate 1 and a work box 2, the work box 2 is fixedly installed on the upper end of the base plate 1, a copper ion exchange membrane 3 is arranged inside the work box 2, the work box 2 is divided into a reaction pool 201 and an electrolytic pool 202 by the copper ion exchange membrane 3, a lifting mechanism 4 is arranged on both sides of the rear end of the work box 2, the output end of the lifting mechanism 4 is connected to the electrolytic plate 5, a circulating water pump 1 8 and a circulating water pump 2 9 are symmetrically arranged at the front end of the work box 2, a nitric acid shielding reagent box 10 and a nitric acid deshielding reagent box 12 are respectively arranged at the left and right ends of the work box 2, the device regenerates the waste liquid for recycling, and no waste water and no hazardous waste gas are generated in the whole production process, the online regeneration equipment only has a trace amount of acid gas during electrolysis, no yellow smoke is generated, and high-purity metallic copper is recovered at the same time, creating greater economic and social benefits, making the process a real recycling regeneration.

[0023] Specifically, in this embodiment, the lifting mechanism 4 includes a fixed frame 401 and a lifting motor 402, the fixed frame 401 is fixedly mounted on the upper end of the bottom plate 1, the lifting motor 402 is fixedly mounted on the top of the fixed frame 401, a threaded screw 403 is rotatably mounted inside the fixed frame 401, the output end of the lifting motor 402 penetrates into the interior of the fixed frame 401 and is fixedly connected to the upper end of the threaded screw 403, a moving block 404 is threadedly connected to the surface of the threaded screw 403, a lifting plate 405 is fixedly connected to the front end of the moving block 404, a clamping member 406 is provided at the front side of the other end of the lifting plate 405, and the output end of the clamping member 406 clamps the electrolytic plate 5. The threaded screw 403 is driven to rotate by the lifting motor 402, and the threaded screw 403 rotates to drive the moving block 404 to move up and down, and the moving block 404 drives the electrolytic plate 5 to move up and down through the lifting rod 405 and the clamping member 406, so as to put the electrolytic plate 5 into the electrolytic cell 202 for electrolytic copper treatment.

[0024] Specifically, in this embodiment, a pH monitor 6 is fixedly installed at the front end of the working box 2, and the detection end of the pH monitor 6 is arranged at the bottom of the reaction tank 201; a copper ion concentration monitor 7 is fixedly installed at the rear end of the working box 2, and the detection end of the copper ion concentration monitor 7 is arranged at the bottom of the electrolytic cell 202.

[0025] Specifically, in this embodiment, the electrolytic plate 5 includes an anode electrode plate and a cathode electrode plate, and the two electrode plates are respectively connected to two lifting mechanisms 4. The electrolytic plate 5 is sent into the electrolytic cell 202 by the lifting mechanism 4, and high-quality electrolytic copper (content = 99.95%) can be electroplated through diaphragm electrolysis.

[0026] Specifically, in this embodiment, the input end of the circulating water pump 1 8 is connected to the external peeling waste liquid pool, and the output end of the circulating water pump 1 8 is connected to the front end of the working box 2. The input end of the circulating water pump 2 9 is connected to the front end of the working box 2, and the output end of the circulating water pump 2 9 is connected to the external peeling waste liquid pool.

[0027] Specifically, in the present embodiment, a feed pump 11 is fixedly installed on the upper end of the nitric acid shielding reagent box 10, and the input end of the feed pump 11 is connected to the nitric acid shielding reagent box 10, and the output end of the feed pump 11 is connected to the right end of the working box 2. A feed pump 2 13 is fixedly installed on the upper end of the nitric acid deshielding reagent box 12, and the input end of the feed pump 2 13 is connected to the feed pump 2 13, and the output end of the feed pump 2 13 is connected to the left end of the working box 2. It is transported to the reaction tank 201 by a circulating water pump 18, and the copper ions enter the electrolytic cell 202 through the copper ion exchange membrane 3. After the electrolysis is completed, the copper ions in the stripping waste liquid are precipitated, and then the nitric acid deshielding reagent is added to restore the function of corroding copper. Through the PH controller, the nitric acid concentration after regeneration reaches the production requirement, and the regenerated liquid is transported back to the stripping rack slot for recycling by a circulating water pump 2 9.

[0028] The working principle of the utility model is: after the coating on the hanger on the stripping production line is stripped by the stripping liquid, the main components of the stripping waste liquid are nitric acid and copper nitrate, which are transported to the reaction tank 201 by a circulating water pump 8, and the copper ions enter the electrolytic cell 202 through the copper ion exchange membrane 3. When the copper ion concentration reaches the set concentration, a certain proportion of the company's special nitric acid shielding agent is automatically added to the waste liquid, which can effectively prevent the nitric acid from corroding the copper again; and the electrolytic plate 5 is sent into the electrolytic cell 202 by the lifting mechanism 4, and high-quality electrolytic copper (content = 99.95%) can be electroplated by diaphragm electrolysis. After the electrolysis is completed, the copper ions in the stripping waste liquid are precipitated, and then nitric acid is added to remove the shielding agent to restore the function of corroding copper. Through the PH controller, the concentration of nitric acid after regeneration reaches the production requirement, and the regenerated liquid is transported back to the stripping rack slot for recycling by the circulating water pump 29.

[0029] This device regenerates the waste chemical solution for recycling. During the entire production process, no waste water or hazardous waste gas is generated. The online regeneration equipment only produces a trace amount of acid gas during electrolysis, and no yellow smoke is generated. At the same time, high-purity metallic copper is recovered, creating greater economic and social benefits, making this process a true recycling process.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A regeneration device for nitric acid stripping waste liquid, characterized in that, The invention comprises a bottom plate (1) and a working box (2), wherein the working box (2) is fixedly mounted on the upper end of the bottom plate (1), a copper ion exchange membrane (3) is arranged inside the working box (2), and the working box (2) is divided into a reaction pool (201) and an electrolytic pool (202) by the copper ion exchange membrane (3), a lifting mechanism (4) is arranged on both the left and right sides of the rear end of the working box (2), and the output end of the lifting mechanism (4) is connected to an electrolytic plate (5), a circulating water pump 1 (8) and a circulating water pump 2 (9) are symmetrically arranged at the front end of the working box (2), and a nitric acid shielding reagent box (10) and a nitric acid deshielding reagent box (12) are arranged at the left and right ends of the working box (2), respectively; The lifting mechanism (4) comprises a fixed frame (401) and a lifting motor (402); the fixed frame (401) is fixedly mounted on the upper end of the bottom plate (1); the lifting motor (402) is fixedly mounted on the top of the fixed frame (401); a threaded screw (403) is rotatably mounted inside the fixed frame (401); the output end of the lifting motor (402) penetrates into the interior of the fixed frame (401) and is fixedly connected to the upper end of the threaded screw (403); a moving block (404) is threadedly connected to the surface of the threaded screw (403); a lifting plate (405) is fixedly connected to the front end of the moving block (404); a clamping member (406) is provided on the front side of the other end of the lifting plate (405); the output end of the clamping member (406) clamps the electrolytic plate (5).

2. A regeneration device for nitric acid stripping waste liquid according to claim 1, characterized in that: A pH monitor (6) is fixedly mounted on the front end of the working box (2), and a detection end of the pH monitor (6) is arranged at the bottom of the reaction tank (201). A copper ion concentration monitor (7) is fixedly mounted on the rear end of the working box (2), and a detection end of the copper ion concentration monitor (7) is arranged at the bottom of the electrolytic cell (202).

3. A regeneration device for nitric acid stripping waste liquid according to claim 1, characterized in that: The electrolytic plate (5) comprises an anode electrode plate and a cathode electrode plate, and the two electrode plates are respectively connected to two lifting mechanisms (4).

4. A regeneration device for nitric acid stripping waste liquid according to claim 1, characterized in that: The input end of the circulating water pump (8) is connected to an external stripping waste liquid pool, and the output end of the circulating water pump (8) is connected to the front end of the working box (2).

5. A regeneration device for nitric acid stripping waste liquid according to claim 1, characterized in that: The input end of the second circulating water pump (9) is connected to the front end of the working box (2), and the output end of the second circulating water pump (9) is connected to the external stripping waste liquid pool.

6. A regeneration device for nitric acid stripping waste liquid according to claim 1, characterized in that: A feeding water pump (11) is fixedly installed on the upper end of the nitric acid shielding reagent box (10), the input end of the feeding water pump (11) is connected to the nitric acid shielding reagent box (10), and the output end of the feeding water pump (11) is connected to the right end of the working box (2).

7. A regeneration device for nitric acid stripping waste liquid according to claim 1, characterized in that: A second feeding water pump (13) is fixedly installed on the upper end of the nitric acid deshielding reagent box (12), the input end of the second feeding water pump (13) is connected to the second feeding water pump (13), and the output end of the second feeding water pump (13) is connected to the left end of the working box (2).

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