Copper sulfate recovery device and recovery method thereof

Abstract

The copper sulfate recovery device comprises a stirring box, a pushing box is fixedly installed on the right side of the stirring box, a baffle is fixedly arranged on the left side of the stirring box, a reaction box is fixedly installed below the stirring box, and meanwhile the pushing box and the baffle are both located above the reaction box; the system further comprises; a double-head motor is fixedly installed in the stirring box through bolts, rotating rods are fixedly connected to the upper end and the lower end of the double-head motor, stirring fans are fixedly arranged on the outer sides of the upper portions of the rotating rods, and meanwhile the stirring fans are rotationally arranged in the stirring box; a spring is arranged in the pushing box, the left end of the spring is fixedly connected with a sliding rod, the sliding rod is arranged in the pushing box in a sliding mode, meanwhile, the left end of the sliding rod is fixedly connected with two sets of push rods, and the push rods penetrate through the stirring box. According to the copper sulfate recovery device and the recovery method thereof, copper in the wastewater is replaced by the iron powder, so that too high crystal impurities of subsequent copper sulfate are avoided, and the crystallization rate of the copper sulfate can be increased.

Description

Technical Field

[0001] The invention relates to the technical field of copper sulfate recovery, in particular to a copper sulfate recovery device and a recovery method thereof. Background Art

[0002] With the development of the electronics industry, more and more electrical appliances are being used, and the corresponding etching liquid is also widely used. The recycling of etching liquid after use has become an important issue.

[0003] During the manufacturing process of printed circuit boards, the surface of the printed circuit boards is roughened, that is, the printed circuit boards are placed in the etching main tank and etched with etching liquid to make the copper circuits appear. The etching liquid is generally a mixed solution of hydrogen peroxide / sulfuric acid, but a large amount of copper ions and etching liquid will be mixed during the etching process. As the concentration of copper ions increases, the etching efficiency of the etching liquid decreases. Furthermore, if the copper ion concentration in the solution reaches 45g / L, the copper ions will crystallize and precipitate in the form of copper sulfate. The precipitated copper sulfate crystals will adhere to the tank wall or other transmission mechanisms, thereby damaging the working system. If the unusable etching liquid is directly discharged, it will cause waste and pollution to the environment. Generally, the copper sulfate crystals in the etching liquid are recycled, which can also improve the etching efficiency of the etching liquid.

[0004] Publication No. "CN113336260B" is a method for recovering copper sulfate from acidic copper sulfate waste liquid, comprising the following steps: S1, collecting acidic copper sulfate waste liquid; S2, adding Cu(OH)2 to the acidic copper sulfate waste liquid for neutralization treatment; S3, pumping the acidic copper sulfate waste liquid in step S2 to a first evaporation crystallization device for crystallization and evaporation; S4, the material in step S3 is passed through a solid-liquid separation system to obtain a copper sulfate product, and the separated evaporated mother liquor is discharged into a de-impurity reactor; S5, sodium hydroxide solid is added to the de-impurity reactor to produce a copper hydroxide precipitate, which is dehydrated and washed and then returned to step S2, and the supernatant enters a second evaporation crystallization device or enters a factory sewage treatment station for further treatment; S6, the second evaporation crystallizer performs crystallization and evaporation on the supernatant; the method has the advantages of high purity of the recovered product, no new impurity ions are introduced in the process of adding reagents, stable operation of the treatment process, and no secondary pollutants;

[0005] The method collects copper sulfate in acidic copper sulfate waste liquid by evaporation and crystallization, but other metal components are often present in the waste liquid. If the metallic copper in the acidic copper sulfate waste liquid is not separated first, it is easy to cause the subsequent copper sulfate crystal impurities to be too high, and the crystallization rate of copper sulfate is not high. In addition, when copper hydroxide is added to the acidic copper sulfate waste liquid, the addition cannot be effectively controlled, which is very inconvenient. Therefore, a copper sulfate recovery device and a recovery method thereof are proposed to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a copper sulfate recovery device and a recovery method thereof, so as to solve the problems proposed in the above background technology that copper sulfate in acidic copper sulfate waste liquid is collected by evaporation and crystallization in the current market, but other metal components are often present in the waste liquid. If the metallic copper in the acidic copper sulfate waste liquid is not separated first, it is easy to cause the subsequent copper sulfate crystal impurities to be too high, and the crystallization rate of copper sulfate is not high. In addition, when copper hydroxide is added to the acidic copper sulfate waste liquid, the addition cannot be effectively controlled, which is very inconvenient.

[0007] To achieve the above object, the present invention provides the following technical solution: a copper sulfate recovery device, comprising a stirring box, a push box is fixedly installed on the right side of the stirring box, a baffle is fixedly arranged on the left side of the stirring box, and a reaction box is fixedly installed below the stirring box, and the push box and the baffle are both located above the reaction box;

[0008] A roller is arranged below the reaction box;

[0009] It also includes: a double-headed motor is fixedly installed in the mixing box by bolts, and the upper and lower ends of the double-headed motor are fixedly connected to a rotating rod, and a stirring fan is fixedly arranged on the outer side of the upper part of the rotating rod, and the stirring fan is rotatably arranged in the mixing box;

[0010] A spring is arranged in the pushing box, and a sliding rod is fixedly connected to the left end of the spring, and the sliding rod is slidingly arranged in the pushing box. Meanwhile, two groups of push rods are fixedly connected to the left end of the sliding rod, and the push rods are arranged to penetrate the mixing box.

[0011] Preferably, the upper end of the slide rod is arranged to pass through the push box, and a threaded rod is threadedly connected to the inner side of the upper end of the slide rod. The slide rod can be limited by cooperating with the threaded hole opened in the upper surface of the push box.

[0012] Preferably, a drainage pump is fixedly installed on the left side of the mixing box, and a discharge port is provided on the left side of the mixing box, and the drainage pump is located above the discharge port, and waste liquid can be discharged through the drainage pump.

[0013] Preferably, the lower end of the rotating rod is arranged to pass through the mixing box and the reaction box, and a belt is sleeved on the outer side of the lower end of the rotating rod, and a connecting rod is sleeved on the inner side of the left end of the belt. At the same time, the connecting rod is rotatably arranged on the left side of the reaction box, and rotating plates are fixedly installed on both sides of the connecting rod. The belt can drive the rotating plate to stir the metallic copper and dilute sulfuric acid.

[0014] Preferably, a heating plate is fixedly installed inside the right side of the reaction box, and door panels are rotatably installed on the left and right sides of the reaction box through hinges, and a liquid injection port is installed on the left side of the reaction box. At the same time, a ventilation hole is opened on the upper right side of the reaction box, and the left and right sides of the reaction box are connected by a liquid pump. Copper sulfate can be heated by the heating plate, so that copper sulfate crystals are precipitated.

[0015] Preferably, a screw is connected to the internal thread above the mixing box, and the left end of the screw is rotatably connected to a limited quantity partition, and the limited quantity partition is slidably installed on the inner side of the feeding port, and the limited quantity partition can be driven to move by the screw.

[0016] Another technical solution provided by the present invention is to provide a recovery method of a copper sulfate recovery device, comprising the following steps:

[0017] S1, the extraction process of copper sulfate comprises the following sub-steps:

[0018] S11, injecting the copper sulfate etching solution wastewater into the stirring box through the injection port, and then putting the iron powder into the stirring box through the feeding port, at this time, the copper sulfate in the copper sulfate etching solution wastewater will react with the iron powder, and metallic copper will form a precipitate in the copper sulfate etching solution wastewater;

[0019] S12, the extra waste water is discharged by the drainage pump, the precipitate is pushed to the left side of the reaction box by the push rod, and then dilute sulfuric acid is injected into the left side of the reaction box through the injection port. The dilute sulfuric acid will react with the metallic copper in the precipitate, and a copper sulfate solution will be generated in the left side of the reaction box;

[0020] S13, the copper sulfate solution can be introduced into the right side of the reaction box by a liquid pump, and the copper sulfate solution can be heated by a heating plate installed in the right side of the reaction box, so that copper sulfate can be precipitated and fixed in the copper sulfate solution;

[0021] S14, the ferrous sulfate that does not react with the dilute sulfuric acid in the left side of the reaction box can be taken out through the door plate arranged on the left side of the reaction box, and the copper sulfate precipitated in the right side of the reaction box can be fixed and taken out through the door plate arranged on the right side of the reaction box, so that the metallic copper in the copper sulfate etching liquid wastewater can be removed, which is beneficial to the subsequent discharge of the copper sulfate etching liquid wastewater, and the copper sulfate can be recovered, thereby helping to reduce the copper sulfate etching liquid wastewater treatment cost.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the copper sulfate recovery device and the recovery method thereof replace copper in wastewater by iron powder, thereby avoiding excessive impurities in subsequent copper sulfate crystals and increasing the crystallization rate of copper sulfate. The specific contents are as follows:

[0023] (1) A stirring fan and a push rod are provided, and the rotating rod is driven to rotate by a double-headed motor, and the rotating rod drives the stirring fan to stir the iron powder and the copper sulfate etching solution wastewater, so that the replacement efficiency of the metal copper is higher, and the metal copper and ferrous sulfate can be pushed out by the push rod, so as to facilitate the subsequent recovery and use of the copper sulfate;

[0024] (2) A screw is provided, and the limited baffle can be driven to move inside the feeding port by the rotation of the screw, so that the iron powder can be added into the mixing box in a controlled amount, which is beneficial to the full reaction of the copper sulfate etching solution wastewater, and can avoid the waste of iron powder, which is beneficial to improving the replacement efficiency of metallic copper. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the front cross-section structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the top-sectional structure of the push rod of the present invention;

[0027] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0028] Figure 4 It is a schematic diagram of the top-sectional structure of the reaction box of the present invention;

[0029] Figure 5 It is a schematic diagram of the top view structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the side view structure of the reaction box of the present invention;

[0031] Figure 7 It is a schematic diagram of the recovery method of the present invention.

[0032] In the figure: 1. mixing box; 2. pushing box; 3. baffle; 4. reaction box; 5. roller; 6. double-headed motor; 7. rotating rod; 8. stirring fan; 9. liquid discharge pump; 10. pushing rod; 11. sliding rod; 12. spring; 13. threaded rod; 14. discharge port; 15. belt; 16. connecting rod; 17. rotating plate; 18. liquid injection port; 19. liquid extraction pump; 20. heating plate; 21. ventilation hole; 22. injection port; 23. feeding port; 24. screw rod; 25. limiting partition; 26. door panel. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-7 The present invention provides a technical solution: a copper sulfate recovery device, comprising a stirring box 1, a push box 2 is fixedly installed on the right side of the stirring box 1, a baffle 3 is fixedly installed on the left side of the stirring box 1, and a reaction box 4 is fixedly installed below the stirring box 1, and the push box 2 and the baffle 3 are both located above the reaction box 4; a roller 5 is arranged below the reaction box 4;

[0035] The device can be driven to move by the roller 5 provided under the reaction box 4, so as to facilitate the subsequent transfer of the device, and the copper sulfate etching waste liquid is injected into the stirring box 1 through the injection port 22 provided on the upper left side of the stirring box 1, and then the iron powder is injected into the stirring box 1 through the feeding port 23 provided on the upper right side of the stirring box 1;

[0036] In order to better demonstrate the copper sulfate recovery device and the recovery method thereof, in this embodiment, a recovery method for a copper sulfate recovery device includes the following steps:

[0037] S1, the extraction process of copper sulfate comprises the following sub-steps:

[0038] first step;

[0039] The copper sulfate etching liquid wastewater is injected into the stirring box through the injection port 22, and then the iron powder is put into the stirring box 1 through the feeding port 23. At this time, the copper sulfate in the copper sulfate etching liquid wastewater will react with the iron powder, and the metallic copper will form a precipitate in the copper sulfate etching liquid wastewater;

[0040] The mixing box 1 also includes: a double-headed motor 6 is fixedly installed by bolts, and the upper and lower ends of the double-headed motor 6 are fixedly connected with a rotating rod 7, and a stirring fan 8 is fixedly arranged on the outer side of the upper part of the rotating rod 7, and the stirring fan 8 is rotatably arranged in the mixing box 1; a screw rod 24 is internally threadedly connected to the upper part of the mixing box 1, and the left end of the screw rod 24 is rotatably connected to a limited amount partition 25, and the limited amount partition 25 is slidably installed on the inner side of the feeding port 23;

[0041] In order to control the amount of iron powder added, the screw rod 24 can be manually rotated, and the screw rod 24 rotates to move the limiting baffle 25 inside the feeding port 23, so that the iron powder can enter the mixing box 1 in a controllable amount. Since the chemical property of iron is weaker than that of copper, the copper sulfate etching waste liquid will undergo a replacement reaction with the iron powder. At this time, metallic copper, ferrous sulfate and liquid impurities will be produced in the mixing box 1. In order to make the reaction of the copper sulfate etching waste liquid and the iron powder more comprehensive, the double-headed motor 6 can be controlled to be turned on, and the double-headed motor 6 will drive the rotating rod 7 to rotate in the mixing box 1. The rotation of the rotating rod 7 will drive the stirring fan 8 to mix the copper sulfate etching waste liquid with the iron powder, so as to make the replacement efficiency of the metallic copper faster;

[0042] A spring 12 is provided in the push box 2, and a slide bar 11 is fixedly connected to the left end of the spring 12, and the slide bar 11 is slidably provided in the push box 2, and two sets of push rods 10 are fixedly connected to the left end of the slide bar 11, and the push rod 10 is provided to penetrate the mixing box 1; the upper end of the slide bar 11 is provided to penetrate the push box 2, and a threaded rod 13 is threadedly connected to the inner side of the upper end of the slide bar 11, and the slide bar 11 can be limited by the threaded rod 13 and the threaded hole opened on the upper surface of the push box 2; a liquid discharge pump 9 is fixedly installed on the left side of the mixing box 1, and a discharge port 14 is provided on the left side of the mixing box 1, and the liquid discharge pump 9 is located above the discharge port 14;

[0043] Step 2:

[0044] The extra waste water is discharged by the drainage pump 9, and the precipitate is pushed to the left side of the reaction box 4 by the push rod 10, and then the dilute sulfuric acid is injected into the left side of the reaction box 4 through the injection port 18. The dilute sulfuric acid will react with the metallic copper in the precipitate, and a copper sulfate solution will be generated in the left side of the reaction box 4;

[0045] When the reaction of the copper sulfate etching waste liquid and the iron powder is complete, the liquid impurities generated in the mixing box 1 can be extracted and discharged through the drainage pump 9, so that the discharge of the copper sulfate etching waste liquid is not easy to pollute the environment, and then the threaded rod 13 arranged above the push box 2 is manually rotated to make the threaded rod 13 disengage from the threaded hole opened above the push box 2. Under the action of the spring 12 resetting, the slide bar 11 will move to the left in the push box 2. The movement of the slide bar 11 will drive the push rod 10 to push the solid metal copper and ferrous sulfate in the mixing box 1, so that the metal copper and ferrous sulfate enter the left side of the reaction box 4 through the discharge port 14, and the metal copper and ferrous sulfate can be protected by the baffle 3 to prevent the metal copper and ferrous sulfate from falling out of the device.

[0046] After the push rod 10 pushes the copper and ferrous sulfate out of the mixing box 1, the slide bar 11 can be manually pulled to move the slide bar 11 to the right in the push box 2, and the slide bar 11 will compress the spring 12. When the left end of the push rod 10 is embedded in the inner side of the mixing box 1, the threaded rod 13 can be manually rotated to make the threaded rod 13 and the threaded hole opened on the top of the push box 2 threadedly connected. The slide bar 11 can be limited by the threaded rod 13, so that the device is convenient for next use;

[0047] The lower end of the rotating rod 7 is arranged to penetrate the stirring box 1 and the reaction box 4, and a belt 15 is sleeved on the outer side of the lower end of the rotating rod 7, and a connecting rod 16 is sleeved on the inner side of the left end of the belt 15, and the connecting rod 16 is rotatably arranged in the left side of the reaction box 4, and rotating plates 17 are fixedly installed on both sides of the connecting rod 16; a heating plate 20 is fixedly installed in the right side of the reaction box 4, and door panels 26 are rotatably installed on both sides of the reaction box 4 through hinges, and a liquid injection port 18 is installed on the left side of the reaction box 4, and a ventilation hole 21 is opened on the upper right side of the reaction box 4, and the left and right sides of the reaction box 4 are connected through a liquid pump 19;

[0048] Step 3;

[0049] The copper sulfate solution can be introduced into the right side of the reaction box 4 by the liquid pump 19, and the copper sulfate solution can be heated by the heating plate 20 installed in the right side of the reaction box 4, so that copper sulfate can be precipitated and fixed in the copper sulfate solution;

[0050] When metallic copper and ferrous sulfate fall into the left side of the reaction box 4, dilute sulfuric acid can be injected into the left side of the reaction box 4 through the injection port 18, so that the dilute sulfuric acid reacts with the metallic copper. At this time, a copper sulfate solution will be produced in the left side of the reaction box 4. In order to make the reaction of dilute sulfuric acid and metallic copper faster, the double-headed motor 6 can be controlled to be turned on again, and the double-headed motor 6 will drive the rotating rod 7 to rotate. The lower end of the rotating rod 7 will drive the belt 15 to rotate, and the belt 15 drives the rotating plate 17 to stir the dilute sulfuric acid and metallic copper through the connecting rod 16, so that the generation of the copper sulfate solution is faster. When the dilute sulfuric acid and metallic copper react completely, the liquid extraction pump 19 can be controlled to be turned on, so that the copper sulfate solution enters the left side of the reaction box 4 through the liquid extraction pump 19, and then the heating plate 20 is controlled to be turned on, so that the heating plate 20 heats the copper sulfate solution, so that copper sulfate solid crystals can be precipitated in the left side of the reaction box 4.

[0051] Step 4:

[0052] The ferrous sulfate that does not react with the dilute sulfuric acid in the left side of the reaction box 4 can be taken out through the door plate 26 arranged on the left side of the reaction box 4, and the copper sulfate solid precipitated in the right side of the reaction box 4 can be taken out through the door plate 26 arranged on the right side of the reaction box 4, so that the metallic copper in the copper sulfate etching liquid wastewater can be removed, which is beneficial to the subsequent discharge of the copper sulfate etching liquid wastewater, and the copper sulfate can be recovered, which is beneficial to reduce the copper sulfate etching liquid wastewater treatment cost;

[0053] Working principle of this embodiment: When using the copper sulfate recovery device and the recovery method thereof, first, copper sulfate etching waste liquid is injected into the mixing box 1 through the injection port 22, and iron powder is injected into the mixing box 1 through the feeding port 23.

[0054] The iron powder can be added in a controlled amount through the limiting baffle 25. At this time, metallic copper will be produced in the stirring box 1. The double-headed motor 6 is turned on. The double-headed motor 6 drives the stirring fan 8 through the rotating rod 7 to mix the copper sulfate etching waste liquid and the iron powder, so as to make the replacement efficiency of the metallic copper faster.

[0055] The push rod 10 can push the metallic copper and ferrous sulfate, so that the metallic copper and ferrous sulfate enter the left side of the reaction box 4, and then dilute sulfuric acid is injected into the left side of the reaction box 4 through the injection port 18, so that a copper sulfate solution is generated in the left side of the reaction box 4, and the copper sulfate solution is allowed to enter the left side of the reaction box 4 by the liquid pump 19, so that the heating plate 20 heats the copper sulfate solution, so that copper sulfate solid crystals can be precipitated in the left side of the reaction box 4, and the door panel 26 is rotated to take out the copper sulfate solid crystals, thereby completing a series of work.

[0056] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A copper sulfate recovery device, comprising a stirring box (1), a push box (2) is fixedly installed on the right side of the stirring box (1), a baffle (3) is fixedly arranged on the left side of the stirring box (1), and a reaction box (4) is fixedly installed below the stirring box (1), and the push box (2) and the baffle (3) are both located above the reaction box (4); A roller (5) is arranged below the reaction box (4); It is characterized in that Also includes; A double-headed motor (6) is fixedly installed in the mixing box (1) by means of bolts, and the upper and lower ends of the double-headed motor (6) are fixedly connected to a rotating rod (7), and a stirring fan (8) is fixedly arranged on the outer side of the upper part of the rotating rod (7), and the stirring fan (8) is rotatably arranged in the mixing box (1); The push box (2) is provided with a spring (12), and the left end of the spring (12) is fixedly connected to a slide bar (11), and the slide bar (11) is slidably arranged in the push box (2), and at the same time, the left end of the slide bar (11) is fixedly connected to two groups of push rods (10), and the push rods (10) are arranged to penetrate the mixing box (1).

2. A copper sulfate recovery device according to claim 1, characterized in that: The upper end of the slide rod (11) is arranged to penetrate the push box (2), and a threaded rod (13) is threadedly connected to the inner side of the upper end of the slide rod (11). The slide rod (11) can be limited by the threaded rod (13) cooperating with a threaded hole provided on the upper surface of the push box (2).

3. A copper sulfate recovery device according to claim 1, characterized in that: A liquid discharge pump (9) is fixedly installed on the left side of the mixing box (1), and a discharge port (14) is provided on the left side of the mixing box (1), and the liquid discharge pump (9) is located above the discharge port (14).

4. A copper sulfate recovery device according to claim 1, characterized in that: The lower end of the rotating rod (7) is arranged to penetrate the stirring box (1) and the reaction box (4), and a belt (15) is sleeved on the outer side of the lower end of the rotating rod (7), and a connecting rod (16) is sleeved on the inner side of the left end of the belt (15). At the same time, the connecting rod (16) is rotatably arranged in the left side of the reaction box (4), and rotating plates (17) are fixedly installed on both sides of the left and right sides of the connecting rod (16).

5. A copper sulfate recovery device according to claim 1, characterized in that: A heating plate (20) is fixedly installed in the right side of the reaction box (4), and door panels (26) are rotatably installed on both the left and right sides of the reaction box (4) through hinges, and a liquid injection port (18) is installed on the left side of the reaction box (4). At the same time, a ventilation hole (21) is opened on the upper right side of the reaction box (4), and the left and right sides of the reaction box (4) are connected through a liquid pump (19).

6. A copper sulfate recovery device according to claim 1, characterized in that: A screw rod (24) is connected to the internal thread on the top of the mixing box (1), and the left end of the screw rod (24) is rotatably connected to a limited quantity partition (25), and the limited quantity partition (25) is slidably installed on the inner side of the feeding port (23).

7. The recovery method of a copper sulfate recovery device according to claim 1, characterized in that: The following steps are involved: S1, the extraction process of copper sulfate comprises the following sub-steps: S11, injecting the copper sulfate etching solution wastewater into the stirring box through the injection port, and then putting the iron powder into the stirring box through the feeding port, at this time, the copper sulfate in the copper sulfate etching solution wastewater will react with the iron powder, and metallic copper will form a precipitate in the copper sulfate etching solution wastewater; S12, the extra waste water is discharged by the drainage pump, the precipitate is pushed to the left side of the reaction box by the push rod, and then dilute sulfuric acid is injected into the left side of the reaction box through the injection port. The dilute sulfuric acid will react with the metallic copper in the precipitate, and a copper sulfate solution will be generated in the left side of the reaction box; S13, the copper sulfate solution can be introduced into the right side of the reaction box by a liquid pump, and the copper sulfate solution can be heated by a heating plate installed in the right side of the reaction box, so that copper sulfate can be precipitated and fixed in the copper sulfate solution; S14, the ferrous sulfate that does not react with the dilute sulfuric acid in the left side of the reaction box can be taken out through the door plate arranged on the left side of the reaction box, and the copper sulfate precipitated in the right side of the reaction box can be fixed and taken out through the door plate arranged on the right side of the reaction box, so that the metallic copper in the copper sulfate etching liquid wastewater can be removed, which is beneficial to the subsequent discharge of the copper sulfate etching liquid wastewater, and the copper sulfate can be recovered, thereby helping to reduce the copper sulfate etching liquid wastewater treatment cost.

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