Purification device and purification process for high-purity copper sulfate

Abstract

The device comprises an outer cylinder, an inner cylinder, a cover plate, a guide column, a cooling pipe, a mounting groove, a spring, a sealing cover, a liquid discharging hole channel, a heating disc, a driven wheel, a discharging opening, a first valve, a centrifugal motor, a driving wheel, a synchronous belt, a liquid discharging opening, a second valve, a liquid inlet and a connecting base. The process comprises the following steps: 1, dissolving raw materials; step 2, pretreatment; step 3, purification reaction; step 4, evaporative crystallization; step 5, centrifugal separation; step 6, mother liquor treatment; and step 7, drying and packaging. Through the integrated design of an evaporative crystallization structure and a centrifugal separation structure, the equipment composition is remarkably simplified, the occupied area of the device is greatly reduced, the requirement for space is looser, meanwhile, the transmission and exchange frequency of materials among different devices is reduced, and therefore the overall production efficiency is effectively improved, and the production cost is reduced. And the material loss is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of copper sulfate purification, in particular to a purification device and a purification process for high-purity copper sulfate. Background Art

[0002] Copper sulfate (CuSO4) is an inorganic compound widely used in industrial production and scientific research. The application of copper sulfate is very wide, covering many fields such as industry, agriculture, water treatment, medicine, education, scientific research and art. Purification of copper sulfate can significantly improve its purity and reduce the impurity content. High-purity copper sulfate can show better performance in subsequent applications, such as higher catalytic activity, better electroplating effect, stronger bactericidal ability, etc.; this is crucial to improving the quality and performance of downstream products, especially in high-end manufacturing, precision electronics, medicine and other fields.

[0003] The existing copper sulfate purification has the following defects: First, in the current process, the two core devices of evaporation crystallization and centrifugal separation have not yet been integrated, resulting in a large footprint of the overall device, which not only increases the difficulty of space utilization, but also reduces the overall production efficiency due to frequent material exchanges between equipment. This decentralized layout limits the optimization and upgrading of the purification process; Second, during the cooling crystallization process, the surface of the internal stirring equipment often becomes the "hardest hit area" for crystal attachment. These attached crystals are difficult to clean effectively, and long-term accumulation will affect the operation of the equipment, and the cooling rate is low, which in turn affects the crystallization efficiency and product quality; Third, the centrifugal separation process is easily obstructed. During centrifugal crystallization separation, the filter holes on the cylinder wall are often blocked by fine crystals, which not only increases the difficulty of cleaning, but also greatly reduces the separation efficiency, seriously restricting the stable operation and efficient output of the purification process. Summary of the invention

[0004] The object of the present invention is to provide a purification device and a purification process for high-purity copper sulfate to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a purification device for high-purity copper sulfate, comprising an outer cylinder, an inner cylinder arranged in the outer cylinder, a mounting groove opened on the inner wall of the inner cylinder, a spring fixedly connected in the mounting groove, a sealing cover fixedly connected at the other end of the spring, and the sealing cover is sleeved in the mounting groove, a drainage channel is opened on the outer wall of the inner cylinder corresponding to the mounting groove, and the drainage channel is conductively connected to the mounting groove, a cover plate is arranged on the upper surface of the outer cylinder, a connecting rod is fixedly connected to the lower surface of the cover plate, a retaining frame is fixedly connected at the other end of the connecting rod, and a cooling pipe is fixedly connected to the retaining frame.

[0006] As a further technical solution of the present invention, a guide column is fixedly connected to the upper surface of the outer cylinder, and a cover plate is sleeved on the guide column, a fixing frame is fixedly connected to the upper surface of the cover plate, a stirring motor is fixedly connected to the fixing frame, a coupling is fixedly connected to the output end of the stirring motor, a stirring shaft is fixedly connected to the other end of the coupling, and the stirring shaft is sleeved on the cover plate, and a stirring blade is fixedly connected to the stirring shaft.

[0007] As a further technical solution of the present invention, a fixing plate is provided at the top of the cover plate, and the fixing plate is fixedly connected to the guide column, the upper surface of the fixing plate is fixedly connected to a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to a top column, the upper surface of the fixing frame is fixedly connected to a connecting seat, and the other end of the top column is fixedly connected to the connecting seat.

[0008] As a further technical solution of the present invention, a heating plate is fixedly connected to one end of the stirring shaft.

[0009] As a further technical solution of the present invention, a discharge port is provided on the lower surface of the inner cylinder, and the discharge port is sleeved on the outer cylinder, a first valve is fixedly connected to the discharge port, a centrifugal motor is provided on one side of the discharge port, a driving wheel is fixedly connected to the output end of the centrifugal motor, a synchronous belt is sleeved on the driving wheel, a driven wheel is fixedly connected to the discharge port, and the synchronous belt is sleeved on the driven wheel.

[0010] As a further technical solution of the present invention, the upper surface of the cover plate is fixedly connected with a liquid inlet interface, a liquid outlet interface and a liquid inlet, and the liquid inlet interface and the liquid outlet interface are both conductively connected to the cooling pipe, and drain ports are provided on the outer walls on both sides of the outer tube, and a second valve is fixedly connected to the drain port.

[0011] A purification process for high-purity copper sulfate, comprising step 1, dissolving raw materials; step 2, pretreatment; step 3, purification reaction; step 4, evaporation crystallization; step 5, centrifugal separation; step 6, mother liquor treatment; step 7, drying and packaging; Wherein in the above step 1, the crude copper sulfate is dissolved in an appropriate amount of water to form a copper sulfate solution; In the above step 2, large particles of impurities and suspended matter in the solution are removed by filtering and precipitation; In the above step 3, hydrogen peroxide is added to the reaction kettle to oxidize the copper sulfate solution to remove iron, arsenic and lead impurities in the solution and improve the purity of the copper sulfate; In the above step 4, the solution is heated and evaporated by a heating plate, and then rapidly cooled and crystallized by a cooling tube; In the above step 5, the inner cylinder is driven to rotate by a centrifugal motor to centrifuge the copper sulfate crystals; In the above step 6, the mother liquor after centrifugal separation can be returned to the device for recycling to improve the utilization rate of the raw materials. If the copper sulfate concentration in the mother liquor is low, it can also be sent to the wastewater treatment system for treatment; In the above step seven, the separated copper sulfate crystals are sent to a dryer for drying to remove residual moisture therein. The dried copper sulfate crystals can be packaged and stored after quality inspection.

[0012] As a further technical solution of the present invention, in the step 3, since the crude copper sulfate is a product of concentrated crystallization of the electrolyte, the electrolyte contains a large amount of iron, arsenic and lead impurities, which exist in the waste liquid in the form of ions and still exist in the crude copper sulfate after crystallization, a certain amount of hydrogen peroxide is added to the reactor for oxidation, and then Na2CO3 solution is added to adjust the pH value of the solution to 3.5-4.0, so that Fe 3+ Fe(OH)3 precipitates are formed and then removed, while Pb 2+ Ions and AsO2 - A precipitate is formed and the overall reaction equation is as follows:

[0013] As a further technical solution of the present invention, in the step 4, the copper sulfate solution after impurity removal is input into the inner cylinder through the liquid inlet on the cover plate, heated and evaporated by the heating plate, and at the same time, the stirring motor on the fixed frame drives the stirring shaft to rotate through the coupling, and the stirring shaft stirs the solution through the stirring blades thereon, so as to keep the solution evenly heated to increase the concentration of copper sulfate. When the solution reaches the precipitation concentration, copper sulfate begins to precipitate in the form of crystals. At this time, heating is stopped, and the cooling pipe is connected to the cooling circulation system through the liquid inlet interface and the liquid outlet interface. The solution is quickly cooled by the cooling pipe to reduce the solubility of copper sulfate and promote crystal precipitation, which also helps to improve the quality of the crystals. During the cooling process, the crystals have enough time to arrange and grow in an orderly manner, thereby forming crystals with neat and regular geometric shapes. Such orderly arranged crystals usually have higher purity and better physical properties.

[0014] As a further technical solution of the present invention, in the step 5, the hydraulic cylinder on the fixed plate is connected to the fixed frame through the top column and the connecting seat, and the hydraulic cylinder and the cover plate are moved up along the guide column to move the evaporation crystallization assembly out of the inner cylinder, which is convenient for subsequent centrifugal separation and cleaning of the copper sulfate crystals attached to the surface of the stirring shaft and the cooling tube. The inner cylinder and the outer cylinder are closed, and the centrifugal motor drives the driving wheel to rotate, and the driving wheel drives the driven wheel to rotate through the synchronous belt, thereby driving the inner cylinder to rotate at a high speed. When the inner cylinder rotates at a high speed, the internal copper sulfate solution rotates and generates pressure on the cylinder wall under the action of centrifugal force. The sealing cover squeezes the spring under the action of its own centrifugal force and solution pressure. The spring compresses the sealing cover to move into the installation groove, leaking the drainage channel to make it conductive with the inner cylinder, and the solution is discharged through the drainage channel and discharged through the drainage port to achieve centrifugal separation of copper sulfate crystals. After the centrifugation is completed, the sealing cover is reset under the action of the spring, and the crystals that may be blocked in the installation groove are pushed out and closed.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention not only significantly simplifies the equipment structure, but also greatly reduces the footprint of the device through the integrated design of the evaporation crystallization structure and the centrifugal separation structure, and the space requirement is more relaxed. At the same time, the number of times the material is transmitted and exchanged between different devices is reduced, thereby effectively improving the overall production efficiency and greatly reducing material loss. In addition, a movable evaporation crystallization component is designed. After the evaporation crystallization is completed, the relevant structure can be removed to clean the crystals attached to the surface, thereby ensuring that the device can maintain an efficient and stable operating state for a long time. At the same time, an anti-clogging filtering structure is designed, which utilizes the centrifugal force generated by the copper sulfate solution during the centrifugation process to automatically open the filtrate channel for filtrate treatment. When the centrifugation process is completed, the spring structure will automatically reset and close the channel, thereby effectively avoiding the clogging problem of the filter hole due to frequent encounters with fine crystals, further ensuring the long-term stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the device of the present invention; Figure 2 It is a schematic diagram of the three-dimensional cutaway structure of the device of the present invention; Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the A area in the middle; Figure 4 It is a schematic diagram of the front view cutaway structure of the device of the present invention; Figure 5 It is a structural explosion diagram of the present invention; Figure 6 It is a schematic diagram of a top view of a cutaway structure of the device of the present invention; Figure 7 for Figure 6 Schematic diagram of the enlarged structure of the middle B area; Figure 8 The figure is a flow chart of the process of the present invention.

[0017] In the figure: 1. outer cylinder; 2. inner cylinder; 3. cover plate; 4. guide column; 5. fixed plate; 6. hydraulic cylinder; 7. top column; 8. fixed frame; 9. stirring motor; 10. coupling; 11. stirring shaft; 12. stirring blade; 13. connecting rod; 14. retaining frame; 15. cooling pipe; 16. liquid inlet interface; 17. liquid outlet interface; 18. mounting groove; 19. spring; 20. sealing cover; 21. drainage channel; 22. heating plate; 23. driven wheel; 24. discharge port; 25. first valve; 26. centrifugal motor; 27. driving wheel; 28. synchronous belt; 29. ​​discharge port; 30. second valve; 31. liquid inlet; 32. connecting seat. DETAILED DESCRIPTION

[0018] 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.

[0019] Please see attached Figure 1 -Attached Figure 7An embodiment of the present invention is as follows: a purification device for high-purity copper sulfate comprises an outer cylinder 1, an inner cylinder 2 is arranged inside the outer cylinder 1, a mounting groove 18 is provided on the inner wall of the inner cylinder 2, a spring 19 is fixedly connected in the mounting groove 18, a sealing cover 20 is fixedly connected at the other end of the spring 19, and the sealing cover 20 is sleeved in the mounting groove 18, a drainage channel 21 is provided on the outer wall of the inner cylinder 2 corresponding to the mounting groove 18, and the drainage channel 21 is conductively connected to the mounting groove 18, a cover plate 3 is provided on the upper surface of the outer cylinder 1, a connecting rod 13 is fixedly connected to the lower surface of the cover plate 3, and a retaining frame 14 is fixedly connected at the other end of the connecting rod 13, A cooling pipe 15 is fixedly connected to the retaining frame 14; a guide column 4 is fixedly connected to the upper surface of the outer cylinder 1, and the cover plate 3 is sleeved on the guide column 4, a fixing frame 8 is fixedly connected to the upper surface of the cover plate 3, a stirring motor 9 is fixedly connected to the fixing frame 8, a coupling 10 is fixedly connected to the output end of the stirring motor 9, a stirring shaft 11 is fixedly connected to the other end of the coupling 10, and the stirring shaft 11 is sleeved on the cover plate 3, a stirring blade 12 is fixedly connected to the stirring shaft 11, and the stirring motor 9, the coupling 10, the stirring shaft 11 and the stirring blade 12 are used to stir the copper sulfate solution to ensure that it is evenly heated and cooled; a fixing plate 5 is arranged on the top of the cover plate 3, The fixing plate 5 is fixedly connected to the guide column 4, the upper surface of the fixing plate 5 is fixedly connected with a hydraulic cylinder 6, the output end of the hydraulic cylinder 6 is fixedly connected with a top column 7, the upper surface of the fixing frame 8 is fixedly connected with a connecting seat 32, and the other end of the top column 7 is fixedly connected to the connecting seat 32, and the hydraulic cylinder 6 is used to drive the cover plate 3 to move along the guide column 4; one end of the stirring shaft 11 is fixedly connected to a heating plate 22, and the heating plate 22 is used to heat and evaporate to increase the concentration of the copper sulfate solution; the lower surface of the inner cylinder 2 is provided with a discharge port 24, and the discharge port 24 is sleeved on the outer cylinder 1, and the discharge port 24 is fixedly connected with a first valve 25, and one side of the discharge port 24 is provided A centrifugal motor 26 is arranged, and a driving wheel 27 is fixedly connected to the output end of the centrifugal motor 26, and a synchronous belt 28 is sleeved on the driving wheel 27. A driven wheel 23 is fixedly connected to the discharge port 24, and the synchronous belt 28 is sleeved on the driven wheel 23. The centrifugal motor 26, the driving wheel 27, the synchronous belt 28 and the driven wheel 23 are used to drive the inner tube 2 to rotate; the upper surface of the cover plate 3 is fixedly connected with a liquid inlet interface 16, a liquid outlet interface 17 and a liquid inlet 31, and the liquid inlet interface 16 and the liquid outlet interface 17 are both conductively connected to the cooling pipe 15, and a liquid discharge port 29 is arranged on the outer walls of both sides of the outer tube 1, and a second valve 30 is fixedly connected to the liquid discharge port 29.

[0020] Please see attached Figure 8 The present invention provides an embodiment: a purification process of high-purity copper sulfate, comprising step 1, dissolving raw materials; step 2, pretreatment; step 3, purification reaction; step 4, evaporation and crystallization; step 5, centrifugal separation; step 6, mother liquor treatment; step 7, drying and packaging; Wherein in the above step 1, the crude copper sulfate is dissolved in an appropriate amount of water to form a copper sulfate solution; In the above step 2, large particles of impurities and suspended matter in the solution are removed by filtering and precipitation; In the above step 3, since the crude copper sulfate is a product of concentrated crystallization of the electrolyte, the electrolyte contains a large amount of iron, arsenic and lead impurities, which exist in the waste liquid in the form of ions and still exist in the crude copper sulfate after crystallization, a certain amount of hydrogen peroxide is added to the reactor for oxidation, and then Na2CO3 solution is added to adjust the solution pH to 3.5-4.0, so that Fe 3+ Fe(OH)3 precipitates are formed and then removed, while Pb 2+ Ions and AsO2 - A precipitate is formed and the overall reaction equation is as follows: ; Wherein in the above step 4, the copper sulfate solution after impurity removal is input into the inner cylinder 2 through the liquid inlet 31 on the cover plate 3, and heated and evaporated by the heating plate 22. At the same time, the stirring motor 9 on the fixed frame 8 drives the stirring shaft 11 to rotate through the coupling 10, and the stirring shaft 11 stirs the solution through the stirring blades 12 thereon, and keeps the solution evenly heated to increase the concentration of copper sulfate. When the solution reaches the precipitation concentration, copper sulfate begins to precipitate in the form of crystals. At this time, heating is stopped, and the cooling pipe 15 is connected to the cooling circulation system through the liquid inlet interface 16 and the liquid outlet interface 17. The solution is quickly cooled by the cooling pipe 15 to reduce the solubility of copper sulfate and promote crystal precipitation, which also helps to improve the quality of the crystals. During the cooling process, the crystals have enough time to arrange and grow in an orderly manner, thereby forming crystals with neat and regular geometric shapes. Such orderly arranged crystals usually have higher purity and better physical properties; In the above step 5, the hydraulic cylinder 6 on the fixing plate 5 is connected to the fixing frame 8 through the top column 7 and the connecting seat 32, and the fixing frame 8 is moved up along the guide column 4 together with the cover plate 3, and the evaporation crystallization component is moved out of the inner cylinder 2, which is convenient for subsequent centrifugal separation and cleaning of the copper sulfate crystals attached to the surfaces of the stirring shaft 11 and the cooling tube 15. The inner cylinder 2 and the outer cylinder 1 are closed, and the centrifugal motor 26 drives the driving wheel 27 to rotate, and the driving wheel 27 drives the driven wheel 23 to rotate through the synchronous belt 28, thereby driving the inner cylinder 2 to rotate at a high speed. Under the high-speed rotation of the inner cylinder 2, The internal copper sulfate solution rotates and generates pressure on the cylinder wall under the action of centrifugal force. The sealing cover 20 squeezes the spring 19 under the action of its own centrifugal force and solution pressure. The spring 19 compresses the sealing cover 20 to move into the installation groove 18, leaking out the drainage channel 21 to make it communicate with the inner cylinder 2. The solution is discharged through the drainage channel 21 and discharged through the drainage port 29 to achieve centrifugal separation of copper sulfate crystals. After the centrifugation is completed, the sealing cover 20 is reset under the action of the spring 19, and the crystals that may be blocked in the installation groove 18 are pushed out and sealed. In the above step 6, the mother liquor after centrifugal separation can be returned to the device for recycling to improve the utilization rate of the raw materials. If the copper sulfate concentration in the mother liquor is low, it can also be sent to the wastewater treatment system for treatment; In the above step seven, the separated copper sulfate crystals are sent to a dryer for drying to remove residual moisture therein. The dried copper sulfate crystals can be packaged and stored after quality inspection.

[0021] Based on the above, the advantages of the present invention are: when the present invention is used to purify copper sulfate, the crude copper sulfate is first dissolved in an appropriate amount of water to form a copper sulfate solution, and then the large particle impurities and suspended matter in the solution are removed by filtering and precipitation. Since the crude copper sulfate is a product of concentrated crystallization of an electrolyte, the electrolyte contains a large amount of iron, arsenic and lead impurities, which exist in the waste liquid in the form of ions and still exist in the crude copper sulfate after crystallization. After a certain amount of hydrogen peroxide is added to the reactor for oxidation, a Na2CO3 solution is added to adjust the pH value of the solution to 3.5-4.0, so that Fe 3+ Fe(OH)3 precipitates are formed and then removed, while Pb 2+ Ions and AsO2 - A precipitate is formed and the overall reaction equation is as follows:

[0022] The copper sulfate solution after impurity removal is input into the inner cylinder 2 through the liquid inlet 31 on the cover plate 3, and is heated and evaporated by the heating plate 22. At the same time, the stirring motor 9 on the fixed frame 8 drives the stirring shaft 11 to rotate through the coupling 10. The stirring shaft 11 stirs the solution through the stirring blades 12 thereon to keep the solution evenly heated to increase the concentration of copper sulfate. When the solution reaches the precipitation concentration, copper sulfate begins to precipitate in the form of crystals. At this time, the heating is stopped, and the cooling pipe 15 is connected to the cooling circulation system through the liquid inlet interface 16 and the liquid outlet interface 17. The solution is quickly cooled by the cooling pipe 15 to reduce the solubility of copper sulfate and promote crystallization. The crystals are then separated and the crystals are then separated, which helps to improve the quality of the crystals. During the cooling process, the crystals have enough time to be arranged and grown in an orderly manner, thereby forming crystals with neat and regular geometric shapes. Such orderly arranged crystals usually have higher purity and better physical properties. The hydraulic cylinder 6 on the fixed plate 5 is connected to the fixed frame 8 through the top column 7 and the connecting seat 32, and the hydraulic cylinder 6 and the cover plate 3 are moved up along the guide column 4 to move the evaporation crystallization component out of the inner cylinder 2, which is convenient for subsequent centrifugal separation and cleaning of the copper sulfate crystals attached to the surfaces of the stirring shaft 11 and the cooling tube 15. The inner cylinder 2 and the outer cylinder 1 are closed, and the centrifugal motor 26 drives the driving wheel 27 to rotate. The driving wheel 27 drives the driven wheel 23 to rotate through the synchronous belt 28, thereby driving the inner cylinder 2 to rotate at a high speed. When the inner cylinder 2 rotates at a high speed, the copper sulfate solution inside rotates and generates pressure on the cylinder wall under the action of centrifugal force. The sealing cover 20 squeezes the spring 19 under the action of its own centrifugal force and the pressure of the solution. The spring 19 compresses the sealing cover 20 to move into the installation groove 18, leaking out the drainage channel 21 to make it communicate with the inner cylinder 2. The solution is discharged through the drainage channel 21 and discharged through the drainage port 29, thereby realizing the centrifugal separation of the copper sulfate crystals. After the centrifugation is completed, the copper sulfate crystals are discharged through the discharge port 24. The sealing cover 20 completes the re-engagement under the action of the spring 19. The mother liquor after centrifugal separation can be returned to the device for recycling to improve the utilization rate of raw materials. If the copper sulfate concentration in the mother liquor is low, it can also be sent to the wastewater treatment system for treatment. The separated copper sulfate crystals are sent to the dryer for drying to remove residual moisture. After the dried copper sulfate crystals are tested for quality, they can be packaged and stored. The connecting rod 13 and the retaining frame 14 are used to fix the cooling pipe 15. The first valve 25 and the second valve 30 are used to control the conduction and closing of the discharge port 24 and the discharge port 29, respectively.

[0023] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for purifying high-purity copper sulfate, comprising an outer cylinder (1), characterized in that: An inner cylinder (2) is arranged inside the outer cylinder (1), a mounting groove (18) is provided on the inner wall of the inner cylinder (2), a spring (19) is fixedly connected inside the mounting groove (18), a sealing cover (20) is fixedly connected to the other end of the spring (19), and the sealing cover (20) is sleeved in the mounting groove (18), a drainage hole (21) is provided on the outer wall of the inner cylinder (2) corresponding to the mounting groove (18), and the drainage hole (21) is conductively connected to the mounting groove (18), a cover plate (3) is provided on the upper surface of the outer cylinder (1), a connecting rod (13) is fixedly connected to the lower surface of the cover plate (3), the other end of the connecting rod (13) is fixedly connected to a retaining frame (14), and a cooling pipe (15) is fixedly connected to the retaining frame (14).

2. A purification device for high-purity copper sulfate according to claim 1, characterized in that: The upper surface of the outer cylinder (1) is fixedly connected to a guide column (4), and the cover plate (3) is sleeved on the guide column (4). The upper surface of the cover plate (3) is fixedly connected to a fixing frame (8), and the fixing frame (8) is fixedly connected to a stirring motor (9). The output end of the stirring motor (9) is fixedly connected to a coupling (10), and the other end of the coupling (10) is fixedly connected to a stirring shaft (11), and the stirring shaft (11) is sleeved on the cover plate (3), and the stirring shaft (11) is fixedly connected to a stirring blade (12).

3. A purification device for high-purity copper sulfate according to claim 2, characterized in that: A fixing plate (5) is provided at the top end of the cover plate (3), and the fixing plate (5) is fixedly connected to the guide column (4); a hydraulic cylinder (6) is fixedly connected to the upper surface of the fixing plate (5); an output end of the hydraulic cylinder (6) is fixedly connected to a top column (7); a connecting seat (32) is fixedly connected to the upper surface of the fixing frame (8), and the other end of the top column (7) is fixedly connected to the connecting seat (32).

4. A purification device for high-purity copper sulfate according to claim 2, characterized in that: A heating plate (22) is fixedly connected to one end of the stirring shaft (11).

5. A purification device for high-purity copper sulfate according to claim 1, characterized in that: The lower surface of the inner cylinder (2) is provided with a discharge port (24), and the discharge port (24) is sleeved on the outer cylinder (1). A first valve (25) is fixedly connected to the discharge port (24). A centrifugal motor (26) is provided on one side of the discharge port (24). A driving wheel (27) is fixedly connected to the output end of the centrifugal motor (26). A synchronous belt (28) is sleeved on the driving wheel (27). A driven wheel (23) is fixedly connected to the discharge port (24), and the synchronous belt (28) is sleeved on the driven wheel (23).

6. A purification device for high-purity copper sulfate according to claim 1, characterized in that: The upper surface of the cover plate (3) is fixedly connected with a liquid inlet interface (16), a liquid outlet interface (17) and a liquid inlet (31), and the liquid inlet interface (16) and the liquid outlet interface (17) are both conductively connected to the cooling pipe (15), and liquid discharge ports (29) are provided on the outer walls on both sides of the outer cylinder (1), and a second valve (30) is fixedly connected to the liquid discharge port (29).

7. A purification process for high-purity copper sulfate, comprising step 1, dissolving raw materials; step 2, pretreatment; step 3, purification reaction; step 4, evaporation and crystallization; step 5, centrifugal separation; step 6, mother liquor treatment; step 7, drying and packaging; characterized in that: Wherein in the above step 1, the crude copper sulfate is dissolved in an appropriate amount of water to form a copper sulfate solution; In the above step 2, large particles of impurities and suspended matter in the solution are removed by filtering and precipitation; In the above step 3, hydrogen peroxide is added to the reaction kettle to oxidize the copper sulfate solution to remove iron, arsenic and lead impurities in the solution and improve the purity of the copper sulfate; In the above step 4, the solution is heated by the heating plate (22) for evaporation and concentration, and is rapidly cooled and crystallized by the cooling tube (15); In the above step 5, the inner cylinder (2) is driven to rotate by the centrifugal motor (26) to centrifugally separate the copper sulfate crystals; In the above step 6, the mother liquor after centrifugal separation can be returned to the device for recycling to improve the utilization rate of the raw materials. If the copper sulfate concentration in the mother liquor is low, it can also be sent to the wastewater treatment system for treatment; In the above step seven, the separated copper sulfate crystals are sent to a dryer for drying to remove residual moisture therein. The dried copper sulfate crystals can be packaged and stored after quality inspection.

8. A purification process for high-purity copper sulfate according to claim 7, characterized in that: In the step 3, since the crude copper sulfate is a product of concentrated crystallization of the electrolyte, the electrolyte contains a large amount of iron, arsenic and lead impurities, which exist in the waste liquid in the form of ions and still exist in the crude copper sulfate after crystallization, a certain amount of hydrogen peroxide is added to the reactor for oxidation, and then Na2CO3 solution is added to adjust the solution pH to 3.5-4.0, so that Fe 3+ Fe(OH)3 precipitates are formed and then removed, while Pb 2+ Ions and AsO2 - A precipitate is formed and the overall reaction equation is as follows: 。 9. A purification process for high-purity copper sulfate according to claim 7, characterized in that: In the step 4, the copper sulfate solution after impurity removal is introduced into the inner cylinder (2) through the liquid inlet (31) on the cover plate (3), and is heated and evaporated by the heating plate (22). At the same time, the stirring motor (9) on the fixed frame (8) drives the stirring shaft (11) to rotate through the coupling (10), and the stirring shaft (11) stirs the solution through the stirring blades (12) thereon to keep the solution evenly heated to increase the concentration of copper sulfate. When the solution reaches the precipitation concentration, copper sulfate begins to precipitate in the form of crystals. At this time, the heating is stopped, and the cooling pipe (15) is connected to the cooling circulation system through the liquid inlet interface (16) and the liquid outlet interface (17). The solution is quickly cooled through the cooling pipe (15) to reduce the solubility of copper sulfate and promote crystal precipitation, which also helps to improve the quality of the crystals. During the cooling process, the crystals have enough time to arrange and grow in an orderly manner, thereby forming crystals with neat and regular geometric shapes. Such orderly arranged crystals usually have higher purity and better physical properties.

10. A purification process for high-purity copper sulfate according to claim 7, characterized in that: In the step 5, the hydraulic cylinder (6) on the fixed plate (5) is connected to the fixed frame (8) via the top column (7) and the connecting seat (32), and the hydraulic cylinder (6) and the cover plate (3) are moved upward along the guide column (4), so that the evaporation crystallization component is moved out of the inner cylinder (2), which is convenient for subsequent centrifugal separation and cleaning of the copper sulfate crystals attached to the surfaces of the stirring shaft (11) and the cooling tube (15). The inner cylinder (2) and the outer cylinder (1) are sealed, and the centrifugal motor (26) drives the driving wheel (27) to rotate. The driving wheel (27) drives the driven wheel (23) to rotate through the synchronous belt (28), thereby driving the inner cylinder (2) to rotate in height. The inner cylinder (2) is at Under high-speed rotation, the internal copper sulfate solution rotates and generates pressure on the cylinder wall under the action of centrifugal force. The sealing cover (20) squeezes the spring (19) under the action of its own centrifugal force and the pressure of the solution. The spring (19) compresses the sealing cover (20) and moves it into the installation groove (18), leaking out the drainage channel (21) so that it is connected with the inner cylinder (2). The solution is discharged through the drainage channel (21) and discharged through the drainage port (29), thereby realizing centrifugal separation of copper sulfate crystals. After the centrifugation is completed, the sealing cover (20) is reset under the action of the spring (19), and the crystals that may be blocked in the installation groove (18) are pushed out and sealed.

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