Copper sulfate recovery system

Abstract

The utility model relates to the technical field of circuit board processing, in particular to a copper sulfate recovery system which comprises a micro-etching liquid tank, a crystallization tank and a plate heat exchanger, the micro-etching liquid tank and the crystallization tank are connected with the plate heat exchanger through a continuous input type circulation assembly, and a transverse strip block is fixedly installed on the outer wall of the top side of the crystallization tank. A limiting mounting groove is formed in the transverse strip block, a reciprocating type driving assembly is mounted in the limiting mounting groove, a conveying scraper is mounted on the reciprocating type driving assembly, a stirring part is rotatably mounted at the top of the conveying scraper, a driving gear is fixedly mounted at the top of the stirring part, and the driving gear is in meshed connection with a positioning rack fixed at the top of the crystallization tank; while scraping and conveying of copper sulfate crystals are achieved, the stirring part can be made to rotate, a large number of nuclei are promoted to aggregate and grow, crystallization of the copper sulfate crystals is better facilitated, and meanwhile the situation that the solubility of copper sulfate is increased and the recovery effect of the copper sulfate crystals is affected due to the fact that the temperature of micro-etching liquid is too high can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a copper sulfate recovery system. Background Art

[0002] Since the sulfuric acid / hydrogen peroxide micro-etching solution continuously dissolves the copper surface during the production process, the copper ion concentration in the micro-etching solution increases. In order to maintain a stable micro-etching efficiency, sulfuric acid and hydrogen peroxide need to be added, which also increases the sulfate ion concentration in the solution. 2+ Concentration and S04 2- When the concentration product is greater than the solubility concentration product of copper sulfate, copper sulfate crystals are formed. The lower the concentration, the more conducive it is to the formation of nuclear crystals.

[0003] However, since the micro-etching of the copper surface by sulfuric acid / hydrogen peroxide is an exothermic reaction, the bath temperature is maintained at about 40°C, which increases the solubility of CuS04, making it less conducive to the production of copper sulfate crystals. In addition, a large number of nuclear crystals are relatively dispersed, affecting the crystallization effect and efficiency of the copper sulfate crystals.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In order to overcome the technical defects of the prior art, the utility model provides a copper sulfate recovery system, which can prevent the solubility of copper sulfate from increasing due to the excessively high temperature of the micro-etching solution, thereby affecting the recovery effect of copper sulfate crystals. At the same time, while achieving the scraping and transportation of copper sulfate crystals, the stirring part can be rotated to promote the aggregation and growth of a large number of nuclear crystals, which is more conducive to the crystallization of copper sulfate crystals.

[0006] The technical solution adopted by the utility model is: it includes a micro-etching liquid tank, a crystallization tank and a plate heat exchanger, the micro-etching liquid tank and the crystallization tank are connected to the plate heat exchanger through the continuous input circulation component, the transverse bar is fixedly installed on the outer wall of the top side of the crystallization tank, the transverse bar is provided with a limited installation groove, the reciprocating drive component is installed in the limited installation groove, the conveying scraper is installed on the reciprocating drive component, the conveying scraper is located in the crystallization tank, and the conveying scraper is closely connected to the inner bottom of the crystallization tank, the top of the conveying scraper is rotatably installed with the stirring part, the top of the stirring part is fixedly installed with the driving gear, and the driving gear is meshed with the positioning rack fixed on the top of the crystallization tank.

[0007] Preferably, in order to control the water pump to be turned on, the liquid in the micro-etching liquid tank can be input into the plate heat exchanger through the liquid extraction pipe and the first introduction pipe, and at the same time, the liquid in the plate heat exchanger can enter the crystallization tank through the second introduction pipe, the continuous input circulation component includes the water pump, and the liquid extraction pipe and the first introduction pipe are installed on the water pump, one end of the liquid extraction pipe is connected to the micro-etching liquid tank, one end of the first introduction pipe is fixedly connected to the first liquid inlet end of the plate heat exchanger, and the first liquid outlet end of the plate heat exchanger is connected to the crystallization tank through the second introduction pipe.

[0008] Preferably, in order to overflow the liquid in the crystallization tank, the liquid in the crystallization tank can flow back to the plate heat exchanger through the first reflux pipe, and the liquid in the plate heat exchanger can flow back into the micro-etching liquid tank through the second reflux pipe, the second liquid inlet end of the plate heat exchanger is connected to the crystallization tank through the first reflux pipe, and the second liquid outlet end of the plate heat exchanger is connected to the micro-etching liquid tank through the second reflux pipe.

[0009] Preferably, in order to control the opening of the driving motor so that the transverse threaded rod can rotate in the limiting mounting groove through the rotating joint, the reciprocating drive assembly includes the driving motor and the transverse threaded rod, the driving motor is fixed on the inner wall of one end of the limiting mounting groove, the transverse threaded rod is rotatably installed on the inner wall of the other end of the limiting mounting groove through the rotating joint, and one end of the transverse threaded rod is fixedly connected to the output shaft of the driving motor.

[0010] Preferably, in order to drive the threaded slider to slide in the limiting mounting groove by controlling the rotation of the transverse threaded rod, the threaded slider is installed on the transverse threaded rod, and the threaded slider is slidably engaged in the limiting mounting groove.

[0011] Preferably, in order to enable the threaded slider to drive the conveying scraper to move through the bent connecting rod, the bent connecting rod is fixedly mounted on the threaded slider, and the conveying scraper is fixed to one end of the bent connecting rod.

[0012] Preferably, in order to collect copper sulfate crystals through the crystallization collection tank, the crystallization collection tank is fixedly installed at the bottom of the crystallization tank, and the crystallization collection tank is connected to one end of the bottom of the crystallization tank.

[0013] Preferably, in order to cool the liquid in the crystallization tank through the cooling loop, the cooling loop is fixedly installed in the crystallization tank.

[0014] The beneficial effects of the utility model are as follows: through the continuous input circulation component, the micro-etching liquid can be circulated and cooled to avoid the micro-etching liquid temperature being too high so that the solubility of copper sulfate increases and the copper sulfate crystallization effect is affected; at the same time, through the reciprocating drive component, the conveying scraper can be moved to realize the scraping and conveying of copper sulfate crystals, and the stirring part can be driven to move. Under the action of the driving gear and the positioning rack, the stirring part is rotated, which can promote the aggregation and growth of a large number of nuclear crystals, which is more conducive to the crystallization of copper sulfate crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the continuous input circulation component of the utility model.

[0017] Figure 3 It is a schematic diagram of the top view of the crystallization tank of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the reciprocating drive assembly of the utility model.

[0019] Figure 5 It is a schematic diagram of the installation structure of the stirring part of the utility model.

[0020] Explanation of the accompanying drawings: In the figure: 1. Micro-etching liquid tank; 2. Crystallization tank; 3. Plate heat exchanger; 4. Continuous input circulation component; 401. Water pump; 402. Liquid extraction pipe; 403. First inlet pipe; 404. Second inlet pipe; 405. First return pipe; 406. Second return pipe; 5. Horizontal bar; 6. Reciprocating drive component; 601. Drive motor; 602. Horizontal threaded rod; 603. Rotating joint; 604. Threaded slider; 605. Bent connecting rod; 7. Conveying scraper; 8. Stirring part; 9. Drive gear; 10. Positioning rack; 11. Crystallization collection tank; 12. Cooling ring pipe. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] like Figure 1-Figure 5As shown, the present embodiment provides a copper sulfate recovery system, including a micro-etching liquid tank 1, a crystallization tank 2 and a plate heat exchanger 3. The micro-etching liquid tank 1 and the crystallization tank 2 are connected to the plate heat exchanger 3 through a continuous input circulation component 4. Through the continuous input circulation component 4, the liquid in the micro-etching liquid tank 1 is input into the plate heat exchanger 3 for pre-cooling. A cooling loop 12 is fixedly installed in the crystallization tank 2 to facilitate secondary cooling of the liquid in the crystallization tank 2. A transverse bar 5 is fixedly installed on the outer wall of the top side of the crystallization tank 2. A limited installation groove is provided on the transverse bar 5. A reciprocating drive component 6 is installed in the limited installation groove. The reciprocating drive component 6 is installed There is a conveying scraper 7, which is located in the crystallization tank 2 and is closely connected to the inner bottom of the crystallization tank 2. The reciprocating drive component 6 is controlled to move the conveying scraper 7 in the crystallization tank 2 to scrape and convey the crystals settled at the bottom of the crystallization tank 2. A stirring part 8 is rotatably installed on the top of the conveying scraper 7, and a driving gear 9 is fixedly installed on the top of the stirring part 8. The driving gear 9 is meshed and connected with a positioning rack 10 fixed on the top of the crystallization tank 2. When the conveying scraper 7 moves, the stirring part 8 moves laterally, so that the driving gear 9 meshes and rolls on the positioning rack 10, so that the stirring part 8 rotates to achieve stirring of the liquid in the crystallization tank 2.

[0023] The continuous input circulation component 4 includes a water pump 401, on which a liquid extraction pipe 402 and a first introduction pipe 403 are installed. One end of the liquid extraction pipe 402 is connected to the micro-etching liquid tank 1, and one end of the first introduction pipe 403 is fixedly connected to the first liquid inlet end of the plate heat exchanger 3. The first liquid outlet end of the plate heat exchanger 3 is connected to the crystallization tank 2 through the second introduction pipe 404, and the second liquid inlet end of the plate heat exchanger 3 is connected to the crystallization tank 2 through the first reflux pipe 405. The second liquid outlet end of 3 is connected to the micro-etching liquid tank 1 through the second reflux pipe 406, and the water pump 401 is controlled to start, so that the liquid in the micro-etching liquid tank 1 passes through the plate heat exchanger 3 and enters the crystallization tank 2 through the liquid extraction pipe 402, the first introduction pipe 403 and the second introduction pipe 404, and at the same time, the upper layer of the crystallization tank 2 overflows, passes through the first reflux pipe 405 and the second reflux pipe 406, and flows through the plate heat exchanger 3 for heat recovery before flowing into the micro-etching liquid tank 1.

[0024] The reciprocating drive assembly 6 includes a drive motor 601 and a transverse threaded rod 602. The drive motor 601 is fixed on the inner wall of one end of the limit installation groove. The transverse threaded rod 602 is rotatably installed on the inner wall of the other end of the limit installation groove through a rotating joint 603. One end of the transverse threaded rod 602 is fixedly connected to the output shaft of the drive motor 601. A threaded slider 604 is installed on the transverse threaded rod 602. The threaded slider 604 is slidably engaged in the limit installation groove. A bent connecting rod 605 is fixedly installed on the threaded slider 604. The conveying scraper 7 is fixed at one end of the bent connecting rod 605, and a crystal collecting groove 11 is fixedly installed at the bottom of the crystallization groove 2, and the crystal collecting groove 11 is connected to one end of the bottom of the crystallization groove 2. When in use, the driving motor 601 is controlled to be turned on, so that the transverse threaded rod 602 rotates in the limiting installation groove through the rotating joint 603, driving the threaded slider 604 to slide in the limiting installation groove, so as to facilitate the conveying scraper 7 to move horizontally through the bent connecting rod 605, so as to realize the scraping and conveying of the crystals at the inner bottom of the crystallization groove 2.

[0025] When the utility model is used, a small amount of the tank liquid of the micro-etching tank 1 is continuously injected into the plate heat exchanger for pre-cooling, and then discharged into the crystallization tank 2 and cooled to about 15°C through the cooling loop 12 in the crystallization tank 2. Under the action of the stirring part 8, it is properly stirred and crystallized into copper sulfate and deposited on the bottom of the crystallization tank 2. The tank liquid overflows from the upper layer of the crystallization tank 2 and recovers part of the heat energy through the plate heat exchanger, and then returns to the micro-etching tank 1 for continued use to maintain the etching efficiency. During the operation, hydrogen peroxide and stabilizer are quantitatively added to the micro-etching tank 1, and sulfuric acid is quantitatively added to the crystallization tank 2 to improve the copper sulfate crystallization effect. The copper sulfate crystals at the bottom of the crystallization tank 2 are transported to the crystallization collection tank 11 under the action of the conveying scraper 7.

[0026] The above shows and describes the basic principles and main features of the invention and the advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. A copper sulfate recovery system, comprising a micro-etching tank (1), a crystallization tank (2) and a plate heat exchanger (3), characterized in that: The micro-etching liquid tank (1) and the crystallization tank (2) are both connected to the plate heat exchanger (3) via a continuous input circulation component (4); a transverse bar (5) is fixedly mounted on the top outer wall of the crystallization tank (2); a limit mounting groove is provided on the transverse bar (5); a reciprocating drive component (6) is mounted in the limit mounting groove; a conveying scraper (7) is mounted on the reciprocating drive component (6); the conveying scraper (7) is located in the crystallization tank (2), and the conveying scraper (7) is closely connected to the inner bottom of the crystallization tank (2); a stirring portion (8) is rotatably mounted on the top of the conveying scraper (7); a driving gear (9) is fixedly mounted on the top of the stirring portion (8), and the driving gear (9) is meshedly connected to a positioning rack (10) fixed on the top of the crystallization tank (2).

2. The copper sulfate recovery system according to claim 1, characterized in that: The continuous input circulation component (4) comprises a water pump (401), on which a liquid extraction pipe (402) and a first introduction pipe (403) are installed, one end of the liquid extraction pipe (402) is connected to the micro-etching liquid tank (1), one end of the first introduction pipe (403) is fixedly connected to a first liquid inlet end of the plate heat exchanger (3), and the first liquid outlet end of the plate heat exchanger (3) is connected to the crystallization tank (2) via a second introduction pipe (404).

3. The copper sulfate recovery system according to claim 2, characterized in that: The second liquid inlet end of the plate heat exchanger (3) is connected to the crystallization tank (2) through a first reflux pipe (405), and the second liquid outlet end of the plate heat exchanger (3) is connected to the micro-etching liquid tank (1) through a second reflux pipe (406).

4. The copper sulfate recovery system according to claim 1, characterized in that: The reciprocating drive assembly (6) comprises a drive motor (601) and a transverse threaded rod (602), wherein the drive motor (601) is fixed to the inner wall of one end of the limit installation groove, and the transverse threaded rod (602) is rotatably mounted on the inner wall of the other end of the limit installation groove via a rotating joint (603), and one end of the transverse threaded rod (602) is fixedly connected to the output shaft of the drive motor (601).

5. The copper sulfate recovery system according to claim 4, characterized in that: A threaded slider (604) is installed on the transverse threaded rod (602), and the threaded slider (604) is slidably engaged in the position-limiting installation groove.

6. The copper sulfate recovery system according to claim 5, characterized in that: A bent connecting rod (605) is fixedly mounted on the threaded slider (604), and the conveying scraper (7) is fixed to one end of the bent connecting rod (605).

7. The copper sulfate recovery system according to claim 1, characterized in that: A crystallization collection tank (11) is fixedly installed at the bottom of the crystallization tank (2), and the crystallization collection tank (11) is connected to one end of the bottom of the crystallization tank (2).

8. The copper sulfate recovery system according to claim 1, characterized in that: A cooling ring pipe (12) is fixedly installed in the crystallization tank (2).

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