Efficient and energy-saving electrolytic copper foil dissolving tank system

Abstract

The invention discloses an efficient and energy-saving electrolytic copper foil dissolving tank system which comprises a spraying type copper dissolving tank and a heat exchanger communicated with the copper dissolving tank, the bottom of the copper dissolving tank is communicated with a solution circulating pump, a primary side inlet of the heat exchanger is communicated with an outlet of the solution circulating pump, a secondary side inlet end of the heat exchanger is communicated with a liquid supplementing pump, and a secondary side inlet end of the liquid supplementing pump is communicated with an outlet of the liquid supplementing pump. The inlet end of the liquid supplementing pump is communicated with a dirty liquid tank, and the lower end of the copper dissolving tank is communicated with an overflow pipe; heat of a self-circulation solution of the spraying type copper dissolving tank is fully utilized, the efficient heat exchanger is adopted, full heat exchange between a high-temperature solution and a low-temperature copper supplementing solution in the copper dissolving tank is achieved, the temperature of the copper supplementing solution is increased, the temperature of the copper dissolving tank is increased, and therefore the copper dissolving rate is increased, the copper raw material structure proportion is optimized, and cost is saved; in addition, due to the fact that the temperature of the copper dissolving tank rises, the copper dissolving speed can be met only by starting one pump instead of starting two pumps originally from a circulating pump, and energy is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrolytic copper foil processing, and in particular relates to an electrolytic copper foil dissolving tank system with high efficiency and energy saving. Background Art

[0002] The main purpose of the copper dissolving process is to convert solid copper materials into water-soluble copper ions through chemical reactions, providing the necessary raw materials for the production of electrolytic copper foil. In the copper dissolving process, copper materials are usually reacted with sulfuric acid and oxygen in the air in a copper dissolving tank to generate copper sulfate solution. The basic chemical equation involved in this process includes the reaction of copper with oxygen to generate copper oxide, and then the reaction of copper oxide with sulfuric acid to generate copper sulfate and water.

[0003] As in the prior art, the patent document application number is 202310739911.5, which discloses an accelerated copper dissolution system for electrolytic copper foil production, including a raw foil machine, a copper dissolving tank, and a dirty liquid tank. An acid mist exhaust pipe is provided between the raw foil machine and the copper dissolving tank, and the acid mist exhaust pipe is connected to an external air pump. A first overflow pipe is provided between the raw foil machine and the dirty liquid tank and the copper dissolving tank. The invention directly sprays and dissolves copper on the return liquid part of the electrolyte of the raw foil machine, omitting the operation of pumping electrolyte from the dirty liquid tank to the copper dissolving tank and the process of high-temperature heating of the dirty liquid. Since a large amount of oxygen is generated in the foil process, the oxygen concentration in the electrolyte return liquid is high, which is conducive to copper dissolution. At the same time, there is no high-temperature steam heating, which reduces the probability of failure of the additive.

[0004] However, in the solution circulation process of the prior art, the solution temperature of the low-level dirty liquid tank is controlled at about 53°C-57°C, the temperature in the copper dissolving tank is controlled at about 70°C-76°C, and the temperature of the low-temperature dirty liquid tank is 13°C-23°C lower than that of the copper dissolving tank. Although the copper dissolving process is an exothermic reaction, the continuous low-temperature solution is pumped into the copper dissolving tank, resulting in the solution temperature in the copper dissolving tank being unable to rise further, thereby affecting the copper dissolving rate. Therefore, we need to propose an efficient and energy-saving electrolytic copper foil copper dissolving tank system to solve the above-mentioned problems, so that it can increase the temperature of the copper replenishing solution and increase the copper dissolving rate. Summary of the invention

[0005] The object of the present invention is to provide an efficient and energy-saving electrolytic copper foil dissolving tank system, which can increase the temperature of the copper replenishing solution and increase the copper dissolving rate to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A high-efficiency and energy-saving electrolytic copper foil copper dissolving tank system comprises a spray-type copper dissolving tank and a heat exchanger connected to the copper dissolving tank, the bottom of the copper dissolving tank is connected to a solution circulation pump, the primary side inlet of the heat exchanger is connected to the outlet of the solution circulation pump, the secondary side inlet end of the heat exchanger is connected to a replenishing pump, the inlet end of the replenishing pump is connected to a dirty liquid tank, the lower end of the copper dissolving tank is connected to an overflow pipe, one end of the overflow pipe is connected to the inside of the dirty liquid tank, the primary side outlet pipe of the heat exchanger is connected to the overflow pipe on the copper dissolving tank, the secondary side outlet pipe of the heat exchanger is connected to the upper end of the copper dissolving tank, and the outlet of the solution circulation pump is also connected to the upper end of the copper dissolving tank.

[0008] Preferably, a second flow meter and a second regulating valve are sequentially arranged on the connecting pipeline between the two side inlets of the heat exchanger and the liquid replenishment pump, and the second flow meter is close to the heat exchanger. The second regulating valve automatically adjusts the valve opening according to the set value and actual value of the second flow meter, and a temperature sensor is arranged on the pipeline connecting the two side outlets of the heat exchanger and the copper dissolving tank.

[0009] Preferably, a first flow meter and a first regulating valve are provided on a pipeline connecting a side inlet of the heat exchanger and the solution circulation pump, and the first flow meter is close to the solution circulation pump.

[0010] Preferably, the first flow meter dynamically tracks the second flow meter, and the second regulating valve automatically adjusts the valve opening according to the actual value of the first flow meter.

[0011] Preferably, the lower end of the copper dissolving tank is respectively provided with flange openings g, e, c and f, the flange openings g and e are located on the same side of the copper dissolving tank, and the diameter of the flange opening e is greater than the diameter of the flange opening g.

[0012] Preferably, a first flange port corresponding to the flange port g is provided at one end of the solution circulation pump, the first flange port is connected to the flange port g by bolts, and a sealing ring is provided between the first flange port and the flange port g.

[0013] Preferably, a plurality of annular spray pipes containing a plurality of spray holes are provided on the inner top of the copper dissolving tank, the plurality of annular spray pipes are equidistantly distributed up and down, and the plurality of annular spray pipes are connected to the liquid outlet of the solution circulation pump.

[0014] Preferably, a vertical main spray pipe containing a plurality of spray holes is provided inside the copper dissolving tank, a reinforcing rib plate is welded on the vertical main spray pipe, the upper end of the reinforcing rib plate is welded to the top of the copper dissolving tank, the lower end of the reinforcing rib plate is connected to the bottom of the copper dissolving tank through a support frame, and the upper end of the vertical main spray pipe is connected to a connecting pipe b1 for connecting to the outlet of the solution circulation pump.

[0015] Preferably, the lower end of the copper dissolving tank is provided with an overflow port d for communicating with an overflow pipe, and the high-concentration solution in the copper dissolving tank overflows to the low-position dirty liquid tank, and the low-concentration solution in the dirty liquid tank is pumped into the heat exchanger by a replenishing pump, and enters the copper dissolving tank after heat exchange in the heat exchanger.

[0016] Preferably, a liquid baffle plate is provided at the inlet of the solution circulation pump, a filter screen is provided on the liquid baffle plate, and a through hole for installing the filter screen is opened on the liquid baffle plate.

[0017] The invention provides an efficient and energy-saving electrolytic copper foil dissolving tank system, which has the following advantages compared with the prior art:

[0018] 1. The present invention makes full use of the heat of the self-circulating solution of the spray-type copper dissolving tank, adopts an efficient heat exchanger, realizes sufficient heat exchange between the high-temperature solution of the copper dissolving tank and the low-temperature copper supplement solution, increases the temperature of the copper supplement solution, increases the temperature of the copper dissolving tank, thereby increasing the copper dissolving rate, optimizing the copper raw material structure ratio, and saving costs. In addition, due to the increase in the temperature of the copper dissolving tank, the original self-circulating pump only needs to open one pump to meet the copper dissolving rate, saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a system block diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the copper dissolving tank of the present invention;

[0021] In the figure: 1. copper dissolving tank; 2. solution circulation pump; 3. first flow meter; 4. first regulating valve; 5. liquid replenishing pump; 6. dirty liquid tank; 7. second regulating valve; 8. second flow meter; 9. heat exchanger; 10. temperature sensor; 11. vertical main spray pipe; 12. annular spray pipe; 13. reinforcing rib plate; 14. support frame; 15. flange port e; 16. flange port g; 17. overflow port d; 18. flange port f; 19. flange port c. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying 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, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] The present invention provides Figure 1-2The shown is a high-efficiency and energy-saving electrolytic copper foil copper dissolving tank system, comprising a spray-type copper dissolving tank 1 and a heat exchanger 9 connected to the copper dissolving tank 1, the bottom of the copper dissolving tank 1 is connected to a solution circulation pump 2, the primary side inlet of the heat exchanger 9 is connected to the outlet of the solution circulation pump 2, the secondary side inlet end of the heat exchanger 9 is connected to a replenishing pump 5, the inlet end of the replenishing pump 5 is connected to a dirty liquid tank 6, the lower end of the copper dissolving tank 1 is connected to an overflow pipe, one end of the overflow pipe is connected to the interior of the dirty liquid tank 6, the primary side outlet pipe of the heat exchanger 9 is connected to the overflow pipe on the copper dissolving tank 1, the secondary side outlet pipe of the heat exchanger 9 is connected to the upper end of the copper dissolving tank 1, and the outlet of the solution circulation pump 2 is also connected to the upper end of the copper dissolving tank 1.

[0024] A second flow meter 8 and a second regulating valve 7 are sequentially arranged on the connecting pipeline between the two side inlets of the heat exchanger 9 and the liquid replenishing pump 5, and the second flow meter 8 is close to the heat exchanger 9. The second regulating valve 7 automatically adjusts the valve opening according to the set value and actual value of the second flow meter 8. A temperature sensor is arranged on the pipeline connecting the two side outlets of the heat exchanger 9 and the copper dissolving tank 1. The temperature of the solution entering the copper dissolving tank 1 is sensed in real time by the temperature sensor 10 to control the heat exchange temperature of the heat exchanger 9.

[0025] A first flow meter 3 and a first regulating valve 4 are provided on the pipeline connecting one side inlet of the heat exchanger 9 and the solution circulation pump 2, and the first flow meter 3 is close to the solution circulation pump 2 to facilitate controlling the rate of solution transmission between the heat exchanger 9 and the solution circulation pump 2.

[0026] The first flow meter 3 dynamically tracks the second flow meter 8, and the second regulating valve 7 automatically adjusts the valve opening according to the actual value of the first flow meter 3, so as to automatically control the transmission rate of the solution.

[0027] The lower end of the copper dissolving tank 1 is respectively provided with flange openings g16, e15, c19 and f18. The flange openings g16 and e15 are located on the same side of the copper dissolving tank 1, and the diameter of the flange opening e15 is larger than the diameter of the flange opening g16. The copper dissolving tank 1 is mainly based on a combination of chemical dissolution and physical stirring. The copper material is converted into soluble copper ions through a specific chemical reaction, and a mechanical device is used to improve the reaction efficiency and uniformity. This copper dissolving tank 1 uses common knowledge technology known in the art and will not be described in detail here.

[0028] One end of the solution circulation pump 2 is provided with a first flange port corresponding to the flange port g16. The first flange port and the flange port g16 are connected by bolts, and a sealing ring is provided between the first flange port and the flange port g16. The sealing ring is used to improve the sealing between the first flange port and the flange port g16 and reduce solution leakage. The first flange port and the flange port g16 are convenient for connection with the solution circulation pump 2.

[0029] The inner top of the copper dissolving tank 1 is provided with a plurality of annular spray pipes 12 containing a plurality of spray holes, and the plurality of annular spray pipes 12 are evenly distributed up and down, and the plurality of annular spray pipes 12 are connected with the liquid outlet of the solution circulation pump 2, so that the annular spray pipes 12 can be used to spray the solution in the copper dissolving tank 1 from different directions, so that the solution can be evenly sprayed in the copper dissolving tank 1.

[0030] A vertical main spray pipe 11 with a plurality of spray holes is arranged inside the copper dissolving tank 1, and a reinforcing rib plate 13 is welded on the vertical main spray pipe 11. The upper end of the reinforcing rib plate 13 is welded to the top of the copper dissolving tank 1, and the lower end of the reinforcing rib plate 13 is connected to the bottom of the copper dissolving tank 1 through a support frame 14. The upper end of the vertical main spray pipe 11 is connected to a connecting pipe b1 for connecting to the outlet of the solution circulation pump 2. The reinforcing rib plate 13 and the support frame 14 are used to improve the stability of the installation of the vertical main spray pipe 11.

[0031] The lower end of the copper dissolving tank 1 is provided with an overflow port d17 for communicating with an overflow pipe. The high-concentration solution in the copper dissolving tank 1 overflows to the low-level dirty liquid tank 6. The low-concentration solution in the dirty liquid tank 6 is pumped into the heat exchanger 9 by the replenishing pump 5, and enters the copper dissolving tank 1 after heat exchange in the heat exchanger 9. The high-concentration solution in the copper dissolving tank 1 is filtered and temperature-adjusted to become a clean copper sulfate solution and enter the raw foil tank. Electrolysis is carried out in the raw foil tank. After electrolysis, the copper sulfate solution changes from a high concentration to a low concentration, and then flows back to the low-level dirty liquid tank 6. In order to maintain a certain concentration range of copper concentration in the low-level dirty liquid tank 6, it must be continuously replaced with the high-concentration solution in the copper dissolving tank 1. The high-concentration solution in the copper dissolving tank 1 overflows to the low-level dirty liquid tank 6, and the low-concentration solution in the dirty liquid tank 6 is pumped into the copper dissolving tank 1 by the copper replenishing pump. The copper concentration in the dirty liquid tank 6 is kept stable by controlling the copper replenishing flow rate.

[0032] A liquid baffle plate (not shown) is provided at the inlet of the solution circulation pump 2, on which a filter screen is provided. A through hole for installing the filter screen is provided on the liquid baffle plate. The solution entering the solution circulation pump 2 is filtered through the filter screen to prevent the circulation pipeline from being blocked by debris.

[0033] During the specific operation, a branch pipe is welded on the self-circulating pump outlet solution pipeline connected to the flange port g at the bottom of the copper dissolving tank 1. The self-circulating pipeline branch pipe is connected to the primary high-temperature inlet of the heat exchanger 9, and the primary outlet pipe of the self-circulating pipeline branch pipe is connected to the overflow pipe of the copper dissolving tank 1. The low-temperature copper supplement solution passes through the secondary inlet of the heat exchanger 9 and enters the copper dissolving tank 1 after passing through the heat exchanger 9. In order to ensure the liquid level balance in the copper dissolving tank 1 and the dirty liquid tank 6, the following automatic control principles are included: the high-temperature solution at the primary inlet of the heat exchanger 9 is installed with a first flowmeter 3 and a first regulating valve 4, and the low-temperature copper supplement solution at the secondary side of the heat exchanger 9 is installed with a second flowmeter 8 and a second regulating valve 7. The first flowmeter 3 dynamically tracks the second flowmeter 8 and automatically adjusts the opening of the first regulating valve 4. According to the set value and actual value of the second flowmeter 8, the second regulating valve 7 automatically adjusts the opening. At the same time, in order to monitor the heating effect of the low-temperature copper supplement solution after heat exchange, a temperature sensor 10 is installed on the secondary outlet pipe of the heat exchanger 9.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. An efficient and energy-saving electrolytic copper foil dissolving tank system, characterized by: The invention comprises a spray-type copper dissolving tank (1) and a heat exchanger (9) connected to the copper dissolving tank (1); the bottom of the copper dissolving tank (1) is connected to a solution circulation pump (2); the primary side inlet of the heat exchanger (9) is connected to the outlet of the solution circulation pump (2); the secondary side inlet of the heat exchanger (9) is connected to a replenishing pump (5); the inlet of the replenishing pump (5) is connected to a dirty liquid tank (6); the lower end of the copper dissolving tank (1) is connected to an overflow pipe; one end of the overflow pipe is connected to the interior of the dirty liquid tank (6); the primary side outlet pipe of the heat exchanger (9) is connected to the overflow pipe on the copper dissolving tank (1); the secondary side outlet pipe of the heat exchanger (9) is connected to the upper end of the copper dissolving tank (1); and the outlet of the solution circulation pump (2) is also connected to the upper end of the copper dissolving tank (1).

2. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 1 is characterized in that: A second flow meter (8) and a second regulating valve (7) are arranged in sequence on the connecting pipeline between the two side inlets of the heat exchanger (9) and the liquid replenishment pump (5), and the second flow meter (8) is close to the heat exchanger (9). The second regulating valve (7) automatically adjusts the valve opening according to the set value and actual value of the second flow meter (8). A temperature sensor (10) is arranged on the pipeline connecting the two side outlets of the heat exchanger (9) and the copper dissolving tank (1).

3. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 2 is characterized in that: A first flow meter (3) and a first regulating valve (4) are provided on a pipeline connecting a side inlet of the heat exchanger (9) and the solution circulation pump (2), and the first flow meter (3) is close to the solution circulation pump (2).

4. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 3 is characterized in that: The first flow meter (3) dynamically tracks the second flow meter (8), and the second regulating valve (7) automatically adjusts the valve opening according to the actual value of the first flow meter (3).

5. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 4 is characterized in that: The lower end of the copper dissolving tank (1) is respectively provided with a flange opening g (16), a flange opening e (15), a flange opening c (19) and a flange opening f (18); the flange opening g (16) and the flange opening e (15) are located on the same side of the copper dissolving tank (1), and the diameter of the flange opening e (15) is greater than the diameter of the flange opening g (16).

6. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 5, characterized in that: One end of the solution circulation pump (2) is provided with a first flange port corresponding to the flange port g (16), the first flange port and the flange port g (16) are connected by bolts, and a sealing ring is provided between the first flange port and the flange port g (16).

7. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 6, characterized in that: The inner top of the copper dissolving tank (1) is provided with a plurality of annular spray pipes (12) containing a plurality of spray holes, the plurality of annular spray pipes (12) are distributed equidistantly up and down, and the plurality of annular spray pipes (12) are connected to the liquid outlet of the solution circulation pump (2).

8. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 7, characterized in that: A vertical main spray pipe (11) having a plurality of spray holes is arranged inside the copper dissolving tank (1), a reinforcing rib plate (13) is welded to the vertical main spray pipe (11), the upper end of the reinforcing rib plate (13) is welded to the top of the copper dissolving tank (1), the lower end of the reinforcing rib plate (13) is connected to the bottom of the copper dissolving tank (1) via a support frame (14), and the upper end of the vertical main spray pipe (11) is connected to a connecting pipe b1 for connecting to the outlet of a solution circulation pump (2).

9. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 8, characterized in that: The lower end of the copper dissolving tank (1) is provided with an overflow port d (17) for communicating with an overflow pipe. The high-concentration solution in the copper dissolving tank (1) overflows into the low-position waste liquid tank (6). The low-concentration solution in the waste liquid tank (6) is pumped into the heat exchanger (9) through the replenishment pump (5) and enters the copper dissolving tank (1) after heat exchange in the heat exchanger (9).

10. The high-efficiency and energy-saving electrolytic copper foil dissolving tank system according to claim 9, characterized in that: A liquid baffle is provided at the inlet of the solution circulation pump (2), a filter screen is provided on the liquid baffle, and a through hole for installing the filter screen is provided on the liquid baffle.

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