An immersion copper dissolving tank high efficiency energy-saving system and heating method

Abstract

The invention discloses an immersion copper dissolving tank high-efficiency energy-saving system and heating method, comprising a copper dissolving tank and a low-level tank located lower than the copper dissolving tank, a steam bag with an external steam source is arranged inside the copper dissolving tank, the copper dissolving tank is connected with the low-level tank through a first pipeline, the copper dissolving tank is also connected with an external blower through an eighth pipeline, the low-temperature inlet of the heat exchanger is connected with the low-level tank through a second pipeline, the low-temperature outlet of the heat exchanger is connected with the copper replenishing liquid inlet of the copper dissolving tank through a third pipeline; the first liquid outlet of the liquid storage tank is connected with the high-temperature inlet of the heat exchanger through a fourth pipeline, the first liquid inlet of the liquid storage tank is connected with the high-temperature outlet of the heat exchanger through a fifth pipeline; the heat source inlet and the heat source outlet of the water source heat pump are respectively connected to the workshop cooling water return and the cooling tower. The invention can solve the problems of large solution heating steam consumption and high cost in the existing immersion copper dissolving tank.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic copper foil liquid production, in particular to an immersion type copper dissolving tank high efficiency energy-saving system and a heating method. Background Art

[0002] In the production process of electrolytic copper foil, copper dissolving is the first step. The copper raw materials that meet the requirements are put into the tank, and a chemical reaction occurs under the action of oxygen and concentrated sulfuric acid to generate electrolytic copper sulfate solution. According to the process type, copper dissolving can be divided into immersion type and spray type.

[0003] The immersion type is that the copper raw material is immersed in the electrolyte in the tank. Under the conditions of external blast oxygen supply and steam heating, the copper raw material in the tank continuously undergoes a chemical reaction of copper raw material dissolution to ensure the stability of the copper ion concentration of the solution in the tank. At the same time, the high-concentration solution in the tank overflows to the low-level tank, and the low-level tank replenishes the solution to the copper dissolving tank through the copper replenishment pump to ensure the stability of the solution volume of the copper dissolving tank and the low-level tank, thereby ensuring the stability of the copper ion concentration and liquid level of the entire copper dissolving system.

[0004] During the copper dissolving process, steam needs to be delivered to the copper dissolving tank regularly to ensure the temperature and copper dissolving rate in the copper dissolving tank. Since the steam pipeline is relatively long and the heat exchange efficiency of the steam drum in the copper dissolving tank is low, this method consumes a lot of steam and is costly. Summary of the invention

[0005] The invention provides an efficient energy-saving system and a heating method for an immersion copper dissolving tank, which can solve the problems of large steam consumption and high cost for heating a solution in an existing immersion copper dissolving tank.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present invention provides the following technical solutions: an immersion copper dissolving tank high-efficiency energy-saving system, comprising a copper dissolving tank and a low-level tank located lower than the copper dissolving tank, wherein a steam bag connected to an external steam source is arranged inside the copper dissolving tank, the copper dissolving tank and the low-level tank are connected through a first pipeline, and the copper dissolving tank is also connected to an external blower through an eighth pipeline, and further comprising:

[0007] A heat exchanger, wherein the low-temperature inlet of the heat exchanger is connected to the low-level tank through a second pipeline, and the low-temperature outlet of the heat exchanger is connected to the copper replenishing liquid inlet of the copper dissolving tank through a third pipeline;

[0008] A liquid storage tank, wherein the first liquid outlet of the liquid storage tank is connected to the high-temperature inlet of the heat exchanger through a fourth pipeline, and the first liquid inlet of the liquid storage tank is connected to the high-temperature outlet of the heat exchanger through a fifth pipeline;

[0009] A water source heat pump, wherein the heat source liquid inlet and the heat source liquid outlet of the water source heat pump are respectively connected to the workshop cooling water return and the cooling tower, the condenser outlet of the water source heat pump is connected to the second liquid inlet of the liquid storage tank through the sixth pipeline, and the condenser inlet of the water source heat pump is connected to the second liquid outlet of the liquid storage tank through the seventh pipeline;

[0010] The first pipeline and the third pipeline are connected via a pipeline installed with a first regulating valve;

[0011] By setting up a water source heat pump, the waste heat of the workshop cooling water return water can be used to heat the water in the liquid storage tank and maintain the water at a certain temperature. By setting up a heat exchanger, the temperature of the hot water in the liquid storage tank is used to heat the solution in the heat exchanger, so that the solution entering the copper dissolving tank is maintained at a certain temperature, reducing the steam consumption of the steam bag in the copper dissolving tank and reducing the cost of steam use.

[0012] Furthermore, a second regulating valve is installed on the third pipeline. By setting the second regulating valve, the amount of high-temperature solution entering the copper dissolving tank can be adjusted, so as to facilitate the adjustment of the heat balance in the copper dissolving tank.

[0013] Furthermore, a third regulating valve is installed on the eighth pipeline, which can adjust the air volume output by the blower entering the copper dissolving tank, thereby facilitating the adjustment of the heat balance in the copper dissolving tank.

[0014] Furthermore, the copper dissolving tank is also externally connected to an acid mist exhaust pipeline, and a fourth regulating valve is installed on the acid mist exhaust pipeline to control the amount of acid mist exhaust, thereby conveniently controlling the heat consumption in the copper dissolving tank.

[0015] Furthermore, a fifth regulating valve is installed on the fifth pipeline, which can control the amount of high-temperature hot water refluxed from the heat exchanger to the liquid storage tank, thereby adjusting the heat exchange efficiency in the heat exchanger and maintaining the thermal balance of the copper melting tank.

[0016] Furthermore, the second pipeline, the fourth pipeline and the seventh pipeline are respectively installed with a first circulation pump, a second circulation pump and a third circulation pump, which can realize continuous thermal circulation of the solution and the high-temperature hot water.

[0017] In a second aspect, the present invention further provides a heating method for the high-efficiency energy-saving system of the immersion copper dissolving tank according to the first aspect, which specifically includes the following steps: returning high-temperature cooling water from the workshop to the water source heat pump, and discharging the water from the heat source outlet back to the cooling tower after evaporation and heat absorption, so that high-temperature hot water is generated in the water source heat pump, and the high-temperature hot water enters the liquid storage tank along the sixth pipeline, and at the same time, the third circulation pump absorbs hot water from the liquid storage tank and returns to the water source heat pump along the seventh pipeline, so that the water tank temperature is heated to the target set value by circulating heating;

[0018] At the same time, the high-temperature hot water in the liquid storage tank enters the heat exchanger along the second circulation pump and the fourth pipeline, and exchanges heat with the solution that enters the heat exchanger from the low-level tank along the second pipeline, thereby increasing the temperature of the solution. The solution with increased temperature enters the copper replenishing solution inlet along the third pipeline. The high-temperature hot water after heat exchange in the heat exchanger returns to the liquid storage tank along the fifth pipeline. At the same time, the solution in the copper dissolving tank flows back to the low-level tank through the first pipeline.

[0019] Furthermore, in the case of shutdown, all the solution in the copper dissolving tank is discharged to the low-level tank, the first regulating valve is opened, and the second regulating valve is closed. After the copper replenishing liquid in the low-level tank is heated by the heat exchanger, it will no longer return to the copper dissolving tank, thereby realizing self-circulation of the solution in the low-level tank and ensuring the temperature of the low-level tank. In this way, the solution in the low-level tank can be kept warm without using steam.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The structure is simple. By setting a water source heat pump, the waste heat of the workshop cooling water return water can be used to heat the water in the liquid storage tank and maintain the water at a certain temperature. By setting a heat exchanger, the temperature of the hot water in the liquid storage tank is used to heat the solution in the heat exchanger, so that the solution entering the copper dissolving tank is kept at a certain temperature, the steam consumption of the steam bag in the copper dissolving tank is reduced, and the cost of using steam is reduced; at the same time, the temperature of the copper dissolving tank is made more stable and reliable by adjusting the high-temperature hot water flow, the acid mist exhaust flow and the blower air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a system block diagram according to the present invention.

[0023] Reference numerals:

[0024] 1. Low-temperature inlet, 11. Heat source liquid inlet, 12. Heat source liquid outlet, 13. Fifth pipeline, 14. Third pipeline, 15. First pipeline, 17. Copper replenishment liquid inlet, 18. Acid mist exhaust pipeline, 19. Eighth pipeline, 2. Low-temperature outlet, 21. Second pipeline, 22. Fourth pipeline, 23. Sixth pipeline, 24. Seventh pipeline, 3. High-temperature inlet, 4. High-temperature outlet, 5. First liquid outlet, 6. First liquid inlet, 7. Second liquid outlet, 8. Second liquid inlet, 9. Condenser outlet, 10. Condenser inlet, T1. Copper dissolving tank, T2. Low-level tank, T3. Liquid storage tank, E1. Heat exchanger, H1. Water source heat pump, P1. First circulation pump, P2. Second circulation pump, P3. Third circulation pump, V1. Fifth regulating valve, V2. Second regulating valve, V3. First regulating valve, V4. Fourth regulating valve, V5. Third regulating valve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] The present invention aims to solve the problem of large steam consumption and high cost in existing immersion copper dissolving tanks for heating solution. Figure 1 As shown, the following technical solution is provided: an immersion copper dissolving tank high-efficiency energy-saving system, comprising a copper dissolving tank T1 and a low-position tank T2 located lower than the copper dissolving tank T1, wherein a steam bag connected to an external steam source is arranged inside the copper dissolving tank T1, the copper dissolving tank T1 is connected to the low-position tank T2 through a first pipeline 15, and the copper dissolving tank T1 is also connected to an external blower through an eighth pipeline 19, and further comprising:

[0027] Heat exchanger E1, the low temperature inlet 1 of the heat exchanger E1 is connected to the low position tank T2 through the second pipeline 21, and the low temperature outlet 2 of the heat exchanger E1 is connected to the copper replenishing liquid inlet 17 of the copper dissolving tank T1 through the third pipeline 14;

[0028] Liquid storage tank T3, wherein the first liquid outlet 5 of the liquid storage tank T3 is connected to the high-temperature inlet 3 of the heat exchanger E1 through the fourth pipeline 22, and the first liquid inlet 6 of the liquid storage tank T3 is connected to the high-temperature outlet 4 of the heat exchanger E1 through the fifth pipeline 13;

[0029] Water source heat pump H1, the heat source liquid inlet 11 and the heat source liquid outlet 12 of the water source heat pump H1 are respectively connected to the workshop cooling water return and the cooling tower, the condenser outlet 9 of the water source heat pump H1 is connected to the second liquid inlet 8 of the liquid storage tank T3 through the sixth pipeline 23, and the condenser inlet 10 of the water source heat pump H1 is connected to the second liquid outlet 7 of the liquid storage tank T3 through the seventh pipeline 24;

[0030] The first pipeline 15 and the third pipeline 14 are connected via a pipeline equipped with a first regulating valve V3;

[0031] By setting up a water source heat pump H1, the waste heat of the workshop cooling water return water can be used to heat the water in the liquid storage tank T3 and maintain the water at a certain temperature. By setting up a heat exchanger E1, the temperature of the hot water in the liquid storage tank T3 is used to heat the solution in the heat exchanger E1, so that the solution entering the copper dissolving tank T1 is maintained at a certain temperature, reducing the steam consumption of the steam bag in the copper dissolving tank T1 and reducing the cost of steam use.

[0032] Specifically, the steam bag is located at the bottom of the copper dissolving tank T1, and external high-temperature steam is introduced into the steam bag, so that the steam bag forms a heating source to heat the solution in the copper dissolving tank T1. At the same time, the blower inputs wind into the steam bag through the eighth pipeline 19 to improve the flow of steam and the heating efficiency. The condensed water formed after the steam is cooled is discharged to the outside of the copper dissolving tank T1 for collection.

[0033] Even if no steam is introduced into the steam drum, the temperature can be maintained at a usable temperature by continuously adding a high temperature solution into the copper replenishing solution inlet 17, such as the temperature of the solution can be maintained between 75°C and 85°C.

[0034] Due to the use of water source heat pump H1, its working efficiency is high. Compared with the original steam heating method, the water source heat pump H1 high-temperature hot water heating method reduces the direct energy consumption cost by about 35%.

[0035] In addition, since the water source heat pump H1 fully utilizes the return heat of the process cooling water, the process heat temperature returning to the cooling tower directly drops by about 3℃-5℃, which reduces the load of the cooling tower and saves the power consumption of the cooling tower. The beneficial effects are listed as follows:

[0036] Table 1 Comparison of the effects of traditional steam heating and the high-efficiency heat pump in this embodiment

[0037]

[0038]

[0039] In this embodiment, a second regulating valve V2 may be installed on the third pipeline 14. By setting the second regulating valve V2, the amount of high-temperature solution entering the copper dissolving tank T1 can be adjusted, so as to facilitate the adjustment of the heat balance in the copper dissolving tank T1. A third regulating valve V5 is installed on the eighth pipeline 19, so as to adjust the air volume outputted by the blower entering the copper dissolving tank T1, so as to facilitate the adjustment of the heat balance in the copper dissolving tank T1. The copper dissolving tank T1 is also connected to an external acid mist exhaust pipeline 18, and a fourth regulating valve V4 is installed on the acid mist exhaust pipeline 18, so as to control the amount of acid mist exhaust, so as to facilitate the control of the heat consumption in the copper dissolving tank T1.

[0040] The temperature in the copper dissolving tank T1 can be controlled by adjusting the second regulating valve V2, the third regulating valve V5 and the fourth regulating valve V4 without using steam.

[0041] At the same time, if Figure 1 As shown, a fifth regulating valve V1 is installed on the fifth pipeline 13, which can control the amount of high-temperature hot water refluxed from the heat exchanger E1 to the liquid storage tank T3, thereby adjusting the heat exchange efficiency in the heat exchanger E1 and maintaining the thermal balance of the copper dissolving tank T1.

[0042] The second pipeline 21, the fourth pipeline 22 and the seventh pipeline 24 are respectively installed with a first circulation pump P1, a second circulation pump P2 and a third circulation pump P3, which can realize continuous heat circulation of the solution and the high-temperature hot water.

[0043] As a specific heating method in this embodiment, it specifically includes returning the high-temperature cooling water of the workshop to the water source heat pump H1, and after evaporation and heat absorption, it is discharged from the heat source outlet 12 and returned to the cooling tower, so that the water source heat pump H1 generates high-temperature hot water, and the high-temperature hot water enters the liquid storage tank T3 along the sixth pipeline 23. At the same time, the third circulation pump P3 absorbs hot water from the liquid storage tank T3 and returns to the water source heat pump H1 along the seventh pipeline 24. In this way, the water tank temperature is heated to the target setting value through circulation heating;

[0044] At the same time, the high-temperature hot water in the liquid storage tank T3 enters the heat exchanger E1 along the second circulation pump P2 and the fourth pipeline 22, and exchanges heat with the solution entering the heat exchanger E1 from the low-level tank T2 along the second pipeline 21, thereby increasing the temperature of the solution. The solution with increased temperature enters the copper replenishing solution inlet 17 along the third pipeline 14, and the high-temperature hot water after heat exchange in the heat exchanger E1 returns to the liquid storage tank T3 along the fifth pipeline 13. At the same time, the solution in the copper dissolving tank T1 flows back to the low-level tank T2 through the first pipeline 15.

[0045] In this embodiment, when the machine is shut down, all the solution in the copper dissolving tank T1 is discharged to the low-level tank T2, the first regulating valve V3 is opened, and the second regulating valve V2 is closed. After the copper replenishing liquid in the low-level tank T2 is heated by the heat exchanger E1, it no longer returns to the copper dissolving tank T1, so that the self-circulation of the solution in the low-level tank is realized, and the temperature of the low-level tank is guaranteed. In this way, the solution in the low-level tank T2 can be kept warm without using steam.

[0046] The immersion copper dissolving tank high-efficiency energy-saving system in this embodiment can be set up in 5-8 groups in the workshop for use. Without using steam heating, the temperature of the copper dissolving tank T1 can be maintained between 75°C and 85°C, and the average temperature is about 5°C higher than before. At the same time, when a single group of systems is shut down, the solution in the low-level tank can still ensure the solution temperature through the method of this patent.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, in the present invention, descriptions such as "primary", "secondary", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "primary" or "secondary" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An immersion copper dissolving tank high efficiency energy saving system, comprising: A copper dissolving tank (T1) and a low-position tank (T2) located lower than the copper dissolving tank (T1), wherein a steam bag connected to an external steam source is arranged inside the copper dissolving tank (T1), the copper dissolving tank (T1) and the low-position tank (T2) are connected via a first pipeline (15), and the copper dissolving tank (T1) is connected to an external blower via an eighth pipeline (19), characterized in that it also includes: A heat exchanger (E1), wherein a low-temperature inlet (1) of the heat exchanger (E1) is connected to a low-level tank (T2) via a second pipeline (21), and a low-temperature outlet (2) of the heat exchanger (E1) is connected to a copper replenishing solution inlet (17) of a copper dissolving tank (T1) via a third pipeline (14); A liquid storage tank (T3), wherein a first liquid outlet (5) of the liquid storage tank (T3) is connected to a high-temperature inlet (3) of a heat exchanger (E1) via a fourth pipeline (22), and a first liquid inlet (6) of the liquid storage tank (T3) is connected to a high-temperature outlet (4) of the heat exchanger (E1) via a fifth pipeline (13); A water source heat pump (H1), wherein the heat source liquid inlet (11) and the heat source liquid outlet (12) of the water source heat pump (H1) are respectively connected to the workshop cooling water return and the cooling tower, the condenser outlet (9) of the water source heat pump (H1) is connected to the second liquid inlet (8) of the liquid storage tank (T3) through a sixth pipeline (23), and the condenser inlet (10) of the water source heat pump (H1) is connected to the second liquid outlet (7) of the liquid storage tank (T3) through a seventh pipeline (24); The first pipeline (15) and the third pipeline (14) are connected via a pipeline equipped with a first regulating valve (V3).

2. The high-efficiency energy-saving system for immersion copper dissolving tank according to claim 1 is characterized in that: A second regulating valve (V2) is also installed on the third pipeline (14).

3. The high-efficiency energy-saving system for immersion copper dissolving tank according to claim 2 is characterized in that: The eighth pipeline (19) is provided with a third regulating valve (V5).

4. The high-efficiency energy-saving system for immersion copper dissolving tank according to claim 3 is characterized in that: The copper dissolving tank (T1) is also externally connected to an acid mist exhaust pipeline (18), and a fourth regulating valve (V4) is installed on the acid mist exhaust pipeline (18).

5. The high-efficiency energy-saving system for immersion copper dissolving tank according to claim 1 is characterized in that: A fifth regulating valve (V1) is installed on the fifth pipeline (13).

6. The high-efficiency energy-saving system for immersion copper dissolving tank according to claim 1 is characterized in that: The second pipeline (21), the fourth pipeline (22) and the seventh pipeline (24) are respectively installed with a first circulation pump (P1), a second circulation pump (P2) and a third circulation pump (P3).

7. A heating method for an immersion copper dissolving tank high-efficiency energy-saving system according to any one of claims 1 to 6, characterized in that: Specifically, the high-temperature cooling water return water of the workshop enters the water source heat pump (H1), and after evaporation and heat absorption, it is discharged from the heat source outlet (12) back to the cooling tower, so that high-temperature hot water is generated in the water source heat pump (H1), and the high-temperature hot water enters the liquid storage tank (T3) along the sixth pipeline (23). At the same time, the third circulation pump (P3) sucks hot water from the liquid storage tank (T3) and returns to the water source heat pump (H1) along the seventh pipeline (24), so that the circulation heating is carried out to heat the water tank temperature to the target setting value; At the same time, the high-temperature hot water in the liquid storage tank (T3) enters the heat exchanger (E1) along the second circulation pump (P2) and the fourth pipeline (22), performs heat exchange with the solution entering the heat exchanger (E1) from the low-level tank (T2) along the second pipeline (21), thereby increasing the temperature of the solution. The solution with the increased temperature enters the copper replenishing solution inlet (17) along the third pipeline (14), and the high-temperature hot water after heat exchange in the heat exchanger (E1) returns to the liquid storage tank (T3) along the fifth pipeline (13). At the same time, the solution in the copper dissolving tank (T1) flows back to the low-level tank (T2) through the first pipeline (15).

8. The heating method of the immersion copper dissolving tank high-efficiency energy-saving system according to claim 7 is characterized in that: When the machine is shut down, all the solution in the copper dissolving tank (T1) is discharged to the low-level tank (T2), the first regulating valve (V3) is opened, and the second regulating valve (V2) is closed. After the copper replenishing liquid in the low-level tank (T2) is heated by the heat exchanger (E1), it no longer returns to the copper dissolving tank (T1), thus realizing the self-circulation of the solution in the low-level tank and ensuring the temperature of the low-level tank.

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