Copper foil factory copper sulfate waste heat recovery device and control system

Abstract

The invention relates to a copper foil factory copper sulfate waste heat recovery device and control system, and the recovery device comprises a first heat exchange device which is provided with a first liquid supply interface end, a first heat exchange outlet end and a first liquid return outlet end, and the first liquid supply interface end is communicated with a copper sulfate solution supply pipeline; the second heat exchange device is provided with a second liquid supply connector end and a second liquid return outlet end, the second liquid supply connector end is communicated with the first liquid return outlet end, and the second liquid return outlet end is communicated with a copper sulfate solution return pipeline; and the first heat pump system is communicated with the first heat exchange outlet end. The waste heat recovery device not only can recycle waste heat, but also can reduce energy consumption of cooling, and fully realizes energy conservation and environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of heating systems, and in particular to a copper sulfate waste heat recovery device and a control system for a copper foil factory. Background Art

[0002] Copper foil factories use a lot of copper sulfate in the production process, especially in the electrolysis process, which will generate a certain amount of waste heat due to the characteristics of chemical reaction and heat generation. If this heat is not utilized, it will be directly discharged into the environment through cooling towers or cooling water, causing energy waste and thermal pollution.

[0003] In order to avoid the above situation, the current utilization scheme is to cool down the copper sulfate solution through multiple industrial circulating water systems, each of which consists of 2 sets of cooling towers and 3 circulating water pumps. The excess heat generated in the production of copper foil can be supplied to the heat pump system through this industrial circulating water system and used as a free heat source. In this heat utilization method, the copper sulfate solution needs to be cooled after being simply heat recovered. This operation requires high energy consumption and cannot fully meet the requirements of energy saving and environmental protection. Summary of the invention

[0004] Based on this, it is necessary to provide a copper foil factory copper sulfate waste heat recovery device and control system that can not only recycle waste heat for reuse, but also reduce the energy consumption of cooling, and fully realize energy conservation and environmental protection, in order to address the problem of high energy consumption of cooling treatment after heat recovery.

[0005] A copper sulfate waste heat recovery device for a copper foil factory, comprising: A first heat exchange device, comprising a first liquid supply interface, a first heat exchange outlet and a first liquid return outlet, wherein the first liquid supply interface is connected to a copper sulfate solution supply pipeline; A second heat exchange device has a second liquid supply interface and a second liquid return outlet, wherein the second liquid supply interface is connected to the first liquid return outlet, and the second liquid return outlet is connected to a copper sulfate solution liquid return pipeline; and The first heat pump system is connected to the first heat exchange outlet.

[0006] The copper sulfate waste heat recovery device of the copper foil factory is provided with a first heat exchange device and a second heat exchange device connected in series. The copper sulfate solution enters the first heat exchange device for heat exchange treatment. After the solution reaches the required temperature, it enters the first heat pump system for use. The first heat pump system can use the heat energy for temperature regulation of some indoor thermostatic controls. The remaining copper sulfate solution after heat recovery will enter the second heat exchange device for heat exchange treatment. The remaining copper sulfate solution will be effectively cooled and recovered through the copper sulfate solution return line. This heat recovery method can not only recycle waste heat for reuse, but also reduce the energy consumption of cooling and cooling, fully realizing energy conservation and environmental protection.

[0007] In one of the embodiments, a second heat pump system is further included, and the first heat exchange device further includes a second heat exchange outlet end, and the second heat exchange outlet end is connected to the second heat pump system.

[0008] In one of the embodiments, the first heat pump system is in communication with the second heat pump system.

[0009] In one of the embodiments, it further includes a first water pump, wherein a water inlet of the first water pump is connected to the first heat exchange outlet, and a water outlet of the first water pump is connected to the first heat pump system.

[0010] In one of the embodiments, it further includes a first on-off valve, which is arranged on a connecting pipeline between a water outlet of the first water pump and the first heat pump system.

[0011] In one embodiment, it further includes a regulating pipeline and a second water pump, wherein the regulating pipeline connects the first heat pump system and the second heat pump system, the water inlet of the second water pump is connected to the external water pipe system, and the water outlet of the second water pump is connected to the regulating pipeline.

[0012] In one embodiment, it also includes a second on-off valve and a branch pipeline, the branch pipeline connects the water outlet of the second water pump with the regulating pipeline, and the branch pipeline is connected with the second heat exchange outlet, and the second on-off valve is arranged at the connection between the branch pipeline and the second heat exchange outlet.

[0013] In one embodiment, it also includes a regulating system, which is arranged between the first liquid supply interface and the copper sulfate solution supply pipeline, between the first liquid return outlet and the second liquid supply interface, between the first heat exchange outlet and the first heat pump system, and between the second heat exchange outlet and the second heat pump system. The regulating system includes a temperature detection device and a flow regulating device.

[0014] In one embodiment, it also includes a cooling tower group and a third water pump, and the second heat exchange device also includes a third heat exchange outlet and a heat exchange inlet, the third heat exchange outlet is connected to the inlet of the cooling tower group, the outlet of the cooling tower group is connected to the water inlet of the third water pump, and the water outlet of the third water pump is connected to the heat exchange inlet.

[0015] The present invention also discloses a copper sulfate waste heat recovery control system for a copper foil factory, comprising an energy efficiency control unit, a frequency conversion control unit, a detection sensor unit and the copper sulfate waste heat recovery device for the copper foil factory as described above, wherein the frequency conversion control unit can at least control the operating frequency of the first heat pump system; the detection sensor unit is used to detect the temperature and flow of each connecting link of the copper sulfate waste heat recovery device for the copper foil factory; the energy efficiency control unit can adjust the frequency conversion control unit according to the detection data of the detection sensor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a waste heat recovery device of the present invention; Figure 2 It is a control flow chart of the control system of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 100. Copper sulfate waste heat recovery device of copper foil factory; 1. first heat exchange device; 11. first liquid supply interface; 12. first heat exchange outlet; 13. first return liquid outlet; 14. second heat exchange outlet; 2. second heat exchange device; 21. second liquid supply interface; 22. second return liquid outlet; 23. third heat exchange outlet; 24. heat exchange inlet; 3. first heat pump system; 4. copper sulfate solution supply pipeline; 5. copper sulfate solution return pipeline; 6. second heat pump system; 71. first water pump; 72. second water pump; 73. regulating pipeline; 81. first check valve; 82. second check valve; 83. branch pipeline; 91. cooling tower group; 92. third water pump. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the specific details described below are only part of the embodiments of the present invention, and the present invention can also be implemented in many other embodiments different from those described herein. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0021] See also Figure 1 In one embodiment, a copper foil factory copper sulfate waste heat recovery device 100 includes: a first heat exchange device 1, a second heat exchange device 2 and a first heat pump system 3. The first heat exchange device 1 has a first liquid supply interface 11, a first heat exchange outlet 12 and a first liquid return outlet 13, and the first liquid supply interface 11 is connected to the copper sulfate solution liquid supply pipeline 4. The second heat exchange device 2 has a second liquid supply interface 21 and a second liquid return outlet 22, the second liquid supply interface 21 is connected to the first liquid return outlet 13, and the second liquid return outlet 22 is connected to the copper sulfate solution liquid return pipeline 5. The first heat pump system 3 is connected to the first heat exchange outlet 12.

[0022] The copper foil factory copper sulfate waste heat recovery device 100 is provided with a first heat exchange device 1 and a second heat exchange device 2 connected in series. The copper sulfate solution enters the first heat exchange device 1 for heat exchange treatment. After the solution reaches the required temperature, it enters the first heat pump system 3 for use. The first heat pump system 3 can use the heat energy for temperature regulation of some indoor thermostatic controls. The remaining copper sulfate solution after heat recovery will enter the second heat exchange device 2 for heat exchange treatment. The remaining copper sulfate solution will be effectively cooled and recovered through the copper sulfate solution return line 5. This heat recovery method can not only recycle waste heat for reuse, but also reduce the energy consumption of cooling and cooling, fully realizing energy conservation and environmental protection, and meeting the production process requirements.

[0023] In another embodiment, the copper foil factory copper sulfate waste heat recovery device 100 further includes a second heat pump system 6 connected to the first heat pump system 3, and the first heat exchange device 1 further includes a second heat exchange outlet 14, and the second heat exchange outlet 14 is connected to the second heat pump system 6. According to the heat supply demand, the heat exchange treatment solution entering the first heat pump system 3 and the second heat pump system 6 can be selectively adjusted to achieve optimal energy scheduling.

[0024] The copper foil factory copper sulfate waste heat recovery device 100 also includes a first water pump 71, a second water pump 72 and a regulating pipeline 73. The water inlet end of the first water pump 71 is connected to the first heat exchange outlet end 12, and the water outlet end of the first water pump 71 is connected to the first heat pump system 3. The regulating pipeline 73 is used to connect the first heat pump system 3 and the second heat pump system 6. The water inlet end of the second water pump 72 is connected to the external water pipe system, and the water outlet end of the second water pump 72 is connected to the regulating pipeline 73. A two-way heat recovery system can be formed, which can be switched according to the heating needs.

[0025] In order to ensure that the flow rate of heat recovery is more accurate, the copper foil factory copper sulfate waste heat recovery device 100 also includes a first stop valve 81, a second stop valve 82 and a branch line 83. The first stop valve 81 is provided on the connecting pipeline between the water outlet of the first water pump 71 and the first heat pump system 3, and is used to control and adjust the heat recovery flow rate provided to the first heat pump system 3. The branch line 83 is used to connect the water outlet of the second water pump 72 with the regulating pipeline 73, and the branch line 83 is connected to the second heat exchange outlet 14. The second stop valve 82 is provided at the connection between the branch line 83 and the second heat exchange outlet 14, and is used to control and adjust the heat recovery flow rate provided to the second heat pump system 6.

[0026] In other embodiments, the copper foil factory copper sulfate waste heat recovery device 100 also includes a cooling tower group 91 and a third water pump 92. The second heat exchange device 2 also includes a third heat exchange outlet 23 and a heat exchange inlet 24, the third heat exchange outlet 23 is connected to the inlet of the cooling tower group 91, the outlet of the cooling tower group 91 is connected to the water inlet of the third water pump 92, and the outlet of the third water pump 92 is connected to the heat exchange inlet 24. The copper sulfate solution after the second heat exchange device 2 and the cooling tower group 91 is cooled and recovered through the copper sulfate solution return line 5. Considering that maintenance and failure may occur in the later stage, the coordinated setting of the heat pump system and the cooling tower group 91 can meet the switching to the original mode of heat recovery through the heat pump and cooling tower to ensure the stability of the system.

[0027] See also Figure 2 The present invention also discloses a copper foil factory copper sulfate waste heat recovery control system, the control system includes an energy efficiency control unit, a frequency conversion control unit, a detection sensor unit, a flow control valve group and the copper foil factory copper sulfate waste heat recovery device 100 as described above. The frequency conversion control unit includes a water pump frequency converter and a cooling frequency converter, the water pump frequency converter is used to adjust the working frequency of the first water pump 71, the second water pump 72 and the third water pump 92, and the cooling frequency converter is used to adjust the working frequency of the cooling tower group 91. The detection sensor unit includes a temperature detection sensor, a flow detection sensor and a pressure sensor, and the detection sensor unit is arranged between the first liquid supply interface end 11 and the copper sulfate solution supply pipeline 4, between the first return liquid outlet end 13 and the second liquid supply interface end 21, between the first heat exchange outlet end 12 and the first heat pump system 3, and between the second heat exchange outlet end 14 and the second heat pump system 6. The energy efficiency control unit can adjust the working parameters of the water pump frequency converter, the cooling frequency converter and the flow control valve group according to the data detected by the detection sensor unit and in combination with the specific needs of heat recovery energy.

[0028] It is understandable that the energy efficiency control unit is responsible for monitoring the overall energy efficiency status of the system and adjusting the operating mode of each device according to actual needs. The energy efficiency control unit is connected to the frequency conversion control unit, the detection sensor unit and the flow control valve group by wireless communication to form an intelligent control system. Wireless communication protocols include: Wi-Fi, which is suitable for scenarios requiring higher data transmission speed and range; Zigbee, which is suitable for low power consumption and short-distance transmission, and is suitable for communication between devices in the control system. The frequency conversion control unit is used to adjust the operating speed of the water pump and the cooling tower, and control power consumption and system load by adjusting the frequency. The energy efficiency control unit adjusts the operating speed of the water pump and the cooling tower according to the real-time load demand to achieve optimal energy efficiency. The flow control valve group controls the flow and pressure of the fluid, and the energy efficiency control unit adjusts the valve switch state according to the changes in the system load to achieve energy saving effects.

[0029] Data collection: Real-time monitoring of the working status of water pump inverters, cooling tower inverters and valves through wireless communication, including power consumption, flow, temperature, pressure and other parameters.

[0030] Data analysis and optimization: The energy efficiency control unit uses optimization algorithms to adjust the operating mode of the equipment and optimize energy efficiency based on real-time data analysis.

[0031] Control strategy: According to the system requirements, the energy efficiency control unit needs to have an intelligent control strategy. For example, it can automatically adjust the working status of the water pump and cooling tower according to the indoor temperature or cooling load, or adjust the valve switch according to the changes in flow and pressure.

[0032] In one embodiment, the first heat exchange device 1 and the second heat exchange device 2 may be plate heat exchangers.

[0033] Regarding the verification of recovered heat, considering the heat loss of the plate heat exchanger, it is more accurate to consider the heat exchange from the cooling water side. The flow rate of a single heat exchanger circulation pump is 350m³ / h, the frequency is 30Hz, and the flow rate after frequency conversion is 210m³ / h. In winter, the average supply water temperature of cooling water is 34℃, the return water temperature is 25℃, and the circulating heat dissipation is 2205KW, which exceeds the rated heat of the heat pump and meets the reheating requirements.

[0034] Regarding the reheat temperature requirement, the air temperature of the constant temperature and humidity wind cabinet after dehumidification in summer is relatively low, with the lowest being around 12°C. The reheat temperature only needs to be ≥30°C to meet the reheat requirement of the constant temperature and humidity wind cabinet. In winter, the constant temperature and humidity wind cabinet can be maintained above 45°C to meet the heating demand, and the supply temperature of the copper sulfate solution is above 57°C, which fully meets the requirement of above 45°C after heat exchange by the plate heat exchanger.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations, substitutions and improvements can be made without departing from the concept of the present invention, and these should all be included in the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the claims.

Claims

1. A copper sulfate waste heat recovery device for a copper foil factory, characterized in that: include: A first heat exchange device, comprising a first liquid supply interface, a first heat exchange outlet and a first liquid return outlet, wherein the first liquid supply interface is connected to a copper sulfate solution supply pipeline; A second heat exchange device has a second liquid supply interface and a second liquid return outlet, wherein the second liquid supply interface is connected to the first liquid return outlet, and the second liquid return outlet is connected to a copper sulfate solution liquid return pipeline; and The first heat pump system is connected to the first heat exchange outlet.

2. The copper foil factory copper sulfate waste heat recovery device according to claim 1, characterized in that: It also includes a second heat pump system, and the first heat exchange device also includes a second heat exchange outlet end, and the second heat exchange outlet end is connected to the second heat pump system.

3. The copper foil factory copper sulfate waste heat recovery device according to claim 2, characterized in that: The first heat pump system is in communication with the second heat pump system.

4. The copper foil factory copper sulfate waste heat recovery device according to claim 2, characterized in that: It also includes a first water pump, wherein a water inlet end of the first water pump is connected to the first heat exchange outlet end, and a water outlet end of the first water pump is connected to the first heat pump system.

5. The copper foil factory copper sulfate waste heat recovery device according to claim 4, characterized in that: It also includes a first on-off valve, which is arranged on a connecting pipeline between the water outlet of the first water pump and the first heat pump system.

6. The copper foil factory copper sulfate waste heat recovery device according to claim 2, characterized in that: It also includes a regulating pipeline and a second water pump. The regulating pipeline connects the first heat pump system and the second heat pump system. The water inlet of the second water pump is connected to the external water pipe system, and the water outlet of the second water pump is connected to the regulating pipeline.

7. The copper sulfate waste heat recovery device for a copper foil factory according to claim 6, characterized in that: It also includes a second on-off valve and a branch pipeline, wherein the branch pipeline connects the water outlet of the second water pump with the regulating pipeline, and the branch pipeline connects with the second heat exchange outlet, and the second on-off valve is arranged at the connection between the branch pipeline and the second heat exchange outlet.

8. The copper foil factory copper sulfate waste heat recovery device according to claim 2, characterized in that: It also includes a regulating system, which is arranged between the first liquid supply interface and the copper sulfate solution supply pipeline, between the first liquid return outlet and the second liquid supply interface, between the first heat exchange outlet and the first heat pump system, and between the second heat exchange outlet and the second heat pump system. The regulating system includes a temperature detection device and a flow regulating device.

9. The copper foil factory copper sulfate waste heat recovery device according to claim 8, characterized in that: It also includes a cooling tower group and a third water pump, and the second heat exchange device also includes a third heat exchange outlet and a heat exchange inlet, the third heat exchange outlet is connected to the inlet of the cooling tower group, the outlet of the cooling tower group is connected to the water inlet of the third water pump, and the water outlet of the third water pump is connected to the heat exchange inlet.

10. A copper foil factory copper sulfate waste heat recovery control system, characterized in that: It comprises an energy efficiency control unit, a frequency conversion control unit, a detection sensor unit and a copper foil factory copper sulfate waste heat recovery device as described in any one of claims 1 to 9, wherein the frequency conversion control unit can at least control the operating frequency of the first heat pump system; the detection sensor unit is used to detect the temperature and flow rate of each connected link of the copper foil factory copper sulfate waste heat recovery device; The energy efficiency control unit can adjust the frequency conversion control unit according to the detection data of the detection sensor unit.

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