Waste heat circulating collection, conversion and utilization system for large industrial electric oven

Abstract

The invention discloses a waste heat circulating, collecting, converting and utilizing system for a large industrial electric oven, relates to the technical field of waste heat utilization, and solves the problem that an existing waste heat circulating, collecting, converting and utilizing system is low in waste heat recycling rate. Comprising a water storage tank used for containing liquid to be heated, and further comprises a heat collection device arranged above a waste gas exhaust pipeline of the electric oven to collect heat in waste gas; the heat exchange unit is respectively connected with the heat collection device and the water storage tank and is used for carrying out stepped heat exchange on the collected waste gas so as to transfer heat in the waste gas to liquid in the water storage tank in stages; high-temperature waste gas is collected through the heat collecting device, stepped heat exchange is conducted on the waste gas through the heat exchange unit, multi-stage recycling of waste gas heat is achieved, the waste heat utilization efficiency is improved, and energy waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of waste heat utilization technology, and in particular to a waste heat recycling, collection, conversion and utilization system for large industrial electric ovens. Background Technology

[0002] Large industrial furnaces generate large amounts of high-temperature waste gas during operation, which contains a significant amount of thermal energy. Currently, in conventional designs, most of this waste gas is directly released into the environment. This practice not only wastes a large amount of thermal energy but also exacerbates thermal pollution.

[0003] Currently, although some waste heat recovery devices exist in existing technologies, most of them adopt a single-stage heat exchange method, that is, they only use one heat exchanger to transfer some of the heat in the waste gas to water or other media. However, this single-stage heat exchange method has significant drawbacks: after one heat exchange, the temperature of the waste gas is still relatively high, and the waste heat is directly discharged without being fully recovered and utilized, resulting in low waste heat utilization rate.

[0004] In summary, existing technologies suffer from low waste heat recovery and utilization rates. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of low waste heat recovery and utilization rate in traditional waste heat recycling and conversion systems, and to propose a waste heat recycling and conversion system for large industrial electric ovens.

[0006] To achieve the above objectives, the present invention employs the following technology: a waste heat recycling, collection, conversion, and utilization system for a large industrial electric oven, comprising a water storage tank for containing the liquid to be heated: It also includes: a heat collection device, installed above the exhaust pipe of the electric oven, to collect heat from the exhaust gas; The heat exchange unit is connected to the heat collection device and the water storage tank respectively, and is used to perform cascade heat exchange on the collected waste gas so as to transfer the heat in the waste gas to the liquid in the water storage tank in stages.

[0007] As a waste heat recycling and conversion system for a large industrial electric oven, as described above, the heat collection device includes a waste heat collection hood and a negative pressure fan. The waste heat collection hood is installed above the exhaust gas outlet. The negative pressure fan is fixed inside the waste heat collection hood and is used to generate negative pressure to draw in waste gas.

[0008] As a waste heat recycling, collection, conversion, and utilization system for a large industrial electric oven, the heat exchange unit includes: A heat preservation box is fixed to the side of the water storage tank, and an airflow channel is formed inside it; A heat exchanger, installed inside the waste heat collection hood, is used to perform the first heat exchange with the collected waste gas to heat the circulating water; And an exhaust gas pipe, connected between the waste heat collection hood and the heat preservation box, and connected to the airflow channel, for guiding the exhaust gas after the first heat exchange into the airflow channel.

[0009] As a waste heat recycling and conversion system for a large industrial electric oven as described above, the water storage tank includes at least one heat-using tank. The exhaust gas pipeline includes a spiral tube segment disposed in each of the heat-using tanks. The spiral tube segment is connected to the airflow channel to allow the exhaust gas to undergo a second heat exchange with the liquid in the heat-using tank when it flows through the spiral tube segment.

[0010] As a waste heat recycling, collection, conversion and utilization system for a large industrial electric oven, the system further includes a heat distribution module, which includes multiple regulating valves. Each regulating valve is correspondingly set at the inlet of one of the spiral tube sections, and is used to independently control the inflow of waste gas into each spiral tube section.

[0011] As a waste heat recycling and conversion system for a large industrial electric oven, the system further includes a monitoring module, which includes multiple temperature sensing switches. Each temperature sensing switch corresponds to a heating tank and is used to detect the real-time temperature of the liquid in the heating tank. The monitoring module is electrically connected to the heat distribution module, and the monitoring module is used to control the opening degree of the regulating valve according to the real-time temperature.

[0012] As an example of the above-mentioned industrial large-scale electric oven waste heat recycling, collection, conversion and utilization system, the system also includes a water circulation component connected between the heat exchange unit and the water storage tank, which is used to drive the liquid in the water storage tank to circulate between the heat exchange unit and the water storage tank.

[0013] As a waste heat recycling and conversion system for a large industrial electric oven as described above, the water circulation component includes an installation plate fixed to the side of the heat preservation box, a circulation pump fixed to the installation plate, an inlet pipe connecting the water storage tank and the input end of the circulation pump, and a water injection pipe connecting the output end of the circulation pump and the inlet end of the heat exchanger. And a return water pipeline connecting the outlet end of the heat exchanger and the water storage tank, the water injection pipeline and the return water pipeline converge in the exhaust gas pipeline, and the water inlet pipeline is inserted in the heat preservation box.

[0014] As a waste heat recycling and conversion system for a large industrial electric oven as described above, the water storage tank also includes a cover plate, which is closable and installed at the opening of the heat-using tank to reduce heat loss.

[0015] As a waste heat recycling and conversion system for a large industrial electric oven as described above, the bottom surface of the cover plate is provided with a first magnetic strip, and the opening of the heat-using tank is provided with a second magnetic strip that cooperates with the first magnetic strip for adsorption.

[0016] In summary, due to the adoption of the above-mentioned technology in the waste heat recycling, collection, conversion, and utilization system for large-scale industrial electric ovens, the beneficial effects of this invention are: (1) The present invention uses a heat exchange unit to perform cascade heat exchange on the collected waste gas. Specifically, the heat exchanger performs a first heat exchange with the waste gas inside the waste heat collection hood to heat the circulating water, and then the heated circulating water is transported to the water storage tank. This achieves priority recovery of heat from the high-temperature section of the waste gas and ensures high heat exchange efficiency. Then, by setting a spiral tube section in each heat-using tank, the waste gas after the first heat exchange undergoes a second heat exchange with the liquid in the tank when it flows through the spiral tube section. This achieves deep extraction of waste heat from the waste gas, further improves the heat recovery rate, and significantly improves the comprehensive utilization rate of waste heat.

[0017] (3) The solution of the present invention, by setting a heat distribution module, which includes multiple regulating valves correspondingly set at the inlet of each spiral pipe section, can realize independent control of the waste gas flow rate entering each heat-using tank, and can flexibly distribute heat according to the actual heat demand of different tanks, thus avoiding heat waste.

[0018] (4) The solution of the present invention, by setting a monitoring module, includes multiple temperature sensing switches corresponding to each heat tank, and the monitoring module is electrically connected to the heat distribution module, realizes automatic control of the valve opening according to the real-time temperature of the liquid in each heat tank, so that the system has intelligent constant temperature control capability and improves the accuracy and stability of heat distribution. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure according to the present invention is shown; Figure 2 A schematic diagram of the heat collection device and its internal structure according to the present invention is shown. Figure 3 A schematic diagram of the structure of the water storage tank and several cover plates according to the present invention during an explosion is shown. Figure 4 This diagram shows a top view of the internal cross-section of the water storage tank and the heat preservation box according to the present invention. Figure 5 A connection block diagram illustrating the control principle according to the present invention is shown.

[0020] Legend: 1. Heat collection device; 11. Waste heat collection hood; 12. Waste gas pipeline; 121. Spiral pipe section; 13. Frame; 14. Negative pressure fan; 2. Water storage tank; 21. Heat-using tank; 22. Cover plate; 23. First magnetic strip; 24. Second magnetic strip; 3. Heat exchange unit; 31. Heat preservation box; 32. Heat exchanger; 33. Airflow channel; 4. Water circulation assembly; 41. Mounting plate; 42. Circulation pump; 43. Water injection pipeline; 44. Water return pipeline; 45. Water inlet pipeline; 5. Heat distribution module; 51. Regulating valve; 6. Monitoring module. Detailed Implementation

[0021] The following will describe, with reference to the accompanying drawings of the embodiments of the present invention, a waste heat recycling, collection, conversion, and utilization system for a large industrial electric oven according to the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-5 As shown, a waste heat recycling and conversion system for a large industrial electric oven includes a water storage tank 2, a heat collection device 1, a heat exchange unit 3, a water circulation assembly 4, a heat distribution module 5, and a monitoring module 6. Example 1

[0023] This embodiment provides a basic waste heat recycling, collection, conversion, and utilization system for electric ovens.

[0024] Specifically, the water storage tank 2 is used to hold the liquid to be heated, and the heat collection device 1 is set above the exhaust gas discharge pipe of the electric oven, including a waste heat collection hood 11 and a negative pressure fan 14. It should be noted that the waste heat collection hood 11 is trumpet-shaped or hood-shaped, with its large end facing the exhaust gas discharge port, and is used to cover the exhaust gas discharge port. The port of the waste heat collection hood 11 is fixed with a frame 13, and the negative pressure fan 14 is fixed inside the frame 13, located in the center of the waste heat collection hood 11, and is used to generate negative pressure to actively draw in the exhaust gas and prevent the exhaust gas from overflowing. Heat exchange unit 3 includes a heat insulation box 31, a heat exchanger 32, and an exhaust gas pipe 12. The heat insulation box 31 is fixed to the side of the water storage tank 2, and an airflow channel 33 is formed inside it for the passage of waste gas. The outside of the heat insulation box 31 is covered with heat insulation material (such as rock wool, polyurethane foam, etc.) to reduce heat loss. The heat exchanger 32 is set inside the waste heat collection hood 11, specifically located behind the negative pressure fan 14 on the waste gas flow path. The heat exchanger 32 adopts a finned tube structure to increase the heat exchange area. The waste gas pipe 12 is connected between the outlet of the waste heat collection hood 11 and the inlet of the heat insulation box 31, and is connected to the airflow channel 33.

[0025] The water circulation assembly 4 includes a mounting plate 41, a circulation pump 42, a water injection pipe 43, a water return pipe 44, and a water inlet pipe 45. The number of circulation pumps 42 is determined by the number of heat tank bodies 21. The mounting plate 41 is fixed to the side of the heat preservation box 31, the circulating pump 42 is fixed to the mounting plate 41, the inlet pipe 45 is connected between the outlet of the water storage tank 2 and the input end of the circulating pump 42; the injection pipe 43 is connected between the output end of the circulating pump 42 and the inlet end of the heat exchanger 32; and the return pipe 44 is connected between the outlet end of the heat exchanger 32 and the inlet of the water storage tank 2. It should be noted that the water injection pipe 43 and the return water pipe 44 converge in the exhaust gas pipe 12, and the water inlet pipe 45 is inserted in the heat preservation box 31 to reduce heat loss. During operation, the high-temperature exhaust gas enters the waste heat collection hood 11 under the negative pressure of the negative pressure fan 14, and undergoes the first heat exchange with the heat exchanger 32 to heat the circulating water. The heated circulating water is transported to the water storage tank 2 through the water circulation component 4. After the first heat exchange, the exhaust gas enters the airflow channel 33 of the heat preservation box 31 through the exhaust gas pipe 12, and is finally discharged from the exhaust gas outlet.

[0026] This embodiment is suitable for application scenarios with relatively simple requirements for waste heat recovery, and effectively improves the waste heat utilization rate through a two-stage heat exchange structure. Example 2

[0027] Based on Example 1, this example further optimizes the structure of the second heat exchange.

[0028] Specifically, the water storage tank 2 includes at least one heated tank body 21; In this embodiment, the water storage tank 2 is divided into multiple independent heating tanks 21, which are used to heat water for different purposes (such as cleaning water, preheating water, heat preservation water, etc.). The exhaust gas duct 12 includes a spiral tube section 121 disposed within each heat-using tank 21. It should be noted that the spiral tube section 121 is made of a metal material with good thermal conductivity (such as copper or stainless steel), and is spirally coiled inside the heat-using tank 21. Its inlet end is connected to the airflow channel 33, and its outlet end extends to the outside of the heat-using tank 21 or merges into the main exhaust pipe. The spiral structure of the spiral tube section 121 can significantly increase the contact area and contact time between the exhaust gas and the liquid in the tank. During operation, the exhaust gas, after the first heat exchange, enters each spiral tube section 121 through the airflow channel 33. Since the spiral tube section 121 is completely immersed in the liquid in the heat treatment tank 21, the residual heat of the exhaust gas is transferred to the liquid in the tank through the tube wall as it flows through the spiral tube section 121, achieving a second heat exchange. After two heat exchanges, the temperature of the exhaust gas has been significantly reduced, and it is finally discharged from the outlet of the spiral tube section 121.

[0029] Tests showed that, compared to single-stage heat exchange, the waste heat utilization rate of this embodiment is increased by about 35%-50%, with the specific increase depending on the initial temperature of the waste gas and the number of heat exchange tanks 21.

[0030] This embodiment is applicable to application scenarios with high requirements for waste heat recovery depth, such as large electric ovens or industrial furnaces operating continuously. Example 3

[0031] Based on Embodiment 2, this embodiment further adds a heat distribution module 5 and a monitoring module 6, realizing independent control and intelligent constant temperature control of each heat-using tank 21.

[0032] Heat distribution module 5: includes multiple regulating valves 51, each regulating valve 51 being disposed at the inlet of a spiral pipe section 121; It should be noted that the regulating valve 51 is preferably an electric regulating valve or a solenoid valve, used to independently control the flow rate of exhaust gas entering each spiral tube section 121; when a certain heat-using tank 21 needs more heat, the opening degree of the corresponding regulating valve 51 increases; when the heat is sufficient, the opening degree decreases or closes.

[0033] Monitoring module 6 includes multiple temperature sensing switches (or temperature sensors), each temperature sensing switch corresponding to a heating bath 21, installed on the inner wall of the heating bath 21 or in the liquid, for real-time detection of the temperature of the liquid in the heating bath 21; It should be noted that the monitoring module 6 and the heat distribution module 5 are electrically connected. The monitoring module 6 transmits the collected temperature signal to the controller (such as a PLC controller or a microcontroller). The controller automatically calculates and outputs a control signal based on the difference between the preset temperature threshold and the actual temperature, and adjusts the opening of the corresponding regulating valve 51. The specific control logic is as follows: When the monitoring module 6 detects that the real-time temperature of a certain heat-using tank 21 is lower than the set temperature (e.g., lower than 60°C), the controller controls the corresponding regulating valve 51 to increase the opening, so that more high-temperature exhaust gas enters the spiral tube section 121 of the tank and accelerates the heating. When the real-time temperature reaches the set temperature (e.g., 80℃), the controller controls the opening of the regulating valve 51 to decrease or completely close, stopping the gas supply and entering the heat preservation state. When the real-time temperature exceeds the set upper temperature limit (e.g., exceeding 85°C), the controller controls the regulating valve 51 to close completely and can issue a prompt through the alarm device.

[0034] In this embodiment, each heating tank 21 can be independently set with a different target temperature. For example, the first heating tank is set to 45°C for pre-cleaning, the second heating tank is set to 75°C for main cleaning, and the third heating tank is set to 95°C for high-temperature disinfection. The system automatically distributes the waste gas heat according to the real-time temperature of each tank, realizing on-demand heating and avoiding heat waste. It should be noted that this part is controlled by an external controller, and the circuit diagram has been disclosed and will not be described in detail in this embodiment.

[0035] This embodiment is suitable for complex application scenarios that require multiple temperature ranges and multiple uses of heat, such as food processing plants and industrial cleaning lines. Example 4

[0036] Based on Embodiment 2 or Embodiment 3, this embodiment further adds an insulation cover structure.

[0037] Specifically, the water storage tank 2 also includes a cover plate 22, which is detachably and closably installed at the opening of the heat-using tank body 21. The inner layer of the cover plate 22 is filled with heat-insulating material (such as polyurethane foam, aerogel felt, etc.) to reduce the loss of heat from the liquid in the tank. More specifically, a first magnetic strip 23 is fixed around the bottom surface of the cover plate 22, and a second magnetic strip 24 that cooperates with the first magnetic strip 23 to be attracted is fixed at the groove opening of the hot groove body 21. When the heating tank 21 is not in use, the cover plate 22 is closed at the opening of the tank. The first magnetic strip 23 and the second magnetic strip 24 automatically adhere and seal, forming a sealed and heat-insulating space, which effectively reduces heat loss. When heat is needed, the user only needs to lift the cover plate 22 upwards to overcome the magnetic attraction force to open it, which is easy to operate. In addition, a transparent observation window (not shown in the figure) can be set on the cover plate 22 to allow the user to observe the liquid level and status in the tank without opening the cover plate 22.

[0038] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: Combination Figures 1-5 The workflow of the industrial large-scale electric oven waste heat recycling, collection, conversion and utilization system provided by this invention is divided into the following stages: Waste gas collection stage: When the high-temperature waste gas generated by the electric oven is discharged from the exhaust port, the waste heat collection hood 11 set above the exhaust port will collect the waste gas. At the same time, the negative pressure fan 14 fixed inside the waste heat collection hood 11 will start to generate negative pressure and actively draw the waste gas into the waste heat collection hood 11 to prevent the waste gas from overflowing and dissipating.

[0039] The first heat exchange stage: After the high-temperature exhaust gas enters the waste heat collection hood 11, it comes into contact with the heat exchanger 32 installed inside the hood. At this time, the circulating pump 42 draws liquid from the water storage tank 2 through the water inlet pipe 45, and sends it to the heat exchanger 32 for heating through the water injection pipe 43. The heated liquid then returns to the heat-using tank 21 through the return water pipe 44, forming a closed loop to ensure continuous and efficient heat exchange. In this way, there is circulating water flowing inside the heat exchanger 32. The high-temperature exhaust gas transfers heat to the circulating water in the heat exchanger 32, causing the temperature of the circulating water to rise. After the first heat exchange, the temperature of the exhaust gas decreases, but it still contains considerable residual heat; while the heated circulating water is transported to the water storage tank 2 through the water circulation component 4 to store thermal energy for subsequent use.

[0040] Exhaust gas guidance stage: After the first heat exchange, the exhaust gas is guided through the exhaust gas pipe 12 into the airflow channel 33 inside the heat preservation box 31. The heat preservation box 31 is fixed to the side of the water storage tank 2, which plays a role in heat preservation and airflow guidance, preventing the exhaust gas from losing heat too quickly during transportation.

[0041] The second heat exchange stage: The exhaust gas enters the spiral tube section 121 installed in each heat-using tank 21 through the airflow channel 33. The spiral tube section 121 is immersed in the liquid in the heat-using tank 21. As the exhaust gas flows through the spiral tube section 121, its residual heat is transferred to the liquid in the tank through the tube wall, causing the temperature of the liquid in the tank to rise. Through the above process, the heat in the exhaust gas is extracted in stages and multiple stages, and finally the low-temperature exhaust gas can be discharged from the end of the pipeline.

[0042] The invention is also equipped with a heat distribution module 5 and a monitoring module 6 during use. Each heating tank 21 corresponds to a temperature sensing switch to detect the temperature of the liquid in the tank in real time. When the temperature of a heating tank 21 is lower than the set value, the monitoring module 6 sends a signal to control the opening of the regulating valve 51 at the inlet of the corresponding spiral tube section 121 to increase, allowing more high-temperature exhaust gas to enter the spiral tube section 121 of that tank and accelerate heating; when the temperature reaches the set value, the opening of the regulating valve 51 decreases or closes, stopping the gas supply. This achieves independent, on-demand heating for each heating tank 21.

[0043] When the heating tank 21 is not in use, the cover plate 22 can be placed over the opening of the tank. The first magnetic strip 23 on the bottom surface of the cover plate 22 adheres to the second magnetic strip 24 at the opening of the tank, effectively reducing heat loss from the liquid inside the tank and improving the heat preservation effect. The design of this invention realizes two-stage cascade recovery and intelligent distribution of waste heat from the electric oven, significantly improving waste heat utilization efficiency and reducing energy consumption.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the present invention's technology and the inventive concept of a waste heat recycling collection, conversion and utilization system for large industrial electric ovens, should be covered within the scope of protection of the present invention.

Claims

1. A waste heat recycling, collection, conversion, and utilization system for a large industrial electric oven, comprising a water storage tank (2) for containing the liquid to be heated: Its features are, Also includes: A heat collection device (1) is installed above the exhaust pipe of the electric oven to collect heat from the exhaust gas; The heat exchange unit (3) is connected to the heat collection device (1) and the water storage tank (2) respectively, and is used to perform step-by-step heat exchange on the collected waste gas so as to transfer the heat in the waste gas to the liquid in the water storage tank (2) in stages.

2. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 1, characterized in that, The heat collection device (1) includes a waste heat collection hood (11) and a negative pressure fan (14). The waste heat collection hood (11) is used to cover the exhaust gas outlet. A frame (13) is fixed to the port of the waste heat collection hood (11). The negative pressure fan (14) is fixed inside the frame (13) to generate negative pressure to draw in the exhaust gas.

3. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 2, characterized in that, The heat exchange unit (3) includes: A heat preservation box (31) is fixed to the side of the water storage tank (2), and an airflow channel (33) is formed inside it. A heat exchanger (32) is installed inside the waste heat collection hood (11) to perform the first heat exchange with the collected waste gas in order to heat the circulating water; And an exhaust gas pipe (12) is connected between the waste heat collection cover (11) and the heat preservation box (31) and communicates with the airflow channel (33) to guide the exhaust gas after the first heat exchange into the airflow channel (33).

4. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 3, characterized in that, The water storage tank (2) includes at least one heated tank body (21); The exhaust gas duct (12) includes a spiral tube section (121) disposed in each of the heat-using tanks (21). The spiral tube section (121) is connected to the airflow channel (33) to allow the exhaust gas to undergo a second heat exchange with the liquid in the heat-using tank (21) when it flows through the spiral tube section (121).

5. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 4, characterized in that, The system also includes a heat distribution module (5), which includes multiple regulating valves (51), each of which is located at the inlet of one of the spiral pipe sections (121) to independently control the flow of exhaust gas into each spiral pipe section (121).

6. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 5, characterized in that, The system also includes a monitoring module (6), which includes multiple temperature sensing switches, each temperature sensing switch being set for a heat tank (21) to detect the real-time temperature of the liquid in the heat tank (21). The monitoring module (6) is electrically connected to the heat distribution module (5), and the monitoring module (6) is used to control the opening degree of the regulating valve (51) according to the real-time temperature.

7. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 3, characterized in that, The system also includes a water circulation component (4) connected between the heat exchange unit (3) and the water storage tank (2) for driving the liquid in the water storage tank (2) to circulate between the heat exchange unit (3) and the water storage tank (2).

8. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 7, characterized in that, The water circulation assembly (4) includes a mounting plate (41) fixed to the side of the heat preservation box (31), a circulation pump (42) fixed to the mounting plate (41), an inlet pipe (45) connected between the water storage tank (2) and the input end of the circulation pump (42), and a water injection pipe (43) connected between the output end of the circulation pump (42) and the inlet end of the heat exchanger (32). And a return water pipe (44) connecting the outlet end of the heat exchanger (32) and the water storage tank (2), the water injection pipe (43) and the return water pipe (44) converge in the exhaust gas pipe (12), and the water inlet pipe (45) is inserted in the heat preservation box (31).

9. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 4, characterized in that, The water storage tank (2) also includes a cover plate (22), which is detachably disposed at the opening of the heat-using tank (21) to reduce heat loss.

10. The industrial large-scale electric oven waste heat recycling, collection, conversion, and utilization system according to claim 9, characterized in that, The bottom surface of the cover plate (22) is provided with a first magnetic strip (23), and the groove of the heating tank (21) is provided with a second magnetic strip (24) that cooperates with the first magnetic strip (23) to be attracted.

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